HD200 Datasheet, PDF (7/10 Pages) Extech Instruments Corporation. – Differential Thermometer Datalogger

Displaying Temperature units
1. Press °C·°F·°K to select the desired temperature units.
2. Touch the thermocouple(s) to the object under test. The temperature reading appears
in the primary display.
Notes:
ƒ The display shows "- - - -" when a thermocouple is not connected.
ƒ The display shows OL (overload) when the temperature being measured is outside the
thermocouple or meter range.
Holding the Displayed Readings
1. Press HOLD to freeze the readings on the display .The display shows “HOLD”.
2. Press DIF/T1·T2·T3 to scroll through T1, T2, T3, T1-T2, T1-T3, or T2-T3 readings for
the primary or secondary display.
3. Press HOLD again to turn off the HOLD function.
Viewing the MIN, MAX, and AVG Readings
1. Press MAX/MIN to step through the maximum (MAX), minimum (MIN), or the average
(AVG) readings. The elapsed time since entering MIN MAX mode, or the time at
which the minimum or maximum occurred appears on the display.
2. Press MAX/MIN button for 3 seconds to exit the MIN MAX mode.
Note: Max/Min/Ave applies to the T1 and T2 inputs only.
Datalogging
1. Set the desired sampling interval as described in the Setup Mode.
2. Press the REC/▼button to start recording. The “TYPE K” and “IR TEMP” indicators
will flash on at the set sample rate when the meter is datalogging.
3. Press the REC/▼button to stop recording.
The supplied software allows the user to transfer stored data to a PC. Refer to the
separate software instructions on the supplied software disk for details.
Using the Offset Function to Adjust for Probe Errors
Use the offset option in Setup Mode to adjust the thermometer’s readings to compensate
for errors in a specific thermocouple or IR temperature. The allowable adjustment range is
± 5.0 ⁰C or ± 9.0 ⁰F.
1. Plug the thermocouple into the input connector.
2. Place the thermocouple in a known, stable temperature environment such as an ice
bath or dry well calibrator.
3. Allow the readings to stabilize.
4. In Setup change the offset until the primary reading matches the calibration
temperature.
Battery Replacement
1. Turn off the thermometer.
2. Slide off the meter’s rear panel.
3. Replace the battery.
4. Secure the rear panel.
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Model HD200 Version 2.0 December 2007