Omega CL3512A User Manual

#17000

-0513-OME1

CL3512A

Digital Thermometer & Calibrator

OMEGAnetSM On-Line Service

http://www.omega.com

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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 application.

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Table of contents

1.0 Introduction

1.1 Safety Information

1.2 Unpacking

2.0 Operation Procedure

2.1 Unit Drawing

2.2 Description of Buttons and Switches

2.3 Read Mode Procedure

2.4 Source Mode Procedure

3.0 Operator Maintenance

4.0 Specifications

5.0 Calibration Procedure

removing contents, save the packing material and carton in

1.0 Introduction

The OMEGA® CL3512A calibrator/thermometer is two meters in one. The
CL3512A simulates type J/K/T/E thermocouple signals. Each signal is
adjustable by using the coarse and fine dials. The CL3512A can also be used
as a dual type J/K/T/E thermocouple input thermometer. Features include a
large 3½ digit display with backlighting and display selections of HOLD, °C/°F,
and0.1/1°.
The source mode of the CL3512A simulates the thermocouple output to check
the operation of a thermocouple meter and make rough calibration
adjustments. A more accurate calibrator would be required for calibration of
thermocouple meters to specify tolerances.

1.1 Safety Information

It is recommended that you read the safety and operation instructions before
using the thermometer.

To avoid electrical shock, do not use this instrument when working

voltages at the measurement surface over 24V AC or DC.

To avoid damage or burns, do not make temperature measurement

Repeated sharp flexing can break the thermocouple leads. To prolong

lead life, avoid sharp bends in the leads, especially near the connector.

WARNING

WARNING

in microwave ovens.

CAUTION

1

1.2 Unpacking

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

Upon receipt of shipment, inspect the container and equipment for any signs
of damage. Immediately report any damage to the shipping agent.

The carrier will not honor any claims unless all shipping
material is saved for their examination. After examining and

the event reshipment is necessary.

The following is supplied in the box:

 CL3512A
 Rubber boot
 2 K beaded wire thermocouples
 K calibration cable
 9 volt battery
 Operator's manual

NOTE

2

2.0 Operation Procedure

2.1 Drawing of Unit

Actual Dimensions: 195mm(H) x 92mm(W) x 53mm(D)

3

2.2 Descriptions of Buttons and Switches

Buttons

/

Temperature is displayed in either degrees Celsius(°C) or degrees
Fahrenheit(°F). When the thermometer is turned on, it is set to the
temperature scale that was in use when the thermometer was last turned off.
To change the temperature scale, press the °C or °F key.

Press “
switch-off automatically after 37 seconds.

Press the HOLD key to enter the Data Hold mode, the “HOLD” annunciator is
displayed. When HOLD mode is selected, the thermometer will hold the
present reading and stop all further measurements.
Pressing the HOLD key again will cancel HOLD mode causing the
thermometer to resume taking measurements.

The TYPE key allows for selection of J, K, E or T thermocouple types as either
the input or simulated output. To select thermocouple type press type key
once. Unit will briefly show 1888 and beep and then the type of thermocouple
selected will be indicated on the left hand side of the display. Continue
pressing the type key to step through the thermocouple types until desired
type is indicated.

Button

” button to toggle the on and off backlight. The backlight will

Button (HOLD Mode)

Button (K/J/T/E Input Thermocouple Type Selection)

4

Input Selections

/

/

The input selection indicates which input is selected; T1 thermocouple, T2
thermocouple or the difference between the two thermocouples (T1-T2).
When the thermometer is turned on, it is set to the temperature input that was
in use when the thermometer was last turned off.

Selector Switch

The circular selector switch is used to turn the unit off () or to select Reading
Mode (Input) or Simulation Mode (Output). There are nine selector switch
positions under output which provide rough adjustment of the simulated
output.

Adjust

Course and fine adjustment Dials are used in Simulation Mode to allow a
particular simulated temperature to be selected once the output has been
adjusted close to the desired temperature using the selector switch.

5

2.3 Read Mode Procedure

1. Plug Thermocouple Sensor into input T1 and/or T2.

2. Turn selector switch to Input.

3. Select proper thermocouple type (J, K, T or E) using type button.

4. Press T1 button to read thermocouple connected to input T1.
Press T2 button to read thermocouple connected to input T2.
Press T1-T2 if difference between T1 and T2 is to be read.

5. To Hold reading press HOLD button. To resume making measurements
press HOLD again.
Note: Unit will display -OL if input is out of range or thermocouple is broken

or not connected to proper input.

To save battery life, CL3512A will turn off automatically if no is key is pressed
for 90 minutes.

6

2.4 Source Mode Procedure (Calibration Simulation)

1. Turn CL3512A on by turning selector switch to any one of the output
selector positions.

2. Press T1 button.

3. Select thermocouple type (J, K, T or E) using type button.
Select °C or °F using °C or °F buttons.

4. Plug proper type of thermocouple wire into either one of the two output
connectors. (SMP male connector required)

5. Attach the other end of the thermocouple wire to the instrument being
tested/calibrated.

6. Move the output range switch to the temperature value close to the desired
simulated value.
Note: There are 9 temperature range switch positions arranged from left to

right representing low to high temperatures.
The display will read -OL if the output voltage for the meter is higher
than the maximum voltage for that particular thermocouple type. For
type T this will be in the highest 4 positions, type K in the highest 3
positions, type J in the highest 2 positions, and type E in the highest

7. Adjust course and/or fine adjustment dial until desired temperature is

8. Instrument under test should read same temperature as CL3512A. If not

9. Repeat steps 6-8 at different temperatures as needed.

position only.
displayed on CL3512A.
adjust instrument under test or have recalibrated.

