AiMag electromagnetic flowmeter
14Pages

AiMag electromagnetic flowmeter Operating Instruction Hangzhou ART Intelligent Equipment Co., Ltd

Operating Instruction 1 Overview This manual mainly describes the operation instructions of AiMag electromagnetic flowmeter (hereinafter referred to as electromagnetic flowmeter), including installation, electrical connection, operation and debugging, troubleshooting, etc. 2 Installation requirements a) The instrument can be installed at any position on the running pipeline, and vertically installing is preferred. When measuring, it is necessary to ensure that the measuring tube is completely filled with medium, and the electromagnetic flowmeter cannot work normally when the tube is not...

a) When the instrument is installed in a plastic pipe or a pipe with insulated inner wall, grounding rings shall be installed on both ends of the sensor to realize grounding of the measured medium in the measuring pipe and ensure correct measurement, as shown in Figure 2. Figure 2 Insulated pipe grounding a) The instrument is installed on the cathodic protection pipeline. There is a certain potential difference between the cathodic protection pipeline and the ground. The flanges on both sides are electrically connected with copper wires. The pipeline flanges and the pipeline must be...

The measuring instrument has no internal circuit breaker. Therefore, it is necessary to install switches or power interruption protectors for measuring instruments to ensure that the power supply line connection on the power supply can be easily disconnected. The measuring instrument has built-in fuse, and additional overcurrent protection should be installed in the system. NPE L 220VAC Figure 5 Distribution diagram of terminal of separate type

Figure 6 Distribution diagram of terminal of integrated type Table 1 Terminal Definition Number Terminal definition Signal ground Excitation current Current output power supply Analog current output Analog current output ground Flow frequency (pulse) output Frequency (pulse) output ground 220V power supply ground Positive electrode of 24V DC power supply Negative electrode of 24V DC power supply DC power supply ground Remarks Connect sensor Analog current output Frequency or pulse output Communication Power supply

+66666.66 Empty pipe alarm Forward cumulative flow Reverse cumulative flow Total flow Flow rate Flow ratio Current value Pulse value or frequency value Empty pipe ratio CDC(With or without) Exit key Up key, +1 ,Forward page key Down key, -1 ,Back page key Function key Figure 7 Schematic diagram of keystrokedisplay After the instrument is powered on, it enters the automatic measurement state, realizes various measurement functions and displays the corresponding measurement data. Instrument parameters can be set and displayed by operating four panel buttons. 5.1 Functions of key The...

enter the menu without password within 5 minutes (you can directly enter the menu by operating the function key + exit key on the password input screen). 5.3 Parameter Settings Menu Table 3 Function Code Definition Table Parameter setting Function setting Measure pipe diameter 3mm ~ 3000mm ± 0 ~ ± 99mm caliber fine adjustment Flow unit Flow decimal place setting Automatic, manual; Instantaneous flow can be set to 0 ~ 3 decimal points when setting manually Flow accumulation unit Instrument range Excitation frequency Excitation current Fluid density Selection of Measuring method Forward,...

Communication settings Mailing address setting Modbus Communication Settings Communication baud rate setting Communication check bit setting Pulse output type Pulse, frequency Current output fine adjustment Pulse polarity Output settings Positive, negative Pulse unit equivalent The unit is L, which can be set between 0.001 L and 10000.000 L Pulse width setting Optional automatic or manual mode, manual mode can be set Frequency output range 4-20mA output test Diagnostic test Simulated current output Simulate flow state in pipeline (frequency, pulse and current have output) Flow rate test...

Flow zero modification Automatic zero modification Allow, prohibit Time automatic modification Sensor coefficient Sensor coefficient calculation Input standard flow, automatically calculate and save sensor coefficients Converter normalization coefficient Permission of linear correction of flow rate Allow, prohibit Flow linear modification point Linear modification value of flow rate 6 Modbus communication protocol This product supports Modbus communication protocol, which can be used to collect parameters such as the instantaneous flow rate and the cumulative flow of electromagnetic...

Table 4 Register Definitions Register address Register definition Floating point number Forward cumulative flowfloating point scheme Floating point number Reverse cumulative flowfloating point scheme Floating point number Total cumulative flowfloating point scheme Cumulative flow is cleared Floating point number Flow-floating-point format Floating point number Velocity-floating point scheme Floating point number Percentage of flow-floatingpoint format Empty pipe percentage Flow unit Empty pipe alarm Excitation alarm 6.3 Data Meaning Description Attribute meaning: a)RO read-only parameters;...

6.3.2 Units of Flow Table 6 Flow Units Code Instantaneous unit Cumulative unit Empty pipe alarm and excitation alarm: 0-no alarm; 1-alarm. 6.4 Communication Data Analysis 6.4.1 Read cumulative flow 01 Device address Function code Register address high order Device address Function code Data length High register Low register length length Answer message: 4-byte floating point number (instantaneous flow) For example, if a reply message is received, the floating point number is 0011 1111 1100 0001 1001 0111 0100 1110, that is, addresses 3F (0011 1111), C1 (1100 0001), 97 (1001 0111), 4E (0100...

Device address Function Register code address high order Low register High register address length Device address Function code Data length 4-byte floating point number (instantaneous flow rate) For example, if a reply message is received and the floating point number is: 42 0C 00 00, then: S = 0, which means a positive number. E = 10000100, with an index of 132. M = 000 1100000 0000 0000 0000 0000, Mantissa: 1 + 1/16 + 1/32 The decimal result of instantaneous velocity is: V ≈ (1) 12 (132-127) (1 + 1/16 + 1/32) = 35