Related Manuals for AEMC 6471
Summary of Contents for AEMC 6471
- Page 1 6471 DIGITAL GROUND RESISTANCE AND SOIL RESISTIVITY TESTER E N G L I S H User Manual ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
- Page 2 Catalog #: ______________________________ Model #: 6471 Please fill in the appropriate date as indicated: Date Received: _________________________________ _______________________ Date Calibration Due: Chauvin Arnoux , Inc. ® d.b.a AEMC Instruments ® ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
- Page 3 Do not dispose of the battery pack with other solid waste. Used batteries must be entrusted to a qualified recycling company or to a company specialized in processing hazardous materials. ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
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Page 4: Table Of Contents
Environmental ..................24 Safety ....................24 4. OPERATION .................. 25 General Operating Instructions ............25 4.1.1 Automatic Mode ..............25 4.1.2 Manual (Expert) Mode ............25 Instrument Configuration (SET-UP mode) .........26 Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... - Page 5 Measurements with Two Clamps ............49 Smoothing ..................49 7. MEMORY FUNCTION ..............50 Saving Measurements into Memory...........50 Recalling Measurements from Memory ..........51 Erasing Measurements from Memory ..........51 Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
- Page 6 8. DATAVIEW SOFTWARE ..............53 ® ® Installing DataView ................53 Connecting the Model 6471 to your Computer ........57 Opening the Ground Tester Control Panel .........57 8.3.1 Establishing Communication to the Instrument.....58 Configuring the Instrument ..............59 8.4.1 DC Continuity Test ..............59 8.4.2...
- Page 7 10.1.4 Out of Limits Indicators ............76 10.1.5 Error Messages ..............78 APPENDIX A: GLOSSARY OF TERMS............ 79 Basic Terminologies ..................79 Glossary ......................80 Limited Warranty ....................84 Warranty Repairs ....................84 Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
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Page 8: Introduction
(thunderstorms). It is up to the operator to decide whether to continue or postpone measurements in these situations. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 9: International Electrical Symbols
Save the damaged packing container to substantiate your claim. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 10: Ordering Information
® software, ground tester workbook and user manual. Ground Resistance Tester Model 6471 Kit (300 ft) ......Cat. #2135.50 Includes meter, two carrying bags, two 300 ft color-coded leads on spools (red/blue), two 100 ft color-coded leads (hand-tied, green/black), two 5 ft color-coded leads (red/blue), set of... - Page 11 Safety Alligator Clip - Green (Rated 600V CAT IV, 10A) ....Cat. #2140.69 Replacement - Battery, Rechargeable NiMH 9.6V ......Cat. #2960.21 Replacement - Power Adapter 110/240V & Power Cord 115V US ...Cat. #5000.13 Replacement - Power Cord 115V US Plug ........Cat. #5000.14 Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664...
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Page 12: Product Features
The Model 6471 is CAT IV rated to 50V and is over voltage protected to more than 250V against accidental connection to live circuits. The voltage is also displayed on screen. -
Page 13: Key Features
Grounding standards IEC 61557 parts 4 and 5 compliant • Includes DataView software for data storage, real-time display, analysis, re- ® port generation and system configuration Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... -
Page 14: Control Features
Rotary switch: OFF position, 5 measurement functions (see § 5 and 6) and SET-UP function (see § 4.2). START/STOP button: Starts the measurement and compensates for the leads (in the mΩ measurement function - see § 5.2.1). Six function buttons (see § 2.5). Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 15: Display
If this symbol blinks during an active measurement, the limits of use have been exceeded. If the symbol appears constant during an active measurement, the values to be measured are unstable. Warning buzzer is activated Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... - Page 16 Indicates whether the 3-Pole EARTH measurement or the EARTH COUPLING COUPLING measurement has been selected. S x 1/10 Symbol not used in Model 6471 Symbol not used in Model 6471 Symbol not used in Model 6471 OBJ:TEST Object and test number for storage in memory.
