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Toxic Gas Manual Glossary

  • AC Power Supply/Charger
    Device used to power the instrument or recharge its internal battery

  • Acrodisc Filter
    An internal filter used within the flow system to maintain the cleanliness of air samples

  • AddSorb®
    Proprietary scrubber material designed to absorb contaminants like hydrogen sulfide

  • Alarm Levels/strong>
    Configurable thresholds that trigger a visual and or audible alarm when gas concentrations exceed the set values

  • Auto-Range Mode
    Sampling mode in which the instrument automatically determines the appropriate ranges for gas concentration, improving accuracy for unknown levels

  • Auto-Sample Mode
    Feature allowing periodic automated sampling at user-defined intervals
     
  • Auto-Zero
    Functionality that resets the instrument’s baseline reading to zero ppb/ppm between samples for accurate measurements

  • Atomic Fluorescence Spectroscopy (J505 Only)
    Detection method where mercury atoms absorb UV light at 254 nm, re-emit it, and are detected to measure concentration

  • Battery Maintenance
    Guidelines for charging, storing, and maintaining the battery including periodic full discharge and recharge to prevent the memory effect

  • Battery Management
    Procedures to ensure optimal performance and longevity of the battery

  • Battery Pack
    Rechargeable NiMH battery that provides power for portable operation, battery life varies by model

  • Calibration
    Process of adjusting the instrument to ensure accurate measurements, typically performed annually with NIST-traceable standards

  • Chemsorb®
    Material used in scrubber filters to remove hydrogen sulfide and other contaminants

  • Chlorine Filter
    Specialized filter used to remove chlorine gas, preventing interference in readings

  • Communications Software
    Software enabling remote programming, data logging, and statistical analysis

  • Controlled Heat Film
    Feature ensuring the complete removal of absorbed gas during the sensor regeneration process

  • Data Logger
    Accessory enabling automatic sampling, alarm triggering, and data storage for up to 1,000 data points

  • Data Storage Capacity
    Models can store thousands of data points in non-volatile memory, including sample values, time, date, and location

  • DIP Switch Settings
    Configurable settings on the circuit board enabling features like auto ranging and sampling interval adjustments

  • Display Modes
    Options to present results

  • Exhaust Port
    Located on the back of the instrument, this expels scrubbed air after sampling to prevent contamination

  • Factory Calibration
    Comprehensive service including filter replacement, component testing, and calibration to NIST-traceable standards

  • Flow System
    Mechanism controlling airflow through the instrument, including filters and tubing, critical for maintaining accuracy

  • Fritware Filter
    A small disc filter installed at the intake to prevent particles from entering the flow system, requires regular replacement

  • Functional Test Module (FTM)
    A tool for verifying the instrument’s functionality by introducing a known gas concentration

  • Gas Flow Rate
    Standard operational parameter ensuring consistent air sampling

  • Gold Film Sensor
    Core detection mechanism that measures gas concentration by detecting changes in electrical resistance

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  • Instrument Zeroing
    Process of setting the analyzer’s baseline reading to zero after regeneration, ensuring accurate measurement

  • Internal Battery Pack
    Rechargeable power source within the instrument, supporting hours of operation on a full charge

  • I/O Interface
    A 25-pin connector on the back for specialized functions like communication, data logging, and analog outputs

  • Maintenance Schedule
    Detailed plan for regular tasks like filter replacement, battery checks, and calibration to keep the analyzer functional

  • Manual Sampling
    Mode where the user initiates each sample manually, preferred for high precision and controlled measurements

  • Memory Effect
    Phenomenon in NiCad batteries where partial discharges reduce capacity; prevented by periodic full discharges and recharges

  • Memory Usage
    Displays the percentage of data storage currently used, shown in the instrument’s system menu

  • Preventive Maintenance Calendar
    Guidelines for regular tasks, such as fritware or filter replacement, ensuring consistent performance

  • Pump
    An internal component that draws air into the analyzer for sampling

  • Regeneration Cycle
    Process lasting 45 minutes, the heat cycle of the regeneration is 10 minutes and the complete cycle takes 45

  • Recharge Time
    Time required to fully recharge the internal battery, typically around 3 hours

  • Response Time
    Time taken for the analyzer to produce a reading, varying by range and model

  • Scrubber Filters
    Filters in the flow system that absorb harmful gases during sampling and regeneration

  • Sensor Saturation
    Occurs when the sensor absorbs its maximum gas capacity, requiring regeneration

  • Sensor Saturation Meter
    Graphical indicator on the display showing the saturation level of the sensor

  • Survey Mode
    Mode for continuous sampling, used for locating gas sources or high-concentration areas: less precise than manual sampling

  • Tygon® Tubing
    Flexible tubing used in the flow system to ensure unimpeded airflow and accurate sampling

  • Warm-Up Routine
    Preparatory procedure to stabilize the instrument’s electronics and temperature for accurate sampling, especially at low concentrations

  • Zero Air Filter (ZAF)
    A component that removes contaminants like hydrogen sulfide, mercury vapor, and other impurities from air samples, ensuring accurate baseline readings