Omega hh12c Operating Instructions Manual

HH12C

DIGITAL THERMOMETER

Servicing North America:

U.S.A. Omega Engineering, Inc.

Headquarters: Toll-Free: 1-800-826-6342 (USA & Canada only)

Customer Service: 1-800-622-2378 (USA & Canada only)

Engineering Service: 1-800-872-9436 (USA & Canada only)

Tel: [phone] Fax: [phone]

e-mail: [e-mail]

For Other Locations Visit omega.com/worldwide

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.

INTRODUCTION

This instrument is a portable 4½ digit, compact-sized
digital thermometer designed to use external K-type
thermocouples as temperature sensor. Temperature
indication follows National Bureau of Standards and
IEC 584 temperature/voltage tables for K-type
thermocouples. Two K-type thermocouple are
supplied with the thermometer.

SAFETY INFORMATION

It is recommended that you read the safety and

operation instructions before using this thermometer.

WARNING

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

measurement surface over 24V AC or 60V 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.

SPECIFICATIONS

ELECTRICAL

Temperature Scale: Celsius or Fahrenheit user-selectable
Measurement Range:

-200°C to 1372°C, -328°F to 2501°F

Auto range: 0.1°C/1°C, 0.1°F/1°F
Accuracy: Accuracy is specified for operating tempera-

tures over the range of 18°C to 28°C (64°F to 82°F), for

1 year, not including thermocouple error.

±(0.1%rdg+0.5°C) on -50°C to 1372°C

±(0.1%rdg+2°C) on -50°C to -200°C

±(0.1%rdg+1°F) on -58°F to 2501°F

±(0.1%rdg+4°F) on -58°F to -328°F

Temperature Coefficient:

0.1 times the applicable accuracy specification per °C

fr

om 0°C to 18°C and 28°C to 50°C (32°F to 64°F and

82°F to122°F).

Input Protection:

60V dc or 24V ac rms maximum input voltage on any

combination of input pins.

Input Connector:

Accepts standard miniature thermocouple connectors

(flat blades spaced 7.9mm, center to center).

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: 4½ digit liquid crystal display (LCD) with max-

imum reading of 19999.

Low battery indication: The “

” is displayed when the

battery voltage drops below the operating level.

Measurement rate: 1 time/second.
Operating environment: 0°C to 50°C at<70% R.H.
Storage temperature: -20°C to 60°C, 0 to 80% R .H. with

battery removed from meter.

Accuracy: Stated accuracy at 23°C±5°C, <75% R.H.
Battery: Standard 9V battery (NEDA 1604, IEC 6F22).
Battery Life: 100 hours typical with carbon zinc battery.
Dimensions: 210mm(H) x 65mm(W) x 35mm(D).
Weight: approx. 292g including battery.
Supplied Wire: 4 feet type “K” thermocouple bead wire

(PTFE tape insulated). Maximum insulation tempera­ture 260°C (500°F). Wire accuracy ±2.2°C or ±0.75%
of reading (whichever is greater) from 0°C to 800°C.

OPERATING INSTRUCTIONS

1. “°C/°F” Button: Selecting the Temperature Scale

Reading 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.

2. Single-Thermocouple Temperature Measure­ment

The thermometer displays the temperature of the
thermocouple that is connected to the selected input.
Press the “T2” key to display the temperature of the
thermocouple connected to the T2 input. Press the “T1”
key to display the temperature of the thermocouple
connected to the T1 input. The input selection cursor
indicates which input is selected.

3. T2 or Differential Temperature Measurement

T2 thermocouple or Differential temperature
measurement is selected by pressing the “T2/T1-T2”
key. This causes the thermometer to display the
temperature difference between the two thermocouples
(the temperature of thermocouple T1 minus the
temperature of thermocouple T2). The selection is
indicated by the input selection cursor.

4. “HOLD” Button

Press the “HOLD” key to enter the Data Hold mode,
the “HOLD” annunciator is displayed. When HOLD
mode is selected, the thermometer held the present
readings and stops all further measurements. Press the
“HOLD” key again cancels HOLD mode, causing the
thermometer to resume taking measurements.

5. “REL” Button

Press “REL” key to enter Relative mode, zero the
display, and store the displayed reading as a reference
value and annunciator REL is displayed. Pressing
“REL” key over 2 seconds to exit the relative mode.

