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52084187 REV 0

© 2018 Greenlee Textron 

01/18

CMGRT-100A

CLAMP-ON GROUND 

RESISTANCE TESTER

INSTRUCTION MANUAL 

Ω

MEM

OFF

+ A

A

MR

SET-UP

HOLD

600 V CATIV 40A  ~

99 Washington Street 
Melrose, MA 02176 
Phone 781-665-1400
Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Содержание GREENLEE CMGRT-100A

Страница 1: ...CMGRT 100A CLAMP ON GROUND RESISTANCE TESTER INSTRUCTION MANUAL MEM OFF A A MR SET UP HOLD 600 V CATIV 40A 99 Washington Street Melrose MA 02176 Phone 781 665 1400 Toll Free 1 800 517 8431 Visit us a...

Страница 2: ...tures 9 22 Rotary Switch Positions 9 Alarm Feature and Set up 10 Navigation 10 Set up Menus 11 19 Memory 22 Auto Power Off 22 Measurement Mode 22 Theory of Operation 23 Operation 24 Typical Applicatio...

Страница 3: ...al in the use and maintenance of Greenlee tools and equipment This instruction manual and any markings on the tool provide information for avoiding hazards and unsafe practices related to the use of t...

Страница 4: ...jury or property damage The signal word defined below indicates the severity of the hazard The message after the signal word provides information for preventing or avoiding the hazard SAFETY ALERT SYM...

Страница 5: ...Inspect the test leads or accessory before use They must be clean and dry and the insulation must be in good condition Do not use the test lead if the contrasting inner layer of insulation is visible...

Страница 6: ...ngs could result in severe injury or death Electric shock hazard Do not change the measurement function while the test leads are connected to a component or circuit Do not clamp the jaw around a condu...

Страница 7: ...isplays 8 HOLD Button 9 OLED Display 10 Calibration Loop 52084190 Symbols on the Unit Warning Read the instruction manual Warning Risk of Electric Shock Double insulation Application around or removal...

Страница 8: ...18 Hazardous Voltage Blinks when Voltage exceeds 50V 19 Alarm Threshold High Low Indicator 20 Alarm Threshold Display 21 Units of Alarm Displayed 22 Units of Main Display 23 Units of Top Display Loop...

Страница 9: ...es are listed below Low pitched with short intervals Normal instrument operations Low pitched with a permanent signal Alarm thresholds triggered for either or A High pitched with a short intervals Irr...

Страница 10: ...s menu When the user enters the menu tree the selected menu starts blinking indicating the state of the menu Product Features cont d No Function 1 Erase stored data 2 Enables disable audible alarm 3 E...

Страница 11: ...EM 0 Return to the previous menu by 2 SNd Enable Disable Audible Alarm Enter menu by SNd blinks Press or to enable disable alarm sound Alarm enabled when icon is visible and disabled when it is masked...

Страница 12: ...s menu by 4 AL Impedance Alarm Threshold Enter menu by AL blinks Press or to select state of the alarm Disabled Enabled for a measurement exceeding the threshold Enabled for a measurement below the th...

Страница 13: ...P HOLD MEM OFF A A MR SET UP HOLD MEM OFF A A MR SET UP HOLD MEM OFF A A MR SET UP HOLD 4 AL Impedance Alarm Threshold cont d Setting the Alarm Value Press or to select the impedance alarm threshold V...

Страница 14: ...triggered for measurements exceeding threshold Enter the menu tree further to select an alarm threshold and return to main menu Setting the Alarm Value Press or to select the impedance alarm threshol...

Страница 15: ...ress or to select the impedance alarm threshold Validate by Note Current Alarm can only be triggered for measurements exceeding threshold Enter the menu tree further to select an alarm threshold and r...

Страница 16: ...to select the month and validate by Press or to select the date Validate and return to the previous menu by Product Features cont d MEM OFF A A MR SET UP HOLD MEM OFF A A MR SET UP HOLD MEM OFF A A M...

Страница 17: ...r menu by HOUR blinks Press or to select AM PM or a 24 hour display mode 24H which blinks Validate by Press or to select the hour which blinks Validate by Press or to select the minutes value which bl...

Страница 18: ...OUR Set Time cont d Product Features cont d MEM OFF A A MR SET UP HOLD MEM OFF A A MR SET UP HOLD MEM OFF A A MR SET UP HOLD MEM OFF A A MR SET UP HOLD MEM OFF A A MR SET UP HOLD MEM OFF A A MR SET UP...

Страница 19: ...en Standard or Advanced Mode Advanced Mode The icon is displayed Standard Mode Std is displayed Validate and return to the previous menu by Product Features cont d MEM OFF A A MR SET UP HOLD MEM OFF A...

Страница 20: ...r available transposition frequencies for measured impedance Validate and return to the previous menu by Product Features cont d MEM OFF A A MR SET UP HOLD MEM OFF A A MR SET UP HOLD MEM OFF A A MR SE...

Страница 21: ...menu Use movement buttons to enable or disable AUTO HOLD It is enabled when icon is displayed Product Features cont d MEM OFF A A MR SET UP HOLD MEM OFF A A MR SET UP HOLD MEM OFF A A MR SET UP HOLD M...

Страница 22: ...it automatically powers off to save extend battery life Measurement Modes 1 Standard Mode Only one measurement screen is available The loop impedance and the leakage current is displayed Measurement...

Страница 23: ...1 1 1 Ri n i 1 V I Rx Rx 1 1 Ri n i 1 1 1 Ri n i 1 V I Rx Rx 1 1 Ri n i 1 1 1 Ri 100 i 1 where usually The equation shown above is the standard equation for finding the resistance of one leg of a para...

Страница 24: ...ding s from the circuit or component to be tested If the ground current exceeds 5 A or if the noise exceeds 50 V the CMGRT 100A will not measure the resistance accurately Make a note of the location f...

Страница 25: ...y around the conductor 2 Center the conductor in the jaw for highest accuracy 3 Take the reading 4 Replace the molding Service Entrance or Meter Note Clamp onto the conductor between the service neutr...

Страница 26: ...s and central office grounds The test is effective and accurate when the ground window is connected to the utility ground at only one point Service Panel At a service panel several sources may be grou...

Страница 27: ...round and the power utility ground Note Clamp onto the ground conduc tor as shown or onto the ground rod Phone Pedestal Ground Bar Sheath Connection Ground Level Ground Rod 1 Remove ground bar connect...

Страница 28: ...tor verifies not only the ground electrode resistance but also the connections of the ground wire to the rest of the system Q Does the system under test have to be energized or de energized to perform...

Страница 29: ...0 10 600 to 1200 50 20 approximately 1200 to 1500 50 25 approximately Measurement Range Resolution Accuracy 0 1 to 5 0V 0 1V 5 0 1V 5 0 to 50 0V 0 5V 5 0 5V 50 0 to 75 0V 1V 10 1V Measurement Range R...

Страница 30: ...ational safety standard for insulation coordination as it applies to measurement control and laboratory equipment These overvoltage categories are explained in more detail by the International Electro...

Страница 31: ...ew it before validating instrument operation Cleaning Periodically wipe the case with a damp cloth and mild detergent do not use abrasives or solvents If the meter will not be used for periods longer...

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