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OMEGA
HH501DK
Digital Thermometer
INTRODUCTION
This instrument is a portable 3½ digit, compact-sized digital thermometer
designed to use external K-type thermocouple as temperature sensor. Tem-
perature indication follows Reference Temperature/Voltage Tables (N.I.S.T.
Monograph 175 Revised to ITS-90) for K-type thermocouples.
SAFETY INFORMATION
Itisrecommendedthatyoureadthesafetyandoperationinstructionsbefore
using the thermometer.
WARNING
To avoid electrical shock, do not use this instrument when voltages
at the measurement surface exceed 24V AC or 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.
1
SPECIFICATIONS
ELECTRICAL
Temperature Scale: Celsius or Fahrenheit user-selectable
Measurement Range: -50°C to 1300°C, (-58°F to 2000°F)
Resolution: 1°C or 1°F, 0.1°C or 0.1°F
Accuracy: Accuracy is specified for operating temperatures over the range of
18°C to 28°C (64°F to 82°F), for 1 year, not including thermocouple error.
±(0.3% rdg + 1°C) -50°C to 1000°C
±(0.5% rdg + 1°C) 1000°C to 1300°C
±(0.3% rdg + 2°F) -58°F to 2000°F
Temperature Coefficient: 0.1 times the applicable accuracy specification
per °C from 0°C to 18°C and 28°C to 50°C (32°F to 64°F and 82°F to 122°F).
Input Protection: 24V dc or 24V ac rms maximum input voltage on any
combination of input pins.
Reading Rate: 2.5 times per second.
Input Connector: Accepts standard miniature thermocouple connectors (flat
blades spaced 7.9mm, center to center).
2
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: 3½ digit liquid crystal display (LCD) with maximum reading of 1999.
Battery: Standard 9V battery.
Battery Life: 200 hours typical with carbon zinc battery.
Dimensions: 192mm(H) x 91mm(W) x 52.5mm(D).
Weight: 365g.
3
OPERATING INSTRUCTIONS
Selecting the Temperature Scale
ReadingsaredisplayedineitherdegreesCelsius(°C)ordegreesFahrenheit(°F).
To change the temperature scale, press the "°C" or "°F"key.
Selecting the Display Resolution
The thermometer allows two choices of resolution:
High resolution: 0.1°C or 0.1°F
Low resolution: 1.0°C or 1.0°F
To select the alternate display resolution, press the corresponding "0.1°/1°"
key.
HOLD Mode
Press " HOLD" button to toggle in and out of Hold mode, In the Hold mode, the
" H " annunciator is displayed. (The Hold mode may be exited when changing
function.)
Display Back-Light
Pressing the " " key to toggle turn on or turn off the Back-Light.
4
MAX Mode
Pressing the Max key to enter the MAX mode. The thermometer then records
andupdatesthemaximumabsolutevaluesandtheMAXannunciatorappears
on the display. Pressing the MAX key again to exit the MAX recording mode.
In the MAX mode, press HOLD key to stop the recording, press HOLD again
to resume recording.
T1,T2,T3,T4, T1-T2,T1-T3,T1-T4 Temperature Measurement
1. The function switch indicates which input is selected for display; T1
thermocouple, T2 thermocouple,T3 thermocoupleor, T4 thermocouple or
the difference between the two thermocouples (T1-T2, T1-T3, T1-T4).
2. Connect a type k thermocouple to the jack on the instrument. Place the
probe or thermocouple tip on or in the material to be measured and take the
temperature reading directly from the display.
5
MAINTENANCE
WARNING
To avoid possible electrical shock, disconnect the thermocouple
connectors from the thermometer before removing the cover.
Battery Replacement
Power is supplied by a 9 volt "transistor" battery. (NEDA 1604, IEC 6F22). The
"
"appearsontheLCDdisplaywhenreplacementisneeded. Toreplacethe
battery, remove the two screws from the back of the meter and lift off the
battery cover. Remove the battery from battery contacts.
6
HH501DK CALIBRATION PROCEDURE
Note: The following calibration procedure should perform only by qualified technicians
who have access to the items as following.
Equipment: The class of calibrator had better 10 times greater than the measured meter.
Temperature Calibration
Insert the K type thermocouple to the female connector, and the other side of this
probe to Temperature Calibrator and connect output to the voltage meter. We
must allow the K type to stabilize for at least 1 minute and make sure “+” and “-“
polarity is right position.
1. Set the range to the T1/0.1°C, and then apply 0°C to T1 input (T2 input open)
adjust R3 and R4 (fine adj.) until LCD reading reads 0.0±0.1°C.
2. Set the range to the T2/0.1°C, and then Apply 0°C to T2 input (T1 input open)
adjust R1 and R2 (fine adj.) until LCD reading reads 0.0±0.1°C.
3. Set the range to the T1/0.1°F, and then apply 0°F to T1 input (T2 input open)
adjust R6 until LCD reading reads 0.0±0.1°F.
4. Set the range to the T1/0.1°F, and then apply 165°F to T1 input (T2 input
open) adjust R7 until LCD reading reads 165.0±0.1°F.
5. Set the range to the T1/1°F, and then apply 1832°F to T1 input (T2 input
open) adjust R5 until LCD reading reads 1832±1°F.
6. Set the range to the T1/1°C, and then apply 1000°C to T1 input (T2 input
open) adjust R8 until LCD reading reads 1000±0°C.
1
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 isVOID 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 OTHERWARRANTIES 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.
FOR NON-WARRANTY REPAIRS, consult OMEGA for
current repair charges. Have the following information
available BEFORE contacting OMEGA:
2. Model and serial number of the product under warranty, and 1. P.O. number to cover the COST of the repair.
3. Repair instructions and/or specific problems relative to the
product.
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 1999 OMEGA ENGINEERING,
INC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic medium or
machine-readable from, in whole or in part, without prior written consent of OMEGA ENGINEERING, INC.
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