50-604 Kotron Model 804 Sentinel II RF Level Transmitter
2
1.3
Connecting Cable
Remote mount connecting cable should be shielded,
twisted pair, 22-gauge stranded conductors and may be
ordered as Magnetrol part number 009-7146-001. Cable
length in feet must be specified at time of order; 2500 feet
(760 m) maximum; 800 feet (240 m) maximum for intrin-
sically safe models.
2.0
Installation
Caution:
Carefully read this entire section prior to installation.
2.1
Installation Location
Kotron Sentinel II Transmitters should be placed in a loca-
tion which allows easy access for service, calibration, and
monitoring. Electronics should not be exposed to ambient
temperatures below -40° F (-40° C) nor above +160° F
(+70° C). Special precaution should be taken to prevent
exposure to corrosive atmosphere, excessive vibration,
shock, or physical damage.
It is common practice to use the metal tank wall as the
ground reference. When doing this, it is required that the
probe housing make a good electrical connection to the
tank wall. If there is any doubt about this connection
(rust or using PTFE thread tape, gaskets, or paint may
impede this connection), then a separate strap should be
installed between the probe housing and the tank.
Sensing probes should be located close to the tank wall for
greatest sensitivity in non-conductive media. Isolate probes
from severe motion in the tank because surface turbulence
may cause signal deviation.
Caution:
This unit contains CMOS electronics that could be
damaged by static electricity. Do not touch any semi-
conductor devices unless you are properly grounded.
Metal-Walled Tanks
On water-based liquids, a problem should not be encoun-
tered with sensitivity or linearity. With non-conductive,
low dielectric media, sensitivity can be enhanced by locat-
ing the probe close to and parallel with the tank wall. If
this is not practical, a concentric ground tube surrounding
the probe (a stilling well) may be a solution.
