Keller 35X HT Specifications

Pressure TransmiTTer for Bio-reacTors

series 35 X HT

digiTally comPensaTed / rangeaBle / digiTal and analog ouTPuT

Piezoresistive pressure transmitter for applications in bio-reactors or autoclaves. The transmitter

is compensated up to 150 °C and may be operated continuously or sterilised at this level, inclu-

ding the special circuit electronics.

The transmitters are supplied in absolute or gauge versions, with current or voltage output.

The sensing component is a micro-machined silicon pressure chip of high sensitivity. An

in dependent temperature sensor is integrated on the surface of the silicon chip.

Digital Output of Transmitter

These Series are based on the stable, piezoresisitive transducer and a micro-processor electro-

nics with integrated 16 bit A/D converter. Temperature dependencies and non-linearities of the

sensor are mathematically compensated. With the READ30 software and the KELLER cable

K-107, the calculated pressure can be displayed on a Palmtop, Laptop or PC. The READ30

software also allows the recording of pressure signals and the graphic display on the PC. Up to

128 transmitters can be hooked together to a Bus-system.

Transmitter with Analog Output

The micro-processor integrates a D/A converter of 16 bit for analog signal outputs of 4…20 mA

or 0…10 V. The output rate is 100 Hz (adjustable). The accuracy is diminished by this converting

process by 0,05 %FS. The digital output is available on all transmitters with analog output.

series 35 X HTT

Series 35 X HT

Programming

With the KELLER software READ30 and PROG30, a RS485 converter (i.e. K-102, K-104 or

K-107 from KELLER) and a PC, the pressure can be displayed, the units changed, a new gain or

zero set. The analog output can be set to any range within the compensated range.

ø 21

ø 19

ø 24

ø 18.95

Series 35 X HT

(Manometer Pressure Port)

max.

100

6.5

ø 22

ø 18

Series 35 X HTT

(G 1/2”)

HEX 27

G 1/2"

PIN ASSIGNMENT

Output Function

4…20 mA OUT/GND 1 C

2 Wire +Vcc 3 A

0…10 V GND 1 C

3 Wire OUT 2 B

Digital RS485A 4 D

Series 35 X HTT

Binder

723

+Vcc 3 A

RS485B 5 F

MIL

C-26482

KELLER AG für Druckmesstechnik

CH-8404 Winterthur

+41 52 235 25 25 info@keller-druck.com

KELLER Ges. für Druckmesstechnik mbH

D-79798 Jestetten

+49 7745 9214 0 eurocenter@keller-druck.com

Edition 08/2004

Subject to alterations Companies approved to ISO 9001

www.keller-druck.com

Specications

Standard Pressure Ranges (FS) and Overpressure in Bar

Version Absolute / Gauge -1 1 3 10 30 bar

Overpressure 2 2 5 20 60 bar

(digital) (analog) (analog) Output RS 485 4…20 mA (2 Wire) 0…10 V (3 Wire) Supply (U) 8…28 Vcc 8…28 Vcc 13…28 Vcc Accuracy, Error Band1) (20...120 °C)2) 0,15 %FS 0,2 %FS 0,2 %FS

Linearity + Hysteresis + Repeatability + Temp. Coeff. + Zero + Span Tolerance 2) other compensated temp. ranges on requ-

est

True Output Rate 100 Hz Resolution 0,002 %FS Long Term Stability typ. Range ≤ 2 bar: 2 mbar Range > 2 bar: 0,2 %FS

Load Resistance (Ω) <(U-7V) / 0,02A (2-wire) > 5’000 (3-wire) Electrical Connection – Binder-Plug 723 (5 pole) – MIL C-26482-Plug (6 pole) Insulation 100 MΩ / 50 V Storage- / Operating Temperature Range -20…150 °C (electronics max. 120 °C) Pressure Endurance 10 Million Pressure Cycles 0…100 %FS at 25 °C Vibration Endurance 20 g (5...2000 Hz, max. amplitude ± 3 mm), according to IEC 68-2-6 Shock Endurance 20 g (11 ms) Protection IP 65 optional: IP 67 oder IP 68 (with cable) CE-Conformity EN 61000-6-1 to -6-4 Material in Contact with Media Stainless Steel 316L (DIN 1.4435) / Viton Weight ≈ 280 g Dead Volume Change < 0,1 mm

Remark:

– RS485 pins (for digital output and for programming) is available on all types. – Options: – Switch output, programmable via interface – Special calculations with pressure and temperature

– Different housing-material, oil lling, pressure thread or connector

All intermediate ranges for the analog output are realizable with no surcharge by spreading the standard ranges.

Option: Adjustment directly to intermediate ranges (below 20 pieces against surcharge).

Polynomial Compensation

This uses a mathematical model to derive the precise pressure value (P) from the signals measured by the pressure sensor (S) and the temperature sensor (T). The microprocessor in the transmitter calculates P using the following polynomial:

P(S,T) = A(T)xS0 + B(T)xS1 + C(T)xS2 + D(T)xS

With the following coefcients A(T)…D(T)

depending on the temperature:

A(T) = A B(T) = B C(T) = C D(T) = D

T0 + A

T0 + B

T0 + C

T0 + D

T1 + A

T1 + B

T1 + C

T1 + D

T2 + A

T2 + B

T2 + C

T2 + D

The transmitter is factory-tested at various levels of pressure and temperature. The corresponding measured values of S, together with the exact pressure and temperature values, allow the

coefcients A0...D3 to be calculated. These are

written into the EEPROM of the microprocessor.

When the pressure transmitter is in service, the microprocessor measures the signals (S) and

(T), calculates the coefcients according to the

temperature and produces the exact pressure value by solving the P(S,T) equation.

Calculations and conversions are performed at least 400 times per second.

Accessories Series 30

Each Series 30 transmitter also integrates a digital interface (RS485 halfduplex) which you can make use of: Connect the transmitter to a PC or Laptop via a converter RS232-RS485 (i.e. K-102, K-104 or K-107). Two programs are offered:

PROG30: Instrument Settings

•

Call up of information (pressure- and temperature range, version of software etc.)

• Indication of actual pressure value

• Selection of the units

• Setting of a new zero and gain for the

READ30: Data collection with graphs

• Fast read-out and viewing of the pressure signals in a graph

• Documentation of dynamic measurements

• Up to 16 transmitters on one serial connection (Bus-operation)

Software PROG30

transmitter

• Reprogramming of the analog output (i.e. different unit, other pressure range)

• Setting of the instrument address

(for Bus-operation)

• Programming of the switch output

• Changing the output rate

You can also tie up the transmitters into your own software. You have then a documentation, a DLL and numerous examples at your disposal.

Changing the plug connector (optional)

Laboratory applications require the same transmitter to be used at different measurement points with different electrical connection arrangements. To accommodate such applications, Keller can supply different connectors matching with the internal standard plug. This makes it easy to exchange the electrical connector of the transmitter.

KELLER AG für Druckmesstechnik CH-8404 Winterthur