Ametek Land 4750-PM, Руководство пользователя

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4 - 3 User Guide
Particulate Measurement System 4750-PM
Ambient Light
An important consideration when choosing the location of the sensor is
the effect of excessive ambient sunlight reaching the detector. In order to
eliminate interference from ambient sunlight, the sensor should be mounted
as far from the top of the stack as practicable, taking the location and
guidelines of the isokinetic sampling ports into consideration.
4.3.3 Access to the Sensor (Clearances)
Appropriate health and safety considerations need to be applied due to the
size and weight of the sensor (see Section 2.2).
Maximum Weight Maximum Length Mininum Clearance Required
9.6 kg (21 lb) 354 mm (14 in) 470 mm (approx 1.5 ft)
The above table gives the maximum weight and length of the sensor, and the
minimum unobstructed clearance required in front of the sensor enclosure to
allow unhindered installation, opening, and removal of the sensor.
4.3.4 Power Supply to the Sensor
Ensure the power required for the sensor is made available near the point
of monitoring during the preparation stage. For mains-powered sensors, a
suitable rated and clearly marked mains isolation device (with separate fuse)
must be installed in the power supply wiring. For more information refer to
Section 2.3 Cabling.
When installing, leave sufficient cable to allow the sensor to be removed and
placed on the ground or platform without disconnecting (see also Section
4.3.5 below).
Mains Wiring Safety Rules
Trim back the wire insulation to no more than 8 mm (0.3 in) and ensure
that strands are not left free. Alternatively, use a suitable ferrule. It is
recommended to extend the cable insulation fully through the gland so
individual wires are not damaged and a good seal is formed. Ensure cable
glands are tightened securely, either by hand or using a suitable spanner.
4.3.5 Cable Routing Guidelines
WARNING!
Tripping Hazard. Ensure all cables are routed safely to avoid
tripping or entangling hazards, and to avoid kinks and pinches.
1) Ensure the cable sheath fully penetrates the sensor cable gland.
2) Fit blanking plugs to unused cable glands.
3) Ensure cable entry glands are securely tightened to the cable.
4) Support cables at appropriate intervals.
5) Do NOT route cables where they may be at risk from lightning strike
(e.g. over exposed roofs).
6) Leave sufficient length so the sensor can be removed from the stack/
duct and laid on the ground or platform without disconnecting.