VOXI MP820 Combustible Gas Transmitter Instruction Manual
- June 1, 2024
- VOXI
Table of Contents
VOXI MP820 Combustible Gas Transmitter
The VOXI LEL MP820 is a point-type combustible gas transmitter designed modularly with smart sensor technology and an integral flameproof enclosure for fixed applications. The versatile platform offers catalytic combustible- gas sensors with auto-zeroing and offline calibration. Three-wire 4-20 mA analog and RS485 digital signal outputs are standard, while wireless output is optional. Various applications include oil & gas, petrochemical, chemical, metallurgical, pharmaceutical, semiconductor, environmental monitoring, and other industry facilities.
Features, Functions and Benefits
- Supporting catalytic combustion (LEL) sensor modules with sensor identification and manufacturing data
- Sensor diagnosis, temperature compensation and auto-zeroing
- LCD with backlight color varying according to alarm status
- Calibration due date
- 3 wires for 4-20 mA and RS485 ModBus output
- Infrared remote programmer for settings, calibrations and adjustments
- Error codes for easy troubleshooting
- Recoverable factory settings
- IP67 rating
- IECEx certification
- Optional ISM 915MHz modem for wireless connectivity at no subscription fee
Specifications
Detector Specifications
| Size | 8.9 x 5.9 x 4.9 in (226 x 150 x 125 mm) |
|---|---|
| Weight | 5.7 lbs. (2.6 kg) |
| Sensors | Catalytic combustion (LEL) sensor modules |
| Calibration | Two-point calibration (zero & span) |
| Response Time | 15s t90 |
| Temperature | -40° to +158°F (-40° to +70°C) |
| Humidity | 10% to 95% Relative Humidity (non-condensing) |
| Pressure | 86 to 106 kPa (0.85 to 1.05 atm) |
| Power | <5W; 10-30 VDC supply |
| Sampling | Diffusion |
| Display | 4-digit segmented LCD |
| Configuration | Via remote infrared programmer |
| Outputs | Analog: 4-20 mA (3 wires) Digital: RS-485, ModBus 3 Relays |
Wireless ISM 915MHz (optional) 1 mile line of sight
Alarms| LCD & LED flashing, relays for external alarm devices
Housing| Explosion-proof aluminum alloy
Housing Entries| 4 Conduit entries ¾” NPT 1 Port M28x1 fitting
Installation| Pipe bolt and wall mount
IP Rating| IP-67
EMI/RFI| Compliant with EMC Directive 2014/30/EU
Safety Certifications| IECEx
Ex db IIC T6 Gb (non-Wireless) Ex tb IIIC T80°C Db (non-Wireless) Ex db ia IIC
T6 Gb (Wireless) Ex ia tb IIIC T80oC Db (Wireless) CNEX
Ex d IIC T6
Installation| Pipe holding, wall mount
Warranty| 2 Years
Standard
- Gas Transmitter with Sensor installed
- Rain Shield & Calibration Cap
- Infrared Remote Programmer
- Mounting Parts
- Quick Start Guide
- Calibration Certificate
Optional
- ISM 915 MHz Modem with Antenna
Sensor Options
| Sensor | Range | Resolution |
|---|---|---|
| LEL (Combustibles) | 0-100%LEL | 1%LEL |
| LEL-F (Combustibles with Filters) | 0-100%LEL | 1%LEL |
Dimensions in mm [inches]
Power and output connections
- Due to ongoing research and product improvement, specifications are subject to change without notice *
Customers Support
Santa Clara
Houston
Shanghai
www.mpowerinc.com
HQ Office: 408-320-1266
1-866-mPower7
