Omega CL-300 User guide

Download

Page 1

User’s Guide

Shop online at

omega.com

e-mail: [email protected]

For latest product manuals:

www.omegamanual.info

CL-300, CL-301, CL-302, CL-303

Portable Simulators

Page 2

omega.com [email protected]

Servicing North America:

U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047

Stamford, CT 06907-0047 USA

Toll-Free: 1-800-826-6342 (USA & Canada only) Customer Service: 1-800-622-2378 (USA & Canada only) Engineering Service: 1-800-872-9436 (USA & Canada only) Tel: (203) 359-1660 Fax: (203) 359-770 e-mail: [email protected]

For Other Locations Visit omega.com/worldwide

The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.

Page 3

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return package and on any correspondence. The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.

FOR WARRANTY RETURNS, please have the following information available BEFORE contacting OMEGA:

1. Purchase Order number under which the product was PURCHASED,

2. Model and serial number of the product under warranty, and

3. Repair instructions and/or specific problems relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest in technology and engineering.OMEGA is a registered trademark of OMEGA ENGINEERING, INC. © Copyright 2016 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of OMEGA ENGINEERING, INC.

RETURN REQUESTS / INQUIRIES

FOR NON-WARRANTY REPAIRS, OMEGA for current repair charges. Have the following information available BEFORE contacting OMEGA:

1. Purchase Order number to cover the COST of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems relative to the product.

consult

Page 4

Notes

Page 5

Table of Contents Section Page

Model CL-300 Portable

Thermocouple Source..........................................11

Model CL-301 Portable RTD Simulator.................12

Model CL-302 Portable

Transmitter Simulator..........................................21

Model CL-303 Portable

mA Source/2-Wire Simulator..............................30

Page 6

Table of Contents Model CL-300 Portable Thermocouple Source Section Page

Section 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . .1

1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Section 2 Installation . . . . . . . . . . . . . . . . . . . . . . . . .3

2.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Section 3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . .4

3.1 Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Section 4 Service Information . . . . . . . . . . . . . . . . . . .5

4.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4.2 Equipment Required for Calibration . . . . . . . . . . . . . . . . . . 5

4.3 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Section 5 Specifications . . . . . . . . . . . . . . . . . . . . . . .9

Page 7

Section 1 Introduction

1.1 Description

The OMEGA®Model CL-300 Thermocouple Source provides 22 precise temperature equivalent millivolt signals to transmitters, recorders, controllers, alarms, data acquisition, and computer systems. Model CL-300 is cold-junction compensated for ambient temperature variations and provides a thermocouple connector output. Cables are available in the desired length and terminal types to exactly duplicate the thermocouples in the system being tested. Conformity to the particular thermocouple vs millivolt curve is in accordance with the latest ASTM and IPTS standards for exact temperature simulation. Linear millivolt models are also available.

Thermocouple types E, J, K, and T are available in both ˚F and ˚C. T able 1-1 lists the standard ranges. Resolution is 25˚, 50˚, or 100˚ corresponding to full scale output of 500˚, 1000˚, and 2100˚ respectively.

Dual ranges, with an individual “ON” position for each range, allow quick, easy settings for any output. Calibrated accuracy is ±0.1% of span ±1 degree. For negative temperatur es, add ±2 degrees.

T wo internal AA cells provide power for approximately one year of everyday use. Afront panel LED pulses every time the unit is turned on to indicate proper battery voltage.

Page 8

Table 1-1

Model CL-300 Standard Ranges

Page 9

1.2 Features

• Calibrate and T roubleshoot Temperatur e Systems

• Simulates Thermocouples J, K, E, T, R, S, or mV Sour ce

• Choice of Cable Length and T ype

• T wenty-two Precise Test Points

• Portable, Long Battery Life

• Simple to Use, Inexpensive to Own

Section 2 Installation

2.1 Unpacking

Remove the Packing List to check off actual equipment received. If you have any questions about the shipment, please call OMEGA’s Customer Service Department.

