1. PREPARATION

1. Remove either end of the electrode and fill with water. (Distilled water preferred) 

2. Replace the end piece, making sure both ends are on firmly to affect proper sealing. 

3. Shake electrode to obtain proper solution saturation. 

Note: All Tinker & Rasor Half Cell ceramic tips are pretreated with Copper Sulfate solution to affect rapid wetting on initial preparation for first time usage.
 

Replacing Copper Sulfate Crystals: 

Using the Tinker & Rasor replacement Copper Sulfate Crystals, remove the tip end and fill half cell 2/3 full.

Fill with water, leaving enough room at the top to screw the tip assembly back on.

Store half cell horizontally, or vertically with tip assembly down, for approximately one (1) hour to saturate tip.

2. OPERATION

1. Remove the vinyl protective cap from the ceramic porous plug. 

2. Place ceramic plug in contact with moist soil or water and connect top copper terminal of 
    the electrode to appropriate voltmeter. 

3. Make connection from the voltmeter to structure under test. 

4. Observe polarity and voltage that is usually below two-volt range. 

5. Always replace the vinyl cover on the electrode after each usage to prevent moisture loss 
     in the ceramic plug. 
 
 

3. SERVICE

1. Observe the drawing supplied with each Half-Cell and screw the adapter onto the Half-Cell
     electrode leaving approximately 1/2 turn before compressing the large "O" ring seal. 

2. Strip 1/4" of insulation from end of #18 Ga. stranded test lead wire and insert stripped end
     into the brass hex fitting, making sure small "O" ring is in place over the insulated part of
     test lead. Push test lead into the brass fitting as far as possible. Tighten hex nut firmly. 

3. After hex nut is secured, hand tighten adapter to Half Cell firmly to affect the "O" ring seal 
     between adapter and electrode. 

4. Test lead wire should have no discontinuities in the portion that will be submerged and the
     Half Cell should be filled completely so pressure will not force water into the electrode and
     contaminate the copper sulfate solution. 

5. The Model W-7 can be used with most reference electrodes utilizing 1/4-20 threads. 
 
 

4. SHIPPING INSTRUCTIONS 

All instruments being returned for repair should be sent PREPAID to either address below: 

Tinker & Rasor
417 Agostino Road
P.O. Box 281
San Gabriel, CA 91778