FORENSICS DETECTORS plt850 Multi Gas Detector Gas Meter User Manual

FORENSICS DETECTORS plt850 Multi Gas Detector Gas Meter

Product introduction

portable voice type multi gas detector is a safety device that can continuously detect the concentration of leaking gas. It adopts advanced integrated circuit technology, embedded computer control, high-quality imported gas sensors, with excellent sensitivity and repeatability. It uses dot matrix LCD display to support Chinese-English interface and Chinese- English voice prompt, so that users can quickly understand the product and use and maintain it simply. High-strength engineering plastics, good seismic resistance, high strength, high-grade atmospheric appearance and dust-proof, waterproof and explosion-proof function, etc.
The detector is widely used in petroleum, chemical industry, environmental protection, metallurgy, refining, gas, biochemical medicine, agriculture, fire protection, Archaeology and other industries and places that need safety monitoring for toxicity and harmfulness, explosion prevention. The detector can effectively predict the concentration of dangerous gases and alarm, so as to ensure the safety of workers and production equipment.

Structure introduction

Structure

Working principle

Electrochemical and catalytic combustion

Technical parameter

Other gas type please contact us.
Precision:| :S ±5%FS
Response time| T<30s
Display:| LCD display real-time data and station of system
Alarm:| Audible-visual-vibration alarm with voice alarm
Work| -20 ‘C -so·c ; <95%RH non-condensing
Power supply:| DC3.7V (Rechargeable lithium batteryl800mAh)
Explosion-Proof grade:| ExibIIBT3Gb
Battery charge time:| 4h-6h
Working time:| Over 10 hours
Sensor life:| 2 years
Protection grad| Ip65
Dimensions:| 140mm x73mm x32mm
Weight:| 300g

Function and operation

Turn on, Turn off, Charging

a Turn on

When the detector is off, press and hold the middle power button for about 3 seconds, release the button when the LCD screen displays the software version interface, and the indicator light flashes twice, at this time, the LCD screen displays the boot welcome page, and you can hear the voice prompt “Welcome to use multi-function voice gas detector”

Keep the air around the detector clean on the page waiting to be turned on. During the startup process, the detector will perform vibration and light self-test, please pay attention to observe whether it is normal. The above status is normal, indicating that the sound, display, light, and vibration self-test pass

After the boot is completed, the normal gas main surface can be displayed, and the real-time gas concentration can be seen. Press the left button to view the system status information.

b  Turn off

Keep the air around the detector clean on the page waiting to be turned on. During the startup process, the detector will perform vibration and light self-test, please pay attention to observe whether it is normal. The above status is normal, indicating that the sound, display, light, and vibration softest pass.

c Charging

The USB charging cable is plugged in when the detector is in shutdown mode, the current power will be displayed on the screen, when there is only one grid left, the LCD will pop up a low battery page every 60 seconds, and there has a voice indicating “Low battery, please charge”. When the battery is less than 1 grid, the detector will automatically shut down to prevent data loss inside the detector and unpredictable damage caused by insufficient voltage on the internal sensitive components of the instrument.

Function setting

The menu of detector contain as follow: Alarm Record, Set Low Alarm, Set High Alarm, Zero Adjust, Calibrate Gas, Set Time, Set Backlight, Set Password, press Right key, then input the password, default password is 1111

Then you will get the menu.

Alarm Record

Under the menu list choose the Alarm Record, press power key then you can find the alarm record data; View the data by press Up or Down key; Press the power key, switch to the option page, clear all records by selecting “delete”, or select “return”: return to the record query page; “exit”: return to the main menu.

Set Low Alarm

Under the menu list choose the Set L Alarm, press power key then you can enter the setting interface; you can select the channels of combustible gas, oxygen, hydrogen sulfide and carbon monoxide by up and down keys; after selecting the channels you need to set, press the power key to enter the page of setting low alarm concentration; The alarm

concentration can be adjusted according to the Up and Down, and after the Yes key is pressed, the alarm is saved.

Set High Alarm

Under the menu list choose the Set H Alarm, press power key then you can enter the setting interface; you can select the channels of combustible gas, oxygen, hydrogen sulfide and carbon monoxide by up and down keys; after selecting the channels you need to set, press the power key to enter the page offsetting high alarm concentration; The alarm concentration can be adjusted according to the Up and Down, and after the power keys pressed, the alarm is saved.

Zero Adjust

Under the menu list choose the Zero Adjust, press power key then you can enter the setting interface; you can select the channels of combustible gas, oxygen, hydrogen sulfide and carbon monoxide by up and down keys; after selecting the channels you need to set, press the power key to enter the page of zero adjust interface. The data is your gasconcentration, after the Yes key is pressed, the alarm is saved.

