VM-5 SERIES MONITOR. MODEL VM-5P3 Phase Marker Unit INSTRUCTION MANUAL

Transcription

1 MANUAL NO E2.0 Published in Dec.2000 Revised in Nov VM-5 SERIES MONITOR MODEL VM-5P3 Phase Marker Unit INSTRUCTION MANUAL

2 SAFETY CONVENTIONS VM-5P3 For safe operation... Thank you for using our VM-5 Series Monitor. SHINKAWA Sensor Technology applies strict quality control and inspections to ensure the high reliability of its products. This instruction manual contains descriptive information, specifications, and operating, setting, and adjusting procedures. Please study the contents of this manual and related manuals thoroughly before installing or operating the equipment, and keep it handy for future reference. "Safety Conventions" Please thoroughly study the following section entitled "Safety Conventions" before operating the equipment. The safety symbols explained in this section are placed outside the left margin next to the text to which they apply. This unit is designed for use by specialists or persons thoroughly familiar with the field. Make sure that the end user receives the Instruction Manual delivered with this unit. Before use... When the unit is received, inspect it for damage suffered in transport and check whether it is the item you ordered. In the unlikely event that it was damaged in transport or does not function according to specifications, please contact the SHINKAWA Office or the dealer nearest to you. Store the unit under the ambient conditions given in the specification. Avoid places where it is exposed to high humidity or corrosive gases. Storage.. In case the product needs to be stored temporarily for certain reasons after its acceptance at the site, store it in a warehouse with less humidity. Note that if stored in any of the following environments, its appearance and functions may deteriorate, and also its service life may shorten. (1) There is much dust. (2) There are corrosive gases (such as SO 2, H 2 S, etc.). (3) The product is exposed to vibration and/or shock. (4) The product is exposed to the direct sunshine and/or high temperature. (5) The product is exposed to water, steam and/or high humidity. i

3 SAFETY CONVENTIONS VM-5P3 Make it a rule to follow the instructions given in this manual. This manual contains important information designed to prevent personal injury and property damage, and ensure safe operation of the equipment. Familiarize yourself with the signs and symbols explained below before proceeding to read the manual, and observe the instructions given. Explanation of signs Symbols WARNING CAUTION Explanation Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to permit for property-damage-only accidents. "Serious injury" refers to such injuries as loss of eyesight, injuries, burns (due to heat or cold), electric shock, fractures, and poisoning, that have permanent after effects and require hospitalization or long-term outpatient treatment. "Moderate or minor injury" refers to such injuries as burns and electric shock that do not require hospitalization or long-term outpatient treatment. "Property-damage-only accidents" refers to consequential damage related to destruction of property and damage to the equipment. Explanation of symbols Symbols Explanation Indicates a prohibited action. Details are given in the text next to the symbol. Indicates a mandatory action. Details are given in the text next to the symbol. ii

4 SAFETY CONVENTIONS VM-5P3 To ensure safe use of this equipment, strictly observe the safety precautions provided in this manual, as well as installation methods and methods of use stipulated by laws and regulations. SHINKAWA Sensor Technology will not be liable for damage, etc. due to methods of use contravening to the instructions provided here. Safe use WARNING Connect earth wire PROHIBITION Make sure to ground. May cause electric shock or malfunction. Make sure to turn the power off before any wiring work. Will cause electric shock. CAUTION MANDATORY MANDATORY MANDATORY PROHIBITION PROHIBITION PROHIBITION PROHIBITION PROHIBITION PROHIBITION Connect the input signal within the voltage range described in the specification to the input terminals. Will cause damage and malfunction of the instrument. Install the monitor unit in the desired location in the instrument rack. Will cause damage to the instrument and malfunction of the turbine monitoring system. A printed circuit board and electronic products may receive damage with the static electricity of a human body. Touch the metal part once and discharge your static electricity before dealing with it. Will cause damage and malfunction of the instrument. Do not touch parts and soldered surfaces of the monitor unit. Will cause damage and malfunction of the instrument. The monitor unit is a precision instrument. Take care not to expose it to excessive shock or vibration. Do not change the parameter settings during operation. May cause unexpected alarm output. Do not pull out the face plate during operation. Will cause damage to the instrument and malfunction of the turbine monitoring system. Do not measure insulation resistance and dielectric strength other than those at places specified. Will cause damage to the instrument. Do not remodel this monitor unit without permission. Otherwise the guarantee can not be made. iii

5 SAFETY CONVENTIONS VM-5P3 EMC(Electro-magnetic compatibility) The EMC of each VM-5 Series monitor is evaluated by various noise tests. However, its characteristics may vary with on environmental conditions such as the magnitude of noise, ambient temperature, humidity and the arrangement of equipment. For the above reason, when operating the monitor, please observe the following CAUTION. CAUTION MANDATORY MANDATORY MANDATORY MANDATORY MANDATORY PROHIBITION The unit should be operated by specialists or personnel who have knowledge of it. When a shielded cable is used, the length of the unshielded cable section should be less than 100mm. (3.937in REF.). For each relay used near this unit, devices related to this unit or signal cables connecting the unit and these devices, install a surge killer. Firmly tighten each screw used for mounting each unit. In additional, always close the face plate for the unit, then fix it with knurled screws. In order to prevent the system from its malfunction when the unit fails, provide the systematic interlock function. Do not wire input signal cables in parallel with control and power cables. It is recommended that separated wire ducts be used for these cables. Do not use any radio equipment near the unit. PROHIBITION Noise filter Noise transmitted through each cable may be rejected to some extent by inserting a ferrite core in the cable (note 1). If the cable passes through noisy surroundings, it is recommended that such a noise prevention device is used. (note 1) ZCAT : TDK iv

