CABTF: resistive sensor measurement
Very low temperature measurement for control system
CABTF: resistive sensor measurement

MII Product MicroBox MB-CABTF2
CEA Licence 1998 (DRFMC/DAPNIA)

MicroBox CABTF2: 8 or 16 inputs for resistive sensors: platinium, carbon, cernox, or germanium diode (option). Range of measurement of 10 to 40000 Ohms. Automatic excitation selection (voltage or current). Power supply : 18-60 VDC (Option for 220 VAC) Communication: WorldFIP - Profibus-DP - Modbus RS485,RS232 
Description The MicroBox MB-CABTF2 is a multiplexer of analog inputs for resistive sensor measurements. This system can measure very low temperatures from 1,8 to 350 K with a very high precision. The typical applications are for cryogenic control systems. To avoid the heathing of the sensors with their own measurement current at low temperature, a software chooses automatically to supply them from current mode to voltage mode (for resistance 150 to 40000 Ohms). Internal numeric processing produces directly the 16 conversion values in floating point every 150 ms (6,25 Hz). The MB-CABTF2 can be connected on fieldbus for industrial process control. Available protocols are Modbus through a RS485 or RS232 communication channel, Profibus-DP or WorldFIP FieldBus (IEC standardisation). 
Technical specifications Sensors Inputs Channels: 8 or 16 resistive mixed inputs, Sensors Pt100/Carbon(Ohms): 10, 100, 150, 1000, 10000 T=25°C relative precision (+/-): 4x10-3, 4x10-4, 2.65x10-4, 5x10-4, 1x10-2 Absolute resolution: 2,4mOhm, 2,4mOhm, 2,4mOhm, 100mOhm, 10Ohm Temp. absolute precision: 55K +/- 105mK, 273K +/- 102mK, 20K +/- 7,2mK, 4,2K +/- 1,25mK, 1,8K +/- 10mK Temp. absolute resolution: 6,3mK, 6mK, 0,44mK, 0,25mK, 1mK Temp. relative drift (+/- ppm/°C): 30, 23, 15, 14, 50 Mechanical specifications Input Connectors: DIN 5 Pin 60° ref : 71-430-250 WorldFIP, Profibus-DP, Modbus connector : SubD9 EMC tests: IEC-1000-2,3,4,5,6,8 IEC654-1,2,4 IEC 348, 664A, 950, Protection : IP20, IP66 with external boxes, Temperature : 5 to 40°c Size : H 260, W 116, D 105 mm. Din Rail or wall mounting  
Retailer MII, 7 rue de la grande Ourse BP 8485 - Cergy St Christophe F-95891 CERGY PONTOISE cedex FRANCE phone : 33 01 34 35 34 40 fax : 33 01 34 35 34 41 Email: mii.glc@wanadoo.fr Web site : http://www.mii-systems.com/SiteMII/fr/mii.php4  
#823 - Màj : 26/10/2005

 

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