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Table 1-3. 2620A/2625A Specifications
The instrument specifications presented here are applicable within the conditions listed in the
Environmental portion of this specification.
The specifications state total instrument accuracy following calibration, including:
• A/D errors
• Linearization conformity
• Initial calibration errors
• Isothermality errors
• Relay thermal emf’s
• Reference junction conformity
• Temperature coefficients
• Humidity errors
Sensor inaccuracies are not included in the accuracy figures.
Accuracies at Temperatures Other Than Specified
To determine typical accuracies at temperatures intermediate to those listed in the specification
tables, linearly interpolate between the applicable 0oC to 60oC and 18oC to 28oC accuracy
specifications.
Response Times
Refer to Typical Scanning Rate and Maximum Autoranging Time later in this table.
DC Voltage Inputs
Resolution
Range Slow Fast
300 mV 10 µV 0.1 mV
3V 0.1 mV 1 mV
30V 1 mV 10 mV
300V 10 mV 0.1V
Accuracy ±(% ±V)
Range 18°C to 28°C0°C to 60°C
90 Days, Slow 1 Year, Slow 1 Year, Fast 1 Year, Slow 1 Year, Fast
300 mV 0.026% + 20 µV 0.031% + 20 µV 0.047% + 0.2 mV 0.070% + 20 µV 0.087% + 0.2 mV
3V 0.028% + 0.2 mV 0.033% + 0.2 mV 0.050% + 2 mV 0.072% + 0.2 mV 0.089% + 2 mV
30V 0.024% + 2 mV 0.029% + 2 mV 0.046% + 20 mV 0.090% + 2 mV 0.107% + 20 mV
300V 0.023% + 20 mV 0.028% + 20 mV 0.045% + 0.2V 0.090% + 20 mV 0.107% + 0.2V
Input Impedance
100 MΩ minimum in parallel with 150 pF maximum for all ranges 3V and below 10 MΩ in parallel
with 100 pF maximum for the 30V and 300V ranges.
Normal Mode Rejection
53 dB minimum at 60 Hz ±0.1%, slow rate
47 dB minimum at 50 Hz ±0.1%, slow rate
Common Mode Rejection
120 dB minimum at dc, 1 kΩ imbalance, slow rate
120 dB minimum at 50 or 60 Hz ±0.1%, 1 kΩ imbalance, slow rate
Maximum Input
300V dc or ac rms on any range for channels 0, 1, and 11
150V dc or ac rms for channels 2 to 10 and 12 to 20
Voltage ratings between channels must not be exceeded
Crosstalk Rejection
Refer to "Crosstalk Rejection" at the end of this table.