Druck PTX7901 Data sheet

The PTX 7900 series combines modular design with
the latest advances in ASIC technology and surface
mounted electronics. This provides a lightweight and
cost effective alternative to pressure gauges and
switches in process industry applications.

At the heart of the transmitter is GE Druck’s own piezo­resistive silicon sensor. This technology is extensively
qualified and proven, for example in aerospace and
subsea programmes which demand the highest levels
of performance and long term reliability.

A Hastelloy isolation diaphragm and electron beam
welded stainless steel body, ensures compatibility with
a wide range of hostile media. A 316 stainless steel
electronics housing with aluminium/bronze end cap,
provides a maintenance-free assembly suitable for the
most arduous environments.

The PTX 7900 pressure transmitter also offers excellent
RFI immunity, meeting the highest level of CE marking
requirements for heavy industrial use.

GE Druck

g

PTX 7900 Series

Pressure Transmitters

䡲 Standard ranges or custom scaled

䡲 Gauge and absolute configurations

䡲 Hastelloy and stainless steel construction

䡲 User accessible zero and span adjustment

䡲 RFI protected to CE Heavy Industrial

䡲 ATEX Intrinsically Safe and Flameproof

versions

OPTIONS

(O) Standard - CE Category 1 Pressure

Accessory to Pressure Equipment directive
(PED) 97/23/EC. Note: ‘Operating Pressure
Range’ is equivalent to maximum working
pressure (Ps) as referred to in the PED

(I) Intrinsically Safe Approval

118 0

II 1G EExia IIC T4 (Ta = 80⬚C)

to ATEX directive 94/9/EC

(D) Flameproof Approval

1180

II 2G EExd IIC T6 (Ta = 70⬚C)
to ATEX directive 94/9/EC
Other T class and ambient temperature
available.

All options are compliant with EMC
Directive 89/336/EEC

EMC Emissions: EN50081-1, EN55022
EMC Immunity: EN61000-6-2: 1999

(10V/m Heavy Industrial).

ORDERING INFORMATION

(1) Select model number:
Code Model
PTX 7900 Base Model - M20 female conduit entry
PTX 7901 Base Model - 1/2” NPT female conduit entry
PTX 7902 Base Model - Pg 13.5 female conduit entry

Code Pressure Connection

1 G1/2Female
2 G1/2Male to BS EN387-1
3 1/2NPT Female
4 1/2NPT Male

Code Approvals

0 None - Safe Area use
I ATEX Intrinsically Safe

D ATEX Flameproof

PTX 7900 - 1 - D Typical Model No.

(2) State pressure range/units

Continuing development can necessitate
specification changes without notice.

STANDARD SPECIFICATIONS

Pressure Measurement

Operating Pressure Ranges

0 to 100, 160, 250 mbar, 500 mbar, 1, 2, 3.5, 7, 10,
20, 35, 70 bar gauge and absolute. 0 to 140, 200,
350, 700 bar sealed gauge and absolute.
Compound ranges available on request.

Note:
Any pressure unit and span can be specified
between 100 mbar and 700 bar F.S.

Overpressure

The operating range can be exceeded by the
following without degrading performance:
12 x for 100 mbar
8 x for 160mbar range
6 x for ranges 250 and 500 mbar
4 x for ranges 1 and 2 bar
3 x for ranges 3.5 to 140 bar (200 bar max)
2 x for ranges 200 to 700 bar (1000 bar max)

Pressure Containment

Gauge ranges:
16 x for 100 mbar
12 x for 160 mbar range
8 x for ranges 250 and 500 mbar
6 x for ranges 1 and 2 bar
4 x for ranges 3.5 to 70 bar (250 bar max)
Absolute/sealed gauge ranges:
250 bar for absolute ranges 100 mbar to 140 bar.
1000 bar for 200 bar to 700 bar ranges

Pressure Media

Fluids compatible with 316L stainless steel and
Hastelloy C276. (NACE compatible grades).

Supply Voltage

9 to 30 V at PTX terminals. (9 to 28V for IS units).
Maximum load (⍀) = 50 x (Supply Voltage - 9).

Supply Sensitivity

0.005% F.S./Volt.

Insulation Resistance

>10 M⍀ @ 500 Vd.c. (@ 20⬚C).

Surge Protection

Withstands 2kV spike.
Spike test conforms to EN61000-4-5.

Output Current

4 - 20 mA (2-wire) for zero to FS pressure.

Performance

Accuracy

Ⳳ0.25% F.S. Combined Non-linearity,
Hysteresis and Repeatability.

Zero Offset and Span Setting

Factory set ±0.05 mA. Further nominal ±5% site
adjustment via non-interacting potentiometers.

Long Term Stability

At standard reference conditions the calibration
will not change by more than 0.1% F.S. per year.

Operating Temperature Range

Ambient: -40 to 100⬚C
Process: -40 to 120⬚C

Temperature Effects

For ranges 500mbar and above, output will not
deviate from room temp calibration by more than:­1% F.S. over - 10⬚ to 50⬚C (0.7%F.S. typical)
2% F.S. over - 20⬚ to 80⬚C (1.5% F.S. typical)

(< 500mbar, values increase pro-rata with span.)

Physical

Pressure Connection

G

1

/

2 female, G

1

/

2 male to BS EN387-1

(DIN 16288),

1

/2 NPT female or 1/2 NPT male.

Electrical Connection

M20

1

/

2 female conduit.

1/2 NPT or PG 13.5 female conduit (via adaptor).

Ingress Protection

Designed to meet IP67 when properly installed
with conduit fitting connection.

Weight

1kg nominal.

INSTALLATION DRAWINGS - Dimensions in mm

Ø60

134

78

36

M20 x 1.5

44

19

38

1/2 NPT Male

G 1/2 Male

G 1/2 or 1/2 NPT

(Female)

PTX 7900 Series

Pressure Transmitters

Druck Limited
Fir Tree Lane, Groby, Leicester, LE6 0FH, UK
[phone] Fax:[phone]
E-Mail: [e-mail] www.druck.com

Agent:

05/04

GE Druck

g

Group