Sensitivity Adjustment - Barnant Company 877-9605 Operating Manual

LIQUID-PAD DETECTOR SENSITIVITY CHECK
The LIQUID-PAD Detector sensitivity may be checked as follows:
1. Connect detector to one of the front panel INPUT connectors, if not
already connected.
2. Place water one drop at a time on the detector pad. Do not drop water
from more than one inch.
3. Check number of drops required to activate alarm. Pre-set factory
setting should activate alarm with less than 1 mL of liquid. If activation
level is not as desired, refer to SENSITIVITY ADJUSTMENT Section.
4. After activating alarm, momentarily press then release the RESET
button. Alarm condition should still be present.
5. Wipe detector surface clean with a dry cloth and momentarily press,
then release, the RESET button. Alarm condition should terminate,
ALARM ON indicator should extinguish and, if activated, audible alarm
should turn off.
Generally, no sensitivity adjustment of the LIQUID-SENSOR Controller is
required. However, various liquids or environmental conditions such as
temperature and humidity may require adjustment of the SENSITIVITY
controls for use with the LIQUID-PAD Detectors. The SENSITIVITY
adjustment is accessed through the small hole adjacent to each INPUT
connector. Contact closure or logic level detectors do not require adjustment
of the SENSITIVITY control.
If the factory default setting for sensitivity is not activating the alarm, or is
falsely activating the alarm for the liquid being sensed, adjust the input
sensitivity with one channel connected at a time. Turn the SENSITIVITY
control clockwise to increase sensitivity (fewer drops will activate) or
counterclockwise to decrease sensitivity.
NOTE: If the sensitivity is increased so much that the red ALARM ON
indicator illuminates, the RESET button must be depressed each
time sensitivity is decreased until the indicator extinguishes.
Normal sensitivity adjustment is between one-quarter and two turns
counterclockwise from the activation point. The activation point is defined as
that sensitivity set when ALARM ON indicator just illuminates. Refer to Table
1 for typical sensitivity settings for various liquids. The middle column
indicates the number of turns counterclockwise from the activation point that

SENSITIVITY ADJUSTMENT

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