Omega Products CN101C-4000F Installation Manual

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The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts no liability for any errors it contains, and reserves the right to alter specifications without notice. WARNING: These products are not designed for use in, and should not be used for, patient-connected applications.

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TABLE OF CONTENTS

CNIOO SERIES TEMPERATURE MONITORS

SECTION PAGE

SECTION 1 INTRODUCTION 1

1.1 General Description 1

1.2 Available Models 1

SECTION 2 INSTALLATION 3

2.1 Unpacking 3

2.2 Controller Location 3

2.3 Mounting 3

2.4 Wiring Power Circuit 4

2.5 Sensor Placement 4

2.8 Setup Procedure 5

SECTION 3 OPERATION 6

3.1 Operation 6

3.1.1 Controls and Indicators 6

3.1.2 Relay Output 7

3.2 Adjusting Setpoints 7

3.3 Adjusting Scan Time 7

SECTION 4 SERVICE INFORMATION 7

4.1 Maintenance

4.2 Test Procedure 7

4.2.1 Visual Inspection 7

4.2.2 Functional Observation 7

4.2.3 Calibration Temperature 9

4.2.4 Calibration Alarm 10

4.2.5 Zone Crosstalk 10

4.3 Troubleshooting 11

SECTION 5 SPECIFICATIONS 12

5.1 Thermocouple 12

5.2 RTD 13

5.3 Parts List 14

5.4 Calibration Charts 17

5.4.1 Calibration Table 0-2000

5.4.2 Calibration Table 0-500

5.4.3 Calibration Table 0-250

F-Type K 18

F-Type K 19

C-RTD 20

5.5 Component Layouts 21

5.8 Schematic 23

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SECTION 1 INTRODUCTION

1.1 GENERAL DESCRIPTION

The OMEGA® CN100 Series temperature monitor is a temperature indicator with either high or low alarms. The six input channels accept independent thermocouple inputs, and there is an individual setpoint for each channel. In operation, the CN100 will scan each channel for 4 to 12 seconds (via side adjustment), and the display will indicate the temperature measured by the individual thermocouples. A red LED indicates an alarm condition; in the event of an alarm, scanning is halted and the relay deenergizes, until the manual reset button is depressed. The CN101 models are high temperature alarms, while the CN102 units will alarm on low temperatures.

The CN102 models also feature a built-in cold start alarm suppression. When the “START UP” LED is lit, the alarm action is suspended until the temperatures of each input reach their respective setpoints. Power failures for less than 30 minutes do not affect the start-up operation.

1.2 AVAILABLE MODELS

CN101(*)-(**) HIGH ALARM

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CN102(*)-(**) LOW ALARM

RTD#

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SECTION 2 INSTALLATION

2.1 UNPACKING

Remove the packing list and verify that all equipment has been received. If there are any questions about the shipment, please call OMEGA Customer Service Department.

Upon receipt of shipment, Inspect the container and equipment for any signs of damage. Take particular note of any evidence of rough handling in transit. Immediately report any damage to the shipping agent.

NOTE

The carrier will not honor any claims unless all shipping materiel is saved for their examination. After examining and removing contents, save packing material and carton in the event reshipment is necessary.

2.2 CONTROLLER LOCATION

Select a location for the controller that is free from excessive shock, vibration, dirt, moisture, and oil. The ambient temperature should be between 30° and 130°F(-1° and 54°C).

2.3 MOUNTING

Mount the controller into a 3 5/8” (92mm) square cutout. Refer to Figure 2-1 for the cutout and case dimensions. The plugin controller does not have to be removed from its housing for mounting.

Remove the two screws that hold the mounting slides; then remove the slides. Insert the case into the cutout from the front side of the panel and reinstall the two slides and two screws. The length of the slides must be reduced if the controller is to be mounted in an extra thick panel. If the controller has been unplugged from its housing, the top of the housing can be determined by the serial tag.

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Figure 2-1. Outline Dimensions

2.4 WIRING POWER CIRCUIT

The controller operates on either 120 or 240 VAC, 50 to 60Hz line voltage when connected to the proper terminals. Incoming power lines should be properly fused. Refer to Figure 2-2.

