28 II Ex
Calibration Information
6
Detailed Specifications
For all detailed specifications:
Accuracy is specified for 2 years after calibration, at operating temperatures of 18 °C to 28 °C, with relative humidity at
0 % to 80 %. Accuracy specifications take the form of ±([% of Reading] + [Number of least-significant digits]). In the 4
½-digit mode, multiply the number of least-significant digits (counts) by 10.
AC Voltage
AC conversions are ac-coupled and valid from 3 % to 100 % of range.
Range Resolution
Accuracy
45 – 65 Hz 30 – 200 Hz 200 – 440 Hz 440 Hz – 1 kHz 1 – 5 kHz 5 – 20 kHz
600.0 mV 0.1 mV
±(0.7 % + 4)
±(1.0 % + 4)
±(2 % + 4)
±(2 % + 20)
[1]
6.000 V 0.001 V
60.00 V 0.01 V
±(0.7 % + 2)
±(2 % + 4)
[2]
Unspecified
600.0 V 0.1 V Unspecified
1000 V 1 V Unspecified Unspecified
Low-Pass Filter
±(1.0 % + 4)
[1]
+1.0 % + 4
-6.0 % - 4
[3]
Unspecified Unspecified Unspecified
[1] Below 10 % of range, add 12 counts.
[2] Frequency range: 1 kHz to 2.5 kHz
[3] Specification increases from -1 % to -6 % at 440 Hz when filter is used.
DC Voltage, Conductance, and Resistance
Function Range Resolution Accuracy
mV dc 600.0 mV 0.1 mV
±(0.1 % + 1)
V dc
6.000 V 0.001 V
±(0.05 % + 1)
60.00 V 0.01 V
600.0 V 0.1 V
1000 V 1 V
Ω
600.0 Ω 0.1 Ω
±(0.2 % + 2)
[2]
6.000 kΩ 0.001 kΩ
±(0.2 % + 1)
60.00 kΩ 0.01 kΩ
600.0 kΩ 0.1 kΩ
±(0.6 % + 1)
6.000 MΩ 0.001 MΩ
50.00 MΩ 0.01 MΩ
±(1.0 % + 3)
[1,3]
nS
60.00 nS 0.01 nS
±(1.0 % + 10)
[1,2,3]
[1] Add 0.5 % of reading when measuring above 30 MΩ in the 50 MΩ range, and 20 counts below 33 nS in the 60 nS range.
[2] When using the rel function to compensate for offsets.
[3] >40 °C temperature coefficient is 0.1 x (specified accuracy)/°C.
Temperature
Range Resolution
Accuracy
[1,2]
-200 °C to +1090 °C
-328 °F to +1994 °F
0.1 °C
0.1 °F
±(1.0 % + 10)
±(1.0 % + 18)
[1] Does not include error of the thermocouple probe.
[2] Accuracy specification assumes ambient temperature stable to ± 1 °C. For ambient temperature changes of ± 5 °C, rated accuracy
applies after 2 hours.
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