6 TABLE OF CONTENTS VM-5P3 1. GENERAL INFORMATION 1-1 OVERVIEW SPECIFICATIONS 2-1 SPECIFICATIONS OUTLINE DRAWING 3-1 OUTLINE DRAWING INTERCONNECTION 4-1 INTRINSIC SAFETY EXPLOSION-PROOF CONSTRUCTION NON-INTRINSIC SAFETY EXPLOSION-PROOF CONSTRUCTION OK ALARM CONTACT OUTPUT WIRING INTERCONNECTION OF BUFFER OUTPUT DESCRIPTION OF FUNCTIONS 5-1 DISPLAY OK (INPUT ABNORMAL) ALARM OK ALARM RELAY MODE OK ALARM RESET MODE MONITOR OUTPUT PULSE OUTPUT TRIGGER FUNCTION SELF-DIAGNOSTIC FUNCTION DESCRIPTION OF PARTS 6-1 NAME OF PARTS DESCRIPTION OF PARTS v

7 TABLE OF CONTENTS VM-5P3 7. BLOCK DIAGRAM 7-1 BLOCK DIAGRAM FUNCTIONAL BLOCK DESCRIPTION OPERATING METHOD 8-1 WITHDRAWAL OF UNIT CHECKING THE SETTING SETTING THE PHASE MARKER ALARM RESET MODE SETTING ALARM RELAY MODE SETTING SETTING ABNORMAL INPUT ALARM FUNCTION ON/OFF MAINTENANCE 9-1 RECOMMENDED MAINTENANCE EQUIPMENT CHECKING THE OPERATION OF MONITOR OUTPUT OR PULSE OUTPUT CHECKING THE OPERATION OF THE INPUT ABNORMAL ALARM REPLACEMENT OF ALUMINUM ELECTROLYTIC CAPACITOR TROUBLESHOOTING vi

8 1. GENERAL INFORMATION VM-5P3 1-1 OVERVIEW The VM-5P3 Phase Marker Unit combined with the VM-5H3 or VM-5W1 Instrument Rack conducts waveform shaping of the phase marker signal and also monitors the OK alarm contact output and abnormal internal power supply voltage for each rack. In addition, the abnormal phase marker signal input can be detected by its setting to be able to be output as the OK signal. Also carefully read the instruction manuals for the VM-5H3, VM-5W1 Instrument Racks, and for the respective transducer used. Caution Test of cables using megger (insulation test): Before conducting an insulation test of cables using a megger, always disconnect these cables from the instrument. Also when connecting them to the instrument after the test, always short these cables once to discharge charged electrons, then connect them to the instrument. The instrument may be damaged if connected with the cables charged with electrons. Caution This unit is not intended for use as a single unit and, therefore, does not match the VM-5G Single Unit Instrument Rack. Caution This unit is not provided with the communication function. -1-

9 2. SPECIFICATIONS VM-5P3 2-1 SPECIFICATIONS No entry if additional Model Code / Additional Spec. Code( spec. code is not specified. ) VM-5P /TRP/CEM Serial interface Input signal Hysteresis set value Hysteresis set value (shaped waveform circuit) (shaped waveform circuit) (CH1) (CH2) Alarm reset system OK Relay mode system OK Trigger mode NORMALLY DE-ENERGIZED 1 Manual NORMALLY ENERGIZED 3 Not provided 1 VK,RD,FK Series 0 1.0V 0 1.0V 0 AUTO-RESET 0 Auto V 1 0.1V 1 SELF-HOLD 2 0.2V 2 0.2V V 3 0.5V Tropical spec. CE marking DIMENSION OF TARGET(Model VK,RD,FK) CAUTION) To detect a projection(gear),provide surface A of the projection with a concentric curve. Do not make it flat. VK-202A VK-452A Input RD-05A VK-302P FK-452F FK-202F A= mm A Dimension of target B= mm [recommended] B C C= mm (mm) D D= mm POWER SUPPLY PHASE MARKER SIGNAL INPUT VOLTAGE BUFFER OUTPUT PULSE OUTPUT Ordering Information Set gap [recommended](mm) Standard Specifications D Supplied from instrument rack (VM-5H3 or VM-5W1) Phase marker : 2ch Max. Input impedance : Approx.10kΩ 0 to 25VDC Phase marker signal : 2ch Output voltage : -1 to 20VDC Output impedance : 50Ω Shaped pulse signal is output via a buffer amplifier. Signal level : -1 to +1V(PL), 4 to 6V(PH) Output impedance : 50Ω A C 1.0 to to to 1.5 D B C ABNORMAL INPUT ALARM FUNCTION SETUP TRANSDUCER POWER SUPPLY POWER SUPPLY OK INDICATOR SEQUENCE STATE INDICATOR Standard Specifications ON(enabled) or OFF(disabled) Preset to OFF(disabled) (Can be changed using the internal jumper) -24VDC±1V, 20mA PWR SUPPLY OK : (green LED) SEQUENCE ENABLE : (yellow LED) TRIGGER INDICATOR TRIGGER : (yellow LED) TEMPERATURE Operating temperature : 0 to 65 C (32 to 149 F REF.) RANGE Storage temperature : -30 to +85 C (-22 to +185 F REF.) Relative humidity : 20 to 95%RH (noncondensing) FINISH Face plate : Munsell N-4.0 (equiv.) MASS Unit : max.0.6kg (max.1.4lb REF.) OTHER Note) Model VM-5P3 Phase marker unit can be installed on 1 unit(vm-5p3)/1 rack(vm-5h3 or VM-5W1 Instrument Rack), can not be installed on Model VM-5G Single Unit Instrument Rack. The system OK alarm contacts on the instrument rack are not functional unless the VM-5P3 is mounted. Alarm contact operation Monitor alarm relay mode Monitor power OFF Monitor power ON Normal state Alarm state NO contact NORMALLY DE-ENERGIZED OPEN OPEN CLOSE NO contact NORMALLY ENERGIZED OPEN CLOSE OPEN NC contact NORMALLY DE-ENERGIZED CLOSE CLOSE OPEN NC contact NORMALLY ENERGIZED CLOSE OPEN CLOSE E1.5

