MH-NA Level Measuring Instrument User Manual

Ⅳ、MENU OPERATION AND PARAMETERS SETTING

MH-A ultrasonic level measuring instrument, taking the advantages of various many level measuring instruments, is a universal one characterized by total digitalized and humanized design. It has perfect level monitoring, data transmission and man-machine communication. It is featured by strong anti-interference performance; free setting of upper and lower limits and online output regulation, on-site indication, optional analog, switching value, and RS485 output and easy connection with main unit. The cover, made of waterproof engineering plastics, is small and firm with ABS probe. Therefore, it...

Power: 12-24VDC Power consumption：<1.5W Output (optional)： 4～20mA RL>600Ω（standard） 1～5V\1～10V RS485 3 NPN 2 relays (AC: 5A 250V DC: 10A 24V) Material：ABS Dimension：Φ92mm×198mm×M60 Electrical interface：M20X1.5 Installation：M60X2 or ￠61MM Operating surroundings：normal temperature, normal pressure Protection degree：IP65(others optional) IV. Menu operation and parameters setting 4.1 Keys function （A） （1.1）normal work / menu：enter password. （1.2）menu interface：page down or back, Long press back to normal work. （1.3）input/ confirm： Confirm input data and exit this menu. （B） （2.1）menu interface： Enter...

FS.45：FS，end point of output:20mA. DR.49：Add.，serial port address: 0-255. BP.50：Bdr.，serial port baud rate: 600-38400. 1L.54：No.1 D，No.1 switch output D. 1H.55：No.1 H，No.1 switch output H. 2L.56：No. 2 D，No.2 switch output D. 2H.57：No.2 H，No.2 switch output H. 3L.58：No.3 D，No.3 switch output D. 3H.59：No.3 H，No.3 switch output H. Ⅴ、Installation and precaution 5.1 sensor installation 5.1.1 Sensor should be placed where there is no obstacle between emission surfaces and measured liquid, it also should be far way from feeding throats, chartⅠ. 5.1.2 Tank shape should be considered. Some type of container...

5.2 work mode This instrument has two mode, the difference as following, chart V: 5. 2.1 Measure liquid level B (Installation Height) is the distance from bottom of container to sensor surface, A is the distance between sensor surface and liquid surface, D is the height oi liquid, D= B (Installation Height) -A, display value is bottom of container to liquid surface (D) . 5. 2. 2 Measure air distance Set BD =0, display value is distance from sensor surface to liquid surface (A). 5.3 DC12V power is better. When it’s from switch power, the DC negative must contact ground. Refer to the tags attached...

6.2 Wiring diagram of current (voltage) output connecting with secondary instrument Level meter Secondary instrument Input ﹢(3 wire for power ﹢) 6.3 serial output connecting with PC Power Level meter Supply + Output A Output Serial port 6.4 NPN output wiring diagram Conventional relay

©Non vertical installation, leading to multiple reflection ©installed too close to wall, sonic wave reflected midway© check “BD”@ check temperature display Remedy ©Adjust installation positions several times.© correctly set “BD” ©adjust temperature (“TE”) to proper value. 6 Abnormal current output Probable reason ©Too large load resistance ©FS, AL or AH changed. © undesired supply rectification and filtering @ electrify time is not enough Remedy ©Lower load resistance ©readjust parameter© replace with DC regulated supply with larger capacity ©electrify >15 minutes before work 7^ Abnormal RS485...

Manufacturer Certificate Mode Main specification Sense range：FS= Output：□0-20mA；■4-20mA；□0-5V；□1-5V； □ 0-10V；□1-10V；■RS485；□other Working temperature：■normal；□-10-60℃；□other Working pressure：■normal；□other Working humidity：≤80%RH Storage temperature：-40—85℃ Storage humidity：≤70%RH Working