OIL FILLED MELT PRESSURE TRANSMITTERS
WE SERIES
Output 4...20mA
MAIN FEATURES
•
• Pressure ranges from:
0-35 to 0-1000 bar / 0-500 to 0-15000 psi
• Accuracy: < ±0.25% FSO (H); < ±0.5% FSO (M)
•
Fluid-filled system for temperature stability
Oil filling meets FDA requirements CFR 178.3620 and
CFR 172.878
•
• Oil filling volume:
WE0 (30mm 3 ); WE1, WE2, WE3 (40mm 3 )
1/2-20UNF, M18x1.5 standard threads; other types available on request
• Other diaphragms available on request
• Autozero function on board / external option
• Drift Autocompensation function (SP version)
• 17-7 PH corrugated diaphragm with GTP+ coating for ranges below 100 bar-1500 psi
GTP+ (advanced protection)
Coating with high resistance against corrosion, abrasion and high temperature
AUTOZERO FUNCTION
All signal variations in the absence of pressure can be eliminated by using the Autozero function.
This function is activated by closing a magnetic contact located on the transmitter housing.
The procedure is permitted only with pressure at zero.
AUTOCOMPENSATES INFLUENCE OF MELT
TEMPERATURE
Thanks to internal self-compensation, the WSP series transmitter cancels the effect of pressure signal variation caused by variation of Melt temperature.
This reduces at the minimum the read error caused by heating of the filling fluid (typical of all sensors built with
“filled” technology).
The WE series of Gefran, are pressure transmitters for using in High temperature environment.
The main characteristic of this series is the capability to read temperature of the media up to 315°C.
The constructive principle is based on the hydraulic trasmission of the pressure.
The fluid-filled system assures the temperature stability.
The phisical measure is transformed in a electrical measure by means the strain-gauge technology.
TECHNICAL SPECIFICATIONS
Accuracy (1)
Resolution
Measurement range
Maximum overpressure
(without degrading performances)
Measurement principle
Power supply
Maximum current absorption
Insulation resistance (at 50Vdc)
Output signal Full Scale (FSO)
Zero balance
(tollerance ± 0.25% FSO)
Zero signals adjustment
(tollerance ± 0.25% FSO)
Span adjustment within ± 5% FSO
Maximum allowed load
Response time (10...90% FSO)
Output noise (RMS 10-400Hz)
Calibration signal
Output short circuit ingress and reverse polarity protection
Compensed temperature range
Operating temperature range
Storage temperature range
Thermal drift in compesated range:
Zero / Calibration / Sensibility
Diaphragm maximum temperature
Zero drift due to change in process temperature (zero)
Zero drift temperature for
Autocompensated version (SP) within the temperature range 20°C-315°C inclusive the drift temperature of the housing
Standard Material in contact with process medium
Thermocouple (model WE2)
Protection degree
(with 6-pole female connector)
H <±0.25%FSO (100...1000 bar)
M <±0.5%FSO (35...1000 bar)
Infinite
0..35 to 0..1000bar
0..500 to 0..15000psi
2 x FS
1.5 x FS above 500bar/7500psi
Extensimetric
10...30Vdc
32mA
>1000 MOhm
20mA
4mA
“Autozero” function
See Manual
See diagram
~ 1ms
< 0.025% FSO
80% FSO
YES
0...+85°C
-30...+105°C
-40...+125°C
< 0.02% FSO/°C
315°C / 600°F
< 0.04 bar/°C
< 0.005 bar/°C 100 ≤ p < 500 bar
0.0022 %FS/°C p ≥ 500 bar
Diaphragm:
• 17-7PH corrugated diaphragm
with GTP+
Stem
• 17-4 PH
STD: type “J” (isolated junction)
IP65
FSO = Full scale output
(1) BFSL method (Best Fit Straight Line): includes combined effects of Non-
Linearity, Hysteresis and Repeatability.
MECHANICAL DIMENSIONS
WE0
WE1
WE2
D1
D2
D3
D4
D5
A
B
C
Ch
[Hex]
1/2 - 20UNF
ø7.8 -0.05
[ ø0.31” -0.002
]
ø10.5 -0.025
[ ø0.41” -0.001
]
ø10.67
[ ø0.42” ]
ø12.7
[ ø0.5” ]
5.56 -0.26
[ 0.22” -0.01
]
11.2
[ 0.44” ]
15.74
[ 0.62” ]
16
[ 5/8” ]
D1
D2
D3
D4
D5
A
B
C
Ch
[Hex]
M18x1.5
ø10 -0.05
[ ø0.394” -0.002
]
ø16 -0.08
[ ø0.63” -0.003
]
ø16 -0.4
[ ø0.63” -0.016 ]
ø18
[ ø0.71” ]
6
-0.26
[ 0.24” -0.01
]
14.8 -0.4
[ 0.58” -0.016
]
19
[ 0.75” ]
19
[ 3/4” ]
WE3
Exposed capillary
D1 1/2-20UNF
D2 .307/.305”
[7.80/7.75mm]
D3 .414/.412”
[10.52/10.46mm]
A .125/.120”
[3.18/3.05mm]
B .318/.312”
[8.08/7.92mm]
C .81”
[20.6mm]
NOTE : dimensions refer to rigid stem length option “4” (153 mm – 6”)
WARNING : For installation use a maximum tightening torque of 56 Nm(500 in-lb)
ELECTRICAL CONNECTIONS
CURRENT OUTPUT (4...20mA, two wires)
6 pin connector
VPT07RA10-6PT2
(PT02A-10-6P)
CONTROLLER
Supply voltage
(10...30Vdc)
Signal
(4...20mA)
AMPL./CONV.