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Page 17: Button Functions
Hz/OPTIONS: Enables configuration of measurement functions. z/OPTIONS/ DISTANCE: Available for soil resistivity and V potential measurements. It DISTANCE allows the setting of values of distances used for Rho (ρ) calculation. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... -
Page 18: Specifications
Voltages of more than 75Vrms lead to error message 31 (excessive external voltage) or 32 (voltage measurement overrange). If terminals H (Z) and E (X) are put into contact with the line voltage, the protection fuse will blow. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 19: Current Measurements
± (5% + 2cts) ± (3% + 2cts) 0.5 to 100mA Operating error from > 20% ± (10% + 2cts) ± (5% + 2cts) 0.1 to 40.0A Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... -
Page 20: Dc Resistance Measurements
± (7% + 2cts) 0.1 to 40.0A (1): The Model 6471 cannot detect whether a current clamp SR182 or MN82 is connected. In the case of the MN82 clamp, with currents > 10A and frequencies < 100Hz the instrument will not display any warning messages. -
Page 21: Ac Earth/Ground Resistance Measurements
The START button must be pressed for more than 2 s. For frequencies between 41 and 256Hz, the resistance of the auxiliary earth electrodes is measured at the test frequency set. At higher frequencies the resistance is measured at 256Hz. Ground Resistance Tester Model 6471 ShopAEMC www. - Page 22 Same characteristics as 4-Pole earth measurements with the following particular conditions: Minimum current: SR182, I >0.5mA MN82, I >2mA Maximum R ratio: SR182, (R ) <500 MN82, (R ) <120 with R <20Ω Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
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Page 23: Soil Resistivity Measurement Ρ
R assumed to be identi- ρ ρ ρ ρ cal. Note: With a test voltage U of 16V, halve the value of R Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... -
Page 24: Earth/Ground Measurements With 2 Clamps
(1): Observe the minimum distance between the two clamps according to table in § 5.7. 3.3 Data Storage Memory Capacity: 512 test results (64kB) Communication: Optically isolated USB Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... -
Page 25: Power
Dimensions: 10.7 x 9.76 x 5.12" (272 x 248 x 130mm) Weight: 7 lbs (3.2kg) approx Case Material: ULV0 Polypropylene Terminals: 4mm recessed banana jacks Case Protection: EN 60529 - IP53 (cover closed) Drop Test: Per EN 61010-1 Vibration Test: Per EN 61557-1 Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... -
Page 26: Environmental
Electrical safety according to EN 61010-1 (Ed. 2 of 2001) Measurement according to EN 61557 (Ed. 2 of 2007) parts 1, 4 and 5. CAT IV, 50V Pollution Degree 2 *Specifications are subject to change at any time without notice Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 27: Operation
Understanding Ground Resistance Testing Workbook CD that was included with the instrument. 4.1 General Operating Instructions The Model 6471 has operating modes: • Automatic mode for routine applications. • Manual (Expert) mode in which the user can change the parameters of the measurement functions. -
Page 28: Instrument Configuration (Set-Up Mode)
• To record the information into memory, use the MEM button (see § 7). 4.2 Instrument Configuration (SET-UP mode) To configure the Model 6471 parameters, turn the rotary switch to SET-UP: • All the segments on the display are activated for 1 second and then the “PUSH button”... -
Page 29: Automatic Mode
5.2 Resistance Measurement mΩ (2-Wire) WARNING: Before performing the resistance test, verify that the sample under test is not energized. Set the switch to Connect the resistance to terminals H (Z) and E (X). Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 30: Lead Compensation Measurement
The 6471 makes a measurement with a positive current (R+), then reverses the direction of the current and makes another measurement with negative (R-). ± ± Ω Ω (R+) + (R-) ALARM ALARM Ω Ω Ω Ω AUTO AUTO To display the measurement parameters, press DISPLAY several times. -
Page 31: Alarm Function
ON or OFF type of alarm high (>) alarm Set the value of the alarm Complete the adjustment between 1 and 999Ω of the alarm setting Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... -
Page 32: Resistance Measurement Mω (4-Wire)
Hz/OPTIONS again WARNING: Before performing the resistance test, verify that the sample under test is not energized. Set the switch to Connect the resistance to all 4 terminals. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... -
Page 33: Earth/Ground Measurement (3-Pole)
A > 80 m In order to avoid electromagnetic interference, it is best to unwind the full length of each cable from the reel, to keep the cables as far apart as possible on the ground, Ground Resistance Tester Model 6471 ShopAEMC www. - Page 34 To display the measurement parameters, press DISPLAY several times. The device displays the following parameters: , U-Act (U and its frequency, U and its frequency). Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
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Page 35: Full Method
R30 R40 % H - E Take the average of the 3 or 4 readings on the R40 + R50 + R60 + R70 plateau to obtain the earth electrode resistance. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 36: Recommendations For A Reliable Measurement
