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Operation
Diagnostics Menu
Thermo Fisher Scientific
Model 15
i
Instruction Manual
3-57
PRESSURE: 753.0 mmHg
RANGE AVG DIAGS ALARM
The Flow screen (read only) displays the flow rate. The flow is measured by
internal flow sensors. For more information, see
Figure 1–1
.
●
In the Main Menu, choose Diagnostics >
Flow
.
SAMPLE FLOW: 1.108 LPM
RANGE AVG DIAGS ALARM
The Sample/Reference Ratio screen (read only) displays the ratio of the
intensities of the light source through the sample (HCl) side and reference
(N
2
) side of the correlation wheel. Normally, when zero air is being
sampled, the sample/reference ratio is between 1.05 and 1.15. A ratio
outside may indicate that the correlation wheel is dirty or leaking gas.
●
In the Main Menu, choose Diagnostics >
Sample/Ref Ratio
.
SAMPLE REFERENCE RATIO:
S/R: 1.100000
RANGE AVG DIAGS ALARM
The AGC Intensity screen (read only) displays the intensity (in Hertz) of
the reference channel Automatic Gain Control (AGC) circuit. The AGC
circuit optimizes the noise and resolution levels of the analyzer. The AGC
intensity reading should be about 250,000 Hertz.
●
In the Main Menu, choose Diagnostics >
AGC Intensity
.
Flow
Sample/Reference
Ratio
AGC Intensity