Omega Engineering HH501BJ User manual
OMEGA
HH501BJ
Digital Thermometer
OMEGAnetSM On-Line Service
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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, patient connected application.
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The symbol on the instrument indicates that the operator must refer to an
explanation in this manual.
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.
INTRODUCTION
This instrument is a 3½ digit, compact-sized portable digital thermometer
designed to use external J-type thermocouples as temperature sensor.
Temperature indication follows Reference Temperature/Voltage Tables
(N.I.S.T. Monograph 175 Revised to ITS-90) for J-type thermocouples.
SAFETY INFORMATION
Itisrecommendedthatyoureadthesafetyandoperationinstructionsbefore
using the thermometer.
SPECIFICATIONS
ELECTRICAL
Temperature Scale: Celsius or Fahrenheit user-selectable.
Measurement Range:
-210°C to 1200°C, -346°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:Accuracyisspecifiedforoperatingtemperaturesovertherangeof
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 1200°C
±2.0°C on -60°C to -210°C
±(0.1% rdg + 2.0°F) on -60°F to 1999°F
±4.0°F on -60°F to -346°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.
Maximum Differential Common Mode Voltage (Maximum Voltage be-
tween T1 and T2 during measurement): 1volt.
Reading Rate: one time per second.
InputConnector:Acceptsstandardminiaturethermocoupleconnectors(flat
blades spaced 7.9mm, center to center).
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3
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: 3½digitliquidcrystaldisplay (LCD)withmaximum readingof1999.
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.
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.
°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.
"" Button
Press" "button totoggle onandoffofbacklight. Thebacklightwillswitch-
off automatically after 30 seconds.
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.
PressingtheHOLDkeyagaintocancelHOLDmodecausing 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).
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1
4
5
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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, °C °F key, REL key, SET key, Hi/Lo Limits
key, T1 T2 T1-T2 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.
T1 T2/T1-T2
The input selection indicates which input is selected for display; T1
thermocouple,T2thermocoupleorthedifferencebetweenthetwothermo-
couples (T1-T2), when the thermometer is turned on, When the thermom-
eter is turned on, it is set to the input selected that was in use when the
thermometer was last turned off.
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6
7 8 9
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.)
WhenthedesiredRelativevaluehasbeenentered,pressRELkeytoenter
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
LCDisalwaysthedifferencebetweenthestoredreferenceandthepresent
reading.
SET mode (Relative value set and Hi/Lo Limits value set)
1. Press SET key to enter Relative valuse SET mode (Press ENTER key
canescaperelativevalusesetmode),RELsetmode._===.=isdisplayed
(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
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10
11
7
12
(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.IntheHi/LoLimitsmode,thevaluecannot>±2000.0counts.allvaluewill
be memorized until yor reset it.
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
disabledandother funtion keyaredisabled, when inputtemperaturevalue
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.
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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.
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