MAN0597 ISSUE 08 - 02/04
2302M5030
4. OPERATION
32
STEL Screen ( )
This symbol is displayed when the
instrument is displaying the STEL
readings for the toxic sensors. The
STEL is a time weighted average,
measured over a 15 minute reference
period. It is used to monitor exposure
to toxic gases in line with current
regulations and/or legislation. Until 15
minutes has elapsed these are
projected values.
LTEL Screen ( )
This symbol is displayed when the
instrument is displaying the LTEL
(TWA) readings for the toxic sensors.
The LTEL is a time weighted average,
measured over an 8 hour reference
period. It is used to monitor exposure
to toxic gases in line with current
regulations and/or legislation. Until the
Impact has been monitoring
continuously for 8 hours these are
projected values.
Status Screen
This screen shows the current time,
date and battery status.
It is possible to change the instrument
clock setting as follows: Press the
"
key while this screen is displayed and
the clock setting function will be activated, with the hour field
highlighted. Use the
! and # keys to change the value as
required and press the
" key to move to the minute field.
Again use the
! and # keys to change the value and continue
until all of the fields have been correctly set. Finally press the
" key to store the changes. Note that the key can be
pressed at any time to abort the procedure.
0 0.0
CO ppm
H2S
ppm
0
0.0
CO ppm
H2S
ppm
18:33:00
22/Jan/2001
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