Main Features

• Fully Microprocessor-Controlled
• Self-calibrating
• ppm O 2or % saturation direct reading
• Long-life Teflon® membrane electrode
• Fully temperature compensation
• 0-2ppm and 0-20ppm ranges
• Recorder, printer and computer output

The Model 360 allows accurate laboratory measurements of the dissolved oxygen in aqueous solutions and is particularly suited for long-term data recording with both strip-chart recorders (analogue output) and a personal computer (serial RS-232 interface).

This instrument allows use of any "polarographic" sensor (Clark cell) with gold and silver electrodes and PTFE membrane. The AMEL cell Model 332/P offers all the advantages of reduced dimensions (12 mm diameter) for easy use with adapters for BOD bottles (AMEL accessory Model 332/BOD) and a practical cartridge-type, disposable membrane. The AMEL cell is also fitted with two embedded temperature sensors: one measuring and the other compensating.

The Model 360, totally microprocessor-controlled, is equipped with two measuring ranges calibrated directly in ppm of O 2and one range in % of saturation. A separate display allows to monitor the temperature at any moment. The auto-calibration function, allows a quick and precise standardization of both instrument and cell, using as reference the atmospheric oxygen: to that purpose the instrument includes a complete values table of the atmospheric oxygen concentration versus temperature and barometric pressure.

The auto-stability function grants valid measurements checking for read data to stay stable during the allotted time between two predetermined limits. Other remarkable characteristics of this flexible instrument are: the RS-232 interface which has the dual function of direct output to an impact printer or for connection to a computer.

The analogue output for strip-chart recorders. Numeric values as well as the operating parameters, are entered with a fully-sealed membrane keyboard which has both a tactile feel and an audible response. Two large 7-segment LCD displays give a clear presentation of data. Active functions and the operating modes are immediately indicated by a series of LED annunciators.

Display	Measuring Range	Resolution	Precision
ppm O2 00.000 - 19.999	00.000 - 19.999	± 0.001	± 2%
ppm O2 0.0000 - 1.9999	0.0000 - 1.9999	± 0.0001	± 2,5%
% SAT 000.00 - 199.99	000.00 - 199.99	± 0.01	± 2%
°C -199.9 +199.9	10 +120°C	± 0.1	± 0,5%

Further Details

AUTOMATIC TEMPERATURE COMPENSATION within ±20°C (with respect the calibration value) RECORDER OUTPUT 1V full-scale POLARISATION VOLTAGE -800mV (adjustable from -10 up to -2000mV) ATMOSPHERIC PRESSURE 400 - 1200 mm Hg PRINTING RATE variable from 1.0 to 199.9 seconds BAUD RATE 1200, 2400, 4800, 9600,19,200, 38,400 (keyboard selectable) POWER 110 - 220Va.c.—50-60Hz—15VA KEYBOARD membrane-type (silk-screened polycarbonate) CABINET aluminium cast refined with acid-resistant epoxy paints. Dimensions 200x180 mm, height 120 mm. Weight (with stand and without electrodes) 1.2 Kg.