metso automation kajaaniMCAi, Инструкция по установке, эксплуатации и обслуживанию

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kajaaniMCA i – Installation, Operating & Service
- 3.1 -
W4610201 V2.5 EN
3. Installation
NOTE: Before installing the process coupling / sensor,
make sure that the process pipeline is not pressurized
and installation will be safe!
3.A. General Principles
The sensor type is selected according to the diameter of
the process pipeline at the installation point.
The flow-through models are FT 100/4", FT 150/6",
FT 200/8", FT 250/10" and FT 300/12". The fork-type
sensors MCAi-F and MCAi-FS can be installed to
pipelines with a diameter of 250 mm / 10" or larger.
When choosing the installation point, pay attention
to the following:
-
The MCAi-F or MCAi-FS should not be installed in
locations where the pulp may contain pieces of
string or other such objects that may get entangled
around the sensor body.
- Never install the sensor on the suction side of a
pump, or to a tower.
- There should be a long enough straight, free pipe
section before and after any changes in the pipe
profile: 4 times pipe diameter before the sensor, and
2 times pipe diameter after the sensor.
- No other devices must be inserted into the process
pipe in the installation point of an MCAi -F or
MCAi-FS sensor, nor 1m before it.
- Choose the installation point so that the sensor can
be inserted into the process coupling without dam-
aging the antennas (Fig. 3.1) – about 60cm (2 ft) of
free space is needed for installation!
- Also make sure that the Display Unit can be installed
– the length of the sensor cable is 10m (33 ft).
- Do not install the sensor too far from a pump – max.
distance between pump and sensor is 12 m (39 ft).
Also pay attention to the following specifications:
-
process temperature 0–100°C (32–212°F);
- conductivity in accordance with the sensor specifi-
cations (see App. 1 of this manual);
- process pressure at least 1.5 bar (21.8 psi) to elimi-
nate air bubbles;
- pressure resistance of the sensor: MCAi FT 16 bar
(232 psi), MCAi F 25 bar (363 psi).
The measured consistency is usually compared to
laboratory analyses. It is therefore important to use a
good sampler (e.g. NOVE) and install it in accordance
with the MCAi installation instructions.
3.B. MCA
i -F /-FS
The fork-type sensors MCAi -F and MCAi-FS are
installed to the process through a process coupling
welded to the pipeline. The sensor antennas must be
directed against the pulp flow (Fig. 3.1). A sticker label
on the sensor indicates the direction of flow. The
process coupling must be installed in a horizontal
position, to prevent dried pulp or any foreign objects in
the process from accumulating there. This also prevents
the accumulation of air. The position of the process
coupling can be checked from the two notches on it:
when installed, the notches must be parallel to the pipe
direction, the smaller notch against the flow. A sticker
label on the process coupling indicates the direction of
flow. Installation drawing for the coupling is shown in
App. 5.
Install the sensor to the process coupling so that the
markers on the sensor body and coupling are aligned.
The inner antenna will then be at the center of the
smaller notch on the coupling.
NOTE: The sensor is fastened in position with a mount-
ing clamp. The sensors are ceramic – be careful not to
damage them!
Fig. 3.1. Installation of MCAi-F sensor (seen from above).
2 9 0 m m
( 1 1 1 3 / 3 2 " )
2 7 2 m m
( 1 0 2 3 / 3 2 " )
2 7 0 m m
( 1 0 5 / 8 " )
m i n . 6 0 0 m m ( 2 4 " )
1 6 1 m m
( 6 1 1 / 3 2 " )
NOTE: The MCAi-F /-FS sensors cannot be used for
measuring unscreened pulps!
NOTE: Make sure that
the markings on coupling
and sensor are aligned!