MeshGuard User’s Guide
The initial screen is the reading display:
Press [MODE], and it displays STEL.
The STEL (short-term exposure
limit) is the average reading of the gas concentration for the last 15
minutes.
Note:
The STEL reading does not appear until 15 minutes have elapsed.
If the MeshGuard has not been on for 15 minutes, it displays three dashes:
Press [MODE], and it displays TWA.
The TWA (time-weighted average)
is the accumulated reading of the gas concentration, divided by 8 hours,
since the monitor was turned on.
Press [MODE], and the display indicates the Peak reading by alternating
between “P” (for “Peak”) and a numerical value:
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