Omega HHMM257 User guide

User’s Guide

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HHMM257

Pinless Moisture Meter

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omega.com [email protected]

Servicing North America:

U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047

ISO 9001 Certified

Canada: 976 Bergar, Laval (Quebec), H7L 5A1 Canada

Stamford, CT 06907-0047 USA
Toll-Free: 1-800-826-6342 Tel: [phone]
FAX: [phone] e-mail: [email protected]

Toll-Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] e-mail: [email protected]

For immediate technical or application assistance:

U.S.A. 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

Mexico TEL: [phone] FAX: [phone]
Latin America e-mail: [email protected]

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Servicing Asia:

China: 1698 Yi Shan Road, Unit 102, Min Hang District

Shanghai, China 201103 P.R.C.
Hotline: [phone] 619 0559
e-mail: [email protected]

Servicing Europe:

Benelux: Toll-Free: 0800 099 3344 TEL: [phone]

Czech Republic: Frystatska 184, 733 01 Karviná, Czech Republic

France: Toll-Free: 0800 466 342 TEL: [phone]

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

United Kingdom: OMEGA Engineering Ltd.

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FAX: [phone] e-mail: [email protected]

TEL: [phone] FAX: [phone]
e-mail: [email protected]

FAX: [phone] e-mail: [email protected]

Toll-Free: 0800 8266342 TEL: [phone]
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Irlam, Manchester M44 5BD United Kingdom
Toll-Free: 0800-488-488 TEL: [phone]
FAX: [phone] e-mail: [email protected]

It is the policy of OMEGA Engineering, Inc. 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 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.

User's Guide

Pinless Moisture Meter

Model HHMM257

HHMM257

Introduction

Congratulations on your purchase of the Extech MO257 Pinless Moisture Meter. The pinless
moisture sensor monitors the moisture in wood and other building materials without causing surface
damage. High frequency sensing technology allows the meter to take non-invasive moisture
measurements. User programmable alarms alert the user if moisture measurements exceed alarm
set-points. This meter is shipped fully tested and calibrated and, with proper use, will provide years of
reliable service.

Meter Description

1. Measurement sensor

2. Power ON-OFF button

3. LCD display

4. Measure (MEAS) button

5. UP and BACKLIGHT button

6. SET button

7. DOWN button

Battery compartment located on rear of unit

LCD Display

1. Low Battery icon

2. Main LCD display

3. MAX reading

4. MIN reading

5. HOLD function

6. Measurement alert

7. MAX mode icon

8. MIN mode icon

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MO257-EU-EN -V1.2 04/12

Battery Replacement

1. Turn off the meter

2. Remove the Philips head screw located on the rear of the unit

3. Lift off the rear battery cover

4. Replace the three (3) ‘AAA’ 1.5V batteries

5. Secure the rear battery cover
You, as the end user, are legally bound (EU Battery ordinance) to return all used

batteries, disposal in the household garbage is prohibited! You can hand over your
used batteries / accumulators at collection points in your community or wherever batteries
/ accumulators are sold!

Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the
end of its lifecycle

3

MO257-EU-EN -V1.2 04/12

Operation

Pinless Moisture Measurements

1. Press the power button to turn the meter on.

2. As described below, you must calibrate the meter before first use.

3. To calibrate, press the MEAS button immediately after powering on the meter. The display will

audibly beep and visually flash the CAL display icon. Keep the measurement sensor at least 3
to 4” (8 to 10 cm) from any object during calibration.

4. When the calibration is complete the beeping and flashing stop. The calibration reading must

not exceed 0.5. If so, re-calibrate ensuring that hands or other objects are kept clear of the
measurement sensor.

5. The meter should be calibrated whenever it is moved from one measurement area to another.

6. To take a measurement, hold the meter and position the sensor so that it is very near or

directly touching the surface under test. The meter can sense moisture to a depth of 0.79 to

1.57” (20 to 40mm).

