Endress+Hauser Memosens COS81D, Руководство по эксплуатации, Страница: 6 / 48

Basic safety instructions Memosens COS81D
6 Hauser
2.4 Operational safety
Before commissioning the entire measuring point:
1. Verify that all connections are correct.
2. Ensure that electrical cables and hose connections are undamaged.
3. Do not operate damaged products, and protect them against unintentional operation.
4. Label damaged products as defective.
During operation:
‣
If faults cannot be rectified:
products must be taken out of service and protected against unintentional operation.
2.5 Product safety
2.5.1 State of the art
The product is designed to meet state-of-the-art safety requirements, has been tested, and
left the factory in a condition in which it is safe to operate. The relevant regulations and
international standards have been observed.
2.5.2 Electrical equipment in hazardous areas
ATEX II 1G / IECEx Ex ia IIC T3/T4/T6 Ga
The Memosens inductive sensor cable connection system, consisting of:
• oxygen sensor Oxymax COS81D and
• measuring cable CYK10/CYK20
• A maximum ambient temperature of 90 °C (194 °F) must not be exceeded at the sensor
head.
• The certified Oxymax COS81D oxygen sensor, in conjunction with the CYK10 measuring
cable, may be connected only to certified, intrinsically safe, digital sensor circuits of the
Liquiline M CM42 transmitter. The electrical connection must be made according to the
wiring diagram.
• Oxygen sensors for use in the Ex area have a special conductive O-ring. The electrical
connection of the metallic sensor shaft to the conductive mounting location (such as a
metallic assembly) is via the O-ring.
• You must connect the assembly or the installation location to ground according to the Ex
guidelines.
• The sensors must not be operated under electrostatically critical process conditions.
Avoid strong steam or dust currents that act directly on the connection system.
• Hazardous area versions of digital sensors with Memosens technology are indicated by a
red-orange ring in the plug-in head.
• The maximum permitted cable length between the sensor and transmitter is 100 m
(330 ft).
• Full compliance with regulations for electrical systems in hazardous locations (EN/IEC
60079-14) is mandatory when using the devices and sensors.
CSA C/ US: Class I, Zone 0 AEx ia IIC T6…T4 Ga and IS Class I, Division 1, Groups A, B,
C and D T6…T4
Pay attention to the XA and control drawing for the transmitter used.
The relevant XA with the control drawing is available in the Download Area of the
product page under www.endress.com .