Gefran KN SERIES Data Sheet

NaK FILLED MELT PRESSURE TRANSMITTERS

KN SERIES Voltage output

The KN Series are for use in high temperature applications
where the process temperatures may reach 538°C (1000°F)
such as high temperature engineered polymers.
The K Series utilizes standard melt pressure principles and
construction, but uses a near incompressible (NAK Sodium
Potassium) for pressure transmission.
The K Series strain sensing technology is bonded foil strain
gage.

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 gua-
rantees stability at working temperature (NaK).

Liquid conforming to RoHS Directive.
NaK is defined as a safe substance (GRAS).

•Quantity of NaK contained per model: KN0 series (30mm3)
[0.00183 in3], KN1, KN2, KN3 (40mm3) [0.00244 in3]

•1/2-20UNF, M18x1.5 standard threads; other types avai-
lable on request

• Autozero function on board / external option

• Stem drift Autocompensation function (SP version)

• 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 100 bar-1500 psi up to 400°C (750°F)

• Material of stem 17-4PH

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.
he procedure is permitted only with pressure at zero.

AUTOCOMPENSATED INFLUENCE OF MELT
TEMPERATURE

Thanks to internal self-compensation, the KSP 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 drift values declared in the version with Autocompensation
are valid for media temperatures up to 500°C.

TECHNICAL SPECIFICATIONS

Accuracy (1)

Resolution Infinite

Measurement range

Maximum overpressure
(without degrading performances)

Measurement principle Extensimetric

Power supply

Maximum current absorption 25mA

Insulation resistance (at 50Vdc) >1000 MOhm

Output signal Full Scale (FSO)

Zero balance
(tolerance ± 0.25% FSO)

Zero signals adjustment
(tolerance ± 0.25% FSO)

Span adjustment within ± 5% FSO See Melt manual

Maximum allowed load 1 mA

Response time (10...90% FSO) ~ 1ms

Output noise (RMS 10-400Hz) < 0.025% FSO

Calibration signal 80% FSO

Output short circuit and reverse
polarity protection

Compensated temperature range 0...+85°C

Operating temperature range -30...+105°C

Storage temperature range -40...+125°C

Thermal drift in compesated range:
Zero / Calibration / Sensibility

Diaphragm maximum
temperature

Zero drift (zero)

Zero drift temperature for
Autocompensated version (SP)
within the temperature range
20°C-500°C inclusive the drift
temperature of the housing

Thermocouple (model KN2)

Protection degree
(with 6-pole female connector)

FSO = Full Scale Output
(1) BFSL method (Best Fit Straight Line): includes combined effects of Non­Linearity, Hysteresis and Repeatability.

H <±0.25%FSO (100...1000 bar)

M <±0.5%FSO (35...1000 bar)

0..35 to 0..1000bar

0..500 to 0..15000psi

2 x FSO

1.5 x FSO over 700bar/10000psi

15..30Vdc N, C

10..30Vdc B, M

5Vdc (M) - 10Vdc (N)

5,1Vdc (B) - 10,1Vdc (C)

0Vdc (M, N)

0.1Vdc (B, C)

“Autozero” function

YES

< 0.02% FSO/°C

538°C

1000°F

< 3,5bar/100°C /

< 28 psi/100°F

< 0.005 bar/°C 100 ≤ p < 500 bar

0.0022 %FS/°C p ≥ 500 bar

STD : tipo “J”

(isolated junction)

IP65

MECHANICAL DIMENSIONS

KN0

D1

1/2 - 20UNF

D2

[ ø0.31” -0.002 ]

D3

[ ø0.41” -0.001 ]

D4

D5

A

B

C

KN2

ø7.8 -0.05

ø10.5 -0.025

ø10.67

[ ø0.42” ]

ø12.7

[ ø0.5” ]

5.56 -0.26

[ 0.22” -0.01 ]

11.2

[ 0.44” ]

15.74

[ 0.62” ]

Ch

[Hex]

16

[ 5/8” ]

KN1 KN3

D1

M18x1.5

[ ø0.394” -0.002 ]

[ ø0.63” -0.003 ]

[ ø0.63” -0.016 ]

A

[ 0.24” -0.01 ]

B

[ 0.58” -0.016 ]

C

ø10 -0.05

ø16 -0.08

ø16 -0.4

ø18

[ ø0.71” ]

6 -0.26

14.8 -0.4

19

[ 0.75” ]

19

[ 3/4” ]

D2

D3

D4

D5

Ch

[Hex]

Exposed capillary

D1 1/2-20UNF

.307/.305”

D2

[7.80/7.75mm]

.414/.412”

D3

[10.52/10.46mm]

.125/.120”

A

[3.18/3.05mm]

.318/.312”

B

[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)

42 [1.65"]

ELECTRICAL CONNECTIONS

VOLTAGE OUTPUT (M, N, B, C)

Power supply 15..30Vdc

CONTROLLER

AMPLIF.

