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Servicing North America:

USA:

One Omega Drive, P.O. Box 4047

ISO 9001 Certified

Stamford CT 06907-0047
TEL: (203) 359-1660

FAX: (203) 359-7700

e-mail: [email protected]

Canada:

976 Bergar
Laval (Quebec) H7L 5A1, Canada
TEL: (514) 856-6928

FAX: (514) 856-6886

e-mail: [email protected]

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:

En Espan˜ol: (001) 203-359-7803

e-mail: [email protected]

FAX: (001) 203-359-7807

[email protected]

Servicing Europe:

Benelux:

Postbus 8034, 1180 LA Amstelveen, The Netherlands
TEL: +31 (0)20 3472121

FAX: +31 (0)20 6434643

Toll Free in Benelux: 0800 0993344
e-mail: [email protected]

Czech Republic:

Frystatska 184/46, 733 01 Karviná, Czech Republic
TEL: +420 (0)59 6311899

FAX: +420 (0)59 6311114

Toll Free: 0800-1-66342

e-mail: [email protected]

France:

11, rue Jacques Cartier, 78280 Guyancourt, France
TEL: +33 (0)1 61 37 29 00

FAX: +33 (0)1 30 57 54 27

Toll Free in France: 0800 466 342
e-mail: [email protected]

Germany/Austria:

Daimlerstrasse 26, D-75392 Deckenpfronn, Germany
TEL: +49 (0)7056 9398-0

FAX: +49 (0)7056 9398-29

Toll Free in Germany: 0800 639 7678
e-mail: [email protected]

United Kingdom:

One Omega Drive, River Bend Technology Centre

ISO 9002 Certified

Northbank, Irlam, Manchester
M44 5BD United Kingdom 
TEL: +44 (0)161 777 6611

FAX: +44 (0)161 777 6622

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

OMEGAnet

®

Online Service 

Internet e-mail

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, human applications.

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’s 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 malfunctions, 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 having been 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, EXPRESS 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. Purchase Order 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.  Purchase Order number to cover the COST 

of the repair,

2. Model and serial number of the 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 2003 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 the
prior written consent of OMEGA ENGINEERING, INC.

Summary of Contents for HHT21A

Page 1: ...s Flowmeters Flow Computers 䡺 Air Velocity Indicators 䡺 Turbine Paddlewheel Systems 䡺 Totalizers Batch Controllers pH CONDUCTIVITY 䡺 pH Electrodes Testers Accessories 䡺 Benchtop Laboratory Meters 䡺 Controllers Calibrators Simulators Pumps 䡺 Industrial pH Conductivity Equipment DATA ACQUISITION 䡺 Data Acquisition Engineering Software 䡺 Communications Based Acquisition Systems 䡺 Plug in Cards for Ap...

Page 2: ...er 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 th...

Page 3: ...The socket on the front of the instrument is for use with a remote charger Only use model R 5 115 Vac or R 6 230 Vac rechargers to charge the instrument 5 The HHT21A has a laser beam light source Do not view the laser beam directly as it could be hazardous to the eyes Do not point the laser beam into another person s eyes Do not view the laser beam with telescopic devices 6 With exception of repla...

Page 4: ...t in charging network which works in conjunction with the optional NiCad batteries The optional recharger plugs into the single jack located next to the optical lens at the front end of the instrument Fourteen to sixteen hours is required for a complete recharge When the battery voltage in the HHT21A is getting low the display will blink LO BAT to indicate that the batteries need to be replaced NO...

Page 5: ...e laser beam with telescopic devices Time Base Crystal controlled Power Source 4 AA batteries Recharger socket provided for optional rechargeable batteries Recharger Input Max input 7 8 Vdc 50mA Temperature 41 F 5 C to 104 F 40 C Humidity Maximum relative humidity 80 for temperature up to 88 F 31 C decreasing linearly to 50 relative humidity at 104 F 40 C 4 Remote Internal Switch Internal Optics L...

Page 6: ...bushing at the base of the handle 3 When the trigger is released the HHT21A will hold the last measurement taken and display it for up 90 seconds On very small shafts the HHT21A will work down to a reflective tape size of approximately 1 8 inch 3 2 mm square However with this small tape size it would be necessary to operate the instrument very close to the rotating shaft and insure it is held stea...

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