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2 INSTALLATION
2.1 Accessories
2 x reagent bottles
4 x calibration bottles
2.2 Location
The monitor should be installed in a clean, dry, well ventilated
and vibration-free location giving easy access, and where
short sample lines can be used. Rooms containing corrosive
gases or vapours (e.g., chlorination equipment or chlorine gas
cylinders) should be avoided. It is also advisable to have
adjacent drains near ground level, so that the waste outlet
from the monitor can be as short as possible, together with
maximum fall. Power supplies should also be adjacent.
Ambient temperature: within the range 5 to 40°C.
2.3 Mounting – Fig. 2.1
The monitor has a moulded plastic case, mounted onto a flat
metal panel. To provide access, the case is hinged on the left
hand side and has two lockable catches on the right hand to
hold the case in position in normal operation.
One keyhole slot is provided at the top of the flat panel to
provide easy mounting on a wall or framework. Two further
fixing holes are provided at the bottom of the flat panel. All
holes are designed to take 8 mm bolts or studs.
Mains and signal cables are connected through cable glands
in the User Junction Box on the right hand side with the
exception of the optional serial interface which connects
directly into the Microprocessor Unit. Sample and drain
pipework are brought in through the bottom of the case.
Moulded Case
Shown in
278
Open Position
Sample Inlet
& Drain
Tubes
30
Edge of
482
Case
Fixing Centres
1 x ammonia probe kit
1 x spares kit
8mm Keyhole
Slot
60 Top of Case
Junction
Box
780
Fixing
Centres
8mm Fixing
Holes
110mm minimum clearance
required for access to locks
Fig. 2.1 Overall Dimensions and Mounting Details
2.4 Sampling Requirement
In addition to being as close as possible to the monitor, the
sampling
point
must
representative sample. The sample must also conform to the
following conditions:
a) Sample flow rates must be between 5 ml min
–1
1250 ml min
.
b) Sample temperature should be within 20 °C of the ambient
temperature and within the range 0 to 40°C.
c) Particles must be less than 10 mg l
exceed 60 μm. Above these levels it is essential that the
filter supplied is fitted in both the sample and emergency
inlets.
2.5 Sample Connections – Fig. 2.2 (overpage)
The inlet and outlet pipe connections are both located at the
bottom of the case. A 6 mm (
the sample inlet and a 9 mm (
drains. It is recommended that the pipes used should be of
inert material, e.g., silicone rubber or p.v.c. The inlet pipe must
incorporate a shut-off valve at its upstream end, while the drain
outlet pipes should be short, venting to atmosphere as soon as
possible.
188
Cable
Entry
Point
890
220
provide
a
thoroughly
mixed
–1
–1
and the size must not
1
/
") hose adaptor is provided for
4
3
/
") hose connection for the
8
235
95° Max.
angle of
Closed
542
Position
opening
550
Top View
All dimensions in mm
and
3
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