Winsen 454B Refrigerant Gas Sensor User Manual

Winsen 454B Refrigerant Gas Sensor

Statement

• This manual copyright belongs to Zhengzhou Winsen Electronics Technology Co., LTD. Without the written permission, any part of this manual shall not be copied, translated, stored in database or retrieval system, also can’t spread through electronic, copying, record ways.

• Thanks for purchasing our product. In order to let customers use it better and reduce the faults caused by misuse, please read the manual carefully and operate it correctly in accordance with the
  instructions.

• If users disobey the terms or remove, disassemble, change the components inside of the sensor, we shall not be responsible for the loss.

• The specific such as color, appearance, sizes & etc., please in kind prevail. We are devoting ourselves to products development and technical innovation, so we reserve the right to improve the products without notice. Please confirm it is the valid version before using this
  manual.

• At the same time, users’ comments on optimized using way are welcome.

• Please keep the manual properly, in order to get help if you have questions during the usage in the future.

Introduction

• MH-441D-454B refrigerant sensor is an intelligent infrared gas sensor (hereinafter referred to as the sensor), which uses the principle of non-dispersive infrared (NDIR) to detect refrigerant (label 454B), which has good selectivity and no oxygen dependence ; The sensor is a compact high-performance sensor produced by combining mature infrared absorption gas detection technology with micro-machining and sophisticated circuit design. It is easy to use and can be directly used to replace the catalytic combustion element.

Features

• High sensitivity, high resolution, fast response
• Output method: UART, analog voltage signal
• Temperature compensation, excellent linear output, Excellent stability, Long lifespan
• Anti-poisons, anti-vapor interference, Can replace catalytic type gas sensor directly

Applications

• HVAC refrigeration,
• industrial-process control and safety protection

Main Parameters Table1

1. .Technical Parameters

0.4~2.0V DC (Require output by safety barrier)
Warm-up time| 3 min
Response time| T90<30 seconds
Working Temperature| -20°C ~ 60°C
Working Humidity| 0~95%RH (no condensation)
Sizes| Φ20×22.4mm
Weight| 35g
Lifetime| >5 years
Defense Grade| IP54
Power, communication terminal Intrinsic safety| Ui=7.5VDC, Ii=265mA, Pi=0.5W, Ci=10 μF, Li=0mH

.Measuring Range and accuracy

Target Gas| Molecular Formula| Measuring Range| Resolution| No. of decimal| Accuracy
---|---|---|---|---|---
454B| CH2F2(68.9%)| 0～5.00% Vol| 0.01% Vol| 2| ±5%F.S(0.00%-1.00%)
C3H2F4(31.1%)| ±10%F.S(1.00%-5.00%)

5.Struction Size (Tolerance of unmarked dimensions is ±0.2)

• Pin definition MH 441D

Analog Output

• Vout output range (0.4-2.0V ) stands for gas concentration(0 to full range) Connection: V+ –5V, GND- Power Ground, Vout-ADC input.
• After warm-up, Vout will show the voltage standing for the gas concentration. If self-checking detects a fault, the output voltage is 0V.
• Output concentration = Full range value * output voltage.

Intrinsically safe explosion-proof

• This product meets the standards of GB3836.1-2010 “Explosive Atmosphere Part 1: General Requirements for Equipment” and GB3836.4-2010 “Explosive Atmosphere Part 4: Equipment Protected by Intrinsically Safe “i”” standards”;
  the explosion-proof mark is Exib ⅡB T4 Gb, it is suitable for zone 1 and zone 2, contains Class IIA, T1-T3 explosive environment formed by the flammable gas, mixture of steam and air; it has passed the inspection by the National Quality Inspection Center for Explosion-

• proof Electrical Products and obtained the explosion-proof certificate. When using, please note the following:

• The intrinsically safe power supply must be used to power the sensor, otherwise the explosion-proof performance will be affected.

• It is forbidden to replace the sensor in dangerous places.

• It is forbidden to disassemble or replace the sensor element to avoid affecting the explosion-proof performance.

• It is not allowed to replace components or structures, so as not to affect the explosion-proof performance.

• The installation and wiring of the safety barrier must be carried out in accordance with the safety barrier instruction manual, and the safety barrier must obtain an explosion-proof certificate.

Connection diagram of intrinsically safe explosion-proof system
The on-site installation must comply with the relevant regulations of the GB3836.15—2000 “Electrical Equipment for Explosive Gas Environment Part 15: Electrical Installation in Hazardous Locations (Except Coal and Mines).

The distribution parameters of the connecting cable between the safety barrier and the sensor should meet:
Note:

• Uo: Maximum output voltage of safety barrier;
• Io: Maximum output current of safety barrier
• Po: Maximum output power of safety barrier
• Co: Maximum external capacitance of safety barrier
• Lo: the maximum external inductance of the safety barrier (see the safety barrier instructions for the above parameters book)
• Cc: Maximum allowable distributed capacitance of connecting cable
• Ui: sensor maximum input voltage
• Ii: Maximum sensor input current
• Pi: sensor maximum input power
• Ci: Maximum internal capacitance of the sensor
• Li: Maximum internal inductance of the sensor

Cautions for Maintenance

• 7.1 The sensor should be calibrated regularly. The suggested cycle time is 6 months.
• 7.2 Do not use the sensor in the high dusty environment for long time.
• 7.3 The sensor should be kept away from heat sources and away from direct sunlight or other thermal radiation. 7.4 Please use the sensor with correct power supply.
• 7.5 Forbid to weld the sensor pins directly.
• 7.6 Forbid to cut the sensor pins.

sales@winsensor.com
Website : www.winsen-sensor.com

References

• Winsen Gas Sensor_CO2 Sensor_Air Quality Sensor_Dust Sensor_CO Sensor-Winsen Electronics

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