Omega Products CL3512 Installation Manual

OMEGA

CL3512

Digital Thermometer & Calibrator

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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 application.

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INTRODUCTION

This instrument is a portable 3½ digit, compact-sized digital thermometer
designed to use external K-type thermocouple as temperature sensor. Tem­perature indication follows Reference Temperature/Voltage Tables (N.I.S.T.
Monograph 175 Revised to ITS-90) for K-type thermocouples.

SAFETY INFORMATION

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

WARNING

To avoid electrical shock, do not use this instrument when voltages at the

measurement surface exceed 24V AC or DC.

WARNING

To avoid damage or burns, do not make temperature measurement in

microwave ovens.

CAUTION

Repeated sharp flexing can break the thermocouple leads. To prolong

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

symbol on the instrument indicates that the operator must refer to an

explanation in this manual.

1

SPECIFICATIONS

ELECTRICAL

Temperature Scale: Celsius or Fahrenheit user-selectable
Measurement Range: -40°C to 1350°C, (-40°F to 2000°F)
Calibration Range: -200°C to 1372°C, (-328°F to 2502°F)
Resolution: 1°C or 1°F, 0.1°C or 0.1°F
Accuracy: Accuracy is specified for operating temperatures over the range of

18°C to 28°C (64°F to 82°F), for 1 year, not including thermocouple error.

±(0.1% rdg + 1°C) on -40°C to 1350°C
±(0.1% rdg + 2°F) on -40°F to 2000°F

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.

Reading Rate: 2.5 times per second.
Input Connector: Accepts standard miniature thermocouple connectors (flat

blades spaced 7.9mm, center to center).

2

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.

GENERAL

Display: 3½ digit liquid crystal display (LCD) with maximum reading of 1999
Battery: Standard 9V battery.
Battery Life: 200 hours typical.
Dimensions: 190.7mm(H) x 90mm(W) x 53.4mm(D).
Weight: 440g.
Supplied Probe: 4 foot type "K" thermocouple bead probe (teflon tape

insulated). Maximum insulation temperature 260°C (500°F). Probe accu-

racy ±2.2°C or ±0.75% of reading (whichever is greater) from 0°C to 800°C.

3

OPERATING INSTRUCTIONS

Function Switch

The function switch limited to rotate in 180º range, the overlay OUTPUT ºF
refer to scale of the OUTPUT ºC only.

Selecting the Temperature Scale

Readings are 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/°F"key.

Selecting the Display Resolution

The thermometer allows two choices of resolution:

High resolution: 0.1°C or 0.1°F
Low resolution: 1.0°C or 1.0°F

To select the alternate display resolution, press the corresponding "0.1°/1°"
key.

Back-Light and Data-Hold Switch ( >2sec),( H ):

Press this button briefly to activate DATA-HOLD mode. The " H " annunciator
is displayed.

Press this button for 2 seconds to turn the Back-Light on. As this also
activates the DATA-HOLD mode, briefly press the button to return to normal
display. To turn the Back-Light off press again for 2 seconds.

4

MAX Mode

Pressing the Max key to enter the MAX mode. The thermometer then
records and updates the maximum absolute values and the MAX annunciator
appears on the display. Pressing the MAX key again to exit the MAX recording
mode.

T1 , T2 Temperature Measurement

1. The function switch indicates which input is selected for display; T1

thermocouple, T2 thermocouple.

2. Connect a type K thermocouple to the jack on the instrument. Place the

probe or thermocouple tip on or in the material to be measured and take the

temperature reading directly from the display.

Thermocouple Calibration

1.Connect the proper K-type thermocouple wire and miniature male SMP

connector to the CL3512 output.

2. Connect the other end of the thermocouple wire to the instrument to be

calibrated.

3. Using the range switch and the COARSE / FINE adjust knobs set the

CL3512 to the output required as read on the LCD.

4.If output over -40°C to 1350°C ( -40°F to 2000°F ) range, Please refer to

Other Type Thermocouple Calibration.

5

Other Type Thermocouple Calibration

1. Connect the two proper thermocouple wires and miniature male SMP

connector to the CL3512 output.

2. Connect the other end of one thermocouple wire to the instrument to be

calibrated and other end of one thermocouple wire to the monitoring

reference thermometer.

3. Using the range switch and the COARSE / FINE adjust knobs set the

CL3512 to the output required as read on the indicating thermometer.

6

OPERATOR MAINTENANCE

WARNING

To avoid possible electrical shock, disconnect the thermocouple

connectors from the thermometer before removing the cover.

Battery Replacement

Power is supplied by a 9 volt "transistor" battery. The " " appears on 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.

7

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 cover age 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 W ARRANTY 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 V OID if the unit shows evidence of ha ving 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 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.

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 follo wing

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 2000 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.

WARRANTY / DISCLAIMER

RETURN REQUESTS / INQUIRIES

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 problems relative to the
product.

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Process Measurement and Control?

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