50-613 Kotron
®
Series 82 CE RF Level Transmitter
14
2.0
Reference Information
This section presents an overview of the operation of the
KOTRON Series 82 CE RF Level Transmitter, information
on troubleshooting common problems, intrinsic safety
information, physical, functional and performance
specifications, listings of agency approvals, and a list
of recommended parts.
2.1
Description
KOTRON Series 82 CE Level Transmitters are designed to
measure liquids, slurries, dry-bulk, or liquid-liquid inter-
faces. The transmitter may be mounted integrally with the
probe or can be remote mounted up to 40 feet (12 meters)
away. This unit is available as a four-wire transmitter with
either 120 VAC or 240 VAC input power, or as a two-wire
transmitter with a supply voltage between 16 VDC and
40 VDC. Available options include an analog meter. This
transmitter can be used with any KOTRON R.F.
Capacitance probe.
2.2
Theory of Operation
The KOTRON Series 82 CE Level Transmitter monitors
the level by determining the capacitance of the media. The
probe and a ground (usually the metal tank wall), form
a capacitor. As the level rises and falls in the tank, the
amount of capacitance developed between the probe
and the ground changes. This change of capacitance is
converted to a proportional 4–20 mA signal.
2.3
Troubleshooting
The output current can be measured either by inserting
a milliammeter into the loop, or by measuring across
TP1 (+) and TP2 (–). The intensity of the LED between
the test points is a relative indicator of current flow.
Caution:
When a probe is used in an abrasive medium, inspect the
probe at least annually for visible surface wear. In case any
wear is found, replace the probe or consult the factory.
2.3.1 Installation
LED does not light after wiring is completed and power
turned on.
a. Wires reversed at supply or transmitter.
b. Wires broken or not connected.
