Instruction Manual

227 Delmhorst Cylindrical Soil Moisture Block

TABLE 7-2. Excitation and Voltage Ranges

Datalogger mV Excitation Full Scale Range

CR800/CR850 250 ±250 mV

CR1000 250 ±250 mV

CR3000 200 ±200 mV

CR5000 200 ±200 mV

CR9000(X) 200 ±200 mV

21X 500 ±500 mV

CR7 500 ±500 mV

CR500/CR510 250 ±250 mV

CR10(X) 250 ±250 mV

CR23X 200 ±200 mV

Do not use a slow integration time as sensor polarization errors

will occur.

NOTE

7.2.3 Calculate Soil Water Potential

The datalogger program can be written to store block resistance or can

calculate water potential from a block calibration. The soil water potential

versus resistance values in TABLE 7-3 are typical values supplied by

Delmhorst Corporation.