SI Analytics ATEX 100a Mode D'emploi page 16

Area of use:
The process sensors are used for the measurement of the pH value, redox potentials and/or
the temperature of process media.
Electrical connection details:
Sensor circuits according to the EEx ia IIC intrinsic safety type of protection, maximum value
of the total:
For sensors with a temperature probe
Temperature class
T6
T4
T3
For sensors without a temperature probe
Temperature class
T6
The magnitudes of the intrinsic inductivity and capacity are negligible.
Under aspects of safety engineering, all current circuits including the shielding and earthing
conductor are to be considered as galvanically interlinked, too.
In addition, the following special requirements are imposed on the set-up and
operation:
Explosion protection within atmospheric conditions is established for a pressure from
•
absolute 80 kPa to 110 kPa and an ambient temperature from -20° C to 60° C. In deviation
thereof, sensors with a temperature probe are certified for an upper limit of 40° C.
When used outside atmospheric conditions, the proof of explosion protection has to be
•
provided by the operator within the context of the explosion protection document.
The reliability of the item of equipment item under concern is subject to the standard
•
manufacturer's information provided for that particular item.
The process sensors are built in with a mechanical protection, for instance by way of
•
using suitable fittings or applying an appropriate physical arrangement.
A highly reliable equipotential bonding is to be established all along the intrinsically safe
•
electric circuit.
The treatment of the shielding conductor ought to be found in the operating instructions of
•
the related item of equipment being used.
The shielding conductor is to be incorporated in any measures which may have to be
•
taken against overvoltages (lightning protection).
Both the manufacturer and the operator exclude in their own responsibility any risks of
•
electro- and thermo-chemical activity in the case of an encounter of the external medium
and the electrolyte/materials contained inside the sensor in case the glass body should
be destroyed.
Installation
Please check your chemical sensor for possible damage caused during transportation prior
to its first use. In case you detect any damage, please return the sensor to us for inspection
immediately.
For further information, please refer to the process electrodes catalogues from SI Analytics
as well as to the operating instructions of your measurement transducer.
16
Ambient temperature [° C] U
≤ 40
≤ 40
≤ 40
Ambient temperature [° C]
≤ 60
[mA] I [mA] P a
o o
≤ 12 ≤ 30 ≤ 50
≤ 15 ≤ 80 ≤ 110
≤ 18 ≤ 170 ≤ 200
U [mA] I [mA] P a
o o
≤ 18 ≤ 170 ≤ 200
[mA]
o
[mA]
o