Precision Digital PD650 - Manual (Page 47)

Model PD650 Large Display Process Meter Instruction Manual
47
Set Point Setup and Programming
Overview
The meter is available with 4 alarm points and corresponding front panel status
LEDs as a standard feature. The front panel LEDs are useful for alarm
applications that require visual notification only. For applications that require
relay contacts, such as driving external alarm devices or batch controlling, the
meter can be equipped with either two or four relays. Any of these relays may be
assigned to process/rate or total.
Programming the relays involves four steps:
1. Setting the relay manual reset (ACK Enable) jumpers:
These jumpers (JP5) are located on the Display Board and determine if a
relay can be manually reset.
2. Setting the fail-safe jumper (J5):
Fail-safe mode (default): In the alarm condition, the NC contacts are
connected to the Common contacts of the relays. The fail-safe operation can
be disabled, by removing jumper J5 located on the Options Board.
3. Setting set point functions using SETuP menu:
a. Selecting set points for process/rate or total.
b. Selecting latching or non-latching relay action for process/rate set
points.
c. Selecting preset offset for total set points.
d. Selecting internal or external (I or E) total reset for batch control
applications.
e. Programming delay on release from 1 to 999 seconds if internal total
reset (I) has been selected.
f. Selecting pump alternation control feature for non-latching relays.
4. Programming set, reset, preset, offset, and delay values using the SEtPtS
menu:
a. Set and reset points for alarms (set points) assigned to process/rate
(thus determining high or low alarm status and deadband).
b. Preset values for set points assigned to total.
c.
Preset offset values for set points assigned to total with offset selected.
Note: See Specifications section for description of these functions.