NOTE

Fuse incoming high side of line with fast blow fuse of appropriate rating. Shorted heater or wiring will destroy the relay or output Triac.

2.5 SENSOR PLACEMENT

Proper sensor placement is essential. It can eliminate many problems in the total system. The probe should be placed so that it can detect any temperature change with little thermal lag. In a process that requires fairly constant heat output, the probe should be placed close to the heater. In processes where the heat demand is variable, the probe should be close to the work area. Experimenting with probe location can often provide optimum results.

In an ice bath process, the addition of a stirrer will help to eliminate lags. Some RTD’s are shock sensitive and require care in handling and installation.

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2.2 SET UP PROCEDURE

Wire the instrument as shown in Figure 2-2. Observe polarity (on the thermocouples red is always negative, on RTDs black is negative) and short all the unused zone inputs (do not short the analog output). Turn all the setpoints fully CW on CN101 models and CCW on the CN102 models. Power up the instrument. If any zone alarms, check for open thermocouples or setpoints turned the opposite way. Correct the problem and push the RESET button. Observe the scanning rate and readjust if needed at the side of the instrument. Push the SET button and release. The green light should appear for about 10 seconds and the display indicates the setpoint Adjust the setpoint of the indicated zone to the desired alarm temperature. If more time Is needed, push the SET button to get an additional 10 seconds. Wait for the green light to disappear and repeat the procedure for all used zones. For unused zones, leave the setpoints fully CW for CN101 models and fully CCW for CN102 models.

Figure 2-2. Wiring Diagram

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SECTION 3 OPERATION

3.1 OPERATION

The typical control system contains the sensor, controller and the process. The thermocouple sensor produces a small voltage change proportional to the measured temperature of the process. An RTD produces a change in resistance proportional to the measured temperature of the process. This is linearized in a unique active circuit, and amplified by the controller, where it is compared with setpoint temperature. If the temperature of the sensor is above setpoint, the output circuitry will be actuated. This is indicated by means of an LED light. The digital meter displays the sensor’s process temperature, and when switched, displays the alarm setpoints. Six zones share common amplifier and display.

3.1.1 Controls and Indicators (Refer to Figure 3-1)

1. LED Display (temperature or setpoint)

2. Setpoint (displayed by green LED)

3. Start Up button—cold start (CN102 only)

4. Alarm Light (red LED)

5. Zone Light (yellow LED)

6. Setpoint Control

7. Setpoint Enable

8. Manual Alarm Reset

9. Scan Time Adjust

10. Calibration LO and HI potentiometers

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3.1.2 RELAY OUTPUT

The output relay has SPDT contacts rated 5 amps at 120V and 3 amps at 240 VAC. These contacts can be wired to provide power to the alarm. This is a latching relay.

3.2 ADJUSTING SETPOINTS

Six setpoint adjustments are located on the faceplate. These are 15-turn potentiometers with slotted shafts. A small screwdriver is required.

3.3 ADJUSTING SCAN TIME

This adjustment is located on the side of the instrument. It is a 15-tum potentiometer with slotted shaft CW rotation increases the scan time.

SECTION 4 SERVICE INFORMATION

4.1 MAINTENANCE

Some simple preventative maintenance will keep the controller operating properly:

1. Keep the controller clean and protected from dirt, oil and corrosion.

2. Periodically recheck all electrical connections.

4.2 TEST PROCEDURE

4.2.1 Visual Inspection

1. Inspect the instrument for mechanical damage.

2. Make sure that all screws are tight.

3. Make sure all switches and lights are properly installed.

4. Make sure all labels are properly and correctly attached.

4.2.2 Functional Observation

1. Short the thermocouple or RTD inputs to each zone.

2. Attach cord and plug to 120 VAC line terminals.

3. Attach ohmmeter to C and NO relay terminals.

4. Insert the power cord to 120 VAC line outlet.

5. Observe that ohmmeter reads near zero ohms.

6. Observe that digital display is “on” and all the digits are working properly.

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7. Observe that only one scan light is on.

