Fluke NetDAQ 2640A, Service Manual

Page: 141 / 260

Performance Testing and Calibration
Performance Test
4
4-19
4. Verify Accuracy Configure the Decade Resistance Source for the output values
below and verify the Spy window simulated temperature measurement is between
the minimum and maximum values.
Decade Resistance
Source Value
Simulated
Temperature (
°
C)
Minimum Reading Maximum Reading
100
0
°
C -0.13
°
C +0.13
°
C
200
266.34
°
C 266.13
°
C 266.55
°
C
300
557.70
°
C 557.40
°
C 558.00
°
C
5. Close Spy Window To close the Spy window, double-click the upper left-hand
corner control-menu box.
RTD Temperature Accuracy Test (Resistance) (2645A) 4-19.
The following RTD accuracy test applies to the 2645A and uses the four-wire connection
(see Figure 4-3).
1. Connect the Decade Resistance Source to Channels 1 and 11 Remove the
Universal Input Module from the instrument and connect a cable from the Decade
Resistance Source to the Universal Input Module terminals for channel 1 (Sense) and
channel 11 (Source) as shown in Figure 4-3.
2. Configure Channel 1 for RTD-4W In NetDAQ Logger for Windows, configure
channel 1 for RTD-4W and RTD R0 for 100 ohms.
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 Configure the Decade Resistance Source for the output values
below and verify the Spy window simulated temperature measurement is between
the minimum and maximum values.
Decade Resistance
Source Value
Simulated
Temperature (
°
C)
Minimum Reading Maximum Reading
100 0
°
C -0.31
°
C +0.31
°
C
200 266.34
°
C 265.94
°
C 266.74
°
C
300 557.70
°
C 557.07
°
C 558.33
°
C
5. Close Spy Window To close the Spy window, double-click the upper left-hand
corner control-menu box.
RTD Temperature Accuracy Test (DIN/IEC 751 RTD) 4-20.
The following RTD accuracy test applies to both the 2640A and 2645A and uses the
four-wire connection (see Figure 4-3).
1. Connect the RTD Source to Channels 1 and 11 Remove the Universal Input
Module from the instrument and connect the RTD to the Universal Input Module
terminals for channel 1 (Sense) and channel 11 (Source) as shown in Figure 4-3.