Metrohm 790 Personal IC - Manual (Page 92)

4.3 Systems
790 Personal IC
83
Hardware
This tab of the hardware settings window defines general parameters
which are set automatically at power on of the instrument.
Flow correction Factor for correction of the difference between
displayed and actual flow rate of the high-
pressure pump.
Range: 0.9 ... 1.09
The flow correction is determined by measure-
ment of the actual flow rate with the aid of a
measuring cylinder as follows:
Flow correction =
Displayed flow rate
Measured flow rate
Cell constant Cell constant of the conductivity cell for correct
display of the absolute conductivity. Enter the
cell constant printed on the detector block into
this field.
Range: 0.1 ... 1000 /cm
For a precise determination of the cell constant,
pump a calibration solution of known
conductivity through the IC system, observe the
displayed conductivity and change the cell con-
stant until the correct conductivity value is
displayed.
Possibility for changing the break times for in-
jection valve Valve and suppressor module Sup-
pressor .
These values should only be changed after
consulting the Metrohm Service.
Alarm stops
The
Alarm stops tab of the hardware settings window defines the events
for which the 790 Personal IC is stopped immediately. At an alarm stop,
high-pressure pump and peristaltic pump are stopped immediately; the
running determination and the active sample queue are also stopped.