FORCED CONVECTION OVEN MODEL DRM620DD OPERATION MANUAL HIRO COMPANY

Transcription

1 FORCED CONVECTION OVEN MODEL DRM620DD OPERATION MANUAL HIRO COMPANY 64-1, Sumiyoshi 5-chome, Naka-ku, Yokohama City , Japan Tel , Fax Website: 1

2 Satiety Instructions: Before installation or use, read tile following Safety Instructions carefully. Not complying with the instructions in this manual will make void the manufacturer's warranty and may pose dangerous risks to the user. Safety instructions are illustrated in the following manner: WARNING Failure to observe WARNING signs could result in serious injury or possible accident of death. CAUTION Failure to observe CAUTION signs could result in personal injury and/or damage to the unit and the associated property. Symbols shown: means a caution (including a warning). means that such an action is prohibited. means that such an instruction must be followed. i

3 WARNING Installation and/or relocation of the unit should be conducted by a qualified engineer. Incorrect installation would result in water leakage, electric leakage, electric shock, fire or failure of the unit, etc. Make sure that the unit has been electrically grounded. DO NOT ground the unit through a gas pipe, a water pipe, a lightning rod nor a telephone line. Incomplete grounding may cause electric shock. Supply the power source through the dedicated outlet. A multiple outlet or multiple connections may cause electric shock or fire. Power line sharing with the other electric appliances may lead to voltage drop of the power line or cause a failure of the unit. To avoid electric leakage and electric shock, DO NOT use the unit at a humid place nor outdoors. DO NOT spray nor splash the unit with water or any other liquid. Seepage of water or other liquids into the unit may cause short circuit or electric shock. Turn off the electric leakage breaker when the unit works abnormally. Any abnormal operation may trigger serious accidents including electric shock and fire. The unit has no explosion proof structure. Therefore, DO NOT apply inflammables nor explosives, which may cause explosion or fire.] The unit has no anti-corrosive structure. Therefore, DO NOT use it in the presence of acidic, alkaline and other corrosive materials including those which generate corrosive gases. To avoid burns, DO NOT touch the structures of chamber, air vent and door during the operation or just after the operation. DO NOT operate the unit with wet hands to avoid electric shock. DO NOT put anything on the bottom plate. A heater is mounted beneath the bottom plate. If any article is put direct on the bottom plate, it may cause serious accidents like fire. Pay close attention to the setpoint temperature when plastic articles are dried. Plastic articles may melt at high temperatures and stick to the heater and cause fire. Detach the door from the unit when you dispose it in order to prevent children from unexpected accidents. ii

4 CAUTION DO NOT damage the power cord. Heavy articles, strong tension or any other force applied to the cord may cause damaging the cord, which may lead to electric shock or fire. DO NOT put any article exceeding 15kg in weight on the shelf. Load to be applied to the shelf is limited to 15kg at maximum in weight. The larger load to the shelf would damage the shelf and its supporting parts. Articles on the shelf should be loaded evenly with vacancy of 30% or more in the area. Do not block airflow through the shelves with foils, too many samples, etc. The airflow blocking would result in temperature deviation inside the chamber. DO NOT step on the unit. Stepping on the unit may damage it or cause injury to the operator. DO NOT put any article on the unit. It may fall from the unit and damage the unit or cause injury to the operator. When doing maintenance or inspection, turn off and unplug the unit first to avoid electric shock. Dust accumulation on the power plug may cause fire. Unplug and clean it once a month. Unplug the unit when it is not used for a long time more than a month. DO NOT attempt to disassemble, repair nor modify the unit. Be aware that the unit contains no user-serviceable parts. Repair must be performed by a qualified engineer only. iii

5 Enforcement Order of the Industrial Safety and Health Law Cabinet Order No. 318, August 19,1972 Amendments: Cabinet Order No. 240, July 28,1999 Attached Table 1 Dangerous Substanoes (related to Article 1, 6 and 15) Prohibition to use the following substances and gases on our Reactor unit Caution: Don't put the below-mentioned things and substances including these things into the reactor unit oven absolutely. It will cause an accident of explosion or fire. 1. Explosive Substances (1) Nitroglycol, nitroglycerin nitrocellulose and other explosive nitric esters, etc. (2) Trinitrobenzene, trinitrotoluene, picric acid and other explosive nitro-compounds (3) Peracetic acid, methyl ethyl ketone peroxide, benzoil peroxide and other organic peroxides (4) Sodium azide and other metallic azides 2. Combustible Substances (1) Metallic "lithium" (2) Metallic ''Potassium (3) Metallic "Sodium'' (4) Yellow phosphorus (5) Phosphorous sulfide (6) Red phosphorous (7) Celluloids and the like (8) Calcium carbide (calcium carbonate) (otherwise known as carbide) (9) Calcium phosphide (10) Magnesium powder (11) Aluminium powder (12) Metallic powders other than magnesium powder and aluminium powder (13) Sodium dithionite (sodium hydrosulfite) 3. Oxidizing Substances (1) Potassium chlorate, sodium chlorate, ammonium chlorate and other chlorates (2) Potassium perchlorate, sodium perchlorate, ammonium perchlorate and other perchlorates (3) Potassium peroxide, sodium peroxide, barium peroxide and other inorganic peroxides (4) Potassium nitrate, sodium nitrate, ammonium nitrate and other nitrates (5) Sodium chlorite and other chlorites (6) Calcium hypochlorite and other hypochlorites 4. Inflammable Subatances (1) Ethylether, gasoline, acetaldehyde, propylene oxide, carbon disulfide and other substances (whose flash points are lower than -30 C) (2) n-hexane, ethylene oxide, acetone, benzene, methylethylketone and other substances (whose flash points are -30 C or higher and lower than 0 C) (3) Methanol, ethanol, xylene, pentylacetate (otherwise known as amylacetate) and other substances (whose flash points are 0 C or higher and lower than 30 C) (4) Kerosene, light oil, turpentine oil, isopenthylalcohol (otherwise known as isoamylalcohol), acetic acid and other substances (whose flash points are 30 C or highe and lower than 65 C) 5. Combustible gases (hydrogen, acethylene, ethylene, methane, propane, buthane and other combustible substances in the form of gas at 15 C and 1 atm) iv

