Under Temperature Warning; Input Contactor Control - Ametek Amrel PLA Series Operation Manual

Remote Programming:
Setting up the Remote Connection:
1) Connect the eLoad to the PC via GPIB/RS-232/USB/ETHERNET Cables
2) Follow the eTOOL1 Guide to communicate with the eLoad via remote interface
3) Once connected, type *IDN? to query the unit
SCPI Commands:
Set the eLoad in CC or CP Mode → MOD:CURR OR MOD:POW
Set the Main Level to 0Adc or the desired current level → ISET or CURR <NRF>
Set the Peak Level (> Main Level Setting) to load the DUT → CURR:TLEV <NRF>
Set the Power Interruption Pulse Width → TRAN:PINT:TWID 200 μs ~ 25000 μs
Set the System Bandwidth → (OSC3, OSC2, OSC1 and DEFAULT)
Activate PINT (Power Interruption Mode) → TRAN:MOD PINT or TRAN:MOD 7
Activate the INPUT → INP 1 or INP ON
Activate the PULSE mode → TRAN 1 or TRAN ON
Send TRIGGER signal to activate Power Interruption → *TRG or TRIG
2. UNDER-TEMPERATURE TRIP WARNING MESSAGE (UTT):
When the heat sink temperature persists at 15 degrees Celsius or below for longer than 10 minutes, a UTT
warning message will display on the front panel along with an operational status register bit (bit 11). The
warning message indicates the eLoad is operating continuously at low temperatures that may cause
condensation; please verify inlet/outlet water pressure differential and temperature are within requirements.
Proceed testing with caution to ensure the UTT message does not continue. If message still occurs, please
contact AMETEK Technical Support.
Local Control
NONE
Remote Programming
NONE

3. INPUT CONTACTOR CONTROL:

The AMREL eLoad provides a selectable dc Contactor control signal via the INPUT CONTACTOR feature.
A TTL active high signal (+5Vdc) or TTL active low signal (0Vdc) will be delivered to the Port_0 (Pin 9) of
the 12-pin External Programming Port prior to the eLoad input turning on and after the eLoad turns off, to
activate/deactivate an external contactor/relay. To allow time for an external dc contactor to open or close and
activate the output of the DUT, the Input Contactor feature offers a programmable delay (50 ~ 500ms) that will
delay the eLoad input during load on sequence and the Port_0 signal during load off sequence. The TTL
signal is useful for controlling driver circuits for external relays or contactors to isolate an eLoad system from
high power DUT during the off-state of the testing application.
Port 0+ @ On
Port 0- @ On
Disable
Delay
M470039-01 REV-F
TTL-High Control Signal at input on;
TTL-Low Control Signal at input on;
Disable Input Contactor function; Port_0 function released
Time delay constant before input on and after input off.
Parameter: 50~500ms
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