Installation Instructions; Use In Areas Exposed To Combustible Dust; Opening And Closing The Terminal Box - ABB SensyMaster FMT230 Commissioning Instruction

16 FMT230, FMT250 THERMAL MASS FLOWMETER | CI/FMT230/250-EN REV. B
... 3 Use in potentially explosive atmospheres in accordance with FM and CSA

Installation instructions

The installation, commissioning, maintenance and repair of
devices in areas with explosion hazard must only be carried out
by appropriately trained personnel.
The operator must strictly observe the applicable national
regulations with regard to installation, function tests, repairs,
and maintenance of electrical devices. (e. g. NEC, CEC).
It is essential that the temperature classes as per the approvals
in 'Temperature data on page 13' are observed.
The information in the installation diagram 3kxf000094G0009
on page 53 must be observed.

Use in areas exposed to combustible dust

When using the device in areas exposed to combustible dusts
(dust ignition), the following points must be observed:
• The maximum surface temperature of the device may not
up-scale 85 °C (185 °F).
• The process temperature of the connected line can up-
scale 85 °C (185 °F).

Opening and closing the terminal box

DANGER
Danger of explosion if the device is operated with the
transmitter housing or terminal box open!
Before opening the transmitter housing or the terminal box,
note the following points:
• A valid fire permit must be present.
• Make sure that there is no explosion hazard.
• Switch off the power supply and wait for t > 20 minutes
before opening.
WARNING
Risk of injury due to live parts!
When the housing is open, contact protection is not provided
and EMC protection is limited.
• Before opening the housing, switch off the power supply.
See also Opening and closing the housing on page 40.
Only original spare parts must be used to seal the housing.
Note
Spare parts can be ordered from ABB Service.
www.abb.com/contacts