Adc Adjustment; Dc Voltage Adjustment - Fluke 8508A User Manual

8508A
Users Manual

ADC Adjustment

ADC (analog to digital converter) adjustment aligns the different resolutions available
from the 8508A analog to digital converter, so that there are no significant differences in
readings when changing resolutions with a constant input value. It is recommended that
ADC CAL
differences. If required, it is recommended that ADC adjustment is performed before any
other calibrations.
No external equipment or signals are required to perform ADC adjustment.
Procedure
1. Ensure that no signals are present on the 8508A inputs. The 8508A may be left
2. On the 8508A, Press
3. Select

DC Voltage Adjustment

The Calibrator can deliver a lethal electric shock.
To avoid electric shock when performing the following adjustment
procedures:
•
•
Initial Setup
1. On the 8508A, press the
2. Press the
3. Press the
4.
5. In adjustment mode the resolution defaults to
6. Confirm that the 8508A is configured for internal guard (External Guard is
7. Ensure that the calibrator output is set to
8. Connect the Calibrator to the 8508A as shown in Figure 6-1.
After making the connections allow at least 30 minutes for thermal emfs in
the leads to stabilize.
6-14
is only performed if performance verification indicates significant resolution
connected to the calibrator as shown above provided the calibrator output is set to
STANDBY.
CAL
to initiate the adjustment operation, which will take approximately 3
Adc
minutes to complete.
Adjustment is complete when the
Never touch any lead or terminal unless you are absolutely certain
that no dangerous voltage is present.
Make sure that signal leads are in a safe condition before you
handle them in any way.
key.
DCV
CONFIG key and deselect FILT.
key and select 1 kV range.
Press the DCV
recommended that this resolution is used for adjustment of all DCV ranges.
deselected) by checking that the
display.
Guard ( is deselected).
EX GRD
to enter the
CALIBRATION
legend goes out.
Busy
 Warning
CAL key.
RESL7
legend does not appear on the left-hand
ExGd
STANDBY
Note
menu, and select
SPCL
in the DCV function. It is
and configured for Internal
.