Обзор
The SITRANS P250 transmitter measures the differential pressure of liquids and gases.
Область применения
The SITRANS P250 transmitter for differential pressure is primarily used in the following industries:
- Chemical industry
- Pharmaceutical industry
- Food industry
- Mechanical engineering
- Shipbuilding
- Water supply
Заказные данные
| Заказной № |
Вес, кг |
Описание |
Наличие на складе |
Заказать |
Тех. данные
Особенности
- High measuring accuracy
- Sturdy stainless steel enclosure
- For aggressive and non-aggressive media
- For the measurement of the differential pressure of liquids and gases
- Temperature-compensated measuring cell
- Compact design
Дизайн
Main components:
- Stainless steel enclosure with piezo-resistive ceramic measuring cell and (temperature-compensated) electronics module
- Process connection made of stainless steel in diverse designs (see Selection and ordering data)
- Electrical connection through connectors acc. to EN 175301-803-A and round connectors M12, as well as with permanently fixed cable
Функции
The pressure transmitter measures the differential pressure of liquids and gases.
Mode of operation
SITRANS P250 pressure transmitter, function diagram
The piezo-resistive ceramic measuring cell (membrane) has a Wheatstone bridge circuit, on which the operating pressure P1 and P2 of the media acts at both ends.
The voltage output from the measuring cell is converted by an amplifier into an output current of 4 to 20 mA or an output voltage of 0 to 5 or 10 V DC.
The output current and voltage are linearly proportional to the input pressure.
Технические данные
|
SITRANS P250 differential pressure transmitter
|
|
Application
|
|
Differential pressure transmitter
|
Liquids and neutral gases
|
|
Mode of operation
|
|
Measuring principle
|
Piezo-resistive measuring cell (ceramic diaphragm)
|
|
Input
|
|
Measured variable
|
Differential pressure
|
|
Measuring range
|
0 ... 0.1 to 0 ... 25 bar
(0 ... 1.45 to 0 ... 363 psi)
|
|
Operating pressure
|
≤ 25 bar (363 psi) at a differential pressure range < 6 bar (87 psi)
≤ 50 bar (725 psi) at a differential pressure range > 10 bar (145 psi
|
|
Burst pressure
|
1.5 x operating pressure
|
|
Output
|
|
|
Output signal
|
|
|
|
4 ... 20 mA
|
|
|
0 ... 5 V and 0 ... 10 V DC
|
|
Load
|
|
|
3-wire
|
> 10 kΩ
|
|
2-wire
|
≤ (UH - 11 V) / 0.02 A
|
|
Measuring accuracy
|
|
|
Dynamic behavior (at 25°C (77°F), including conformity error, hysteresis and repeatability)
|
≤ 1 % of typical full-scale value, see "Measuring range" table
|
|
Long-term drift acc. to IEC 60770
|
≤ 0.5 % of full-scale value/year
|
|
Influence of ambient temperature
|
|
|
|
≤ 0.6 %/10K of full-scale value
(≤ 1.2 % / 10K for measuring cell 0 ... 0.1 bar (1.45 psi))
|
|
|
≤ 0.22 %/10K of full-scale value
(≤ 0.37 % / 10K for measuring cell 0 ... 0.1 bar (1.45 psi))
|
|
Dynamic behavior
|
Suitable for static and dynamic measurements
|
|
Response time T99
|
< 5 ms
|
|
Load variation
|
< 50 Hz
|
|
Conditions of use
|
|
|
Ambient conditions
|
|
|
|
-15 ...+ 85 °C (5 ... 185 °F)
|
|
|
-15 ...+ 85 °C (5 ... 185 °F)
|
|
|
-40 ...+ 85 °C (-40 ... +185 °F)
|
|
Degree of protection acc. to EN 60529
|
IP65
|
|
Mounting position
|
Any
|
|
Mounting
|
Mounting bracket, included in delivery
|
|
Design
|
|
|
Weight
|
Approx. 430 g (approx. 0.95 lb)
|
|
Enclosure material
|
Stainless steel 1.4305/AISI 303
|
|
Electrical connection
|
- Plug EN 175301-803-A
- Circular plug EN 60130-9
- Cable 1.5 m
|
|
Process connection
|
- Hose sleeve Ø 4 mm/6 mm
- Pipe union Ø 6 mm/8 mm
- Male thread 7/16-20 UNF, G1/8
- Female thread 1/8-27 NPT
- (Standard), G1/8
|
|
Wetted parts materials
|
|
|
|
Stainless steel 1.4305/AISI 303, CuZn nickel-plated
|
|
|
Ceramic Al2O3 (96 %)
|
|
|
FPM (standard), EPDM, NBR, MVQ, CR
|
|
Power supply UH
|
|
|
Terminal voltage on pressure transmitter
|
|
|
|
11 ... 33 V DC
|
|
|
11 ... 33 V DC/
24 V AC ±15 %
|
|
|
18 ... 33 V DC/
24 V AC ±15 %
|
|
Current consumption at nominal pressure
|
|
|
|
< 20 mA
|
|
|
< 5 mA
|
|
Protection against polarity reversal
|
Protected against short-circuit and polarity reversal. Each connection against the other with max. supply voltage.