10 3. OUTLINE DRAWING VM-5P3 3-1 OUTLINE DRAWING No. Name 1 PULSE OUTPUT (1CH) 2 MONITOR OUTPUT (1CH) 3 PULSE OUTPUT (2CH) 4 MONITOR OUTPUT (2CH) 5 SEQUENCE enable indicator 6 Power for indicator 7 TRIGGER indicator (1CH) 8 TRIGGER adjuster (1CH) 9 TRIGGER set value check terminal (1CH) 10 TRIGGER indicator (2CH) 11 TRIGGER adjuster (2CH) 12 TRIGGER set value check terminal (2CH) Finish: Face plate Munsell N-4.0 (equiv.) Mass: Max.0.6kg (Max. 1.4lb REF.) Unless otherwise specified, units are in millimeters (mm) and grams (g). Reference dimensions in parentheses are in inches (in) and pounds (lb). -3-

11 4. INTERCONNECTION VM-5P3 Prohibition Do not use the blank terminals. For interconnection between the transducer and monitor, make sure to use 3-core shielded cables or pair shielded standard 3-wire instrument cables, since the signal transmitted is weak. (Do not use unshielded cables or non-pair shielded multicore cables as the measured values could be affected by external noise.) Recommended cables Cable Recommended Note CVVS (3-core shielded cable) Conduit Pipe Shielded wire INSTRUMENT CABLE (Pair shielded standard 3-wire) Conduit Pipe Outside shielded Shielded wire Excellent Good Recommended cabling as per API st d 670 Normal: Silver-plated braid Recommended: Copper tape shielded (Core wire: Soft copper wire) Use conduit pipe (cable rack) for wiring. Although vibration and displacement signals can be transmitted in one instrument cable, use separate cables, because a high vibration signal exerts injurious influence over other displacement and vibration signals. Recommended: Outside shield of aluminum or copper tape. Provide separate cabling for pulse signals (phase marker, revolution) and for displacement and vibration signals. Avoid running signal transmission cables together with control and power cables. Install all cables in conduit pipes or on cable racks. -4-

12 4. INTERCONNECTION VM-5P3 4-1 INTRINSIC SAFETY EXPLOSION-PROOF CONSTRUCTION Safety Barrier Terminals Monitor Terminals Signal name Wire no. Hazardous area Safe area 1ch 2ch No. No. Terminal name No. Terminal name No. Output A 4 2 IN A1 IN B1 Common, Shield B, D Earth Earth COM A2 COM B2 Power C 3 1 PWR A3 PWR B3-5-

13 4. INTERCONNECTION VM-5P3 Mandantory Be sure to observe the following cautions at the time of interconnection. Note No. in drawing 1) 2) 3) 4) 5) Caution Use flexible armored cables as sensor cables and extension cables, unless these cables are not at risk for damage. Allowable bending radius Without armor : 30 mm (1.18 in REF.) With armor : 50 mm (1.97 in REF.) Allowable tension : 98.1N (10 kgf REF.) To insulate the connector, cover it with the supplied shrink tube (insulating sleeve) or insulating tape. Take measures to prevent oil or water from entering the insulating sleeve or tape. Make sure to fix the terminal cover on the terminal block of the VK driver. Install the driver in the driver housing and fix the cable securely with a clamp near the terminal block. Isolate the driver with an insulator. Shorten the unshielded section (connected section) as much as possible. (Recommended length : Less than 100mm(3.937 in REF.)) Connect the shielded wires to the COM terminal. Use a 3-core shielded cable with AWG No. 14 to No. 18 gage stranded conductors for wiring between the VK driver and the safety barrier, and between the safety barrier and the monitor. In addition, as the length of each cable is subject to restrictions, select it as instructed in the dedicated wiring diagram or the instruction manual for the driver. Do not put the cable in the same duct accommodated with high-voltage distribution cables, or do not mix it with power or control cables. 6) Install the safety barrier in the enclosure. 7) For the safety barrier, conduct the following grounding. Ground resistance : Less than 10Ω Grounding wire : To be grounded separately from other wiring Warning Make sure to turn the power off before wiring work to prevent accidents due to electric shock. Do not conduct wiring while the machine is under operation. Pay attention to sensor sensitivity. If connection is conducted as instructed in this connection diagram, the monitor input (voltage) may drop about 1% by the resistance of safety barrier. -6-

14 4. INTERCONNECTION VM-5P3 4-2 NON-INTRINSIC SAFETY EXPLOSION-PROOF CONSTRUCTION Connected terminals Signal name Wire No. 1CH 2CH Terminal name Terminal No. Terminal name Terminal No. Output A IN A-IN IN B-IN Common, Shield B, D COM A-COM COM B-COM Power C PWR A-PWR PWR B-PWR -7-

15 4. INTERCONNECTION VM-5P3 Mandantory Be sure to observe the following cautions at the time of interconnection. Note No. in drawing 1) 2) Caution Use flexible armored cables as sensor cables and extension cables, unless these cables are not at risk for damage. Allowable bending radius Without armor : 30 mm (1.18 in REF.) With armor : 50 mm (1.97 in REF.) Allowable tension : 98.1N (10 kgf REF.) To insulate the connector, cover it with the supplied shrink tube (insulating sleeve) or insulating tape. Take measures to prevent oil or water from entering the insulating sleeve or tape. 3) Isolate the driver with an insulator. 4) 5) Shorten the unshielded section (connected section) as much as possible. (Recommended length : Less than 100mm(3.937 in REF.)) Connect the shielded wires to the COM terminal. Use a 3-core shielded cable with AWG No. 14 to No. 18 gage stranded conductors for wiring between the VK driver and the monitor. Do not put the cable in the same duct accommodated with high-voltage distribution cables, or do not mix it with power or control cables. Warning Make sure to turn the power off before wiring work to prevent accidents due to electric shock. Do not conduct wiring while the machine is under operation. -8-