8. Observe that digital display reading is more than zero and less than 100

9. Adjust LO calibration potentiometer on the side of the instrument until the display reads 75 ±5

F (or 0C).

F (25 ±50C). Refer

to Figure 4.1.

10. Turn all setpoint controls 10 turns clockwise.

11. If the alarm light (red) is on, push the RESET button and remove the alarm.

12. Observe that zone light scans sequentially from zone to zone without skipping any zones.

13. Turn the scan time control fully CW (about 20 turns) and observe that the scan rate is more than 12 seconds.

14. Turn the scan time control fully CCW and observe that the scan rate is between 2-5 seconds.

15. Set the scan time at 5 seconds ±1 second.

16. When the scan light comes to zone 1, push the set switch and observe that the green setpoint light comes on. Observe that the light stays on for 7-15 seconds and the zone scan light stays on zone 1 as long as green light is on.

17. Push the SET button and turn the setpoint control fully CCW; observe that indication goes to 0000 -0 +2.

18. Observe that the alarm light comes on and ohmmeter resistance measures HI (open).

19. Push the SET button and turn the setpoint control fully CW. Observe that the display rises gradually from 0 to full range of the instrument.

20. Push the RESET button and observe that the RESET light is off and the instrument resumes scanning.

21. Repeat steps 17 through 20 for other channels.

22. Switch the power on and off several times and observe that the unit does not go to alarm condition.

23. Disconnect the thermocouple short from zone 1 and observe that when the scan light comes to zone 1, the instrument indicates alarm, the meter reeds full scale, and the scanning has stopped.

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4.2.3 Calibration Temperature

1. After the instrument has been warmed up for 15 minutes, attach proper thermocouple or RTD wire to zone 1.

2. Connect the other end of the wire to the thermocouple signal generator. Select proper cold junction compensation. Refer to Figure 4-2. For RTD version use precision decade resistance box.

3. Bring the instrument to alarm condition by setting the millivolt or resistance signal higher than the range of the instrument. This will stop the scanning and keep the instrument latched to the zone being calibrated.

4. Set the millivolt source or decade resistance box to low calibration point as indicated on the calibration tables.

5. Adjust the LO calibration potentiometer on the side of the instrument to read the proper typical value ±1

±1

6. Set the millivolt source or decade resistance box to high calibration point as indicated on the calibration tables.

7. Adjust the Hi calibration potentiometer on the side of the instrument to read the proper typical value ±1

±1

8. If large adjustments are made on HI calibration potentiometer, repeat steps 4 through 7 until all errors are eliminated.

9. Check all calibration points on the table to be within ±.25% of the typical calibration.

10.Measure that the DC voltage output corresponds to the calibration table. For RTD version, check resistance output.

F or

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Figure 4-2. Thermocouple Calibration

4.2.4 Calibration Alarm

1. Push the SET button and adjust zone 1 setpoint to mid-range.

2. Set the temperature input to .25% of range below the setpoint.

3. Push the RESET button and allow the scan light to go to zone2.

4. Set the input to zone 1 to .25% of range above the setpoint.

5. Observe that when the zone light comes to zone 1, the unit goes into alarm condition within 4 seconds.

4.2.5 Zone Crosstalk

1. Set zone 1 setpoint to full range.

2. Set zone 1 temperature to 90% of its range.

3. Set zone 2 setpoint to .25% of range above its shorted thermocouple temperature.

4. Reset alarm if necessary and allow the unit to scan.

5. Observe that zone 2 does not alarm.

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SYMPTOM

PROBABLE CAUSE

CORRECTIVE ACTION

1. instrument is inactive

2. Display reads full range unit in

alarm no scanning

3. No output, unit in alarm

4. Reading is zero

5. Reads ambient

6. Alarm does not

reset

7. Does not read

setpoints

8. Erratic indication

9. Cannot reach

range

10.Cannot adjust

scan rate

No line voltage

Blown fuse Dirty screw terminal Open transformer primary Open thermocouple probe or RTD probe Burned input l.C. Relay contacts or relay coil Reversed thermocouple leads Shorted thermocouple Broken or jammed reset switch Broken or loose switch Loose ribbon cable. Power supply faulty 5V Reference

Broken potentiometer

Check line voltage

Replace fuse Clean terminal Replace power transformer. Check probe

Replace Check relay. Clean or replace Check and correct.