Upon receipt of shipment, inspect the container for any signs of damage in transit. T ake 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 material is saved for their examination. After examining and removing contents, save packing material and carton in the event shipment is necessary.

Page 10

Section 3 Operation

3.1 Operating Instructions

Select the Model CL-300 for the correct thermocouple type, the desired temperature scale (F or C), and range, the ordered lead type(s).

Connect the Thermocouple Source to the thermocouple input terminals of the instrument or system to be tested.

Cold-junction compensation and instantaneous automatic standardization and built into the instrument.

Set the temperature selection switch to the desired temperature and slide the “ON” switch left or right to the selected scale. The battery check LED will pulse once indicating proper battery voltage. If no pulse is seen, the batteries should be replaced with two AAcells. Alkaline cells are preferred for longest life and widest operating temperature range.

End point calibration temperatures of the instrument are then selected on the Model CL-300 and any required adjustments are made. Intermediate points may then be selected to verify instrument linearity or check critical points.

Page 11

Section 4 Service Information

4.1 Maintenance

The OMEGA CL-300 Thermocouple Source requires little servicing. Should measurement inaccuracies be discovered, perform the adjustment and calibration procedure to recalibrate the instrument.

4.2 Equipment Required for Calibration

Digital thermometer, ±0.5˚ accuracy with 0.1˚ r esolution or equivalent. Digital voltmeter, 0.05% accuracy, 10-microvolt resolution or

equivalent. The recommended technique for calibrating a Model CL-300 requires

two meters. The digital thermometer is used to calibrate the output. The digital voltmeter is needed to calibrate the built-in cold-junction compensation.

4.3 Calibration Procedure

It is suggested that each time a unit is recalibrated, fresh AAbatteries (MN-1500-2) should be substituted for used batteries.

1 Switch the unit to each “ON” positions, making sure that the

battery check LED flashes.

2 Connect the digital thermometer, using the pr oper type thermo-

couple wire, directly to the exposed ends of the Model CL-300’s output wires.

Page 12

3. Connect the DVM to calibrate the cold-junction compensation as follows: The meter’s positive input is connected to the negative output of the Model CL-300 and the negative lead of the meter is connected to the outermost lead. Resistor R17 at the opposite end of the board. See Figure 4-1.

4. Before the cold-junction compensation can be adjusted, the ambient temperature of the Model CL-300 must be obtained. For highest accuracy, this is done by taking a reading on the meter that is already connected to the thermocouple output leads. With the range/power switch in the center “OFF” position, the meter will read the temperature at the internal Model CL-300 terminals.

5. To set the cold-junction compensation, move the range/power switch to the right-hand “ON” position, and the temperature selector to the highest output position.

6. The compensation potentiometer is then adjusted to the value shown in T able 4-1. The span (highest mV output) of the unit is now adjusted by means of the span potentiometer for the highest temperature reading of the unit being calibrated. See figure 4-1.

7. The cold-junction compensation should again be checked, and if readjusted, the span should be rechecked.

8. There are two separate zero (lowest mV output) adjustments. With the range/power switch still in the right-hand “ON” position, move the temperature selector switch to the lowest output position. The right-hand zero is then adjusted by means of the right-hand zero potentiometer. See Figur e 4-1.

Page 13

19. To calibrate the left-hand zero, select the left-hand “ON” position.

For the highest accuracy, the left-hand zero should be calibrated at the second lowest setting (+25˚ on 500˚ units; +50˚ on 1000˚ units, +200˚ on 2100˚ units). The left-hand zero is then adjusted by means of the left-hand zero potentiometer . (See Figure 4-1).

10. Recheck the span at the highest output. When the span and both

zeros have been calibrated, check the other output positions to assure that the Model CL-300 is operating properly.

