Model 407777 Version 2.2 Jan 04

6

Battery Replacement

When the low battery indicator LBT appears, the 9V battery should be replaced.

1. Remove the rubber protective holster that surrounds the meter.

2. Remove the battery compartment cover, located on the lower back of the meter, with a

coin or a flathead screwdriver.

3. Replace the 9V battery.

4. Close the battery compartment and affix the protective holster.

RS-232 PC Interface

The Meter includes a PC interface for use with optional Data Acquisition Software and

interface cable kit (Part Number 407001). Operational instructions for the interface and

software are supplied with the optional interface kit.

Calibration

Calibration Verification

1. Ensure that the RECORD function is not engaged (REC icon is not on the LCD).

2. Select Material Group 1 using the Material Select button.

3. Press and hold both the CALIBRATION and the “+“ buttons.

4. The display will begin to count down from 5 to 1.

5. If the meter's existing calibration is correct, the LCD will display "good"

6. If the meter's existing calibration is incorrect, the LCD will display "Err".

7. If the calibration is incorrect follow the steps in the next section to recalibrate.

Calibration Procedure

1. Remove the Meter's protective rubber holster.

2. Select Material Group 1 via the Material Select button.

3. Remove the rear battery compartment cover and locate the VR1 potentiometer that sits

inside the battery compartment on the left side.

4. Press and hold the “+” Calibration button.

5. Adjust VR1 for a display of "18.0".