
Duplication prohibited
MIR 9000
Environnement
S.A
5–17
JULY 2009
5.2.6.4 Fixed
amplification
Connect the probe of channel 1 of the oscilloscope to test point Pt 23.
Connect the probe of channel 2 of the oscilloscope to test point Pt 0 (detector signal).
The amplitude of the signal in Pt23 should be identical to the signal in Pt0, but the base line should be
adjusted with P10 at the maximum negative reading :
−
offset gap zero (potentiometer P10),
−
amplification zero (potentiometer P11).
0 volt
- 1 volt
1 volt
2 volts
Figure 5–8 – Detector signal Oscillogram
Connect the probe of channel 1 of the oscilloscope to test point Pt 11.
In the “Configuration / Software version /Analyzer configuration” menu, adjust the
Static Gain
variable
to 200 (fixed gain at 200). Start a "ZERO-REF" cycle.
Once the "ZERO-REF" cycle has ended, put the analyzer in "ZERO" mode (in "ZERO ANALYZER"
mode with the TIG option).
The baseline of the signal in PT11 should be adjusted to its minimum voltage (without offset) using
P2.
Identify the largest signal using an oscilloscope. Visualize the value in points in the ”Tests / Optical
Bench”
menu. The position measurement corresponds to the S signal and the reference position
corresponds to the SR signal.
The maximum value of the signal is 65535 pts (AD 16 bits saturation).
5.2.6.5
Searching for the saturation line
Make sure that the oscilloscope is in "DC" mode. Using P3, search for the saturation line of the signal
in PT11. Saturation should be close to 13.6 to 14 volts.
Display this on the screen in order to have a visual reference for continuing with the adjustments.
Содержание Envea MIR 9000
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