YOKOGAWA ROTAMETER RAMC

7. EXPLOSION PROTECTED TYPE INSTRUMENTS
7- 1
All Rights Reserved. Copyright © 2006, Rota Yokogawa
IM 01R01B02-01E-E 5th edition October 01, 2020 -00
7. Explosion Protected Type Instruments
WARNING
• Only trained personnel may use the instrument in an industrial location.
• The instrument modication or replacement of parts by other than an authorized Representative of
Yokogawa is prohibited and will void the certication.
• Electrostatic charge on painted or other non- metallic surfaces may cause an explosion hazard.
Avoid any actions that cause the generation of electrostatic charge, such as rubbing with a dry
cloth on painted surface of the indicator or on potting of electronic transmitter.
WARNING
The electronic transmitter RAMC---P429 /S1 is an intrinsically safe device.
To ensure intrinsic safety it is not permitted to repair or to modify the electronic transmitter, the display or
the calibration EEPROM.
In the case of high uid temperatures, heated metering tubes or heat radiation by heat tracing, make
sure that the temperature in the indicator housing does not exceed the permissible maximum ambient
temperature of the transmitter (see below chapter 7.1.1).
7.1 Intrinsically Safe ATEX and IECEx certied
electronic transmitter (/KS1, /ES1)
7.1.1 Technical data
The electronic transmitter is an intrinsically safe device. This device is certied for hazardous areas of zone 1
(category 2) and zone 2 (category 3). It is not homologated for zone 0 (category 1). The classications in
brackets are given according to Directive 2014/34/EU (ATEX).
EU-Type Examination Certicate No.: PTB 12 ATEX 2003 X
IECEx certicate No.: IECEx PTB12.0020X
Applicable standards: EN 60079-0: 2018
EN 60079-11: 2012
IEC 60079-0: 2017 edition 7
IEC 60079-11: 2011 edition 6
Identication in accordance with Directive 2014/34/EU (ATEX):
II 2 G
Type of protection: Variant #1: Ex ia IIB/IIC T4 Gb
Variant #2: Ex ia IIB/IIC T6 Gb
Variant #3: Ex ia IIB T6 Gb
Variant #4: Ex ia IIB/IIC T4 Gb
Ambient temperature: Variant #1: -40 °C to +70 °C
Variant #2: -40 °C to +50 °C
Variant #3: -40 °C to +60 °C
Variant #4: -40 °C to +70 °C