Safe Led; Calibration Check; Calibration - MSA ALTAIR 5 Operating Manual

OPERATION
3.7.

Safe LED

The instrument is equipped with a green "SAFE LED". This green
SAFE LED flashes every 15 seconds under the following conditions:
the green SAFE LED is enabled
•
instrument is on the normal Measure Gases page
•
combustible reading is 0% LEL or 0%CH
•
Oxygen (O
•
Toxic sensor reading (CO, H
•
no gas alarms are present (low or high)
•
instrument is not in Low Battery warning or alarm
•
Toxic sensor reading (CO, H
•
are 0 ppm.
3.8.

Calibration Check

The calibration check is simple and should only take about one minute.
Perform this calibration check before each day's use for each installed
sensor.
(1) Turn ON the ALTAIR 5 Multigas Detector in clean, fresh air.
(2) Verify that readings indicate no gas is present.
(3) Attach regulator (supplied with calibration kit) to the cylinder.
(4) Connect tubing (supplied with calibration kit) to the regulator.
(5) Attach other end of tubing to the instrument.
(6) Open the valve on the regulator, if so supplied.
The reading of the ALTAIR 5 Multigas Detector display should be
•
within the limits stated on the calibration cylinder or limits deter-
mined by your company.
If necessary, change cylinder to introduce other calibration.
•
If readings are not within these limits, the ALTAIR 5 Multigas
•
Detector requires recalibration (see Section 3.9).
3.9.

Calibration

CSA requires (per 22.2 NO. 152) that the instrument's sensitivity be tested
before each day's use on a known concentration of methane equivalent to
25-50% of full scale concentration. Accuracy must be within 0 to +20% of
actual. Correct accuracy by performing the calibration procedure within this
manual.
The ALTAIR 5 can be calibrated either manually using this procedure or
automatically using the GALAXY
Calibration must be performed using a flow regulator with a flow rate set to
0.25 liters per minute.
After charging, wait 30 minutes before calibration to allow the instrument to
return to normal temperature.
38
) reading is 20.8%
2
TM
test stand. Refer to 7.7 of the appendix.
ALTAIR 5 - Operating Manual
4
S, SO etc.) reading is 0 ppm
2 2
S, SO etc.) STEL and TWA readings
2 2
MSA
US