Steinberg Systems SBS-PH-110 Manual De Instrucciones página 18

a) Remove the probe cover.
b) Before taking each measurement, clean the probe with distilled water. Dip it
in the solution and then dry with a cotton cloth.
c) NOTE: It is forbidden to immerse the probe tip in the test solution above the
immersion level (12). It may lead to damage!
d) Start the unit with the power switch.
e) NOTE: For model SBS-PH-120 / SBS-PH-130 the power switch is located on the
top case of the unit. To start, set the switch to the "ON" position ("OFF"
position - switch off).
f) Dip the probe tip into the solution to be tested.
g) Wait for the measurement to stabilize on the LCD, then read the correct value.
h) After carrying out a series of measurements, turn off the device using the
proper switches.
i) Clean the probe as described in step b of this section.
j) Protect the probe with a cover.
DEVICE CALIBRATION
The calibration process should be performed after the following occur:
a) The first use of the device.
b) Device was inactive for a long time.
c) Measurement under specific conditions (strong solution).
d) Replacing the probe with a new one
MODEL SBS-PH-120
a) Immerse the probe tip in distilled water, remove it and dry with a cotton cloth.
b) Turn on the device with the power switch (2).
c) Immerse the probe tip in a pH 6.86 solution at 25°C.
d) Adjust the measurement reading with the pH7 calibration trimmer (9).
NOTE: The calibration trimmer for pH7 (9) and pH4 (10) is located on the top
of the unit. Use the appropriate tool (included in the kit) and turn the regulator
to set the value corresponding to the solution at a given temperature.
e) Clean the probe according to step (a) of this section.
f) Immerse the probe tip in a pH 4.01 solution at 25°C.
g) Adjust the measurement reading with the pH4 calibration trimmer (10).
NOTE: Perform the calibration in the same way as in point (d) of this
subsection.
h) Clean the probe.
i) Check the correctness of the performed calibration. To do this, immerse the
probe tip in a solution with pH 9.18. Wait until the measurement stabilizes on
the LCD display. If the measurement is within the permissible error tolerance,
the calibration should be considered correct. Otherwise, the calibration steps
must be repeated.