the standard reference temperature for conductivity measurement. If this value is changed the
conductivity readings obtained will be the value compensated to the new temperature selected.
e.g. if changed to 30
o
C the display will compensate to show conductivity at 30
o
C no matter what
the solution temperature actually is.
5.29
Cell K factor
Display:
PRbE CNSt
Range:
0.01, 0.05, 0.1, 0.5, 1.0, 2.0, 5.0, 10, 50
or
100
Default Value:
0.1
Displays and sets the probe cell constant (K number) See chapter
for measurement ranges for
common K factors. Set this function to match the K factor of the cell being used.
5.30
Hydrogen ion compensation
Display:
H.OFF
or
H.ON
Range:
H.OFF
or
H.ON
Default Value:
H.OFF
Displays and sets the hydrogen ion compensation feature to either be on or off. When measuring
high purity water solutions (1uS/cm or less) compensation needs to be made for hydrogen ions as
well as temperature. When set to
H.ON
the instrument compensates for conductivity due to the
H
+
and OH
−
solvent ions which become prevalent at low conductivity. These ions have an effect on
water conductivity/resistivity since they have different temperature compensation curves to water.
When set to
H.ON
the a dry cell will give a display reading of 0.05uS/cm (if 2 decimal point places
are selected).
5.31
Inductive cell selection
Display:
Ind PRbE
Range:
on
or
OFF
Default Value:
OFF
Used to select whether or not an non contact inductive cell type is used. Set to
on
if a non contact
cell is to be used. Note: non contact cells will only operate with the PM4-CO if the PM4-CO has
been specially ordered for use with that particularly model cell i.e. these types of cell will not work
with standard model PM4-CO displays.
5.32
Display null calibration
Display:
CAL NULL
Range:
n/a
Default Value:
n/a
This function allows the conductivity cell to be referenced to the instruments display value at zero
conductivity. See section
for details.
30 of
PM4COMAN-2.2-1
