Programming Confirmation
To verify that the alarm set and reset points have been programmed
as desired, push
ENTER
, and push
ENTER
again when
ALArS
appears. Before the display stops flashing #1 set point value, push
ENTER
again to advance the display to #1 reset point. Continue
skipping through the remaining alarm set and reset points. To alter an
alarm point value, wait for the first digit to flash and program the
desired value using the
Five Basic Digit/Display-setting Instructions on
page 19.
Alarm Operation
When the meter detects an alarm, a front panel LED illuminates to
indicate which alarm point has tripped. This LED will stay illuminated
until the meter display passes through the reset point.
Set Relays for Fail-safe Operation
In the fail-safe mode, the relay coils are energized and the Normally
Open (NO) contacts are connected to the Common (C) contacts under
normal operation. During an alarm condition, the relay coils are
de-
energized, the Normally Closed (NC) contacts are connected to the
Common (C) contacts. During a power failure the relay contacts
reflect an alarm condition.
Figure 14: Option Card Installation
Model LI1X Universal Process Meter
Instruction Manual
Model LI1X Universal Process Meter
Instruction Manual
28
29
Alarm Acknowledgment
The ACK button on the front panel resets the optional relays only and
has no effect on the alarm status LEDs.
Automatic & Manual Reset Programming
There are two ways to reset the relays:
1. Automatically when the signal passes through the reset point.
2. Automat manually via the front panel ACK button, or a user
supplied momentary Normally Open push-button across terminals
AK and CM at the rear of the instrument. That is, a relay may be
manually reset prior to the signal passing through the reset point
or it will automatically reset when the signal passes through the
reset point.
A manual reset will reset all relays that are programmed for
aut manual reset.
Figure 15: Relay Reset Jumpers
An array of jumpers located behind the front panel on the Display
PCB is used to program each relay for either automatic or aut
manual reset. Refer to page 32 for front panel removal instructions.
The top jumper is used for relay 1, the next for relay 2, etc. A relay
will automatically reset if no jumper is installed. A relay will automati-
cally reset, plus can be manually reset, if a jumper is installed over its
respective pins.
Example Above:
Relay 1 is programmed for automatic reset;
Relays 2, 3, & 4 are programmed for aut manual reset.
Relays
Ribbon Cable
Front
J2
Screw
T
erminals (Rear of PCB)
The failsafe
operation can
be disabled
by removing
jumper
J2
located at the
front of the
relay option
card (see
figure to left).
Refer page 32
for option
card installa-
tion and
removal.
1
2
3
4
Spec Tech Industrial Electric
www.spectechind.com
888-773-2832
Spec Tech Industrial Electric
www.spectechind.com
888-773-2832