6 Preparation Installation area (1) Do not install the unit at the following locations: Outdoors Where exposed to the direct sunlight With high humidity With the ambient temperatures below 5⁰C or above 35⁰C Where exposed to any combustible or corrosive gases With excessive dust Without any sufficient clearace around the unit Where the unit cannot be maintained at a flat and stable position Do not install the unit at such an area as shown below. Install the unit indoors at the following place. Direct sunlight Combustible gas - Ambient temperature: 5⁰C to 35⁰C - Humidity: 85%RH or less (without condensation) - Flat place, where the unit can be kept horizontally. Inflammable or explosive material Corrosive liquid WARNING Never install the unit at the place with any dangerous atmosphere. Dust Humidity Prohibition of installation (2) Keep enough clearance around the unit to keep its performance. v

7 Introduction Do not use any other parts than our associated accessories and optional parts. Our guarantee for the supplied unit is not applied when you use such other parts. [Overview] This unit is a fan-heating type Forced Convection Oven that enables rapid and homogenous heating by circulating heated air. Programmable operation is available as the standard configuration with easy setting. [Specifications] Model Convection mode Performance *1 Temperature range for use Temperature control accuracy Temperature distribution accuracy Temperature rise time Ambient temperature for use Construction Temperature controller Operation mode Temperature sensor Heater Heater capacity Blower fan Interior finish Exterior finish Door packing Safety devices Specifications Inside effective dimensions *2 Outside dimensions Internal volume of chamber Observation window Number of shelves & pitch Exhaust vents Power supply Power facility Weight DRM620DD Forced convection, Blow fan type (down flow from the reverse wall) 40⁰C to 270⁰C ±0.5⁰C at 270⁰C ±4⁰C at 270⁰C Approx. 90 min. from the room temperature to 270⁰C 5⁰C to 35⁰C Micro-computer PID control (TC-SVI system) Fixed value or programmable operation (max. 100 steps, cooling) 1 min. to 99 hrs. 59 min. K-thermocouple Stainless-steel sheathed heater 1.4 kw Sirocco fan (aluminium-made) SUS304 Zinc-plated steel with baked melamine resin Silicon rubber Self-diagnostic functions (overheat, temp. sensor error, heater wire breaking, SSR short-circuit, ambient temp. error), Independent overheat protector, Control circuit protective fuse, Key-lock function, Overcurrent/electric leakage breaker, Door switch 610W x 500D x 492H (455H) mm 740W x 685D x 860H mm Approx. 150L 200W x 250H mm 9 shelves, 48mm 28mm dia. x 2 pieces 100V AC, 15A 100V AC, 20A Approx. 65kg *1: The oven's performance is based on the ambient temperature for use at 23⁰C and at the rated power voltage, where the exhaust vent is closed and there is no sample for test. *2: The effective dimensions are indicating the ones from the ceiling plate to the shelf placed at the lowest stage, not including any protrusions. 1

8 [Name of Parts] Outside View Exhaust vents 2 Door 3 Observation window 4 Door switch 5 Operation panel 6 Operation panel 7 Door handle 8 Power switch 9 Overcurrent/electric leakage breaker 10 Power cord (2m) 11 40mm dia. hole (right/left: 2 pcs.) 12 Door limit switch

9 Operation Panel If you press a key on the operation panel very strongly or using any sharp-pointed object, it will be deformed or damaged. So, press a key softly by your own finger. 1 Heater lamp Lights up when a heater is operated. 2 AutoTuning lamp Lights up during the auto-tuning. 3 PV indicator Indicates the temperature inside the chamber. 4 Fix lamp Lights up at the time of fixed value operation. 5 Lights up at the time of program operation. Program lamp Blinks at the time of cleaning operation 6 Program content lamp Lights up depending on the content of the program indicator. 7 Program indicator Indicates patterns and step numbers at the time of program operation. 8 Controlled (-) lights up at the time of fixed value operation. At the time of Gradient lamp program operation, the gradient status is indicated as (up), (down) and - (controlled). 9 Run lamp Lights up when the oven is operated. 10 Set lamp Lights up during the setting mode. 11 Alarm lamp Lights up when an alarm is tripped. For more details, see "Self 12 SV content lamp Lights up depending on the content of the SV indicator. 13 SV indicator Indicates the set temperature and time. 14 Shift key While pressing this key, keys at the lower side can be operated. 15 (1) > (right-shifting) key A digit shifts rightward when setting the temperature and time. (2) < (left-shifing) key A digit shifts leftward when setting the temperature and time. 16 (1) Mode key Changes over the operation mode. (2) Menu key A menu screen appears when pressing this key during the operation. 17 (1) V (down) key Values are decreased when pressing this key while you input values. (2) Back key Changes over to a previous item while setting the program operation. 18 Set key Changes over to the setting mode. 19 (1) (up) key Values are increased when pressing this key while you input values. 20 (2) Next key (1) Run key (2) Stop key Changes over to a next item while setting the program operation. Starts the operation. Stops the operation. 3

