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INTRODUCTION
This supplement describes the installation and operation of UNIDATA’s
Model 6529 Automatic Evaporation System. This is an advanced system that
automatically operates an evaporation pan and records the evaporation and
rainfall data. The instrument is normally supplied as a complete package with
a US Class A evaporation pan and all installation fittings. It can be connected
to any other type of pan.
The system is designed to operate for long periods without maintenance. The
water level transducer and data logger operate for one year from internal
batteries. The water level control system is solar powered. The water supply
to refill the evaporation pan is provided by the user from a tank or a
reticulated water supply pipe. Rainfall removed from the pan can be recycled
if required.
Automatic Evaporation System
INTRODUCTION 1
Evaporation pan
with bird guard
Water level monitoring
and control system
A water temperature sensor and a range of weather sensors can be added to
identify the relationship between pan evaporation and site conditions. This is
required for evaporation and evapo-transpiration studies and modelling. An
optional telemetry system can be connected to the datalogger. Landline,
cellular, satellite and radio communicationlinks can be used to monitor data
and operate the site.
1.1
Major Components Of Model 6529-1
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Water Level Monitoring And Control System
Model 6529A
Water level monitoring system for STARLOGGER.
Model 6529A/C
Water level monitoring system with integrated
Micrologger to record data.
Model 6529E
Automatic water level controller.
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Evaporation Pan And Bird Guard
Model 6529C
Evaporation pan 1200mm diameter, fibreglass.
Model 6529D
Bird and leaf guard for Model 6526C.
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Weather Monitoring Instruments
Additional instruments that can be added to the Model 6529A/C are:
Model 6529B
Thermistor and float assembly to measure pan water
temperature.
Model 6506A
Tipping bucket rain gauge.
If the Model 6259A and STARLOGGER are used, any additonal UNIDATA
instruments can be added such as:
Model 6504FS
Wind speed and direction.
Model 6501DU
Air temperature, relative humidity, and solar radiation.
Model 7201A
Net Radiation.
Model 6513A
Soil Moisture.
Model 6522B
Barometric Pressure.
UNIDATA
2 INTRODUCTION