Specifications

6
Instruction 0019-9208
N
2
O Monitor 3010
If the monitor is switched OFF and then back ON before 8 hours has
elapsed, then the operator has the option of continuing the current
TWA reading by pressing the f2 button as de scribed in Section 2.3
Start-Up Display. This is intended for instances such as lunch breaks
where the unit is switched OFF for a short time, but the total TWA is
required. Note that during the time the monitor is OFF, the gas read-
ing will be assumed to be zero and will be added into the TWA if the
previous TWA is con tin ued when the monitor is switched back ON.
• twa (in lower case) is continuously calculated over the operating time
of the instrument. This mode is useful for monitoring an area
for a few minutes or more and is the preferred mode of opera-
tion for checking operating room atmospheres. A new twa can be
started after monitor has been turned ON by pressing the f1 button as
described below.
If the monitor is switched OFF and then back ON, then the op er a tor
has the option of continuing the current twa reading by pressing the f2
button as de scribed in Section 2.3 Start-Up Display. Note that during
the time the monitor is OFF, the gas reading will be assumed to be zero
and will be added into the twa if the previous twa is con tin ued when
the monitor is switched back ON.
Starting a New TWA/twa – To start a new TWA/twa reading after the
monitor has been turned ON, press and hold down the f1 button for 3 sec-
onds or more until the fol low ing display appears:
Confi rm that a new TWA/twa is reading is desired by pressing and hold-
ing down the f2 button for 3 seconds or more. The mes sage “New TWA
Started” will appear while the f2 button is held down. Otherwise, press
the f1 button to cancel this operation and return to the ex ist ing TWA/twa
calculation.