52
5 Maintenance
5.3
Adjustment
Both the zero point and the indication accuracy must be adjusted
for each of the three sensors.
WARNING!
The device be adjusted by specialist technicians
only. Incorrect adjustment can result in incorrect
analysis of the measurement results.
The Adjustment menu is shown in Section 3.3.4.1. The overview
below shows the menu items and corresponding sensors. These
these items in menu level 2 can be accessed via the advanced
settings of the
Info
menu, under
Adjustment
.
Menu item
Sensor
Measuring
range
Adjusts:
0 PPM
Semiconductor ppm
Zero point
10000 PPM
Semiconductor ppm
Indication
accuracy
0%LEL
Catalytic
combustion
LEL
Zero point
Thermal
conductivity
% vol.
50%LEL
Catalytic
combustion
LEL
Indication
accuracy
100 VOL%
Thermal
conductivity
% vol.
Indication
accuracy
Note:
Each time you select
Reset
from the Hardware
menu, you must subsequently carry out an adjust-
ment.