16 4. INTERCONNECTION VM-5P3 4-3 OK ALARM CONTACT OUTPUT WIRING Warning Caution Beware of electric shock from high-voltage parts. Do not exceed the allowable contact capacity of the alarm contacts. NC contact output NO contact output Alarm contact output N.C OK N.O BUF COM SEQ COM FLT COM RES VM-5P3 Input/output terminal block The OK alarm contacts are not functional unless the VM-5P3 is mounted. Caution -9-

17 4. INTERCONNECTION VM-5P3 4-4 INTERCONNECTION OF BUFFER OUTPUT Make sure to insulate the buffer output against earth. If not insulated, a 2-point earth system results, which may cause noise interference. SERIAL INTERFACE IN OUT ENBL DAN.BYPS DISABL A B IN IN CH1 Buffer output COM PWR BUF COM PWR BUF CH2 Buffer output COM COM N.C VM-5P3 Input/output terminal block -10-

18 5. DESCRIPTION OF FUNCTION VM-5P3 5-1 DISPLAY POWER SUPPLY OK INDICATOR (GREEN) Usually, is being lit. Flashes when the internal power supply voltage supplied from the power unit becomes abnormal, but goes off at a power supply voltage of +5V. Also goes off if the power is not supplied to the instrument rack (power supply unit) SEQUENCE INDICATOR (YELLOW) Lit when the sequence (option filter on occasion) is enabled TRIGGER INDICATOR (YELLOW) Lit while the phase marker signal is being waveform-shaped. May flash or flicker depending on the frequency of the input signal, but this is not abnormal. Therefore use the unit as usual. 5-2 OK (INPUT ABNORMAL) ALARM DESCRIPTION OF FUNCTION The VM-5P3 Phase Marker Unit, when it detects the OK alarm raised by each monitor unit housed in the same instrument rack, the abnormal internal power supply voltage supplied from the power supply unit or the abnormal input voltage of the phase marker signal (monitoring of the input voltage of the phase marker signal can be made enabled by the setting) is detected, can perform their OR logic operation to output a typical contact signal. In addition, if the internal power supply voltage supplied from the power supply unit becomes faulty, the contact signal is output and also the power supply OK indicator on the face plate is made flashing or going off. Warning It is recommended that the alarm contact output be normally energized (de-energized alarm). The relay may not be able to be energized when the internal power supply becomes abnormal. -11-

19 5. DESCRIPTION OF FUNCTION VM-5P OK ALARM OUTPUT ITEM MATRIX Divided Details When the OK alarm is being raised even if the number of Monitor unit abnormal monitor units housed in the same instrument rack is one. +5V Voltage decrease in power supply (alarm is raised at less than +4.6V) +17V Voltage decrease in power supply (alarm is raised at less than +12V) Internal power supply voltage +24V Voltage decrease in power supply supplied from power supply (alarm is raised at less than +19V) unit is abnormal. -17V Voltage increase in power supply (alarm is raised at less than -12V) -30V Voltage increase in power supply (alarm is raised at less than -19V) VK Transducer abnormal (Input voltage : more than -1.4V) Sensor is shorted. Extension cable is shorted. Sensor set gap is too small. Signal cable is shorted or disconnected between transducer and monitor. Phase marker signal abnormal FK Driver, RD Transducer abnormal (Input voltage : more than -1.4V) Sensor is shorted or disconnected. Extension cable is shorted or disconnected. Sensor set gap is too small. Signal cable is shorted or disconnected between transducer and monitor. It is recommended that an FK driver, RD tacho-driver be used as a phase marker transducer. 5-3 OK ALARM RELAY MODE Each OK alarm contact can be set to either normally de-energized or normally energized. For details refer to 8. OPERATING METHOD. OK Alarm contact operation Monitor power Monitor power ON OFF Normal state Alarm state NO contact NORMALLY DE-ENERGIZED OPEN OPEN CLOSE NO contact NORMALLY ENERGIZED OPEN CLOSE OPEN NC contact NORMALLY DE-ENERGIZED CLOSE CLOSE OPEN NC contact NORMALLY ENERGIZED CLOSE OPEN CLOSE -12-

20 5. DESCRIPTION OF FUNCTION VM-5P3 5-4 OK ALARM RESET MODE The automatic reset function that automatically releases the alarm condition if the input signal and internal power supply voltage has returned to normal, or self-holding function that holds the alarm condition until reset by shorting between the RES and COM terminals, can be set. For details refer to 8. OPERATION METHOD. The alarm cannot be reset when the input reaches the alarm level. Caution 5-5 MONITOR OUTPUT For signal analysis, the input signal is output via a buffer amplifier to the BNC connector at the front. The monitor output signal is not isolated from the input signal. 5-6 PULSE OUTPUT The input signal is waveform-shaped via the buffer amplifier for trigger state checking and revolution signal to be output to the BNC connector at the front. The pulse output signal is not isolated from the input signal. 5-7 TRIGGER VOLTAGE OUTPUT Threshold signal (trigger voltage) is output when the phase marker signal is waveform-shaped. This signal is suitable for such a pin which is sharp at the point such as a circuit tester probe. (Applicable insertion pin: 2.0ø) The trigger voltage output signal is not isolated from the input signal. 5-8 SELF-DIAGNOSTIC FUNCTION This is the function of detecting failure occurring in the input line such as sensor disconnection or the imperfect contact of the connector. If any failure is detected, the OK alarm contact is output and also the OK lamp flashes. This function is made enabled by setting the internal jumper. For details refer to 8. OPERATION METHOD. -13-

