Master Alarm Output Tests; Rs-232 Master Alarm Output Test; Fluke Daq Master Alarm Output Test - Fluke 2680A User Manual

2680A/2686A
Users Manual

Master Alarm Output Tests

The Master Alarm signal pin is found on the rear chassis 8-pin terminal block
connector. This test checks the Master Alarm output signal line for correct logic
level operation. See Figure 2-3 for the Master Alarm signal pin location.

RS-232 Master Alarm Output Test

1. Connect Test Leads to ALARM/TRIGGER I/O Connector Remove the
8-position ALARM/TRIGGER I/O connector from the instrument rear panel.
Connect a test lead to each line, Master Alarm, Trigger Output, Trigger Input,
plus a test lead to the GND line.
2. Measure Line Using a digital multimeter, measure the output of the Master
Alarm test lead, referenced to the GND test lead, to check if the voltage is
greater than +3.8 V dc.
3. Set or Clear Master Alarm Bit To set or clear the Master Alarm bit through
the RS232 port use the MAOUT 1 command to turn on the alarm output and
the MAOUT 0 command to turn off the alarms output. When the alarm is on,
the output should be less than 1 V.

Fluke DAQ Master Alarm Output Test

1. Connect Test Leads to ALARM/TRIGGER I/O Connector Remove the
8-position ALARM/TRIGGER I/O connector from the instrument rear panel.
Connect a test lead to each line, Master Alarm, Trigger Output, Trigger Input,
plus a test lead to the GND line.
2. Measure Line Using a digital multimeter, measure the output of the Master
Alarm test lead, referenced to the GND test lead, to check if the voltage is
greater than +3.8 V dc.
3. Verify Configuration Channel 1 for V dc In Fluke DAQ, verify channel 1 is
configured for V dc, 3 V range.
4. Verify Configuration Channel 1 for Alarms In Fluke DAQ, verify channel
1 is configured for an Alarm 1 with Alarm Sense=LO, Alarm Value=1 and
Digital Output=DO0.
5. Start Instrument Scanning Click the Start Instrument arrow in the
Communication dialog to start instrument scanning. Scanning is initiated to
enable the Master Alarm output. Apply 0 V to channel 1.
6. Measure Line Using a digital multimeter, measure the output of the Master
Alarm test lead, referenced to the GND test lead, for a voltage less than
+0.8 V dc.
7. Stop Scanning Click the Stop button to stop instrument scanning.
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