The allowable variation in 2100˚ and 3100˚ units is ±3˚. For 1000˚ units, it is ±2˚. For the 500˚ units, the allowable tolerance is ±1.5˚. Add 1˚ to tolerances for negative temperatures.

Table 4-1

Cold Junction Compensation Set Points

Degrees C

20 21 22 23 24 25 26 27 28 29 30

T ype E

18.151

18.211

18.272

18.333

18.394

18.455

18.516

18.577

18.638

18.699

18.760

T ype J

15.409

15.460

15.512

15.564

15.615

15.667

15.719

15.770

15.822

15.874

15.926

T ype K

12.071

12.111

12.152

12.192

12.233

12.273

12.314

12.354

12.395

12.435

12.476

T ype T

12.130

12.170

12.211

12.252

12.292

12.333

12.374

12.414

12.455

12.496

12.537

T ype R& S

1.788

1.794

1.800

1.806

1.812

1.818

1.824

1.830

1.836

1.842

1.848

Page 14

Figure 4-1. Calibration Hook-Up, Model CL-300

Page 15

Section 5 Specifications CL-300

Batteries: Two “AA” alkaline cells provide

Battery Indicator: LED light pulse at turn-on in either

Accuracy: ±0.1% of span ±1˚. For negative

Cold-junction Compensation: Built-in for specified thermocouple

Cold-junction Temperature Effect: Within ±0.25 degrees at 75˚F (20˚C)

Operating Ambient Temperature: -10˚ to +130˚F (-25˚ to +55˚C)

Ambient Temperature Effect: Zero included in cold-junction effect.

Storage Temperature Limits: -40˚ to +160˚F (-40˚ to +70˚C) Output Impedance: Fixed, 50 ohms nominal Dimensions: H: 4" (101 mm) x W: 2

Weight: 6 oz. (0.15 kg)

approximately one year of use

range

temperatures, add ±2˚.

type

±0.025 degrees/degree change in ambient

Span: ±0.01% of span/degree

x D: 2 1/4" (57 mm)

/8" (54 mm)

Page 16

Schematic–OMEGA Model CL-300

Page 17

Table of Contents Model CL-301 Portable RTD Simulator Section Page

Section 1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . 12

1.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.2 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Section 2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Section 3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.1 Operating Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Section 4 Service Information. . . . . . . . . . . . . . . . . . . 16

4.1 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.2 Equipment Required for Calibration. . . . . . . . . . . . . . . . . . 16

4.3 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Section 5 Specifications . . . . . . . . . . . . . . . . . . . . . . . 19

Page 18

Section 1 Introduction

1.1 Description

The OMEGA®Model CL-301 Platinum RTD Simulator provides eleven precise temperatures for inputs to transmitters, recorders, contr ollers, alarms, data acquisition, and computer systems. Model CL-301 allows 2, 3, or 4-wire connections. Conformity to the particular RTD curve is in accordance with the latest DIN 43760 standard.

Calibrations are available in both ˚F and ˚C and standard ranges are listed in T able 1-1. Other ranges and curves are available as options. Resolution is 25˚, 50˚, or 100˚, corresponding to the full scale output of 250˚, 500˚, and 1000˚ respectively.

Positive switch selection allows quick, easy settings for any output. Calibrated accuracy is ±0.05% of span ±0.25˚.

1.2 Features

• Calibrate and T roubleshoot 2, 3, or 4-wire RTD systems

• Simulates 100 ohm RTD, alpha = .00385

* Choice of Output T erminal

• Eleven Precise Test Points

• Portable, No Battery or Power Required

• Simple to Use, Inexpensive to Own

Page 19

Model CL-301 Standard Ranges

Table 1-1

Section 2 Installation

2.1 Unpacking

Remove the Packing List to check off actual equipment received. If you have any questions about the shipment, please call OMEGA’s Customer Service Department.

