HD200 Datasheet, PDF (4/10 Pages) Extech Instruments Corporation. – Differential Thermometer Datalogger

Operation
The Basics
1. Press to turn the thermometer on. Press and hold the button for 3 seconds to
turn the meter off.
2. Press MAX/MIN to record and step through the maximum, minimum, and average
readings for the T1 and T2 inputs (does not apply for the T3 IR input). When active,
the display shows the maximum, minimum, or average of the logged readings and the
elapsed time. To exit the MIN/MAX/AVG mode press and hold the MAX/MIN button
for 3 seconds.
3. Press °C·°F·°K to switch between Celsius (°C), Fahrenheit (°F), and Kelvin (°K).
4. Press HOLD to freeze or unfreeze the displayed readings.
5. Press DIF/T1·T2·T3 to scroll through display combinations: T1, T2, T3 and T1-T2, T1-
T2, T2-T3 (differential temperature measurement) in the primary, secondary and third
display.
6. Press the Setup/ button to turn on the backlight. Press it again to turn off the
backlight.
7. Press and hold the Setup/ button for 5 seconds to enter or exit the Setup mode.
Press ▲ to scroll to a Setup option. (see "Changing Setup Options.")
8. Press REC/▼to start or stop recording. If in the Setup mode, use this button to scroll
to the Setup option you want to change. Press REC/▼to decrease the displayed
setting.
9. Press ENTER to enter a Setup option. Press ENTER again to store the displayed
setting in memory.
Using the thermocouple (s)
1. Plug the thermocouple(s) into the T1or T2 input connector(s).
2. Press to turn on the thermometer. After 1 second the thermometer displays the
reading. If no thermocouple is plugged into the selected input or the thermocouple is
"open," the display shows "- - - -".
Using the supplied IR (Infrared) Thermometer Probe
Plug the output of the remote IR probe into the T3 (IR input) meter jack (see diagram), “T3 - -
- -” will appear on screen. If the IR probe is not connected, “T3 - - - -” will not appear.
Press the external probe’s “SCAN” button to take and display a
reading. Use the laser pointer to improve target aim.
While the SCAN button is held down, the readings change as the
user scans various surfaces. When the button is released the
display is held for approx. 7 seconds and the meter then returns to
normal operation.
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Model HD200 Version 2.0 December 2007