PTE-50-CET
Sheet 23
3.3.2.2. OPTICAL INDICATORS AND DISPLAYS
a) LED indicator for 2
nd
value selection
This is a 3 mm, red LED that is situated over the corresponding key. When this
LED is lit, it indicates that it is in the
2
nd
Value Selection
mode and that this value
is shown in the display.
b) LED indicator when 2
nd
value is activated
This is a 3 mm, red LED that is situated over its corresponding press key. It has
two states:
•
Not lit: indicates that the phase angle in the output is the first value.
•
Lit: indicates that the phase angle in the output has changed to the
second value.
c) Alarm indicators
There are two, 3 mm LEDs (red) which indicate the status of the two alarms
for the output of PTE-50-CET. They are as follows:
1. Ovl: this LED indicates an overload in the output, whether it is current or voltage. When
it is lit, the output will cut off and the display will begin to flash for 5 seconds. During this
time it is possible to reset the output by pressing the ON/OFF button.
2. Th: this LED indicates an internal thermal overload, (temperature overload). When this
alarm is on, the LED will light up, and the output will cut off. While this LED is on it is not
possible to work with the unit and the operator must wait until the internal temperature
lows.
NOTE:
When the thermal alarm is lit, turn off the unit for at least 1/2 hour.
d) Digit selection indicator
These three, 3 mm LEDs (red), indicate the digit selection for regulation.
Only one will be lit and it indicates the digit above it to be regulated.
