ABB CoriolisMaster FCM2000, Operating Instruction

Page: 20 / 104

5 Flowmeter Primary: MS2: DN 1.5 to DN 6 [1/16” to 6”]
20 FCM2000 D184B111U02
5 Flowmeter Primary: MS2: DN 1.5 to DN 6 [1/16” to 6”]
5.1 Installation and Maintenance, Flowmeter Primary
The transport protection screws are installed at the factory in order to prevent damage during shipment. The
converter is a sensitive instrument and must therefore be handled with care.
Pressure Reduction Valve
The pressure values are approximations. An exact specification of the absolute value at which a rupture or
leak occurs is not possible. For operating pressures/fluids, which could possibly cause a meter pipe rupture
with resultant personnel injury, property damage, etc. special protective measures for the sensor installation
are recommended (special arrangements, protection covers, pressure relief valves etc.).
The sensor housing incorporates a 1/8“-nipple. When the nipple is removed, a pressure relief valve can be
installed to automatically block the flow to the sensor in the event of a leak. Installation information may be
found in the Section „Installation of a Pressure Relief Valve“.
!
Attention!
The max. operating pressure for meter sizes DN 3 [1/10”] and DN 6 [1/4”] is 50 bar.
For meter size DN 1.5 [1/16”] the max. pressure is 70 bar.
!
Attention!
Before start-up, both transport protection screws must be removed and replaced by the nipples included
with the shipment as shown in the figure. Before removing the transport protection screws observe the fol-
lowing:
Under no circumstances may humidity, liquids or foreign objects enter the flowmeter primary housing be-
cause the measurement accuracy could be adversely affected.
Fig. 11: Transport protection
A
A A
1
2
1
2
1. Transport protection screw
2. Nipple and gasket
Important!
Before removing the nipple from the sensor housing the following must be considered:
Under no circumstances may humidity, liquids or foreign objects enter the flowmeter primary housing be-
cause the measurement accuracy could be adversely affected. This type of problem can be avoided by ob-
serving the following instruction:
1. To acclimate the sensor it should be placed in a dry, clean area until it has reached an ambient temper-
ature of approx. 20 °C.
2. Care should be exercised when removing the nipple and installing the pressure relief valve.
3. Assure that the pressure relief valve is correctly installed and properly tightened, so the gasket is seated
correctly. Whenever it is removed the gaskets should be replaced.