189II/AN
Service Manual
26
If the measurement is not within calibration tolerance then after pressing
NEXT, an error message will be shown and the calibration step will not
proceed. The operator can adjust input signal if needed and attempt NEXT
again.
If the meter continues to give an error message after the source is
validated, the calibration procedure will not proceed and the meter will
need service. Select the Abort softkey to exit the calibration procedure. Any
calculated calibration constants will be discarded.
5.
If there are more functions to be calibrated, set the rotary switch to the appropriate
function, and continue from step one.
6.
Repeat steps 1 through 5 until the secondary display shows the
Cal
Complete
message. This indicates that the calibration procedure is complete and the new
calibration constants will be saved. The new constants will be used after selecting F1
softkey [OK] and the Meter restarts.
A counter records the number of completed calibrations that have been performed. The
counter is updated at the end of the calibration procedure. To review the calibration
adjustment counter go to the Setup Meter Info screen.
Power Cycle
If the Meter power is turned off during calibration the procedure will be aborted, and any
calibration constants calculated during the procedure will be discarded. Previously stored
calibration constants will be used after power-on.
Calibration Adjustment Steps
Table 7 shows the calibration adjustment steps and the corresponding Meter
settling/calibrating time for a Meter with version 1.00 firmware. Refer to Table 8 for
firmware version 1.10.
Note
Before starting the adjustment procedure, set the present time and date, so,
the stored calibration date is accurate. The calibration date can be found in
the Setup menu under Meter Info.
The Meter must be allowed to reach the ambient temperature of the lab
environment before you begin the adjustment procedure. Depending on
temperature gradient, this could take up to several hours.
Table 7. Calibration Adjustment Steps for Firmware Version 1.00
Step
Rotary Switch
Position
Source Value
Settling Time
(seconds)
Calibrating Time
[1]
(seconds)
1
mV DC
0.0 V, 0 Hz
2
10
2
mV DC
500.0 mV, 0 Hz
2
15
3
mV DC
50.0 mV, 0 Hz
2
2
4
mV DC
0.0 V, 0 Hz
7
15
5
mV AC
5.0 mV, 60 Hz
4
4
6 mV
AC
50.0 mV, 60 Hz
4
2
7
mV AC
500.0 mV, 60 Hz
4
5
8
mV AC
50.0 mV, 60 Hz
10
5
Содержание 189II/AN
Страница 6: ...189II AN Service Manual iv...
Страница 8: ...189II AN Service Manual vi...
Страница 44: ...189II AN Service Manual 34...