7

Source Mode Diagram

8

3.0 Operator Maintenance

To avoid possible electrical shock, disconnect the thermocouple

WARNING

connectors from the thermometer before removing the cover.

Battery Replacement

Power is supplied by a 9 volt “transistor” battery. The “

LCD display when replacement is needed. To replace the battery, remove the
two screws from the back of the meter and lift off the battery cover. Remove
the battery from battery contacts.

9

” appears on the

4.0 Specifications

ELECTRICAL

Temperature Scale: Celsius or Fahrenheit user-selectable
Measurement Range:

Thermocouple Range

K-TYPE(0.1°C) -200°C to 1372°C, -328°F to 1999°F
J-TYPE(0.1°C) -210°C to 1200°C, -346°F to 1999°F
T-TYPE(0.1°C) -200°C to 400°C , -328°F to 752°F
E-TYPE(0.1°C) -220°C to 1000°C, -364°F to 1832°F

Calibration Range: -210°C to 1372°C, (-364°F to 1999°F)
Auto range: 0.1°C/1°C, 0.1°F/1°F
Accuracy: Accuracy is specified for operating temperatures over the range

of18°C to 28°C (64°F to 82°F), for 1 year, not incl uding thermocouple
error.(Read mode)
±(0.1%rdg + 1°C) range -60°C to 1372°C
±(0.1%rdg + 2°C) range -60°C to -220°C
±(0.1%rdg + 2°F) range -76°F to 1999°F
±(0.1%rdg + 4°F) range -76°F to -364°F

Simulation Accuracy: Measurement accuracy plus 1°C

ENVIRONMENTAL

Ambient Operating Ranges: 0°C to 50°C (32°F to 122°F) <80% R.H.
Storage Temperature: -20°C to 60°C (-4°F to 140°F) <70% R.H.

10

GENERAL

Display: 3½ digit liquid crystal display (LCD) with a maximum reading of1999.
Polarity: Automatic, positive implied, negative polarity indication.
Overrange: -OL is displayed.
Zero: Automatic.
Low battery indication: The “

drops below the operating level.

Measurement rate: 1 times/second.
Accuracy: Stated accuracy at 23°C±5°C, <75% R.H.
Dimensions: 195mm(H) x 92mm(W) x 53mm(D).
Weight: approx. 9 oz. (250g) including battery.
Input Connector: Accepts standard miniature thermocouple connectors (flat

blades spaced 7.9mm, center to center SMP type).

Battery Life: 100 hours typical with carbon zinc battery.
Auto power off: The meter key switch inactive for more than 90 minutes.
Temperature Coefficient: 0.1 times the applicable accuracy specification per

°C from 0°C to 18°C and 28°C to 50°C (32°F to 64°F and 82°F to 122°F).

Input Protection: 24V dc or 24V ac rms maximum input voltage on any

combination of input pins.

Maximum Differential Common Mode Voltage (Maximum Voltage
betweenT1 and T2 during measurement): 1volt.

” is displayed when the battery voltage

11

5.0 CL3152A Calibration Procedure

Note: The following calibration procedure should be performed only by

qualified technicians who have access to the items as following items:

Equipment: Thermocouple calibrator had better 10 times greater than the
measured meter.

1. Short CAL jumper and turn on the meter to INPUT range.

2. Press “

3. Input 35°C / K-type to the T1, then press “

display was showed 1300°C / T1 / SET / K.

4. Input 1300°C / K-type to the T1, then press “

display was showed 0°C / T1 / SET / K.

5. Input 0°C/K-type to the T1, then press “

was showed “-OL” then press “

35°C / T2 / SET / K.

6. Input 35°C / K-type to the T2, then press “

display was showed 1300°C / T2 / SET / K.

7. Input 1300°C / K-type to the T2, then press “

display was showed Out / K / °C / SET / T2.

8. Knob being with clockwise rotation 2 range and two knobs of lower left
corner are set to the position of the middle (horizontal).

9. Press “

jumper.

10. The calibration was completed.

” key display was showed 35°C / T1/ SET / K.

” key and wait for the

” key and wait for the

” key and wait for the display

” key and wait for the display was

” key and wait for the

” key and wait for the

” key and wait for the meter auto power off then remove

12

13

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from
date of purchase. OMEGA 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
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. 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
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 are not warranted, including but 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 it will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
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OMEGA assumes no responsibility as set forth in our basic WARRANTY / DISCLAIMER language, and additionally, purchaser will
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Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY
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The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.

FOR WARRANTY

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 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 2002 OMEGA ENGINEERING, INC.
All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic medium or
machine-readable from, in whole or in part, without prior written consent of OMEGA ENGINEERING, INC.

RETURNS, please have the following

WARRANTY / DISCLAIMER

RETURN REQUESTS / INQUIRIES

FOR NON-WARRANTY

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 problems relative to the
product.

REPAIRS, consult OMEGA for current

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