APT VARIPLUS 105 User manual

Power Converter
For the following model: 105
SAFETYCHECKLIST
KEEP unqualified/unauthorized personnel away from test area
ARRANGE test stations in a safe and orderly manner
NEVER touch products or connections during a test
STOP the test first in the event of a problem
BE SURE to use the appropriate AWG for your input and output cabling
TURN OFF the output when making any connections to the load
WARNING: THIS GUIDE WAS CREATED
FOR OPERATORS HAVING SOME FAMILIARITY
WITH AC POWER SOURCES AND HIGH
VOLTAGE/HIGH CURRENT TESTING APPLICATIONS.
AN AC POWER SOURCE PRODUCES VOLTAGES AND
CURRENTS THAT CAN CAUSE HARMFUL OR FATAL
ELECTRIC SHOCK. TO PREVENT ACCIDENTAL INJURY
OR DEATH, THESE SAFETY PROCEDURES MUST BE
STRICTLY OBSERVED WHEN HANDLING AND USING
AN AC POWER SOURCE.

FRONTPANELCONTROLS
1.1.
1. POWER SWITCH: Rocker style power switch with international ON ( | )
and OFF (0) markings.
2. VOLTAGE DISPLAY: When the output is OFF, the display shows the output
voltage setting. When the output is ON, the display shows the output
voltage measurement.
3. CURRENT/POWER DISPLAY: When the output is OFF, the display shows the
output current setting. When the output is ON, the display shows the output
current measurement. The display can be toggled to show the output power
measurement.
4. SYSTEM KEY: Cycles through the user-system parameters. All parameters
may be edited.
5. DISPLAY KEY: Toggles the Current/Power Display to show either the output
current measurement or the output power measurement.
6. FREQUENCY KEY: Toggles the output frequency to 50 or 60 Hz.
7. OUTPUT/RESET KEY: Enables and disables the output relay.
8. LOCK KEY: Locks out the front panel controls when active. The display may
still be toggled to review output current and power measurements, and the
output frequency may be adjusted.
9. VOLTAGE ADJUST ROTARY KNOB: Increases and decreases the output
voltage. Allows the user to adjust system parameters.
10. UNIVERSAL AC OUTPUT SOCKET: 300 VAC max voltage and 20 A
max current.

BACKPANELCONTROLS
2.
1. THERMAL FAN: Used to cool the instrument.
2. GROUND LUG: Additional ground connector in addition to power cord ground.
3. FUSE RECEPTACLE: Fuse rating is 10 A at 250 V. To change the fuse, unplug the
power (mains) cord and turn the fuse cap counter clockwise to remove fuse.
The fuse compartment will be exposed. Please replace the fuse with one of
the proper rating.
4. INPUT POWER RECEPTACLE: Standard IEC 320 connector for connection to a
standard NEMA style line power (mains) cord.
5. INPUT POWER SWITCH: Line voltage input selection is set by the position of the
switch 115/230 V.

3.
SETTING THE OUTPUT VOLTAGE:
The output voltage is controlled using the Voltage Adjust rotary knob located on the
front panel. Turn the rotary knob clockwise to increase the voltage or turn the rotary
knob counter clockwise to decrease the voltage. The voltage will increase
and decrease more rapidly depending on the speed of rotation.
SETTING THE FREQUENCY:
Press the 50/60 Hz Frequency key to toggle the frequency. The LED will indicate
which frequency the instrument is outputting.
INSTRUMENTSETUP
Voltage Adjust rotary knob
50/60 Hz Frequency key

SETTING THE CURRENT/POWER DISPLAY:
Press the A/W Display key to select whether the Current/Power display will show
amps or wattage. If the LED indicator for A is lit the current will be displayed. If the
LED indicator for W is lit the wattage will be displayed.
SETTING THE LOCK:
Press the LOCK key to lock out the front panel during testing. If the LOCK key is
active, the LED indicator will be lit. When Lock is active, the operator cannot change
any settings from the front panel. If the LOCK key is active when the unit is powered
OFF it will remain active when the unit is powered back ON.
A/W Display key
4.
INSTRUMENTSETUP
Lock key

SETTING THE OUTPUT/RESET:
Press the OUTPUT/RESET key to set the output. If the LED indicator is lit, the decimal
points in the displays of voltage and current/power will blink continuously notifying the
operator that output is ON. If the LED indicator is not lit and the decimal points in the
displays of voltage and current/power are lit steadily this indicates that the output is
OFF. When the output is OFF the displays will show their present settings.
If the Output/Reset LED indicator is flashing, this is a notification that a limit threshold
has been exceeded, a failure has occurred, or an instrument protection circuit has been
activated. Press the OUTPUT/RESET key to reset the instrument to a normal state.
Press the SYSTEM key to change the system parameters. The LED indicator will be on
when the SYSTEM key is activated. The SYSTEM key is only available if the output is off
or the LED indicator is off on the OUTPUT/RESET key. Press the SYSTEM key to cycle
through the parameters. Use the rotary knob to adjust the system parameter settings.
5.
INSTRUMENTSETUP
SYSTEMSETUP
Output/Reset key
DISPLAY EXPLANATION
Voltage Current
V-HI 300.0 High voltage limit setting (0.0 – 300.0 V),
0.0 disables feature
V-LO 0.0 Low voltage limit setting (0.0 – 300.0 V),
0.0 disables feature
Vout LAST Output is set to voltage based on last setting prior to power off when the
instrument is powered up
Vout 0 Output is 0 volts when the instrument is
powered up
P-UP OFF Output relay is open when the instrument
is powered up
P-UP ON Output relay is closed when the instrument
is powered up

6.
SETTING THE VOLTAGE HI LIMIT:
Press the SYSTEM key until the voltage display reads V-HI. Use the rotary knob to
select the high limit voltage (0.0 – 300.0 V). Press the SYSTEM key again to accept
the setting and move to the next parameter setting, low voltage limit.
SETTING THE VOLTAGE LO LIMIT:
Press the SYSTEM key until the voltage display reads V-LO. Use the rotary knob to
select the low limit voltage (0.0 – 300.0 V). Press the SYSTEM key again to accept
the setting and move to the next parameter setting.
SETTING THE SMARTVOLT:
Press the SYSTEM key until the voltage display reads Vout. Use the rotary knob to
select from the following parameters:
The LAST setting will configure the VariPLUS to power up at the same output voltage
that was last used before the unit was powered off. The 0 setting will configure the
VariPLUS to power up at 0 volts regardless of the previous output voltage setting.
Press the SYSTEM key again to accept the setting and move to the next
parameter setting.
SYSTEMSETUP
LAST
0

SETTING THE P-UP:
Press the SYSTEM key until the voltage display reads P-UP. Use the rotary knob to
select from the following parameters:
The OFF setting will configure the instrument to power up with the output relay open.
In this condition, voltage will not be present at the output receptacle during power-on.
The ON setting will configure the instrument to power up with the output relay closed.
VariPLUS at a Glance
VariPLUS – Soft Starting a Device Under Test
VariPLUS – Domestic and International Product Testing
http://aptsources.com/variplussupport/
ONLINE VIDEO RESOURCES
For additional information about these and other key features of the VARIPLUS, please consult the
full Operation and Service Manual or call us toll free [phone] or [phone]
© 2012 Associated Power Technologies www.aptsources.com
VARIPLUS-3/12
Scan the QR code with your
smart-phone or visit the web
addresses listed below to view the
following application videos to
learn more about the VariPLUS.
WARNING: If P-UP is set to ON, voltage will be present at the output
receptacle when the instrument is powered on.
SYSTEMSETUP
OFF
ON