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Key points for selection
First check the sensor driving capability and input signal, and then confirm the RS232, RS485, Bluetooth, Zigbee, AC110 ~ 220V 50/60Hz built-in lead-acid battery 4V4Ah and display and control requirements.
Product overview
MV-WI0007 is an economical weighing indicator. The page is organized based on this single product information page and is used for procurement preliminary selection, replacement verification and project interface confirmation. Display 6-digit 20mm LED or 25mm LCD with backlight; accuracy class III; AD conversion Σ-△ conversion method, 24bit; input signal range -7mV ~ 12.8mV; resolution display 15,000 internal code 1,000,000; minimum resolution 1μV/e; bridge supply voltage 3.3V DC; sensor interface 4-wire system, 1 ~ 4 350Ω analog sensor; working power supply AC110 ~ 220V 50/60Hz built-in.
Applicable scenarios and purchasing value
Used for display, calibration and data output of bench scales, platform scales, hopper scales, batching or weighing equipment. Interfaces, driver capabilities, display resolution and power supply methods will directly affect system integration and later expansion.
This page is organized according to a single product. The parameters and pictures are from the corresponding information page of the product and are not spliced with other models. Items with unclear information will be marked as order confirmation items.
Technical parameters
| show | 6-digit 20mm LED or 25mm LCD with backlight |
|---|---|
| accuracy class | Ⅲ |
| AD conversion | Σ-△ conversion method, 24bit |
| Input signal range | -7mV ～ 12.8mV |
| resolution | Display 15,000 code 1,000,000 |
| minimum resolution | 1μV/e |
| supply bridge voltage | 3.3V DC |
| sensor interface | 4-wire system, 1 to 4 350Ω analog sensors |
| Working power supply | AC110～220V 50/60Hz built-in lead-acid battery 4V4Ah |
| Usage environment | Working temperature -10℃～ +40℃, relative humidity ≤ 85%RH |
| Battery life | 50 hours (continuous operation, load 4 350Ω analog sensors) |
Selection steps
- Identify the number of sensors, impedance, wire system and input signal
- Determine display graduations, refresh speeds and control tasks
- Matching power, communication, analog, relay and printing interfaces
- Check installation openings, enclosure and site temperature and humidity
- Agree on calibration, communication protocol and acceptance items
Installation and commissioning suggestions
- Sensor lines and power lines are laid separately
- The shielding layer is single-ended or grounded according to the system plan or in a specified manner.
- Back up the calibration parameters first and then adjust them
- Test communications, alarms and power outage recovery item by item
FAQ
What interfaces does MV-WI0007 support?
The interfaces or outputs summarized on this page are RS232, RS485, Bluetooth, and Zigbee. Some of these functions may be optional and should be confirmed item by item when making an inquiry.
How many load cells can be connected?
It should be based on the driving capability and bridge impedance. The relevant parameters in this model information are: confirm according to the specific version.
How to choose working power supply?
The power supply conditions marked in the data are AC110 ~ 220V 50/60Hz built-in lead-acid battery 4V4Ah. The site should also confirm requirements for grounding, battery backup, and data retention after a power outage.
How to choose between RS232, RS485 and 4~20mA?
RS232 is suitable for short-range point-to-point, RS485 is suitable for multi-point and long distance, and 4~20mA is easy to access the analog system; it is finally determined according to the PLC, DCS or host computer interface.
Is the display resolution equal to the system accuracy?
Not equal to. The system accuracy is also affected by the sensor, mechanical structure, calibration weight, eccentric load, temperature drift and installation. The number of display digits cannot alone be used as an accuracy promise.
Can it be used for batching or weight control?
It is necessary to confirm the relay, switching value, control logic, refresh speed and failure status. Only weight display does not mean complete control function.
Can the wireless communication distance directly copy the sample value?
No. The sample distance is usually based on specific conditions. Metal obstruction, co-channel interference, installation height and antenna position will all affect the on-site effect.
What parameters need to be checked when replacing old instruments?
Check the sensor wire system, excitation voltage, input signal, driver quantity, opening size, power supply, serial port protocol and calibration data.
How to carry out arrival and commissioning acceptance?
Check the model and interface, and complete no-load, standard load, eccentric load, communication, alarm, power-off recovery and printing or data upload tests.
What is needed for the request for quotations?
Provide the number and impedance of sensors, range and graduation value, power supply, display mode, output interface, number of control points, installation method and explosion-proof or waterproof requirements.
Ordering instructions
When ordering, please indicate the sensor quantity and impedance, range and graduation value, power supply, display, communication/analog/relay, printing, installation method and explosion-proof and waterproof requirements; interfaces marked as optional must be written into the order.
