PPX40 Front Panel Controls
The PPX front panel controls are similar to their PP model counterparts. The differences include:
A new
Ramp Rate Selector
switch that allows you to choose how quickly voltage will ramp.
A redesigned
Surge Range
switch on the PPX40 model.
An LED arch above the
Voltage Output Control
knob.
E-STOP LEDs indicating when the E-Stop is engaged.
Arc and overcurrent LEDs.
Fig 3:
PPX front panel controls; Baker PPX40 shown.
Item
Description
1
Push to Test (PTT) button enables the output voltage when pressed.
2
E-Stop button turns off the power to the high-voltage power supply and returns the relays to
the safe default position, disabling the output and shorting the output lead.
3
Surge range selector switch (PPX 40 only) selects the output voltage range for surge mode and
which pulsing assembly is used.
4
Ramp rate selector switch allows you to control how quickly voltage will ramp when the
Voltage Output Control Knob is turned. Refer to the table below for specifications.
5
Function Selector switch selects the operational function of the unit, Surge, HiPot (100µA/Div,
10µA/Div, 1µA/Div, Armature test (PPX 30A only).
6
Voltage Output Control knob increases or decreases the output voltage when turned and held.
Turn clockwise to increase the output voltage and counter clockwise to decrease.
When the Push To Test button is released, the setpoint is automatically reset to zero—with the
exception of when the Zero Start override feature is used in Surge mode.
7
Zero-start override. This key switch overrides the Zero Start function and allows the unit to
immediately apply the full target voltage level to the test leads. With the key in the vertical
position, testing starts at zero volts and must be ramped up to the target voltage level. In the
horizontal key position, zero-start override is enabled.
Table 2:
Ramp Rate Selector switch positions, voltage increments, and ramping times.
Position
Volts/second
Time to Full Voltage (seconds)
1
2000
15
2
1000
30
3
500
60
4
250
120
5
125
240
6
63
480
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