3A SERIES
OPERATION MANUAL
Entire Contents Copyright
2014 by Adaptive Power Systems, Inc. (APS) • All Rights Reserved • No reproduction without written authorization from APS.
3A SERIES AC & DC LOAD OPERATION MANUAL
Page 26 of 56
Key # Description
WATT ON mode
In WATT mode (see 9), the upper display shows the measured true
power consumed by the load in Watts.
LIMIT ON mode
In LIMIT mode, the upper display shows the UPPER limit settings for
No/Go mode measurement limits in the following sequence:
Vrms
Arms
W
VA.
PROTECTION mode
If an over voltage condition has triggered the OVP protection mode,
the upper display will display “oVP”
FREQ ON mode
If FREQ mode is set to ON (see 15), the Frequency, Bank and Sync
setting information will be displayed on the upper LED display in the
following order:
Frequency setting “FrEq”
Bank selection “bAn”
SYNC selection
“Sync”.
6
This is the lower 4½ digit multifunction display. It’s function depends on the operating mode the
load is in as described in the next rows:
PRESET OFF mode
The lower display will show the load current in Arms.
PRESET ON mode
The lower display will show the pre-set values for manual or remote
control mode for the active operating mode:
CC and LIN Modes: Displays set value of CC level A and B in Arms.
CR Mode:
Displays set value of R level A and B in
Ω
.
Protection Mode:
If over current, over power or over temperature
conditions are detected, this display will show “oCP”, “oPP” or “oTP”.
LIMIT ON mode
In LIMIT mode, the lower display shows the LOWER limit settings for
No/Go mode measurement limits in the following sequence:
Vrms
Arms
W
VA.
PROTECTION mode
If an over voltage condition has triggered the OVP protection mode,
the upper display will display “oVP”
FREQ ON mode
If FREQ mode is set to ON (see 15), the lower display will show:
Frequency:
Frequency setting as DC or 0.1 through 400Hz.
Bank:
0 through 10
Sync:
ON or OFF
7
PRESet Key and annunciator
Pressing the “PRES” key will toggle the PRESET mode ON or OFF. When ON, the A and B set
values for the selected mode can be set and are displayed on the LED read-outs.
When OFF, it means the set A and B levels are the active setting for the load. In PRESET OFF
condition, the upper 4 1/2 digit monitor displays the voltage input to load in Vrms while the
lower 4 1/2 digit monitor displays the current flowing into electronic load in Arms.
In PRESET ON condition, the PRES LED indicator is lit and both upper and lower 4 1/2 digit
monitors will have different displays depending on selected operating mode as shown below:
CC mode
The set values of Level A / B load current are displayed on the lower 4
1/2 digit monitor in Arms. “Arms” annunciator is ON.
LIN mode
The set values of Level A / B load current are displayed on the lower 4
1/2 digit monitor in Arms. “Arms” annunciator is ON.
CR mode
The set values of Level A / B load resistance are displayed on the lower
4 1/2 digit monitor in
Ω
. The “
Ω
“annunciator is ON.
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