15
PREV SCREEN:
This function button returns the operator to the previous display
screen, which would be the
TEST MENU
Screen.
ARM M/S:
This function button arms the initiate circuit for initiation of the output current
when operating two SR-98’s in the Master / Slave mode. When pressed, the
CURRENT
MAIN
outputs will initiate simultaneously when the Master SR-98
INIT
button is pressed.
Note: Both the Master and Slave
ARM M/S
buttons must be pressed prior to pressing
the Master
INIT
button. See
SELECTION OF MASTER UNIT
for more details.
TIMER SETUP:
This function button selects the TIMER SETUP Screen. The TIMER
SETUP Screen was described earlier.
TIMER RESET:
This function button allows the operator to reset the Timer prior to
doing a timing test.
MODE SELECT:
This function button allows the operator to select
MOM
(Momentary),
MAINT
(Maintained) or
CA
(Current Actuate) operation of the CURRENT MAIN output.
The
MOM
mode is used to set test currents quickly and reduces heating of the device
under test. The
MAINT
mode is normally used when turning on outputs for an indefinite
period of time (such as timing tests). The
CA
mode is used when timing instantaneous
only, small, single-pole molded case circuit breakers. When in the CA mode the
sampling rate is changed in order to capture very short operating times of single pole
breakers. Since single pole breakers do not have contacts to monitor, the SR-98
monitors the current through the breaker under test. When the current is interrupted by
the breaker operation, the SR-98 captures the short operating time and displays it. This
feature is only used when testing instantaneous, single-pole, molded case circuit
breakers. For timing tests of short and long time delay molded case circuit breakers, the
MAINT
mode is used.
Summary of Contents for SR-98
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