Performance Verification
Accuracy Performance Tests
4
4-7
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 3-1 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 device 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 device 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 Device Scanning Click the Start Device arrow in the Communication dialog to
start device 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 device scanning.
Trigger Input Tests
The Trigger Input signal pin is found on the rear chassis 8-pin terminal block connector.
This test checks the input signal line for correct level operation.
RS-232 Trigger Input Test
1.
Read Trigger Input Bit Use the TRIN? command to read the Trigger Input bit
through the RS-232 port. A return value of zero indicates that the signal is off (high)
and a value of one indicates it is active low (on).
Содержание 2680A
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