Trigger Input Test; Trigger Output Test - Fluke 2640A Service Manual

NetDAQ
Service Manual

Trigger Input Test

This test checks the ability of the Trigger Input line to trigger measurement scanning.
1. Configure Trigger Input In NetDAQ Logger for Windows, configure the scan
2. Verify Configuration Channel 1 for Volts DC In NetDAQ Logger for Windows,
3. Start Instrument Scanning Click the Start Instrument button on the Button Bar to
4. Open Logging Status Window Select the Show Logging Status command from the
5. Verify Logging Status Note in the Logging Status window that the Retrieved Scans
6. Set Trigger Input While monitoring the Logging Status window, connect the TI
7. Stop Scanning Click the Stop Instrument button on the Button Bar to stop

Trigger Output Test

This test checks the Trigger Output (125µs logic low) that occurs each time the
instrument scans.
1. Configure Interval Trigger In NetDAQ Logger for Windows, configure the scan
2. Verify Configuration Channel 1 for Volts DC In NetDAQ Logger for Windows,
3. Measure Unset Trigger Output Line Using a digital multimeter, measure the
4. Verify Trigger Output is Enabled In NetDAQ Logger for Windows, click the
5. Connect Trigger Output Connect the TO test lead on the ALARM/TRIGGER IO
6. Start Instrument Scanning Click the Start Instrument button on the Button Bar to
7. Open Spy Window Select the Spy command from the Utilities menu. Select
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parameters for External Trigger with an Interval 2 of 1 second. Be sure Interval
Trigger is not enabled.
verify channel 1 is configured for Volts dc, 3V range.
enable instrument scanning, although no measurement scanning takes place because
the external Trigger Input is not set.
Options menu to display the Logging Status window.
count is zero and not incrementing.
(Trigger Input) test lead to the GND test lead. Note in the Logging Status window,
the Retrieved Scans count increments at 1-second intervals. Disconnect the TI and
GND test lead connection.
instrument scanning.
parameters for Interval Trigger with an Interval 1 of 1 second.
verify channel 1 is configured for Volts dc, 3V range.
output of the unset TO test lead, referenced to the GND test lead, for a voltage
greater than +3.8V dc.
Instrument Config button on the Button Bar. In the Instrument Configuration dialog
box, verify the Trigger Out box is checked. Click OK to return to the Main Window.
connector to the Σ (Totalizer) test lead on the DIGITAL I/O connector. This allows
each Trigger Output pulse to be counted by the Totalizer.
enable instrument scanning.
01TOTAL. Click OK to open the Spy window.
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