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

Page 20

NOTE

Section 3 Operation

3.1 Operating Instructions

Select the particular OMEGAModel CL-301 for the desired temperature scale (F or C), and appropriate temperature range. Then choose the cable type (2, 3, or 4-wire) that is equivalent to the RTD you are simulating . See Figure 3-1.

Connect the RTD Simulator leads to the input terminals of the instrument or system to be tested. Typically the CL-301 might feed a recording system, a controller, a datalogger , and a computer interface.

Set the temperature selection switch on the CL-301 to the desired temperature. End point calibration temperatures of the instrument are then selected on the CL-301 and any required adjustments are made. Intermediate points on the CL-301 may then be selected to verify instrument linearity or to check critical points.

Page 21

Figure 3-1. Connecting the RTD Simulator to Transmitter

or Receiver

Page 22

Section 4 Service Information

4.1 Maintenance

The OMEGA CL-301 RTD Simulator requires little servicing. Should measurement inaccuracies be discovered, perform the adjustment and calibration procedure to recalibrate the instrument.

4.2 Equipment Required for Calibration

Digital ohmeter, 0.025% accuracy with 4-wir e ohm connections (OMEGA Model 881 or equivalent).

4.3 Calibration Procedure

Calibrate the instrument in the following manner: 1 Connect the unit to the meter in a 3-wire hookup.

2. Move the slide switch to the lowest temperature position (position

1) and adjust corresponding potentiometer (Pot 1, Figure 4-1) according to the resistance value obtained form Table 4-1.

3. Move the switch to the next temperature position (2) and adjust corresponding potentiometer (Pot 2).

4. Continue this procedure for all remaining temperature positions in ascending order .

Page 23

5. Upon completion, move the switch back to position 1. Check and readjust potentiometer (Pot 1), if necessary. In increasing order, check and readjust each position as necessary to obtain specified accuracy.

CAUTION

Each time a position is adjusted, ALL higher number positions must be rechecked.

Figure 4-1. Potentiometer Adjustments, Model CL-301

Page 24

Table 4-1

Adjustment Values

Material and Nominal Resistance Alpha (α) R (100˚C)/R (0˚C)

Platinum (PT.)* 1.3850 (DIN Standard 43760) 100 OHM 1.3926 (U.S. Laboratory) 200 OHM 1.3889 (Canadian) 500 OHM 1.3911 (U.S. Industrial)

Nickel 1.6720 120 OHM 600 OHM

Nickel-Iron 1.5188 604 OHM

Copper 1.4274

9.035 OHM (10 OHMS at 25˚C) 234 OHM

421.2 OHM 1000 OHM 2000 OHM (at 70˚F)

*If not specified DIN standard cur ve 43760 will be supplied.

1.3902 (U.S. Industrial)

Page 25

Section 5 Specifications CL-301

Accuracy: ±0.05% of span ±0.25 degree

Operating Ambient Temperature: -10˚ to +130˚F (-25˚ to +55˚C)

Ambient Temperature Effect: ±0.01% degree (% of span) Storage Temperature Limits: -40˚ to +160˚F (-40˚ to +70˚C) Dimensions: H: 4" (101 mm) x W: 2

x D: 2 1/2" (38 mm)

Weight: 3 oz. (0.12 kg)

Schematic–OMEGA Model CL-301

/8" (54 mm)

Page 26

Table of Contents Model CL-302 Portable Transmitter Simulator Section Page

Section 1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . 21

1.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1.2 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Section 2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Section 3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.1 Operating Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Section 4 Service Information. . . . . . . . . . . . . . . . . . . 24

4.1 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.2 Equipment Required for Calibration. . . . . . . . . . . . . . . . . . 24

4.3 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.3.1 Calibration Hookup Procedure . . . . . . . . . . . . . . . . . . . . . . 24

4.3.2 Span and Zero Adjustment Procedures . . . . . . . . . . . . . . . 25

4.3.3 Linearity Test Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Section 5 Specifications . . . . . . . . . . . . . . . . . . . . . . . 27

