P
RO
V
U
™ PD6402 High Voltage & mV to Current Meter
Instruction Manual
29
Low Alarm with Fail-Safe
Operation (Set < Reset)
Note: Relay coil is energized in non-alarm condition. In case of power failure,
relay will go to alarm state.
Time Delay Operation
The following graphs show the operation of the time
delay function.
When the signal crosses the set point, the
On
time
delay timer starts and the relay trips when the time
delay has elapsed. If the signal drops below the set
point (high alarm) before the time delay has elapsed,
the
On
time delay timer resets and the relay does not
change state. The same principle applies to the
Off
time delay.
Note: If
“
Automatic or Manual
(
A-nmAn
)”
reset
mode is
selected, the LED follows the reset point and
not the relay state when the relay is
acknowledged.