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INSTRUCTION

SHEET

M5604/0917

6. “APO” Button

Pressing “APO ” key to trigger on or off APO mode,
and then APO annunciator will appear or disappear on
the display. Power is automatically turn off, if no opera­tion for a period of time, and “APO” annunciator is dis­played at upper-left when APO function is enabled.

7. “MIN/MAX” Button

Press “MIN/MAX” once to begin recording MIN and
MAX. Press “MIN/MAX” to select MIN or MAX or
MAX-MIN or AVG Hold down for 2 seconds to exit
MIN/MAX function.

In the MIN/MAX record mode can not power off,
must leave MIN/MAX record mode then power off.

OFFSET ADJUSTMENT

The OFFSET control is set at the factory to allow for the

variations found in standard thermocouples. By adjusting
the OFFSET control, you can optimize measurement ac­curacy for a particular thermocouple at a particular tem­perature.

Adjusting for T1 or T2 Accurate Measure­ments

1. Connect the thermocouple to the T1 or T2 input con­nector and turn the thermometer on.

2. Place the thermocouple in a known, stable temperature
environment at or near the t emperature you wish to
measure, and allow the readings to stabilize.

3. Slowly adjust the OFFSET control so that the thermom­eter reading matches the temperature of the known en­vironment. Leave sufficient time between adjustments
to allow for measurement lag.

4. The calibration of the thermometer-thermocouple com­bination is now optimized for measure ments near the
temperature measured in step 2.

Resetting the OFFSET Control

To return the OFFSET control to the factory setting

without having to recalibrate the thermometer, perform the
following procedure:

1. Connect a thermocouple that is in good working order to
the input that is to be adjusted.

2. Place the thermocouple in an ice-water bath and allow
the readings to stabilize.

3. Slowly adjust the OFFSET control until the thermome­ter reads 0°C (32°F).

Probe Detector

The red LED will be on when no K-type thermocouple

probe is inserted into the TEMP input of the meter, and
will be off after K-type thermocouple probe is inserted.
If the red LED stays on when thermocouple probe is at­tached, check the thermocouple probe which might be
damaged.

OPERATOR MAINTENANCE

WARNING

To avoid possible electrical shock, disconnect the

thermocouple connectors from the th

ermometer before

removing the cover.

Battery Replacement

1. Power is supplied by 9V (NEDA 1604, IEC 6F22).

2. The “

” appears on the LCD display when replace-

ment is needed.

3. Remove the battery from battery contacts.

4. When not use for long time remove battery.

5. Don’t keep in place with high Temp, or high humidity.

Cleaning

Periodically wipe th e case with a damp cloth and deter-

gent, do not use abrasives or solvents.

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Process Measurement

and Control?

OMEGA…Of Course!

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TEMPERATURE

Thermocouple, R TD & Thermistor Probes,

Connectors, Panels & Assemblies
Wire: Thermocoup le, RTD & Thermistor
Calibrators & Ice Point References
Recorders, Controllers & Process Monitors
Infrared Pyro meters

PRESSURE, STRAIN AND FORCE

Transducers & Stra in Gages
Load Cells & Pressure Gages
Displacement Trans ducers
Instrumentat ion & Accessories

FLOW/LEVEL

Rotameter s, Gas Mass Flowmeters & Flow Com-

puters
Air Velocit y Indicators
Turbine/Pad dlewheel Systems
Totalizer s & Batch Controllers

pH/CONDUCTIVITY

pH Electrodes, Testers & Accessories
Benchtop/Laboratory Meters
Controllers, C alibrators, Simulators & Pumps
Industr ial pH & Conductivity Equipment

DATA ACQUISITION

Data Acquis ition & Engineering Software
Communica tions-Based Acquisition Systems
Plug-in Cards for Apple, IBM & Compatibles
Datalogging Systems
Recorders, Printers & Ploers

HEATERS

Heating Cab le
Cartridge & Str ip Heaters
Immersion & Band Heaters
Flexible Heaters
Laboratory Heaters

ENVIRONMENTAL
MONITORING AND CONTROL

Metering & Control Instrumentation
Refractome ters
Pumps & T ubing
Air, Soil & Water Mo nitors
Industr ial Water & Wastewater Treatment
pH, Conductivity & Dissolved Oxygen

Instruments

Made in Taiwan

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 OMEG

A, 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
con

ditions 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 if 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 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 act

ivity; 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 PROCE SSING
DELAYS). The assigned AR number should then be marked on the
outside of the return package and on any correspondence.

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 or
calibration,

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 2017 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.