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The equipment must be installed in a manner that any heating from the process
connection does not exceed the ambient temperature assigned to the equipment.
7.2
Additional EX notes:
1)
Working Voltage (peak value) must be less than 28.8V d.c., or 24V d.c. + 20%.
2)
Sensor must be powered using an IEC / EN 60950-1 compliant power supply, or through a
suitable EX barrier (e.g. MTL5522) which is earthed to the Equipotential Bonding System
and from a power supply with negligible output series inductance.
3)
Any additional interface circuits monitoring the serial outputs or the 4-20mA analogue
outputs must be similarly IEC / EN 60950-1
compliant
or through a similar EX barrier.
4)
The sensor body must be directly screwed into the earthed body of the machine on which
it is used, or earthed pipework and fittings in the lubrication system for such machine.
Insulating bushes or adaptors must not be used
.
Ensure the sensor case is earthed using
the earthing lug on the sensor connected directly and at a single point to the Equipotential
Bonding System.
5)
The manufacturer confirms that the verifications necessary to ensure that the electrical
equipment complies with the documentation will be carried out. All manufacture is to be
carried out using a fully ISO 9001 compliant sub-contractor and full documentation
retained for both the manufacture and testing process. Compliance is guaranteed by
design for all electronic and mechanical components and by process for the overall
manufacture.
6)
The equipment is prefabricated with an unterminated integral cable i.e. flying leads
which is nominally supplied in a 2 m long length but can be provided up to a maximum
length of 10 m.
7)
The equipment is supplied by an intrinsically safe source and is supplied with the terminal
parameters:
Ui = 28 V
Ii = 142 mA
Pi = 1.90 W
Ci = 1.08 nF
Li = 7.22 μH
1.
For Class 1, Division 2 applications the equipment should be supplied by a suitably
certified Power Source and the non-incendive output parameters do not apply.
2.
The equipment is also intended for use in process temperatures no greater than the stated
ambient temperature range of the product.
Any deviation from the above parameters requires input from Tan Delta Systems plc.
Where:
Ui ≥ Uob.
Ii ≥ Ioc.
Pi ≥ Pod.
Ci ≤ Co + Ccable
Li ≤ Lo + Lcablef.
Summary of Contents for OQSExISG2
Page 1: ...UG OQSxG2 23 0025 OIL QUALITY SENSOR ASSOCIATED ACCESSORIES USER GUIDE...
Page 2: ......
Page 5: ...Page 3 Page Intentionally Blank...
Page 37: ...Page 35 Figure 19 Connection to other Tan Delta and 3rd Party Products Interfaces...
Page 38: ...Page 36 Figure 20 ExOQSxG2 Ex Sensor Installation Drawing Rev 2 STAMPED...
Page 42: ...Page 40 8 Display Express...
