Piktec Mf series User manual

User Manual

Electromagnetic flowmeter

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1. Product features and scope of application

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Converter features:

①Programmable frequency low frequency rectangular wave excitation improves the stability of

flow measurement and low power loss;

②It adopts 32-bit embedded microprocessor, which is fast in operation.High precision;

③Full digital processing, strong anti-interference ability, reliable measurement, high

accuracy, flow measurement range up to 1000: 1;

④Ultra low EMI switching power supply is suitable for a wide range of power supply voltage

changes.Good EMC resistance;

⑤All Chinese menu operation, easy to use, simple operation, easy to learn and understand;

⑥ High definition backlit LCD display;

⑦It has two-way flow measurement, two-way total amount accumulation function, current and

frequency output function.

⑧ There are three integrators in the interior, which can respectively display the forward

accumulated quantity, the reverse accumulated quantity and the difference accumulated

quantity.

⑨ RS485 digital communication signal interface;

⑩With conductivity measurement function, it can judge whether the sensor is empty or not;

⑪Constant current excitation current has a wide range, which can be used with different

companies and different types of electromagnetic flow sensors;

⑫Self check and self diagnosis function;

⑬With SMD device and SMT technology, the circuit has high reliability;

2. Working principle

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B

i

s

a

c

o

n

s

t

a

n

t

;

a

t

h

e

s

a

m

e

t

i

m

e

,

t

h

e

E

M

F

i

n

d

u

c

e

d

b

y

t

h

e

s

e

n

s

o

r

i

s

a

m

p

li

f

i

e

d

a

n

d

c

o

n

v

e

r

t

e

d

i

n

t

o

a

s

t

a

n

d

a

r

d

c

u

rr

e

n

t

s

i

g

n

a

l

o

r

f

r

e

q

u

e

n

c

y

s

i

g

n

a

l

,

s

o

As

t

o

f

a

c

ili

t

a

t

e

t

h

e

d

i

s

p

l

a

y

,

c

o

n

t

r

o

l

a

n

d

r

e

g

u

l

a

t

i

o

n

o

f

t

h

e

f

l

o

w

.

F

i

g

u

re

1

.

2

s

h

o

w

s

t

h

e

c

o

n

v

e

r

t

e

r

c

i

r

c

u

i

t

structure

3. Functional and technical performance indexes

3.1 Executive Standards

JB / T 9248-1999 electromagnetic flow meter.

basic parameters and performance indexes

nominal diameter of matched sensor:

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、1200、1400、1600、1800、2000、2200、2400、2600、

2800、3000；

flow measurement range

T

h

e

f

l

o

w

v

e

l

o

c

i

t

y

o

f

t

h

e

u

pp

e

r

li

m

i

t

v

a

l

u

e

o

f

l

o

w

m

e

a

s

u

r

e

m

e

n

t

r

a

n

g

e

c

a

n

b

e

s

e

l

e

c

t

e

d

i

n

t

h

e

r

a

n

g

e

o

f

0

.

3

m

/

s

~

1

0

m

/

s

,

a

n

d

t

h

e

f

l

o

w

v

e

l

o

c

i

t

y

o

f

t

h

e

l

o

w

e

r

li

m

i

t

v

a

l

u

e

c

a

n

b

e

1

%

o

f

t

h

e

u

pp

e

r

li

m

i

t

v

a

l

u

e

.

the accuracy of flow meter under reference conditions is shown in the tablebelow.

Path

mm

R

a

n

g

e

m

/

s

Accuracy

3~ 20

0.3

F

o

ll

o

w

i

n

g

+

0

.

25

%

F

S

0.3~ 1

+

1

.

0

R

1~ 10

+

0

.

5

%

R

25~ 600

0.1

~

0

.

3

+

0

.

25

%

F

S

0.3~ 1

+

0

.

5

%

R

1~ 10

+

0

.

3

%

R

700~ 3000

0.3

F

o

ll

o

w

i

n

g

+

0

.

25

%

F

S

0.3~ 1

+

1

.

0

%

R

1~ 10

+

0

.

5

%

R

%FS: relative range;% R: relative measurement value.

repeatability error

±

0

.

1

5

%

o

f

t

h

e

m

e

a

s

u

r

e

d

v

a

l

u

e

.

