Specifications
2640A/2645A Combined Specifications
A
A-3
Table A-1. 2640A/2645A General Specifications (cont)
Specification Characteristic
Maximum Measurement Speed (Scanning
Rates)
2640A
Slow - 6 readings per second
Medium - 45 readings per second (60 Hz)
Fast - 143 readings per second
(20 configured channels)
2645A
Slow - 54 readings per second (60 Hz)
Medium - 200 readings per second
Fast - 1000 readings per second
(20 configured channels)
Fast single Channel - 400 readings per second
Accuracy of Medium Scanning Rate = (Fast Accuracy + Slow Accuracy)/2
Additional error if “Automatic drift correction” is
turned off.
If the instrument was fully warmed-up at the
time drift correction was disabled, i.e. turned-
on at least 1 hour earlier; 1/10 of the 90 day
specification per °C change in ambient
temperature from the temperature when drift
correction was disabled.
If the instrument was NOT fully warmed-up at
the time drift correction was disabled; Add an
error equal to the 90 day specification for
instrument warm-up + 1/10 of the 90 day
specification per °C change in ambient
temperature from the temperature when drift
correction was disabled.
2640A/2645A Environmental Specifications A-4.
Table A-2 provides a summary of the environmental specifications for the
2640A/2645A.
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