Page 27

Section 1 Introduction

1.1 Description

The OMEGA®Model CL-302 T ransmitter Simulator provides lab accuracy for a wide range of settings. Instant availability of data is assured; no internal batteries or line cords are ever needed. Latest microcircuitry includes a precision refer ence, ultra-stable comparator, and a high-gain power Darlington output. Switch settings of 0%, 25%, 50%, 75%, and 100% allow fast full range check out of the instrument to be calibrated. Low minimum voltage drop enables other devices to remain in the loop while the receiving device is being calibrated.

1.2 Features

• Calibrate or T est, 4-20 mASystems

• Simulates Loop Powered Transmitter

• Five Precise Test Points

• Portable, 0.1% Accuracy

• No Batteries of Power Required

Section 2 Installation

2.1 Unpacking

Remove the Packing List to check off actual equipment received. If you have any questions about the shipment, please call OMEGA’s Customer Service Department.

Page 28

NOTE

Section 3 Operation

3.1 Operating Instructions

First disconnect the transmitter form the loop, leaving the power source and receiver in place.

Connect the two clip leads of the Simulator to the positive (+) and the negative (-) field connections of the receiver or controller (to be checked or calibrated) in place of the field 2-wire transmitter. See Figure 3-1. An LED indicates current flowing through the calibrator. The selector switch is then positioned at the 0% point. Exactly 4 mA will pass through the loop. At this time, the zero of the r eceiver is adjusted. Move the switch to allow 100% to pass and make the required full scale adjustment. When both span and zero are corr ect, the 25%, 50% and 75% settings are used to check linearity. Selected settings are accurate within ±0.1% of span.

Page 29

Figure 3-1. Alternative Hookup Methods

Page 30

Section 4 Service Information

4.1 Maintenance

The OMEGA CL-302 Transmitter Simulator is long-lasting and requires little servicing. Should measurement inaccuracies be discovered, perform the adjustment and calibration procedures, specified below , to recalibrate the instrument.

4.2 Equipment Required for Calibration

Digital voltmeter,4 1/2digit, 0.05% (or better) accuracy with a precision (±0.05%) 250-ohm resistor.

4.3 Calibration Procedure

Calibration requires a hookup protocol, span and zero adjustments, and a linearity test.

4.3.1 Calibration Hookup Protocol

1 Set the calibrating meter to a range which covers the 1 to 5 V dc

spectrum with sufficient resolution.

2. Place the 24 to 30 V dc power supply in series with the 250 ohm (±0.05%) resistor and the Simulator which is to be calibrated. The meter will read 1 to 5 volts corresponding to 4-20 mAthrough the resistor . See Figure 4-1. The LED on the Simulator should be lit, indicating that the connections are correct and that the unit is functioning..

Page 31

4.3.2 Span and Zero Adjustment Procedures

1 Set the switch on the Model CL-302 to the 209 mA (100%) position.

2. The span potentiometer is adjusted so that the meter reads 5.000 volts. See Figure 4-2.

3. The switch is now moved to position 4 mA (0%).

4. The zero potentiometer is adjusted until the meter reads 1.000 volts.

5. Check and readjust the span and the zero controls until they are within ±0.1% accuracy (±0.02% typical).

4.3.3 Linearity Test Protocol

1 Move the switch to position 8 mA (25%). The meter should read

between 1.996 V and 2.004 V.

