Fisherbrand accumet AB315, Руководство пользователя

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24 Chapter 4 | Calibration
4.2 Millivolt (mV) Offset
Adjustment
Oxidization Reduction Potential (ORP or Redox) is useful as
a relative indicator of the oxidizing or reducing nature of a
sample solution. The mV offset adjustment using the
relative mV (RmV) mode allows readings to be comparable
to a reference.
Ensure the active measure mode is RmV.
Press the “Cal” key to start the calibration.
Rinse the ORP electrode and ATC probe and
place into the ORP standard.
Wait for the RmV value to stabilize. While the
reading is stabilizing, the stopwatch icon is shown
and the reading flashes. When the reading is
stable, the checkmark icon is shown, and the
reading is solid.
Once the reading is stable, press the

or

key
to edit the value.
Once the desired RmV value is shown, press the
“Enter” key to save and end the calibration.
The meter will display the calculated offset value
and then proceed to the main measure mode.
Note: The meter allows an offset of up to ±250 mV from
the measured raw mV value.
Note: Press the “Read” key at any time to abort the
calibration and return to the main measure mode.
4.3 Temperature
Calibration
The thermistor sensor used for automatic temperature
compensation and measurement is both accurate and
stable, so frequent calibration is not required.
When an ATC probe is connected to the meter, use the
Temperature Calibration item within the Setup Menu to
perform a one-point offset calibration, up to
±
5.0 °C.
Use the Temperature Units item in the meter Setup Menu
to select the displayed temperature units as degrees
Celsius or Fahrenheit.
Place the ATC probe into a solution with a stable
temperature and NIST traceable thermometer.
Press the “Menu” key to enter the Setup Menu.
Press the  or  key to scroll through the Setup
Menu list until the Temp. Calibration item is shown.
The temperature value will blink, indicating the
reading from the ATC probe is being measured.
Once the reading is stable, the value will stop
blinking and the checkmark icon will be shown.
Press the

or

key to adjust the temperature
value. The temperature offset value will be shown
in the 2
nd field.
c. Press the

key to increase the value by 0.1°.
Press and hold the

key to quickly increase.
d. Press the

key to decrease the value by 0.1°.
Press and hold the  key to quickly decrease.
Press the “Enter” key to save the change.
Note: Press the “Read” key at any time to abort the
calibration and return to the main measure mode.