MSA altair 4 - Page 39

MSA OPERATION
ALTAIR 4 - Operating Manual 39
3.9.2 Span Calibration
To skip the Span procedure, push the
[ ]
button.
If no button is pushed for 30 seconds, the instrument returns to the
Measuring mode.
(1) Once the zero is set, the span screen
displays.
(2) Connect the appropriate calibration gas
to the instrument.
H2S
CO
COMB/EX
O2
COMB/EX
O2
H2S
CO
(3) Attach the calibration cap to the
instrument.
• Insert tab on calibration cap into
slot on instrument.
• Press calibration cap as shown
until it seats onto instrument.
• Press both side tabs down onto
instrument until they snap into.
• Ensure that the calibration cap is
properly seated.
• Connect one end of the tubing to
the calibration cap.
• Connect other end of tubing to the
cylinder regulator (supplied in the
calibration kit).
(4) Open the valve on the regulator.
(5) Press the
[ ]
button to calibrate (span)
the instrument.
• LEDs flash
• SPAN calibration starts.
COMB/EX
O2
After the SPAN calibration completes, the
instrument momentarily displays “SPAN
PASS” or “SPAN ERR” along with the
label of any sensor that failed then
returns to the Measuring mode.
COMB/EX
O2
H2S
CO
COMB/EX
O2
H2S
CO