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Table of Contents 

 

 

 
 

 

 

 

 
 
 

 
 
 
 
 
 
 
 
 
 
 

 
 

 

 
 

 
 

 

Topic 

Page

 

 

 

Description 

3

 

 

 

Preparing Meter & Reference  

4

 

Electrode for Use 

 

 

 

Maintaining & Checking 

6

 

Your Reference Electrode 

 

 

 

Structure-To-Soil 

6

 

(or Water) Potential 
Readings 

 

 

 

Structure-to-Structure 
Potential Difference 
Readings 

 

 

 

Cell-to-Cell Potential 
Difference Readings 

    7

 

 

 

Installing New Battery 

8

 

 

Trouble-shooting 

 

10

 

 

Precautions 

 

10

 

 

Specifications 
 

 

11 

 

 

 

 

 

                                

 

Summary of Contents for 4110

Page 1: ...640 U S Highway 1 Sebastian Florida U S A Tele 1 772 794 9448 Fax 1 772 589 9072 Website www mcmiller com email sales mcmiller com MAN150 Revised1 4 2022 MAN150 Model DPM Digital Potential Meter Reference Manual Part 4110 ...

Page 2: ...e for Use Maintaining Checking 6 Your Reference Electrode Structure To Soil 6 or Water Potential Readings Structure to Structure Potential Difference Readings 7 Cell to Cell Potential Difference Readings 7 Installing New Battery 8 Trouble shooting 10 Precautions 10 Specifications 11 ...

Page 3: ...pletely filled reference electrode attached The DPM meter comes complete with reference electrode test lead manual and a padded carrying case The DPM is an indicating type meter and does not store readings of any kind Since potential measurements are by far the most common measurement made by the corrosion engineers you will find the DPM to be extremely useful for a large number of applications as...

Page 4: ...curely tightened shake the electrode a few times to help the copper sulphate crystals to dissolve Wait several minutes and check inside of tube to make sure that there are some undissolved crystals visible in the tube This is to ensure that the solution is saturated If there are no crystals remaining after shaking the tube open up the tube and add more copper sulphate crystals Don t worry you can ...

Page 5: ...d brass thumb nut B Electrode tube filled with distilled water or MCM s Antifreeze Solution C Copper sulphate crystals must always show some visible in the tube D Porous ceramic tube E Orange plastic protective cap remove when taking readings ...

Page 6: ... the soil Connect the clip end of the test lead onto the metallic structure being tested Make sure that the contact point with structure is clean and shiny Press and hold the 2V range push button Read and record the voltage value obtained unless the meter indicates 1 which indicates an over range condition Switch meter to 20V range by pressing and holding both push buttons in such a case If the me...

Page 7: ...rew the brass fitting on the end of the SUB171 test lead onto the DPM in place of the electrode and connect the other test lead to the banana jack on the DPM You would then connect the test leads to the two separate structures for a potential difference reading Cell to Cell Potential Difference Readings A cell to cell potential difference reading can be taken using the equipment indicated below A ...

Page 8: ...top of the meter body should be temporarily removed and any accumulated moisture should be allowed to evaporate before placing the meter back in use It is a good idea to store the meter and electrode in the padded case when not in use Please consult M C Miller s instruction manual titled How to Prepare and Maintain Portable M C Miller Copper Sulfate Reference Electrodes which is Manual 270 for det...

Page 9: ...V battery and reinstall the spring battery retaining clip Slide meter assembly back into its case and insert the three 4 40 screws making sure that the meter is correctly aligned as specified above TOP OF METER WITH ORANGE PROTECTIVE COVER REMOVED A 3 SCREWS Remove to get to Battery Accessing the 9V Battery ...

Page 10: ... contacting the copper rod and that the orange plastic cap has been removed from the bottom of the electrode tube so that the moist porous plug can contact the soil or water properly Also check to see that there are some excess un dissolved copper sulfate crystals in the electrode tube If the meter battery and electrode appear to be normal but the reading is not obtained or is intermittent check t...

Page 11: ... Accuracy over most of temperature range 1 at limits of operating temperature range Weatherproofed meter case can be floated in water momentarily 20 mega ohm input resistance on both ranges AC filter eliminates error caused by 60Hz AC up to 50V on 2V range up to 100V on 20V range Temperature range of operation 4F to 185F Operates on one 9V battery Weight including carrying case approximately 3 lbs...

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