Fluke ScopeMeter 190 Series III, Service Manual

Page: 45 / 70

ScopeMeter® Test Tool
Calibration Adjustment
41
Input A LF-HF Gain
To do the Input A LF-HF Gain calibration:
1. Connect Ch. A of the Test Tool to the 5502A. See
Figure 13 .
2. Press
2
to select the first calibration step in Table 14 , Input A LF-HF Gain .
The display must show step CL 0654 (Pos A Fast).
3. Set the 5502A SCOPE output to source the signal required for the first calibration point.
4. Set the 5502A in operate (OPR) or standby (STBY) as indicated.
5. Press
3
to start the calibration.
Wait until the display shows calibration status CL 509: READY .
6. Press
2
to select the next calibration step, set the 5502A to the next calibration
point signal, and start the calibration.
Continue through all calibration points for
Input A LF-HF Gain .
7. Wait until the display shows calibration status CL 0461: READY .
When you are finished, set the 5502A to Standby. Continue at the Input B LF-HF Gain section.
Input B LF-HF Gain
To do the Input B LF-HF Gain calibration:
1. Press
2
to select the first calibration step in Table 14 , Input B LF-HF Gain .
2. Connect Ch. B of the Test Tool to the 5502A. See Figure 14 .
Figure 14. 5502A Scope Output to Test Tool Input B
3. Set the 5502A SCOPE output to source the signal required for the first calibration point for
Input B LF-HF Gain (CL 0674, Pos B Fast).
NORMAL SCOPE
FLUKE 5502A CALIBRATOR
PM9091
A D C
B
USE 50
:
TERMINATION
A B
METER
PM9091
2 CHAN. + METER 4 CHANNELS
50
:
(PM9585 or TRM50)
For 190-502 and -504
use only TRM50!
50
:
(PM9585 or TRM50)