AMETEK PLA-PLW - Manual (Page 16)

Toggled Transient Operation
Toggled transient mode allows the eLOAD input to alternate between two pre-defined load levels as in
Continuous Mode except that the transient points can be triggered instead of an internal transient generator.
STEP Operation:
Step mode lets you generate complex sequences of input changes with rapid, precise timing, which may be
synchronized with internal or external signals. You can program up to 32 settings (or steps) in the profile, the
time interval (dwell) that each setting is maintained, the number of times that the list will be executed, and the
setting’s change in response to the triggers. The step data can be stored in Profile 0, 1, 2 or 3 via either the
front panel or the digital interfaces. Use RCL command to recall the saved state.
Trigger Operation:
The eLOAD has various triggering modes to allow synchronization with other test equipment or events.
Triggering a preset level
Transfers all pending preset levels to the actual level. For the presently active mode, the new level appears at
the input. For the modes which are not presently active, the present levels will not take effect at the input until
the applicable mode becomes active. However you must first initiate the trigger function by executing the
TRIG:IMMED command.
Triggering a transient pulse
A trigger signal will generate a transient pulse of programmable width when pulsed transient operation is in
effect. Triggers can be sent from the front panel by pressing the TRIGGER key or via Remote Interface.
Triggering to a toggle level
A trigger signal will change the input between the main level and the transient level when TOGGLE mode is in
effect. Triggers can be sent from the front panel using the TRIGGER key or via Remote Interface.
Protection Features:
The eLOAD includes the following protection features:
Over Voltage (OV):
The eLOAD has an Over Voltage Protection (OV) set at 105% of the full voltage rating. If the input voltage
exceeds 105% of the over voltage threshold, the input will shut off and an alarm message “OV” will display.
Over Current (OC):
The eLOAD has an Over Current Protection (OC) set at 110% of the full current rating. If the input current
exceeds 110% of the over current threshold, the input will shut off and an alarm message “OC” will display.
Over Power (OP):
The eLOAD has an Over Power Protection function set at 105% (PLW Models) and 110% (PLA Models) of full
Power Rating. If the accumulated energy based on operating voltage and current exceeds the over power
threshold, the input will shut down and display the alarm message “OP”.
Over Temperature (OTP):
The eLOAD utilizes a redundant over-temperature protection structure, which comprises of a temperature
sensor and a thermal switch. Both are designed to force off the eLOAD input during abnormal operating
temperatures. The OTP control algorithm will maintain the eLOAD in its normal temperature range, and in the
case of an OTP condition, the input will be forced off.
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