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9.
TWA and Exposed Duration
When the watch is exposed to gas, both following values can be read:
- TWA (Time Weighted Average), is the average time of exposure to gas on 8 hours.
- Maximum exposition, this is the maximum level of gas concentration measured.
It is possible to view the TWA and Maximum exposition when the watch is not exposed to gas.
9.1.
TWA Display
From the «TIME » mode, press the pusher EXP to display the TWA. The disc will indicate the TWA.
The minutes hand will move to the 9 o’clock position and the hour hand.
To re-instate the TWA, press both pushers simultaneously during 3 seconds.
From the TWA mode, the watch will return automatically to mode «TIME » after 10 seconds
9.2.
Maximum Exposition Display
From the TWA mode, press the EXP pusher to display the maximum exposition. The disc will indicate MAX
EXP. The minute hand will move to 9 o’clock and the hour hand will the maximum exposition on the gas
concentration scale.
Simultaneously press both pushers during 3 seconds to re-initialize the Maximum exposition.
From the « EXPOSITION » mode, the watch will revert back to mode « TIME » after 10 seconds.
