Omega Thermometer HH501AK User Manual

OMEGA  
HH501AK  
Digital Thermometer  
 
INTRODUCTION  
This instrument is a 3½ digit, compact-sized portable digital thermometer  
designed to use external K-type thermocouples as temperature sensor.  
Temperature indication follows Reference Temperature/Voltage Tables  
(N.I.S.T. Monograph 175 Revised to ITS-90) for K-type thermocouples. One  
K-type thermocouple is supplied with the thermometer.  
SAFETY INFORMATION  
Itisrecommendedthatyoureadthesafetyandoperationinstructionsbefore  
using the thermometer.  
WARNING  
To avoid electrical shock, do not use this instrument when working  
voltages at the measurement surface over 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:  
-200°C to 1372°C, -328°F to 1999°F  
Resolution: 0.1°C , 0.1°F  
(-59.9°C to 199.9°C ,-59.9°F to 199.9°F)  
1°C , 1°F on other range  
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.  
±(0.1% rdg + 1.0°C) on -60°C to 1372°C  
±2.0°C on -60°C to -200°C  
±(0.1% rdg + 2.0°F) on -60°F to 1999°F  
±4.0°F on -60°F to -328°F  
TemperatureCoefficient:0.1timestheapplicableaccuracyspecificationper  
°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: one time 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.  
Overload: "-OL" is display.  
Battery: Standard 9V battery.  
Battery Life: 100 hours typical.  
Auto power off: The meter key switch inactive for more than 30 minutes,  
press power key to resume operation.  
Dimensions: 192mm(H) x 91mm(W) x 52.5mm(D).  
Weight: 365g.  
3
 
OPERATING INSTRUCTIONS  
Power Switch  
The key turns the thermometer on or off. In the MIN MAX record mode  
can not power off, must leave MIN MAX record mode then power off.  
1
2 5  
°C °F Selecting the Temperature Scale  
Readings is 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. To change the temperature scale, press the °C or °F key.  
3 " " Button  
Press " " button to toggle on and off of backlight. The backlight will switch-  
off automatically after 30 seconds.  
4
HOLD Mode  
Pressing the HOLD key to enter the Data Hold mode, the "HOLD" annun-  
ciator is displayed. When HOLD mode is selected, the thermometer held  
the present readings and stops all further measurements.  
Pressing the HOLD key again to cancel HOLD mode causing thermometer  
to resume taking measurements.  
In the MIN/MAX recording mode, press HOLD key to stop the recording.  
Press HOLD key again to resume recording. (Previously recorded reading  
are not erased).  
4
 
6
MIN MAX record Mode  
Press MIN MAX key to enter the MIN MAX Recording mode, (displays the  
Maximum reading, Minimum reading, "MAX-MIN" reading and Average  
reading stored in record mode). In the this mode the automatic power-off  
feature is disabled and key and all function key are disabled.The beeper  
emits a tone when a new minimum or maximum value is recorded.  
Push MIN MAX key to cycle through the MAX, MIN, MAX-MIN and AVG  
readings.  
If an overload is recorded, the averaging function is stopped and average  
value display"-OL".  
In the this mode, press HOLD key to stop the recording of readings, all  
values are frozen, press again to restart recording.  
To prevent accidental loss of MIN, MAX, "MAX-MIN" and AVG data, in this  
mode can only be cancelled by pressing and hold down the MIN MAX key  
for 2 seconds to exit and erased recorded readings.  
7 8 9  
TIMER STOP-WATCH Mode  
Press TIMER STOP-W key to enter stop-watch mode stop-watch is  
displayed. Press START/STOP key to toggle stop-watch starts and stops  
(Time goes up to 19 minutes & 59.9 seconds). Press CLEAR key to display  
0.1 second , then press again to zero the stop-watch.  
Press TIMER STOP-W key again to exit the stop-watch mode.  
5
 
10 REL Relative mode (only Main display)  
Pressing REL key to enter the Relative mode, zero the display, and store  
the displayed Reading as a reference value and annunciator REL is  
displayed. Press REL key again to exit the relative mode.  
The relative value can also be entered by the user. (See "SET mode" later  
in this manual.)  
When the desired Relative value has been entered, press REL key to enter  
the Relative mode, press SET key use set Relative value as a reference  
value. Press REL key again to exit the relative mode.  
In the Relative mode, the value (can not >±2000.0 counts) shown on the  
LCD is always the difference between the stored reference and the present  
reading.  
11  
SET mode (Relative value set and Hi/Lo Limits value set)  
1. Press SET key to enter Relative valuse SET mode (Press ENTER key  
can escape relative valuse set mode), REL set mode. _ = = =.= is displayed  
(the ".=" is displayed when you set up the fourth number).Relative value is  
entered via overlay numbers, when you want to get negative values push  
(- 0) key for end of numbers, then press overlay ENTER key, stored the  
relative value, enter Hi/Lo Limits value set mode.  
2. Hi Limit value set mode, (Press ENTER key can escape Hi Limit value  
set mode), _ = = =.= is displayed (the ".=" is displayed when you set up the  
fourth number), Hi Limit value is entered via overlay numbers, when you  
want to get negative values push (- 0) key for end of numbers, then press  
overlayENTERkey,storedthe HiLimitvalue,enterLoLimitvaluesetmode  
6
 
(Press ENTER key can escape Lo Limit value set mode), _ = = =.= is  
displayed(the".="isdisplayedwhenyousetupthefourthnumber), LoLimit  
valueisenteredviaoverlaynumbers, whenyouwanttogetnegativevalues  
push (- 0) key for end of numbers, then press overlay ENTER key, stored  
the Lo Limit value and exit set mode.  
3. In the SET mode, the value can not >±2000.0 counts.all value will be  
memorized until yor reset it.  
12  
Hi/Lo LIMITS mode  
Press Hi/Lo LIMITS key to enter the Hi/Lo Limits comparative mode,  
"LIMIT" is displayed. In the this mode the automatic power-off feature is  
disabled and other funtion key are disabled, when input temperature value  
exceed Hi. The beeper emits a continuity pulse tone and "Hi" is displayed,  
and when input temperature value exceed Lo value.The beeper emits a  
discontinuous pulse tone and "Lo" is displayed. Press Hi/Lo LIMITS key  
again to exit the Hi/Lo LIMITS mode.  
7
 
OPERATOR MAINTENANCE  
WARNING  
To avoid possible electrical shock, disconnect the thermocouple  
connectors from the thermometer before removing the cover.  
Battery Replacement  
Powerissuppliedbya9volt"transistor"battery. The" "appearsontheLCD  
display when replacement is needed. To replace the battery, remove the two  
screws from the back of the meter and lift off the battery cover. Remove the  
battery from battery contacts.  
8
 
HH501(A,B)K / HH501(A,B)J / HH501(A,B)T / HH501(A,B)E  
HH508BR/HH508/HH509/HH509R  
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.  
1. Set the jumper position on J1 position.  
2. Input DCV 25.6mV to the T1 after the display is stabilized (forward 4 digits), then  
press “ ENTER “ key and "01" is displayed.  
3. Input DCV 74mV after the display is stabilized, then press “ENTER “ key and "OL"  
is displayed.  
4. Input 0LC (K-type) after the display is stabilized, then press “ENTER “ key.  
5. Don't push any key and the meter will turn off automatically after 10 seconds.  
6. After adjustment set the jumper back to J3 position.  
7. Turn on the meter then input 0LC (K-type). The display reading reads 0°C if  
the calibration procedure is right.  
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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