Chromatograms; Displaying A Chromatogram; Recording A Chromatogram - ABB PGC2000 Operation And Service Manual

Alarm messages are of two primary types: main alarms and subordinate alarms. Main alarms identify
a major alarm category. These alarms appear on the alarm screen at the left margin (e.g., "Post
Analysis Error:" in Figure 3-6). If a main alarm has subordinate alarms, the main alarm title will
include a colon (:). Subordinate alarms appear below the main alarms, indented and preceded by an
asterisk (*) to show their subordinate status (e.g., "*Valve Manually Switched" in Figure 3-6).
For more information on these alarms refer to "ALARMS" in Section 6, which describes each alarm in
detail.

CHROMATOGRAMS

Chromatograms can be displayed on the screen or recorded on a strip chart recorder while the
analysis is in progress. This can be useful when you suspect an analysis problem.

Displaying a Chromatogram

1. On the Background screen press the F2 (Manual Control) soft key.
2. On the Manual Control Mode screen press the F2 (Detector and Graphics) soft key.
3. On the Chroma Board screen, press the F2 (Graphics) soft key.
4. On the Graphics Mode screen, set % of Screen Offset to 0 and press the F2 (Display The
Graphics) soft key. The chromatogram will scroll up the screen as it happens.
5. If the chromatogram is too large for the screen or too small to read, press the right or left cursor
arrow key to change attenuation. The attenuation value appears at the bottom of the Graphics
screen, after the letter "R", with higher numbers representing more attenuation.
6. To change the speed at which the chromatogram scrolls, press the up (faster) or down (slower)
cursor arrow key. Speed appears at the bottom of the Graphics screen after the letter "S", with
higher numbers representing faster speed.
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. The attenuation ranges
from 0 to 12 (lower numbers provide more sensitivity).
8. After you have selected an attenuation value, press the F2 (Detector and Graphics) soft key and
then repeat steps 3 through 5.
9. Press any soft key to turn off the chromatogram display.

Recording a Chromatogram

1. Connect the recorder to the red and black front panel jacks or to J104 terminals 2 (+) and 1 (-) on
the left side of the GCC. For a 0-100 mv recorder, install a 1000-ohm, 1/4 watt, 1% resistor
across these terminals.
2. On the Background screen press the F2 (Manual Control) soft key.
3. On the Manual Control Mode screen, cursor down to Chroma, then left to Off.
4. Press the ENTER key to turn the recorder off.
5. Cursor to Chroma and press ENTER. The recorder will turn on and record the chromatogram.
2000-OSM, F1 3-7