Related Manuals for mPower Electronics VOXI MP812
Summary of Contents for mPower Electronics VOXI MP812
- Page 1 VOXI Fixed Photo-ionization Detectors MP812 & MP815 User’s Guide Rev 1.15 May, 2025...
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Page 2: Table Of Contents
VOXI User’s Guide Contents 1. General Information ....................3 1.1 Key Features ..............................3 2. User Interface ......................4 3. Installation........................5 3.1 Mounting ..............................5 3.2 Rain Cap ..............................6 3.3 Electrical Connections ..........................7 3.3.1 Baseline 4 mA Signal Adjustment ....................... 8 3.3.2 MODBUS Message RTU .......................... -
Page 3: Read Before Operating
VOXI User’s Guide Read Before Operating This manual must be carefully read by all individuals who have or will have the responsibility of using, maintaining or servicing this product. The product will perform as designed only if it is used, maintained and serviced in accordance with the manufacturer’s instructions. The user should understand how to set the correct parameters and interpret the obtained results. -
Page 4: General Information
VOXI User’s Guide 1. General Information The VOXI is one of the most advanced fixed monitors available for ppb (parts per billion) detection of VOC (Volatile Organic Compound). It operates on 12-30 VDC power and provides various outputs including OLED digital read-out, 4-20 mA analog output, RS-485 digital output, CAN or Modbus, 3 relays, and one port to an external strobe or horn. -
Page 5: User Interface
VOXI User’s Guide 2. User Interface The VOXI user interface consists of one large OLED Display showing the gas concentration, one status LED, two alarm LEDs, and various status icons. Calibration and other parameters are programmed using the mPower Suite mobile App on a smart-phone or tablet. High Alarm Status... -
Page 6: Installation
VOXI User’s Guide 3. Installation WARNING ! • The VOXI is currently not certified for use in hazardous gas locations. Install this unit only in an area known to be free of combustible gases and vapors. • Before installation, ensure that all power is disconnected. •... -
Page 7: Rain Cap
VOXI User’s Guide An optional mounting bracket (P/N M008-3004-000) is available that allows the unit to be offset about 1 cm from the wall or pole. 3.2 Rain Cap If mounted outdoors, the rain cap can be installed to further reduce the chance of precipitation ingress. -
Page 8: Electrical Connections
VOXI User’s Guide 3.3 Electrical Connections Two conduit holes are provided in the explosion-proof housing, one covered by a hex-head plug and the other for wire connections. To unscrew and remove the cover, first loosen the lock screw located on the side, using a Allen wrench. Pinch the buckles on both sides of the instrument assembly to release and then lift it out. -
Page 9: Baseline 4 Ma Signal Adjustment
VOXI User’s Guide 10 & 12, and terminal 11 is for the RS485 shielding line. The +V terminals 5 and 15 are equivalent and internally connected, as are GND terminals 11 and 14. 3.3.1 Baseline 4 mA Signal Adjustment If sending the 4-20 mA signal to a remote controller, during the field installation the VOXI analog output should be adjusted. -
Page 10: Modbus Rtu Functions
VOXI User’s Guide 3.3.2.2 Modbus RTU Communication Settings VOXI detectors support RS-485 communication, as a Modbus RTU. Mode: RTU Baud rate: 4800, 9600, 19200 (default 19200) Start bits: 1 Data bits: 8, LSB first Parity bit: none Stop bits: 1 Detector ID: 1~247 (default 136) 3.3.2.3 Modbus RTU Functions Detector supports function 0x03 (Read holding registers) only. - Page 11 VOXI User’s Guide MP8XX gas concentration data Read-only, signed integer (bit0~bit15). For example, 0x0024 low byte reading data = 0x12345678, this register returns 0x5678 Reading-only. High byte is Unit ID, low byte is decimal point (DP). For example, unit ID=2, DP=1, the register returns 0x0201.
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Page 12: Operation Overview
VOXI User’s Guide 4. Operation Overview 4.1 Standard Operation Once installed and power is turned on, the VOXI runs continuously to measure VOCs, display the concentration readout and any alarms (flashing LEDs), and send any output and alarm signals connected to external devices. The pump runs intermittently when VOCs are below 500 ppb, in order to extend the life of the filters and the pump itself, but runs continuously above this threshold. -
Page 13: Connecting The Voxi To The Mobile Device
VOXI User’s Guide 5.2 Connecting the VOXI to the Mobile Device The system communicates wirelessly using Bluetooth Low Energy (BLE) signals when within 10 m (33 feet) distance. 1. To connect start the App, click on to search for nearby devices, and click the device name. 2. -
Page 14: Field Service (Calibration, Etc.)
VOXI User’s Guide To enter the VOXI operations submenus, click on the device icon or the blank area to its right. VOXI operations include “Field Service”, “Settings” and “Operations (Log)”. The App automatically enters the "Field Service" screen. 5.4 Field Service (Calibration, etc.) VOXI field services include •... - Page 15 VOXI User’s Guide 5.4.1 Calibration 1. Initiate a Zero Calibration by clicking on the icon. When prompted, supply clean air to the inlet and click ‘Yes’ to start the count-down timer. If the VOXI is mounted in an area where ambient air contains detectable VOCs, provide a clean air source a) by attaching a ®...
