Fluke 8508A Service Manual page 60

8508A
Service Manual
Calibration is complete when the Busy legend goes out and the calibrated measurement is
displayed
Range Gain Point
1. On the Calibrator, select the Range Gain point resistance value. Alternatively if using
2. On the Multimeter, Press
3. Select
4. Use the numeric keys with the
5. Press
6. On the Calibrator, set
7. Press the
LoI Mode Calibration
1. Press the
2. Press the
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 3-5 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.
Multimeter when calibrating the 200 M and 2 G range, range zero, and range gain
points.
On each range, the Multimeter 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.
3-20
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 Multimeter.)
4W
on the
Set CALIBRATION menu
the calibrator (or the value of the resistance standard) at the range gain value, then
press Enter.
to initiate the calibration operation.
SAMPLE
Calibration is complete when the Busy legend goes out and the calibrated
measurement is displayed.
STANDBY
key to revert to the ranges menu.
key and select the 2
key and select
CONFIG
to revert to
CAL CALIBRATION
.
menu to key in the true output value of
SET VALUE
.
range.
, and
Filt LoI 4w
Note
menu.
.
range and work
is deselected on the
4W