User's Manual

2-5
Theory of Operation
RMT LtdRMT Ltd
RMT LtdRMT Ltd
DX6106
The subsequent description assumes User has already
developed, manufactured and connected to the Optical
Unit some electronic device for Optical Unit
management. (See recommendations in Chapter 3).
The order of measurements with DX6106 device is as
follows:
1. Firstly, individual calibration of device is required
with using of standard gas mixtures.
The Detector output signal is non-linear with respect
to measuring gas concentration. In spite of theoretical
formula the intensity of light which passed through gas
sampling cell, is the integral of various optical rays
from Light Emitter. Also sensitivity of Detector and
performance of Light Emitter are very sensitive to its
operating temperatures.
Detector’s output signals (both measuring and
reference channels) must be measured to calculate
the following ratio as a function of known concentra-
tion of standard mixtures.
Zero ratio at zero gas concentration should
be used for polynomial extrapolation of calibration
results as:
U
U
D
X
D = f(X=0)
m
r
0
r
U
m
U
D =
Operation Overview