Bump testing versus calibration — GX-3R Pro

Power-on checks, bump tests and calibration differ

Checking lights, sound and vibration at power-on is different from applying test gas to check sensor response. The GX-3R Pro has separate BUMP test and calibration menus.

Fresh-air adjustment alone does not demonstrate response to a test gas or verify span sensitivity. Identify the actual procedure whenever a record uses the general term calibration.

Korean manual · Startup, air adjustment and detection, pp.34–41 · Korean manual · Maintenance, pp.86–88 and 101–105 · Korean manual · BUMP test, pp.99–100

Preparing and running a GX-3R Pro bump test

Match the actual sensors to the gas identity, concentration and expiry. Section 7-2-1 describes preparation using a dedicated calibration adapter, sampling bag and pump. Do not copy another manufacturer’s flow rate or connections, and never use lighter gas for a response check.

After preparation, select the BUMP test in user mode and cylinder group A–E matching the actual test gas. Confirm the selection, apply gas in the order described in section 7-3-1 and check the results. Do not record a test for a gas that is not fitted or was not tested.

The Korean manual’s pages 88–90 and 99–100 contain the precise preparation and operating sequence. Span adjustment requires dedicated equipment and gas; arrange it with the manufacturer or trained maintenance personnel.

Korean manual · Gas-calibration preparation, pp.88–98 · Korean manual · BUMP test, pp.99–100

Read BUMP and automatic-calibration results separately

The manual shows BUMP results on the left and calibration results on the right, with P for pass and F for fail. If configured, a failed BUMP test can trigger automatic gas calibration. A successful final screen must not be recorded as an initial bump-test pass.

Hold equipment out of service if test or calibration failures remain. Check gas, connections and sensor condition. Resetting an alarm or disabling a reminder does not resolve a failure.

The manual’s default 30-day BUMP expiry reminder is a configuration value, not a universal test interval or a guarantee of performance for that period. Use a maintenance plan appropriate to actual conditions and workplace procedures.

Korean manual · BUMP test, pp.99–100 · Korean manual · Maintenance, pp.86–88 and 101–105

Care and periodic maintenance

The Korean manual specifies checks before daily work, monthly alarm-function checks and periodic maintenance at least annually, ideally every six months. These are different tasks, not one interchangeable calibration interval. Contamination, impact or abnormal response requires attention without waiting for the scheduled date.

Inspect battery condition, readings and filter contamination or blockage. Switch off before cleaning and use a well-wrung damp cloth. Do not spray water or use alcohol, organic solvents or ordinary detergents. Charge and replace batteries only in a non-hazardous location.

Sensors and filters are consumables. If span adjustment fails or readings remain unstable, stop using the instrument and contact the manufacturer. Complete the required functional checks after parts replacement before returning it to service.

Korean manual · Maintenance, pp.86–88 and 101–105 · GX-3R Pro Korean operating manual · PT0ko-1778