A8.4
The performance of pressure compensation will be degraded if
the separation of the Transducer and Control (or Interface) units
exceeds 30m.
Pressure compensation cannot be fitted to 1100H systems.
Effect of supply voltage A change of +/! 10% in the supply voltage will cause the output
variation: to change by less than 0.02% O
2
or 0.2% of FSD, whichever is
the greater.
Effect of supply interruptions: A single cycle interruption in electrical supply will have no effect
on the analyser.
Response time: At a sample flow rate of 200ml/minute a 90% response to a step
change at the analyser inlet will be obtained in less than 4
seconds. (5 seconds for type 364 cell and 1132 transducer).
The addition of a sampling system will increase the response
time.
Interference RFI: Less than +/! 0.1% O
2
change due to interference caused by a
3 watt RF transmitter of 144 and 432 MHz with 1/4 wavelength
antenna located 1 metre from case.
Level sensitivity: Less than 0.01% O
2
change per degree of tilt from attitude at
time of calibration.
Magnetic: Soft magnetic materials brought into contact with the transducer
case will cause an error of less than 0.05% O
2
.
5. Physical Characteristics
Case classification
all units: IP54, NEMA 4
Case construction: Cast aluminium alloy, finished in corrosion resistant epoxy
powder paint
Front panel: Aluminium panel finished in epoxy powder paint and with
polycarbonate label or keyboard.
External dimensions: See Figure 2.1(a) to 2.1(d).
Weight: Control unit 20Kg (44lbs)
Interface unit 20 Kg (44lbs)
Transducer unit 1131/1133 16 Kg (35lbs)
Transducer unit 1132 17 Kg (37lbs)
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