Rosemount Analytical NGA 2000, Руководство пользователя

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M
AINTENANCE AND
T
ROUBLESHOOTING
748332-D Rosemount Analytical June 1997 4-5
NGA 2000 Non-Dispersive Infrared Analyzer
1. Open Platform front panel, if present.
Do not place hands or fingers in Platform front handles when the front panel is
open. Dropping front panel while hand or fingers are inside either handle can
cause serious injury.
2. Open Analyzer Module front panel
3. Access the oscillator tune value in the Primary Variable Parameters menu.
4. Adjust oscillator tune knob to its maximum setting and then turn it
counterclockwise to 80 % of that maximum setting.
5. Access the detector signal value in the Modulation Check menu.
6. Flow zero gas (nitrogen) through the sample cell until the display reading
stabilizes.
The shutter is a delicate component with only a six-degree rotation. Take care
when making the required adjustments.
7. Using an appropriate screwdriver that will fit through the Source Balance
Adjustment Screw Holes (see Figure 4-5), rotate the sample shutter adjust screw
until a minimum reading on the display is obtained. (A typical reading is 0.2
through 0.5.)
8. Add 0.5 V to the value obtained in Step 7 by adjusting the sample shutter adjust
screw clockwise. (If this reading exceeds 1.2 V, then a cell cleaning is necessary;
see Section 4.12.)
9. Rotate the shutter adjust screw clockwise until the display reads the value obtained
in Step 8.
10. Reassemble the Analyzer Module and, if appropriate, the Platform.
CAUTION: HAND INJURY HAZARD
CAUTION: DELICATE COMPONENTS