Keller Swiss-Built Series 35X HT-HTT High temperature high accuracy analog digital output pressure transmitter

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, including 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 independent 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
electronics 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. Programming With the KELLER software READ30 and PROG 30, 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.

SPECIFICATIONS
STANDARD PRESSURE RANGES (FS) AND OVERPRESSURE IN BAR
Version Absolute / Gauge -1 1 3 10 30 bar
Overpressure 2 2 5 20 60 bar
2 Wire 3 Wire
(digital) (analog) (analog)
Output RS485 4…20 mA 0…10 V
Supply (U) 8…28 Vcc 8…28 Vcc 13…28 Vcc
Accuracy, Error Band
1)    
(20…120 °C)
2)
0,15 %FS 0,2 %FS 0,2 %FS
1)
Linearity + Hysteresis + Repeatability + Temp. Coeff. + Zero + Span Tolerance        
2)
other compensated temp. ranges on request
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 > 10 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 IP65   optional: IP 67 or IP68 (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 mm3

 

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