Operating Instructions
Van Walt Ltd | Prestwick Lane | Grayswood | Haslemere | Surrey | GU27 2DU | Tel. 01428 661 660 | Fax. 01428 656 808 | www.vanwalt.com
Rain Gauge
4
VAN WALT
Monitoring your needs
Rain gauge
Diameter rain gauge
: 254 mm Height rain gauge
: 340 mm Output signal
: contact
Nominal measurement sensitivity
:
0.20 mm rain fall per contact
Maximum contact power
:
300 mA Power supply
:
None
Weight
:
1
kg
3.
Taking into use
3.1
Settings
2.
Technical specifications
Datalogger
Number of channels
:
2 channels
Memory capacity
:
30,000 measurements per channel
Measurement intervals
:
1...60 seconds
:
1...60
minutes
:
1...24
hours
Datalogging method
:
Measures at chosen times Resolution
:
0.0033%, 15 bit (data storage) Clock accuracy
:
<1
sec.
per
day
Alarm
:
0...100% of the measuring range
Battery status
:
0 to 100% Temperature operating range
:
-20 ... +70 °C Relative humidity range
:
0...100%
Power supply
:
3.6 V (AA) lithium battery 2.3 Ah
Battery life
:
6 years (typical for 10-minute sample speed)
There is no need to configure any settings before installation of the datalogger. To achieve
optimal measurement precision the datalogger’s factory settings for the range can be used.
The rain gauge is factory-calibrated and is supplied with a calibration specification, which state
the actual measuring sensitivity, the so-called calibration factor. The deviation of this calibration
factor from the nominal sensitivity is 2% at most, which means that the accuracy is always
greater than 2% if the Range setting is not introduced.
