When purchasing a quantitative gas leak detector, in addition to price and specifications, whether routine maintenance is convenient and which operations may affect detection results are often the key factors determining the long-term usability of the equipment. The following answers several common questions from procurement personnel from the perspective of maintenance and precautions.
Maintenance of the GD-2600 quantitative gas leak detector mainly involves three parts: the sensor, the gas path, and the battery. The sensor is recommended to undergo a response check with standard gas every 6 months; if the reading deviation exceeds 10%, calibration should be performed according to the instruction manual. The filter and sampling probe in the gas path should be inspected every 3 months, and if dust accumulation or oil contamination is found, they should be replaced or cleaned promptly. The battery pack should be fully charged after each use before storage; when not in use for a long time, recharge it every 3 months to avoid damage from over-discharge. The specific maintenance intervals can be appropriately adjusted according to the frequency of on-site use.
Before leak detection, confirm that the sampling probe and hose connections are not loose to avoid ambient gas mixing in and affecting readings. During measurement, the probe should be moved slowly from below the suspected leak point, with a recommended movement speed not exceeding 0.05 m/s; moving too fast may easily cause missed detection. After turning on the instrument, allow 3–5 minutes for warm-up and wait for the reading to stabilize before starting measurement. In addition, avoid prolonged use near strong electromagnetic interference sources or in high-concentration dust environments to prevent sensor drift. After each use, let the instrument run in clean air for a few minutes to purge residual gas from the gas path.
The GD-2600 supports on-site calibration, requiring standard gas corresponding to the range, a calibration adapter, and a flow meter. Before calibration, confirm that the standard gas is within its validity period, and perform calibration at an ambient temperature of 5–40°C and relative humidity not exceeding 85%. Enter calibration mode according to the menu prompts, complete zero-point and span-point calibration in sequence, and after saving, re-measure once to confirm the deviation is within the allowable range. If standard gas conditions are not available on site, it is recommended to return the instrument to the factory or send it to a qualified metrology institution for calibration.
This model has a detection range of 1–5000 ppm, a minimum detection value of 1 ppm, a response time of less than 10 seconds, and supports multiple switchable ranges, each corresponding to an independent standard curve. When purchasing, the commonly used range can be selected according to the main leak detection target; in routine maintenance, it is recommended to regularly check each range to avoid long-term use of only one range causing curve drift in other ranges. After switching ranges, wait for the reading to stabilize before recording data.
Frequent direct measurement in high-concentration leak environments, failure to purge the gas path promptly, long-term storage at full charge and high temperature, use of non-original chargers, and dropping the probe or water ingress will all shorten the service life of the sensor and circuits. It is recommended to equip a portable case for storage, clean the outer surface of the probe promptly after use, and record each maintenance and calibration for traceability.
The GD-2600 quantitative gas leak detector is suitable for leak detection of SF6 equipment gas compartments in substations, leak point troubleshooting of GIS combined electrical apparatus, and tightness verification after equipment maintenance. When purchasing, the long-term use cost can be evaluated in combination with maintenance conditions and calibration resources.
