If you need to reprogram or enter new data into the HydroSense meter, please follow these
instructions as appropriate:
!
To enter the meter's ID identifier number
.
This ID number appears each time you switch the meter on. If data offload via RS232 is used to
download the stored memory onto a PC, this ID number is also sent at the end of the data.
Press 6 - Set parameters, press 6 - Difn'l OS/ID, and press 2 - Edit ID number.
The currently set value (if any) is shown. Enter the ID number required, for example the unit's serial
number, using the keypad, and press ENTER. Press ENTER again to store the new ID number.
!
To set the date and time.
Press 8 - Set Clock. Enter the time and press ENTER. Enter the date and press ENTER. Your entries
will be displayed, press ESCAPE to exit.
!
To enter calibration factors
.
The sensor you wish to use with the HydroSense should have a 0-50 mV differential voltage output.
You also need details of its sensitivity in millivolts per unit, and zero offset figure in millivolts, if
appropriate.
To calculate the Full Scale (FS) figure to enter into the HydroSense meter;
FS = 1000 / (mV
per unit * 19.238)
The Zero Offset (OS) figure to enter into the HydroSense meter is the sensor's zero offset in
millivolts.
You can now enter these figures into the meter using the keyboard, or via the PC and the meter's
RS232 socket.
a) via the meter keyboard
Press 6 - Set Parameters, press 3 - Edit Factors.
For each sensor in turn, enter its number (No), for example, 00 for the first sensor, 01 for the second
sensor etc. Press NEXT to pass to the next entry. Enter the Length of the tensiometer (in cms). Then
enter the FS and OS figures calculated above, remembering to enter the + or - sign for the offset as
appropriate. Press ENTER to make these factors the 'current' ones - which means that these factors
will now be used to display / record values from the sensor currently plugged into the meter.
Repeat for each sensor. To check the entries, press 6 - Set Parameters and press 1 - Browse Factors.
Press NEXT to scroll through the entries you have made.
b) via the PC.
Firstly run the Skye Lynx Standard communication (choose settings for DataHog1). This software is
available for free download for the Skye Instruments website
if it was not
supplied with your meter.
Connect the HydroSense meter to the PC using the datalead.
On the meter, press 6 - Set Parameters and press 9 - Fctrs - RS232edt. Press ENTER to proceed.
A message will appear on the PC screen asking you to enter the factor number (No), use the PC
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HydroSense Setup
WATER & SOIL
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