Fluke NetDAQ 2645A - Manual (Page 113)

Configuring NetDAQ Logger for Windows
Configuring Channels
3
3-19
Configuring Analog Channel Functions 3-25.
Analog channel functions include volts dc, volts ac, ohms, temperature
(thermocouple and RTD), frequency, and dc current. To configure analog channel
functions, complete the following procedure:
1. Select an analog channel in the Channels Configuration dialog box.
2. Click Function to open the Function Selection dialog box.
3. Select the function and range. If desired, enter a custom nine-character Units
Label. The default units are VDC, VAC, Ohms, °C or °F, Hz, Amps (0-100
mA current range), and Percent (4-20 mA current range).
If the function is Current, you can enter the resistance of the current shunt.
The range is 10 to 250 Ohms and the default is 10 Ohms. If the function is
RTD-2W or RTD-4W, you can enter R0, the RTD Ice point. The range is 10
to 1010 Ohms and the default is 100 Ohms. If the range is Custom-385, you
can enter the RTD probe constant, Alpha. The range is 0.00374 to 0.00393
and the default is 0.00385055 . See Appendix D for more information.
If the function is TC, you can check Open Thermocouple Detect. If selected,
the instrument monitors thermocouple continuity. If continuity is lost, otc
appears on the instrument front panel during monitor for the thermocouple,
“Open TC” appears in the Spy and Quick Plot windows, and the data file
records the value 9.0E+9. If not selected, an open thermocouple may result in
+OL on the instrument front panel during monitor. “+Overload” appears in
the Spy and Quick Plot windows and the data file records the value 1.0E+9.
4. Click OK.
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