10 [Exhaust Vents] Open or close the exhaust vents to adust the ventilation volume. CAUTION Do this adjustment of the exhaust vents before you turn on the overcurrent/electric leakage breaker. Exhaust vents control Exhaust vent You can use these vents as cable holes for wiring to a device to be placed inside the chamber. Be careful so that you do'nt get burnt while using the oven at the high temperature. Prohibition to touch Use the vents normally at the condition that those are slid and opened more than 1/3. Do not use the oven when there is moisture vapor inside the chamber and while drops of water are attaching to the inner wall or the door. Not observing this caution may case electric shock, electric leakage, fire or failure. Prohibition of water drops Open/close Depending on your sample's moisture content, control the opening degree of the exhaust vents. Do not use the oven when any drops of water are attached to the inner wall or the door. [Connection to the Power Source] 1. Make sure that the overcurrent/electric leakage breaker has been turned off. Overcurrent/electric leakage breaker Overcurrent/electric leakage breaker 2. Make sure of the supply voltage for the oven. Model Power source (50/60 Hz) Needed electric facility DRM620DD 100V AC, 15A 100V AC, 20A 4

11 [Confirmation of Samples] WARNING Do not put any combustible, inflammable and volatile material into the chamber. Not observing this may cause explosion or fire. Warning for explosion CAUTION Do not use any acidic, inflammable or corrosive material, any material that may generate such gases, nor salty water. The oven has no corrosion-free structure, so corrosion may malfunction, electric shock, electric leakage or fire. Strict prohibition of corrosive material Check the melting point, flash point and ignition point of your samples. It is necessary to set the test temperature to 80⁰C or lower than the lowest temperature among the melting point, flash point and ignition point of your samples. Check again if your samples can satisfy the above condition or not. The oven can be used within the temperature range of 40⁰C and 270⁰C. (Example) In case the lowest temperature among the melting point, flash point and ignition point of your samples is 300⁰C, the temperature that you can use comes to the range of 40⁰C and 220⁰C. 40⁰C 220⁰C 270⁰C 300⁰C Temperature range for use of the oven Usable temperature range [Door Switch] Close the door completely before you start to operate the oven. When closing the door, do it without pulling a door handle. Otherwise, the door will not be completely closed and it may open during the operation. While the door is open, the door switch is tripped and "door" is indicated on the PV indicator. When the door is opened during the operation, the power supply to the heater is shut off due to the function of this door switch. The oven's operation resumes when the door is completely closed. Door switch 5

12 Operation [Operation Mode] Fixed Value Operation This is the mode where the oven is operated by the fixed constant temperature. Stop function enabled RUN [ 1] No temperature control starts even if the power switch is turned on. Stop function disabled RUN [ 0] Temperature control starts at the same time when the power switch is turned on. Temperature control starts when the pressed for 2 seconds. key is Temperature control stops when the pressed while pressing the key. key is Temperature control stops when the pressed while pressing the key. key is Temp. End Temp. End Time Time The said Stop function can be changed by so setting as mentioned in the "9. Stop Function" (page 41). This has been set to "Enabled [ 1]" at the time of shipment from the factory. Program Operation This is the mode where the oven is operated following the time and the temperature that have been set step by step. Temp. Setting time End (Indicated as End) Time 6

13 [Basic Operation] The basic flow of operation is explained as mentioned below. 1. Preparation 1 2. Preparation 2 3. Startup 4. Operation Set the independent overheat protector. Turn on the overcurrent/electric leakage breaker. Turn on the power switch. Set the operation mode, time and temperature and start the operation. Fixed value operation... 8p. Program operation... 11p. CAUTION Overcurrent/electric leakage breaker Run a check on the overcurrent/electric leakage breaker once a month. If there is any failure on this breaker, it may cause electric shock or fire. OFF (O) Power switch ON ( I ) Check CAUTION Do not touch the door or the exhaust vents during the operation at high temperature or just after finishing the operation. Otherwise, you will get burnt. Prohibition to touch To check this breaker, press the "Test" button while it is turned on. In case it is normal, it should be turned off. Test button 5. Operation Stop While pressing the key, press the key to stop the operation. Set the temperature of the independent overheat processor to 30⁰C higher than the temperature of use. 6. Power Shutdown Turn off the power switch. Setting example: Set to 180⁰C if the setting temperature is 150⁰C. 7. End of Work Turn off the overcurrent/electric leakage breaker. CAUTION Run a check on the independent overheat processor once a month. If it does not function normally, it may cause fire or damage your samples. For more details of this check, refer to "Test of independent overheat processor" (page 43). Check CAUTION When the oven is not used for more than a month, do not forget to turn off the overcurrent/electric leakage breaker and disconnect the power plug. Accumulation of dust on the plug may cause heating and fire. Power shutdown 7