|
|
Certificates and approvals
|
|
|
Approval
|
CE conformity
|
|
Measuring range
|
|
Max. permissible operating pressure
(on either side)
|
Burst pressure
|
Max. permissible operating pressure
(on one side)
|
Accuracy
|
|
[bar]
|
[psi]
|
|
|
|
|
|
0 ... 0.1
|
0 ... 1.45
|
25 bar
(363 psi)
|
37.5 bar
(544 psi)
|
0.6 bar
(8.7 psi)
|
≤ 1.0 %
|
|
0 ... 0.2
|
0 ... 2.9
|
25 bar
(363 psi)
|
37.5 bar
(544 psi)
|
0.6 bar
(8.7 psi)
|
≤ 0.8 %
|
|
0 ... 0.25
|
0 ... 3.63
|
25 bar
(363 psi)
|
37.5 bar
(544 psi)
|
0.6 bar
(8.7 psi)
|
≤ 0.5 %
|
|
0 ... 0.3
|
0 ... 4.35
|
25 bar
(363 psi)
|
37.5 bar
(544 psi)
|
0.6 bar
(8.7 psi)
|
≤ 0.5 %
|
|
0 ... 0.4
|
0 ... 5.8
|
25 bar
(363 psi)
|
37.5 bar
(544 psi)
|
1.2 bar
(17.4 psi)
|
≤ 0.8 %
|
|
0 ... 0.5
|
0 ... 7.25
|
25 bar
(363 psi)
|
37.5 bar
(544 psi)
|
1.2 bar
(17.4 psi)
|
≤ 0.5 %
|
|
0 ... 0.6
|
0 ... 8.7
|
25 bar
(363 psi)
|
37.5 bar
(544 psi)
|
1.2 bar
(17.4 psi)
|
≤ 0.5 %
|
|
0 ... 1
|
0 ... 14.5
|
25 bar
(363 psi)
|
37.5 bar
(544 psi)
|
2 bar
(29psi)
|
≤ 0.5 %
|
|
0 ... 1.6
|
0 ... 23.2
|
25 bar
(363 psi)
|
37.5 bar
(544 psi)
|
3.2 bar
(46.4 psi)
|
≤ 0.5 %
|
|
0 ... 2.5
|
0 ... 36.3
|
25 bar
(363 psi)
|
37.5 bar
(544 psi)
|
5 bar
(72.5 psi)
|
≤ 0.5 %
|
|
0 ... 4
|
0 ... 58
|
25 bar
(363 psi)
|
37.5 bar
(544 psi)
|
8 bar
(116 psi)
|
≤ 0.5 %
|
|
0 ... 6
|
0 ... 87
|
25 bar
(363 psi)
|
37.5 bar
(544 psi)
|
12 bar
(174 psi)
|
≤ 0.5 %
|
|
0 ... 10
|
0 ... 145
|
50 bar
(725 psi)
|
75 bar
(1088 psi)
|
20 bar
(290 psi)
|
≤ 0.5 %
|
|
0 ... 16
|
0 ... 232
|
50 bar
(725 psi)
|
75 bar
(1088 psi)
|
32 bar
(464 psi)
|
≤ 0.5 %
|
|
0 ... 25
|
0 ... 363
|
50 bar
(725 psi)
|
75 bar
(1088 psi)
|
50 bar
(725 psi)
|
≤ 0.5 %
|
Чертеж
SITRANS P250 differential pressure transmitter with socket outlet to EN 175301-803-A, dimensions in mm (inch)
SITRANS P250 differential pressure transmitter with round connector to EN 60130-9, dimensions in mm (inch)
SITRANS P250 differential pressure transmitter with cable, dimensions in mm (inch)
|
Process connections
|
∅
|
Width across flats
|
L
|
X
|
|
|
[mm]
|
[inch]
|
|
[mm]
|
[inch]
|
[mm]
|
[inch]
|
 |
Pipe union with screw-in nipple for outer pipe (stainless steel 1.4305/AISI 303)
|
6
|
0.24
|
a = 10
b = 12
|
24
|
0.95
|
65
|
2.56
|
|
8
|
0.32
|
a = 12
b = 14
|
26
|
1
|
67
|
2.64
|
 |
Female thread G1/8
(stainless steel 1.4305/AISI 303)
|
-
|
-
|
b = 14
|
12
|
0.47
|
53
|
2
|
 |
Pipe union with screw-in nipple for outer pipe (CuZn nickel-plated)
|
6
|
0.24
|
a = 10
b = 12
|
24
|
0.95
|
65
|
2.56
|
|
8
|
0.32
|
a = 12
b = 14
|
25
|
0.99
|
66
|
2.60
|
 |
Hose connection for hose (CuZn nickel-plated, stainless steel 1.4571/AISI 316TI)
|
4
|
0.16
|
a = 10
|
20
|
0.79
|
61
|
2.40
|
|
6
|
0.24
|
a = 10
|
25
|
0.99
|
66
|
2.60
|
 |
Male thread G1/8
(CuZn nickel-plated)
|
-
|
-
|
a = 10
b = 12
|
20
|
0.79
|
61
|
2.40
|
 |
Male thread G1/8
7/16-20 UNF (CuZn nickel-plated)
|
-
|
-
|
a = 14
|
18
|
0.71
|
59
|
2.32
|
Схема подключения
Connection with current output 4 ... 20 mA and plug to EN 175301-803-A
Connection with current output 4 ... 20 mA and round connector
Connection with current output 4 ... 20 mA and permanently fixed cable
Connection with voltage output 0 ... 5 V DC (0 ... 10 V DC) and plug to EN 175301-803-A
Connection with voltage output 0 ... 5 V DC (0 ... 10 V DC) and round connector
Connection with voltage output 0 ... 5 V DC (0 ... 10 V DC) and permanently fixed cable
