Hydro-Logic
®
Flexi Logger 100
User Manual
6 April 2018
Page 15 of 62
Sensors
The Hydro-Logic
®
Flexi Logger 100 can be used with many sensor types.
Sensors fall into these general categories:
•
SDI-12 sensors
•
4-20mA sensors
•
Tipping bucket rain gauges and other digital sensors
SDI-12 sensors
SDI-12 sensors are
“smart” sensors which can measure multiple parameters in
engineering units using the industry-standard SDI-12 protocol.
An SDI-12 sensor uses 3 wires and is connected to the Flex Logger 100 sensor
connector as shown.
Sensor address
Before you can read an SDI-12 sensor, you need to specify the sensor address
by configuring the logger with Harvest. Follow the steps in
to ensure that you can communicate with the logger.
First, you need to find the address of the sensor. Ensure that there is only one
sensor connected to the logger.
From Harvest, run the command
Start Wizard/Advanced logger options/SDI-
12/Request Sensor Address
:
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