- Page 16 VOXI User’s Guide 5.4.2 Configure Pump Stall Threshold This feature protects the pump from burning out if there is a flow blockage that is causing excessive strain on the pump. Click "Start Setting" to show the pump current draw. Then block the inlet and observe the current draw again. Enter the average value between the blocked and unblocked pump, and click "Set and Exit"...
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Page 17: Voxi Settings
VOXI User’s Guide 5.5 VOXI Settings In the Settings menu the user can adjust various parameters such as • Alarm limits • Span gas type and concentration • Measurement gas type • Measurement concentration unit • Modbus ID • Wireless baud rate NOTE: Firmware cannot be updated by the user. -
Page 18: View Operations Log
VOXI User’s Guide 5.6 View Operations Log Click "Operations" and select the date from the list at the bottom to view the daily operation log. -
Page 19: Operations By Handheld Remote Programmer
VOXI User’s Guide 6. Operations By Handheld Remote Programmer 6.1 Battery Installation Two AAA batteries are required but not included due to shipping limitations. To remove the battery cover, place the unit face down and use a thin tool such as a spatula to push down carefully at the hook positions and twist to pry the cover loose. -
Page 20: Menus And Sub-Menus
VOXI User’s Guide 6.3 Menus and Sub-menus Use the Up and Down arrows to scroll through the menu. Use the Right and Left arrows to enter or exit a menu item. When entering numerical values, use the left or right arrows to move the cursor, and the up and down arrows to increase or decrease the values, then press OK to save and exit. -
Page 21: Monitor Setup
VOXI User’s Guide 6.3.4 Alarm Set the numerical values for the low and high alarm limits. 6.3.5 Monitor Set-Up • Address is used in the MODBUS messaging protocol. • Baud Rate options are 4800, 9600 and 19200 bps and should be set to match that used in the MODBUS messaging protocol. -
Page 22: Maintenance
VOXI User’s Guide 7. Maintenance The VOXI requires regular filter replacement and possibly lamp & sensor cleaning if used in areas of high dust or condensation. The pump may also need service and the expected replacement period is about 2 years. 7.1 Replacing Filters If the external filter is dirty or clogged, remove it by unscrewing it from the inlet. - Page 23 VOXI User’s Guide 7.2.2 Lamp Cleaning and Changing 1. Remove the Sensor Cap and pull the sensor straight out, using a slight rocking motion if necessary. 2. Put on finger gloves and pull out the lamp. It may help to use fine tweezers;...
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Page 24: Sensor Cleaning
VOXI User’s Guide 7.2.3 Sensor Cleaning 1. Unscrew the sensor cover and pull the sensor straight out, using a slight rocking motion if necessary. 2. Put the sensor into a beaker and cover it with pure methanol or ethanol. It is not recommended to take apart the sensor for cleaning. For extreme fouling or corrosion, it is best to replace the sensor. -
Page 25: Pump Cleaning
VOXI User’s Guide Retaining pin 4. Unscrew the two screws holding the smaller PID/pump bracket to the larger main bracket. To access the screw underneath the pump, rotate the pump away on the pin still holding it in place. 5. Remove the bracket and lift the pump off the retaining pin. 7.3.2 Pump Cleaning Alignment Alignment... -
Page 26: Troubleshooting
VOXI User’s Guide 8. Troubleshooting Problem Possible Reasons & Solutions Reasons: Dirty filter(s). Dirty sensor module. Excessive moisture or water condensation. Incorrect calibration. Readings abnormally High Solutions: Replace filter(s). Clean or replace sensor module. Blow-dry the sensor module. Calibrate the unit. Reasons: Dirty filter(s). -
Page 27: Pump & Inlet Flow Troubleshooting
VOXI User’s Guide 8.2 Pump & Inlet Flow Troubleshooting 1. If the pump is not running, check that the pump power supply is connected properly. 2. Ensure that the external filter housing is properly installed and tightened 3. Check that the sensor module is properly seated Pump power Screw in... -
Page 28: Technical Specifications
VOXI User’s Guide 9. Technical Specifications All specifications are subject to change without notice. Please check for updates at www.mpowerinc.com... -
Page 29: Replacement Parts
VOXI User’s Guide 10. Replacement Parts Description Part Number List Price Bluetooth Remote Programmer for VOXI M008-0901-000 $99.00 VOXI Mounting Kit (incl. bracket, U-embrace hoop, screws, nuts, washers) M008-3004-000 $68.00 Rain Cap with exhaust hose barb M008-3015-000 $40.00 Gas outlet adapter, flowthrough, MP81X M008-3017-000-SRP $35.00 Lamp (10.6 eV, 3/8 inch dia.) for NEO and VOXI... - Page 30 VOXI User’s Guide Technical Support and mPower Contacts mPower Electronics Inc. 2910 Scott Blvd. Santa Clara, CA 95054 Phone: (408) 320-1266 Fax: (669) 342-7077 info@mpowerinc.com www.mpowerinc.com...
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