Heinrichs Messtechnik GmbH
EX-Supplementary Operating Manual
HPC Mass Flow Meter
Page 13 of 20
5
Installation and commissioning
5.1
Mounting
The mounting instructions for the standard sensor also apply to the explosion-proof sensor. This handbook
complements that of the standard sensor.
The sensor may only be separately installed and connected with a special sensor cable, whereby the
maximum CL and LL of the connection cable must be observed.
Refer to the standard operating manual for the connection scheme of the sensor
5.2
General conditions for safe operation
a)
If the conditions described in this document are not adhered to or if there is any inappropriate
interference with the equipment, all the manufactures warranties expire.
b)
Conditions described in this manual, as well as the permitted operating conditions which have been
defined for the sensor and which are stated on the rating plates must be adhered to.
c)
Appropriate measures shall be met to prevent any unintentional or inadmissible damage to the
device.
d)
The operator shall ensure that the equipment is only installed in areas which comply with the
approved types of protection and environments.
e)
All connected electrical equipment must be suitable for its intended use.
f)
The operator shall ensure protection against lightning according to local regulations.
g)
The sensor is maintenance-free. Substitution of components may impair intrinsic safety
5.3
Requirements for installation in all environments
a)
The installation of the intrinsically safe circuits requires a control drawing (system description), to be
issued by the operator/erector.
b)
The equipment is only to be installed and connected in a de-energized state.
c)
The sensor can be installed in zone 0 as well as zone 20 or 21. The intrinsically safe circuits are to be
installed (from specialists) according to applicable regulations.
d)
Equipotential bonding between the sensor and transmitter is essential to guarantee conformity of the
intrinsically safe circuits.
e)
It is to be insured that the intrinsically safe circuits of the sensor cable are not laid together with non-
intrinsically safe circuits.
f)
When using a connection cable other than the manufactures specified cable, the intrinsic safety of the
cable is to be validated using the cables nominal parameters.
Refer also to section 4.3.3.2 “Cable Parameters” on page 10
g)
If the sensor is used at an ambient temperature below -20 °C, suitable cables are to be used.
h)
The operational wall thickness of the stainless steel flow tubes are < 1 mm. Therefore, in cases where
the sensor is operated in zone 1 atmospheres and where zone 0 may be present in tubes, the
