Flow meters liquid VLR

Flow meters liquid VLR

Measurement of flow and volume. The presence of the archive evidence. The availability of inputs for measuring pressure and temperature. The package one of the flow area. The presence of the current output and RS 232. Measuring and computing unit is wall performance indicator.

The meters provide measurement, display and conversion in a weekend uniform electric signals flow rate value, and the measurement and indication of the liquid volume cumulative total of the normalized error in the range of from 4 to 100% selected the highest flow rate Q max, are shown in table 1, for each conditional inner diameter of the primary Converter.

Conditional
internal
diameter
primary
Converter,
Dn mm Approximate value of the upper limit of the fluid velocity, m/c
1,00 1,60 2,50 4,00 6,00 10,00
The greatest flow rate, Q max m3/h
6
0,10 0,16 0,25 0,40 0,60 1,00
10 0,25 0,40 0,60 1,00 1,60 2,50
15 0,60 1,00 1,60 2,50 4,00 6,00
25 1,60 2,50 4,00 6,00 10,00 16,00
40 4,00 6,00 10,00 16,00 25,00 40,00
50 6,00 10,00 16,00 25,00 40,00 60,00
80 16,00 25,00 40,00 60,00 100,00 160,00
100 25,00 40,00 60,00 100,00 160,00 250,00
150 60,00 100,00 160,00 250,00 400,00 600,00
200 100,00 160,00 250,00 400,00 600,00 1000,00
300 250,00 400,00 600,00 1000,00 1600,00 2500,00
400 400,00 600,00 1000,00 1600,00 2500,00 4000,00

Note - Under the greatest flow rate Q max refers to the rate at which the counters provide their metrological characteristics in continuous operation.

The counters provide an indication of the following parameters:

the liquid flow in the pipeline (Q1), m3/h and t/h;

the total cumulative amount of fluid passing through the pipeline (V1), m3 and t;

values of the two temperatures, for example, liquids in pipelines (T1 and T2, in the presence of thermocouples), ° C;

the values of two input parameters according to selected measuring range (P1 and P2, with appropriate sensors);

resistance thermal converters in the pipeline (if any), Ω;

values of two input direct currents corresponding to the input parameters (P1 and P2, when present), mA;

time counter in the counting mode of the liquid quantity, (TWORK), h;

the current time and date;

nominal internal diameter of the used lane-primary Converter;

correspondence of output electrical signals of constant current (I1, I2) and their ranges or frequency of the output signals (F1, F2) selected by the user of the measured parameters;

selected by the user of the measuring range of input parameters (P1, P2) and the corresponding ranges of the input direct currents;

the serial number and meter modification;

the serial number of the transducer;

enable or disable channel interface (RS232);

the counter mode Counts/Stop;

type selected by the user of the nominal static characteristic indices used thermocouples (100P, Pt100, 100M);

user selected values for the highest flow rate (Q1max);

programmed by the user minimum value of the dis-course in the pipeline (Q1min), in percent of the maximum flow rate at which the meter detects an error.

Note In parentheses denote the parameters corresponding to the characters on the counter display.

The counter registers and provides an indication of the time of beginning and end, as well as the identification code errors occurring in the system water or heat or the counter when the operation Account .

Counter mode C Thu evaluates, registers and stores within 20 to 40 days in the internal non-volatile memory medium hourly values of the following parameters:

the liquid flow in the pipeline in m3/h;

two temperatures in °C;

two input parameters.

Counter mode Account evaluates, registers and stores for at least 1 year in internal anorganizational memory the values of the following parameters:

the average daily flow rate in m3/h;

two daily temperatures in °C;

fluid volume cumulative total at 00 h 00 min every day in m3;

time counter mode Account at 00 h 00 min every day in hours

All statistical data can be read from the memory of the meter via RS232 serial interface.

The counters in accordance with the customer order have two output electrical signal DC, the range of which the consumer chooses from a range: 0 - + 5 V, 0 to plus 20, plus 4 plus 20mA.

The counters provide the conversion to electrical output signals DC two parameters in the range from 4 to 100% of their value on the user choice from the following range:

the liquid flow in the pipeline;

the measured temperature in the first or second channel;

the measured input parameter in the first or second channel.

The highest value of the range of variation of the output signal corresponds to 100% of the value of the selected parameter.

Counters with the appropriate converters provide measurement values of the two temperatures (for example, the coolant in the pipes).

Working temperature range - from 0 to 150 °C.

Counters with appropriate sensors with standardized output signals DC provide measurement values of two input parameters (for example, pressure in the pipeline).

Measuring range of input parameters equal 0,4; 0,6; 1,0; 1,6; 2,5; 4,0 and should be chosen by the consumer. The range of input DC voltage that corresponds to the selected limit of measuring range