2. With the meter set at 12 mA (50%), the meter should read between

2.996 V and 3.004 V.

3. Setting the meter at 16 mA ((75%), the meter should read between

3.996 V and 3.004 V.

Page 32

Figure 4-1. Calibration Check

Figure 4-2. Zero and Span Controls, Model CL-302

Page 33

Section 5 Specifications CL-302

Calibrated Accuracy: ±0.1% of span Precise Switch Settings: 0, 25, 50, 75, 100% of full scale

Temperature Effect: ±0.01%/˚C Loop Voltage Rating: Any between 6 and 45 volts Voltage Drop: 6 V and 20 mA Dimensions: H: 3

Weight: 3 oz. (85 grams)

equivalent to 4, 8, 12, 16, 20 mA

/4" (82 mm) x W: 2 1/8"

(54 mm) x D: 1 1/8" (29 mm)

Page 34

Schematic–OMEGA Model CL-302

Page 35

Table of Contents Model CL-303 Portable mA Source/

2-Wire Simulator Section Page

Section 1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . 30

1.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

1.2 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Section 2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . 32

2.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Section 3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 33

3.1 Operating Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

3.1.1 Directions for 2-Wire Simulator Mode . . . . . . . . . . . . . . . . 33

3.1.2 Directions for Source Mode. . . . . . . . . . . . . . . . . . . . . . . . . . 34

Section 4 Service Information. . . . . . . . . . . . . . . . . . . 35

4.1 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4.2 Equipment Required for Calibration. . . . . . . . . . . . . . . . . . 35

4.3 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

4.3.1 mAOutput, Source Mode Calibration . . . . . . . . . . . . . . . . 36

4.3.2 Span and Zero Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . 36

4.3.2.1 2-Wire Simulator Mode Check . . . . . . . . . . . . . . . . . . . . . . . 37

Section 5 Specifications . . . . . . . . . . . . . . . . . . . . . . . 41

Page 36

Section 1 Introduction

1.1 Description

The dual function OMEGA®CL303 Simulator combines a selfcontained 4-20 mA source with a 2-wire Simulator in one pocketsized instrument.

Internal batteries are used in the source mode to provide continuously adjustable 4-20 mA into any load from 0-800 ohms. An optional ac adaptor allows full-time bench use.

The 2-wire Simulator mode utilizes external loop power to pass precisely adjustable 4-20 mA. Loop power may vary from 6 to 45 V dc.

In addition to the 0.1% accurate digital dial adjustments, switch selected signals are provided at 4.00 mA(00.0%) and 20.00 mA (100%) for “quick check” zero and full scale settings in both modes (refer to T able 1-1).

Small size is made possible through state-of-the-art design which includes a precision reference, an ultra-stable amplifier, and high-gain power Darlington output. Accuracy, stability and low power consumption are combined through he use of the latest microcircuitry.

Continuous adjustability with memory lock assures fast, precise settings of current trips, recorders, data loggers, controllers, computers, and final control elements. Long life batteries allow complete portability for checkout and calibration of all milliamp input devices.

Page 37

CL-303 Dial Settings and Output

Table 1-1

Dial Setting Output Current

% Milliamps

00.0 4.00

05.0 4.80

10.0 5.60

15.0 6.40

20.0 7.20

25.0 8.00

30.0 8.80

35.0 9.60

40.0 10.4

45.0 11.2

50.0 12.0

55.0 12.8

60.0 13.6

65.0 14.4

70.0 15.2

75.0 16.0

80.0 16.8

85.0 17.6

90.0 18.4

95.0 19.2

100.0 20.0

NOTE: Decimal point not shown on instrument’s dial.

Page 38

1.2 Features

• Calibrate or T est 4-20 mAdc Systems

• Precise 4-20 mAdc Source

• Simulates Loop Powered Transmitter

• Continuous 0 to 100% settings

• Quick Check 0% to 100% switch

Section 2 Installation

2.1 Unpacking

Remove the Packing List to check off actual equipment received. If you have any questions about the shipment, please call OMEGA’s Customer Service Department.

NOTE

Page 39

Section 3 Operation

3.1 Operating Instructions

Outlined below is the operating protocol for the two modes of operation.

3.1.1 Directions for 2-Wire Simulator Mode

Disconnect any existing 2-wire transmitter from the loop to be checked or calibrated. (Only one of the two wires need be disconnected). Leave the power source and the receiver in place.