14 [Setting of Temperature and Time] At the time of your setting the temperature and time, if there is any unknown indication on the display or if you cannot operate the keys, refer to "Troubleshooting" (page 33). Fixed Value Operation (Fix) This is the mode where the oven is operated by the fixed constant temperature. Operation example: Before setting : Set to 120⁰C After setting : To be set to 250⁰C 1 When you press the key, the current operation mode lamp blinks and you can select the mode. Press the key or the key to change over the operation mode. Keep the Fix lamp blinking. 2 When you press the selected and set. The Fix lamp lights up. key, the Fixed Value Operation is 3 When you press the Temperature setting. key again, the mode is changed to The Set lamp lights up and the 1st digit of the setting temperature on the SV indicator starts blinking. You can change the value of this blinking digit. 8

15 4 When you press the shifts rightward. key, a digit for change (blinking) When you press the key while pressing the key, a digit for change (blinking) shifts leftward. When you press the key, the value is increased, while when you press the key, the value is decreased. Change the setting temperature from "120" to "250". If you press the key when the value is "9", it becomes "0", while if you press the key when the value is "0", then it becomes "9". If you input the value beyond the setting range, your setting becomes void. 5 Press the key to fix your input value. The Set lamp goes out, and the setting mode ends. If there is no input for more than 1 minute during the setting, no change is made and the screen returns to the initial screen of Fixed Value Operation. If you input any wrong value, redo the value setting from the beginning. 6 The Fixed Value operation starts when the kept pressed for 2 seconds. The Run lamp lights up. key is To terminate the Fixed Value operation, press the key while pressing the key. The Run lamp goes out and this operation is terminated. 9

16 Display Changeover Screen During the Fixed Value operation, if you press the key while pressing the key, the screen changes over to the SV indicator's display changeover screen and the SV content lamp lights up. On this SV indicator's display changeover screen, its display content changes over by pressing the key. When the key is pressed on the screen of the content you want to display, it is so set and it is so displayed during the operation. The SV content lamp for the content being displayed lights up (it goes out at the display of the current value). while pressing Setting temp. (⁰C) Accumulated time (x10h) Power consumption (W) Control unit ambient temp. (⁰C) Current value (A) 10

17 Program Operation 1. Program Setting and Operation When you make a new program, make a table as shown below. Then, based on the table you have made, input a program into the oven. When you work in this way, input mistake can be avoided and you can easily set a program. <Program setting example> Setting to Pattern 1 Step 01 : Temperature rise from 25⁰C (room temp.) up to the setting temperature of 140⁰C by one hour Step 02 : Keeping 140⁰C for 40 minutes Step 03 : Temperature rise to the setting temperature of 250⁰C by 2 hours Step 04 : Keeping 250⁰C for 40 minutes Cooling CL : Cooling for 1 hour Repeat number : 1 Activation at power failure : Resuming (CONT) from the step where power failure took place. Wait function : Enabled (ON) Wait range : ±3⁰C Wait monitoring time : 1 hour Step No. Setting Temp. (⁰C) Setting Time (hr.:min.) [Terminology] (For more details, refer to the "2. Bits of Knowledge" (page 20).) Pattern... Unit of program consisting of multiple steps Step... 1 unit of action (shown by a kinked line) constituting a pattern The number of steps you can set is 100 steps at maximum for all the patterns in total. In case of 1 pattern only, 99 steps can be set at maximum. When setting a step to "01", no operation is possible. Repeat number... Following the number of times you have set, programs are repeatedly executed. You can set 99 times as the maximum repeat number of times. If it is set as "00", it should be the setting as infinity. Activation at power failure... Supposing the power shutdown due to power failure during the program operation, you can make a choice for the action to be taken after recovery of power supply. "STOP" : Control is ceased. "CONT" : Program is resumed from the beginning of the step where power failure took place. "REST" : Program is resumed from its own 1st step. Wait function... In case the oven operation is not performed as having been set due to insufficient capacity at the time of temperature rise or lowering, proceeding to a next step is suspended until the temperature reaches the set value. Wait range... If the measured temperature reaches the temperature range of the set value to be added by the wait range, program proceeds to a next step. If the wait range has been set to " 00", program proceeds to a next step as soon as the temperature reaches the set value. Wait monitoring time... In case program does not proceed to a next step even if the wait monitoring time has passed after the wait function has been activated, the (WAIT) will be indicated on the PV indicator, and the operation stops. This indication is released when the power switch is turned on again. This function can be disabled if the wait time is set to "00:00". 11

18 1 When you press the key, the current operation mode blinks and you can select the mode. Press the key or the key to change over the operation mode. Keep the Program lamp blinking. 2 When you press the selected and set. key, the Program Operation is The Program lamp lights up. On the Program indicator, the program pattern No. (the 1st digit is blinking) that you are currently selecting is indicated and on the SV indicator, the number of steps that is registered on its pattern No. is indicated. 3 When you press the key again for 2 seconds, the mode is changed to Program setting. On the PV indicator, (PROG) starts blinking. 4 When you press the Pattern No. setting. On the PV indicator, When you press the shifts rightward. key, the mode is changed to (PTN) is indicated. key, a digit for change (blinking) When you press the key, the value is increased, while when you press the key, the value is decreased. Set the pattern No. to "01". If you press the key when the value is "9", it becomes "0", while if you press the key when the value is "0", then it becomes "9". If you input the value beyond the setting range, your setting becomes void. 12

