Omega HH504 Manuale utente
OMEGA
HH504
Digital Thermometer
OMEGAnetSM On-Line Service
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TM
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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.
1
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.
The symbol on the instrument indicates that the operator must refer to
an explanation in this manual.
INTRODUCTION
This instrument is a 4½ digit, compact-sized portable digital thermometer
designed to use external 100WPlatinum RTD as temperature sensor. Tem-
peratureindicationfollowsReferenceTemperature/ResistanceTables(Pt385
for European Curve, Alpha=.00385 and Pt3926 for American Curve, Al-
pha=.003926).
SAFETY INFORMATION
Itisrecommendedthatyoureadthesafetyandoperationinstructionsbefore
using the thermometer.
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SPECIFICATIONS
ELECTRICAL
Temperature Scale: Celsius or Fahrenheit user-selectable.
Measurement Range:
Pt385(100W) -200°C to 800°C, (-328°F to 1472°F)
Pt3926(100W) -200°C to 630°C, (-328°F to 1166°F)
Resolution: 0.1°C or 0.2°F
Accuracy:Accuracyisspecifiedforoperatingtemperaturesovertherangeof
18°C to 28°C (64°F to 82°F), for 1 year, not including RTD probe error.
±(0.05% rdg + 0.2°C) on °C scale
±(0.05% rdg + 0.4°F) on °F scale
Temperature Coefficient: 0.1 times the applicable accuracy specification
per°Cfrom0°Cto18°Cand28°Cto50°C(32°Fto64°Fand82°Fto122°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.
Input Connector: MTP miniature RTD 3 prong connector.
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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:4½digitliquidcrystaldisplay(LCD)withmaximumreadingof19999.
Overload: "----.-" 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.
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1OPERATING INSTRUCTIONS
Power Switch
The key turns the thermometer on or off. In the data SET mode, can not
power off, must leave data SET mode then power off.
°C/°F Selecting the Temperature Scale (Main display)
Reading the main 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/°F key.
HOLD Mode (only Main display)
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.
PressingtheHOLDkeyagaintocancelHOLDmodecausingthermometer
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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T1/ T2/T1-T2 Main display Input Selection
The input selection indicates which input is selected for main display; T1
probe,T2probeorthedifferencebetweenthetwoprobes(T1-T2),whenthe
thermometer is turned on, it is set to T1.
When main display input selected T1, then T1 input can select alternate of
probe by pressing Pt385/Pt3926 key switch.
Pt385/Pt3926 T1 Input RTD Probe Select (Main display)
ThePt385/Pt3926keyswitchtheT1inputselectsthePt385orPt3926RTD
probe as input, when main display input selected T1.
When the thermometer is turned on, it is set to the probe selected that was
in use when the thermometer was last turned off.
MIN MAX with Time record Mode (only Main display)
Press MIN MAX key to enter the MIN MAX Recording mode, (displays the
Maximum reading with time, Minimum reading with time and Average
reading stored in record mode). In the this mode the automatic power-off
featureis disabledand key,°C/°Fkey, REL key, SETkey,Hi/Lo Limits
key and main display T1 T2 T1-T2 key, Pt385/Pt3926 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 and AVG readings.
If an overload is recorded, the averaging function is stopped and average
value display"----.-".
6
7
The true average of all the reading taken over at least 22 hours preiod can
be displayed. If 22 hours is exceeded, new averages are no longer
calculated.Thelastcalcalatedvalueisretainedastheaveragereading,but
the actual minimum and maximum reading will continue to be captured.
In the this mode, press HOLD key to stop the recording of readings, all
values are frozen, press again to restart recording.
TopreventaccidentallossofMIN,MAXandAVGdata,inthismodecanonly
becancelledbypressingand holddowntheMINMAXkeyfor2secondsto
exit and erased recorded readings.
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 >±3000.0 counts) shown on the
LCDisalwaysthedifferencebetweenthestoredreferenceandthepresent
reading.
8
9
°C/°F Selecting the Temperature Scale (Second display)
Readings the second 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/°F key.
SET mode (Relative value set, Time 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 in
main display.
Relativevalueis enteredviaoverlay numbers, thenpressoverlay ENTER
key, stored the relative value, enter Time set mode.
2. Time set mode, (Press ENTER key can escape Time set mode)
=.= ==:==isdisplayedinsecondandthirddisplay.Time(hours,minutes,
seconds)valueisenteredviaoverlaynumbers,thenpressoverlayENTER
key. Time start from set time value, enter Hi/Lo Limits value set mode.
3. Hi Limit value set mode, is displayed (Press ENTER key can escape Hi
Limit value set mode), = = = =.= is displayed in main display, Hi Limit value
is entered via overlay numbers, then press overlay ENTER key, stored the
HiLimitvalue,enterLoLimitvaluesetmode(Press ENTERkeycanescape
Lo Limit value set mode). = = = =.= is displayed in main display, Lo Limit
value is entered via overlay numbers, then press overlay ENTER key,
stored the Lo Limit value and exit SET mode.
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4.Whenthethermometeristurnedon.TheRelativesetvalueandHi/LoLimits
set value that was in use when thermometer was last turned off set values.
T1/T2 /T1-T2 second display Input Selection
Theinput selectionindicateswhichinputisselectedforseconddisplay;T1
probe,T2probeorthedifferencebetweenthetwoprobes(T1-T2),whenthe
thermometer is turn on, it is set to T2 input can select alternate of probe by
second display Pt385/Pt3926 key switch.
Pt385/Pt3926 Input RTD Prob select (second display)
ThePt385/Pt3926keyswitchtheT2inputselectsthePt385orPt3926RTD
probe as input, when second display input selected T2.
When the thermometer is turned on, it is set to the RTD selected that was
in use when the thermometer was last turned off.
Hi/Lo Limits mode (only Main display)
Press Hi/Lo LIMITS key to enter the Hi/Lo Limits comparative mode, when
input temperature value exceed Hi or Lo Limits value. The beeper emits a
continuitypulsetone.PressHi/LoLIMITSkeyagaintoexittheHi/LoLIMITS
mode.
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