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42 • Chapter 5: User Mode and Calibration
SC-04
7. If the fresh air adjustment passes, the instrument returns to the
AIR
item in the
GAS CAL
menu.
8. If the fresh air adjustment fails, “FAIL AIR” displays. Press and release POWER MODE
to acknowledge the failure. See pg.63.
Performing a Span Adjustment in A-CAL
The
A-CAL
item only appears if
E-CAL
in User Mode is set to
OFF
(factory setting). If
E-
CAL
is set to
ON
, see pg.45 for calibration instructions.
Preparing for Span Adjustment
To adjust the span on the SC-04, you need:
•
Calibration gas cylinder
•
0.25 LPM fixed flow regulator
•
Non-absorbent tubing
•
Calibration cup
1. Confirm that the SC-04’s calibration gas value matches the concentration listed on the
calibration gas cylinder as described on pg.47.
2. Install the calibration cup onto the SC-04. Be sure the calibration cup is installed in the
correct direction and that it is pushed on all the way.
3. Use the tubing to connect the regulator to the inlet of the calibration cup (labeled “IN”).
Table 10: Calibration Concentration Limits
Channel
Min. Cal.
Concentration
Max. Cal.
Concentration
Ammonia
8 ppm
400 ppm
Chlorine
0.15 ppm
10.00 ppm
Hydrogen Cyanide
0.9 ppm
30.0 ppm
Nitrogen Dioxide
0.50 ppm
20.00 ppm
Phosphine
0.05 ppm
20.00 ppm
Sulfur Dioxide
0.50 ppm
100.00 ppm
POW ER
MODE
AIR
Front View
Side View