21 6. DESCRIPTION OF PARTS VM-5P3 6-1 NAME OF PARTS No. Name 1 PULSE OUTPUT (1CH) 2 MONITOR OUTPUT (1CH) 3 PULSE OUTPUT (2CH) 4 MONITOR OUTPUT (2CH) 5 SEQUENCE enable indicator 6 Power for indicator 7 TRIGGER indicator (1CH) 8 TRIGGER adjuster (1CH) 9 TRIGGER set value check terminal (1CH) 10 TRIGGER indicator (2CH) 11 TRIGGER adjuster (2CH) 12 TRIGGER set value check terminal (2CH) -14-

22 6. DESCRIPTION OF PARTS VM-5P3 6-2 DESCRIPTION OF PARTS 1 PULSE OUTPUT (1CH) BNC connector which outputs, via the buffer amplifier, the signal (pulse output) obtained after the input signal on the 1CH side is waveform-shaped. Make sure to insulate the pulse output against earth. If not insulated, a 2-point earth system results, which may cause noise interference. 2 MONITOR OUTPUT (1CH) BNC connector which outputs the input signal (monitor output) on the 1CH side via the buffer amplifier. Make sure to insulate the monitor output against earth. If not insulated, a 2-point earth system results, which may cause noise interference. 3 PULSE OUTPUT (2CH) BNC connector which outputs, via the buffer amplifier, the signal (pulse output) obtained after the input signal on the 2CH side is waveform-shaped. Make sure to insulate the pulse output against earth. If not insulated, a 2-point earth system results, which may cause noise interference. 4 MONITOR OUTPU (2CH) BNC connector which outputs the input signal (monitor output) on the 2CH side via the buffer amplifier. Make sure to insulate the monitor output against earth. If not insulated, a 2-point earth system results, which may cause noise interference. 5 SEQUENCE enable indicator Lit when the sequence (optional filter on occasion) is enabled. 6 POWER for indicator Lit while the power is being supplied to the unit. In addition, flashes when the internal power supply voltage becomes abnormal. However, may go off when a power supply voltage of +5V which is one of the internal power supply voltages decreases. -15-

23 6. DESCRIPTION OF PARTS VM-5P3 7 TRIGGER indicator (1CH) Flashes or is lit when the input signal on the 1CH side is waveform-shaped and as a result the pulse signal is being output. 8 TRIGGER adjuster (1CH) TRIGGER voltage adjuster on the 1CH side. This adjuster becomes valid in manual trigger mode. 9 TRIGGER set value check terminal (1CH) Terminal to output the trigger set value voltage on the 1CH side. Make sure to insulate the trigger output against earth. If not insulated, a 2-point earth system results, which may cause noise interference. Caution There may be a case where the correct set value is not output. As the trigger set value voltage in manual mode is always output from the TRIGGER set value check terminal, this output may not be the correct set value with the trigger mode set to the auto-trigger mode. 10 TRIGGER indicator (2CH) Flashes or is lit when the input signal on the 2CH side is waveform-shaped and as a result the pulse signal is being output. 11 TRIGGER adjuster (2CH) TRIGGER voltage adjuster on the 2CH side. This adjuster becomes valid in manual trigger mode. 12 TRIGGER set value check terminal (2CH) Terminal to output the trigger set value voltage on the 2CH side. Make sure to insulate the trigger output against earth. If not insulated, a 2-point earth system results, which may cause noise interference. Caution There may be a case where the correct set value is not output. As the trigger set value voltage in manual mode is always output from the TRIGGER set value check terminal, this output may not be the correct set value with the trigger mode set to the auto-trigger mode. -16-

24 7. BLOCK DIAGRAM VM-5P3 7-1 BLOCK DIAGRAM -17-

25 7. BLOCK DIAGRAM VM-5P3 7-2 FUNCTIONAL BLOCK DESCRIPTION 1 Input amplifier The input signal is converted to a signal level appropriate to the internal circuit. Simultaneously, a low pass filter is incorporated to reject excessive high-frequency components. 2 Output amplifier Buffer amplifier for monitor output/pulse output from the BNC connector on the monitor front panel and to the terminal block on the rear panel. 3 Waveform shaping circuit The phase marker signal is waveform-shaped at the specified trigger level, then is output to the digital circuit. 4 Pulse polarity selector switch jumper switch to select the polarity of the pulse output corresponding to the input signal. 5 TRIGGER level adjuster Adjuster to set the trigger level voltage when the trigger mode is set to the manual trigger mode. This adjuster can be adjusted from the through hole in the front panel. 6 Reset circuit Circuit to hold the alarm state of the alarm contact output until the RES terminal is shorted with the COM terminal on the instrument rack even when the input signal and internal power supply voltage return to normal. This mode can be changed to the mode which immediately releases the alarm by the setting after their return to normal. -18-

26 8. OPERATING METHOD VM-5P3 8-1 WITHDRAWAL OF UNIT As the used to set the specification are located on the main board of the unit, it is necessary to pull out the unit when changing the specification. When puling out the unit, follow the procedure described below and observe precautions so as not to cause any accident when conducting this work. 1 Evenly loosen the screw at the top and bottom of face plate. Carefully handle the screws. Warning As they are easily dislocated fro the face plated, carefully handle them not to drop or lose. 2 Pull out the unit. As the unit is connected with the instrument rack via the connector, resistance to some degree may be met when withdrawing the unit. Do not touch the printed circuit board and electronic parts of this unit. Prohibition Will cause damage and malfunctioning of the instrument. Do not pull out the unit with the power turned on. Caution Will cause damage and malfunctioning of the instrument. 3 As the switch are located on the main board, operate these switches as instructed in the succeeding sections. 4 After the setting is finished, return the unit to its original position. Close the face plate in reverse order of opening the unit. Always secure the face plate with the screws attached. Otherwise, the unit may be affected by noise or result in imperfect connection. 8-2 CHECKING THE SETTING The specifications thus set are classified into those which can be checked from the condition of each switch with the unit pulled out from the instrument rack. Observe precautions so as not to get into danger when conducting this work. Checking method First, withdraw the unit in accordance with item 8-1 WITHDRAWAL OF UNIT and then refer to item CHECKING THE SWITCH. Details of setting Trigger mode selection Wave form shaping hysteresis setting Pulse signal polarity selection Alarm reset selection Alarm relay mode selection Selection of abnormal input alarm function ON/OFF -19-

