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5.3 GK-403 Readout Box (Obsolete Model)
The GK-403 can store gage readings, as well as apply calibration factors to convert readings to
engineering units. The GK-403 displays the thermistor temperature in degrees C.
5.3.1 Connecting Sensors with 10-pin Bulkhead Connectors Attached
Align the grooves on the sensor connector (male), with the appropriate connector on the
readout (female connector labeled senor or load cell). Push the connector into place, and
then twist the outer ring of the male connector until it locks into place.
5.3.2 Connecting Sensors with Bare Leads
Attach the GK-403-2 flying leads to the bare leads of a Geokon vibrating wire sensor by
connecting each of the clips on the leads to the matching colors of the sensor conductors,
with blue representing the shield (bare).
5.3.3 Operating the GK-403
1) Turn the display selector to the correct position for the model of strain gage purchased
(see Section 5.4).
2) Turn the unit on.
3) A reading will appear in the front display window. (The last digit may change one or
two digits while reading.)
4) The thermistor will be read and displayed on the screen above the gage reading in
degrees centigrade.
5) Press the "Store" button to record the value displayed.
If the no reading displays or the reading is unstable, see Section 7 for troubleshooting
suggestions.
The unit will automatically turn itself off after approximately two minutes to conserve
power. For more information, consult the GK-403 manual.
5.4 Embedment Strain Gage Readout Positions
Model:
Readout Position:
Display Units:
Frequency Range:
Mid-Range Reading:
Minimum Reading:
Maximum Reading:
4200/4200HT
D
microstrain (µε) microstrain (µε) digits (f 2 ×10 -3 ) digits (f 2 ×10 -3 )
450-1200 Hz
1400-3500 Hz
2500 µε
2500 µε
1000 µε
1000 µε
4000 µε
4000 µε
Table 2 - Readout Positions
4202
4204
E
A (Mode: Digits)
800-1600 Hz
1700 Digits
650 Digits
2750 Digits
13
4210/4212/4214
B
1400-3500 Hz
6000 digits
2000 digits
10000 digits
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