Warning You must do this in the clean airshed O2 must adjust in the N2 gas environment ,ensure there is undetected gas in the air. Or the detect value will be wrong！

Cali Gas

Prepare gas cylinders, pressure limiting valves, flow meters, gas pipes, and calibration hoods before calibration. When the arrow in menu selection bar points to the calibration setting, press the middle confirmation key to switch to the interface for selecting the calibration setting channel; you can select the combustible gas, oxygen, hydrogen sulfide, and carbon monoxide channels by the “▲” and “▼” keys; After choosing the setting channel, press the OK key to enter the calibration setting page;
Open the pressure limiting valve of the cylinder with the standard concentration, and adjust the flow to 200-400ml/min. connected to our gas detector through a gas pipe and a calibration gas hood. observe the AD value displayed on the instrument, at this time, the AD value should be rising, wait for about 1 minute for the AD value to rise to the peak value and be stable and not floating. Use “▲” and “▼” to adjust the concentration value of the calibration gas. For example, the carbon monoxide concentration of the gas cylinder is 250 ppm, you need to adjust the concentration value displayed on the instrument to 250 ppm. Click OK to save. Calibration successful.

Warning : Non professional personnel are strictly prohibited from carrying out this operation, otherwise all consequences will be borne by themselves. The tester has been calibrateduniformly when it is out of the factory. If the user wants to recalibrate, pleasefollow the steps strictly, first set the zero point, then re-calibrate the settings. If the user fails to operate this setting, please contact the manufacturer back in time for calibration.

Set Time

Under the menu list choose the Set Time, press power key then you can enter the setting interface; Modify the date by press Up or Down key. After modified press the save is ok.

Set Backlight

Under the menu list choose the Set Backlight, press power key then you can enter the setting interface; Modify the type by press Up or Down key. After modified press the save is ok. Auto: the light will keep for 30 second; Normally on: the light will always be working

Set Password

Under the menu list choose the Set Password, press power keythen you can enter the setting interface; Before modify thepassword, you need to validate the password first, then you canchange it

The default password is 1111

Attention: please save the password properly. Once lost, it canonly be returned to the manufacturer to resume the factorysettings.

Channel Info

Down to choose the gas type, will display the gas name, lowalarm, high alarm, detecting range.

Language

Under the menu list choose the Set Language, press power key then you can enter the setting interface;

Use

When the detector is turned on, the LCD screen is in the stand by state of displaying four concentrations of EX gas, O2, H2S and CO in real time

EX alrm

When the concentration of EX gas is detected to be higher than the low alarm value set by the system, the detector will broadcast the voice “Please note that the concentration of EXgas exceeds the standard” and continue to simulate the alarm sound; the alarm lamp above the detector and the internal vibration motor will be turned on simultaneously; When the alarm value is low, the voice light and vibration alarm states disappear.

alarm

When the concentration of O2 is detected to be lower than the low alarm value set by the system, the detector will broad cast the alarm signal “Please note that the concentration of oxygenic too low”, which is higher than the high alarm threshold set by the system. The detector will broadcast the alarm signal “Please note that the concentration of oxygen exceeds the standard” and always simulate the alarm sound; the alarm light on the detector will voice the alarm signal. When the concentration of O2 gas is monitored by the detector and restored to the normal value, the alarm state of voice, light and vibration disappears.

Note: O2 concentration in normal air is 20.9%. Users can adjust the value of low and high alarm according to actual needs.

H2S alarm

When the concentration of H2S gas is detected to be higher than the low alarm value set by the system, the detector will broadcast the voice “Please note that the concentration of H2Sgas exceeds the standard” and continue to simulate the alarm sound; the alarm lamp above the detector and the internal vibration motor will be turned on simultaneously; When the alarm value is low, the voice, light and vibration alarm states disappear.
CO alarm
When the concentration of CO gas is detected to be higher than the low alarm value set by the system, the detector will broadcast the voice “Please note that the concentration of CO gas exceeds the standard” and continue to simulate the alarm sound; the alarm lamp above the detector and the internal vibration motor will be turned on simultaneously; When the alarm value is low, the voice, light and vibration alarm states disappear.
Alarm data storage
After the detector triggers the alarm, when the detection alarm gasrestores to the normal threshold set, the detector will save the current alarm information to the internal storage of the detector,  and according to the user set low concentration alarm threshold, high concentration alarm threshold can be divided into low and high alarm. The user can search through the alarm in the menu.

Note The alarm voice support Chinese or English, as same as the language you choose.

