SERIES 8159 SIGNAL CONDITIONER MANUAL
14
4.
Set the CAL NUMBER to the full-scale value provided with the RCAL resistor. This is
the shunt calibration valve indicated on the sensor’s calibration certificate.
Example: If the RCAL resistor supplied with the instrument creates an output equivalent
to 80% of a full-scale 500-pound load, set the CAL NUMBER to 400.00, 0400.0 or
00400.
See Section 6.0, Program Instructions, for details on how to set this value.
5.
The TARE and CAL LED's on the front panel should be illuminated.
6.
Depress the INCREMENT (S2) switch and hold until the TARE LED extinguishes. The
instrument should now display the UNTARED reading.
7.
Depress the DECREMENT (S3) switch and hold until the CAL LED extinguishes. The
instrument should now display the UNCALIBRATED reading.
8.
With no load on the transducer, verify the readout is approximately zero.
9.
Depress the INCREMENT (S2) switch and hold until the TARE LED illuminates. The
readout should be ZERO +/- 1 digit.
10.
Depress and hold the RCAL switch. The display should read a value greater than 01000.
For optimum performance the readout should be closer to 19000. Ignore decimal point.
If system calibration was done by PCB, this displayed valve will be equal to the shunt
calibration valve shown on the system calibration certificate.
11.
While holding down the RCAL switch, depress the DECREMENT (S3) switch and hold
until the CAL LED illuminates. The readout should display the CAL NUMBER +/- 1
digit.
The RCAL CALIBRATION sequence is now complete.
NOTE: Calibration information (tare and slope values) is maintained in non-volatile
memory and is updated every time CALIBRATION Steps 9 and 10 are performed. TARING
the display does not change the scale factor (slope value) calculated when Step 10 is
completed.