Place the mode selector switch into the 2-wire position. Connect the red clip lead of the Model CL-303 to the positive (+) terminal of the field connections. Connect the black lead to the negative (-) terminal. See Figure 3-1.

The LED will glow steadily when current flows. If no glow appears, recheck all external connections. Internal batteries are not used in this mode.

The 00.0% (4.00 mA) and 100% (20.00 mA) Dial adjustments are selected with the right-hand switch. Fast zero and full scale checks can be made by means of the 00.0% and the 100% positions. Athird quick check position may be established by adjusting the digital dial to the desired percent value and locking it in place. The continuous adjustment dial reads directly in percent of the 4-20 mAsignal. For example, a dial setting of 750 is 75% of span or 16mA. Complete the adjustments and turn the instrument off.

Page 40

3.1.2 Directions for Source Mode

Disconnect any existing input wires from the device to be checked or calibrated. Turn the mode selector switch (left-side) to the mAout position. The LED will pulse brightly once if the battery voltage is sufficient. If the LED does not pulse, turn it off and check the batteries.

Connect the red positive (+) lead to the positive input of the device to be checked or calibrated. Connect the black negative (-) lead to the negative terminal. See Figure 3-2. The LED will glow steadily when current is flowing. If no glow appears, check the hookup and connections.

The 00.0% (4.00 mA) and 100% (20.00 mA) D selected with the right-hand switch. Fast zero and full scale checks can be made by means of the 00.0% and the 100% positions. A third quick check position may be established by adjusting the digital dial to the desired percent value and locking it in place. The continuous adjustment dial reads directly in percent of the 4-20 mA signal. For example, a dial setting of 500 is 50% of span or 12mA. Complete the adjustments and turn the instrument off. Reconnect any wires that were removed for the check out.

ial adjustments are

Figure 3-1. As a 2-Wire Simulator with Self Powered Unit

Page 41

Figure 3-2. As a Milliamp Source

Section 4 Service Information

4.1 Maintenance

The CL-303 mASource/2-wire Simulator requires little servicing. Should measurement inaccuracies be discovered, perform the adjustment and calibration procedures to recalibrate the instrument.

4.2 Equipment Required for Calibration

Digital voltmeter, 4 1/2" digit, 0.05% or better accuracy, with a precision (±0.5%) 250 ohm resistor. As a less accurate alternative, a dc millimeter may be used directly–which eliminates the 250 ohm resistor.

Page 42

4.3 Calibration Procedure

Both the mA output and the span and zero adjustments must be calibrated, as specified below .

4.3.1 mA Output, Source Mode Calibration

Proceed as follows:

1. Before any adjustments to the Model CL-303 are made, fresh alkaline batteries MN1604, should be placed in the unit.

2. Switch the left-hand switch to position mA OUT while observing the LED. The LED should flash once, indicating proper battery voltage. If the LED does not flash, check each battery for proper voltage and for correct connection.

3. Set the meter to a range which covers one to five V dc with sufficient resolution.

4. Place the 250 ohm (±0.05%) resistor in series with the Model CL-303 output. The meter will read 1 to 5 volts corresponding to 4-20 mA through the resistor. See Figure 4-1.

4.3.2 Span and Zero Adjustments

Make the necessary calibration adjustments as indicated below.

1. Set the left-hand switch to position mA OUT and the right-hand switch to position 100%.

Page 43

2. The span potentiometer (Figure 4-2) should now be adjusted so that the meter reads 5,000 volts.

3. The right-hand switch is now moved to the 00.0% position.

4. The zero potentiometer should now be adjusted so that the meter reads 1.000 volts.

5. Check and readjust the span and zero controls until no further adjustments are necessary.

6 Move the right-hand switch to the Dial position. The meter

should read between 1.996 V and 2.004 V when the dial is set at

25.0 (Note: decimal points are not shown on the dial). Other readings are 2.996 V to 3.004 V at a setting of 50.0% and 3.98 V to

4.004 V at a setting of 75.0%. The dial has been mechanically set at the factory and should need no adjustment under normal operating conditions.

