Performance Verification - Fluke 8508A Service Manual

To Calibrate at Spot Frequencies
Spot Calibration is available only when in AC Voltage function with Spot already
selected on the
ACV CONFIG
input frequency to a non-nominal RMS value. In subsequent use, frequency response
flatness errors are reduced within ±10 % of the calibrated spot frequency.
Assuming that the Multimeter is in calibration mode and the setup is connected as
described above under Initial Setup and Connections for routine calibration. The
configuration defaults to
Proceed as follows:
1. Select
ACV
2. Press the
CONFIG
3. Press the
CAL
The
CALIBRATION
4. Select .
Set
The
SPOT CAL
5. Select the soft key for the required spot, 1 to 6 (
The SPOT (x = 1 to 6) RMS menu is displayed.
6. Key in the true RMS output value of the standard, then select
The
SPOT FREQUENCY
spot will be calibrated.
7. Press
SAMPLE
Calibration is complete when the
measurement is displayed. The menu display reverts to the
8. On the Calibrator, set
9. On the Multimeter, select other spots as required, repeating the process for each
selection.
10. Exit from the

Performance Verification

The 8508A Digital Reference Multimeter offers state of the art performance. This
procedure is intended as a guide for qualified metrology personnel who have access to a
standards laboratory with equipment available to verify the performance of an instrument
of this level of accuracy. The procedure assumes users are familiar with relevant best
measurement practice, and will take precautions to avoid introducing errors from sources
such as thermal emfs, leakages, electromagnetic interference, etc. It also assumes users
will make adequate allowance for equipment stabilization and measurement settling
times.
This routine performance verification procedure describes the test points and sequence of
operations required to check the Multimeter and assumes calibration references of
adequate traceable uncertainty are available – in this case a Fluke 5720A calibrator and
5725A amplifier used with an 8508A-7000 Calibration Kit. The procedure assumes the
user is able to calibrate and characterize the calibration standards, without describing the
process required to do so. Refer to the Routine Calibration section for more information
on the characterization process.
menu. Each spot (six per range) can be calibrated at a valid
and
Tfer RESL6
and select the required Range.
key and select
Spot
key.
menu is displayed.
menu is displayed.
menu is displayed, showing the frequency at which the
to initiate the calibration operation.
Busy
.
STANDBY
menu by pressing any hard key.
SPOT CAL
(both required).
.
to ).
Sp1 Sp6
legend goes out and the calibrated
SPOT CAL
Calibration and Verification

Performance Verification

.
Enter
menu.
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