Delta HD2105.1, Руководство по эксплуатации

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HD2105
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V2.3
Note: even if Sleep_Mode_LOG=YES is selected, the instrument does not turn off for less
than one minute intervals.
6) LAST CAL m/d h/m (Last pH calibration) : the display shows the month and day (m/d) in
the main line, and the hour and minutes (h/m) in the secondary line of the last pH electrode
calibration. This menu item cannot be modified. The calibration year is not displayed.
7) pH RES : selects the number of leading digits for the pH measurement: using the arrows se-
lect 1.23 to obtain the pH hundredths or 1.234 to obtain the thousandths. The chosen resolu-
tion is applied to the new logged measurements, while the previous choice still applies for
the already memorized ones.
8) BUFR_1 (First buffer) : selects the value of the first buffer for the pH electrode calibration.
The preset buffers are compensated for temperature. The ATC indication is displayed in the
lower line. The USER buffer, defined by the user, is not compensated for temperature: to
change its value, go to the "SET USER BUFR" step.
Please see the paragraph dedicated to calibration on page 17.
9) BUFR_2 (Second buffer) : selects the value of the second buffer for the pH electrode cali-
bration. No buffer solution values too close (less than 2pH) to the first buffer are proposed.
This is also true for the USER buffer, defined by the user at the "SET USER BUFR" step: if,
for example BUFR_1=6.860 and USER=5.000, the BUFR_2 USER does not appear among
the values because it is too close to BUFR_1. The selection NIL (=no buffer) disables the
current buffer. The USER buffer, defined by the user, is not compensated for temperature.
Please see the paragraph dedicated to calibration on page 17.
10) BUFR_3 (Third buffer) : selects the value of the third buffer for the pH electrode calibra-
tion. No buffer solution values too close (less than 2pH) to the first two buffers are pro-
posed. This is also true for the USER buffer, defined by the user at the "SET USER BUFR"
step: The selection NIL (=no buffer) disables the current buffer. The USER buffer is not
compensated for temperature.
Please see the paragraph dedicated to calibration on page 17.
11) SET USER BUFR (Set user buffer) : this is a buffer whose value can be defined by the
user using the arrows; all values from 0 to 14pH are available. This buffer is not compen-
sated for temperature, so the buffer value must be set at the actual solution temperature. As
an alternative, the correct value according to temperature can be set in the calibration phase.
12) RCD MODE (Record mode) : the instrument captures a pH/mV and a temperature value
every second. If the RCD MODE parameter is set to " pH " (factory default), the maximum
and minimum values displayed using FUNC/ENTER refer to pH: the indicated temperature
is that measured at the maximum and minimum pH and is not the maximum and minimum
temperature.
If the RCD MODE parameter is set to "
tp " (=temperature), the maximum and minimum
values displayed using FUNC/ENTER refer to temperature: the indicated pH is that meas-
ured at the maximum and minimum temperature and is not the maximum and minimum pH.
Finally, if the RCD MODE parameter is set to "
Indep " (=independent), the maximum and
minimum values displayed using FUNC/ENTER are independent: the indicated pH and
temperature are the maximum and minimum measured values but are not necessarily re-
ferred to the same measurement moment.
13) Probe type : the message “PRBE_TYPE" is scrolled in the comment line. The main line in
the center of the display shows the type of probe connected to the instrument. The following
probes can be connected to the input: