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3.4. MICRO-6000 Datalogger
The following parameters are recommended when using the strain gages with the MICRO-
1000 datalogger or any other CR1000 based datalogger:
See Table 2 for the recommended Gage Type selection and Gage Factor,G, entry to
convert to microstrain when using the embedment strain gages with the MICRO-1000
Datalogger Configuration Software. Table 2 also lists the starting and ending frequency
settings for the excitation sweep when writing a program for the CR1000 using the P28
vibrating wire measurement instruction. Alternately, if a calibration sheet is supplied with the
strain gage the exact values can be calculated from the start and end frequencies of the
calibration. To maximize the stability and resolution of the sensor a relatively narrow band
of excitation frequency should be selected. One could calculate these settings by taking an
initial reading and then setting the starting frequency to 200 Hz below and the ending
frequency 200 Hz above.
Model: 4200ER
MICRO-6000 Gage
Type:
4200
Gage Factor G:
Shown on cal sheet
Start Frequency
(P28):
4 (400 Hz)
End Frequency
(P28):
12 (1200 Hz)
Table 2 - Embedment Strain Gage Datalogger Parameters
3.5. Measuring Temperatures
All Vibrating Wire Strain Gages are equipped with a thermistor for reading temperature. The
thermistor gives a varying resistance output as the temperature changes. Usually the white
and green leads are connected to the internal thermistor.
Note: All readout boxes will read the thermistor and display temperature in
C.
