Fluke 125B/S Calibration Guide - Page 21

Input A and Input B Tests, Input A and Input B Base Line Jump Test

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Industrial ScopeMeter Performance Verification Input A and Input B Tests To verify a measurement, choose items from the menus. To choose an item from a menu: 1. Push . 2. Use  to highlight a selection in the menu. 3. Push  to confirm the selection and go to the next item group (if present). Item groups in a menu are separated by a vertical line. Before you start the Input A and Input B tests: 1. Go to the USER OPTIONS menu. 2. Push  to open the options list. 3. Select Factory Default and push . The Test Tool is set to the Factory Default setup. For most tests, you must turn on Input B. Input A is always on. To Turn on Input B: 1. Push the B button (mV - V). If B is off, the option to turn on B ( on /  off) shows on the display. 2. Push . For most tests, you must pushto select auto ranging. In auto ranging mode, Auto shows on the display of the Test Tool. toggles between Auto and Manual ranging. For some tests, you need to adjust the amplitude of the sine wave on the display. Input A and Input B Base Line Jump Test To check the Input A and Input B base line jump: 1. Use the BB120 banana to BNC adapter, and a 50 Ω (or lower) BNC termination to short circuit the Input A and the Input B shielded banana sockets of the Test Tool. 2. Set up the Test Tool: a. Turn on Input B if necessary. b. Push to select auto ranging (AUTO shows at the top of the display). c. Push . Note  toggles between AUTO and MANUAL ranging. d. Push to open the INPUT SETTINGS A menu (inputs default to A) and make these selections: • Coupling: DC • Readings: Normal • Noise filter: ON 13

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Industrial ScopeMeter
Performance Verification
13
Input A and Input B Tests
To verify a measurement, choose items from the menus.
To choose an item from a menu:
1.
Push
.
2.
Use

to highlight a selection in the menu.
3.
Push
to confirm the selection and go to the next item group (if present).
Item groups in a menu are separated by a vertical line.
Before you start the Input A and Input B tests:
1.
Go to the
USER OPTIONS
menu.
2.
Push
to open the options list.
3.
Select
Factory Default
and push
.
The Test Tool is set to the Factory Default setup.
For most tests, you must turn on Input B. Input A is always on.
To Turn on Input B:
1.
Push the B button (mV – V).
If B is off, the option to turn on B (
on /
off) shows on the display.
2.
Push
.
For most tests, you must push
to select auto ranging. In auto ranging mode, Auto shows on the display of the
Test Tool.
toggles between Auto and Manual ranging.
For some tests, you need to adjust the amplitude of the sine wave on the display.
Input A and Input B Base Line Jump Test
To check the Input A and Input B base line jump:
1.
Use the BB120 banana to BNC adapter, and a 50
Ω
(or lower) BNC termination to short circuit the Input A and
the Input B shielded banana sockets of the Test Tool.
2.
Set up the Test Tool:
a.
Turn on Input B if necessary.
b.
Push
to select auto ranging (AUTO shows at the top of the display).
Note
toggles
between AUTO and MANUAL ranging.
c.
Push
.
d.
Push
to open the INPUT SETTINGS A menu (inputs default to A) and make these selections:
•
Coupling:
DC
•
Readings:
Normal
•
Noise filter:
ON