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Voltage Measurement Specifications
Table 16
lists the voltage measurement specifications for the DT9871, DT9871U, DT9872,
DT9873, and DT9874 instruments.
Input voltage range (no compensation)
DT9871U and DT9874 thermocouple channels:
DT9871:
DT9872 and DT9874 RTD channels:
DT9873 and DT9874 voltage channels:
A/D converter resolution
Voltage resolution
DT9871U and DT9874 thermocouple channels:
DT9871:
DT9872 and DT9874 RTD channels:
DT9873 and DT9874 voltage channels:
Sample rate
Input impedance
DT9871U and DT9874 thermocouple channels:
DT9871:
DT9872 and DT9874 RTD channels:
DT9873 and DT9874 voltage channels:
Input common mode voltage
Common mode rejection @ 60 Hz and 50 Hz
Coupling
System linearity
DT9871U and DT9874 thermocouple channels:
DT9871:
DT9872 and DT9874 RTD channels:
DT9873 and DT9874 voltage channels:
System gain error (includes all noise sources; gain = 1)
DT9871U and DT9874 thermocouple channels:
DT9871:
DT9872 and DT9874 RTD channels:
DT9873 and DT9874 voltage channels:
System zero error (includes all noise sources;
no filter)
DT9871U and DT9874 thermocouple channels:
DT9871:
DT9872 and DT9874 RTD channels:
DT9873 and DT9874 voltage channels:
Table 16: Voltage Measurement Specifications
Feature
Specifications
±0.0750 V
±1.2500 V
±1.2500 V
±10 V or ±60 V (software selectable)
24-bits
0.015
V
0.3
V
0.3
V
1.2
V for the ±10 V input range;
12
V for the ±60 V input range
10 Samples/s
5 M
typical
5 M
typical
>100 M
>1 M
(Power ON or OFF)
60 VDC, 30 VAC
> 150 dB
DC
±0.005%
±0.005%
±0.001%
±0.001%
±0.00075% of full-scale range
±0.00075%of full-scale range
±0.00075% of full-scale range
±0.01% of reading
0.25
V RMS
5
V RMS
±12
V
±300
V for the ±10 V input range;
±2 mV for the ±60 V input range
Specifications
a
a
a
119
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