Incutrol/2 Regulator

12216-08 Model 2597A Incutrol/2 Regulator Hach Company, 1986-1996. All rights. reserved. Printed in the U.S.A. 05/95 13ed 09/96 rev2

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Table of Contents Specifications...1 General Description...2 Setup...2 115-Volt Instrument...2 220-Volt Instrument...3 Maintenance...4 Troubleshooting...5 Parts List...8 How To Order...9 Repair Service...10 Warranty... 11 3

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Specifications Control Range Dead Band (Heater Off to Refrigerator On) Hysteresis (Heater Off to Heater On) Motor Control Limit Power Requirement Size Weight Power Cord 41-113 F ± 1.8 F (5-45 C ± 1 C) 0.5 C ± 0.2 C Approximately 0.2 C Up to ½ horsepower motor or 14 Amp RMS compressor 120 Watt 50-60 Hz 115 VAC ± 15% or 230 VAC± 15% 25.4 cm (10") long x 14.3 cm (5 5/8 ) wide x 8.6 cm (3 3/8") high 2.3 kg (5 lb.) 2.3 m (7.5'), 4 wire, 16 gauge 5

General Description The Model 2597A IncuTrol /2 Regulator is a self-regulating temperature controller designed to convert any manually defrosted refrigerator into an incubator. The instrument is used with the Hach Model 2173 BOD Apparatus for incubating wastewater samples during the five-day biochemical oxygen demand test. When placed in a working refrigerator, it will maintain a constant temperature within the range of 5 to 45 C. The instrument can also be used to control temperature environments in other sealed chambers where the required temperatures are above room temperatures but do not exceed 45 C. The temperature is maintained by means of temperature-controlled electronic gates which appropriately apply or interrupt AC power to the heater and refrigeration units. The fan runs continuously to ensure an even temperature throughout the compartment. A two-inch dial thermometer mounted on the front panel provides a convenient, easy-to-read temperature indication. The temperature is set with a screwdriver adjustment control, also located on the front panel. Power receptacles on the rear panel of the regulator allow two BOD respirometers to operate simultaneously. IncuTrol/2 Regulators can be purchased for either 115 or 220 volt operation. They cannot be converted because the heater and motor differ between the two instruments. The power required is approximately 120 watts. Setup 115-Volt Instrument 1. Place the IncuTrol */2 Regulator on one of the upper wire shelves in the refrigerator compartment. Best results are obtained when the unit is above the BOD Apparatus. Connect the regulator power cable to a convenient three-wire receptacle and close the refrigerator door. The cable has a flat design to allow the door to close tightly without affecting the air seal. 2. Connect the refrigerator power cord into the top of the regulator cable plug. Allow the temperature to rise until the refrigerator begins to operate. 3. Check the thermometer reading on the front of the IncuTrol/2 Regulator panel and adjust the temperature control to establish the desired incubation environment. Clockwise rotation increases the * IncuTrol is a Hach Company trademark. 6

Setup, continued temperature; counterclockwise decreases it. Several adjustments may be necessary until the correct setting is achieved. To more accurately set the temperature for settings above 35 C, place a separate thermometer near the sample as a supplemental reference to the dial thermometer on the front panel. 4. Once the desired temperature is reached, the incubator is ready for use. Connect the BOD Apparatus power cords to the receptacles provided on the rear panel. 220-Volt Instrument The 220-volt version of the Model 2597A IncuTrol/2 Regulator comes with an electrical outlet box to be used in place of the power plug. The power cable leads from the instrument are connected to a terminal strip within the box for convenient connection to facility power and the refrigerator power cord. Also supplied with the 220 volt instrument are two three-prong power plugs which mate with the regulator rear panel receptacles. These are provided to adapt 220-volt BOD measuring devices (other than Hach's) for operation with the IncuTrol/2 Regulator. Perform the setup as follows: 1. Open the outlet box cover and remove the appropriate knockout discs to admit the facility power and refrigerator leads. Connect the cable leads as shown do the diagram below. 2. Connect the facility power and refrigerator leads at the outlet box terminal strip. See Figure 1. Figure 1 Electrical Outlet Box 7

