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Specifications
2640A Specifications
A
A-7
2640A/2645A Totalizer A-10.
Table A-7 provides a summary of the Totalizer specifications. The Totalizer input
is located on the DIGITAL I/O connector, terminals ∑ and GND.
Table A-7. 2640A/2645A Totalizer Specification
Specification Characteristic
Maximum Input Voltage 30V
Minimum Input Voltage -4V
Minimum Peak Voltage 2V
Isolation None (dc coupled)
Threshold 1.4V
Hysteresis 500 mV
Input Debouncing None or 1.75 ms (selectable)
Maximum Transition Rate 5 kHz (Debounce disabled)
500 Hz (Debounce enabled)
Maximum Count 4,294,967,295
2640A/2645A Real-Time Clock and Calendar A-11.
Table A-8 provides a summary of the battery powered real-time clock and
calendar.
Table A-8. 2640A/2645A Real-Time Clock and Calendar
Specification Characteristic
Accuracy 1 minute per month for 0°C to 50°C range
Battery Life >15 unpowered instrument years for -20°C to
28°C (32°F to 82.4°F).
>6 unpowered instrument years for -20°C to
50°C (32°F to 122°F).
>4 unpowered instrument years for 50°C to
70°C (122°F to 158°F).
2640A Specifications A-12.
This section includes specifications specific to the 2640A instrument by
measurement function.