19 5 Press the key while pressing the key to change over the mode to Step number setting. On the PV indicator, (STEP) is indicated. Set the number of steps to "04". The total number of steps you can set is 100 steps for all the patterns in total. 6 Press the key while pressing the key to change over the mode to the Step 01 temperature/time setting. The "STEP" of the Program Content lamp lights up and on the Program indicator, " 1" is indicated. Set the setting temperature on the PV indicator to " 140" and the setting time on the SV indicator to "01:00". To move from the PV indicator to the SV indicator, press the key. 7 Press the key while pressing the key to change over the mode to the Step 02 temperature/time setting. On the Program indicator, " 2" is indicated. Set the setting temperature on the PV indicator to " 140" and the setting time on the SV indicator to "00:40". 8 Press the key while pressing the key to change over the mode to the Step 03 temperature/time setting. On the Program indicator, " 3" is indicated. Set the setting temperature on the PV indicator to " 250" and the setting time on the SV indicator to "02:00". 13

20 9 Press the key while pressing the key to change over the mode to the Step 04 temperature/time setting. On the Program indicator, " 4" is indicated. Set the setting temperature on the PV indicator to " 250" and the setting time on the SV indicator to "00:40". 10 Press the key while pressing the key to change over the mode to the Cooling time setting. On the PV indicator, (COOL) is indicated. Set the setting time on the SV indicator to "01:00". 11 Press the key while pressing the key, and (END) is indicated as blinking on the SV indicator. 12 Press the key to change over the mode to the Program setting initial screen. 13 Press the setting, and PV indicator. key to change over the mode to the Repeat (RPT) is indicated as blinking on the 14

21 14 Press the key to change over the mode to the Pattern No. setting for repeat setting. Set the pattern No. to "01" 15 Press the key while pressing the key, and the mode is changed over to the Repeat number setting. Set the repeat number to "01". 16 Press the key to fix this Repeat setting. 17 Press the key to change over to the mode to select an activation after the recovery from power failure. (POFF) is indicated as blinking on the PV indicator. 18 Press the key to set the activation after the recovery from power failure. To change this setting, press the key or the key. Set this activation to be taken to " " (CONT). For more details of this activation, refer to page

22 19 Press the key to fix this activation after the recovery from power failure. 20 Press the wait action. key to change over the mode to select the (WAIT) is indicated as blinking on the PV indicator. 21 Press the key to change over to the Wait action setting. To change this setting, press the key or the key. Set this wait action to "ON". For more details of this function, refer to page Press the key while pressing the key to change over the mode to the Wait range upper limit setting. (WT-H) is indicated as blinking on the PV indicator. Set this upper limit to " 03". <Example> In the program of cooling down from 200⁰C to 150⁰C, program proceeds to a next step when the temperature inside a chamber reaches 153⁰C. 23 Press the key while pressing the key to change over the mode to the Wait range lower limit setting. (WT-L) is indicated as blinking on the PV indicator. Set this lower limit to " 03". <Example> In the program of heating from 200⁰C to 250⁰C, program proceeds to a next step when the temperature inside a chamber reaches 247⁰C. 16

23 24 Press the key while pressing the key to change over the mode to the Wait monitoring time setting. (WOUR) is indicated as blinking on the PV monitor. Set the wait monitoring time to "01:00". <Example> After this function is activated, if program does not proceed to a next step even after 1 hour has elapsed, the operation will be stopped. 25 Press the key to fix the Wait action. 26 Press the key for 2 seconds to fix this setting. The Set lamp goes out and a program setting ends. Set the program pattern No. on the Program indicator to "01". 27 Press the Operation. key for 2 seconds to start the Program The Run lamp lights up. When you have selected the program pattern where the step was set to "01", (ERR) is indicated on the PV indicator and the operation does not start. 28 When all the steps have ended, the control stops and cleaning starts. During the cleaning, Program lamp blinks. 17

24 29 When the cleaning ends, (End) blinks on the SV indicator and the operation is terminated.. To terminate the Program Operation, press the key while pressing the key. The Run lamp goes out and the operation is terminated. To release the "END" screen, press the key while pressing the key. The screen returns to the initial screen of the Program Operation. 18

25 Menu Screen During the Program Operation, when you press the key while pressing the key, the menu screen appears and (MONI) is indicated as blinking on the PV indicator. When the key is pressed, screen changes to the display switchover screen of the SV indicator and the SV content lamp blinks. On the SV indicator's display switchover screen, its content changes over when you press the key. On the SV indicator's display switchover screen, when you press the key while pressing the key, screen changes over to the Program indicator's display switchover screen and the Program content lamp blinks. On the screen of the content you want to display, when you press the displayed during the Program Operation. key, it is fixed and continues to be In this case, the SV content lamp for the content being displayed lights up and the Program content lamp also lights up. Press while pressing. Set temperature (⁰C) under execution Remaining time (h:m) of steps under execution Press while pressing. Step No. under execution Remaining repeat numbers Program pattern No. under execution 19