27 8. OPERATING METHOD VM-5P CHECKING THE SWITCH In order to check the switch setting on the board, it is necessary to pull out the unit from the instrument rack. Withdraw the unit in accordance with item 8-1 WITHDRAWAL OF UNIT. Do not pull out the face plate during operation. Prohibition Will cause damage and malfunctioning of the instrument. Part No. Parameter Schematic diagram AUTO MAN Set status Auto-trigger mode is selected with the switch lever turned to the AUTO side. SW1A 1CH TRIGGER mode selection SW1A AUTO MAN Manual-trigger mode is selected with the switch lever turned to the MAN side. SW1A AUTO MAN Auto-trigger mode is selected with the switch lever turned to the AUTO side. SW1B 2CH TRIGGER mode selection SW1B AUTO MAN Manual-trigger mode is selected with the switch lever turned to the MAN side. SW1B J1A Waveform shaping hysteresis is set to 0.1V with the short pin located at J1A 1CH Waveform shaping hysteresis selection J1A J1A Waveform shaping hysteresis is set to 0.2V with the short pin located at 0.2. Waveform shaping hysteresis is set to 0.5V with the short pin located at J1A Waveform shaping hysteresis is set to 1.0V with the short pin located at

28 8. OPERATING METHOD VM-5P3 Part No. Parameter Schematic diagram J1B Set status Waveform shaping hysteresis is set to 0.1V with the short pin located at J1B 2CH Waveform shaping hysteresis selection J1B J1B Waveform shaping hysteresis is set to 0.2V with the short pin located at 0.2. Waveform shaping hysteresis is set to 0.5V with the short pin located at J1B Waveform shaping hysteresis is set to 1.0V with the short pin located at 1.0. J2A J2B J3C J1C 1CH Pulse signal polarity selection 2CH Pulse signal polarity selection Alarm reset selection Alarm relay mode selection J2A J2A J2B J2B J3C J3C J1C DE- EN. EN. J1C DE- EN. EN. Pulse output is set to the low level (0V) if the absolute input signal exceeds the absolute trigger level with the short pin shoring between Nos. 1 and 2. Pulse output is set to the high level (+5V) if the absolute input signal exceeds the absolute trigger level with the short pin shoring between Nos. 2 and 3. Pulse output is set to the low level (0V) if the absolute input signal exceeds the absolute trigger level with the short pin shoring between Nos. 1 and 2. Pulse output is set to the high level (+5V) if the absolute input signal exceeds the absolute trigger level with the short pin shoring between Nos. 2 and 3. OK alarm contact output is set to the self-hold mode with the short pin shorting between Nos. 1 and 2. OK alarm contact output is set to the auto-reset mode with the short pin shorting between Nos. 2 and 3. Alarm relay mode is set to the de-energized with the short pin shorting the DE-EN. side. Alarm relay mode is set to the energized with the short pin shorting the EN. side. -21-

29 8. OPERATING METHOD VM-5P3 Part No. J4A J4B Parameter 1CH selection of abnormal input alarm function ON/OFF. 2CH selection of abnormal input alarm function ON/OFF. Schematic diagram J4A OFF ON J4A OFF ON J4B OFF ON J4B OFF ON Set status No OK alarm contact is output even when the input on the 1CH side becomes abnormal with the short pin shorting the OFF side. The OK alarm contact is output when the input on the 1CH side becomes abnormal with the short pin shorting the ON side. No OK alarm contact is output even when the input on the 2CH side becomes abnormal with the short pin shorting the OFF side. The OK alarm contact is output when the input on the 2CH side becomes abnormal with the short pin shorting the ON side. -22-

30 8. OPERATING METHOD VM-5P3 8-3 SETTING THE PHASE MARKER PHASE MARKER The VM-5P3 phase marker unit can input a reference signal of 1 pulse/revolution which is output from the VK driver or RD tacho-driver and also output the signal to the outside after being waveform-shaped. The phase marker essential to fully utilize this function is described in the following step by step. (1) Shape of projection or key way for detecting revolutions The requirements for the shape of a target (projection or key way) necessary for detecting revolutions are described. Thus, capture the phase marker signal without fail. (2) Describing the trigger mode This section describes how to use the auto-trigger mode or the manual trigger mode. (3) Setting the trigger mode This section describes how to set the auto-trigger mode or the manual trigger mode. (4) Selecting the polarity of the output pulse This section describes the polarity of the output pulse corresponding to an input signal change and also how to change the polarity. (5) Setting the waveform shaping hysteresis A method of setting the hysteresis at the time of waveform shaping is described. (6) Determining the trigger level A method of how to determine the trigger level which is most appropriate to operation is described. (7) Setting the trigger level A method of setting the waveform shaped trigger level of the phase marker signal is described. -23-

31 8. OPERATING METHOD VM-5P SHAPE OF PROJECTION OR KEY WAY In order to obtain the pulse input signal (one pulse / revolution) corresponding to revolutions from the sensor, a projection on or key way in the shaft is required. Note that no appropriate trigger pulse is generated, causing malfunction depending of the shape of this target for detecting the revolution signal. In the following, assuming that the signal of the RD-05A Tacho driver or VK-202A is input, sizes of the target which can correctly detect the number of revolutions even when the gap changes due to the deflection or vibration of the shaft is shown. (1) Projection D A C To detect a projection (gear), provide surface A of the projection with a concentric curve. Do not make it flat. Otherwise malfunction caused by abnormal waveforms may result. (2) Key groove D B C (4) Target for rotor speed detection RD-05A Input VK-202A mm in A Dimension of target B [Recommended] C D Set gap [Recommended] to to

