Sentry 110 Manuale utente
Model 110 Operating Manual
Sentry Liquid Level Alarm
Page 1
Sentry
LIQUID LEVEL ALARM
MODEL 110
www.aquaticsentry.com
OPERATING MANUAL
WIRELESS
Page 2 Model 110 Operating Manual
Sentry Liquid Level Alarm
Rev 2.2 April 2023
Serial #DW110-01796 and up
TABLE OF CONTENTS
1. SAFETY PRECAUTIONS.................................................................. 3
2. APPLICATION ................................................................................... 3
2.1 HIGH Liquid Level Alarm
2.2 LOW Liquid Level Alarm
2.3 Optional Relay Output
3. INSTALLATION ................................................................................. 4
3.1 Mount Indoor Alarm Display
3.1.1 Installer Code and/or Radio Frequency
3.2 Mount the Outdoor Transmitter
3.2.1 Setting HIGH or LOW level function
3.2.2 Setting up Installer code or Radio Frequency
3.2.3 Install Batteries
3.3 Suspend the Probe
3.4 Test the alarm
3.4.1 HIGH Alarm
3.4.2 LOW Alarm
4. OPERATION and TROUBLESHOOTING........................................ 12
4.1 State Table and Troubleshooting - Indoor Alarm Display
4.2 Outdoor Enclosure Probe Assembly
4.3 Changing Installer Code or Radio Frequency
4.3.1 Program the Indoor Display
4.3.2 Program the outdoor transmitter
4.4 Wireless Transmission Timing
5. MAINTENANCE............................................................................... 14
5.1 Battery Change
6. SPECIFICATIONS ........................................................................... 15
6.1 Indoor Alarm Display
6.2 Outdoor Transmitter
6.3 IC and FCC 15 Approval
7. WARRANTY .................................................................................... 16
Printed in Canada
Model 110 Operating Manual
Sentry Liquid Level Alarm
Page 3
1. SAFETY PRECAUTIONS
The potential for electrical shock exists whenever water is present
near conductive electrical equipment. Check for sources of electricity
from other nearby devices before working on this equipment. There
is no possibility of serious shock from the energy levels used by this
alarm. The low voltage DC and transformer isolation provide safety
when handling or opening the enclosures or the probe. Best practice,
however, is to disconnect power when working on this equipment.
2. APPLICATION
The Sentry liquid level alarm continuously monitors a water level, rising
(high level) or falling (low level), that may cause an alarm condition.
Application examples are pump chambers, cisterns, holding tanks,
sumps, oor drains, irrigation channels or truck tanks. The alarm also
performs self-diagnostics, continuously testing that all components are
operating correctly. The battery powered outdoor probe communicates
with the indoor alarm display up to 90 m (300 feet) range. The indoor
alarm display will ash an LED and sound an audible alarm. Audio can
be muted with the pushbutton. When the alarm condition is corrected
the audio will reset.
• Green indicates power on and monitoring
• Red ashing and audio pulsing indicates an alarm condition
• Yellow indicates an error in the wireless communication or
in the probe circuit
• Audio chirp warns of low batteries in the outdoor transmitter
See FIG 7 and section 4.1.
2.1 HIGH Liquid Level Alarm
HIGH LEVEL alarm condition occurs when the liquid level rises
to partially cover the pins on the bottom of the probe. An example
of rising water causing an alarm condition is a septic tank.
Page 4 Model 110 Operating Manual
Sentry Liquid Level Alarm
2.2 LOW Liquid Level Alarm
LOW LEVEL alarm condition occurs when the liquid level falls
below the middle of the pins of the probe. An example of falling
water level causing an alarm condition is a cistern that requires
lling.
2.3 Optional Relay Output
The relay output may be utilized to switch on remote alarms,input
to security systems, auto dialers, WiFi transmitters or control
applications. See FIG 5 and FIG 6. Set the relay operation to
Normally Open or Normally Closed shown in FIG 6
3. INSTALLATION
3.1 Mount Indoor Alarm Display
Mount the Sentry indoor alarm display at a convenient viewing
location. Select an eye level location that is frequented, near a
120VAC receptacle. Power to the receptacle should be supplied
from a circuit separate from any pump that is being monitored
by this alarm. Install two supplied screws, 3” apart vertically and
projecting ¼” from the wall, to mount the display. Install the AC
adapter and plug into the alarm display. The LED will be steady
yellow with a continuous audio (after 9 minutes), indicating no
wireless communication. The supplied labels may be used to
identify the indoor alarm display’s function, ie HIGH LEVEL in the
SUMP. Radio transmission is improved by mounting away from
sheetmetalorelectricalwiring.Clearlineofsightisthebestsituation.
3.1.1 Installer Code and/or Radio Frequency
If an installation requires multiple alarms, or if interference
with other radio devices occurs, change the installer
code and / or the frequency program. See section 4.3.
3.2 Mount the Outdoor Transmitter
Mount the Sentry outdoor transmitter near the water source to
be monitored. Fasten the weatherproof NEMA 6P enclosure to
a post or a riser pipe above grade using screws supplied. Radio
transmission is improved by mounting the transmitter higher o
Model 110 Operating Manual
Sentry Liquid Level Alarm
Page 5
grade. For access to disconnect and remove the probe wire see
4.2
3.2.1 Setting HIGH or LOW level function
The jumper position inside the outdoor transmitter
determines the HIGH LEVEL or LOW LEVEL function
to suit your application. See FIG 3. Using needle nosed
pliers, install the jumper, shorting the two terminals for a
HIGH LEVEL function. For a LOW LEVEL function the
jumper is installed on one terminal.
3.2.2 Setting up Installer code or Radio Frequency
If an installation requires multiple alarms, or if interference
with other radio devices occurs, change the installer
code and / or the frequency program. See section 4.3.
3.2.3 Install Batteries
Install the four AA cell batteries supplied.
3.3 Suspend the Probe
Suspend the probe at the depth the alarm is required. The
probe’s alarm point occurs when the pins are immersed in 3/8”
depth of water
3.4 Test the alarm
3.4.1 HIGH Alarm
For a HIGH ALARM the LED will be green and on
steady with the probe out of the liquid. When the probe
is lowered into the liquid, the LED will turn ashing red
and the audible alarm will pulse. Silence the audible
Page 6 Model 110 Operating Manual
Sentry Liquid Level Alarm
alarm. Raise the probe out of the liquid to stop the red
LED ashing and to reset the audible alarm. Repeat this
sequence to prove operation. For any other conditions
see the State Table in section 4.1.
3.4.2 LOW Alarm
For a LOW ALARM the LED should be green and on
steady with the probe in the liquid. When the probe is
raised above the water, the LED will turn ashing red
and the audible alarm will pulse. Silence the audible
alarm. When the probe is lowered into the liquid the LED
will turn steady green indicating alarm is monitoring.
Repeat this sequence to prove the operation. For any
other conditions see the State Table in section 4.1.
Model 110 Operating Manual
Sentry Liquid Level Alarm
Page 7
FIG 1
Indoor Alarm Display Interior
Page 8 Model 110 Operating Manual
Sentry Liquid Level Alarm
FIG 2
Outdoor Transmitter Enclosure Cover Interior
FIG 3
Outdoor Transmitter Enclosure Interior Close-up
Model 110 Operating Manual
Sentry Liquid Level Alarm
Page 9
FIG 5
Optional Relay Output
FIG 4
Outdoor Transmitter Batteries Installed
Page 10 Model 110 Operating Manual
Sentry Liquid Level Alarm
FIG 6
Indoor Alarm Display
Setting relay to Normally Open or Normally Closed
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