4. Hardware interface

P

r

od

u

c

t

w

i

r

i

n

g

i

d

e

n

t

i

f

i

c

a

t

i

o

n

d

e

f

i

n

i

t

i

o

n

(

a

ll

p

r

od

u

c

t

d

e

f

i

n

i

t

i

o

n

s

a

r

e

c

o

n

s

i

s

t

e

n

t

)

Terminal

identification

function

Explain

L:

220V AC power input

Can be connected to ac36v ~

a

c

260

v

po

w

e

r

s

u

pp

l

y

N:

220V AC power input

+24V:

D

C

2

4

V

i

n

p

u

t

po

s

i

t

i

v

e

po

l

e

The input error of 24V power

supply shall not be greater

than 5%, otherwise the dose

error may be increased

GND

D

C

2

4

V

i

n

p

u

t

n

e

g

a

t

i

v

e

po

l

e

EX1 Y:

E

x

c

i

t

a

t

i

o

n

c

o

il

S

o

m

e

p

r

od

u

c

t

s

a

r

e

l

e

d

o

u

t

w

i

t

h

r

e

d

a

n

d

b

l

a

ck

do

u

b

l

e

s

t

r

a

n

d

e

d

w

i

r

e

s

EX2 X:

IOUT+:

4-20mA current output

positive (active isolation)

T

h

e

o

u

t

p

u

t

l

o

a

d

i

s

n

o

t

m

o

r

e

t

h

a

n

600

Ω

,

o

t

h

e

r

w

i

s

e

t

h

e

a

n

a

l

og

o

u

t

p

u

t

a

cc

u

r

a

c

y

w

ill

b

e

reduced

IOUT-:

4-20mA current output

negative (active isolation)

POUT+:

F

r

e

q

u

e

n

c

y

(

p

u

l

s

e

)

o

u

t

p

u

t

F

r

e

q

u

e

n

c

y

m

od

e

s

e

tt

i

n

g

f

r

e

q

u

e

n

c

y

r

a

n

g

e

i

s

n

o

m

o

r

e

than 5KHz

COMM:

F

r

e

q

u

e

n

c

y

(

p

u

l

s

e

)

o

u

t

p

u

t

ground

485A:

RS485 communication A

485B:

RS485 communication B

GND C:

S

i

g

n

a

l

g

r

o

un

d

S

o

m

e

p

r

od

u

c

t

s

a

r

e

l

e

d

o

u

t

w

i

t

h

g

r

a

y

2

r

e

d

a

n

d

w

h

i

t

e

t

w

o

c

o

r

e

w

i

r

e

s

a

n

d

s

h

i

e

l

d

e

d

w

i

r

e

s

,

t

h

e

s

h

i

e

l

d

i

n

g

l

a

y

e

r

i

s

G

N

D

,

r

e

d

i

s

i

g

1

,

w

h

i

t

e

i

s

i

g

2

SIG1 B:

C

o

nn

e

c

t

e

d

t

o

e

l

e

c

t

r

od

e

s

i

g

n

a

l

1

SIG2 A:

C

o

nn

e

c

t

e

d

t

o

e

l

e

c

t

r

od

e

s

i

g

n

a

l

2

GND PT1000 GND:

C

o

nn

e

c

t

e

d

t

o

s

u

pp

l

y

a

n

d

r

e

t

u

r

n

w

a

t

e

r

t

e

m

p

e

r

a

t

u

r

e

sensor PT1000

S

u

ppo

r

t

h

e

c

h

a

n

g

e

o

f

t

e

r

m

i

n

a

l

b

l

o

ck

o

n

t

h

e

h

e

a

t

m

e

t

e

r

+FQH-

U

pp

e

r

a

n

d

l

o

w

e

r

li

m

i

t

a

l

a

r

m

o

u

t

p

u

t

(

p

a

ss

i

v

e

)

5. Operation and setting

W

h

e

n

t

h

e

i

n

s

t

r

u

m

e

n

t

i

s

po

w

e

r

e

d

o

n

,

i

t

w

ill

e

n

t

e

r

t

h

e

m

e

a

s

u

r

e

m

e

n

t

s

t

a

t

e

a

u

t

o

m

a

t

i

c

a

ll

y

.

