17
8 Specifications
Specifications are based on a one year calibration cycle and apply from +18
℃
to
+28
℃
unless stated otherwise. All specifications assume a 10 minute warmup period.
8.1 DC Voltage Measurement
Range
Maximum
measurement range
Resolution
Accuracy (% of r Count)
ETX-1812
ETX-2012
30V
0V
～
31V
0.001V
0.05+2
0.02+2
-10
℃～
18
℃，
+28
℃～
55
℃
temperature coefficient,±0.005%FS/
℃
.
Input resistance:
＞
1MΩ.
8.2 Resistance Measurement
Range
Maximum
measurement
range
Resolution
Accuracy (Ω)
ETX-1812
ETX-2012
2-wire,
3-wire
4-wire
2-wire,
3-wire
4-wire
400Ω
0
～
440Ω
0.01Ω
0.25
0.15
0.15
0.10
3200Ω
420Ω
～
3600Ω
0.1Ω
1.5
1.0
1.0
0.5
-10
℃～
18
℃，
+28
℃～
55
℃
temperature coefficient,±0.005%FS/
℃
.
Exciting current during measurement:
400Ω
：
1.0mA±10%;
3200Ω
：
0.2mA±10%;
Two-wire: Conductor resistance is excluded from errors.
Three-wire: Matching test line should be used. The total resistance of conductor should not be larger
than
25
Ω.
