ANALOG-TO-DIGITAL CONVERTER

Model Neochrom ADC-27/2 and Neochrom ADC-27/4

Purpose

The ADC is designed to measure chromatographic and any analog signal that lies in the range of ADC measurements. There is, for example, a modification of the ADC for temperature/pressure measurement.

Data processing with software NeochromGCWorker or UNICHROM.

Specification:

Analog input channels: 2 or 4
Input voltage ranges −10 mV - +100 mV; −100mV - +1000mV; -1V-+10V
Input resistance 20 MΩ
The number of data bits is 24
The sampling frequency is 100 Hz
Selection of the measurement range from the computer and auto selection
Communication with a computer COM port. (works through a USB-COM converter)

Model Neochrom ADC-WR_v0 and Neochrom ADC-WR_v1

Unlike the previous model, this unit can be connected directly to an ionization detector (FID, ECD, etc.), reducing noise and the overall size of the system. It also provides a detector supply voltage of ±300 V. Data are processed with software NeochromGCWorker or UNICHROM.

The ADC provides the following functions:

amplification of the detector signal;
conversion of the input analog signal to digital;
supplying the detector with the appropriate voltage;

Specification:

Data resolution: 32 bits.
The sampling frequency is 100 Hz
The number of channels is 1 - 8
USB computer connection.

Measurement range of the detector amplifier:

ADC-WR_v0 - basic version - noise 10^-14, limit ± 0.78*10^-7, (typical values)
ADC-WR_v1 - for a capillary column - noise 3*10^-15, limit ±10^-8.

Noise is specified as r.m.s. over a 10 Hz bandwidth, corresponding to the amplitude over a bandwidth of approximately 1 Hz.

Technograph model NeoCHROM Thermo

Purpose

The technograph is built on the basis of the model Neochrom ADC-27/4. Designed for thermocouple temperature measurement and optional pressure measurement. Features include cold junction temperature measurement and compensation, internal calibration and operation with software Neochrom-P/T-Control

Specification:

Number of channels: 4-8;
Temperature range depends on the thermocouple used (typically −100 °C to +600 °C);
Measurement reproducibility: 0.01-0.03;
Measurement accuracy: 0.03-0.1;
Ability to use polynomial approximation and tabular values;
Data output in µV and °C;
Communication with a computer USB/Ethernet;