ADC FOR AUTOMATION OF OLD CHROMATOGRAPHS

The hardware and software complex for measuring the signals of chromatographs "Meta-chrome" (complex) is designed to automate the old fleet of chromatographs of the type LHM, model-3700, series "Color", etc. in terms of measuring the chromatographic signal and automating the processing of chromatographic information. The complex consists of two interconnected functional modules:
an analog-to-digital converter (ADC unit) and a chromatographic information processing program "NetChrom" (hereinafter referred to as the processing program).
technical specifications
The number of analog inputs is from 1 to 8.
Data exchange with a personal computer is via the standard RS—232C interface.
The input impedance is at least 1×106 Mohm.
The voltage resolution is 4,768 MV/unit.code (the number of effective digits is 19). The linear dynamic voltage range is at least 0.5×106. When an external electrometric amplifier is connected with automatic switching of measurement limits, the dynamic range is expanded by 100 times. Switching control is automatic.
The input voltage range is from minus 2.5 to 2.5 V.
The minimum measured half—width of the chromatographic peak is 0.5 s .
The level of fluctuation noise brought to the input is no more than 1×10-5 V.
The reduced error of the linearity of the signal conversion is no more than ± 0.1%.
Electric power supply from a single—phase AC network with a voltage from 187 to 242 V, frequency (50 ± 1) Hz, operating mode - continuous.
Power consumption (without a personal computer), no more than — 15 VA.
Overall dimensions (width × depth × height), no more than 300×215×60 mm.
Weight, not more than 2.7 kg.