ABB Nitrate 8236, Инструкция по эксплуатации

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3
2.1 Accessories
1 x reagent bottle 1 x nitrate refurbishing kit
4 x calibration bottles 1 x double junction
1 x nitrate inner electrode reference electrode
1 x spares kit
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.
2.4 Sampling Requirement
In addition to being as close as possible to the monitor, the
sampling point must provide a thoroughly mixed representative
sample. The sample must also conform to the following
conditions:
a) Sample flow rates must be between 5 ml min –1 and
1250 ml min –1 .
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 –1 and the size must not
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 (
1 /
4
") hose adaptor is provided for the
sample inlet and a 9 mm (
3
/
8
") hose connection for the 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.
2 INSTALLATION
Fig. 2.1 Overall Dimensions and Mounting Details
Junction
Box
60 Top of Case
30
Sample Inlet
& Drain
Tubes
110mm minimum clearance
required for access to locks
Fixing Centres
Moulded Case
Shown in
Open Position
780
Fixing
Centres
278
482
220
Cable
Entry
Point
188
890
Open
Position
95

Max.
angle of
opening
542
235
550
Closed
Position
8mm Keyhole
Slot
8mm Fixing
Holes
Top View
Edge of
Case
All dimensions in mm