GAC 2700 Support Center

• After every testing session: empty grain drawer, brush out cell chamber.
• Weekly (or more in high-dust environments): wipe hopper, sensors, housing.
• Monthly: thorough inspection and deep clean per operator's manual.

• LCD display: commercial glass cleaner on a soft cloth. Never spray directly on screen. No solvents, acids, or alkalis.
• Exterior housing: cleaner rated for plastic and stainless steel. Wipe dry.
• Grain hopper & upper sensors: dry cloth wipe; remove grain debris.
• Grain drawer & lower chamber: empty completely after every use; brush out residual kernels.
• Load cell area: use low-pressure compressed air or a dry soft brush. Do NOT use water or wet cloths near the load cell.
• Temperature sensor: self-cleaning on most GAC 2700 units — do not scrub.

1. Download the current calibration ZIP file from ams.usda.gov or dickey-john.com.
2. Insert a USB flash drive into your computer and remove all existing files from the drive.
3. Extract the ZIP file; copy all files to the root directory of the USB drive (not a subfolder).
4. Power the GAC 2700-UGMA OFF completely.
5. Insert the USB drive into the USB port on the front or rear of the unit.
6. Power the unit ON. It will automatically detect and load the calibration files, backing up existing ones first.
7. Verify the desired grain calibrations appear in the grain selection menu before removing the USB drive.

Contact DICKEY-john Technical Support at 1-800-637-3302 or your authorized distributor to obtain and verify the correct AGRI calibration package before loading.

1. Connect a compatible USB printer to the USB port on the rear of the unit.
2. Power on the printer before powering on the GAC 2700, so the unit detects it at startup.
3. Access Setup from the main menu and confirm Printer is set to Enabled.
4. Run a test sample and press the Print button to verify output.

• The unit must be on a flat, hard, level surface for accurate weighing. Readings are significantly affected on tailgates, soft surfaces, or tilted shelves.
• Avoid vibration sources — tractors, fans, and grain augers running nearby can disrupt the load cell tare and trigger Error 2.
• Recommended: use a small bubble level to verify the surface before each testing session.
• Avoid testing in direct sunlight or extreme heat, which affects temperature compensation.

• Always power off completely and empty the grain drawer before moving.
• Reinstall shipping brackets before any transport — even short moves across a farm. The load cell is sensitive; vibration without brackets can push it out of calibration.
• Do not lay the unit on its side or stack items on top during transport.
• Use original packaging when shipping; ensure the unit is well-cushioned.

• Ensure the grain sample is at or near ambient temperature. Cold grain from a bin produces low moisture readings — let the sample equilibrate for 10–15 minutes if possible.
• The sample should be free of foreign material — dirt, chaff, broken kernels, and weed seeds all affect readings.
• Do not overfill the hopper; use the standard sample quantity specified for the grain type.
• Avoid testing in direct sunlight or extreme heat, which affects temperature compensation.
• Run two tests and compare. If they differ by more than 0.5%, check for grain or debris remaining in the cell.