SPD202plus/Ex Combustible Gas Detector User Manual
This English user manual covers the FMF SPD202plus/Ex handheld combustible gas detector. It explains setup, zero calibration, gas measurement, unit conversion, data memory, alarm-threshold settings, battery replacement, and safety care. The supplied manual states that the instrument is factory-calibrated with methane and that its technical specifications are based on methane detection.
Download the SPD202plus/Ex PDF manual
Download the SPD202plus/Ex Combustible Gas Detector User Manual (PDF)
English · 8 pages · approximately 674 KB
Quick navigation
- Overview and intended use
- Technical specifications
- Controls and display
- Power-on and zero calibration
- Measurement and memory
- Alarm settings
- Battery, calibration, and care
Overview and intended use
The SPD202plus/Ex is designed for concentration measurement and leak detection of combustible gases, including natural gas, liquefied petroleum gas (LPG), coal gas, and hydrocarbon gases. The manual describes use in hazardous workplaces where these gases are produced, stored, or used.
The detector uses a catalytic-combustion sensor and a flexible 340 mm gooseneck probe. It displays methane readings as %LEL or in x10 ppm units, provides audible and visual alarms, and stores up to 99 measurements during the current power-on session.
Document identity: The supplied manual lists explosion-proof certificate number CQC1T25.0138X and product standard Q/XBR 001-2025. These identifiers are reproduced from the manual and have not been independently re-certified on this page.
Technical specifications
| Calibration gas | Methane |
|---|---|
| Measurement range | 0-100%LEL; 0-5000 x10 ppm |
| Resolution | 0.1%LEL; 5 x10 ppm |
| Alarm thresholds | Adjustable; factory defaults are ALA1 20%LEL and ALA2 50%LEL |
| Response time | ≤10 seconds |
| Measurement error | ±5% |
| Operating conditions | 0-40°C (32-104°F), 0-70% RH |
| Storage conditions | -10-50°C (14-122°F), 0-80% RH |
| Power | Four AA 1.5 V alkaline batteries |
| Instrument size | 70 × 160 × 40 mm |
| Probe length | 340 mm |
| Weight | Approximately 320 g including batteries |
Controls and display
| Control | Function |
|---|---|
| Power key | Press and hold to switch the detector on or off. |
| MODE | Cycles through Measurement, Recall, ALA1 setting, and ALA2 setting modes. |
| ZERO | Performs zero calibration in clean air. |
| MEM | Stores a measurement, increases the selected alarm-setting digit, or moves to the next stored record. |
| CLR | Clears stored records, moves the selected alarm-setting digit, or moves to the previous stored record. |
| Oval key | Switches between %LEL and x10 ppm. |
The display identifies zero calibration, Measurement and Recall modes, the stored-record number, measurement value, battery condition, ALA1 and ALA2 settings, and the selected measurement unit.
Power-on and zero calibration
Power on
- Install four AA 1.5 V alkaline batteries with the correct polarity.
- Press and hold the side power key for about 3 seconds.
- Wait until the display returns to zero and enters Measurement mode.
- In clean air containing no combustible gas, confirm that the display reads 0.0%LEL. If it does not, perform zero calibration.
Zero calibration
- Place the detector in clean air containing no combustible gas and let it stand for one minute.
- Press and hold ZERO. The ZERO indicator appears and the buzzer sounds continuously.
- After 6-8 seconds, confirm that the display reads 0, then release ZERO.
- The detector returns to Measurement mode and should read 0.0%LEL in clean air.
Measurement, units, and stored readings
Measure a suspected gas leak
- After power-on and zero calibration, bring the probe close to the suspected gas leak.
- Read the methane concentration shown as %LEL.
- For methane, the manual states that 100%LEL equals 50,000 ppm (5% by volume).
Switch measurement units
During measurement, press the oval key to switch between %LEL and x10 ppm. For methane, the manual states that 0.1%LEL equals 5 x10 ppm.
Store, clear, and recall readings
- In Measurement mode, press MEM to store the current value. The detector stores up to 99 readings.
- When memory is full, clear the previous records before storing new readings.
- Press and hold CLR in Measurement mode until the buzzer sounds once to clear all stored values.
- Press MODE once to enter Recall mode. Use MEM for the next record and CLR for the previous record.
- Stored values remain only during the current power-on session; switching the detector off and on clears all records.
Set and interpret the alarm thresholds
- From Measurement mode, press MODE once for Recall, twice for ALA1 setting, and three times for ALA2 setting.
- In an alarm-setting screen, press CLR to move the flashing digit and MEM to change its value.
- Set ALA2 higher than ALA1. If ALA2 is not higher, the ALA2 setting cannot be accepted.
- Press MODE again to return to Measurement mode.
The factory defaults are ALA1 = 20%LEL (10,000 ppm) and ALA2 = 50%LEL (25,000 ppm). During normal measurement, display characters are white. Above ALA1, the alarm repeats and the characters turn green and flash. Above ALA2, the alarm sounds faster and the characters turn red and flash faster.
Warning: Take appropriate action immediately when the detector alarms to prevent injury or loss.
Battery replacement, calibration, and care
- Replace all batteries promptly when the low-battery symbol appears.
- For measurement accuracy, have the detector calibrated once each year by a qualified laboratory or organization.
- Avoid high concentrations of combustible gas and do not leave the detector in high-concentration gas for long periods.
- Never spray lighter gas directly at the sensor; the manual warns that this can severely damage it.
- Protect the detector, especially the probe, from vibration, dropping, and mechanical damage.
- Keep it clean and away from water and other liquids.
- Store it in a dry, non-corrosive atmosphere and avoid silicone-containing materials, prolonged extreme humidity, heat, and contamination.
- Remove the batteries for long-term storage. If stored without power for more than six months, power it on and allow it to run for one day before use.
SPD202plus/Ex manual questions
Which gases does the SPD202plus/Ex detect?
The manual covers natural gas, LPG, coal gas, and hydrocarbon gases. The detector is factory-calibrated with methane, and the listed specifications are based on methane detection.
How do I zero the SPD202plus/Ex?
Let the detector stand for one minute in clean air containing no combustible gas, then hold ZERO for 6-8 seconds until the display reads 0.
How many readings can it store?
It stores up to 99 readings during the current power-on session. Powering the detector off clears the stored readings.
What are the default alarm thresholds?
ALA1 defaults to 20%LEL and ALA2 defaults to 50%LEL. ALA2 must be set higher than ALA1.
Related product and support
View the FMF SPD202plus/Ex combustible gas detector product page. For product or order questions, use the contact options shown on the FMF Supply storefront.