Input A, B, C, D Ac Voltage Accuracy Test (Lf) - Fluke ScopeMeter 190 III Series Service Manual

190 Series III
Service Manual
Table 3. Volts DC Measurement Verification Points (cont.)
Range
20 V/div
50 V/div
100 V/div

Input A, B, C, D AC Voltage Accuracy Test (LF)

The test steps for channel C and D are only for the 4-channel models.
This procedure tests the Volts ac accuracy with dc-coupled inputs up to 50 kHz. The high
frequencies are tested in sections, Input A AC Voltage Accuracy (HF) & Bandwidth Test and
Input B AC Voltage Accuracy (HF) & Bandwidth Test.
To prevent possible electrical shock, fire, or personal injury, make sure that the
calibrator is in standby mode before making any connection between the
calibrator and the Test Tool. Dangerous voltages are present on the calibration
source and connection cables during these steps.
To test the Input A, B, C, and D automatic scope ac Voltage measurement accuracy:
1. Connect the Test Tool to the 5502A. See
2. Select the Test Tool setup:
a. Recall the created setup (see
2
(RECALL) and select SETUP, press
E
to recall the setup.
A
b. Press
c. Select Attenuator: Normal | Bandwidth: 10 kHz for the available setting in the
ScopeMeter (2 mV/d and 5 mV/d) or | Bandwidth: 20 MHz (other ranges).
B
d. Press
e. Select Attenuator: Normal | Bandwidth: 10 kHz for the available setting in the
ScopeMeter (2 mV/d and 5 mV/d) or | Bandwidth: 20 MHz (other ranges).
C
f. Press
g. Select Attenuator: Normal | Bandwidth: 10 kHz for the available setting in the
ScopeMeter (2 mV/d and 5 mV/d) or | Bandwidth: 20 MHz (other ranges).
12
5502A Output V DC
+60.0 V
-60.0 V
+150 V
-150 V
+300 V
-300 V
XW Warning
Standard Test Tool
4
, then press
4
, then press
4
, then press
+58.5 to +61.5
-61.5 to -58.5
+142 to +158
-158 to -142
+289 to +311
-311 to -289
Note
Figure 3.
Setup). Press
E
, select the setup name, and press
(INPUT A OPTIONS ...).
(INPUT B OPTIONS ...).
(INPUT C OPTIONS ...).
Reading
S
,