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User Guide for mPower Electronics models including: MP84X Series Toxic Gas Transmitters, MP84X Series, Toxic Gas Transmitters, Gas Transmitters
4 days ago — Quick Start Guide. *The ground wire must be connected to the VOXI housing reliably. We recommend using AWG11 as ground wire. Power. LED. Alarm. LED. PN: M024 ...
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DocumentDocumentVOXI EC
MP84X Series Quick Start Guide
mPower Electronics Inc.
2910 Scott Blvd. Santa Clara, CA 95054 www.mpowerinc.com info@mpowerinc.com
Read Before Operating
The VOXI EC User's Guide 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.
Warnings
· Never operate the monitor when the cover is removed. · Remove the monitor cover only in an area known to be non-
hazardous. · Use only mPower's sensor and accessories. Substitution of
components will impair intrinsic safety and void warranty. · For optimal results, it is recommended to allow the unit to
warm up for 2 minutes after entering the test interface. · For maximum safety, the accuracy of the instrument should be
checked by exposing it to a known concentration calibration gas at regular intervals. · Ensure that the gas inlet is not blocked. · Ensure that all filters are clean and replaced on a regular basis. · Remove the sensor only if necessary for repair. Zero and span calibration are required once the sensor is moved.
Mounting Mount the VOXI EC to a wall or pole using the bracket and pole loops provided.
PN: M024-4002-000
v1.21
User Interface The user interface of the VOXI EC has an LCD graphic display and LED indications. The operations are controlled using an IR romote programmer.
1 Wiring Diagram
Chemical Sensor Type
Alarm LED
Power LED
Conduit Port for Wiring
Grounding Point*
Fault LED
Concentration Display
Grounding Point*
Mounting Slot
Rain Cap
Gas Inlet
*The ground wire must be connected to the VOXI housing reliably. We recommend using AWG11 as ground wire.
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1 2 3 4 5 6 7 8 9
Low Alarm Contacts High Alarm Contacts Fault Alarm Contacts
Norm. Open
Com
Norm. Norm. Closed Open
Com
Norm. Norm. Closed Open
Com
Norm. Closed
10 11 12 13
14
RS485B RS485A 4-20 mA -V +V (10-30V, <1W)
15 16
17
18
19
Strobe/Horn Strobe/Horn Strobe/Horn +V -V Fault Alarm Low Alarm High Alarm
(reserved) (reserved) (reserved)
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Start Up After supplying 10-30V power, the VOXI EC enters a self-test process. Biased sensors, like NO and lead-free O2, require a few hours stabilization time. When the startup is complete, the sensor type and concentration readings are displayed. Sampling is by diffusion. If any alarm level is exceeded, the Alarm LED flashes and the display backlight changes color.
Infrared Remote Programmer The Remote Programmer uses a CR2025 3V battery and communicates with the transmitter from up to 3 m (10 ft). when directed straight at the transmitter display (instead of from an angle).
Main Menu Access
Cancel
Confirm
Left or Right Cursor Movement
Menu Up or Down Scrolling
Number Increase or Decrease
Zero Calibration
Span Calibration
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Programming Interface
Programming Interface
The VOXI EC switches to a programming display
Enter the main menu, then enter the password
when initiated by the infrared Remote Programmer.
· Enter Menu
Press the Menu Access key and enter the password.
Use the up/down keys to increase or decrease numbers
and left/right keys to move the cursor. After entering
the last digit move the cursor to the "?" and press OK
to enter the menu.
· Basic vs Advanced Menus
The default Basic password ("0000") gives access
to the most common functions such as zero calibration,
span calibration, calibration gas concentration setting,
Scroll through the Menu
high/low alarm settings. For more advanced features
including concentration units, site ID, baud rate, etc.
enter the Advanced password given in the full User
Manual.
· Enter Selection
Use the up/down keys to scroll through the menu, and the OK key to select the item.
Exit the Menu
· Exit
To exit a sub-menu, press Cancel . To exit the
Main Menu, scroll to the "EXIT" menu and press OK
to return to the reading display.
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Zero Calibration Zero calibration must be done with clean air. If the ambient air is suspected of having a background of detectable chemical, use pure air or nitrogen from a cylinder to ensure a proper zero. To apply gas, attach the calibration adapter, as shown to the right. If no calibration adapter is available, the rain cap can be used as an alternative.
· Enter the main menu, scroll to CAL ZERO, apply zero gas (if needed) and press OK to start the zero calibration.
· Alternatively, press the short-cut "Zero" button on the programmer front panel to go directly to zero calibration.
· A 30-second countdown is initiated, after which Pass or Fail is displayed.
· To abort, press . · Oxygen sensors use ambient air to set the 20.9%
value during "zero" calibration and 0% O2 (100% N2) during "span" calibration.
Span Calibration · Enter the main menu, scroll to CAL SET to check that the
span is set to the same value as the gas cylinder. · Connect the calibration gas, start the gas flow (0.5 LPM
preferred), scroll to CAL SPAN and press OK. · Or, press the "Span" button on the programmer front
panel to go directly to span calibration. · A countdown timer is started with length
depending on sensor type, after which Pass or Fail is displayed. · To abort, press .
Span Gas Setting Enter the main menu, scroll to CAL SET, and press OK. Adjust the span gas concentration using the up & down keys and move the cursor using the left & right keys. After the setting is complete, press OK to save.
Sensor Replacement · Remove the Rain Cap and unscrew the Sensor Cap.
Remove the 3 filter pieces, and pull out the sensor module. · Insert a new sensor and reassemble in reverse order.
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