BASIC AMMONIA GAS DETECTOR
Uživatelská příručka
Model: FD-92-AMMONIA
Verze pro ruční tisk: 1.0 
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SPECIFIKACE
| Ammonia (NH3) Detection: | 0 – 100 ppm s rozlišením 0.1 ppm |
| Calibration Period: | 12 měsíců |
| Typ senzoru plynu: | Elektrochemický senzor plynu |
| Životnost senzoru plynu: | 2 – 3 let |
| Chyba: | ≤ ± 5 % z rozsahu |
| Doba odezvy: | <60 s |
| Poplach: | LED, Buzzer, and vibration |
| Store / Operating Temp: | 0 °F – 122 °F |
| Store / Operating Humidity: | <95% RH |
| svtage: | DC 3.7V Li-battery 2000 mAh |
| Pracovní doba: | > 24 hodin |
| Doba nabíjení: | 3 hodin |
| Hmotnost: | 5 g (včetně baterie) |
| Rozměry: | 4.3 x 2.3 x 1.7 palce |
NÁŠ PŘÍBĚH
Forensics Detectors is a California-based technology leader in advanced gas sensing and measurement solutions. Our mission is to deliver cutting-edge air quality monitoring technology that protects lives and the environment. Based in the stunning Palos Verdes Peninsula of Los Angeles in California, we blend precision engineering with a commitment to safety. Our dedication to excellence drives us to create reliable gas detection systems that set industry standards for accuracy and performance.
ZAVEDENÍ
The FORENSICS DETECTORS Basic Ammonia Gas Detector is made to be a workhorse with its easy one-button operation. The detector is constructed with a high-quality electrochemical sensor and comes factory-calibrated. Ammonia is a toxic gas that requires continuous detection to ensure wellness for human occupants and your livestock, particularly in occupational spaces and farms. For livestock, here are some important Ammonia levels to consider:
| Levels (ppm) | Efekty | Zvíře | Poznámky |
| < 10 ppm | Ideal exposure limit | All livestock | Less than 10 ppm is the ideal limit for exposure |
| 10-20 ppm | Levels in ventilated buildings with liquid manure systems | All livestock | Typical ammonia levels with liquid manure systems |
| 10 ppm | Trachea irritation | krůty | Trachea irritation was shown in turkeys |
| 20 ppm | Increased susceptibility to Newcastle disease | Drůbež | > 20 ppm, increased rate of infection of Newcastle disease was found |
| 20-25 ppm | Increased susceptibility to secondary challenges, decreased feed efficiency, tissue damage | Drůbež | Exposure to 20–25 ppm throughout production can result in increased susceptibility to secondary challenges, decreased feed efficiency and tissue damage |
| 25 ppm | Maximum suggested exposure limit before harmful effects | All livestock | Best to keep less than 25ppm. |
| 30 ppm | Causes local and systemic low- grade inflammation | Laying hens | Systemic low-grade inflammation based on its levels and exposure durations |
| 50 ppm | Levels in buildings with solid floors where manure & urine exist | All livestock | Levels can exceed 50 ppm with lower winter ventilation rates |
| > 50 stran za minutu | Increased keratoconjunctivitis and tracheitis | Drůbež | > 50 ppm, increased levels of keratoconjunctivitis and tracheitis observed |
| > 100 stran za minutu | Significantly increased mortality | Kuřátka | At above 100 ppm, the chick mortality was increased significantly |
| >100-200 ppm | Levels found in poorly ventilated buildings | All livestock | Levels can reach 100 to 200 ppm in poorly ventilated buildings |
Poultry manure contains twice as much ammonia as dairy cattle manure. In order of greatest ammonia manure content to least is: chickens, pigs, dairy cows, and beef cows. Ammonia levels are typically 5–18 ppm in confinement swine barns, 3–8 ppm in open dairy barns, and 10–100 ppm in confined poultry facilities.
Below we present a table of human ammonia exposure limits:
| Agentura | Omezit Typ | Value (ppm) | Vystavení Trvání | Popis |
| OSHA | PEL- TWA | 50 | 8 hodin | Permissible Exposure Limit – legally enforceable standard |
| OSHA | STEL | 35 | 15 minuta | Limit krátkodobé expozice |
| NIOSH | REL- TWA | 25 | 10 hodin | Recommended Exposure Limit – advisory guideline |
| NIOSH | STEL | 35 | 15 minuta | Limit krátkodobé expozice |
| NIOSH | IDLH | 300 | Bezprostřední | Immediately Dangerous to Life or Health |
| ACGIH | TLV- TWA | 25 | 8 hodin | Threshold Limit Value – recommended guideline |
| ACGIH | TLV-STEL | 35 | 15 minuta | Threshold Limit Value – Short-Term Exposure |
| AIHA | ERPG-1 | 25 | Stav nouze | Minimal effects/mild, transient irritation |
| AIHA | ERPG-2 | 200 | Stav nouze | Serious health effects, ability to take protective action not impaired |
| AIHA | ERPG-3 | 1,000 | Stav nouze | Life-threatening health effects |
zkratky:
- OSHA: Správa bezpečnosti a ochrany zdraví při práci
- NIOSH: National Institute for Occupational Safety and Health
- ACGIH: Americká konference vládních průmyslových hygieniků
- AIHA: American Industrial Hygiene Association
- PEL: Permissible Exposure Limit
- REL: Recommended Exposure Limit
- TLV: Mezní hodnota prahu
- TWA: Time-Weighted Average
- STEL: Short-Term Exposure Limit
- IDLH: Immediately Dangerous to Life or Health
- ERPG: Emergency Response Planning Guideline
DESIGN

