SATO KEIRYOKI 640S-1 Instruction Manual

Introduction
Thank you for purchasing the standard probe Model 640S-1.
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This probe is designed to measure hydrogen ion concentration (pH) and temperature (liquid temperature)
connecting with the pH meter Model SK-640PH or SK-650PH. Do not use this product for any other
purposes.
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Read this instruction manual thoroughly before using and keep it in a safe place for your future references.
Names of Section
11
① Electrode membrane
②Glass internal electrode
③ Liquid junction
④ Temperature sensor
Precautions before use
When the unit is first used or after it has been stored for several days, the pH measurement response may
be slower. Allow the unit to adjust to the ambient environment before use as follows.
(1) Remove the electrode cap from the unit.
Note: The electrode cap is filled with pure water to prevent the glass electrode membrane from drying.
The pure water may spill when removing the cap.
(2) Immerse the glass electrode in the pH standard solution (pH7) or water for two hours or more before use.
Using the 640S-1
(1) Remove the electrode cap from the unit.
- Hold the unit upright to avoid spilling the inner solution.
- To protect the electrode, it is recommended to attach the protective cover to the tip of the unit.
(2) Flip open the cap for the refill port.
(3) Connect the unit to the indicator, and then turn on the indicator.
(4) Immerse the glass electrode in the measurement sample to a depth of about 8 cm.
- Calibrate the unit before measurement as necessary.
Instruction Manual
Standard Probe Model 640S-1
3
4
2
1
12
9
10
⑤ Internal reference electrode
⑥ Electrode holding tube
⑦ Refill port for the inner solution
⑧ Sensor cord
7
6
5
8
⑨ pH sensor connection plug
⑩
Tem. sensor connection plug
⑪
Electrode cap
⑫ Electrode protection cap