IDEAL 61-920 Instruction Manual Download Page 1

Page: 1 / 20

#61-920

Ground Clamp Resistance Meter

Instruction Manual

ND 5417-1 61-920 Ins 9/26/06 8:49 AM Page 1

99 Washington Street
Melrose, MA 02176
Fax 781-665-0780
TestEquipmentDepot.com

Summary of Contents for 61-920

Page 1: ...61 920 Ground Clamp Resistance Meter Instruction Manual ND 5417 1 61 920 Ins 9 26 06 8 49 AM Page 1 99 Washington Street Melrose MA 02176 Fax 781 665 0780 TestEquipmentDepot com...

Page 2: ...measurement of current 11 7 2 Measurement of balance leakage current 11 7 3 Measurement of earth resistance 12 8 Other functions 14 8 1 Auto power off feature 14 8 2 Data hold feature 14 8 3 Continui...

Page 3: ...around energized electrical equipment 5 Do not attempt to use the ground tester to twist or pry the ground electrode or ground wire away from the equipment being grounded 6 All metal objects or wires...

Page 4: ...ot install substitute parts or make any modification to the instrument Return the instrument to IDEAL INDUSTRIES INC Attn Repair Department 1000 Park Avenue Sycamore IL 60178 Do not try to replace the...

Page 5: ...due to harmonics Auto power off feature powers the meter down automatically after 10 minutes of non use to conserve battery power Data hold feature is used to capture and hold a reading in the LCD dis...

Page 6: ...quency Approx 2400Hz Dual Integration AC current function Successive Approximation True RMS Display Liquid crystal display with a maximum count of 2099 Over range indication OL is displayed when input...

Page 7: ...currents and voltages are expressed in effective values which are also referred to as RMS Root Mean Square values The effective value is the square root of the average of square of alternating current...

Page 8: ...he measured value or to view the measured data in memory Save button Saves the measured value Data number 1 to 100 Unit Measured value Marks to be displayed on the LCD Displayed when saving the measur...

Page 9: ...th resistances as R1 R2 Rn Of these earth resistances R1 R2 Rn can be considered connected in parallel and can be regarded as a combined resistance Rs The Rs can be regarded small enough against Rx si...

Page 10: ...regarded as Rx because Rs can be regarded small enough against Rx CAUTION This meter cannot support the measurement for the locations with the following earth systems Single earth that is not connect...

Page 11: ...the display is legible and the mark is not displayed on the LCD Otherwise replace the batteries to ensure accurate measurements and proper storage of data points 2 Verify the correct measurement of e...

Page 12: ...are highly sensitive Because of the characteristics of the transformer jaws it is impossible to eliminate the interference of an external magnetic field completely If there is a large magnetic field n...

Page 13: ...s through a ground wire can also be measured by this method 7 2 Measurement of Balanced leakage current Press the Function button and select the ACA function Confirm the displayed unit is mA and the M...

Page 14: ...ion Note the reading after it becomes stable Measurement procedure Press the Function button and select the Earth resistance function Confirm that the displayed unit of measure is and MEM is not displ...

Page 15: ...ound electrode in a street lighting system Earth resistance measurement of a grounding electrode in a lightning protection system Page 15 ND 5417 1 61 920 Ins 9 26 06 8 49 AM Page 15 Test Equipment De...

Page 16: ...st varies The mark is shown in the upper right corner of the LCD To exit the Data hold mode press the Data hold button again The mark should disappear from the display When the Auto power off feature...

Page 17: ...activate the memory function press the memory mode button The MEM symbol is displayed on the LCD Pressing the cursor or changes the data number displayed on the LCD and the measurement result in memo...

Page 18: ...tation illustrated inside the battery compartment to ensure correct polarity 6 Re install the battery cover and tighten the screw WARNING In order to avoid possible shock hazard remove the meter from...

Page 19: ...re IL 60178 For repair the calibration plate used for proper operation check must be returned with the meter Before returning the instrument make sure a Operating instructions have been followed b Bat...

Page 20: ...ale of an IDEAL product including but not limited to implied war ranties of merchantability and fitness for a particular purpose are limited to the above The manufacturer shall not be liable for loss...