Fluid Components International CMU - Manual (Page 34)

3.9 Sensor CMU 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 upon request from the FCI factory.
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 FCI flowmeters for custody transfer operations are available
upon 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 66.
• 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.
Page 34 of 112
CMU & CT OPERATING MANUAL