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Biochemical Sensors Amplifier modules

OPPM

Oxygen Partial Pressure Measurement Module type 697  The Oxygen Partial Pressure Module OPPM is a polarographic measurement device for the PLUGSYS system. It is used to measure oxygen concentrations with CLARK-style electrodes. The main application is recording of pO2 concentrations in biological fluids e.g. perfusate or effluate of isolated perfused organs, using the corresponding electrodes e.g. Mini Oxygen Electrode Type 733 or ZABS Flow-Through O2 Chemosensor. The digital display indicates either electrode polarisation voltage, O2 concentration as percent or mmHg or the electrode current. The anlog output can be connected to a recorder or any computer-based data acquisition system. The input circuit of the module includes an isolation amplifier (potential separation between sensing electrode and circuit ground of the PLUGSYS measuring system) to avoid measurement problems due to ground loops and leakage currents.

Description
Input	floating single-ended input, max. isolated barrier internally clamped to 300V
Input connector	isolated BNC connector
Polarisation Voltage	adjustable with trimmer between -1 and +1 Volt
Digital Display	3 1/2-digit LED display displays O2 concentration in the ranges 0-199.9% or 0-1999mmHg. Electrode current in the range 0-1.999 (Ampere multiplied with gain factor) or polarisation voltage in the range from -1.000V to +1.000V can be displayed also.
Resolution	± one least significant digit
Accuracy of amplifier	±1% (total accuracy depending on electrode)
Linearity of amplifier	± 0.5%
Gain adjustment	input current ranges for electrode currents: 10-6A, 10-7A, 10-8A, 10-9A, 10-10A full scale "Gain fine" for fine adjustment of gain
Zero adjustment	coarse zero current ranges: 10-8A, 10-9A, 10-10A, 10-11A, 10-12A "Zero fine" for fine adjustment of zero current
Analog output	for simultaneous recording, using the BNC connector on the front panel (± 10 V, output impedance 100 Ohm); the output voltage is also available on the PLUGSYS bus system.The signal output is assigned to the internal connecting lines AV-1 to AV-16 through a jumper
Simulation	two physiological pO2 values can be simulated for calibrating the recording output. This gives the advantage of an easy calibration procedure for a connected chart recorder or data acquisition system
Power supply	+ 5 Volt / 450 mA
Dimensions	module for PLUGSYS system, width 8E (40.5 mm), height 3U (128.7 mm),depth Euroboard (220 mm)
Connector	DIN 41612, 64-pin VG
Weight	0.4 kg

HUGO SACHS ELEKTRONIK-HARVARD APPARATUS GmbH
Gruenstrasse 1 · D-79232 March-Hugstetten · GERMANY
Phone: +49 (0) 76 65 - 92 00-0 · Fax: +49 (0) 76 65 - 92 00-90