| 1 Sensor Head 2 Svítilna 3 Kontrolky 4 Backlit Screen 5 Flashlight Button 6 Levé tlačítko |
7 Pravé tlačítko 8 FUNC Button 9 Tlačítko napájení 10 USB-C nabíjecí port 11 Bzučák |
The FD-92-AMMONIA has five buttons:
| Logo | identifikace | 1 function definition |
| Klíč osvětlení | Turn the flashlight on and off | |
| OK | menu | On the home screen, tap to enter the menu. On the other screen, tap to confirm the function |
| ◀ | vlevo | Select Cursor up/Value, Option up |
| ▶ | právo | Select cursor down/Value, Option down |
| moc | Press and hold to turn on the machine when it is off. On the main screen ,Press and hold it to shut down; On the home screen, tap it to display the shortcut menu. On other screen, tap it to return |
The FD-92-AMMONIA has 3 operating LED mode indicators:
| označit | definice funkce |
| Working light (green) | Equipment in normal condition, no gas detected |
| Failure light (yellow) | The device is in faulty |
| Kontrolka budíku (červená) | Byl detekován plyn |
QUICK START – AMMONIA Detection
- Turn ON the detector. After device self-test the unit is READY.
- Start measuring. Real-time measurements are shown on the HOME screen in ppm concentration. PPM stands for “parts per million”.
- Move the sensor slowly at a inspection site. Ammonia gas levels will be shown on the display.
- The unit will flash GREEN LED in normal operating mode. When the alarm has triggered, RED LED will flash rapidly.
- By pressing the left or right button you can toggle between instantaneous levels (left image) and time series bar graph (right image).

ZOBRAZIT IKONY
| Logo | Jméno | Definice |
| kapacita baterie | Zobrazuje zbývající energii baterie | |
| varování | Display: prompt tone on/off; Blinking: The sound is in silent state |
|
| Vibrace | Display: Vibration prompts open; Hidden: Vibration prompts off |
|
| účtovat | Blinking: charging; Steady on: The charging is complete |
|
| Alarm/failure | Blinking red: The device alarms. Blinking yellow: The device is faulty |
When in the main screen, press OK to enter the Main Menu.
- Záznamy o poplachu: Shows recorded alarm triggers with time and date stamp. Triggers when low and high alarms are triggered.
- Nastavení budíku: Settings for low and high alarm points.
- Kalibrace: Settings for ZERO and Span Calibration.
- Nastavení systému: Allows to change the time, date, displays and alarm modality.
- Informace: General detector information.

The alarm record of the equipment includes alarm trigger events. The alarm record stamps the alarm trigger time, alarm type, gas type, alarm point, the starting value of gas concentration triggering the alarm, the maximum value of gas concentration after triggering the alarm, and the duration of the alarm.
Low Value: When the gas concentration exceeds this value, a low alarm will be triggered.
High Value: When the gas concentration exceeds this set value, a high alarm will be triggered.
Low Backlash: The low alarm hysteresis is a parameter that prevents frequent toggling of the alarm due to fluctuations near the low alarm value. A low alarm is triggered when the gas concentration exceeds the set value, but it will only be cleared when the concentration drops below the set value minus the low backlash value. For example, if the low alarm value is 80ppm and the low backlash is 5ppm, the alarm will only clear when the concentration drops below 75ppm.
High Backlash: A parameter that prevents frequent toggling of the alarm due to fluctuations near the high alarm value. A high alarm is triggered when the gas concentration exceeds the set value, but it will only be cleared when the concentration drops below the set value minus the high backlash value. For example, if the high alarm value is 90ppm and the high backlash is 5ppm, the high alarm will only clear when the gas concentration reaches 85ppm.
Co je KALIBRACE?
Your FD-92-AMMONIA comes already calibrated. However, calibration is an important function to be performed to ensure your gas detector operates accurately. We recommend annual calibration. Accuracy and Calibration drift can happen over time because of chemical degradation of sensors and the natural drift in electronic components. There are two parts to the calibration, ZERO Calibration and SPAN Calibration.
NULOVÁ KALIBRACE: Ensures a good baseline to ZERO target gas exposure. This ensures the detector reads a true ZERO. At times you may experience the unit is not reading exactly ZERO in fresh air. In this case, you can perform a ZERO calibration to readjust the ZERO point. Select ZERO and press Enter.
KALIBRACE ROZSAHU: Ensures accurate gas concentration reading in ppm. To undertake a span calibration, you need ammonia calibration reference gas, a gas regulator and tubing. This is a detailed and technical procedure and best described via our YouTube step by step tutorial found on our website under the main Calibration menu, then select FD-92.
Co je Bump Testing?
Bump testing is a quick procedure to expose the gas detector to a small amount of “blast” target gas to ensure the detector operates and alarms as programmed. The function of this test is to verify detection operation and build user confidence, particularly in hazardous and critical user applications. Recommended to bump test when first purchased and unpacking detector and before use. You can do this by exposing the gas detector to ammonia bump gas.
The system settings menu helps you adjust certain parameters of the gas detector for customization and a better user experience. Options include:
Datum a čas: Adjust the date and time to your local settings.
Zobrazit: Change screen brightness and auto sleep settings.
Oznámení: Toggle options for light, vibrator, and buzzer operation.
Obnovení továrního nastavení: ONLY do this if confirmed by our technical team.

