27
SECTION 3, continued
3.1.4 Selecting Measurement Resolution
The meter can display measurement values to tenths (0.0),
hundredths (0.00) or thousandths (0.000). The default
is hundredths.
1. From the reading mode, press
SETUP.
2. The
Setup icon and the number 1 (flashing) will be displayed.
Press the up arrow three times so the Setup number is
4.
3. Change the resolution by pressing
ENTER; this toggles
between the three resolution options.
4. When the desired option is selected, press
EXIT to return to
the reading mode.
3.1.5 Selecting Auto Buffer Recognition
The sension1 Portable pH Meter is designed to auto-recognize
and calibrate on 4.01, 6.86 or 7.00, and 10.01 pH buffers. Buffers
with pH values other than these cannot be used to calibrate the
sens
ion1 meter.
The only selection option for pH buffer auto recognition is 6.86
or 7.00. The default is pH 7.00. To change this option:
1. From the reading mode, press
SETUP.
2. The
Setup icon and the number 1 (flashing) will be displayed.
Press the up arrow until the Setup number is
5.
3. Change the buffer value by pressing
ENTER; this toggles the
between the choices 6.86 and 7.00.
4. When the desired option is selected, press
EXIT to return to
the reading mode.
3.2 Calibrating the Meter
Hach recommends a daily two- or three-point calibration using
buffers that bracket the sample pH. This will verify the electrode
is working properly and allow the slope value to be stored.
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