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Page Title:
Rear Panel Connections |
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 3.3.3
(Cont'd)
A. Front Panel Controls (Cont'd)
DISPLAY TIME Control - See Section 3.3.1,C.
INPUT MULTIPLIER - Not used in this mode.
COUNT ON/OFF Switch - This pushbutton switch can be used to control the count accumulation
process. One depression of the switch opens the GATE and starts the process. A second
depression closes the GATE and stops the process. In this way, the unit can be used as a digital
"stop-watch".
MEM. SW - See Section 3.3.2, D. This control is normally to the "off" position in this mode.
MULTIPLIER (Time Resolution) - See Section 3.3.2,C.
B. Rear Panel Connections
A (BNC) - Not used in this mode.
FLOWMETER Connector - Not used in this mode.
CONTROL Connector - See Section 3.3.1, D.
GATE-SW Pin - The counter will count the selected internal clock frequency when this pin is
connected to COMMON and stop counting when the connection is open. These two terminals may
be connected together remotely by mechanical contacts or by a solid state switch. A solid state
switch must be capable of conducting 3 MA maximum with a voltage drop of +0.4 V maximum.
Counter does not reset automatically in this mode and unless the reset process is initiated
manually or remotely, successive time intervals will be summed.
EXT. STOP and START Pins - Provides for control of start and stop of the counting interval.
Counter will totalize the selected internal clock frequency from the receipt of a start pulse at the
START pin until the receipt of a similar pulse at the STOP pin. Where single line control is used,
the pins may be tied together and counter will start and stop on consecutive pulses. Separate
contact closures may be used for start and stop control on these pins. The contact closures should
be to COMMON. Bounce protection is inherent. Reset occurs automatically at the end of display
time.
3-7
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