Sintrol S303 - Electrical Installation and Wiring; 7.1 Grounding and Power Supply

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7 Electrical Installation and Wiring
 Pay attention when choosing the cable. It must meet and be installed according to all locally
applicable codes, and must be suitable for the environment it is going to be installed in.
 Always use a shielded cable when possible. Make sure to connect the shield to a protective
earth potential at a single location.
 Use a minimum of 0,3 mm
2
or AWG 22 conductor size.
 When connecting the cabling make sure to leave enough slack to allow for the device to be
removed from the process for cleaning without disconnecting the cables form the dust
monitor.
Risk of electric shock!
A faulty electrical installation, excessive line voltage, or incorrect
operation may result in an electric shock.
 Always turn off and unplug the S303 or S304 when you are not using it, when you intend to clean it,
or in the event of a malfunction.
 Only connect the S303 or S304 if the line voltage of the socket corresponds to the data on the rating
plate.
 Stand on an insulating pad and make it a habit to only use one hand when checking components.
 Always work with another person in case an emergency should occur.
 Disconnect power before checking the S303 or S304 or performing maintenance.
 Make sure all equipment is properly grounded.
 Always wear safety glasses when working on the power supply.
 Read and understand User Manual before installation.
7.1 Grounding and usage of grounded power supply
Risk of injury!
If the S303 or S304 is not properly grounded, it may show false results, in
the worst case resulting in severe health impacts to workers and/or a
failure of the explosion prevention system.
 Connect the external grounding, located between the cable glands to a stable local ground
potential.
 The recommended grounding is where the S303 or S304 external grounding terminal is connected
to a nearby grounding strip or the properly grounded ductwork.
 Make also sure that the power supply used to power the S303 or S304 is a Class 2 or equivalent
power supply.
Signs of improper grounding are:
 Base values of over 3000 IEU (see Graph at DustTool) when the process is not running
 The S303, S304 should show a clear reaction when touching the probe
 The S303, S304 should show no reaction when touching the enclosure
Note that sub-par quality power sources might also induce such effects.