Flow totalizer

Flow totalizer is used to collect, display, control, remote, communicate and print the various signals such as temperature, pressure, flow and so on. It forms the digital acquisition system and control system. It has liquid crystal and digital display, various dimensions, It can be used for quantitative / batch control of media (with start, stop, clear function), with a variety of flow sensors or transmitters Supporting the use, to adapt to a variety of measurement control occasions.

Flow totalizer features

1, flow totalizer [1] with a variety of flow sensors or transmitters, temperature sensors or transmitters and pressure transmitters used in conjunction with a variety of liquid, steam, natural gas, general gas and other flow parameters to measure Display, cumulative calculation, alarm control, transmission output, data acquisition and communication. Features

● Full range of automatic temperature, pressure compensation operation, compensation mode arbitrarily set

● linear totalizer, square set of any set

● instantaneous flow, cumulative flow, temperature, pressure, a variety of parameters

● Small signal removal function, the removal range of 0-5% optional

● The accumulated flow value can be cleared by the panel key, and the clear operation can be locked

2, flow totalizer

Can be the quality of the material, volume, length of the cumulative calculation. And can be batch control. It uses the technology mature and has been mass-produced AI series instrument common hardware, with excellent flow totalizer software, so that the instrument has a feature-rich, easy programming, good anti-jamming, high reliability, fast delivery, low cost and low Price and other advantages. The main features of the instrument are as follows:

● Programmable input specifications, the flow input signal can be programmed as l ~ 5V, 0 ~ 5V, 4 ~ 20mA and frequency. The temperature signal programmable input is Ptl 00 thermal resistance, K, E, J type thermocouple or standard current signal, the pressure signal can be standard voltage or current signal.

● Can be installed AI series of various modules and a variety of programmable functions, can achieve instantaneous flow, temperature and pressure on the lower limit alarm function, and with transmission output, communication, 24V / 12V voltage output and other functions.

● With 8-bit accumulator and 4-bit instantaneous measurement display, you can choose to open / no side of the processing and set any range of small signal removal function.

● With complete temperature compensation function, no need to replace the different instruments or models. Through the programming can be achieved in general gas, saturated steam,

Superheated steam and liquid temperature and pressure compensation operation. The use of look-up table to compensate for the steam operation. With high accuracy.

● As a batch controller, the instrument has a separate 4-bit control accumulator and 12-bit total accumulator, and a special display state, powerful, easy to operate.

● advanced computing methods to ensure that the frequency signal even when the frequency is very low, there is sufficient flow operation accuracy. Model definition

The instrument uses an advanced modular design. Traffic signal input, communication, transmission and other functions can be configured according to the actual needs of different modules to achieve, flexible and convenient configuration. The instrument allows up to five modules to be installed. Any one of the instrument pressure and temperature input can be set free, so the temperature and pressure input mode has nothing to do with the model.

Main Specifications

Basic error: 0.5% fs or 0.2% fs ± 1 word

Resolution: 1/20000, 14-bit a / d converter

Display: double row at the same time display, the top row of four digital tube shows the instantaneous flow, the next row of eight digital display cumulative flow sampling cycle: 0.5s

Alarm output: instantaneous flow of two limit alarm, relay output contact capacity ac220v / 3a

Transmission output: 4 ~ 20ma, 0 ~ 10ma, 1 ~ 5v, 0 ~ 5v Accuracy: ± 0.3% fs

Communication output: interface mode - isolated serial two-way communication interface rs485 / rs422 / rs232 / modem

Baud rate - 300 ~ 9600bps internal free set

Feed output: dc24v / 50ma

Power: switching power supply 85 ~ 265vac power below 4w

Input characteristics:

Frequency: Input impedance greater than 10kW

Voltage: Input impedance greater than 300kW

Current type: Input impedance 250W

Output characteristics:

Relay capacity: 3A / 220VAC or 3A / 24VDC, resistive load

Current-type transmitter output load impedance: less than 600W

Voltage type transmission output load: more than 200KW

The scope of application

It is suitable for the measurement, display, control and measurement of industrial process flow parameters without compensation for tap water, oil, liquid, solid liquid and so on. Can receive orifice differential pressure input or vortex flowmeter, electromagnetic flowmeter, turbine flowmeter and other flowmeter input signal.

Use of the environment: ambient temperature: -10 ~ 55 ℃, ambient humidity: 10 ~ 90% RH.