User Guide

• When the reading has stabilized at

a point near the first calibration

point, CAL will stop blinking and an

intermittent 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 cali-

bration point at 350 mV.

• With mV 602 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 sec-

onds.

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 an-

other one with hot water at 25°C/

77°F or 50°C/122°F.

0 °C

(32 °F)

50 ºC

(122 ºF)