I

n

t

h

e

a

u

t

o

m

a

t

i

c

m

e

a

s

u

r

e

m

e

n

t

s

t

a

t

e

,

t

h

e

i

n

s

t

r

u

m

e

n

t

a

u

t

o

m

a

t

i

c

a

ll

y

c

o

m

p

l

e

t

e

s

e

a

c

h

m

e

a

s

u

r

e

m

e

n

t

f

un

c

t

i

o

n

a

n

d

i

s

p

l

a

y

s

t

h

e

c

o

rr

e

s

po

n

d

i

n

g

m

e

a

s

u

r

e

m

e

n

t

d

a

t

a

.

I

n

t

h

e

p

a

r

a

m

e

t

e

r

s

e

tt

i

n

g

s

t

a

t

e

,

t

h

e

u

s

e

r

u

s

e

s

f

o

u

r

p

a

n

e

l

k

e

y

s

t

o

c

o

m

p

l

e

t

e

t

h

e

i

n

s

t

r

u

m

e

n

t

p

a

r

a

m

e

t

e

r

s

e

tt

i

n

g

.

key operation instructions

Key name

Function key

:

T

h

e

k

e

y

i

s

u

s

e

d

i

n

c

o

m

b

i

n

a

t

i

o

n

w

i

t

h

t

h

e

k

e

y

,

a

n

d

i

s

n

o

t

u

s

e

d

a

l

o

n

e

,

U

s

e

1

:

i

n

t

h

e

m

e

a

s

u

r

e

m

e

n

t

i

n

t

e

r

f

a

c

e

,

p

r

e

ss

a

n

d

h

o

l

d

t

h

e

f

un

c

t

i

o

n

k

e

y

,

p

r

e

ss

t

h

e

O

K

k

e

y

a

n

d

e

n

t

e

r

t

h

e

p

a

r

a

m

e

t

e

r

s

e

tt

i

n

g

,

U

s

e

2

:

p

r

e

ss

a

n

d

h

o

l

d

t

h

e

f

un

c

t

i

o

n

k

e

y

i

n

t

h

e

i

n

t

e

r

f

a

c

e

w

h

e

r

e

y

o

u

n

ee

d

t

o

i

n

p

u

t

h

e

v

a

l

u

e

,

p

r

e

ss

t

h

e

b

u

il

d

u

p

(

t

h

e

t

h

i

r

d

k

e

y

)

t

o

m

o

v

e

t

h

e

m

od

i

f

y

c

u

r

s

o

r

t

o

t

h

e

r

i

g

h

t

,

o

r

p

r

e

ss

a

n

d

h

o

l

d

t

h

e

f

un

c

t

i

o

n

k

e

y

,

p

r

e

ss

t

h

e

b

u

il

d

u

p

(

t

h

e

s

e

c

o

n

d

k

e

y

)

t

o

m

o

v

e

t

h

e

m

od

i

f

y

c

u

r

s

o

r

t

o

t

h

e

l

e

f

t

Down key:

U

s

e

1

:

t

h

e

m

e

a

s

u

r

e

m

e

n

t

i

n

t

e

r

f

a

c

e

u

s

e

s

t

h

e

s

w

i

t

c

h

s

c

r

ee

n

t

o

d

i

s

p

l

a

y

t

h

e

c

o

n

t

e

n

t

a

n

d

v

i

e

w

t

h

e

c

o

rr

e

s

po

n

d

i

n

g

d

a

t

a

,

U

s

e

2

:

i

n

t

h

e

p

a

r

a

m

e

t

e

r

s

e

l

e

c

t

i

o

n

i

n

t

e

r

f

a

c

e

,

y

o

u

c

a

n

s

w

i

t

c

h

t

o

t

h

e

c

o

rr

e

s

po

n

d

i

n

g

s

e

tt

i

n

g

i

t

e

m

U

s

e

3

:

i

n

t

h

e

c

o

rr

e

s

po

n

d

i

n

g

s

e

tt

i

n

g

i

t

e

m

,

i

f

t

h

e

p

a

r

a

m

e

t

e

r

i

s

a

p

r

e

s

e

t

f

i

x

e

d

v

a

l

u

e

,

y

o

u

c

a

n

s

e

l

e

c

t

h

e

c

o

rr

e

s

po

n

d

i

n

g

p

r

e

s

e

t

v

a

l

u

e

;

PIKTEC MF Series User manual

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