32 8. OPERATING METHOD VM-5P3 When the target shifts in the axial direction caused by differential expansion, add the amount of target shift to the D value to consider so that the target surface is not dislocated from the sensor. As a method of machining a circular projection on or a circular hole in the shaft may easily cause a measurement error resulting from a pitch error, the eccentricity or vibration of the shaft, or the displacement of the shaft in the axial direction, do not use this method for a target for detecting revolutions. Install the sensor so that it is located at the center of the target width direction. Make adjustment so that one pulse/revolution is always output TRIGGER MODE SELECTION (1) Auto trigger mode (prior to shipment) In Auto Trigger mode, the optimum trigger level for the input waveform is set automatically. If the unit is used under the condition of satisfying all of the following 3 requirements, the auto-trigger mode can used. When used at a pulse output of more than 600rpm. When the revolution detection target satisfies the shapes recommended in item SHAPE OF PROJECTION OR KEY WAY. When the input duty ratio is between 10 and 90%. Duty ratio Duty ratio=a/(circumference of circle with radius r) 100 A A r r (2) Manual trigger mode The trigger level can be set manually. If any one of the following 3 requirements is satisfied, select the manual trigger mode. When used at a pulse output of less than 600rpm. When the revolution detection target does not satisfies the shapes recommended in item SHAPE OF PROJECTION OR KEY WAY. When the input duty ratio is between 10 and 90%. -25-

33 8. OPERATING METHOD VM-5P SETTING THE TRIGGER MODE (1) Remove the unit from the rack. Prohibition Caution Do not pull out the face plate during operation. Will cause damage and malfunctioning of the instrument. Do not pull out the unit with the power turned on. Will cause damage and malfunctioning of the instrument. (2) Switches for setting the trigger mode (SW1A, SW1B) are located on the main board. The unit is set to the manual trigger mode with the switch lever moved to MAN or to the auto-trigger mode with the switch lever moved to AUTO. For checking, see item CHECKING THE SWITCH. SW1A SW1B Do not touch any points other than those specified. (3) After verifying the trigger mode selected, reinstall the unit in the rack. Always secure the face plate with the screws attached. Otherwise, the unit may be affected by noise or result in imperfect connection. -26-

34 8. OPERATING METHOD VM-5P SELECTING THE POLARITY OF THE OUTPUT PULSE It is possible to select whether the voltage of the pulse output is set to the High level (+5V) or on the contrary to the Low level (0V) when the absolute input signal exceeds the trigger level by changing the jumper switch setting. The following diagram shows the case where the voltage of the pulse output is set to the High level (+5V) when the absolute input signal exceeds the trigger level. V Input signal waveform Trigger level High (5V) Low (0V) Pulse output waveform Time (t) Time (t) (1) Remove the unit from the rack. Prohibition Caution Do not pull out the face plate during operation. Will cause damage and malfunctioning of the instrument. Do not pull out the unit with the power turned on. Will cause damage and malfunctioning of the instrument. (2) There are the trigger mode selector switches (J2A and J2B) on the main board. The voltage of the pulse output is set to the Low level (0V) when the absolute input signal exceeds the trigger level with the jumper shorting between Nos. 1 and 2. J2A J2B Do not touch any points other than those specified. (3) First, check the polarity thus selected, and then house the unit in the instrument rack. Always secure the face plate with the screws attached. Otherwise, the unit may be affected by noise or result in imperfect connection. -27-

35 8. OPERATING METHOD VM-5P SETTING THE WAVEFORM SHAPING HYSTERESIS Determination of hysteresis Any one of 0.1V, 0.2V, 0.5V and 1V can be selected by the switch on the board. But may have to be changed if any of the following conditions apply. The input signal level from the sensor (minimum level over the full speed range) is lower than 3Vpk-pk. The internal noise of the input signal from the sensor (maximum level over the full speed range) is higher than 0.1Vpk-pk. Setting conditions If you have to set the hysteresis, make sure that the following conditions are met. Otherwise correct measurement is not possible. Input waveform B : Max. internal noise value A : Min. value of input signal Condition(1) A - (hysteresis set value) >2V Condition(2) (hysteresis set value) - B > 0.5V If these conditions cannot be met, the following measures must be taken. To meet condition (1) Select a narrow set gap and a high input signal amplitude. Select a larger shaped speed detection target and a high input signal amplitude. To meet condition (2) Take measures against noise to reduce the internal noise level. The higher the values in conditions (1) and (2), the higher the measuring stability. We recommended that you make the values as high as possible. -28-

36 8. OPERATING METHOD VM-5P HYSTERESIS SETTING (1) Remove the unit from the instrument rack. Prohibition Caution Do not pull out the face plate during operation. Will cause damage and malfunctioning of the instrument. Do not pull out the unit with the power turned on. Will cause damage and malfunctioning of the instrument. (2) There is the waveform shaping hysteresis setting jumper (J1A, J1B) on the main board. With 0.1 shorted with a jumper pin, the hysteresis is set to 0.1V. Similarly, with 0.2, 0.5 or 1.0 shorted with the jumper pin, the hysteresis is set to 0.2V, 0.5V or 1.0V, respectively. For details, see Checking the switch. J1A J1B Do not touch any points other than those specified. (3) Check the trigger mode selected, then mount the unit on the instrument rack. Always secure the face plate with the screws attached. Otherwise, the unit may be affected by noise or result in imperfect connection. -29-

37 8. OPERATING METHOD VM-5P DETERMINING THE TRIGGER LEVEL (1) Check the contents of item from item (2) Warm up the unit for more than 15 minutes after turning on the power supply. (3) Connect an oscilloscope to the monitor output terminals (BNC connector) at the front of the unit. VM-5P3 Oscilloscope (4) Record the monitor output waveform over the full speed range. The input waveform may deteriorate in the high speed range due to the influence of variations of the set gap and frequency characteristic of the transducer, etc. Therefore, make sure to record the waveform over the full speed range. (5) Determine the optimum trigger level value from the recorded waveform. When the phase marker signal (output from MON ) is as shown in the following, the optimum trigger level becomes as shown by a chained line. At this time also check that the waveform shaped output signal (output from PLS is correctly output. Phase marker signal voltage Proper trigger -20V Low speed Medium speed High speed 0V Waveform shaped output signal voltage 5V Low speed Medium speed High speed 0V -30-

