7
The Field Scout Soil Sensor Reader uses a standard 9V bat-
tery. To change the battery:
1. Slide open the door on the back of the meter.
2. Remove the old battery from the compartment, and insert
the new battery. Be sure to orient the battery to match the
image on the bottom of the compartment.
3. Place the battery cover on the case and slide it closed.
calibration is complete, the internal sensor constant will
not be modified and this step should be repeated.
6. Disconnect the sensor plug.
7. Rinse and dry the sensor. Take care not to touch the EC
sensor pads with your fingers.
8. Store the sensor in plastic bag until you are ready to in-
stall it in the field.
Changing the Battery
Calibrating the SM100
SM100 sensors with the “3/14” code printed on the front can
be re-calibrated to the factory setting. The calibration proce-
dure is nearly identical to that used to calibrate the SMEC300
EC circuit. The calibration is done with distilled water. The
SM100 does not have an internal thermistor. So, when per-
forming the soil moisture calibration, the sensor molding does
not have to be immersed. For soil sensor readers with firm-
ware version 4.4, the calibration screen will read “CAL EC?”.
The calibration procedure for the SM100 will still work as
designed.
Note: The soil moisture circuit of an SMEC300 can not be
calibrated to the factory setting.
