Vertu Series VPM3000 Process Meters & Temperature Transmitters
Instruction Manual
24
Low Alarm Operation (Set < Reset)
For Manual reset mode, ACK can be pressed anytime
to turn "off" relay. For relay to turn back "on", signal
must go above set point, and then go below it.
Time Delay Operation
The following graphs show the operation of the time
delay function.
If 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: The LED is not affected by Time Delay when
“Automatic or Manual” reset mode is selected.
Rather the LED follows the set and reset points.
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