Fluke 8508A User Manual page 158

8508A
Users Manual
Range Zero and Gain Calibration Procedure
After the initial setup and connecting up, use the following procedure to calibrate range
zero, then positive and negative range gains on all DCV ranges. Just one range can be
calibrated if required, but for a full calibration start with the 200 mV range and work up
to the 1kV range, as shown in Table 6-3.
The procedure assumes the user has knowledge of the actual output value of the
calibrator at the range gain values, from a measurement or from a certificate of
calibration. The
standard where it differs from the nominal range gain point. If the calibrator output is
considered to be exactly nominal, use of the Set feature is not required, also omit steps 2-
4 for the Range Gain Points.
On each range, the 8508A automatically recognizes the appropriate value as range zero or
range gain from the applied signal amplitude and polarity.
Zero Point
1. On the 8508A, select the required range.
2. On the Calibrator, set zero output and Operate.
3. On the 8508A, press
4. Press
6-14
Table 6-3. DC Voltage Calibration Points and Sequence
8508A Range
200 mV
2 V
20 V
200 V
1000 V
feature allows a user to enter the true output value of the calibration
Set
CAL
to initiate the calibration operation.
SAMPLE
Calibration is complete when the Busy legend goes out and the calibrated
measurement is displayed.
Point
Zero
Range Gain +ve
Range Gain -ve
Zero
Range Gain +ve
Range Gain -ve
Zero
Range Gain +ve
Range Gain -ve
Zero
Range Gain +ve
Range Gain -ve
Zero
Range Gain +ve
Range Gain -ve
to enter the
CALIBRATION
Voltage
0 mV
+100 mV
-100 mV
0 V
+1 V
-1 V
0 V
+10 V
-10 V
0 V
+100 V
-100 V
0 V
+1000 V
-1000 V
menu.