ABB KM26 Operating Instruction page 17

KM26 | M AG N ET I C LE V EL G AUG E | O I/KM 2 6 -EN RE V I
. . . 3 Mounting
mounting tabs of the transmitter match up to the
chamber. Also, place a mark on the insulation blanket that
corresponds to the mounting tabs of any support bracket
included with the transmitter.
8
set the transmitter down.
9
using a razor, cut slots in the insulation blanket
and 1 in. long (19 mm x 25 mm) at each mark.
10 loosen the insulation blanket from the scale assembly
opposite the location of the transmitter and slightly
loosen all but the uppermost worm gear clamps which
attach the scale assembly to the MLG.
11 open the worm gear clamps included with the
magnetostrictive transmitter and slide one clamp beneath
the scale assembly at each marked location on the MLG
insulation blanket. Tighten the clamps slightly to hold
them in place.
Note
For transmitters with a measuring length longer than 7 ft.
(2.1 m), use a tape measure to determine the location of
mounting tabs on the transmitter and mark the MLG
insulation blanket accordingly.
12 Realign the zero mark of the transmitter with the
corresponding zero on the MLG.
13 Starting with the highest transmitter mounting clamp,
loosen each transmitter clamp, slide the clamp over or
through the mounting tab of the transmitter, and tighten
the clamp.
14 Repeat step 13 until all transmitter mounting clamps are
tightened.
15 Tighten all scale mounting clamps being sure to align the
scale vertically on the MLG and reattach the insulation
blanket to the scale assembly.
To confirm the zero of the transmitter, apply power to the
terminal strip of the magnetostrictive transmitter. If the
transmitter reads higher than 'zero', raise the transmitter.
If the transmitter reads lower than 'zero', lower the
transmitter.
16 Attach proper field wiring to the transmitter according to
the instruction manual, included with the transmitter.
17 Open the process to the MLG using the procedure
included in the 'isolation valves' section.
Installation with insulation pad
If the transmitter includes an insulation pad: follow steps 1-17
in the 'installation without insulation blanket or pad' section.
Before mounting the transmitter:
1
Align one end of the insulation pad with the end of the
transmitter sensor tube.
2 Mark the insulation pad at the location of each transmitter
mounting tab.
3
Using a razor, cut slots in the insulation pad
1 in. long (19mm x 25mm) which correspond to the marks
from the mounting tabs.
4 Mount the insulation pad between the transmitter sensor
tube and the MLG.
5
The transmitter mounting tabs will hold the insulation
pad in place.
Electric heat tracing
in. wide
¾
The optional electric heat tracing can be used for freeze
protection or to keep a product in the chamber at a constant
heated temperature. The electrical heat tracing is available as
a factory installed option.
Three models of heat tracing are available. ET1, ET2, ET3.
These designs incorporate a thermostat to regulate the
temperature via voltage to the heat trace cable. Customer
electrical power is required for installation in the field. The
ET...model of the electrical heat tracing is needed to
determine what voltage is required.
The second number of the ET model code corresponds to the
voltage required for the heat trace system.
Example: ETXX
1. 110VAC, 2. 220VAC, 3. 277VAC, 4. 440VAC
Example: ET1 = 110VAC, ET2 = 220VAC
All wiring should adhere to local area electrical standards and
procedures.
Figure 19 - ET1 wiring
in. wide and
¾
Figure 20 - ET2 and ET3 wiring
17