Check and correct. Check and replace.

Tighten or replace.

Check cable. Check ±12V regulators. Check 5.03V ±.02; adjust if necessary. Replace potentiometer

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SECTION 5 SPECIFICATIONS

5.1 THERMOCOUPLE

ALARM TYPE

ACCURACY: INPUTS: NO. OF SETPOINTS: SCANNING RATE:

RELAY:

ANALOG OUTPUT:

ALARM OPERATION:

RESET:

MAX. VOLTAGE BETWEEN INPUTS:

POWER: POWER LOSS: DISPLAY:

AMBIENT OPERATING RANGE:

DIMENSIONS:

PANEL CUTOUT: DEPTH BEHIND PANEL:

TERMINALS:

CN1O1 models-high alarm; CN1O2 models-low alarm ±1% of range 6, thermocouple 6, independent for each input 4 to 12 seconds per channel, side adjustment SPDT Mechanical, rated 5A at 120 VAC, 3A at 240 VAC latching 0 to 5 VDC, scans sequentially from zone to zone (non-isolated) Relay de-energized. ALARM ON LED indicator on, scan hold until reset Manual, front pushbutton 10 VDC or 6 VRMS 120/240 VAC, 50/60 Hz Unit returns to ready state 4-digit LED, 0.6” 32 to 1350F

3.56”H x 3.56”W x 6.25”D 1/4 DIN, 3.622” x 3.622”

6.25” Type 6-32 screws

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5.2 RTD

ACCURACY: INPUTS:

NO. OF SETPOINTS: OPEN SENSOR INDICATION: SCANNING RATE: RELAY:

ANALOG OUTPUT:

ALARM OPERATION:

RESET:

MAX. VOLTAGE BETWEEN INPUTS:

POWER:

POWER LOSS:

RESOLUTION: DISPLAY: AMBIENT OPERATING RANGE: DIMENSIONS: PANEL CUTOUT: DEPTH BEHIND PANEL:

TERMINALS:

Greater than 0.5% range ±1 RTD 100 ohm Platinum (European) —2 wire “Top” input connector— common to all 6 channels (negative wire). “Bottom” input connector— single inputs to each channel (positive wire) 6, independent for each input Treated as alarm 4 to 12s per channel, side adjustment Mechanical, rate 5A @ 120 Vac (24 Vdc), 3A @ 240 Vac (48 Vdc); SPDT type 0 to 5 Vdc, non-isolated Relay de-energized, ALARM ON LED indicator on, scan hold until reset Manual, front pushbutton 10 Vdc or 6Vrms 120/240 Vac, 50/60 Hz Unit returns to ready state after power resumption 10 4-digit LED, 0.6” 32 to 135

3.56” H x 3.56”W x 7” D ¼ DIN, 3.622” x 3.622”

6.25” Type 6-32 screws

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5.3 PARTS LIST

P.C. Board-A

RESISTORS 1/4 WATT

1 - 220 ohm (R26) 2

- 1K (R6, R22)

4 - 1.5K (R9, R10, R11, R12) 1 - 2.2K (R17) 1 - 2.7K (R16) 6 - 4.7K (R4, R7, R8, R24, R29, R30) 7 - 10K (R2, R3, R5, R13.2, R14. R15, R23) 1 - 8.2K (R27)

1 - 18K (R28)

1 - 33K(R1)

1 - 66K (R19)

1 - lOOK (R20) 1 - 470K (R25)

PRECISION RESISTORS: 1 ‘ 400K(R18)

POTS: 1 - 2K (P3) (89PR) 2 - 1OOK (P1, P2) (89PR)

CAPACITORS: 1 - 68pF (C3) 1 - 220pF (C2)

1 - 4700 pF(C4)

3 - 0.01uF (Mylar) (C5, C8, near Q14) 1 - 2.2/50V (C7) 1 2 1 2 1

- 10/25V(C6)