26 2. Bits of Knowledge Setting of repeat number of times: If you want to repeat the same pattern, set the repeat number of times (from twice to 99 times). If this repeat number of times is set to "00", its setting shall become infinite. If no repeat is needed, set this number to "01". The last step of repeat number and the next step are automatically connected. Temp. Last step Next step Time Setting of activation at the time of power failure: Select the action to be taken in case the power supply is shut off during the Program Operation due to power failure, etc. [STOP] : The operation is stopped. [CONT] : Program is resumed from the beginning of the step where power failure took place. [REST] : Program is resumed from its own 1st step. Temp. Power failure Time Wait function: Program does not proceed to a next step by waiting until the measured temperature reaches the temperature set by program. If this function is set to " ON", the operation is performed as shown in the right figure. To skip this Wait function, apply the Skip function (page 22). Then, program can proceed to a next step. Temp. Set temp. Measured temp. Wait time Program's operation time becomes longer than the set time for the added wait time. Time Wait range: Program proceeds to a next step when the measured temperature reaches the temperature set by program to be added by the wait range. If this Wait Range is set to " 00", program proceeds to a next step when the temperature reaches the set temperature. Temp. Set temp. Measured temp. Wait time Upper limit of wait function Lower limit of wait function Proceeds to a next step. Wait monitoring time: After the Wait function has been activated, if program does not proceed to a next step even after the wait time has passed, the (WAIT) will be indicated on the PV indicator, and the operation stops. This indication is released when the power switch is turned on again. This function can be disabled if the Wait Monitoring Time is set to "00:00". Temp. Time Set temp. Measured temp. Wait monitoring time Time 20

27 Auto stop timer operation: At the time of delivery from the factory, the following setting has been made to the program's pattern No. 1 and it can be used as the auto stop timer operation. To make use of this operation, set the Step 1's temperature, Step 2's temperature, time and cooling time. Program Pattern No. 1 Step 01 : Temperature rise to 150⁰C by 1 minute (Rise to the set temperature within the shortest time) Step 02 : Keeping 150⁰C for 2 hours Cooling CL : Cooling for 1 hour Repeat number of times: Once Activation at power failure: Stopping the control "STOP" Wait function : Enabled "ON" Wait range : ±3⁰C Wait monitoring time: Disabled Step No. Set temperature (⁰C) Set time (hour : minute) 21

28 3. Skip Function By forcibly applying this function, program proceeds to a next step. In this Skip selection, if you set it to "ON", program proceeds to a next step. <Example> Step 1 : Temperature rise to the set 150⁰C by 1 hour Step 2 : Keeping 140⁰C for 40 minutes Moving to Step 2 at the remaining time of 20 minutes in Step 1 1 When you press the key while pressing the key during the operation of program, screen changes over to the display switchover screen, and (MONI) is indicated as blinking on the PV indicator. 2 When you press the the Skip selection. On the PV indicator, key, the mode is changed over to (SKIP) is indicated as blinking. 3 Set the key to change over to the Skip setting. To change this setting, press the key or the key. Set SKIP to "ON". 4 Press the to a next step. key to fix this setting, and program proceeds 22

29 3. Hold Function By applying this function, you can suspend the operation of program temporarily during the Program Operation. When you set "ON" in the Hold setting, program is temporarily interrupted and the setting temperature is controlled at its point of the step. When you return this setting to "OFF", this Hold function is released and the operation resumes. 1 When you press the key while pressing the key during the operation of program, screen changes over to the display switchover screen, and (MONI) is indicated as blinking on the PV indicator. 2 When you press the the Hold selection. On the PV indicator, key, the mode is changed over to (HOLD) is indicated as blinking. 3 Press the key to change over to the Hold setting. To change this setting, press the key or the key. Set Hold to "ON". 4 Press the key to fix this setting, and the operation is temporarily interrupted. On the Program indicator, (HD) is indicated as blinking. When you set Hold to "OFF", this function is released. 23

30 [Default Settings for User] Various parameters have been preset to the temperature controller at the time of delivery from the factory as mentioned below. 1. Various values of default settings at the time of delivery from the factory Setting items Model DRM620DD Overheat alarm temperature ALH 10 Over-cooling alarm temperature ALL 0 Auto-tuning AT 0 Key lock LOCK 0 Low temp. side correction temperature PBPL 25 Low temp. side correction value PBL * High temp. side correction temperature PBPH 270 High temp. side correction value PBH * Correction temperature AJP 150 Correction value BIAS * Brightness of indicator LED 1 Stop function RUN 1 Maximum pattern numbers PSET 10 Maximum step numbers SSET 10 Low temp. side proportional band P1 0 Low temp. side integral time I1 153 Low temp. side differential time D1 1 Medium temp. side proportional band P2 1 Medium temp. side integral time I2 152 Medium temp. side differential time D2 38 High temp. side proportional band P3 4 High temp. side integral time I3 262 High temp. side differential time D3 65 Protection of settings INLK 1 * Individual value for each temperature controller has been set here. Therefore, before you start to use the oven, check each value and input it in the above blank column. 24

31 2. Changeover to Setting Screen & Change of Setting Values 1 On the initial screen of Fixed Value Operation or Program Operation, or or during the Fixed Value Operation, when your press the key and the key at the same time for 5 seconds, screen changes over to the Default setting screen for user. The Set lamp blinks and PV indicator (ALH) is indicated on the 2 When you press the key, the 1st digit of the SV indicator blinks and you can change the setting. The value of a blinking digit can be changed. At the time of delivery from the factory, the default settings are protected and you cannot change the settings. In case you want to change the default settings for the first time, release this protection by referring to "14. Protection of Settings" (page 30). 3 When you press the shifts rightward. key, a digit for change (blinking) When you press the key while pressing the key, a digit for change (blinking) shifts leftward. When you press the key, the value is increased, while the value is decreased when you press the key,. 4 Press the key to fix the setting you have made. 25

