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Sentry
LIQUID LEVEL GAUGE MODEL 200 or 200C
OWNER MANUAL
TOP
BOTTOM
GROUND
T B -
SENSOR TERMINAL
3.4. It is good practice to test the operation of the gauge at
this point. Wrapping your hand around the sensor(s)
and moving slowly up will give a reading on the
display at the approximate level of your hand. (The
water in your hand acts as the water that will surround
the sensor when in operation.) Setting the sensor into
a pail of water is another way to test the operation.
The level is displayed in feet, the factory default
setting. This step verifies the integrity of the wiring.
3.5. A single sensor length is a maximum of 8 feet. A top
sensor is used in addition to the bottom sensor for a
total depth of greater than 8 feet up to 16 feet. The top
sensor can be incorporated into the same tube up to
10 feet. After that depth dual sensors are used and a
support leg is used to ensure the top sensor is in
alignment with the bottom sensor. The sensor lengths
may be also be mixed; for example a 12 foot sensor
may
be
made
Lower the sensor(s) into the water using the tether
rope. DO NOT SUSPEND THE SENSOR FROM THE
POWER CABLE. The sensor is internally weighted
and will rest on the bottom of the tank. For dual
sensor applications mount the support leg to the top
sensor per the enclosed instructions. The tether
rope(s) is tied off to hold the sensor vertical.
3.6. (Model 200C) Run the control wiring to the power
relays. Conductor size maximum is 16 gauge,
preferably stranded. 18 gauge wire is recommended.
ANALOG
GROUND
TRANSMIT
RECEIVE
A
-
T R
4
4
3
3
2
RELAY TERMINAL (200C)
FIG 3.6.1
out
of
two
6
foot
RELAY
ONE
2
1
1
sensors.
REV 1.7
SEPT08
PAGE 5 OF 12
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