Twa Calculation Examples; Time Display; Date Display; Last Cal Page - MSA ALTAIR 4X Manuel D'utilisation

TWA Calculation Examples:

• 1-hour exposure of 50 ppm:
(1 hour x 50 PPM) + (7 hours x 0 PPM)
• 4-hour exposure of 50 ppm and
4-hour exposure of 100 ppm:
(4 hours x 50 PPM) + (4 hours x 100 PPM)
• 12-hour exposure of 100 ppm:
(12 hours x 100 PPM)
8 hours

2.3.6 Time Display

Current time appears on the display in a 12-hour format by default.
A 24-hour format can be selected using MSA Link.

2.3.7 Date Display

Current date appears on the display in the format: MM-DD-YYYY.

2.3.8 Last Cal Page

Displays the instrument's last successful calibration date in the format:
MM-DD-YYYY.

2.3.9 Cal Due Page

Displays the days until the instrument's next calibration is due
(user selectable).

2.3.10 Motion Alert Page

To activate or deactivate the Motion Alert feature, press the
while the Motion Alert Activation page is displayed. When the Motion
Alert feature is active, the r symbol flashes every 3 seconds. The
instrument enters pre-alarm when no motion is detected for 20 seconds.
This condition can be cleared by moving the instrument.
2-10
8 hours
8 hours
= 150 PPM
= 6.25 PPM
= 75 PPM
button
▲