Precision Digital PD6000 - Manual (Page 54)

Model PD6000 Analog Input Process Meter Instruction Manual
54
Time Delay Operation
The following graphs show the operation of the time delay function.
Set
Reset
Relay
LED
*
Input
On Time Delay
>=Tdelay
Set
Reset
Relay
Input
Off Time Delay
>=Tdelay
LED
*
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-mAn ) ” reset mode is selected, the
LED follows the reset point and not the relay state when the re-
lay is acknowledged.