MSA ALTAIR 5X Manual De Uso página 33

4.10 Calibration
The ALTAIR 5X can be calibrated either manually using this procedure or automatically using the GALAXY or GALAXY
GX2 test stand. Refer to
The use of the demand regulators listed in
battery pack has been depleted or a new battery pack has been installed allow sensors to stabilize for 30 minutes before
calibration is performed.
WARNING!
• Special conditions with toxic gases! If the device is to be checked or calibrated for reactive gases, prerequisites are
required; otherwise, incorrect calibration would result in incorrect device operation.
• Reactive toxic gases (e.g., chlorine, ammonia, chlorine dioxide) have the property of diffusing into the rubber and
plastic tubes so that the volume of test gas available in the device would no longer be sufficient to correctly perform
device calibration.
• When calibrating the device with toxic gases, certain prerequisites are required, otherwise incorrect calibration could
result:
○ A special pressure regulator
○ Shortest possible connection tubes between the pressure regulator and the device
○ Connection tubes made from a material that does not absorb the test gases (e.g., PTFE).
Failure to follow these warnings can result in serious personal injury or death.
NOTE: If using normal tubes and pressure regulators, expose them to the required test gas for an extended time period.
Keep these materials dedicated for use with that test gas only; do not use them for other gases.
For example, for chlorine, allow the entire contents of a test gas cylinder to flow through the pressure regulator and tubes
before using to calibrate the device. Mark these materials for use with chlorine only.
4.10.1 Zero Calibration Procedure
1. Press the ▲ button for five seconds in Normal Measurement
page.
ZERO screen displays.
To skip the ZERO procedure and move directly to the span calibration
procedure, push the ▲ button. If no button is pushed for 30 seconds,
the device prompts user to perform a SPAN calibration before device
returns to the Normal Measurement page.
To perform ONLY a Fresh Air Setup at this time, press the ■ button.
The device then performs a Fresh Air Setup as described in
Turning ON and Fresh Air
complete, the device returns to the normal Measure screen.
2. Press the ▼ button to confirm the ZERO screen, i. e. to execute
zero calibration.
○ The message "SENSOR REFRESH" displays, followed
by the message "ZERO CALIBRATION".
○ The "REFRESH" message does not appear if a catalytic
combustible sensor is not installed.
○ ZERO calibration starts.
○ A progress bar shows the user how much of the
calibration has been completed.
NOTE: During the first moments of a ZERO calibration, the
US
9.5 Calibration Options.
8 Ordering Information
Setup. When the Fresh Air Setup is
ALTAIR 5X / ALTAIR 5X IR
is recommended. If a new sensor has been installed, the
4.2
4 Operation
33