Omega Products HHM72 Installation Manual

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA ... Of Course!

TEMPERATURE

3

o Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies
o Wire: Thermocouple, RTD & Thermistor

3

o Calibrators & Ice Point References

3

o Recorders, Controllers & Process Monitors

3
3

o Infrared Pyrometers

PRESSURE / STRAIN FORCE

3

o Transducers & Strain Gauges
o Load Cells & Pressure Gauges

3

o Displacement Transducers

3

o Instrumentation & Accessories

3

FLOW / LEVEL

3

o Rotameters, Gas Mass Flowmeters & Flow Computers
o Air Velocity Indicators

3

o Turbine / Paddlewheel Systems

3

o Totalizers & Batch Controllers

3

pH/CONDUCTIVITY

3

o pH Electrodes, Testers & Accessories
o Benchtop / Laboratory Meters

3
3

o Controllers, Calibrators, Simulators & Pumps
o Industrial pH & Conductivity Equipment

3

M-3478/0899 99-MAN 100180 v1 09/99

DATA ACQUISITION

3

o Data Acquisition & Engineering Software

3

o Communications-Based Acquisition Systems
o Plug-in Cards for Apple, IBM & Compatibles

3

o Datalogging Systems

3

o Recorders, Printers & Plotters

3

HEATERS

3

o Heating Cable
o Cartridge & Strip Heaters

3

o Immersion & Band Heaters

3

o Flexible Heaters

3

o Laboratory Heaters

3

ENVIRONMENTAL MONITORING AND CONTROL

3

o Metering & Control Instrumentation
o Refractometers

3

o Pumps & Tubing

3

o Air, Soil & Water Monitors

3

o Industrial Water & Wastewater Treatment

3
3

o pH, Conductivity & Dissolved Oxygen Instruments

OL

DC

ON

ZERO

600V CAT III - 1500A

!

150A

1500A

OFF

OUTPUT:
1500 A: 1 mV/A
150 A: 10 mV/A

HHM75

AC/DC CURRENT PROBE

®

http:/www.omega.com

e-mail:

[e-mail]

Model HHM72
Model HHM75

AC/DC Current Probes

WARRANTY/DISCLAIMER

.

d

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.

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.

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.

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.

OMEGAnetSM On-Line Service:

http://www.omega.com

Internet e-mail: [e-mail]

Servicing North America:

USA: One Omega Drive, Box 4047

ISO 9001 Certified Stamford, CT 06907-0047

Tel: [phone] FAX: [phone]
e-mail: [e-mail]

Canada: 976 Bergar

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

For Immediate Technical or Application Assistance:

USA and Canada: Sales Service: 1-800-826-6342 1-800-TC-OMEGA

Customer Service: 1-800-622-2378 / 1-800-622-BEST
Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN
TELEX: 996404 EASYLINK 62968934 CABLE: OMEGA

Mexico and Tel: (95) 800-TC-OMEGA

SM

FAX: [phone]

Latin America: En Espanol: [phone] ext: 2203

e-mail: [e-mail]

SM

SM

SM

Servicing Europe:

Benelux: Postbus 8034,1180 LA Amstelveen, The Netherlands

Czech Republic: Ostravska 767, 733 01 Karvina

France: 9, rue Denis Papin, 78190 Trappes

Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

United Kingdom: 25 Swannington Road, P.O. Box 7, Omega Drive,

150 9002 Certified Broughton Astley, Leicestershire, Irlam, Manchester,

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 connecte
applications.

Tel: [phone] FAX: [phone]
Toll Free in Benelux: 06 0993344 e-mail: [e-mail]

Tel: [phone] FAX: [phone]
e-mail: [e-mail]

Tel: [phone] FAX: [phone]
Toll Free/France: 0800-4-06342 e-mail: [e-mail]

Tel: [phone] FAX: [phone]
Toll Free in Germany: 0130 11 21 66
e-mail: [e-mail]

LE9 6TU, England M44 5EX, England
Tel: [phone] Tel: [phone]
FAX: [phone] FAX: [phone]

Toll Free in England: 0800-488-488

e-mail: [e-mail]

Maintenance

War ni ng

· For maintenance use only specified replacement parts.

· Avoid electrical shock: do not attempt to perform any servicing unless

you are qualified to do so.

· Avoid electrical shock and/or damage to the instrument: do not get
water or other foreign agents into the case. Turn the current probe
OFF and disconnect the unit from all circuits before opening the case.

· Also see warning on page 2.

Bat tery Repl acement

· When the probe is turned on, the green LED should light up. If it does
not, replace the 9 V battery. Completely disconnect the probe from the
circuit under test and from the oscilloscope or measuring instrument.
Turn the probe ÒOffÓ, unscrew the battery compartment screw and
remove cover. Replace the battery and put the cover back on.

· Do not replace the battery while the probe is in use.

Cleaning

· Clean the body of the clamp with a cloth lightly moistened with soapy
water. Wipe clean with a cloth moistened with clean water and dry. Do
not use solvent.

Table of Contents

Warning........................................................................................................ 2

International Electrical Symbols.................................................................. 2

Receiving Your Shipment............................................................................ 2

Packaging .................................................................................................... 3

Description ................................................................................................... 3

Specifications............................................................................................... 4

DMM/Display Compatibility ....................................................................... 11

Operating Procedure ................................................................................. 12

Making Measurements with the Models HHM72 and HHM75.......... 12

DC Measurement................................................................................ 12

AC Measurement................................................................................ 13

Indicator Lights.................................................................................... 13

Auto-Off............................................................................................... 13

Operation Examples ........................................................................... 14

Tips for Getting the Best Accuracy .................................................... 17

Typical Response Curves .................................................................. 18

Maintenance .............................................................................................. 20

Warning............................................................................................... 20

Battery Replacement .......................................................................... 20

Cleaning .............................................................................................. 20

20