Jenway 3540 - Manual (Page 35)

Should you require to change the temperature co-efficient press the down arrow key
to highlight Temperature Co-efficient (%) in the Conductivity Calibration set Up
screen, then press the Enter key to move the highlight to the current selection. A data
entry box will appear in the centre of the screen.
Data entry box for setting the Temperature Co-efficient
The box around the least significant digit will be flashing to indicate that this digit can
be changed by pressing the up or down arrow keys. When this is set to the desired
value the right or left arrow keys can be used to move the flashing highlight to the
other digits, which in turn can be adjusted to the desired levels with the up or down
arrow keys. When all digits are set to the desired levels press the Enter key to
confirm the setting and return the highlight to the left-hand side of the menu. Use the
Escape [ESC] key to return to other menu levels or continue with the conductivity
calibration set up as follows.
4.14
Reference Temperature Setting
The conductivity value displayed is the value as it would be at a reference
temperature based on the temperature co-efficient as described above. The most
common reference temperature is 25 degrees Celsius, but other standards have
quoted both 20 and 18 degrees Celsius.
To select an alternative reference temperature from those above, press the down
arrow to highlight Reference Temperature on the Conductivity Calibration Set Up
screen, then press the Enter key. The highlight will move across to the default setting
of ‘25
o C’ or one of the above options if this has previously been changed. Use the up
or down arrow keys to view the options and press the Enter key to accept your
preferred setting when this is highlighted on the display. Use the Escape key to return
to other menu levels or continue setting up the Conductivity calibration as follows.
4.15
Ultra-Pure Water Temperature Correction
The measurement of ultra-pure water is a major conductivity application, for this
purpose the 3540 has a non-linear temperature compensation algorithm that can be
used to report results conforming to BS/EN 2788, DIN 3840 sec 2.35 and BS6068.
This option must only be enabled for the above application and must be disabled for
all other applications.
To enable the ultra-pure water temperature compensation, press the down arrow to
highlight Ultra-Pure Temp Correction on the Conductivity Calibration Set Up screen,
then press the Enter key. The highlight will move across to the default setting of
‘Disabled’. Use the up or down arrow keys to select ‘Enabled’ and press the Enter key
to accept this setting when it is highlighted on the display. Use the Escape key to
return to other menu levels or continue setting up the Conductivity calibration as
follows.