Heinrichs Messtechnik GmbH
Operating Manual K09
Page 11 of 28
7.1.3
Requirements for installation dust environments
a) In certain circumstances, the non-metallic parts of the sensor may generate an ignition-capable
level of electrostatic charge. Therefore, the user/installer shall implement precautions to prevent
the build-up of electrostatic charge, e.g. locate the equipment where a charge-generating
mechanism (such as wind-blown dust) is unlikely to be present.
b) Clean the flowmeter regularly with a damp cloth,
c) Dust deposits with a thickness of more than
5 mm
are to be avoided.
d)
The flowmeter is to be electrostatically earthed. Electrostatic charging must be avoided.
7.1.4
Mounting and commissioning
When installing and commissioning the flowmeter, the following points must be observed:
a) The variable-area flow meter must be installed perpendicularly (bottom-up direction of flow).
b) Take special care to install glass-tube devices free from strain.
c) The size of the product line to be connected must be identical to the size of the device
connection.
d) All instruments are shipped with the valve installed at the inlet. By flipping the glass tube in its
fitting and then the instrument, the valve also can be positioned at the outlet.
e) V / N: for the measurement of gas, the "valve at the top" version for a constant inlet pressure
should be used and the "valve at the bottom" version for a constant counter pressure. For liquids,
the position of the valve has no impact on the function of the meter.
f) Open the upstream and downstream shut-off valves of the flowmeter slowly.
g) When measuring liquids, vent the pipes carefully.
h) When measuring gases, increase pressure slowly.
i) Avoid float impact (e.g. caused by solenoid valves), impacts may damage the measuring section
or/and float.
7.2
Ambient conditions
7.2.1
Ambient temperature ranges
without limit switch
-20 °C to +100 °C
with limit switch
-20 °C to +70 °C
Risk of breakage due to frost
7.2.2
Storage temperature
-20 °C to +100 °C
7.2.3
Climatic category
Weather-protected and/or unheated locations,
-
Class C according to IEC 654 Part 1
7.2.4
Degree of protection
IP65 (EN60529)
7.2.5
Shock resistance/vibration resistance
The meter should be protected against shocks and vibrations, which could cause damage to the glass tube.
