407907 Datasheet, PDF (3/4 Pages) Extech Instruments Corporation. – RTD Thermometer

Meter Description
1. RTD probe connector
2. RS232 connector
3. LCD display
4. Keypad
5. RTD probe (Sold separately)
6. Battery compartment (rear)
7. Protective holster
Operation
Connecting the optional RTD probe
Plug the optional 4-wire RTD probe(sold separately) into the jack at the top of the meter.
The jack is keyed and can only be inserted one way. Use care when inserting the probe.
Powering the meter
To power the meter, slide the OFF/ON switch to the ON position. If the display remains
blank, check the 9V battery (rear compartment). Slide the switch to the OFF position to
turn the meter off. Remove the battery if the meter is to be stored for long periods.
Selecting units of measure
Press the ^oF/^oC button to select the desired temperature units. The LCD display will show
the ^oC or the ^oF symbol to indicate the currently selected unit of measure.
Selecting the resolution
The meter offers 0.1^o and 0.01^o display resolution. To select the resolution use the
0.01^o/0.1^o switch. The display will reflect the currently selected resolution. Use the
specifications shown earlier in this manual to determine the best resolution for the
measurement range of a given application.
Taking measurements
Once the meter has been setup and a probe has been inserted in the jack at the top of the
meter, place the temperature probe in the area under test. Give the meter several seconds
to stabilize. Read the temperature measurement on the LCD. If dashes appear on the
display, either the reading is out of range or the RTD probe is not connected (or defective).
Maximum and Minimum (MAX/MIN) Record and Recall
When selected, the recording function stores the MAX/MIN readings for later recall.
1. Press the RECORD button once. The RECORD indicator will appear on the display.
2. After readings are taken, press the RECALL button to view the maximum reading. The
MAX indicator will appear on the display to inform the user that the reading now on the
display is the highest reading since the RECORD button was first pressed.
3. Press the RECALL button again to view the minimum reading. The MIN indicator will
appear on the display to inform the user that the reading now on the display is the
lowest since the RECORD button was first pressed.
4. To return to normal operation, press the RECORD button again. The RECORD, MAX,
and MIN indicators will extinguish.
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Model 407907 V 1.3 01/06