Electromagnetic (Mag) flowmeter

Detailed Product Description

 

      General Specification

1        Meter Size (mm)

   

3, 6, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1600, 1800, 2000, 2200, 2400, 2600, 2800, 3000

2        Flow Range

is capable of measuring flow speed from 0.3m/s to 15m/s. The minimum measurable speed can be one percent (1%) of the full range.

3        Accuracy

DN mm	Flow Range m/s	Accuracy
3  to 20	< 0.3	±0.25%FS
	0.3 to 1	±1.0R
	1 to 15	±0.5%R
25 to 600	0.1 to 0.3	±0.25%FS
	0.3 to 1	±0.5%R
	1 to 15	±0.3%R
700 to 3000	< 0.3	±0.25%FS
	0.3 to 1	±1.0%R
	1 to 15	±0.5%R
%FS: error of full span; %R: error of rate

4        Repeatability

Repeatability error  <     ±0.1%.

5         Current output

Current output: fully-isolated 0 - 10mA / 4 - 20mA

(a) Load resistance:        0 - 10mA, 0 to 1.5kΩ;

     4 - 20mA, 0 to 750Ω.

(b) Basic error: add ±10μA on top of the measurement error

6        Frequency Output

Frequency output is proportional to the flow percentage of the full range.  provides fully isolated transistor open collector frequency output ranged from 1 to 5000 Hz. The external DC power supply should not exceed 35V and maximum collector current is 250mA.

7        Pulse Output

The converter can output up to 5000cp/s pulse series, which is dedicated to external totalization. Pulse factor is defined as pulse count per unit volume or mass. It can be set to 0001-9999p/L, 0001-9999p/m³, 00019999p/kg or 00019999p/t. Pulse width is selectable from 16ms, 33 ms, 66mm, 99ms or auto square wave. Photo-coupler isolated transistor open collector circuit is used for pulse output. The external DC power supply should not exceed 35V and maximum collector current is 250mA.

8        Flow Direction Indication

 measuring both forward and reverse flow and recognizing its direction. The converter outputs 0V low level for forward flow, while +12V high level for reverse flow.

9        Alarm Output

Two channels of photo-coupler isolated open collector circuit are used for alarm signal output. There are two alarm outputs: high limit alarm and low limit alarm. The external DC power supply should not exceed 35V and maximum collector current is 250mA.

10  &nbp; Communication

The RS485 or RS232C communication interface is embedded in the converter and supports data transfer up to 2km at 14400bps. Surge absorber is optional to protect the interface and converter.

11    Damping Constant

Damping time is selectable from 0.2 to 100s.

12    Electrical Isolation

The isolation voltage between analog input and analog output is not less than 500V;

The isolation voltage between analog input and alarm power supply is not less than 500V;

The isolation voltage between analog input and AC power supply is not less than 500V;

The isolation voltage between analog output and AC power supply is not less than 500V;

The isolation voltage between analog output and earth is not less than 500V;

The isolation voltage between pulse output and AC power supply is not less than 500V;

The isolation voltage between pulse output and the earth is not less than 500V;

The isolation voltage between alarm output and AC power supply is not less than 500V;

The isolation voltage between alarm output and the earth is not less than 500V.

13    Input Contact

External contact ON (close) or OFF (open) signal can be used to remotely control the start/stop or reset of internal counter.