Heinrichs Messtechnik GmbH
TM/TMU/TM-SH Supplement Manual
For Explosion Flow-meters
Page 13 of 20
4.
Installation and Commissioning
4.1
Mounting
The mounting instructions for the standard sensor also apply to the explosion-proof sensor.
Depending on the approval of the connected transmitter, the sensor may either be:
Directly mounted, mechanically fastened to the transmitter producing a single unit.
or
Separately installed and connected with a special sensor cable, whereby the maximum C
L
and L
L
of the
connection cable must be observed.
Refer to the standard operating manual for the connection scheme of the sensor
4.1.1
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)
For models with
a
junction box enclosure made from Aluminum alloy, ignition sources due to impact
and friction sparks could occur. This shall be considered during installation, the danger of objects falling
onto the sensor shall be excluded.
h)
Combination of the external barriers from the transmitter has not been assessed
. Therefore
each
input wiring circuit to the sensors should be
kept segregated from the other
inputs as per
requirements of the standards.
i)
For exciter coils type EC2 and EC2R the supply signal from the transmitter shall be pulsed with low duty
cycle or non-repetitive.
4.1.2
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)
For ordinary locations installations to be supplied by a Limited Energy Source in accordance with CSA
61010-1-12/UL 61010-1.
c)
The equipment is only to be installed and connected in a de-energized state.
d)
The sensor is to be installed (from specialists) according to applicable regulations.
