Campbell DMM600 Instrukcja Obsługi Pobierz pdf (Strona 14)

DMM600 Duff Moisture Meter

5.3.2 Indicators

Three circles provide serial communications information.

The left circle indicates which serial communications port is selected. The

circle is green when the connection is successfully made.

The TX circle is green during transmission from the computer to the

DMM600. The RX circle is red during transmission from the DMM600 to the

computer.

5.3.3 Command Buttons

Send Calibration Coefficients sends calibration name (maximum of 4

characters) and the user-specified calibration coefficients to the DMM600.

Receive Calibration Coefficients receives and displays calibration name and

calibration coefficients from DMM600.

Read Battery Voltage reads voltage of 9 volt battery in DMM600 and displays

value.

Reset DMM600 calibration removes any user-defined calibration and sets

calibration to factory default.

6. Calibration

6.1 General Discussion

The factory supplied calibration was derived using duff from lodgepole pine,

spruce, Douglas fir and larch forests. The response of the DMM600 is similar

for these types of duff. If the DMM600 is used with significantly different

materials, a material-specific calibration can be derived.

6.2 Equipment Required for a Calibration

• plastic bags to store samples

• a scale to measure sample weight

• containers to hold samples for weighing and while drying in oven

• a drying oven or microwave to dry samples

6.3 Calibration Procedure

6.3.1 General Description of Calibration Procedure

The calibration requires duff samples with a range of water contents. The

collected sample will be measured with the DMM600, removed from the

DMM600 and weighed, then dried and weighed. Water will be added to the

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Campbell DMM600 Instrukcja Obsługi Strona 14