Instruction manual - Mettler-Toledo

Calibration to saturation (SAT)
Display Action Remark
Display Action Remark
Activate calibration
(Press cal.)
Enter mode code 1100
Select with key, edit number
with key, proceed with
enter
Place sensor in calibration medium
Start with enter
SAT or Conc calibration
is selected during
configuration.
If an invalid code
is entered, the
Transmitter returns to
measuring mode.
The Transmitter is in
the Hold mode
Enter desired value for saturation
Select with key, edit number
with key, proceed with enter
Display new slope and zero
(related to 25°C and
1013 mbars).
End calibration with enter.
Default: last value
entered
New calibration:
Press cal key.
Enter relative humidity
Select with key, edit number
with key, proceed with
enter
Enter calibration pressure
Select with key, edit number
with key, proceed with
enter
Automatic drift check
Display of sensor current
(related to 25°C and
1013 mbars normal pressure)
and measuring temperature.
The drift check might take
some time.
Default for relative
humidity in aqueous
media:
rH = 100 %
(in air approx. 50 %
Default for calibration
pressure is the
process pressure
configured
Drift check can be
stopped after
> 10 sec
by pressing cal
(accuracy reduced).
Place sensor in process
The percent saturation is shown
in the main display alternately
with “Hold”; enter flashes.
End with enter.
After end of calibration,
the outputs
remain in Hold
mode for approx.
20 sec.
Information on saturation calibration (SAT)
• The calibration medium must be in equilibrium with air (percent saturation
for water is 100 %).
Oxygen exchange between water and air is very slow. To speed up the
adjustment processes, make sure that there is a steady medium flow during
calibration.
• If the percent saturation is known from a simultaneous measurement,
it can be entered manually.
• For 2-point calibration, perform zero point calibration first.
62
O 2 4100 e
63