Overtemp Led (Ref 1); P-Limit Led (Ref 2); Voltage Display (Ref 3); Cv Indicator Led (Ref 4) - TDK-Lambda PHV Series Operator's Manual

The front panel controls/indicators are described in detail in the following sub-sections.
5.1.1.

Overtemp LED (Ref 1)

Indicates the internal thermal sensor has detected an Overtemperature condition. Causes
are excessive ambient temperature, fan failure, poor ventilation, or excessive accumulated
dust. Allow unit to cool and cycle power OFF/ON to reset the fault. Ensure cooling vents are
clear and clearance around the unit meets the requirements shown in 4.2.
5.1.2.

P-Limit LED (Ref 2)

Indicates the unit is operating in power limit mode
5.1.3.

Voltage Display (Ref 3)

The Voltage Display is a 4½ digit LED indicator showing the voltage measured at the power
supply output. This display flashes and displays the programmed output voltage after the Set
Value button is depressed. Display is active in local and remote
5.1.4.

CV Indicator LED (Ref 4)

Indicates the unit is in CV (Constant Voltage) mode. The power supply regulates the output
voltage at the set point value, while the load current varies as required by the load. Display is
active in local and remote
5.1.5.

Output Voltage Control (Ref 5)

The local voltage set control is a lockable analog 10-turn potentiometer with precision dial,
for setting the output voltage from approximately 0.1% to 100% of rated. This control will
only operate in local mode, if the supply is operated in remote mode the local voltage set
control has no effect.
5.1.6.

OVP Indicator LED (Ref 6)

Indicates the output has reached the OVP (Overvoltage limit) setpoint. The output will be
limited at this voltage.
5.1.7.

OVP Limit Adjustment (Ref 7)

Single-turn screwdriver adjustable potentiometer to set the OVP limit. The OVP limit sets the
maximum output voltage that the supply will deliver, it will not exceed this set point.
Adjustment range is 1-100% of rated voltage. With the OUTPUT OFF, turn the voltage
potentiometer (Item 4 in Figure 1) clockwise to its limit and push the SET VALUES switch to
display set values. Using a screwdriver, adjust the OVP limit with the V-LIMIT potentiometer
(Item 6 in Figure 1). The V-LIMIT LED is illuminated and the limit voltage is displayed on the
VOLTAGE meter.
To operate with no output voltage limit, turn the V-LIMIT potentiometer fully clockwise. The
V-LIMIT LED will extinguish.
Once the OVP Limit has been set, turn the VOLTAGE potentiometer back to the desired set
point and switch display mode to actual values by pressing SET VALUES (Item 7 in Figure
1).
Note: OVP is always active in LOCAL, REMOTE, Analog or Digital programming modes.
5.1.8.

Set Value Button (Ref 8)

Toggles the output voltage and current displays between Actual output Voltage/Current and
the Set Values. The displays flash when they are in the Set Values mode.
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