Fluke 8508A User Manual page 165

Zero Point
1. On the 8508A, select the required range.
2. On the Calibrator, select zero
resistor connect the standard resistor for a 4-wire resistance zero.
3. On the 8508A, press
4. Press
SAMPLE
Calibration is complete when the Busy legend goes out and the calibrated
measurement is displayed.
Range Gain Point
1. On the Calibrator, select Range Gain point Output value. Alternatively if using a
standard resistor re-connect the standard resistor to measure its resistance.
2. On the 8508A, Press
3. Select on the
Set
4. Use the numeric keys with the
the calibrator (or the value of the resistance standard) at the range gain value, then
press Enter.
5. Press
SAMPLE
Calibration is complete when the Busy legend goes out and the calibrated
measurement is displayed.
6. On the Calibrator, set
7. Press the
Tru LoI Mode Calibration
1. Press the
2. Press the
CONFIG
Range Zero and Gain Calibration Procedure
After the initial setup and connecting up, use the following procedure to calibrate range
zero and range gain for the ranges and points detailed in Table 6-5 for the Tru LoI
mode. Just one range can be calibrated if required, but for a full calibration start with the
2 range and work up to the 20 k range.
On each range, the 8508A automatically recognizes the appropriate value as range zero or
range gain from the applied resistance value.
It is unlikely that the resistance standard will be at exactly the nominal value
required. The Set feature allows a user to enter the true output value of the
calibration standard where it differs from nominal range gain point. If the
resistance value is exactly the nominal value required, omit steps 2-4 for the
Range Gain Point.
and Operate. Alternatively if using a standard
to enter the
CAL
to initiate the calibration operation.
to revert to
CAL
CALIBRATION menu
SET VALUE
to initiate the calibration operation.
.
STANDBY
key to revert to the ranges menu.
key and select
Plus Tru .
key and select
Filt
Note
menu.
CALIBRATION
menu.
CALIBRATION
.
menu to key in the true output value of
From the menu select the
Tru
, and .
LoI 4w
Calibration and Verification
Routine Calibration
range.
2
6
6-21