Fluke 8508A User Manual page 163

Range Gain Point
1. On the Calibrator, select the Range Gain point resistance value. Alternatively if using
a standard resistor re-connect the standard resistor to measure its resistance. (For the
2 G range the 8508-7000K 1 G standard resistor is used in place of the calibrator.
For the 200 M and 2 G ranges, de-select EX SNS on the calibrator and de-select
n the 8508A.)
4W
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
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 LoI mode. For
the 2 G range use the 1 G standard resistor in place of the calibrator. Just one range
can be calibrated, if required, but for a full-calibration start with the 2
up to the 2 G range.
Note that EX SNS (4-wire) is not available on the 5720A 100 M range, and the 8508-
7000K 1 G standard resistor is used as a 2-wire device with the calibrator 2-wire
resistance zero used for the corresponding zero points.
when calibrating the 200 M and 2 G range, range zero, and range gain points.
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.
to revert to
CAL
CALIBRATION menu
SET VALUE
to initiate the calibration operation.
.
STANDBY
key to revert to the ranges menu.
key and select the 2 range.
key and select
Filt
Note
menu.
CALIBRATION
.
menu to key in the true output value of
, and .
LoI 4w
is deselected on the 8508A
4W
Calibration and Verification
Routine Calibration
range and work
6
6-19