Metrohm 732 IC Detector - Manual (Page 67)

3 Operating tuturial
732 IC Detector / 733 IC Separation Center
60
OVERLOAD
As the selected full-scale range is clearly less than the
measured absolute conductivity, red overload display 88 on
the 732 IC Detector now lights up.
3 Trigger auto-zero
ZERO
⇒ Press the key. This starts the automatic elec-
tronic background compensation. During zeroing, the
green LED in the key starts to flash.
+0.000 µµS/cm 56.4 min
full scale: 4.00 µµS/cm
As soon as zeroing is at an end, the green LED in the
key is permanently on. The top line of the display
shows the auto-zero value in place of the absolute con-
ductivity. In contrast to the absolute conductivity, the auto-
zero value is always outputted with the sign in front of the
number.
With the auto-zero function the current conductivity value
becomes the new zero point of the selected full-scale
range. Each time the key is pressed, the meas-
uring signal is always reset to zero. The auto-zero function
can be switched off with the key.
4 Set injection valve A to "FILL"
FILL
⇒ Press the key for injection valve A at the 733 IC
Separation Center. This switches the injection valve to the
"FILL" position. This position is indicated by lighting up of
the green LED in the key.
5 Fill sample loop
⇒ Immerse the aspirating tubing 88 88 attached to connection
22 22 in the standard solution.
⇒ Using the syringe fixed to connection 21 21 siphon in ca. 1 mL
standard solution.
6 Set injection valve A to "INJECT"
INJECT
⇒ Press the key for injection valve A on the 733 IC
Separation Center and the chromatogram is started. This
switches the injection valve to the "INJECT" position. The
"INJECT" position is indicated by lighting up of the green
LED in the key.
⇒ At the same time start the recorder (if used).
An integrator attached to the 733 IC Separation Center or a
PC with evaluation software (e.g. «IC Metrodata for Win95»)
is started automatically when injection valve A is switched
to the "INJECT" position.