Avoid routing the connecting cables of the earth electrodes near or parallel to other cables (transmission or supply), metallic conductors, rails, or fences: high test fre- quencies may cause cross-talk and affect the measurements. Ground Resistance Tester Model 6471 ShopAEMC www. -
Page 37: Earth/Ground Measurement (4-Pole)
To measure the resistances of auxiliary electrodes H (Z) and S (Y), or if the resis- tance of the electrodes is too large (see § 10.1), start the measurement with a long press of the START/STOP button. will be displayed. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 38: Measurements With A Clamp
For this selective earth measurement you need a current clamp, either an SR182 (provided) or an MN82 (available as an accessory). These two types of current clamps are specially designed to work with the 6471 ground tester. The SR182 is more precise, suited to the measurement of higher currents (up to... - Page 39 (see § 10.1), start the measurement with a long press of the START/STOP button. will be displayed. Ω kΩ > 2s kΩ AUTO Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
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Page 40: Soil Resistivity Measurements ( Ρ Position)
DC soundings will be limited to simple, will be limited to simple, horizontal; layered horizontal; layered structures structures. Source: DC Resistivity - T. Boyd Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... -
Page 41: Changing The Measurement Method
ρ remains S-ES indeterminate. Set the switch to Press the 2nd button, then the DISTANCE button. The "hundredths" will blink. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... -
Page 42: Wenner Method
Program the distance into the instrument as described in § 5.6.3. In order to avoid electromagnetic interference, it is best to unwind the full length of each cable from the reel, to keep the cables as far apart as possible on the ground, Ground Resistance Tester Model 6471 ShopAEMC www. -
Page 43: Schlumberger Method
Drive the electrodes to a depth p of not more than 1/20 of d. Connect the cables to the electrodes, then to terminals H (Z), S (Y), ES (Xv), and E (X). Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... - Page 44 E (X), or if the resistance of the electrodes is too high (see § 10.1), start the measurement by a long press of the START/STOP button. and R , then R and R will be displayed. P-ES Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
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Page 45: Earth/Ground Measurements With Two Clamps
LOOP NOTE: Use only SR182 or MN82 current clamps, which are specially designed to operate with the Model 6471. Set the switch to Connect a clamp to terminal H (Z) and clamp it to a point down stream from the rod under test that is a serial path to the earth. - Page 46 NOTE: In the AUTO mode, the measurement frequency is 1611Hz. To make an earth measurement that is free of inductive effects, you must change to MANUAL mode and choose a lower measurement frequency (see §6.2). Ground Resistance Tester Model 6471 ShopAEMC www.
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Page 47: Manual Mode
If there are signals with a frequency that could interfere with the chosen test fre- quency, the NOISE symbol will appear. While in MANUAL mode, change the frequency by pressing the Hz/OPTIONS button until the frequency flashes. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 48: Manual Settings For Mω Measurements
• The device must be in manual mode. • The alarm function must be active (On). • The alarm threshold must be low (<). • The buzzer must be activated (bEEP On). Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 49: 3-Pole Earth/Ground Measurements & Coupling
• Stop the measurement by pressing the START/STOP button. The MEM symbol flashes to indicate that this result must be recorded in memory. Press the MEM button twice. To save to another location, refer to §7.1. Ground Resistance Tester Model 6471 ShopAEMC www. - Page 50 R if long press of START/STOP EARTH COUPLING 3 and frequency, I , U-In (U and frequency). EARTH COUPLING 4 and its frequency. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
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Page 51: 4-Pole Earth/Ground Measurements
In the manual mode, you can activate or deactivate the smoothing of the measure- ment results by pressing the 2nd + DISPLAY (SMOOTH) buttons. This smoothing consists in displaying an exponential mean value, a significant help with highly fluctuating values. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 52: Memory Function
It will be possible to overwrite values already stored with new ones having the same distance d, or even to add new results having other values for the distance d provided that all of the other measurement parameters are identical. Ground Resistance Tester Model 6471 ShopAEMC www. -
Page 53: Recalling Measurements From Memory
Press the button. • Press the MR button. The Object and Test numbers of the last stored test ap- pear, with the Object number blinking. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... - Page 54 When a test is deleted, its Object/Test number is removed from memory. When you subsequently view stored tests, this number will be skipped. This Object/Test num- ber combination remains unavailable for storing tests until you completely erase memory, as instructed in Section 7.3.1. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664...
