SMART HART NaK FILLED MELT PRESSURE TRANSMITTERS
HKE SERIES - CURRENT OUTPUT
AND PERFORMANCE LEVEL ‘c’ 4...20mA Output
The HKE series of Gefran are pressure transmitters with
HART communication protocol for using in high temperature environment.
The main characteristic of this series is the capability to
read temperature of the media up to 538°C.
The constructive principle is based on the hydraulic trasmission of the pressure.
The fluid-filled system assures the temperature stability.
The physical measure is transformed in a electrical measure by means of strain-gauge technology.
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)
• Hydraulic transmission system for pressure signal
guarantees stability at working temperature (NaK).
• Liquid conforming to RoHS Directive. NaK is defined as a
safe substance (GRAS)
• Quantity of NaK contained per model: HKE0 series
(30mm³) [0.00183 in³], HKE1, HKE2, HKE3 (40mm³)
[0.00244 in³]
• 1/2-20UNF, M18x1.5 standard threads; other types
available on request
• Autozero function on board / external option
• Inconel 718 diaphragm with GTP+ coating for temperatures
up to 538°C (1000°F)
• 15-5 PH diaphragm with GTP+ coating for temperatures up
to 400°C (750°F)
• Hastelloy C276 diaphragm for temperatures up to 300°C
(570°F)
• 17-7 PH corrugated diaphragm with GTP+ coating for
ranges below 100bar-1500psi (up to 400°C/750°F)
• Stem material: 17-4 PH
GTP+ (advanced protection)
Coating with high resistance against corrosion, abrasion
and high temperature
AUTOZERO FUNCTION
All signal variations in 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.
This function can be activited via HART as well.
TECHNICAL SPECIFICATIONS
Accuracy (1)
Resolution 16 bit
Measurement range
Rangeability 3:1
Maximum overpressure (without
degrading performances)
Measurement principle Extensimetric
Power supply 13...30Vdc
Maximum current absorption
Output signal Full Scale (FSO) 20mA
Zero balance (tollerance ± 0.25%
FSO)
Calibration signal 80% FSO
Power supply polarity reverse
protection
Compensated temperature range
housing
Operating temperature range
housing
Storage temperature range housing -40...+125°C
Thermal drift in compensated range:
Zero / Calibration / Sensibility
Diaphragm maximum temperature 538°C / 1000°F
Zero drift due to change in process
temperature (zero)
Thermocouple (model HKE2) STD: type “J” (isolated junction)
Protection degree
(with 6-pole female connector)
FSO = Full scale output :
(1) BFSL method (Best Fit Straight Line): includes combined effects of Non-Linearity,
Hysteresis and Repeatability
H <±0.25%FSO (100...1000 bar)
M <±0.5%FSO (17...1000 bar)
0..17 to 0..1000bar
0..250 to 0..15000psi
2 x FS
1.5 x FS above 700bar/10000psi
23mA
(40mA with relay optional)
4mA
YES
0...+85°C
-30...+85°C
< 0.02% FSO/°C
< 3.5 bar/100°C / < 28 psi/100°F
IP65
MECHANICAL DIMENSIONS
HKE0
HKE1
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” ]
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)
MECHANICAL DIMENSIONS
HKE2
HKE3
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” ]
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)
SELF DIAGNOSTICS (ONLY FOR PL’C’ VERSIONS)
900
R ( Ω)
Below the conditions detected by the sensor self-diagnostics:
· Cut cable / device non connected / broken power supply, output ≤ 3.6mA
· Pin detachment output ≤ 3.6mA
· Broken primary element ≥21mA
· Pressure above 200% of the span, output ≥21mA
· Voltage monitor in case of overvoltage/undervoltage/voltage variation in the electronics, output ≤ 3.6mA (*)
· Program sequence error, output ≤ 3.6mA (*)
· Overtemperature on the electronics, output ≤ 3.6mA (*)
· Error on the primary element output or on the first amplification stage, output ≥ 21mA
(*) In such conditions the Alarm Type can be programmed via HART at ≥ 21 mA.
OPTIONAL RELAY OUTPUT FOR EXCESS PRESSURE PROTECTION
Safety relay characteristics:
- Activation threshold to be defined in the order code
· Rated carry current: 1A
· Rated voltage: 24Vdc ± 20%
· Switch accuracy: 2 x sensor accuracy
· Hysteresis: 2% FSO
NAMUR COMPLIANCE (ONLY FOR PL’C’ VERSIONS)
The sensors are tested according to Namur NE21 recommendations.
The same compatibility is valid for the NE43 Namur recommendation
with the following sensor behaviour in case of breakdown:
· Cut cable: breakdown information as the signal is ≤ 3.6mA
· Device not connected: breakdown information as the signal is ≤ 3.6mA
· Broken power-supply: breakdown information as the signal is ≤ 3.6mA
or in case of performance problems:
· Broken primary element ≥ 21mA
· Pressure above 200% of the span, output ≥21 mA
· Others ≤ 3.6mA(*)
(*) In such a condition the Alarm Type can be programmed via HART at ≥ 21 mA.
Note: in all the remaining situations, the output signal is always included between 3.8 and 20.5mA.
Recommendation: the error level set by the customer
(e.g. maximum pressure value) has to be inside the nominal
range.
