Справочник Пользователя для Fluke 2640A
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
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)
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.
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
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.
measurement function.