Gefran IX SERIES Specification Sheet

IMPACT MELT PRESSURE TRANSMITTERS FOR

APPLICATIONS IN POTENTIALLY EXPLOSIVE

ATMOSPHERES IX SERIES 4-20mA Output

The “IMPACT” series of Gefran, are pressure transmitters,
without transmission fluid, for using in High temperature envi­ronment (350°C).
Medium pressure is transferred directly to the sensitive silicon
element via a thick diaphragm.
Strain is transduced by a micro-worked silicon structure (MEMS).
The sensors are based on a piezoresistive technology, have been
checked following the NAMUR NE21 and NE43 recommenda­tions and are in compliance with:

-EMC standard

-European RoHS standard
“IMPACT” is Gefran’s exclusive series of high-temperature pres­sure sensors that use the piezoresistive principle.
The main characteristic of “IMPACT” sensors is that they do not
contain any transmission fluid.

The sensitive element, directly positioned behind the contact
membrane, is realised in silicon through microprocessing tech­niques.
The micro structure includes the measurement membrane and
piezoresistors.
The minimum deflection required by the sensitive element
makes it possible to use very robust mechanics.
The process contact membrane can be up to 15 times thicker
than the membrane used in traditional Melt sensors.

ADVANTAGES

- Total compatibility with the European RoHS Directive

- High strength

- Long life

- Working temperature: up to 350°C

- Excellent read stability over time

- Fast response time

MAIN FEATURES

• Pressure ranges:
0-100 to 0-1000 bar / 0-1500 to 0-15000 psi

• Accuracy: < ±0.25% FSO (H); < ±0.5% FSO (M)

• Standard threading 1/2-20UNF, M18x1.5; other versions on
request

• Other types of diaphragms are available on request

• Autozero function on board / external option

• 15-5 PH stainless steel diaphragm GTP+ coated

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
in the electronic transmitter or by an external contact.
The procedure is allowed only at zero” pressure.
The Autozero function should be activated ONLY when the sen­sor is completely installed on the system.

Power with galvanic insulated barrier with 30V maximum voltage.
For version IX2, the thermocouple must be connected to EX-i circuits with
devices assigned to galvanic separation and with protection mode [EX
ia] IIC.

EC-Type Examination Certificate number:

IMQ 09 ATEX 002

TECHNICAL SPECIFICATIONS

Accuracy (1)

Resolution 16 Bit

Measurement range

Maximum overpressure
(without degrading performances)

Measurement principle Piezoresistive

Power supply 10...30Vdc

Maximum current absorption 23mA

Insulation resistance (50Vdc) >1000 MOhm

Output signal Full Scale FSO 20mA

Zero balance
(tollerance ± 0.25% FSO)

Zero signals adjustment
(tollerance ± 0.25% FSO)

Maximum allowed load See diagram

Response time (10...90% FSO) 8ms

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

Calibration signal 80% FSO

Output short circuit ingress and
reverse polarity protection

Compensed temperature range housing 0...+85°C

Operating temperature range housing -20...+85°C

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

Maximum diaphragm temperature 350°C / 660°F

Zero signal variation due to process
temperature variation in range
(20-350°C)

Span signal variation due to process
temperature variation in range
(20-350°C)

Std contact diaphragm with process 15-5 PH GTP+

Thermocouple (model IX2)

Protection degree
(with 6-pole female connector)

Electrical connection

FSO = Full scale output (1) BFSL method (Best Fit Straight Line):
includes combined effects of Non-Linearity, Hysteresis and Repeatability.

H <±0.25%FSO

M <±0.5%FSO

0..100 to 0..1000bar

0..1500 to 0..15000psi

1.5 x FS (maximum pressure
1200bar/17400psi)

4mA

“Autozero” function

YES

< ± 1,2%FSO

< ± 1%FSO

STD: type “J” (isolated junction)

type “K” (on request)

IP65

Conn. 6-pin VPT07RA10-6PT

(PT02A-10-6P)

Conn. 8-pin PC02E-12-8P

Cable output