Warning：

1.  The detector only alarm when it is detecting;
2.  Do not charging detectors at the gas monitoring site to avoid fire ore plosion caused by sparks during the plugging process.
3.  Try not to charge the detector on startup, so as not to affect charging speed.。

The detector has the function of intelligent tracking zero point.
Please turn on under the condition of clean air.。

Notes

1. Prevent the detector from falling down or being subjected to severe vibration.。
2. In the presence of high concentration gas, the detector may not be used normally.。
3. Please strictly operate and use according to the instruction manual, otherwise it may cause the test result to be inaccurate or damage the detector.。
4. This product should not be stored or used in environments containing corrosive substances (such as chlorine of relatively high concentration) or in other harsh environments, including too high or too low temperature, high humidity, electromagnetic field and strong sunlight exposure。
5. If there is dirt on the surface of the instrument after long-term use, please gently wipe it with clean soft cloth dipped in water. Do not use corrosive solvents and hard materials to wipe the surface of the machine. Otherwise, it may lead to scratches or damage on the surface of the instrument.
6. In order to ensure the accuracy of detection, the detector should be calibrated regularly, and the verification period should not exceed 1 years.。
7. Please unload the lithium batteries and sensors of the discarded portable gas detector and send them to the designated location or return to our company. Do not throw them into the garbage can at will。
8. Any failure or failure to be described in this manual should be contacted with our company for settlement.。
9. In the explosive gas environment, the battery pack can not be dismantled or replaced, nor can the battery pack be charged. Inexplosive gas environment, peripheral plug-in devices without explosion-proof certification can not be used, nor can sensors be replaced. 10. This product has obtained explosion-proof certification. Users are not allowed to change or change the components or structures affecting explosion-proof performance without permission.。

Common faults and Solutions

setting time
Strong electromagnetic| Re-setting time
Set zero fault| The sensor zero drift too high| Calibrate it or change sensor
---|---|---
After detection the value not back to 0（exce pt O2 ）| Zero drift| Zero calibrate
Detector display whole range| Sensor bad| Change new sensor

Storage

The detector should be stored in the ventilation room Witham ient temperature -10 to 55℃ and humidity <85%. Avoid direct sunlight, and air can not contain harmful gases or impurities that are corrosive to the detector.

Package

Appendix – Sensor Selection Table

Gas to be measured| Measuring range| Optional range| Resolution| Alarm point
---|---|---|---|---
EX| 0-100%lel| 0-100%vol| 1%lel/1%vol| Low：20

High：50 %vol

O2| 0-30%vol| 0-30%vol| 0.1%vol| Low：19.5%

High：23.5%vol

H2S| 0-100ppm| 0 50/200/1000ppm| 0.1ppm| Low：10 High：35ppm
CO| 0-1000ppm| 0-500/2000/5000 ppm| 1ppm| Low：50 High：150ppm
CO2| 0-5000ppm| 0-1%/5%/10%vol| 1ppm/0.1%vol| Low：1 000

High：2000ppm

NO| 0-250ppm| 0-500/1000ppm| 1ppm| Low：50

High：150ppm

NO2| 0-20ppm| 0-50/1000ppm| 0.1ppm| Low：5 High：10ppm
SO2| 0-20ppm| 0-50/1000ppm| 0.1/1ppm| Low：5 High：10ppm
CL2| 0-20ppm| 0-100/1000ppm| 0.1ppm| Low：5 High：10ppm
H2| 0-1000ppm| 0-5000ppm| 1ppm| Low：50 High：150ppm
NH3| 0-100ppm| 0-50/500/1000ppm| 0.1/1ppm| Low：20 High：50ppm
PH3| 0-20ppm| 0-20/1000ppm| 0.1ppm| Low：5 High：10ppm
HCl| 0-20ppm| 0-20/500/1000ppm| 0.001/0.1ppm| Low：5 High：10ppm
CLO2| 0-50ppm| 0-10/100ppm| 0.1ppm| Low：5 High：10ppm
HCN| 0-50ppm| 0-100ppm| 0.1/0.01ppm| Low：10 High：20ppm
C2H4O| 0-100ppm| 0-100ppm| 1/0.1ppm| Low：20 High：50ppm
O3| 0-10ppm| 0-20/100ppm| 0.1ppm| Low：2 High：5  ppm
CH2O| 0-20ppm| 0-50/100ppm| 1/0.1ppm| Low：5 High：10ppn
HF| 0-100ppm| 0-1/10/50/100ppm| 0.01/0.1ppm| Low：2 High：5  ppm
C7H8/C8H10| 0-20ppm| 0-1/10/50/100ppm| 0.01/0.1ppm| Low：5 High：10  ppm

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