GH5640 & GH5645 Manual

GH5640 & GH5645 FUEL METER

Limited 1 Year Warranty

Sealing Procedure:

STEP 1: Apply PTFE paste to male threads

STEP 2: Apply Teflon tape over paste

STEP 3: Apply second coating of PTFE paste over tape

Reset to 0

Press “CALIBRATE” for 1 second

Flow Rate

“GAL/Min” on display reads flow rate in GPM

Cumulative Total

Press “DISPLAY” to view the total units measured. When the meter reaches 999,999 it will automatically reset to zero

Switching Units:

1. Press & hold "DISPLAY" (3 sec).

2. Press "CALIBRATE" 5 times.

3. Press "DISPLAY" to select unit.

4. Wait 5 sec to save.

Calibration Steps:

1. Press & hold "DISPLAY" (3 sec), then press "CALIBRATE".

2. Use "CALIBRATE" to switch columns, "DISPLAY" to adjust.

3. Calibration works at any volume (5 gallons recommended).

4. Example: If meter shows 103 gallons after 100 gallons flowed:

o Divide 103 ÷ 100 = 1.0300, enter 1.0300.

5. Meter saves settings & returns to home screen after 5 sec.

Default is 1.000 for diesel & gasoline. Note this is a estimation. For a more accurate reading recalibration is required.

For in-depth calibration instructions:

· Maintenance-free – Use filtered fuel for longevity.

· Removing battery resets meter to zero.

1. Open your phone’s camera app.

2. Point the camera at the QR code.

3. Tap the link that appears on your screen.

Visit www.walstonindustrial.com for more information

Phone: 1(415)710-4396

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