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• When the reading has stabilized at a
point near the first calibration point,
CAL will stop blinking and an inter-
mittent CFM icon will prompt the user
to confirm the first calibration.
• If the display stabilizes at a value
significantly different from the first
setpoint, an intermittent WRONG
icon will prompt the user to check and
adjust the simulator and start again.
• After pressing CFM the unit will switch to the second cal-
ibration point at 350 mV.
• With
mV600
it is possible to select 1900 mV by pressing
or
. After that, proceed as described above.
Note
A measure is considered stable when it varies little within
a sequence of acquisitions. The number of acquisitions is
fixed so that the waiting time for blinking “CFM” is about
20 seconds.
Calibration procedure may be interrupted by
pressing CAL. If the calibration procedure is in-
terrupted this way, or if the controller is switched
off before the last step, no calibration data is
stored to EEPROM.
TEMPERATURE CALIBRATION
The pH/mV controller is factory calibrated for the mV and
temperature inputs. However, the user may also perform a
temperature calibration.
• Prepare a beaker containing ice and
water at 0 °C/32 °F and another
one with hot water at 25 °C/77 °F
or 50 °C/122 °F.
0 °C
(32 °F)
°C
50 ºC
(122 ºF)
°C
