Change

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 Cl2 = 5 ppm only Cl2 ClO2 = 5 ppm only Cl2 HCN = 2.0 to 25.0 H2S = 10 to 110 ppm NH3 = 10 to 40 ppm NO2 = 2.0 to 15.0 ppm PH3 = 0.5 to 4.5 ppm SO2 = 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

PORTABLE GAS DETECTION INSTRUMENT specifications

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