Filter
Top Products
HYDRA
Service Manual
1-20
Table 1-4. 2635A 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 0°C to 60°C and 18°C to 28°C accuracy
specifications.
Response Times
Refer to Typical Scanning Rate and Maximum Autoranging Time later in this table.
DC Voltage Inputs
Resolution
Range Slow Fast
90 mV* 1 µV 10 µV
300 mV 10 µV 0.1 mV
3V 0.1 mV 1 mV
30V 1 mV 10 mV
150/300V 10 mV 0.1V
900V* ** 10 µV 0.1 mV
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
90 mV* 0.29% + 7µV 0.034% + 7 µV 0.054% + 20 µV 0.074% + 7 µV 0.094% + 20 µV
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
150/300V 0.023% + 20 mV 0.028% + 20 mV 0.045% + 0.2V 0.090% + 20 mV 0.107% + 0.2V
900 mV 0.026% + 20 µV 0.031% + 21 µV 0.047% + 0.2 mV 0.070% + 20 µV 0.087% +0.2 mV
* Not used in Autoranging.
** Computer interface only (see FUNC command).