YOKOGAWA PH71, User Manual

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IM 12B03D01-01E
3-1
3. Measurement
3. Measurement
3.1 Precautions
(1) After storage for an extended period of time, it is recommended that the meter
should be calibrated before taking measurements.
(2) When using a KCl refillable type sensor, check the level of filling solution. (Refer
to Section 6.5.)
(3) Do not use the meter in a solution with the temperature exceeding 80
8
C (100
8
C for
the needle type and test tube size pH sensors). When a KCl replenish-free type
sensor is used and its sensor grip is immersed, the temperature of the solution
should not exceed 50
8
C. Also, do not use the meter in strongly corrosive
solutions, such as a solution containing hydrofluoric acid.
(4) Remove stains from the PH71 meter body using a soft cloth or tissue. If necessary,
use a neutral detergent.
(5) If an abnormal symptom occurs during measurement, locate the cause of the
problem and take corrective actions referring to Chapter 7, “Troubleshooting.”
(6) After measurement, rinse off dirt or the sample solution from the sensor with water
and store it. (Refer to Chapter 6, “Maintenance.”)
(7) Keys should be operated by fingers.
Using the PH71 Meter on a Table
The meter is designed as a portable instrument; however, to use it on a table, attach non-
slip pads (supplied with the instrument) at top and bottom of the meter to stop it from
moving when the sensor is moved.
pH METER
PERSONAL
2004.
PH71
S1.0
E000001
MODEL
No.
STYLE
F0301.EPS
Non-slip pads
Figure 3.1 Position of Non-slip Seats