YOKOGAWA DAQSTATION DX100, Service Manual, Page: 11 / 41

2-3 SM 04L01A01-01E
2
PERFORMANCE TEST
2.3.2 Measurement Accuracy Test
Connection
L N
DC voltage standard
Input terminals
(DC volt and TC inputs)
+
-
+
–
CH1
Decade resistance box
(Model 2793-01 from
Yokogawa Meters &
Instruments Corporation)
The resistance of three lead wires
must be equal.
+/A
-/B
/b
L N
Input terminals
(RTD inputs)
CH1
Figure 2.1 Connection diagram
Procedure
1 Connect the equipment as shown in Figure 2.1
2 Carry out the preparations as described in 2.3.1
3 Apply input voltage/resistance to the DX and verify that the measured value lies
within the tolerance for each range according to the table below.
20 mV
60 mV
200 mV
2 V
6 V
20 V
50 V
Table of tolerance
-20 mV
0 mV
+20 mV
-60 mV
0 mV
+60 mV
-200 mV
0 mV
+200 mV
-2 V
-1 V
0 V
+1 V
+2 V
-6 V
0 V
+6 V
-20 V
0 V
+20 V
-30 V
0 V
+30 V
Input Voltage Range
-20.04 to -19.96
-0.02 to +0.02
+19.96 to +20.04
-60.08 to -59.92
-0.02 to +0.02
+59.92 to +60.08
-200.4 to -199.6
-0.2 to +0.2
+199.6 to +200.4
-2.004 to -1.996
-1.003 to -0.997
-0.002 to +0.002
+0.997 to +1.003
+1.996 to +2.004
-6.008 to -5.992
-0.002 to +0.002
+5.992 to +6.008
-20.04 to -19.96
-0.02 to +0.02
+19.96 to +20.04
-30.06 to -29.94
-0.03 to +0.03
+29.94 to +30.06
Tolerance Specification
±
(0.1% of r 2 digits)
±
(0.1% of r 3 digits)
2.3 Performance Test