32 5 Press the setting. key to change over to the next item of Default On the PV indicator, (ALL) is indicated. 6 When you finish the setting, press the key and the key at the same time. Then, screen returns to the previous screen. If there is no key operation for 1 minute or more during the above setting, the items set and fixed until that time become valid, while the items being changed become invalid, then screen returns to the previous screen. 3. Overheat Alarm Temperature You can set the temperature (deviation value) to trigger an overheat alarm. It has been preset to " 10" at the time of delivery from the factory. In this case, this alarm is triggered if the temperature inside a chamber exceeds the set temperature + 10⁰C. Do not change this value under normal conditions. 4. Over-cooling Alarm Temperature You can set the temperature (deviation value) to trigger an over-cooling alarm. It has been preset to " 0" at the time of delivery from the factory. In this case, this alarm is invalid. Never change this value. If changed, the temperature controller may not function normally. 26

33 5. Auto-tuning During the operation, if there occurs any fluctuation in the temperature control, the optimum PID value is automatically selected. Under the control at the set temperature, set this auto-tuning to " 1". When the default setting for user has ended, this auto-tuning starts. " 0" : Stop " 1" : Start The PID value has been adjusted at the time of delivery from the factory. To execute this auto-tuning, do it after the temperature has reached the set value. Depending on the conditions, there will be a case that the controllability will not be improved even if the auto-tuning is executed. At such a case, input the original PID value (page 24). During the auto-tuning, the AutoTuning lamp is blinking. (It goes out when the auto-tuning ended.) If the setting temperature is changed during the auto-tuning, it will be stopped. The auto-tuning cannot be started when the operation is stopped. If the temperature control is not well done by overshoot, etc. even if the auto-tuning has been executed, try to contact us. 6. Key Lock Use this when there is no setting change for some time or for the protection from any mistake in the operation. This key lock becomes valid if " 1" has been set and the default setting for user has ended. After this key lock has become valid, all the key operation becomes invalid. " 0" : Key lock is invalid. " 1" : Key lock is valid. If any key is operated while the key lock is valid, (LOCK) will be indicated as blinking for 2 seconds on the PV indicator. To release this key lock, press the key for 5 seconds. 27

34 7. Temperature Correction If there is any deviation between the temperature inside a chamber and the actually measured temperature, it can be corrected. To carry out this temperature correction, use the temperature sensor, thermocoupletype recorder or thermometer (having a traceability to the national standard) as the standard, and set a measuring point at the vicinity of a center near the temperature sensor of the temperature controller. Displayed temp. High. Setting temp. High : Displayed by this unit : Actually measured This is the temperature to be corrected. Input the setting temperature (actual temperature for use). This is the deviation between the displayed temperature and the measured temperature. If the actually measured temperature is 4⁰C lower than the displayed temperature, input "- 4". If the actually measured temperature is 4⁰C higher than the displayed temperature, input " 4". If you still find some more deviation between the displayed temperature and the measured temperature even after you have input the value for correction, do this correction once again. Never change the Low temp. side correction temperature (PBPL), Low temperature side correction value (PBL), High temperature side correction temperature (PBPH) and High temperature side correction value (PBH). 8. Setting Brightness of Indicator The indicator's brightness can be set for 3 stages of " 0", " 1" and " 2". " 2" is the brightest. 28

35 9. Stop Function You can select the function available to use when turning on the power. This function has been preset to Stop Function Valid " 1" at the time of delivery from the factory. Stop Function Valid: RUN " 1" The temperature control does not start even after the power switch is turned on. It starts when the key is pressed for 2 seconds. Stop Function Invalid: RUN " 0" The temperature control starts at the same time when the power switch is turned on. Temp. End Temp. End Time Time 10. Program Pattern & Step PSET : Max. pattern number SSET : Max. step number This is the maximum number of the Program Operation's pattern and step. At the time of delivery from the factory, it has been preset to " 10". Set this number depending on your target program. Set the Step's setting value so that the total number of each pattern may become less than 100. <Example> If you want to execute the Program Operation of 50 steps in 2 patterns, set the maximum pattern number (PSET) to "02" and the maximum step number (SSET) to "50". 11. Proportional Band When PID is activated, you can set the proportional band. Heating and heat release can be balanced. P1 : Low temp. proportional band P2 : Medium temp. proportional band P3 : High temp. proportional band 12. Integral Time It is possible to eliminate an offset (remaining deviation) that may occur by the proportional activation, I1 : Low temp. integral time I2 : Medium temp. integral time I3 : High temp. integral time 29

36 13. Differential Time Convergence of control is precipitated. D1 : Low temp. differential time D2 : Medium temp. differential time D3 : High temp. differential time 14. Protection of Settings User's settings can be protected from any possible mistakes in the default settings. This is preset to " 1" at the time of delivery from the factory. To change this setting, set it to Release from Protection of Settings " 0". " 0" : Release from Protection of Settings It is possible to change the user's default settings. " 1" : Protection of Settings It is not possible to change the user's default settings except (INLK). [Operation after the Recovery from Power Failure] Fixed Value Operation The operation mode is different depending on the "Stop Function" (page 29) of the user's default settings. RUN " 0" : Stop function is disabled. Temperature control resumes at the set temperature. RUN " 1" : Stop function is enabled. Operation comes into the status of stop. Program Operation The operation mode can be selected at "Activation after the Recovery from Power Failure" (page 15). POFF "STOP" : Operation comes into the status of stop.. POFF "CONT" : Program is resumed from the beginning of the step where power failure took place. POFF "REST" : Program is resumed from its own 1st step. In case there is power failure or power supply is shut off during the Fixed Value Operation or Program Operation, (POFF) and the temperature inside a chamber will be alternately displayed on the PV indicator when power supply resumes. When any key is pressed, (POFF) is released. 30