Some basic gas detector information that may be required for identification and troubleshooting.
Informace o zařízení: Includes device name, software version, hardware version, and product ID.
Operational Status: Obsahuje baterii objtage, charge status, temperature, sensor ADC (Analog-to-Digital Converter), boot status, and uptime.
BATERIE SE NABÍJÍ
The FD-92-AMMONIA has a built-in lithium battery and can be charged via Type C USB cable. USB Charger should be rated >1.0A for fast charging.
Before charging, TURN OFF the analyzer to avoid any potential damage.
Charging takes about 4 hours. When active in charging, an animated battery icon will appear to indicate charging is in progress. When done, “Charging Complete” will appear.
MĚŘENÍ
Monitorování plynu: When the analyzer is in the ON state, it is presenting the live, continuously ammonia gas sensor concentration readings. The data displayed updates twice per second. Walk slowly from location to location to obtain various indoor ammonia gas concentration levels. To get a true reading, ensure unit is stationary for at least 2 minutes in one location. Beware, that ventilation and height can impact an ammonia reading, and rarely will one obtain consistent results.
Maximální koncentrace: When you have reached the maximum detection limit of the sensor, it will read “100”. When this occurs, seek fresh air otherwise the sensor can be damaged and poisoned.
Alarmující: The analyzer has LED, BUZZER and VIBRATION alarm modes.
These can be disabled.
VAROVÁNÍ
- Read, understand, and adhere to all instructions to ensure safe operation – failure to comply may result in serious injury or death from explosive gases.
- Incorrect calibration in contaminated areas may result in false readings.
- Do not store the detector with water, solvents, acids, or corrosive substances – avoid extreme temperatures, high humidity, electromagnetic fields, and intense sunlight.
- If detecting gas or feeling unwell, immediately evacuate the area and seek fresh air.
- Follow instructions carefully as the detector is highly sensitive to ensure accurate readings and personal safety.
- Ensure the analyzer is stored in a room temperature environment with moderate humidity, not exceeding 95%RH with no mechanical vibration.
- Ensure the environment is not corrosive, no chemical vapors.
Na tento produkt se vztahuje jednoletá omezená záruka.
This warranty does not cover damage resulting from accident, misuse, disassembly, abuse or lack of reasonable care of the product, or applications not in accordance with the user manual. It does not cover events and conditions outside of our control, such as Acts of God (fire, severe weather etc.). It does not apply to retail stores, service centers or any distributors or agents. We will not recognize any changes to this warranty by third parties.
Neneseme odpovědnost za žádné náhodné nebo následné škody způsobené porušením jakékoli výslovné nebo předpokládané záruky. S výjimkou rozsahu zakázaného platnými zákony je jakákoli implicitní záruka prodejnosti nebo vhodnosti pro konkrétní účel omezena na dobu 1 roku.
TENTO PRODUKT NELZE OPRAVIT, POKUD JE JEDNOTKA TAMPERED S TÍM ZRUŠÍ PLATNOST ZÁRUKY. POKUD JE JEDNOTKA VADNÁ, VRAŤTE JEJ PROSÍM SVÉMU PŮVODNÍMU DODAVATELI S DOKLADEM O NÁKUPU.
Copyright © 2025, FORENSICS LLC, všechna práva vyhrazena.
FORENSICS, FORENSICS DETECTORS jsou registrované ochranné známky společnosti FORENSICS LLC. Všechny ostatní ochranné známky, obchodní názvy, servisní značky a loga zde uvedené patří jejich příslušným společnostem.
PODPORA
Forensics Detectors has a dedicated support team. You can email our Chief Engineer directly at drkoz@forensicsdetectors.com nebo navštivte naši webstránky pro další informace.
Web: www.forensicsdetectors.com
E-mail: sarah@forensicsdetectors.com

FORENZICKÉ DETEKTORY™
www.forensicsdetectors.com
Dokumenty / zdroje
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FORENSICS DETECTORS FD-92-NH3 Basic Ammonia Meter [pdfUživatelská příručka FD-92-NH3, FD-92-AMMONIA, FD-92-NH3 Basic Ammonia Meter, FD-92-NH3, Basic Ammonia Meter, Ammonia Meter, Meter |