Setup, continued 3. If BOD measuring instruments other than Hach BOD Apparatus are to be connected to the rear receptacles, remove their power plugs and install the plugs supplied with the regulator in their place. 4. Place the regulator on one of the upper shelves in the refrigerator compartment. Best results will be obtained when the unit is above the BOD instruments. 5. Apply power to the instrument and close the refrigerator door. Allow the temperature to rise until the refrigerator begins to operate. 6. Check the thermometer reading on the regulator front panel and adjust the TEMPERATURE INCREASE control to establish the desired incubation environment. Clockwise rotation increases and counterclockwise rotation decreases the temperature. Several adjustments may be necessary until the correct setting is achieved. To more accurately set the temperature for settings above 35 C, place a separate thermometer near the sample and use that thermometer in place of the dial thermometer on the front panel. 7. Once the desired temperature is reached, the incubator is ready for use. Connect the BOD instruments to the rear panel. Maintenance No scheduled periodic maintenance is necessary for the IncuTrol/2 Regulator. As long as the proper incubation temperature is sustained, the instrument needs no attention other than watching the thermometer readings. If there is any question as to the accuracy of the thermometer reading, a second thermometer known to be accurate can be used to verify proper operation. 8

Troubleshooting Should a malfunction occur in the instrument, the trouble can be isolated either through visual observation or by performing continuity checks and resistance measurements. Figure 2 identifies the major assemblies and provides wiring information to assist in the replacement of defective components. All major assemblies plug into the circuit board and can be disconnected without using a soldering iron. A schematic (Figure 3) has been included to assist in troubleshooting. Replacement parts for the major assemblies are listed in the Parts List. The following paragraphs cover malfunctions which could occur, and describe the corrective action to be taken. 1. The unit is completely inoperable; i.e., fan and heater assemblies are not working. a. Unplug the power cable. b. Check the fuse by performing a continuity check or by installing a new fuse. c. Check the heat limiter by performing a continuity check. d. Check the fan motor by applying ac power directly to the motor leads. If the motor does not operate, it should be replaced. e. If the fuse, heat limiter or motor is not defective, replace the circuit board. 2. The fan is operating but the unit will not maintain temperature. a. Check the heater assembly by disconnecting the unit from the circuit board and performing a resistance check. Resistance should be approximately 150 ohms for the 115-volt heater and 500 ohms for the 220-volt element. Replace the heater assembly if the correct resistance reading is not obtained. b. Check the temperature control potentiometer by disconnecting the potentiometer assembly from the circuit board and measuring the resistance at the plug. The resistance should vary from 0 150 kohms. If the correct resistance reading is not obtained, replace the potentiometer assembly. c. Check the relay. When operating power is applied to the coil contacts, the relay should close. d. If neither the heater assembly, the temperature control potentiometer, nor the relay is defective, replace the circuit board. 9

Troubleshooting, continued Figure 2 Component Location 10

Troubleshooting, continued Figure 3 Schematic 11

Parts List Correspondence concerning the Hach IncuTrol/2 Regulator should be accompanied by the serial number of the instrument and the date of purchase. Ref. Description Cat. No. Circuit Board........................ 16016-00 F 1...... Fuse, 115 VAC operation (15 A, 250 VAC)... 11817-24 F 2...... Fuse, 220 VAC operation (10 A, 250 VAC).... 5272-24 H 1..... Heater Assembly, 115 VAC.............. 11913-43 Heater Assembly, 220 VAC.............. 11912-56 Heat Limiter Assembly................. 12025-56 Instruction Manual.................... 12216-08 M 1..... Motor Assembly, 115 VAC............... 11914-56 Motor Assembly, 220 VAC.............. 11915-56 Plug, Adapter, circle "F", 220 VAC only.... 11827-26 P 1...... Potentiometer Assembly, (temperature adjustment)............... 11917-56 Power Outlet Box, 220 VAC............. 16628-00 K 1...... Relay, 115 VAC........................ 9872-35 Relay, 220 VAC....................... 16040-00 Thermometer.......................... 5464-31 12