4.3.2.1 2-Wire Simulator Mode Check

To check the 2-wire Simulator of the CL-303:

1. Reconnect the test set-up to that shown in Figure 4-3.

2. Move the left-hand switch to the “2-wire” position.

3. Place a 24-30 V dc power source in series with the Model CL-303 and the 250 ohm resistor . The 100%, 00.0% and dial readings should all be within ±0.1% F .S. ±1˚ of those found in the source mode.

Page 44

Figure 4-1. Measuring mA Output

Page 45

Figure 4-2. Adjustment of Span Potentiometer, Model CL-303

Page 46

Figure 4-3. 2-Wire Simulator Hookup

Page 47

Section 5 Specifications CL-303

Internal Batteries: Three 9 Volt Alkaline, MN1604 or

Battery Life: Source; 25-hours at 20 mAcontinuous

Battery Status Indicator: LED pulse at turn-on, in source mode Calibrated Accuracy: ±0.1% Resolution: 0.02% Temperature Effect: 0.01%/˚C Output Drive Capability: 1200 ohms with fresh batteries, or

Power Supply Effect: 0.005%/Volt Operating Ambient

Temperature: -10˚ to +140˚ F (-25 to +60˚C) Storage Temperature Limits: -40˚ to +160˚F (-40˚ to +70˚C). Remove

Warm-up Time: 2-seconds to rated accuracy Dimensions: H: 4" (101 mm) x W: 2

Weight: 11 oz. (0.3 kg)

equivalent

output, 2-wire Simulator infinite

with optional ac adaptor; 800 ohms at battery low limit

batteries if stored for extended period.

x D: 2 1/4" (57 mm)

/8" (54 mm)

Page 48

Schematic–OMEGA Model CL-303

Page 49

Notes

Page 50

Notes

Page 51

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanshipfor a period of 13 months from date of puchase. OMEGA’s WARRANTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of OMEGA with respect to this order, whether based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price of the component upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or with any nuclear installation or activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY/ DISCLAIMER language, and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product(s) in such a manner.

WARRANTY/DISCLAIMER

Page 52

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

Shop online at omega.com

TEMPERATURE

Thermocouple, RTD & Thermistor Probes,

Connectors, Panels & Assemblies

Wire: Thermocouple, RTD & Thermistor

Calibrators & Ice Point References

Recorders, Controllers & Process Monitors

Infrared Pyrometers

PRESSURE, STRAIN AND FORCE

Transducers & Strain Gages

Load Cells & Pressure Gages

Displacement Transducers

Instrumentation & Accessories

FLOW/LEVEL

Rotameters, Gas Mass Flowmeters

& Flow Computers

Air Velocity Indicators

Turbine/Paddlewheel Systems

Totalizers & Batch Controllers

pH/CONDUCTIVITY

pH Electrodes, Testers & Accessories

Benchtop/Laboratory Meters

Controllers, Calibrators, Simulators

& Pumps

Industrial pH & Conductivity Equipment

DATA ACQUISITION

Data Acquisition &

Engineering Software

Communications-Based

Acquisition Systems

Plug-in Cards for Apple, IBM

& Compatibles

Data Logging Systems

Recorders, Printers & Plotters

HEATERS

Heating Cable

Cartridge & Strip Heaters

Immersion & Band Heaters

Flexible Heaters

Laboratory Heaters

ENVIRONMENTAL MONITORING AND CONTROL

Metering & Control Instrumentation

Refractometers

Pumps & Tubing

Air, Soil & Water Monitors

Industrial Water & Wastewater

Treatment

pH, Conductivity & Dissolved

Oxygen Instruments

M0144/0116