overview

Intelligent flow quantitative control instrument (hereinafter referred to as the controller) main features:

Suitable for all kinds of liquid media flow display, integration, quantitative control functions;

Input a variety of flow sensor signals (such as vortex street, turbine, electromagnetic, roots, elliptical gear, double rotor, orifice plate, V-cone, A Niuba, mass flow meter);

Flow input channel: can receive frequency signals and a variety of analog current signals;

Temperature input channel: can receive a variety of analog current signals;

Can provide transmitter +24V DC, +12V DC power supply, with short circuit protection function, simplify the system, save investment;

Fault tolerance function: When the temperature/density compensation measurement signal is abnormal, the corresponding manual setting value is used for compensation calculation;

Flow retransmit function, output flow current signal, update cycle 1 second, to meet the needs of automatic control;

Instrument clock and timing automatic meter reading function, printing function, to provide convenience for measurement management;

Rich self-test and self-diagnosis functions make the meter easier to use and maintain;

Three-level password setting can prevent unauthorized personnel from changing the set data;

The instrument is not equipped with any adjustable devices such as potentiometer, coding switch, so as to improve the seismic resistance, stability and reliability of the instrument;

Communication function: It can communicate with the host computer through various communication methods to form an energy metering network system:

RS-485;

RS-232;

The main technical indicators of the instrument

Input signal

Modular fitting:

Thermocouple: Standard thermocouple -- K, E, B, J, N, T, S;

Electrical resistance: standard thermal resistance -- Pt100;

Current: 0 ~ 10mA, 4 ~ 20mA -- input impedance ≤250Ω;

Pulse impulse:

Wave shape: rectangle, sine wave and triangle wave;

Amplitude: greater than 4V;

Frequency: 0 ~ 10KHz (or according to user requirements).

Output signal

Analog output:

DC 0 ~ 10mA (load resistance ≤750Ω);

DC 4 ~ 20mA (load resistance ≤500Ω);

Switching output

Relay output -- back error, AC220V/3A; DC24V/6A (resistive load).

Communication output

Interface mode -- standard serial communication interface: RS-232C, RS-485;

Baud rate - 600, 1200, 2400, 480, 9600Kbps, instrument internal Settings.

Feed output

DC24V, load ≤100mA;

DC12V: Load ≤200mA

specificity

Measurement accuracy: ±0.2%FS±1 word or ±0.5%FS±1 word

Frequency conversion accuracy: ±1 pulse (LMS) is generally better than 0.2%

Measuring range: -999999 ~ 999999 words (instantaneous value, compensation value);

0 ~ 99999999.9999 words (cumulative value)

Resolution: ±1 word

Display mode

· 128×64 dot matrix LCD graphic display with large backlit screen;

· Historical cumulative flow, instantaneous flow, medium temperature, medium density, flow (differential pressure current, frequency) value, clock, alarm status;

·0 ~ 999999 Instantaneous flow rate

·0 ~ 99999999.9999 Cumulative value

·-9999 ~ 9999 temperature compensation

·-99999 ~ 999999 Flow (differential pressure, frequency) value