Thermo Scientific MIRAN 205B Series, Инструкция по эксплуатации

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Chapter 7 Configuration and Setup
7-13
Compensation
To specify analysis compensations, press
3
(Compensations) from the Analysis Setup
Menu 1. The Analysis Compensations Menu is displayed. Press
1
to specify Temperature
compensation, 2 for Pressure, 3 for Reference, and 4 for Humidity. When finished, press
ENTER
to accept these selections. The display responds "-ACCEPTED-."
Invoking the reference and/or humidity compensation will increase the cycle time. Batch
sampling mode should be used for these compensations.
┌────────────────────────────────────────┐
│╒════════ SUMMARY ════════╕ Select analysis │
││ Logging ─ - ─ Single sample │ compensations: │
││ └─ 10 seconds │ │
││ Alarms ─ - ─√ High _STEL │ 1= √ Temperature │
││ └─√ Low │ 2=_Pressure │
││┌──── Compensations ────┐│ 3= √ Reference │
││√ Temp _Pres √ Ref _H2O │ 4=_Humidity │
│└───────────────────────┘ Enter=Accept │
└────────────────────────────────────────┘
Analysis Compensations Menu
Temperature Compensation
All measurements are susceptible to changes in ambient temperature. In order to
minimize these changes, a temperature sensor has been installed in the analyzer to
measure the temperature. The temperature is then compared to the temperature at the
zero point and a correction in the concentration value is made.
Pressure Compensation
At higher elevations, the ambient pressure is lower that at sea level. These changes can
effect the concentration value. Thus, at higher altitudes, the analyzer displays lower
readings than at sea level. To correct for this difference, measure the ambient pressure
with an external device and enter this pressure value into the analyzer. Do this during the
zero procedure or as part of Application setup. The SapphIRe analyzer then corrects for
this difference by applying a correction factor.
Reference Compensation
All electronic systems experience drift due to a variety of factors including degradation
of parts, ambient conditions, and inherent electronic noise. To minimize these factors,
the SapphIRe analyzer can apply reference wavelength compensation. Reference
Compensation is performed automatically when enabled and when supported by the
application (all standard library applications are supported). The analyzer makes a
measurement of a gas as its analytical wavelength and then moves to a reference
wavelength specified by Thermo Fisher Scientific or by the user (see Reference
Wavelength, below).