Emerson Rosemount 248 Quick Start Manual page 22

Quick Start Guide
Specific Conditions of Safe Use (X):
1. See certificate for ambient temperature range.
2. The non-metallic label may store an electrostatic charge and become
a source of ignition in Group III environments.
3. Guard the LCD display cover against impact energies greater than
four joules.
4. Flameproof joints are not intended for repair.
5. A suitable certified Ex d or Ex tb enclosure is required to be connected
to temperature probes with Enclosure option "N".
6. Care shall be taken by the end user to ensure that the external
surface temperature on the equipment and the neck of DIN Style
Sensor probe does not exceed 266 °F (130 °C).
7. Non-standard paint options may cause risk of electrostatic discharge.
Avoid installations that cause electrostatic build-up on painted
surfaces and only clean the painted surfaces with a damp cloth. If
paint is ordered through a special option code, contact the
manufacturer for more information.
7.7.2 I7 IECEx Intrinsic Safety
Certificate IECEx BAS 18.0062X
Standards IEC 60079-0:2017, IEC 60079-11:2011
Markings
Special Condition for Safe Use (X):
The equipment, if supplied without an enclosure, must be installed in an
enclosure which affords it a degree of protection of at least IP20. Non-
metallic enclosures must have a surface resistance of less than 1G Ω; light
alloy or zirconium enclosures must be protected from impact and friction if
located in a Zone 0 environment.
7.7.3 N7 IECEx Zone 2 - with enclosure
Certificate IECEx BAS 18.0063X
Standards IEC 60079-0:2017, IEC 60079-15:2010
Markings
22
Ex ia IIC T5/T6 Ga, T5(-60 °C ≤ T
+60 °C);
See Table 7-3 for entity parameters.
Ex nA IIC T5/T6 Gc; T5(-60 °C ≤ T
+60 °C)
≤ +80 °C), T6(-60 °C ≤ T
a
≤ +80 °C), T6(-60 °C ≤ T
a
February 2021
≤
a
≤
a