190 Series III
Service Manual
4
Equipment Requirements for Verification
The primary source instrument used in the verification procedures is the Fluke 5502A. If a
5502A is not available, you can substitute another calibrator as long as it meets the minimum
test requirements.
Requirements:
Fluke 5502A Multi-Product Calibrator, including SC600 Oscilloscope Calibration Option.
Stackable test leads (4x) as supplied with the 5502A.
50
Ω
Coax Cables (2x): use Fluke PM9091 (1.5 m, 3/set) and PM9092 (0.5m, 3/set).
Male BNC to Dual Female BNC adapter (1x), Fluke PM9093/001.
50
Ω
feed-through termination, always use Fluke TRM50 for Fluke 190-502, 190-504, and
MDA-550-III. The TRM50 is included with the purchase of the 190-50x models as a
standard.
Dual Banana Plug to Female BNC Adapter (1x), Fluke PM9081/001.
Dual Banana Jack to Male BNC Adapter (1x), Fluke PM9082/001.
10:1 or 100:1 Voltage Probes as supplied with Test Tool.
General Operation Instructions
Use these general instructions for all tests:
1. Power the Test Tool with the BC190 power adapter. The battery pack must be installed.
2. Allow the specified warm-up period for the 5502A.
3. For each test point, wait for the 5502A to settle.
4. Allow the Test Tool a minimum of 30 minutes to warm up.
One division on the LCD consists of 25 pixels (1 pixel = 0.04 division).
This procedure is set up for all models of the Test Tool. These have either two oscilloscope
channels A and B with BNC inputs and a multimeter channel with banana inputs, or four
oscilloscope channels. The figures that show the connection between calibrator and Test Tool
are universal and also show the connection between the calibrator and a Test Tool with four
oscilloscope channels (for example, model 190-204 and 190M-4).
Reset the Test Tool
To reset the Test Tool:
1. Press
O
to turn off the Test Tool.
2. Press and hold
U
.
3. Press and release
O
to turn on the Test Tool.
4. Wait until the Test Tool beeps twice and then release
U
.
Two beeps indicate a successful reset.