Shield drain wire is tied to connector via cable clamp

8-pin connector

Connector
PC06A-12-88 (SR)

A
B
C
D
E
F

G

H

Connect the cable sheathing
to the side of the instrument.

R-Cal

None connection

Supply Voltage

Supply Voltage

Signal

Signal

Calibration shunt

E +

Supply

S +

Signal

E -

Supply

S -

Signal

MAGNETIC

AUTOZERO

6-pin

+

C

-

D

+

A

B

-

E - F

Magnetic Autozero
version

A = Excitation + (white)
B = Signal + (red)
C = Excitation - (green)
D = Signal - (black)
E = R-Cal (blue)
F = R-Cal (brown)
G = no connection
H = no connection

External Autozero
version

A = Excitation + (white)
B = Signal + (red)
C = Excitation - (green)
D = Signal - (black)
E = Autozero (blue)
F = Autozero (brown)
G = no connection
H = no connection

Supply Voltage

Supply Voltage

Signal

Signal

Autozero

EXTERNAL

AUTOZERO

6 pin connector

VPT07RA10-6PT2

(PT02A-10-6P)

6-pin

+

C

-

D

+

A

B

-

8 pin connector

PC02E-12-8P Bendix

E - F

AUTOZERO FUNCTION

The Autozero function
is activated through a
magnetic contact (external
magnet supplied with the
sensor).
See the manual for a com­plete Autozero function
explanation.

ACCESSORIES

Connectors

6-pin female connector (IP65 protection degree) CON300
8-pin female connector CON307

Extension cables

6-pin connector with 8m (25 ft) cable C08WLS
6-pin connector with 15m(50 ft) cable C15WLS
6-pin connector with 25m (75 ft) cable C25WLS
6-pin connector with 30m (100 ft) cable C30WLS
8-pin connector with 8m (25 ft) cable E08WLS
8-pin connector with 15m (50 ft) cable E15WLS
8-pin connector with 25m (75 ft) cable E25WLS
8-pin connector with 30m (100 ft) cable E30WLS
Other lengths on request

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 PKIT309
Autozero pen PKIT312
Thermocouple for KN2 model

Type “J” (153mm - 6” rigid stem)

TTER 601

Cable color code

6 wires

Conn. Wire

A Red

B

Black

C White

D Green

E Blue

F Orange

Codice colore

cavo 8 wires

Conn. Wire

A White

B Red

C Green

D Black

E Blue

F Orange

G n.c.

H n.c.

ORDER CODE

Autocompensation (*) SP

Standard -

(*) available for ranges > to 100bar
(*) not available for version KN3

OUTPUT SIGNAL

0 .. 5Vdc M

0 .. 10Vdc N

0.1 .. 5.1Vdc B

0.1 .. 10.1Vdc C

VERSION

Rigid stem 0

Rigid + flexible stem 1

With thermocouple 2

Exposed capillary 3

CONNECTOR

Standard

6 pin 6
8 pin 8

ACCURACY CLASS

(ranges ≥100 bar/1500 psi)

0.25% FSO
H

0.5% FSO M

RANGE

bar (*) psi (*)

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 avai-

lable for pressure range ≤ 70 bar

(1000 psi)

THREAD

Standard

1/2 - 20 UNF 1

M18 x 1.5 4

K

000

000= Standard version
Special or customized versions
available on request

E External autozero

- Magnetic autozero

CONTACT DIAPHRAGM

INCONEL 718 (538°C*)

I

S 15-5 PH (400°C*)

HASTELLOY C276

H

(300°C*)

(*) max temperature

FLEXIBLE STEM LENGTH (*)

(mm / inches)

Standard (KN0)

0 none

Standard (KN1, KN2)

D 457mm 18”
E 610mm 24”

F 760mm 30”

Standard (KN3)

L 711mm 28”

Available on request

A 76mm 3”
B 152mm 6”
C 300mm 12”

RIGID STEM LENGTH (*) (mm

/ inches)

Standard (KN0, KN1, KN2)

4 153mm 6”
5 318mm 12.5”

Standard (KN3)

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”

Examples

KN2-6-M-B07C-1-4-D-I-000

Melt pressure transducer with type “J” thermocouple, 0..10Vdc output, 6-pin connector, 1/2-20UNF thread, 700 bar pressure range, 0.5% accu­racy class, 153 mm (6”) rigid stem, 457mm (18”) flexible stem, Inconel 718 diaphragm.

KSPM0-6-M-P03M-1-4-0-I-000

Melt pressure transducer autocompensated version, rigid stem, 0..5Vdc output, 6-pin connector, 1/2-20UNF thread, 3000 psi pressure range,

0.5% accuracy class, 153 mm (6”) rigid stem Inconel 718 diaphragm.

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 spa reserves the right to make any kind of design or functional modification at any moment without prior notice

DTS_KN_11-2016_ENG