Sensor cmb approvals, Explosion protection, Ce marking – Fluid Components International CMB User Manual
Page 29: Custody transfer operations, Commissioning, Zero point calibration, Startup conditions

3.9
Sensor CMB approvals
3.9.1 Explosion
protection
•
Intrinsically safe sensor circuits
•
BVS 05 ATEX E 145 X
•
II 1/2G EEx ia IIC T6 – T2
•
(Zone 0 permissible in flow tube)
The explosion protection approvals are available on our website
3.9.2 CE
marking
•
Pressure Equipment Directive 97/23/EC
•
Explosion Protection Directive 94/9/EC
3.9.3
Custody transfer operations
The declarations of conformity certifying flowmeters for custody transfer operations
request from the FCI factory.
4. Commissioning
4.1
Zero point calibration
In order to ensure that precise measurements are obtained, zero point calibration is to be realized the
first time the device is put into operation
and before any regular operations are carried out. Zero point
calibration is to be carried out using a fluid.
The zero calibration procedure is as follows:
•
Install the sensor as described in the manufacturer’s instructions.
•
Check to ensure that the sensor is completely filled with fluid and that there are no gas bub-
bles in the flow tubes.
•
Define the process conditions such as pressure, temperature and density.
•
Close a potential shut-off device behind the sensor.
•
Operate the transmitter in accordance with the instructions in Section 13.4.4 Zero point cali-
bration on page 61.
•
Make sure that sufficient time is allowed for the electronics to warm up.
•
Allowing fluid to flow through the sensor during the zero calibration procedure will skew the
zero point and result in false readings.
4.2 Startup
conditions
The device is not subject to specific startup conditions. However, pressure surges should be avoided.
CMB & CT OPERATING MANUAL
Part No 06EN003384 rev. 1.6
Page 29 of 106