HC-2
3-2
CONTROLS AND INDICATORS
SENSE SWITCH This can be set to CONTACTS or CURRENT mode. When placed in CONTACTS
mode, the unit will react to a change in condition of the SENSE INPUTS. Upon a
change in condition, the TIMER will stop running and the output current will cease to
flow. The TRIP lamp will illuminate as an indication to the operator of a change in
condition.
In CONTACTS mode, sense leads must be properly connected to non-energized
contacts operated by the test specimen or the timer will not shut off when the
test specimen goes open. If the sense leads are not used, the sense switch
must be in CURRENT position for proper functioning.
When the SENSE switch is set to the CURRENT mode, the unit will react to the output
current dropping below 10% of the level of the selected current range.
SENSE INPUTS These are connected to an auxiliary set of contacts (non-energized) regardless if they
are normally open or closed. When RESET is pressed, the unit will remember its
state. If the state changes, the unit will react to this change if the SENSE switch is set
to CONTACTS.
Please do not attempt to connect these to the same set of contacts which you
intend to energize, or energized auxiliary contacts. This may cause damage to
the unit.
CURRENTMETER This displays the RMS value of the output current level of the unit. There are four
ranges available:
2 Amp 1.999
20 Amp 19.99
200 Amp 199.9
2000 Amp 1999
WARNING: Please note that there is no correlation between the currentmeter
range switch setting and the rating of the taps.
MEM/CONT When set to the CONT (continuous) mode, the meter will continuously update to
display the output current level. When placed in the MEM (memory) mode, the meter
will retain the highest output current level achieved. If the level again exceeds this
value, the meter will be updated. If you are below the highest level, pressing RESET
will update the meter to the present level of output.
Please note that the MEM mode of operation will only maintain the reading for a short
time before the reading starts to decay.
TIMER The timer will begin counting when HC ON is pressed and the current surpasses the
10% level. The timer will stop when the current drops below the 10% level in the
SENSE CURRENT mode. When in the SENSE CONTACTS mode, the timer will stop
when a change in the SENSE INPUTS is detected.
The timer can be set to read CYCLES or SECONDS.
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