7. IMPORTANT NOTE: The position of the hand can greatly affect a reading. Do not move or

reposition the hand that holds the meter while taking measurements or when calibrating the
unit.

8. The LCD indicates a relative moisture reading in numeric digits from 0.0 to 100.0 and with

programmable alarm alerts (DRY, RISK, and WET).

9. Press the MEAS button to HOLD (freeze) a reading on the LCD (the HOLD icon will appear on

the LCD). The meter will hold the reading for 30 seconds before automatically shutting the
meter down.

10. The MAX and MIN display areas indicate the highest and lowest readings encountered since

the measurement session was started.

11. If the battery symbol appears or if the meter does not switch ON, replace the batteries.

Alarm Settings

Two high alarm points can be set for Moisture measurements: A RISK Alarm (0 to 50 setting range
with a default setting of 30 units) and a WET Alarm (50 to 100 setting range with a default setting of
60 units).

Moisture Alarm Setup Procedure:

1. Press the MEAS button to place the meter in HOLD mode to change the Alarm settings.

2. Press the SET button. The RISK display icon will appear flashing on the LCD indicating that a
RISK alarm can now be programmed.

3. Use the up/down buttons to select the desired RISK Alarm value.

4. Press the SET button when the desired setting is displayed.

5. The WET icon will appear flashing on the LCD indicating that the WET Alarm is ready to be
programmed.

6. Use the up/down buttons to select the desired Wet Alarm setting.

7. Press SET to complete the programming.

8. Now, if the moisture measurement is higher than the RISK setting, the meter will beep once
every two seconds and if the moisture measurement is higher than the WET setting the meter
will beep four times per second.

9. Press the MEAS button to exit HOLD mode.

4

MO257-EU-EN -V1.2 04/12

Auto Power Off

To conserve battery energy, the meter will enter a sleep mode after approx. 30 minutes of inactivity.
Press the power button to wake the meter.

Backlit LCD

Press the up/backlight button to switch the backlighting ON or OFF.

Specifications

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Moisture Range 0.0 to 100.0 Relative only

Measurement Depth 20 to 40mm (0.79 to 1.57”)

Display type Backlit LCD

Display digits Three (3) numeric displays; each displaying from 0.0 to 100.0

Display icons HOLD, DRY, RISK, WET, MIN, MAX and low battery icon

Operating Temperature 4 to 43°C (40 to 110°F)

Operating Humidity 90%, 0-30°C (32-86°F), 75%, 30-40°C (86-104°F),

Power Supply Three (3) 1.5V ‘AAA’ batteries

Auto Power Off (APO) After 30 minutes of inactivity

Dimensions 235 x 63 x 28mm (9.2 x 2.5 x 1.1”)

Weight 218g (7.7oz)

45%, 40-50°C (104-122°F)

Moisture Comparison Table (typical)

Material Display units Moisture status

Gypsum

Cement

Wood

< 30 DRY

30 - 60 RISK

> 60 WET

< 25 DRY

25 - 50 RISK

> 50 WET

< 50 DRY

50 - 80 RISK

> 80 WET

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MO257-EU-EN -V1.2 04/12

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 e xcessive corrosion; or current, heat, moisture or vibration; improper specification;
misapplication; misuse or other operating conditions outside of OMEGA’s control. Components in
which wear is not warranted, include but are 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 the company will be as specified and free of defects. OMEGA MAKES
NO OTHER WARRANT I E S OR REPRESE N T A T I O N S OF AN Y KIND WHATSOE V E R ,
EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES
INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOS E A RE HEREBY DISCL AI MED. LIMITA TION OF LIABILI TY: The remedie s 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.

RETURN REQUESTS/INQUIRIES

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

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.

OM E GA’ s poli c y is to mak e runn i ng ch a ng es, not mo d el c h ang e s , wh e nev e r an im pro v e me n t is po s si ble .
This affords our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2012 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, repro-

duced, 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.

RETURNS, please have the

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 theproduct, and

3. Repair instructions and/or specific problems

relative to the product.

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