AF043-01
US Patent 5148125
Revision Date: 14 March, 2001
6
Specification
Power supply voltage
9 to 26 volts, DC
Supply current
10mA average
150mA peak (for 60 milliseconds during measurement)
Output Signal
0 to 5 volts logic signal
Minimum load resistance
5 k
Time to measure
0.5 seconds after power is applied
Time between measurements
1 minute
Sensor faults
If a fault occurs, the sensor outputs a special signal of less than 10ppm, as follows:
Frequency
Fault condition
0 ppm
A broken wire or total failure of the sensor. Check the wiring and
repair. Contact your distributor if wires are intact.
2.5 ppm
Moisture reading out of expected range. If this output continues,
contact your distributor.
5 ppm
Low battery or supply voltage. Replace the batteries or check
power supply.
7.5 ppm
Critical sensor settings have been lost. Contact your distributor.
Conditions of Use
Aquaflex must be installed as specified. Use of Aquaflex data is entirely at the discretion of the
user and should therefore be subject to current best practice principles of soil moisture
management and agronomic management.
Neither Streat Instruments nor its Distributors shall be liable (whether in contract, tort or otherwise)
for any loss (including but not limited to loss of profits and consequential loss) of any kind whatever
arising out of any published material or in connection with the performance or use of Aquaflex.
The serial number marked on each Aquaflex Sensor must be recorded and quoted for warranty
claims.
Streat Instruments Limited
4A Expo Place
PO Box 24071
Christchurch
New Zealand
Envirofactors Limited
3 Water Lane
Bradford BD1 2JL
United Kingdom
Ph: +64 3 384 8900
Fax: +64 3 384 8901
www.streatsahead.com
Ph: +44 1274 733 145
Fax: +44 1274 732 410
[email protected]
www.envirofactors.com
