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METRAVON MV-WI0008 is a low-power weighing indicator for bench and platform scales using one to four 350 ohm analog load cells. It operates with a 3.7 V, 2 Ah lithium battery or a DC 5 V supply. RS232 is an option, not a connection to assume on every unit; specify it when the scale must send weight data to another device.
Match the indicator to the bridge signal
| Input and display specification | MV-WI0008 |
|---|---|
| Analog input range | -7 to 12.8 mV |
| Load-cell excitation | 3.3 V DC |
| Sensor connection | 4-wire |
| Listed bridge load | 1-4 sensors, 350 ohm each |
| A/D conversion rate | 10 conversions per second |
| Display choices | 6-digit, 25 mm LED or backlit LCD |
| Display resolution | 15,000 divisions |
| Operating environment | -10 to +40 C; up to 85% RH |
Check the load-cell sensitivity and excitation requirements against the 3.3 V bridge supply and input range. For a replacement, record the old terminal assignments before choosing a wiring arrangement. A six-wire sensor installation needs a documented connection plan for its sense conductors; the four-wire input must not be treated as an interchangeable six-wire interface.
Plan battery operation around the actual shift
The catalogue reports 25 hours of continuous operation while driving four 350 ohm analog sensors. Use that stated test condition as a reference, not a guaranteed runtime for every installation. Display choice, battery condition and operating settings need to be represented in an endurance test before the scale is accepted for a full shift.
Choose LED or backlit LCD according to readability at the workstation. Include the charging or DC supply arrangement and the required U-bracket in the quotation. The bracket is optional. Temperature and humidity limits do not establish an IP rating, so a washdown installation requires separate enclosure confirmation.
Order data output only when it is needed
The optional RS232 interface has selectable rates from 600 to 9600 bit/s. Identify the receiving instrument, computer or printer and obtain the output format and connector assignments for the supplied version. A serial port does not establish Modbus RTU support or compatibility with a particular printer.
For an installation that needs relay outputs and process-control integration, compare the MV-WI0009 weighing controller instead of assuming those functions are included in this battery-powered indicator.
Battery-scale questions
Q1. Do 15,000 display divisions define the scale's accuracy?
They describe the display resolution, not the error of the assembled scale. Select capacity and division size using the sensor specification, mechanical installation and required weighing tolerance. Verify zero return, repeatability and response at different load positions with suitable reference loads after assembly.
Q2. Is 10 conversions per second the serial update rate?
It is the listed A/D conversion rate. Filtering, display behaviour and the serial output mode are separate settings or functions. If a host requires a particular update interval, measure the received data timing with the intended configuration rather than deriving it from the conversion figure alone.
Request an MV-WI0008 configuration and price with the load-cell model and count, scale capacity, division size, preferred display and shift duration. Add the receiving device details if RS232 or printing is required, and identify the supply and mounting accessories that must be included.
