Table of Contents
Advertisement
Sentry
LIQUID LEVEL GAUGE MODEL 200 or 200C
OWNER MANUAL
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. The low direct current (DC) voltages and
transformer isolation of this instrument pose no danger when
handling or opening the enclosures or connecting the sensor.
Best practice, however, is to disconnect power when working
on this equipment.
2. APPLICATIONS
Sentry
The
liquid level gauge continuously measures the
water level in cisterns, holding tanks, pump chambers, sumps,
treatment plants, irrigation channels and truck tanks. The
indoor level display indicates the depth of water in feet, meters
or percent. HIGH and LOW level alarm points and an audible
alarm with silence and auto reset can be used to warn of an
alarm condition. A yellow LED indicates when the silence is
activated.
Four relay outputs on the model 200C can be configured to
operate pumps, aerators, remote alarms, security system, auto
dialer or other control applications. Four green LEDs on the
display indicate the relay status.
The sensor rests, vertically, on the bottom of the tank and is
tethered at the top. Sensor cables are terminated in a NEMA
4X junction box, to which customer-supplied cable is
terminated.
This cable then terminates at the display. (Fig
3.3.1)
3. INSTALLATION
Sentry
3.1. Mount the
a convenient viewing height within 6 feet of a 110VAC
receptacle. Power to the receptacle should be
supplied from a circuit separate from any pump or
equipment that is being monitored or controlled by this
gauge. The supplied screws can be used to mount the
level display in a dry location, at
PAGE 3 OF 12
REV 1.7
SEPT08
Advertisement
Table of Contents