How To Order By Telephone: 6:30 a.m. to 5:00 p.m. MST Monday through Friday (800) 227-HACH (800-227-4224) By FAX: (970) 669-2932 By Mail: Hach Company P.O. Box 389 Loveland, CO 80539-0389 U.S.A. Ordering information by E-mail: orders@hach.com Information Required Hach account number (if available) Billing address Your name and phone number Shipping address Purchase order number Catalog number Brief description or model number Quantity Technical and Customer Service (U.S.A. only) Hach Technical and Customer Service Department personnel are eager to answer questions about our products and their use. Specialists in analytical methods, they are happy to put their talents to work for you. Call 1-800-227-4224 or E-mail techhelp@hach.com. International Customers Hach maintains a worldwide network of dealers and distributors. To locate the representative nearest you, send E-mail to intl@hach. com or contact: In Canada, Latin America, Africa, Asia, Pacific Rim: Telephone: (970) 669-3050; FAX: (970) 669-2932 In Europe, the Middle East, or Mediterranean Africa: HACH Company, c/o Dr. Bruno Lange GmbH Willstätterstr. 11 D-40549 Düsseldorf Germany Telephone: +49/[0]211.52.88.0 Fax: +49/[0]211.52.88.231 13

Repair Service Authorization must be obtained from Hach Company before sending any items for repair. Please contact the HACH Service Center serving your location. In the United States: Hach Company 100 Dayton Avenue Ames, Iowa 50010 (800) 227-4224 (U.S.A. only) Telephone: (515) 232-2533 FAX: (515) 232-1276 In Canada: Hach Sales & Service Canada Ltd. 1313 Border Street, Unit 34 Winnipeg, Manitoba R3H 0X4 (800) 665-7635 (Canada only) Telephone: (204) 632-5598 FAX: (204) 694-5134 E-mail: canada@hach.com In Latin America, the Caribbean, the Far East, the Indian Subcontinent, Africa, Europe, or the Middle East: Hach Company World Headquarters P.O. Box 389 Loveland, Colorado, 80539-0389 U.S.A. Telephone: (970) 669-3050 FAX: (970) 669-2932 E-mail: intl@hach.com 14

Warranty Hach warrants most products against defective materials or workmanship for at least one year from the date of shipment; longer warranties may apply to some items. HACH WARRANTS TO THE ORIGINAL BUYER THAT HACH PRODUCTS WILL CONFORM TO ANY EXPRESS WRITTEN WARRANTY GIVEN BY HACH TO THE BUYER. EXCEPT AS EXPRESSLY SET FORTH IN THE PRECEDING SENTENCE, HACH MAKES NO WARRANTY OF ANY KIND WHATSOEVER WITH RESPECT TO ANY PRODUCTS. HACH EXPRESSLY DISCLAIMS ANY WARRANTIES IMPLIED BY LAW, INCLUDING BUT NOT BINDING TO ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. LIMITATION OF REMEDIES: Hach shall, at its option, replace or repair nonconforming products or refund all amounts paid by the buyer. THIS IS THE EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY. LIMITATION OF DAMAGES: IN NO EVENT SHALL HACH BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND FOR BREACH OF ANY WARRANTY, NEGLIGENCE, ON THE BASIS OF STRICT LIABILITY, OR OTHERWISE. This warranty applies only to Hach products purchased and delivered in the United States. Catalog descriptions, pictures and specification, although accurate to the best of our knowledge, are not a guarantee or warranty. For a complete description of Hach Company s warranty policy, request a copy of our Terms and Conditions of Sale for U.S. Sales from our Customer Service Department. 15

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