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Page 55: Dataview ® Software
NOTE: If Autorun is disabled, it will be necessary to open Windows Explorer, then locate and open the USB stick drive labeled “DataView” to view the files on the drive. In the AutoPlay window, select Open Folder to view Files. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... - Page 56 DataView ® DataView, Version x.xx.xxxx option should be selected by default. Select the desired language and then click on Install. The Installation Wizard window will appear. Click Next. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
- Page 57 Next. NOTE: The PDF-XChange option must be selected to be able to generate PDF reports from within DataView ® Figure 8-2 Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
- Page 58 NOTE: If you connected your instrument to the computer before installing the software and drivers, you may need to use the Add/Remove Hardware utility to remove the instrument driver before repeating the process. Ground Resistance Tester Model 6471 ShopAEMC www.
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Page 59: Connecting The Model 6471 To Your Computer
8.2 Connecting the Model 6471 to your Computer The Model 6471 is supplied with an optically isolated USB interface cable required for connecting the instrument to the computer. This cable (Cat. #2135.41) is equipped with a USB type A on one end, and an optical connector on the other end. -
Page 60: Establishing Communication To The Instrument
Figure 8-5 • Once the proper communication parameters have been specified, click OK. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... -
Page 61: Configuring The Instrument
When DC Continuity is selected from the tool bar, you can: • Select a 2- or 4-Wire test. • Select a test current (positive, negative or Auto ±). • Enter and activate an alarm from 1 to 999Ω (2-Wire only), if desired. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 62: 3-Pole Ground Resistance Test
• Auto frequency - selects the optimum frequency (from 41 to 513Hz), usually 128Hz, or select manually from the drop-down frequency list. Selecting a sweep frequency test from the drop-down list will enable the sweep table selection. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 63: 4-Pole Ground Resistance
128Hz, or select manually from the drop-down frequency list. Selecting a sweep frequency test from the drop-down list will enable the sweep table selection. The Input Noise option allows the viewing of noise for Z or Y inputs. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 64: 3-Pole Plus Clamp Resistance
Current probe and lead are both connected at the test point. Multiple test points can be measured by moving the probe with its lead to a new location, but not mov- ing the current and potential electrodes. Ground Resistance Tester Model 6471 ShopAEMC www. -
Page 65: 4-Pole Soil Resistivity
• Distances - the distance “d” (for Wenner test method) or “d” and “a” (for Sch- lumberger test method), between the test electrodes, needs to be entered for resistivity calculation to read out directly in Rho. Ground Resistance Tester Model 6471 ShopAEMC www. -
Page 66: Ground Loop R
Z and Xv terminals. When Ground Loop R is selected from the tool bar, you can select: • Auto frequency - selects the optimum frequency (from 1367 to 1758Hz), usually 1367Hz, or select manually from the drop-down frequency list. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 67: Tools Menu
• Set number display as scientific (1000 as "1E+3") or letters (1000 as "1k"). • Set Label Terminals to be "X", "Xv", "Y", "Z", or "E", "ES", "S", H". • Set Measurement units to meter or feet • Set Rho units to Ohm-meter or Ohm-centimeter Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 68: Tools > Colors
5. Also, from the Instrument tree view, expand the sections under Recorded Data from the instrument, then click on a line that describes the re- corded data. It will bring up a window with a graph of the data. Ground Resistance Tester Model 6471 ShopAEMC www. -
Page 69: Recordings
Edit > Edit Session Properties. Figure 8-13 The Session Properties dialog allows you to specify Operator, Site and Custom parameters that are to be saved with recorded data. These parameters are used when generating reports. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 70: Saving/Exporting Data To A Spreadsheet Or Pdf File
NOTE: To export the data to a PDF from the Micro-ohmmeter Control Panel, first go to File > Create Dataview Report, save as a .dvb, then open the saved .dvb file from within DataView and perform the steps below. ® Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664... -
Page 71: Exporting Data To A Pdf From Dataview
In addition to the pre-designed report templates, DataView allows you to ® totally configure reports to your needs. Refer to the DataView HELP file on ® “Templates” to learn more about templates. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... -
Page 72: Maintenance
To test this fuse, turn the switch to the mΩ position (2-Wire), connect measurement leads to terminals H (Z) and E (X) and start a measurement. If the unit refuses to operate and the symbol for terminal H (Z) blinks, the fuse must be replaced. Ground Resistance Tester Model 6471 ShopAEMC www. - Page 73 (the four cylindrical holes on the back must slip over the four mounting pins on the front panel). Also make sure you do not pinch the battery leads or other wires or components. Ground Resistance Tester Model 6471 ShopAEMC www.
