Shut Down Procedures - ABB PGC2000 Operation And Service Manual

6. If the chromatogram is too large for the recorder or too small to read, press the F1 soft key as
necessary to return to the Manual Control Mode screen.
7. On the Manual Control Mode screen, cursor down to the attenuation line (Attn:) and change the
attenuation value as necessary to obtain the desired chromatogram size. Figure 3-7 correlates
attenuation values with recorder ranges. These ranges exclude any operator-entered ZERO
OFFSET. (If you have entered a 5% ZERO OFFSET, the recorder range for Attenuation 1 would
become -0.244 to +4.636 mv.)
8. When you finish plotting chromatograms, go to the Manual Control Mode screen.
9. Cursor to Chroma, then to Off, and then press ENTER. The recorder will stop.

SHUT DOWN PROCEDURES

If it is necessary to turn off power to the analyzer for maintenance, perform the following steps:
1. On the Background screen press the F1 (Exit to Commands) soft key.
2. On the Commands screen cursor to ANALYSIS CONTROL, if necessary, and press the F4
(Start/Stop Analysis) soft key.
3. On the Start/Stop Analysis screen, cursor to At End of Analysis? and press the F2 (Stop
Analyzer) soft key. The analyzer will stop at the end of the analysis.
4. If a temporary turn-off is necessary, place the external circuit breaker to OFF.
5. If an extended turn-off is necessary:
a. Turn off sample and burner fuel.
b. Allow analyzer to cool to ambient temperature.
c. Turn off remaining flows at their sources and plug all vents.
6. To return the analyzer to operational status, perform the normal turn-on and calibration
procedures.
3-8
Attenuation
1
2
3
4
5
6
7
8
9
10
11
12
Figure 3-7. CHROMATOGRAM ATTENUATION RANGES
Recorder Range
0 - 4.88 mv
0 - 9.75 mv
0 - 19.52 mv
0 - 39.02 mv
0 - 78.08 mv
0 - 156.16 mv
0 - 312.32 mv
0 - 624.64 mv
0 - 1.250 V
0 - 2.500 V
0 - 5.00 V
0 - 10.00 V
2000-OSM, F1