- -
11
the capture of a sample and the next one. When the interval is lower than 60 seconds, the in-
strument will always remain on. With intervals greater than or equal to 60 seconds, it is pos-
sible to turn off the instrument between loggings: it will turn on at the moment of sampling
and will turn off immediately afterwards, thus increasing the battery life. Using the arrows
select
YES
and confirm using
ENTER
in order to enable the automatic turning off, select
NO
and confirm to disable it and keep the instrument on continuously.
Note: even if
Sleep_Mode_LOG=YES
is selected, the instrument does not turn off for less
than one minute intervals.
4)
Identifier of the sample being measured
: it is an automatically increased progressive
number associated with the single PRINT function (
print interval set to 0
) for the printing
of labels. The index appears in the single sample printing together with date, time, conduc-
tivity (liquid resistivity, total dissolved solids or salinity) and temperature measured values.
This menu item allows the value of the first sample to be set: each time the PRINT key is
pressed, the identification ID in the printing is increased by 1 allowing progressive meas-
urement of all measured samples. If the Auto-Hold function, described below in this chapter,
is enabled, the print time interval is forced to zero. Pressing SERIAL only causes the print to
occur when the measurement has stabilized (HOLD symbol still). Later, it is possible to re-
peat the print at will, but while the HOLD mode is on, the sample identifier number is not
increased. This is useful when more labels must be printed with the same identification code
without increasing the code each time.
The message "SMPL ID UNT=RSET SER=PRNT" is scrolled in the comment line: using
the arrows (
and
) the currently measured sample identifier value can be changed.
By holding the °C/°F key down the proposed number is rapidly set to zero.
The instrument's heading information will be printed using the SERIAL key.
5)
AUTO-HOLD function
: the instrument normally operates in
continuous view
mode (de-
fault setting). In this mode the displayed measurement is updated every second. If the Auto-
Hold function is enabled, the instrument performs the measurement and when it stabilizes it
goes in HOLD mode. To update the display indication, press FUNC/ENTER.
In the following figure you can see an example of the measurement process with the Auto-
Hold function enabled. A probe is immersed into a liquid at conductivity
χ
1
and, to perform
the measurement, the FUNC/ENTER key is pressed: The conductivity measurement raises
progressively reaching the final value. The HOLD symbol blinks. In the stretch indicated by
1, the measurement remains stable for 10 seconds, within two digits: at the end of this inter-
val (point 2), the instrument goes into HOLD mode, presenting the final stable value.
2 digit
10s
t
χ
χ
1