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Page 74: Recharging The Battery
(suitable for Europe and the U.S.). The frame of the battery symbol will blink during charging. Charging goes faster when the tester is turned off. The bat- tery voltage is shown on the large display next to Ubatt. Ground Resistance Tester Model 6471 ShopAEMC www. -
Page 75: Replacing The Battery
Battery is too cold for a fast charge (<0°C) - charging at a lower current bAtt FULL Battery is full - switch to trickle charging The 6471 tester can also be recharged from a 12V car outlet with a special charging unit. - Page 76 (3 to 5 times). Discharge cycle (15 H) can be made with the instrument in MANUAL mode, DC 2-Pole (2-Pole) resistance measurement and a short-circuit between H (Z) and E (X) plugs. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664...
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Page 77: Troubleshooting
R is too high. The flashing of terminal ES may also indicate that the cur- rent I measured by the clamp is too low. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... -
Page 78: Out Of Limits Indicators
• Values R and/or R are too high, • Measurement current I or I is too low, • The instability of the measurement is large. Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... - Page 79 > 42 V on the terminals of the device. (4) You should change to manual mode and modify the measurement voltage and/or frequency to make a valid measurement (when the NOISE symbol is no longer illuminated). Ground Resistance Tester Model 6471 ShopAEMC www.
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Page 80: Error Messages
10.1.5 Error Messages When started up, the Model 6471 device automatically performs a self-test. If a fault appears during this self-test or during a measurement, the device displays a message in the form Err XX. There are 3 categories of errors: • Harmless Errors 6, 7, 11 and 17 The message appears for approximately 1 second to inform the user. -
Page 81: Appendix A: Glossary Of Terms
An auxiliary electrode used for measuring the potential of the reference earth. The voltage, which is proportional to the resistance of the earth connection, is measured between this electrode and the earth electrode. Ground Resistance Tester Model 6471 ShopAEMC www. -
Page 82: Glossary
R d, A : distances to be programmed to calculate resistivity according to the measuring method used mΩ : measurement of low resistance /continuity Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:... - Page 83 : resistance of the earth loop measured with the "2 clamps" LOOP function : value of the R-Act resistance (PASS for "passive" PASS measurement with interference current circulating in the Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
- Page 84 In both cases, this value on the display is associated with its frequency. In this case, the resistances of the 4 stakes used for measurement are indicated by R P-ES Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664...
- Page 85 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
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Page 86: Limited Warranty
Limited Warranty The Model 6471 is warranted to the owner for a period of one year from the date of original purchase against defects in manufacture. This limited warranty is given by AEMC Instruments, not by the distributor from whom it was pur- ®... - Page 87 Notes: Ground Resistance Tester Model 6471 ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
- Page 88 04/16 99-MAN 100331 v12 Chauvin Arnoux , Inc. d.b.a. AEMC Instruments ® ® ShopAEMC www. .com 1.888.610.7664 Shop for AEMC products online at:...
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