Omega CL250 User guide

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

✭✵

Gauges

✭✵

Load Cells & Pressure

✭✵

Gauges

✭✵

Displacement Transducers

✭✵

Instrumentation &

✭✵

Accessories

FLOW/LEVEL

✭

✵

Rotameters, Gas Mass
Flowmeters
& Flow Computers

✭✵

Air Velocity Indicators

✭✵

T urbine/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

✭✵

Datalogging 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

Where Do I Find Everything I Need

for Process Measurement and Control?

OMEGA …Of Course!

M3121/0798

http://www.omega.com

e-mail: [email protected]

CL250

Hand-Held

Frequency Calibrator

OMEGAnetSMOn-Line Service Internet e-mail

http://www.omega.com [email protected]

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.

Benelux:

Postbus 8034, 1180 LA Amstelveen,
The Netherlands
Tel: [phone] FAX: [phone]
Toll Free in Benelux: 06 0993344
e-mail: [email protected]

Czech Republic:

ul. Rude armady 1868, 733 01 Karvina-Hranice,
Czech Republic
Tel: 420 ( 69 ) 6 311627 FAX: [phone]
e-mail: [email protected]

France:

9, rue Denis Papin, 78190 Trappes
Tel: [phone] FAX: [phone]
Toll Free in France: 0800-4-06342
e-mail: [email protected]

Servicing Europe:

USA and Canada:

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

SM

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

SM

Engineering Service: 1-800-872-9436 /

1-800-USA-WHEN

SM

TELEX: 996404 EASYLINK: 62968934

CABLE: OMEGA

USA: ISO 9001 Certified

One Omega Drive, Box 4047
Stamford, CT 06907-0047
Tel: [phone]
FAX: [phone]
e-mail: [email protected]

Servicing North America:

For immediate technical or application assistance:

Mexico and Latin America:

Tel: (95) 800-TC-OMEGA

SM

FAX: [phone]
En Espan~ol: [phone]
e-mail: [email protected]

Germany/Austria:

Daimlerstrasse 26, D-75392
Deckenpfronn, Germany
Tel: [phone] FAX: [phone]
Toll Free in Germany: 0130 11 21 66
e-mail: [email protected]

United Kingdom: ISO 9002 Cer

tified

•25 Swannington Road, Broughton
Astley, Leicestershire, LE9 6TU,
England
Tel: [phone]
FAX: [phone]

•P.O. Box 7, Omega Drive, Irlam,
Manchester, M44 5EX, England
Tel: [phone]
FAX: [phone]

Toll Free in England: 0800-488-488
e-mail: [email protected]

Canada:

976 Bergar
Laval (Quebec) H7L 5A1
Tel: [phone]
FAX: [phone]
e-mail: [email protected]

FOR WARRANTY 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 problems
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

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 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.

WARRANTY/DISCLAIMER

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 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.

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.

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User’s Guide

GENERAL DESCRIPTION

The CL250 Frequency calibrator is designed to be a
high accuracy, simple to use frequency standard for
calibrating process control instrumentation. The
CL250 can generate or read frequencies ranging from
1 count per minute to 100 KHz allowing it to be used
for a wide range of flow measuring instrumentation.

When operated in the source mode the user can
quickly step the output in 10% of range increments or
make smaller changes using the scroll keys.

INSTALLATION

UNPACKING

Remove the Packing List and verify that all
equipment has been received. If there are any
questions about the shipment, please call Omega’s
Customer Service Dept. at
1-800-826-6342.

When you receive the shipment, inspect the container
and equipment for any signs of damage. Note 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 reshipment is necessary.

SET-UP

Before beginning, become familiar with the keypad
layout and the configuration of the input/output

jacks. Remember, these jacks are used in multiple
configurations so pay careful attention to the jack
identification label on back of unit and how the test
leads are connected for the specific application.

OPERATING PROCEDURE

1. Turn on power and select the desired range by
depressing the range select key. Your range choices
are CPM, Hz, and KHz.

2. Make connections as required, refer to the operat­ing modes section or the rear jack identification
label for connection information.

3. The step and scroll keys adjust the output value up
or down. Holding the scroll key continuously for
several seconds will increase the scroll rate. The
step key allows the user to make larger changes
quickly and is preset to step in 10% of range incre­ments.

OPERATING MODES

1. When operating in the output mode the CL250 has
the capability to drive loads up to 1 Kohm with
TTL levels. The standard output amplitude is a 5
volt ± 10% p-p square wave.

Figure 1

2. When operating in the read (input) mode the CL250
can monitor frequencies with amplitudes ranging
from 1 to 100 volts. The waveform shape can be
square, sine or triangular.

Figure 2

ACCURACY

The CL250 is checked against an NIST Traceable
reference before shipment to verify that each range
falls within the 0.01% ± 1 count of full scale. Since
the accuracy of this particular product is based on a
very stable quartz crystal, the CL250 should stay well
within its operating specification without the need for
calibration for periods of 1 year or more.

SPECIFICATIONS

Input/Output
Ranges 0 to 1000 CPM

0 to 1000 Hz
0 to 100.0 KHz

Accuracy ± 0.01% ± 1 Count
Max Load Driving 5 mA (1 Kohm load min)
Input Signal

Amplitude 1 to 100 Volts
Output Waveform 5V ± 10%, Square wave
Operating Temp. 0 to 50°C
Storage Temp. -20 to 60°C
Temp. Stability .005% F.S./°C
Power

1

9V alkaline battery

Weight 12 oz.

Notes:

1

A low battery indication is given at 5.5 volts.

MAINTENANCE

Generally, with normal usage, this calibrator should
hold its rated specifications for at least 12 months. If
after the stated warranty period, the device falls out
of calibration, it can be returned to Omega for re­calibration. Please call 1-800-826-6342 for pricing and
return information.