SUPPLY OUTPUT RELAY
STATUS
OFF - OPEN
ON < X%fs CLOSED
ON > X%fs OPEN
ON Output ≤ 3.6mA OPEN
ON Output ≥ 21mA OPEN
AUTOZERO FUNCTION
LOAD DIAGRAM
800
700
600
500
400
300
200
100
0
10 12 14 16 18 20 22 24 26 28 30 32
Vcc (V)
The diagram shows the optimum ratio between load and power supply
for transmitters with 4…20mA output.
For correct function, use a combination of load resistance and voltage
that falls within the two lines in the graph above.
WORKING AREA
The Autozero function is activated through a
magnetic contact (external magnet supplied
with the sensor).
The Autozero function can be activated through
HART command as well.
See the manual for a complete Autozero function explanation.
ELECTRICAL CONNECTIONS
CURRENT OUTPUT
The cable shield is tied to both sides, i.e. to the sensor connector and to the controller
RELAY OUTPUT
The cable shield is tied to both sides, i.e. to the sensor connector and to the controller
6 pin Connector VPT07RA10-6PT2
(PT02A-10-6P)
8 pin Connector
(PC02E-12-8P) Bendix
CABLE OUTPUT (1/2 14-NPT) L = 1 m
Current output
Relay output
Magnetic Autozero/External Autozero
Red V+
Black V- (output)
Blue Cal+ / Autozero
Orange Cal- / Autozero
Green GND
ACCESSORIES
Connectors
6-pin female connector (IP65 protection degree) CON300
8-pin female connector CON307
Extension cables
6-pin connector with 8m (25ft) cable C08WLS
6-pin connector with 15m (50ft) cable C15WLS
6-pin connector with 25m (75ft) cable C25WLS
6-pin connector with 30m (100ft) cable C30WLS
Accessories
Mounting bracket SF18
Dummy plug for 1/2-20 UNF SC12
Dummy plug for M18x1,5 SC18
Drill kit for 1/2 -20 UNF KF12
Drill kit for M18 x 1,5 KF18
Cleaning kit for 1/2-20 UNF CT12
Cleaning kit for M18x1,5 CT18
Fixing pen clip PKIT 1032
Autozero pen PKIT 378
White V+
Green V- (output)
Yellow Cal+ / Autozero
Pink Cal- / Autozero
Blue Relay+
Brown Relay-
Gray Supply- (Relay)
Black GND
Cable color code
Conn. Wire
A-2 Red
B-4 Black
C-1 White
D-6 Green
E-7 Blue
F-3 Orange
5 Grey
8 Pink
Thermocouple for HKE2 model Type “J”
(153mm - 6” rigid rod)
TTER 601
ORDER CODE
HK
OUTPUT SIGNAL
4...20mA E
VERSION
Rigid rod 0
Rigid + flexible rod 1
With thermocouple 2
Exposed capillary 3
CONNECTOR
6 pin 6
8 pin 8
NPT Cable N
ACCURACY CLASS
0.25% FSO (ranges
≥ 100 bar/1500 psi)
0.5% FSO M
bar (*) psi (*)
17 B17U 250 P25D
35 B35U 500 P05C
50 B05D 750 P75D
70 B07D 1000 P01M
100 B01C 1500 P15C
200 B02C 3000 P03M
350 B35D 5000 P05M
500 B05C 7500 P75C
700 B07C 10000 P10M
1000 B01M 15000 P15M
(*) Hastelloy diaphragm not available for
pressure range ≤ 70 bar (1000 psi)
THREADING
1/2 - 20 UNF 1
M18 x 1.5 4
Example
HKE1-6-M-B07C-1-4-D-I-P-0
Melt pressure transducer 4...20mA output with HART protocol, 6-pin connector, 0.5% accuracy,
700 bar pressure range, 1/2-20 UNF threading, 153 mm (6”) rigid rod, 457 mm (18”) flexible rod,
Inconel 718 diaphragm, Performance Level=’c’.
Sensors are manufactured in compliance with:
- EMC compatibility directive
- RoHS directive
- machinery directive
Electrical installation requirements and conformity certificate are available on our web site: www.gefran.com
H
MEASUREMENT RANGE
Standard
0000
Output relay version (activation threshold):
X = no relay B = 80% fs
A = 70% fs C = 90% fs
000= Special executions
E External Autozero (*)
0 Magnetic Autozero
(*) as an alternative to the CAL
function
P Performance Level=’c’
0 Standard 4...20mA
CONTACT DIAPHRAGM
I
S 15-5 PH (400°C*)
H
(*) max temperature
FLEXIBLE ROD LENGTH (*)
(mm/inches)
Standard (HKE0)
0 none
Standard (HKE1, HKE2)
D 457mm 18”
E 610mm 24”
F 760mm 30”
Standard (HKE3)
L
Available on request
A 76mm 3”
B 152mm 6”
C 300mm 12”
RIGID ROD LENGTH (*)
(mm/inches)
Standard (HKE0, HKE1,HKE2)
4 153mm 6”
5 318mm 12.5”
Standard (HKE3)
0 none
Available on request
1 38mm 1,5”
2 50mm 2”
3 76mm 3”
6 350mm 14”
7 400mm 16”
8 456mm 18”
(*) max. combined rigid / flexible
stem length is 1000mm - 39”
X 000 X 0
INCONEL 718 (538°C*)
HASTELLOY C276
(300°C*)
711mm 28”
GEFRAN spa reserves the right to make any kind of design or functional modification at any moment without prior notice.
DTS_HKE_11-2016_ENG
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