Fluke NetDAQ 2640A, Service Manual

Page: 140 / 260

NetDAQ
Service Manual
4-18
4. Verify Accuracy Configure the Decade Resistance Source for the output values
below and verify the Spy window measurement is between the minimum and
maximum values. Change the channel 1 range as required (see Step 2).
Resistance Range Decade Resistor Minimum Reading* Maximum Reading*
300
Ω
Short Circuit (Zero) 0
Ω
0.1
Ω
300
Ω
290
Ω
289.81
Ω
290.19
Ω
3 k
Ω
Short Circuit (Zero) 0
Ω
1.0
Ω
3 k
Ω
2.9 k
Ω
2.8981 k
Ω
2.9019 k
Ω
30 k
Ω
29 k
Ω
28.981 k
Ω
29.019 k
Ω
300 k
Ω
290 k
Ω
288.37 k
Ω
291.63 k
Ω
3 M
Ω
2.9 M
Ω
2.8600 M
Ω
2.9400 M
Ω
* The resistance accuracy in this table makes allowance for up to 0.01% decade resistance.
Resistance Range 5700A Minimum Reading Maximum Reading
300
Ω
Short Circuit (Zero) 0
Ω
0.1
Ω
300
Ω
190
Ω
189.86
Ω
190.14
Ω
3 k
Ω
Short Circuit (Zero) 0
Ω
1.0
Ω
3 k
Ω
1.9 k
Ω
1.8986 k
Ω
1.9014 k
Ω
30 k
Ω
19 k
Ω
18.986 k
Ω
19.014 k
Ω
300 k
Ω
190 k
Ω
188.90 k
Ω
191.10
Ω
3 M
Ω
1.9 M
Ω
1.8733 M
Ω
1.9267 M
Ω
5. Close Spy Window To close the Spy window, double-click the upper left-hand
corner control-menu box.
RTD Temperature Accuracy Test (Resistance) (2640A) 4-18.
The following RTD accuracy test applies to the 2640A 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.