AMETEK Programmable Power Sorensen XPF Série Mode D'emploi page 19

The default input voltage scaling is 0V to 5V for 0 to 100% of the maximum output current. The
input voltage scaling can be changed to be 0V to 10V by changing an internal shorting link.
Disconnect the instrument from the AC source and remove the cover as follows.
Remove the plastic push-rivets at each side edge of the top cover. Unse the blade of a small
screwdriver to first ease out the rivet head and then fully remove the rivet body. Remove the three
rear panel screws securing the top cover; slide the cover back and lift off.
Referring to the top view of the instrument shown in the drawing, move the tall shorting link in
position LK3 to link centre and '10V' pins instead of centre and '5V' pins.
Remote CC can be used with either Local or Remote CV.
CAUTION. Do not apply external control voltages to either the CV or CC input that exceed
the maximum for the set input range (5V or 10V). The inputs are protected against excess
voltages but the instrument will attempt to supply an output voltage or current in excess of its
maximum rating if the control voltage exceeds its range limit, with possible consequential
damage.
Practical Considerations when using CV and CC
The stability of the control voltages directly affects the stability of the output. Any noise on the
control signals will generate noise on the output. To minimise noise on the output connect the
control voltages to the CV, CC and RTN inputs using twisted or screened pairs (screens grounded
at one end only) and keep the connections as short as possible. Note that output noise is
inherently slightly higher when analogue remote control is used because of intrinsic noise in the
isolating input circuitry, see the Specification.
The diagrams below show the connections for Constant Voltage (CV) and Constant Current (CC)
control using an external voltage.
Constant Voltage Control
Note that when the OUTPUT is on, the instrument's display always shows the actual output voltage
and current, whichever control source is active. However, when the OUTPUT is off, the display will
show the preset voltage and current set by the front panel controls (or the digital interface if active)
and not the values determined by the CV and CC inputs even if they have been made active (CV
and CC set to Remote). To avoid confusion it is good practice to set the front panel controls to
minimum when remote CV and CC are used.
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Constant Current Control