ToxiRAE Pro User’s Guide
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12.2. Navigation In Normal Mode
Step through the screens in Normal Mode by pressing [MODE]. Some screens allow
actions on your part, such as clearing the data. In these instances, pressing [Y/+] performs
the action.
12.2.1. TWA, STEL, Peak
The first screen includes a readout for TWA, STEL, and Peak readings.
TWA*
The TWA (time-weighted average) reading is the average reading of the gas
concentration times that the monitor has been on, prorated to an 8-hour period.
STEL*
Short Term Exposure Limit (STEL) data based on 15-minute STEL values,
expressed in ppm or mg/m
3
. A STEL value is only displayed after the
ToxiRAE Pro has been on for 15 minutes or longer. After exiting PC
Communications mode, the STEL value is reset.
Peak
The Peak value tells you the highest reading for the sensor since the ToxiRAE
Pro was turned on. Press [Y/+] twice to clear the Peak value.
Note:
If you do not press a key within 1 minute, the display reverts to the
normal reading.
*
If your ToxiRAE Pro is configured with an oxygen (O
2
) sensor, TWA and STEL are
not included in the menus because neither TWA nor STEL are calculated for this sensor.
Press [MODE] to advance from screen to screen.
12.2.2. Date, Time, And Temperature
The current Date is expressed as Month/Day/Year, with two digits for month and day,
and four digits for the year. Below the date is the time, which is expressed as
Hours/Minutes/Seconds, with two digits for each. The time is in 24-hour (military)
format. Below the time is the internal temperature, which can be in degrees Fahrenheit or
Celsius (settable in Programming Mode).
12.2.3. Wireless Settings
The current wireless settings are shown here. These include the PAN ID, Channel, and
Unit ID, which are helpful when creating or troubleshooting networks. Parent ID data
does not apply.