38 8. OPERATING METHOD VM-5P TRIGGER LEVEL SETTING Caution Only when set to the manual trigger mode, the trigger level can be changed. The voltage to indicate the trigger level is output from the TRIGGER set value check terminal on the front panel. The TRIGGER set value check terminal is so constructed that a metal rod (2mm in diameter and more than 20mm long) whose point is sharp such as a circuit tester probe can be appropriately used. The trigger level can be set by rotating the TRIGGER voltage adjuster on the panel front. In addition, for the locations of the TRIGGER set value check terminal and the TRIGGER voltage adjuster corresponding to each channel, see item 6-1. (1) Insert the + terminal of the circuit tester (or digital millimeter) into the TRIGGER set value check terminal (CK) corresponding to the desired channel. Also touch the terminal of the circuit tester with the outer metal cylinder of the monitor output terminal (MON) or the pulse output terminal (PLS). The voltage indicated on the circuit tester corresponds to the present trigger voltage. VM-5P3 Tester TRIG PLS MON SET CK [+] [-] (2) Turn the TRIGGER voltage adjuster by using a small screwdriver to set trigger voltage to the desired value. The trigger voltage is output in the range of -1V to 20V. VM-5P3 TRIG Small driver PLS MON SET CK -31-

39 8. OPERATING METHOD VM-5P3 8-4 ALARM RESET MODE SETTING The OK alarm contact output, one of the two types can be selected: the automatic reset type which automatically resets the alarm when the OK alarm contact output is released fro the alarm state or the self-hold type which holds the alarm output until the RESET signal is input. This selection is made by the jumper switch on the main board ALARM RESET MODE SETTING METHOD (1) Remove the unit from the instrument rack. Prohibition Caution Do not pull out the face plate during operation. Will cause damage and malfunctioning of the instrument. Do not pull out the unit with the power turned on. Will cause damage and malfunctioning of the instrument. (2) There is the alarm reset mode setting jumper (J3C) on the main board. With No.1 and No.2 shorted with a jumper pin, the alarm reset mode is set to SELF-HOLD. Similarly, with No.2 and No.3 shorted with the jumper pin, the alarm reset mode is set to AUTO-RESET, respectively. For details, see Checking the switch. J3C Do not touch any points other than those specified. (3) Check the alarm reset mode selected, then mount the unit on the instrument rack. Always secure the face plate with the screws attached. Otherwise, the unit may be affected by noise or result in imperfect connection. -32-

40 8. OPERATING METHOD VM-5P ALARM RESET METHOD In order to reset the alarm, it is necessary to input the RESET signal to the rear terminal board of the instrument rack. The alarm can be reset only with the alarm set to the self-hold type. In addition, no reset function is activated when the signal level is in the alarm state. (1) Usually, open the RESET terminals on the rear terminal board. (2) When resetting the alarm, short between the RESET terminals. If the input signal is out of the alarm state, the alarm output returns to the normal state just after the terminals are shorted. For details on wiring the RESET terminals, see the instruction manual for the respective instrument rack. Caution When the VM-5W1 is used, the RESET signal acts on all of the units housed in the rack. However, the signal does not act on the unit without the contact output such as the Power Unit and VM-5X. -33-

41 8. OPERATING METHOD VM-5P3 8-5 ALARM RELAY MODE SETTING As the OK alarm contact output, either the energized alarm (normally de-energized) or the de-energized alarm (normally energized) can be selected. This selection is made by the jumper switch on the main board. (1) Remove the unit from the instrument rack. Prohibition Caution Do not pull out the face plate during operation. Will cause damage and malfunctioning of the instrument. Do not pull out the unit with the power turned on. Will cause damage and malfunctioning of the instrument. (2) There is the alarm relay mode setting jumper (J1C) on the main board. With DE-EN. Shorted with a jumper pin, the alarm relay mode is set to NORMALLY DE-ENERGIZED. Similarly, with EN. Shorted with the jumper pin, the alarm reset mode is set to NORMALLY ENERGIZED, respectively. For details, see Checking the switch. J1C Do not touch any points other than those specified. (3) Check the alarm reset mode selected, then mount the unit on the instrument rack. Always secure the face plate with the screws attached. Otherwise, the unit may be affected by noise or result in imperfect connection. -34-

42 8. OPERATING METHOD VM-5P3 8-6 SETTING ABNORMAL INPUT ALARM FUNCTION ON/OFF Prior to factory shipment, the phase marker unit is set so that no OK alarm contact is output even in the abnormal state such as the phase marker signal input not connected. The phase marker unit detects the abnormal phase marker signal for each channel to be able to output the OK alarm contact output when the alarm occurs in any one of the channels. This setting is made by the jumper switch on the main board. When not inputting the phase marker signal, always set this setting to OFF. (1) Remove the unit from the instrument rack. Prohibition Caution Do not pull out the face plate during operation. Will cause damage and malfunctioning of the instrument. Do not pull out the unit with the power turned on. Will cause damage and malfunctioning of the instrument. (2) There are the jumpers for setting abnormal input alarm function ON/OFF (J4A and J4B) on the main board. Shorting the OFF side with the jumper pin does not output the OK signal even if the phase marker signal is abnormal. On the contrary shorting the ON side with the jumper pin makes valid the abnormal input alarm function. J4A J4B Do not touch any points other than those specified. (3) Check the alarm abnormal input alarm function ON/OFF selected, then mount the unit on the instrument rack. Always secure the face plate with the screws attached. Otherwise, the unit may be affected by noise or result in imperfect connection. -35-