Fluke NetDAQ 2640A, Service Manual

Page: 142 / 260

NetDAQ
Service Manual
4-20
2. Configure Channel 1 for RTD-4W In NetDAQ Logger for Windows, configure
channel 1 for RTD-4W and RTD R0 for 100 ohms (assuming the reference R0=100;
enter the correct value for R0).
3. Open Spy Window Select the Spy command from the Utilities menu. Select analog
channel 01. Click OK to open the Spy window.
4. Verify Accuracy Insert the RTD and a mercury thermometer in a room-temperature
bath. Allow 20 minutes for thermal stabilization. The value displayed on the mercury
thermometer should equal the value in the Spy 0.15
°
C (2640A) or
+0.32
°
C (2645A) plus sensor inaccuracies.
5. Close Spy Window To close the Spy window, double-click the upper left-hand
corner control-menu box.
Digital Input/Output Tests 4-21.
The Digital Input/Output Tests check the eight Digital I/O lines on the DIGITAL I/O
connector for output and input functions.
Digital I/O Output Test 4-22.
This test checks the Digital I/O lines when used as outputs.
1. Open Spy Window Select the Spy command from the Utilities menu. Select
01DIO. Click OK to open the Spy window.
2. Verify Digital I/O Output for all Unset Lines The Spy window summarizes the 8
DIO binary lines as a decimal equivalent, i.e., 255 for the present condition of all
lines unset (11111111).
3. Measure DIO Lines Using a digital multimeter, measure the output of each DIO
line, referenced to the GND line, for a voltage greater than +3.8V dc.
4. Close Spy Window To close the Spy window, double-click the upper left-hand
corner control-menu box.
5. Configure Channels 1 to 8 for Volts DC In NetDAQ Logger for Windows,
configure channels 1 to 8 for Volts dc, 3V range.
6. Configure Channels 1 to 8 for Alarms In NetDAQ Logger for Windows, configure
each channel 1 to 8 for an Alarm 1 with Alarm Sense=LO, Alarm Value=1 and
Digital Outputs assigned as below.
Channel 1 - Digital Output DO0
Channel 2 - Digital Output DO1
Channel 3 - Digital Output DO2
Channel 4 - Digital Output DO3
Channel 5 - Digital Output DO4
Channel 6 - Digital Output DO5
Channel 7 - Digital Output DO6
Channel 8 - Digital Output DO7
7. Verify Channels and Alarm Configuration After Steps 5 and 6 are completed, the
portion of the Main Window for channels and alarms configuration will appear as
shown below.