Vietnamese
Overview
Special feature
●Four display screens by switching
The main unit display can be switched between four different display screens.
● Mask processing
Manual mask processing is available.
Mask processing can be applied to obstacles within the sensor directivity angle for measurement.
● Communication Functions
Three communication functions enable remote control.
1) RS-485 (MODBUS protocol)
2) 4-20mA current output
3) Alarm output contact
Applications
Liquid and powder level control of tanks, etc.
Water level measurement of lakes, swamps and rivers
Specifications
| Model | HD353-A | |
| Number of Channels | 1CH | |
| Frequency | 50kHz | |
| Object of measurement | Liquid & Powder | |
| Distance measurement range | 0.3～10m | |
| Resolution | Measurement | 1ｍｍ |
| Display | 1ｍｍ | |
| Accuracy | ±0.25%F.S. (±2.5cm) | |
| Data updating cycle | 0.5 seconds | |
| Sensor Directivity Angle | 14°(-6dB) / 10°(-3dB) | |
| Power | Voltage | DC12～24V ±10% |
| Power consumption | 3W | |
| Display | Graphic LCD | |
| Display size | LCD 50ｘ25ｍｍ | |
| Output | Alarm output | 1 each upper and lower NPN open collector |
| 4-20mA current output | Resolution: 12bit (at 24V with maximum load resistance 500Ω) | |
| Interface | RS-485 (transmission distance: within 1200m) | |
| Model | HD353-A |
| Ambient operating temperature | -20～70℃ |
| Material | PP (polypropylene) |
| Structure | Equivalent to IP65 (Equivalent to IP20 when lid is open) |
| External Dimensions | φ93x110mm |
| Wiring cable length | 10m |
| Weight | 350g |
| Mounting screw（Former JIS) | G2(PF2) |
●Optional accessory: 30m cable
*Use resin nuts, flanges, etc. for installation.
Do not use metal nuts or flanges. Doing so may cause measurement errors.
Sensor installation
Ultrasonic Level Meter Cautions for Sensor Installation
(1) Avoid obstacles
Install the ultrasonic level meter so that there are no obstacles within the sensor directivity angle.
Mask processing can be used for measurement.
(2) Install horizontally
Install the ultrasonic sensor so that its transmitting and receiving surfaces are horizontal to the object to be measured. Also, avoid installing the sensor in the center of the tank.
(3)Do not install multiple ultrasonic level meters in one same tank.
Installing multiple ultrasonic level meters in the same tank will result in mutual interference and inaccurate measurements.
(4)/(5)Avoid areas where waves or bubbles are generated.
If there are severe waves or bubbles on the liquid surface, measurement may not be possible.
*Use resin nuts or flanges for installation.
Do not use metal nuts or flanges. Doing so may cause measurement errors.
