Endress+Hauser Oxymax COS22 Kurzanleitung Seite 20

Basic safety instructions
• The certified oxygen sensor Oxymax COS22D-BA***** may only be connected to certified,
intrinsically safe, digital sensor circuits of the transmitter Liquiline M CM42-*E/F/
G********* in conjunction with the measuring cable CYK10-G**1. 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 (e.g. a metallic
assembly) takes place via the O-ring.
• You have to connect the assembly or the installation 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 marked by a red-
orange ring on 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.
NEPSI Ex ia IIC T3/T4/T6 Ga
The Memosens inductive sensor cable connection system, consisting of:
• Oxygen sensor Oxymax COS22D-NA****3 and
• measuring cable CYK10-G*1
is approved for use in explosive atmospheres in accordance with the National supervision and
inspection centre for Explosion protection and Safety of Instrumentation (NEPSI) in China.
The certified oxygen sensor Oxymax COS22D-NA****3 may only be connected to the
following certified, intrinsically safe, digital sensor circuits in conjunction with the measuring
cable CYK10-G**1, or a Memosens cable with an identical structure both in terms of
hardware and function:
– Liquiline CM42-OJ*
– Alternatively to an approved, intrinsically safe Memosens sensor output that supplies the
following values at the very maximum:
Parameter set 1
U = 5.1 V
0
I = 130 mA
0
P = 166 mW (linear output characteristic)
0
C = 15 µF
i
L = 95 µH
i
• 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 (e.g. a metallic
assembly) takes place via the O-ring.
• You have to connect the assembly or the installation to ground according to the Ex
guidelines.
20
Parameter set 2
U = 5.04 V
0
I = 80 mA
0
P = 112 mW (trapezoidal output characteristic)
0
C = 14.1 µF
i
L = 237.2 µH
i
Oxymax COS22/22D