Pulsar FlowCERT LITE, Instruction Manual

Page: 22 / 150

Page 14
Important Information
Please note that if the output of the ultrasonic transducers used with
the
FlowCERT L
ITE
are capable of emitting sound pressure levels in
excess of 85dBA (above a reference sound pressure level of 20µPA),
then the FlowCERT L
ITE
must be located remote from the transducer
such that a sound pressure level of 85dBA is not exceeded when
standing at the
FlowCERT L
ITE
in the operators position.
Care should be taken not to over tighten the screws.
Relay Outputs
The five relays can be programmed for a variety of alarms, pump control, or
other process functions. The relay contacts are all rated at 5A at 115V AC.
Wiring should be completed by using suitable cable, to meet the specified
115V AC 5A contact rating, up to maximum size of 14AWG.
All connections should be such that the short circuit capacity of the circuits
to which they are connected, is limited by fuses rated so that they do not
exceed the relay rating.
Current Output
This is an isolated (floating) mA output (to 150 V), of 4 - 20mA or 0 -
20mA, and the load should not exceed 500

.
Temperature Input
The external temperature sensor allows more localised compensation of the
measured distance due to changes in temperature.
There are two models, Type A and Type B as follows:
Type A -25
º
C to 50
º
C
Type B -25 º C to 125 º C
Important Information
The temperature sensor should be placed close to the point of
measurement and out of the effects of direct sunlight. This allows
for the temperature sensor to measure the true air temperature,
thereby giving the most accurate results.