Omega Products CL-300 Installation Manual

TEMPERATURE

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Thermocouple, RTD & Thermistor
Probes, Connectors, Panels & Assemblies

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Wire: Thermocouple, RTD & Thermistor

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Calibrators & Ice Point References

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Recorders, Controllers & Process Monitors

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Infrared Pyrometers

PRESSURE, STRAIN
AND FORCE

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Transducers & Strain Gauges

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Instrumentation & Accessories

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Rotameters, Gas Mass Flowmeters
& Flow Computers

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Air Velocity Indicators

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Turbine/Paddlewheel Systems

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Totalizers & Batch Controllers

pH/CONDUCTIVITY

M

U

pH Electrodes, Testers & Accessories

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Benchtop/Laboratory Meters

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Controllers, Calibrators, Simulators
& Pumps

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Industrial pH & Conductivity Equipment

DATA ACQUISITION

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Data Acquisition &
Engineering Software

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Communications-Based
Acquisition Systems

MU

Plug-in Cards for Apple, IBM
& Compatibles

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Datalogging Systems

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Recorders, Printers & Plotters

HEATERS

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Heating Cable

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Cartridge & Strip Heaters

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ENVIRONMENTAL
MONITORING AND
CONTROL

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Refractometers

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Air, Soil & Water Monitors

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Industrial Water & Wastewater
Treatment

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pH, Conductivity & Dissolved
Oxygen Instruments

Where Do I Find Everything I Need for Process

Measurement and Control? OMEGA…Of Course!

M0144/0297

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

Portable Simulators

http://www.omega.com

e-mail: [e-mail]

User’s Guide

OMEGAnetSMOn-Line Service Internet e-mail

http://www.omega.com [e-mail]

Benelux:

Postbus 8034, 1180 LA Amstelveen,
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Tel: [phone] FAX: [phone]
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Servicing Europe:

USA and Canada:

Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

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Customer Service: 1-800-622-2378 / 1-800-622-BEST

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Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN

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TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

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tified

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Servicing North America:

For immediate technical or application assistance:

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Tel: (95) 800-TC-OMEGA

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tified

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Canada:

976 Bergar
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FAX: [phone]
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WARRANTY

OMEGA warrants this unit to be free of defects in materials and workmanship and to
give satisfactory service for a period of 37 months from date of purchase. OMEGA
Warranty adds an additional one (1) month grace period to the normal three (3)
year product warranty to cover handling and shipping time. This ensures that
OMEGA’s customers receive maximum coverage on each product. If the unit should
malfunction, 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. However, this WARRANTY is
VOID if the unit shows evidence of having been tampered with or shows evidence of
being 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 which wear or which are damaged by
misuse are not warranted. This includes contact points, fuses, and triacs.

OMEGA is glad to offer suggestions on the use of its various products.
Nevertheless, OMEGA only warrants that the parts manufactured by it will be as
specified and free of defects.

OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTA TIONS 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.

Every precaution for accuracy has been taken in the preparation of this manual;
however, OMEGA ENGINEERING, INC. neither assumes responsibility for any
omissions or errors that may appear nor assumes liability for any damages that result
from the use of the products in accordance with the information contained in the
manual.

SPECIAL CONDITION: Should this equipment be used in or with any nuclear
installation or activity, purchaser will indemnify OMEGA and hold OMEGA harmless
from any liability or damage whatsoever arising out of the use of the equipment in
such a manner.

Notes

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 1996 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 prior written consent of OMEGA
ENGINEERING, INC

.

RETURN REQUESTS / INQUIRIES

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 W

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

1. P.O. number under which the product

was PURCHASED,

2. Model and serial number of the product

under warranty, and

3. Repair instructions and/or specific prob-

lems relative to the product.

FOR NON-WARRANTY REPAIRS,

consult
OMEGA for current repair charges. Have
the following information available
BEFORE contacting OMEGA:

1. P.O. number to cover the COST of the

repair,

2. Model and serial number of product, and

3. Repair instructions and/or specific prob-

lems relative to the product.

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations
that apply. OMEGA is constantly pursuing certification of its products to the European
New Approach Directives. OMEGA will add the CE mark to every appropriate device
upon certification.

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.

Notes

Notes

42

Schematic–OMEGA Model CL-303

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

i

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

ii

Section 5 Specifications CL-303

Internal Batteries: Three 9 Volt Alkaline, MN1604 or

equivalent

Battery Life: Source; 25-hours at 20 mAcontinuous

output, 2-wire Simulator infinite

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

with optional ac adaptor; 800 ohms at
battery low limit

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

batteries if stored for extended
period.

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

1

/8" (54 mm)

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

Weight: 11 oz. (0.3 kg)

41

40

Figure 4-3. 2-Wire Simulator Hookup

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 AAcells 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.

1

Table 1-1

Model CL-300 Standard Ranges

2

39

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

38

Figure 4-1. Measuring mA Output

3

1.2 Features

• Calibrate and T roubleshoot T emperature Systems

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

• Choice of Cable Length and T ype

• T wenty-two Precise T est 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.

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.

4

37

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.

36

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%.

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.

5

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.

6

Section 4 Service Information

4.1 Maintenance

The CL-303 mA Source/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.

35

Figure 3-2. As a Milliamp Source

3.1.2 Directions for Source Mode

Disconnect any existing input wires from the device to be checked or
calibrated. T urn 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) 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 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.

34

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

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

7

8

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

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.

33

32

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.

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.

Section 5 Specifications CL-300

Batteries: Two “AA” alkaline cells provide

approximately one year of use

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

range

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

temperatures, add ±2˚.

Cold-junction Compensation: Built-in for specified thermocouple

type

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

±0.025 degrees/degree change in
ambient

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

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

Span: ±0.01% of span/degree

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

1

/8" (54 mm)

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

Weight: 6 oz. (0.15 kg)

9

10

Schematic–OMEGA Model CL-300

Table 1-1

CL-303 Dial Settings and Output

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.

31

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.

30

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

11

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

12

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 mA Output, 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

29

28

Schematic–OMEGA Model CL-302

Table 1-1

Model CL-301 Standard Ranges

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.

13

14

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.

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.

Section 5 Specifications CL-302

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

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

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

1

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

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

Weight: 3 oz. (85 grams)

27

26

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

Figure 4-1. Calibration Check

15

Figure 3-1. Connecting the RTD Simulator to Transmitter

or Receiver

16

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 .

25

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.

24

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..

17

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.

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

CAUTION

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

Table 4-1

Adjustment Values

18

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)

1.3902 (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 curve 43760 will be supplied.

23

Figure 3-1. Alternative Hookup Methods

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.

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.

22

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.

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

1

/8" (54 mm)

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

Weight: 3 oz. (0.12 kg)

19

Schematic–OMEGA Model CL-301

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

20

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.

21