Contact pair is open, No alarm condition), Leak detected – Geist Leak Detection Kit User Manual
Page 3: Cable fault
Leak Detection Kit quick setup guide (rev.131111B-GD)
3
RELAY MODE jumper:
Controls the behavior of the output relays when a leak-detection or cable-fault event
occurs. In “supervised” mode, both relays are energized when conditions normal, and
de-energize when an alert occurs; in “non-supervised” mode, the relays are de-energized
when conditions are normal, and energized when an alert occurs. This action is illustrated
by the diagrams below: (Note that the terms “normally open” (NO) and “normally
closed” (NC), when describing relay actions, refer to the state of the relay contacts in the
relay’s “normal”, i.e. de-energized state, not to “normal” as in normal room conditions!)
NON-
SUPERVISED
MODE
SUPERVISED
MODE
(recommended)
with no alarm condition,
both relays are
de-
energized
, and the NC
contact pairs are closed.
with no alarm condition,
both relays are
energized
, and the NO
contact pairs are closed.
when water is detected
on the cable, the LEAK
relay
energizes
, and its
NO contact pair closes
when water is detected
on the cable, the LEAK
relay
de-energizes
, and
its NC contact pair closes
if a cable fault is
detected, the FAULT
relay
energizes
, and its
NO contact pair closes
if a cable fault is
detected, the FAULT
relay
de-energizes
, and
its NC contact pair closes
LOW
(alarms on 6” (152mm)
of wetted cable)
HIGH
(alarms on 0.5”
(13mm) of wetted cable)
MEDIUM
(alarms on 2” (51mm)
of wetted cable)
SENSITIVITY jumper:
Adjusts the sensitivity to dampness along the detection cable. The default setting is
low, which is generally sufficient for detecting spills from broken pipes or overflowing
tanks; however, if your particular application involves smaller leaks, such as from an
air-conditioner’s drip pan, the medium or high sensitivity settings may be required instead.
Higher sensitivity may also be required if you need to detect leaks of distilled or deionized
water, or other fluids which are only weakly conductive. You may need to experiment to
find the best setting for your particular requirements. (Note: if you change this jumper
setting, you must power-cycle the LD300 for it to recognize the change.)
contact pair is closed
NC
NC
NO
NO
C
C
FAULT
LEAK
(no alarm condition)
X
X
X
contact pair is open
NC
NC
NO
NO
C
C
FAULT
LEAK
leak detected
X X
NC
NC
NO
NO
C
C
FAULT
LEAK
cable fault
X
X
NC
NC
NO
NO
C
C
FAULT
LEAK
(no alarm condition)
X
X
NC
NC
NO
NO
C
C
FAULT
LEAK
leak detected
X
X
NC
NC
NO
NO
C
C
FAULT
LEAK
cable fault
X X