Fluke 8508A User Manual page 164

8508A
Users Manual
Zero Point
1. On the 8508A, select the required range.
2. On the Calibrator, select zero
3. On the 8508A, press
4. Press
Range Gain Point
1. On the Calibrator, select the Range Gain point resistance value. Alternatively if using
2. On the 8508A, Press
3. Select
4. Use the numeric keys with the
5. Press
6. On the Calibrator, set
7. Press the
Tru 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 6-5 for the Tru
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.
6-20
resistor connect the standard resistor for a 4-wire resistance zero. (For the 200 M
and 2 G ranges, de-select Ex SNS on the calibrator and de-select
8508A.)
CAL
to initiate the calibration operation.
SAMPLE
Calibration is complete when the Busy legend goes out and the calibrated
measurement is displayed.
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
CAL
on the
Set CALIBRATION menu
the calibrator (or the value of the resistance standard) at the range gain value, then
press Enter.
.
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
Plus
key and select
CONFIG
and Operate. Alternatively if using a standard
to enter the
CALIBRATION
to revert to
CALIBRATION
.
menu to key in the true output value of
SET VALUE
.
From the
Tru . Tru
and . Ensure
Filt 4w
Note
n the
4W
menu.
menu.
menu select the range.
2
is deselected.
LoI
mode.