The WMC-2000 ultrasonic level gauge is a machine that draws on the strengths of various level gauges both domestically and internationally. A universal level gauge that realizes the concept of full digitization and humanized design, with complete level measurement and control functions. Data transmission function and human-machine communication function. The main chip adopts imported industrial grade microcontrollers, digital temperature compensation, and wide voltage input voltage stabilization... related specialized integrated circuits. It has strong anti-interference ability, can freely set upper and lower limit nodes and online output adjustment, and is equipped with on-site display, analog quantity, switch quantity, and RS485/232 output, which can be easily connected to the host. This machine is equipped with an enhanced nylon waterproof shell. Due to its non-contact detection method, it is more hygienic than other instruments and more resistant to harsh environments such as humidity, dust, high temperature, and corrosive gases. It has the characteristics of high reliability, no pollution, stable performance, and low price. Therefore, it can be widely used in various fields related to level, material level, and liquid level measurement and control.

Characteristics of WMC-2000 Ultrasonic Level Gauge
Wide voltage adaptation range, capable of operating within a DC voltage range of 12-36V.  
It has the function of manually restoring factory settings.  
Can be used for difference setting, directly for measuring material level and liquid level.  
After setting the specific gravity parameter, the weight inside the container can be directly displayed.  
Two sets of limit control outputs (optional AC1A/380V SSR or NPN collector open circuit mode) are set for material level and liquid level control (optional).  
It has 4-20mA current output, RS485 serial data output or 0-5V voltage analog output (to be selected when ordering).  
When selecting current or voltage output, the output range can be adjusted arbitrarily.  
Select PC serial port output and conversion attachments, which can be directly connected to the PC unit network.  
It has a value-added/differential distance measurement mode selection, which can measure both distance and object level.  
It can automatically turn off the display during work to save overall power consumption.  
It has a pulse intensity of 1-15 levels and can be set according to operating conditions.  
It has the function of freely setting the starting and ending points of the full range.  

Technical parameters
Range: 1-15m (to be selected during ordering) Blind spot: 0.3-0.5m
Output: 4-20mA (other methods are optional)
Operating frequency: 20-200KHz (varies depending on model specifications)
Maximum load impedance:>300 Ω Minimum display resolution: 1mm
Accuracy (under standard experimental conditions): ± 0.3% x maximum range (± 1CM)
Working temperature: room temperature Working pressure: atmospheric pressure
Display: Four digit eight segment 0.5 inch LED digital tube
Keyboard: Three touch keys Shell: Reinforced nylon
Incoming cable: wire diameter 5-10mm × 1.5m
Installation method: External pipe thread M50 × 1.5mm
Dimensions: Φ 83 × 122 × Φ 47mm
Working voltage: DC12-36V Power consumption:<1.5W

Menu operation and parameter setting
1. Functions of each key
A: Menu and page keys
B: Switch display, shift, save keys
C: Display selection (temperature/quantity) and parameter setting keys
After power failure, press and hold the "B" and "C" keys simultaneously to power on until "DAEA" is displayed, which can restore the factory settings.

2. Work menu operation



3. Debugging menu operation

Note:
L ＜ H: When the reading is less than L, the switch is turned on; when it is greater than H, the switch is turned off;  
L=H: When the reading is less than 1L (1H), one channel is connected and the other is disconnected. When the reading is greater than 1L (1H) and less than 2L (2H), two channels are connected and the other is disconnected. When the reading is greater than 2L (2H) and less than 3L (3H), all channels are disconnected. When the reading is greater than 3L (3H), three channels are connected and the other is disconnected;
L>H: If the displayed value is less than L and greater than H, the switch will be turned on, otherwise it will be turned off;
4. Menu Definition
1L:1 channel control output starts 1H:1 channel control output stops
2L: 2-channel control output starts 2H: 2-channel control output stops
3L: 3-channel control output start 3H: 3-channel control output stop
(This machine does not support 3-channel output)
DR: Local address number: Used for communication with the upper computer when multiple devices are connected online, with valid values ranging from 0 to 255.  
Bad: In the value-added detection mode, bad=0. In the difference detection mode, the bad value is the total height from the bottom of the container to the end face of the level gauge probe.  
F0: indication of the starting point of the measurement range; FS: Indication of the end point of the range. When it is less than "F0" or greater than 10% of "FS", an alarm is displayed
AL: Fine tuning coefficient for the starting point value of current or voltage output; AH: Fine tuning coefficient for outputting the endpoint value. (Valid values range from 0 to 9999)
BPS: Serial port baud rate 600-19200bPS, default value: 9600bPS
TR: Serial port mode selection: 0-continuous, 1-access (ASC Ⅱ), 2-access (IEEE-754)
CB: Temperature correction value. Default value: -3.5
DS: Display value correction.  
AR: Weight accumulation coefficient=[(length x width) or (bottom area)] x specific gravity
ST: Filter depth (1-15 optional), the larger the value, the slower the display change, and the more stable the measurement; Conversely, the faster. Default value: 8
PUL: Transmitting pulse intensity (1-15 optional). Default value: 5
F: Sensor frequency (non modifiable)
BL: Minimum blind spot setting. Default value: 0.200
POH: Display linear correction (non modifiable)

Installation method and precautions for use

1. The installation of this level gauge is simple. Simply drill a 50mm diameter circular hole at an appropriate position above the working surface, install it into the front end of the instrument and secure it with a shock-absorbing rubber ring. Tighten the nylon gong ring. To ensure the long-term efficient and stable operation of this instrument, it is recommended to use a DC regulated power supply with a voltage of 12-24V greater than 2W for power supply.  
2. For installation and wiring, please refer to the label on the inner cover of the level gauge. After debugging, be sure to press the "B" key to turn off the display to reduce power consumption (press the B key again to turn on the display), and then tighten the back cover to prevent water or dust from entering. When working in the field, please set up a sunshade above the level gauge to avoid direct sunlight and rain. Lightning protection measures should be taken for outdoor use.  
3. During installation, the end face of the ultrasonic sensor should be repeatedly adjusted to be perpendicular to the target measured plane or liquid level. The distance between the probe and the measured surface should be determined based on the maximum distance change of the measured surface, the blind zone of the level gauge, and the range of the probe.  
If measuring liquids with other impurities such as sewage, a wire mesh should be placed under the probe to isolate the floating impurities outside the correct measurement range of the probe. Otherwise, accurate and stable display values will not be obtained.  
5. If there is significant fluctuation in the measured liquid level, the probe should be kept away from the fluctuation as much as possible, or anti wave conduits should be installed to reduce the fluctuation of the liquid level.
6. The pulse intensity setting should be appropriate, otherwise it will not work properly.

Wiring Diagram
1. Schematic diagram of current (voltage) output connected to secondary instrument

Common difficult phenomena and their solutions

Definition of local wiring