Hanna-instruments mV 602 Series Instrukcja Użytkownika Pobierz pdf (Strona 23)

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• Use a Checktemp or a calibrated thermometer with a reso-

lution of 0.1° as a reference thermometer.

• Immerse the temperature probe in

the beaker with ice and water as near

to the Checktemp as possible.

• Press and hold first CFM and then

CAL to enter the temperature cali-

bration mode.

• Execute the password procedure.

• With pH 502, the meter will ask for the calibration proce-

dure code number. Use  or  to select code 1 for the

temperature calibration and press CFM to enter.

• CAL will blink on the LCD until the

meter confirms a steady reading.

• When the reading has stabilized at

a point near the first calibration

point, CAL will stop blinking and an

intermittent CFM will prompt the user

to confirm the first calibration.

• If the reading stabilizes at a reading

significantly variant from the first

setpoint, an intermittent WRONG

will prompt the user to check the

beaker or baths.

• After pressing CFM the unit will switch to the second cali-

bration point.

• Select 25 or 50°C by pressing  or  .

0 °C

(32 °F)

°C

• 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)

°C

50 ºC

(122 ºF)

°C

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