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14 • Chapter 3: Measuring Mode
SC-04
Chapter 3: Measuring Mode
Overview
This chapter explains how to use the SC-04 to perform confined space entry monitoring or
general area monitoring in Measuring Mode.
Start Up
This section explains how to start up the SC-04, get it ready for operation, and turn it off.
Turning On the SC-04
To illustrate certain functions, the following description of the SC-04 start up sequence
assumes that the following items in User Mode are turned on:
LUNCH
,
CAL.RMDR
, and
BP.RMDR
in User Mode, and
ID DISP
and
A.ZERO
in Maintenance Mode. If any of these
items are turned off, then the corresponding screens do not appear.
1. Press and briefly hold down POWER MODE. Release the button when you hear a beep.
2. If
LUNCH
is set to
ON
(factory setting if
OFF
, see pg.56), the Lunch Break Screen
appears. The unit counts down from 5 seconds.
a. Continue
Accumulating: To continue accumulating peak and time-weighted average
(TWA) readings from the last time the SC-04 was used, press and release POWER
MODE or allow the countdown to reach 0. The short-term exposure limit (STEL)
reading is reset each time the SC-04 is turned on.
b. Reset
Accumulation: To reset the accumulation of peak and time-weighted average
(TWA) readings, press and release AIR before the countdown reaches 0.
3. If
CAL.RMDR
is set to
ON
(factory setting) and a calibration is due, the screen that
appears next depends on how
CAL.EXPD
is set in User Mode (see pg.50). The three
possible screens are described below. If a calibration is not due, the instrument displays
the number of days left until a calibration is due.
5
SEC
RESUME
5
SEC
YES .MODE
5
SEC
NO .AIR