MIP LM 3086 SE/EPA3 manual, rev2
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16.10.2018
Page 17 / 105
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2.1.1
RECEIVER UNIT CONTROLS
There are no electrical controls in the receiver unit.
2.1.2
CONTROLLER UNIT DISPLAYS AND CONTROLS
The D/A converter inside the controller can be adjusted to accommodate signal loss due to wire lengths and
impedance of PLC units, or DCS devices. There are four potentiometers inside the controller, none with
labels. They sit on the main board where the E-Prom fits, all lined up, with the adjustment screw on top. The
screws are painted shut since they are calibrated at the factory. Since it is impossible to set each pot to the
customer’s system they may need to be adju
sted if the LCD display does not agree with the data collection
device.
See the appendices for a complete procedure on how to adjust the analogue outputs. On the controller,
there are three features of the controller. The first is the two-line alphanumeric display, which displays the
opacity readings, averages, text for mode selections, and fault descriptions. The second component is the
push buttons. Each push button, and some combinations of the push buttons activate certain menus and
functions. The details of each push button and their functions will be described in detail later. Thirdly, there
are a series of trouble lights, the functions of which are explained by either the printing on the controller
plate, or their physical association with certain push buttons.
2.1.3
AUTOMATIC SHUTTER GATE
The automatic shutter gate closes upon loss of purge air (< 1 mig), therefore protecting all internal
components of the transmitter enclosure from flue gases. The shutter gate will also close if the door is
opened. If the shutter does not close when the door is opened, check the position of the shutter gate
selector. Severe damage may occur when exposing the monitor to flue gases. The shutter gate can be kept
open manually for inspection and service by moving the shutter ga
te selector to the “open” position. Do not
keep the shutter in the manually open position without the purge air diverted to the stack when the monitor
is exposed to flue gas. If the shutter closes due to a loss of purge air two things will happen. The controller
will receive a purge fail alarm, and the opacity reading will spike to 99.9 %. The transmitter is included with a
½ inch hole to receive A fitting for customer supplied purge air. If the blower option is purchased, a bulkhead
will install at the factory
2.2
MONITOR MODES OF OPERATION
Modes are presented in the following order:
1.
The diagnostic and operational modes are presented in the order in which they appear.
2.
The manual modes, which are likely to be operated occasionally.
3.
The set-up modes, which are us
ed to configure the system to meet the customer’s needs.
4.
The service modes in order of occurrence for use by specialized personnel.
For each mode, all the entry and exit conditions as well as its influence on the monitors operation are
explained. Most mode operations are explained by the display.