- 10/50V (C9. C10)

- 100/25V (C1)

- 100/50V (C13. C141

- 1000/16V (C12)

DiODES:

9 - 1N4148 (D1, D2, D3, D4, D5, D6, D7, D8, D9) 4 - 1N4004 (D0, D11, D1Z, D13, D14)

TRANSISTORS: 7- 2N4424(Q2,Q3, Q4, Q5, Q7, Q23, Q24)

CRYSTAL: 1 ‘ 3.5795

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INTEGRATED CIRCUITS:

1 - 741 (Q19) 1 - 311 (Q18) 3 - 4518(Q 8,Q12, Q13) 2 - 4028 (Q1, Q16) 2 - 4040(Q11, Qi4) 2 - 4052(Q9, Q10) 1 - 4066(Q17) 1 - 4011 (Q6)

VOLTAGE REGULATORS:

1 . 317LZ (Q22) 1 - 7812(Q20) 1 - 7819(Q21)

RELAYS:

1 - 5 AMP Relay MS64-932

TRANSFORMER:

1 - 830957

HEADERS:

1 - 4161-14-03-P1 (Straight) 1 - 4162-22-06-P1

SOCKETS:

2 - 16 Pin MEGA 16MP

CONNECTOR:

1 - 4002-14-00-P5

P.C. Board-B PRECISION RESISTOR 1%:

1 1K (R52) 1 - 250K (R53) 1 - 174K(NearP10)

POTS: 1 - 200 ohm (P10) 89PR 7 - 10K (P4, P5, P6, P7, P8, P9, P11) 89PR

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CAPACITORS: 1 - 2.2/50 (C25) 1 - 4.7/50V (C22) 4 - 22/50 (C15, C16, C19, C23)

RESISTORS 1/4 WATT

6 - 100 ohm (R76, R77, R78, R79, R80, R81) 7 - 1K (R29, R49, R56, R57, R58, R62, R63) 1 - 1.5K (R72) 1 - 2.2K (R64) 2 - 4.7 (R74, R83) 5 - 10K (R27, R51, R59, R67, R69) 17 - 33K (R32, R33, R34, R37, R38, R39, R40, R45, R47,

R48, R50, R54, R55, R60, R61, R68, R70) 3 - 100K (R28, R46, R91) 1 - 220K(R35)

- 330K (R30) 2 - 1 Meg. (R36, R41) 1 - 1.5 Meg. (R42) 2 - 10 Meg. (R65, R66)

DIODES:

6 - 1N4148 (D15, D16, D18, D19, D20, D23) 6 - 1N751, 1N753 or 1N754 (Z2, Z3, Z4, Z5, Z6, Z7)

TRANSISTORS:

1 - 2N4424 (Q29)

INTEGRATED CIRCUITS: 3 - 4051(Q24,Q30,Q31) 2 - uA339 (Q25,Q26) 1 - 4066(Q27) I - 0P20 (Q28)

HEADERS:

1 - 14 PIn #4161-14-03-Pi (Straight)

SWITCHES:

2 - C&K8168(S1,S2) 2 - BIackCaps8025 2 - Metal Guards G-12A 2 - Washers

BARRIER CONNECTOR:

1 - A204207NLR50 1 - A20720NLR53

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CONNECTOR: 1-

4002-14-00-P5

1 - Cable #455-240-14

PC Board-C

RESISTOR 1/4 W:

7 - 47ohm

LED’s:

1 - Red (MV5754) 1 - Green (MV5454) 6 - Yellow(MV5354)

DISPLAY MODULE:

2- MAN6740

HARDWARE:

1 - Case

1-Backplate 1 - Bezel 1 - Face Plate (Metal) 1 - Face Plate (Plastic) 1 - SprIng 4 - 3/8” x 5/32” F/HD Screws 4 - 3/8” x 5/32” R/MD Screws 2 - 5/32 Nuts 1 - Red Lens

5.4 CALIBRATION CHARTS

The following charts are sample calibration charts for the

ranges 0-5000FJ, and 0-20000FK. For models other than these ranges,it is advisable to calibrate the units at 10% and 90% FS.

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