Calibration shunt
+ n.c.
n.c.
n.c.
MAGNETIC
AUTOZERO
6-pin 8-pin
A
C
B
B
A
D
D C
E - F E - F
G - H
Shield drain wire is tied to connector via cable clamp
Supply voltage
(10...30Vdc)
Signal
(4...20mA)
+ n.c.
n.c.
Autozero n.c.
LOAD DIAGRAM AUTOZERO FUNCTION
EXTERNAL
AUTOZERO
6-pin 8-pin
A
C
B
B
A
D
D C
E - F E - F
G - H
42 [1.65"]
The Autozero function is activated through a magnetic contact (external magnet supplied with the sensor).
See the manual for a complete Autozero function explanation.
8 pin connector
PC02E-12-8P Bendix
SUPPLY VOLTAGE
The diagram shows the optimum ratio between the load and supply voltage of the 4...20mA transmitter.
For a correct use, choose any combination of load resistance and supply voltage, in the shaded area.
ACCESSORIES
Connectors
6-pin mating connector (IP65 protection degree)
8-pin mating connector
Extension cables
6-pin connector with 8m (25ft) cable
6-pin connector with 15m (50ft) cable
6-pin connector with 25m (75ft) cable
6-pin connector with 30m (100ft) cable
8-pin connector with 8m (25ft) cable
8-pin connector with 15m (50ft) cable
8-pin connector with 25m (75ft) cable
8-pin connector with 30m (100ft) cable
Other lengths
Accessories
Mounting bracket
Dummy plug for 1/2-20UNF
Dummy plug for M18x1.5
Drill kit for 1/2-20UNF
Drill kit for M18x1.5
Cleaning kit for 1/2-20UNF
Cleaning kit for M18x1.5
Thermocouple for WE2 model
Type “J” (153mm - 6” stem)
CON300
CON307
C08WLS
C15WLS
C25WLS
C30WLS
E08WLS
E15WLS
E25WLS
E30WLS consult factory
Cable color code
6 wires
Conn.
Wire
A Red
B
C
Black
White
D
E
F
Green
Blue
Orange F
G
D
E
H
Cable color code
8 wires
Conn.
Wire
A White
B
C
Red
Green
Black
Blue
Orange n.c.
n.c.
SF18
SC12
SC18
KF12
KF18
CT12
CT18
TTER 601
ORDER CODE
W
Autocompensation (*) SP
Standard -
(*) available for ranges > to 100bar
(*) not available for WE3 version
OUTPUT SIGNAL
4...20mA
E
CONFIGURATION
Rigid stem 0
Rigid stem + flexible 1
With thermocouple 2
Exposed capillary 3
CONNECTOR
Standard
6 pin 6
8 pin 8
ACCURACY CLASS
0.25% FSO
(ranges ≥ 100 bar/1500 psi)
H
0.5% FSO M
RANGE bar
35
50
70
B35U
B05D
B07D
100 B01C psi
500
750
P05C
P75D
1000 P01M
1500 P15C
200 B02C
350 B35D
500 B05C
700 B07C
3000 P03M
5000 P05M
7500 P75C
10000 P10M
1000 B01M 15000 P15M
000
000= Standard version
Special or customized versions available on request
E
-
External autozero
Magnetic autozero
FLEXIBLE LENGTH
(mm / inches) (*)
Standard (WE0)
0
Standard (WE1, WE2)
D
E none
457mm
610mm
F
L
760mm
Standard (WE3)
711mm
18”
24”
30”
28”
Available on request
A 76mm
B 152mm
C 300mm
3”
6”
12”
RIGID STEM LENGTH
(mm / inches) (*)
Standard (WE0, WE1, WE2)
4
5
0
153mm
318mm
Standard (WE3) none
Available on request
6”
12.5”
1 38mm
2 50mm
3 76mm
6 350mm
7 400mm
8 456mm
1.5”
2”
3”
14”
16”
18”
(*) max combined stem/flexible length is 914mm - 36”
Examples
WE2-6-M-B07C-1-4-D-000
Melt pressure transmitter with type “J” thermocouple, 4...20mA output, 6-pin connector, 1/2-20UNF thread, 700 bar full scale, 0,5% accuracy class, 153 mm
(6”) rigid stem, 457mm (18”) flexible capillary.
WSPM0-6-M-P03M-1-4-0-000
Melt pressure transmitter autocompensated version, rigid stem, 4...20mA output,
6-pin connector, 1/2-20UNF thread, 3000 psi full scale, 0,5% accuracy class,
153 mm (6”) rigid stem.
THREAD
Standard
1
4
1/2 - 20 UNF
M18 x 1.5
Sensors are manufactured in compliance with:
- EMC compatibility directive
- RoHS directive
Electrical installation requirements and Conformity certificate are available on our web site: www.gefran.com
GEFRAN reserves the right to make any kind of design or functional modification at any moment without prior notice.
GEFRAN spa via Sebina, 74
25050 PROVAGLIO D’ISEO (BS) - ITALIA tel. 0309888.1 - fax. 0309839063
Internet: http://www.gefran.com
DTS_WE_02-2017_ENG
