36
AQUA M A STE R4
| EL EC T R O M AG N E T I C FLO W M E T ER T R A N SM I T T ER | O I/FE T4 0 0 - EN R E V. D
6 Commissioning
Safety instruction
WARNING – INTEGRAL FLOWMETERS
Risk of burns due to hot measuring media.
The sensor surface temperature may exceed 70 °C
(158 °F), depending on the measuring medium
temperature! Before starting work on the flowmeter,
make sure that it has cooled sufficiently.
If there is a chance that safe operation is no longer possible,
take the flowmeter out of operation and secure it against
unintended startup.
Checks prior to commissioning
The following points must be checked before commissioning
the flowmeter:
• The wiring must have been completed as described in
• The sensor must be cross bonded to up and downstream
pipes correctly.
• The ambient conditions must meet the requirements set
out in the technical data.
• The power supply must meet the requirements printed on
the identification plate.
• The sensor and transmitter must be correctly assigned –
see page 8 for label information.
IMPORTANT (NOTE)
The Flow Settings > Mains Noise Rejection Frequency
(Hz) setting must match the mains frequency in the
country of installation. Refer to
from
page 50.
MID/Anti-tamper seals
For flowmeters ordered with the option for compliance with EU
Measuring Instrument Directive (MID), it is a legal requirement
that, after installation, the flowmeter is sealed to prevent
unauthorized changes to the meter settings and configuration.
Both the sensor and transmitter must be ordered with the MID
option for the flowmeter to be MID compliant
A read-only switch is used to prevent login through any
communication means and modification of any parameters on
the AquaMaster4 – see Figure 59. For MID and OIML systems,
the switch is for write protection for legally relevant
parameters.
For MID and OIML systems this switch must be set to the MID
read-only position and a compliance seal fitted as shown in
Figure 59. Suitable tamper detection seals must be used (such
as the factory-fitted seals, see Figure 59) so that in the event of
unauthorized tampering, it is clearly visible that the fitted legal
metrology seal has been broken.
IMPORTANT (NOTE)
On earlier hardware versions, this switch polarity was
reversed, refer to the fitted label regarding the lock
position
Figure 59
MID/Read-only
switch
MID compliance
seal
Read/Write position
MID sealed
read-only position
Read-only switch and compliance seal (FET41X/43X)