37 Check & Maintenance [Test of Overcurrent/Electric Leakage Breaker] CAUTION Run a check on the overcurrent/electric leakage breaker once a month. If there is any failure on this breaker, it may cause electric shock or fire. Check Overcurrent/electric leakage breaker Test button To check this breaker, press the Test button while the unit is in operation. If the breaker is tripped and turned off, it is normal. If it is not turned off by the above test, this breaker must be replaced with a new one. For its replacement, please contact us. [Test of Independent Overheat Protector] CAUTION Run a check on the independent overheat protector once a month. If there is any failure on this protector, it may cause fire or damage to your samples. Check Overheat protector To check this overheat protector, turn its dial toward the temperature lower than the temperature inside a chamber while the unit is in operation. If the operation stops, "HLT" is indicated on the PV indicator and the Alarm lamp lights up, it is normal. 31

38 [Care & Cleaning] CAUTION When you check or clean the unit, turn off the power switch and disconnect a power plug. Not observing this may cause electric shock. Do not splash water on the operation part of the unit. Not observing this may cause electric shock, electric leakage, fire or the unit's failure. Do not wipe the exterior part of the unit using any such organic solvent as alcohol, thinner or benzene. Not observing this may cause damage to the painted surface or accident. Unplug No water splash No organic solvent 1. Cleaning of shelves Wash the shelves using neutral detergent and then using clean water. Wipe them well using a soft cloth so that no detergent may remain and dry well. 2. Cleaning of chamber's inside For any dirty part inside a chamber, clean it using a soft cloth soaked with neutral detergent. After that, wipe it well using a dry cloth so that no detergent may remain. If you use the unit after the above cleaning, dry well the shelves as well as the chamber's inside before use. Neutral detergent 32

39 [Troubleshooting] Status Confirmation Countermeasure Check if the overcurrent/electric leakage breaker has been turned There is no indication on the off. operation panel. (Note) Check if the independent overheat protector has been tripped (The Alarm lamp is lighted). Check if the power is supplied to the unit at the rated voltage as specified and if its connection has There is no rise in temperature. There is too much rise in temperature. There is some unfamiliar indication on the temperature controller. No key operation is possible. It is not possible to change the user's default settings. been surely secured. Check if the setting temperature (shown on the SV indicator) is correct. Check if the self-diagnosis (page 34) is indicated or not. Check if any samples in a chamber have been heated up. Check if the setting temperature (shown on the SV indicator) is correct. Check if you have put too much samples in a chamber. Check if the user's default settings (page 24) are indicated. Check if the self-diagnosis (page 34) is indicated or not. Check if there is any other indication except the above. Check if the key lock is functioning. Check if the protection of settings is functioning. Remove the cause of problem and resume the operation. Remove the cause of problem and resume the operation. Secure the power supply at the rated voltage and resume the operation. Set the correct temperature. Refer to page 34 and operate. Remove the heated samples. Set the correct temperature. Secure 30% or more vacant space on the shelf when you put your samples and disperse them on the shelf. Refer to page 24 and operate. Refer to page 34 and operate. Turn off the unit once and turn on again. Refer to page 27 and release the key lock. Refer to page 30 and release the protection of settings. (Note) As one of the cause that there is no indication on the operation panel, there is a case that a fuse has blown. For this replacement of a fuse, please contact us. There may be a case that a sound is generated inside a chamber when the temperature rises. This is why stainless-steel parts inside a chamber are deformed by heat, and it does not give any effect on the operation's performance. 33

40 [Self-diagnostic Function] 1 2 Indication Error Content Cause & Countermeasure The temperature inside a chamber rises and exceeded the setting temperature + 10⁰C. The temperature inside a chamber rises and exceeded the setting temperature of the independent overheat protector. Check the temperatures that have been set on the user's default settings for the overheat alarm and the independent overheat protector. Check if there is any heated item inside a chamber. Secure appropriate vacant space when setting your samples. 3 A sensor wire is broken. 4 5 The measured temperature has become lower than the sensor's measuring range. A heater wire is broken. SSR's wire is broken. Check the connector and terminal. If there is no abnormal point, then a sensor is defective. Please contact us in this case. Check the lead wire and its terminal. If there is no abnormal point, then a heater or SSR is defective. Please contact us in this case. 6 SSR is short-circuited. SSR is defective. Please contact us The ambient temperature around the control unit rises. The Wait status takes place during the Program Operation, and the Wait monitoring time has elapsed. You run the program where the step has been set to "01". Wait until the ambient temperature around the control unit cools down. Check if the voltage of power supply is as per specified. Check if the running program is correct or not. Re-check your program. 10 The door is open. Close the door completely. If the above 1 to 8 self-diagnostic functions take place, the Alarm lamp lights up and the content of the relevant error will be indicated on the PV indicator. The heater's circuit is shut off in this case. Remove the cause of trouble and turn on the power switch again. Then, the self-diagnostic function in question will be released. If the above 9 self-diagnostic function takes place, the content of its error will be indicated on the PV indicator for certain time and released. If the above 10 self-diagnostic function takes place, the content of its error will be indicated on the PV indicator. After the cause of its error is removed, this error is released. After any error has been found by the self-diagnostic function, and if it is not released even after you took an action to remove the cause of trouble, please contact us. 34