PrimeLog
PrimeLog User Manual
9
1.3 Hardware Connections
1.3.1 Sealing
The connectors fitted to PrimeLogs are waterproof only when mated with a matching
connector, or when the captive sealing cap is fitted.
For continued full environmental performance it is essential that the sealing caps are fitted
unless the connector is in use.
Sensors supplied by Primayer are factory-fitted with sealed matching connectors. Connectors
fit with a bayonet (twist-and-click) action of the rotating shell.
Connectors will seal correctly only if foreign matter is excluded from the mating faces. Logger
sensors operate at low levels of current, consequently any penetration of moisture is likely to
cause electrical leakage causing degradation or destruction of data. Contaminated
connectors may be cleaned by scrubbing with a brush using industrial alcohol (methylated
spirits).
It is good practice when connections are made to ensure that the sealing caps are also mated
to each other. This prevents dirt and moisture accumulating in the cap and so being
transferred to the connector.
1.3.2 Polarisation
All PrimeLog connectors are polarised, such that it is impossible to connect the wrong input.
1.3.3 PrimeLog Input Connections
PrimeLog loggers have their connectors identified by logos, which are shown against the
appropriate input below.
IMPORTANT: Due to the operational requirements of depth transducers, it is essential that
the connector is never immersed in or exposed to water. The vent tube from the transducer
sensor is terminated at the connector and must be open to atmosphere to sense pressure in
vented gauge mode. If water is allowed to enter the vent tube then the operation of the sensor
may be impaired or irreparably damaged. This damage is not covered by any warranty.
1.3.3.1 Digital Inputs
Commonly it is only necessary to connect the sensor correctly, as the logger provides the
necessary power. Sensors which require to be powered by an external power source are
discussed in the chapter on Interfacing.
If the logger starts before the sensor is connected, no malfunction will occur but the data up to
the time when the sensor was connected will be zero values.
1.3.3.2 Internal Pressure Transducer
Loggers fitted with an internal pressure transducer have a male quick-release connector
mounted on the logger end cap.
The integral pressure transducer is available in a wide range of sensitivities, from 3 bar to 25
bar. Damage may occur if the transducer is subjected to pressures of more than 150% of its
range. The zero point calibration of the transducer may change if the logger is subjected to
shocks, but this offset can be compensated by calibrating the logger.
(no logo)
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