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2.2.4 Humidity
2.2.5 Surface
2.2.6 Temperature
2.2.7 Waves
2.2.8 Wind
2.3 Installation Checklist
2.4 Connecting the Cable
2.4.1 Cable Connection:
TIENet Barrier
TIENet™ 360 LaserFlow Ex™ Velocity Sensor
Conditions of extremely high or low humidity affect the speed of
sound. To minimize this effect place the sensor as close as pos-
sible to the flow stream.
Solids, foam, oil, and turbulence can absorb or scatter the ultra-
sonic and laser signals, causing errors in detection. Foam or oil
on the surface of the stream can also produce false level readings.
Changes in ambient temperature significantly affect the velocity
of sound. If ambient temperature changes rapidly, there may be a
delay before the temperature sensor of the ultrasonic transducer
can activate temperature compensation. Compensation is based
on sensor temperature, to minimize the effect of air temperature
gradients place the sensor as close as possible to the flow stream.
Note
If the sensor is installed outdoors in direct sunlight, use a sun-
shade to prevent heating of the sensor housing.
Waves on the surface of the flow stream can scatter the ultra-
sonic signal, causing erroneous readings or total loss of signal.
The flowmeter software rejects occasional readings that deviate
substantially from normal.
Strong winds can reduce the strength of the ultrasonic return
echo. To minimise effect, place the ultrasonic level measurement
as close as possible to the flow stream.
Prior to installing the system, ensure that you have all supplies
and site information readily available.
To assist you in this preparation, this manual includes the
Installation Checklist, page B-1. Teledyne ISCO recommends
that you print this appendix and fill in the relevant information.
The LaserFlow Ex cable will have one of two different connector
types:
• Unterminated for the TIENet Barrier
Note
The TIENet Barrier connects to the Signature and the 2160
module.
LaserFlow Ex must connect to the TIENet Barrier. For more
information, see the TIENet Barrier Installation Guide.
Section 2 Preparation and Installation
2-7
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