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6.4 SPAN CALIBRATION MENU FOR TOXIC GAS ONLY
Note: The MINI-SA software requires that an “AUTO ZERO” be performed as
described in Section 6.3 before the instrument will allow a “SPAN CALIBRA-
TION”. Failure to do so will display the following screen when attempting a
“SPAN CALIBRATION” of the instrument:
AUTO ZERO REQUIRED
BEFORE
SPAN CALIBRATION
ACKNOWLEDGE
Depress both pushbuttons simultaneously to acknowledge this message
and “AUTO ZERO” the instrument per Section 6.3 to procede.
The MINI-SA instrument can be calibrated with span gas supplied by SCOTT
INSTRUMENTS or with a calibration gas supply certified to a concentration
within the following ranges:
CO = 25 to 120 ppm
Cl
2
= 5 ppm only Cl
2
ClO
2
= 5 ppm only Cl
2
HCN = 2.0 to 25.0
H
2
S = 10 to 110 ppm
NH
3
= 10 to 40 ppm
NO
2
= 2.0 to 15.0 ppm
PH
3
= 0.5 to 4.5 ppm
SO
2
= 2.0 to 18.0 ppm
See Section 8.0 for SCOTT INSTRUMENTS supplied calibration gas
cylinders.
To perform “SPAN CALIBRATION” of the sensor, depress the “SELECT”
pushbutton when the “SPAN CALIBRATION” screen is displayed as de-
scribed in Section 6.2. The instrument will display the one of the following
screens:
<gas> SENSOR
For Toxic Gases SPAN CALIBRATION
USING <_> ppm <CALGAS>
CHANGE OK