12
either the pH standard solution or water and let it stand for one hour. For more accurate
measurement, immerse it 12 hours at least in the pH 4 standard solution before use. * (Do not turn
on the unit during this immersion time.)
- The sensor probe electrode of this unit may be damaged or its useful life may be shortened if it is
used for liquids such as organic solvents, oils, adhesives, strong acids (pH 0 to pH 2), strong alkalis
(pH 12 to pH 14) and surface-active agents.
- The pH reading may become unstable when pure water is measured.
- If the pH standard solution contacts the skin (hand), immediately wash the contaminated skin with
running water. If the solution gets into the eyes, immediately rinse with water and consult a doctor.
- Keep the pH standard solution out of reach of children. If accidentally ingested, consult a doctor
immediately.
- When using the AC adapter (optional), do not connect or disconnect the power cord with wet hands.
Otherwise, electrical shock or short-circuit may occur.
Overview
The SK-640PH pH meter is easy-to-operate instrument for measuring hydrogen ion concentration
(pH) and liquid temperature.
The meter can be calibrated at three points (pH4, pH7 and pH10) and provides reliable measurements
by using the built-in automatic temperature compensation.
Features
Large LCD for easy reading
The pH value and the temperature are indicated on a large LCD.
Auto Power-Off
The "auto power-off" function turns off the power automatically if the unit is not operated for 20
minutes. This conserves battery life if you forget to turn off the unit.
Auto temperature compensation
Once the PHP-31 sensor probe is connected to your SK-620PH, it will perform automatic
temperature compensation to produce more accurate pH measurements.
Cautions before use
-
Check that the product has not been damaged during transport. If damage is found, contact the
store where you purchased the instrument or our service network.
Do not dispose of the carrying case until you have confirmed that the instrument works properly.
The carrying case will be needed when returning the instrument for repair or replacement.
-
When the pH of food or drink is to be measured, take a sample (sufficient quantity so that the
sensor tip can be immersed at least 3 cm in the sample) in a separate container for measurement.
Do not ingest the sample after measurement.
-
The sensor section is made of glass, so take a great care in handling.
If it is damaged, be careful not to get injured by broken glass.
-
The sensor probe is a consumable. It must be replaced with a new one if the electrode is broken,
the performance is degraded or the liquid inside is low. (It is not possible to repair the sensor probe.)
Components names and functions