04.09
猯
DIGITAL INSULATION METER
INSTRUCTION MANUAL
Page 1: ...04 09 猯 DIGITAL INSULATION METER INSTRUCTION MANUAL ...
Page 2: ...nder this marking must be observed strictly to prevent human injuries including burns and electric shock The handling information under this marking should be observed carefully to prevent damage to the instrument and associated equipment Other symbols used with the instrument and in this manual Indicates a risk of shock due to a high voltage generated or applied at a measuring terminal E Insulati...
Page 3: ...ds 5 If the insulation coating of a test lead is damaged or its conductor wire is exposed do not attempt to repair it Instead replace with a new test lead 6 Do not switch the measuring function during measure ment 7 Do not use the instrument when it is moistened when your hand is wet or when the ambient humidity is high 85 RH or more 8 Do not touch the metallic parts of the test leads during measu...
Page 4: ...IS C1302 1994 2 2 Features 1 Each instrument is capable of switching the voltages applied during insulation resistance measurement in the following 2 ranges Model DG525 500 V DC 250 V DC Model DG251 250 V DC 125 V DC 2 With both measuring functions automatic range switching can be used to switch the range according to the measurement value 3 Even when the user forgets to switch the power off after...
Page 5: ...yellow LED 4 POWER switch 5 INSUL TEST VOLT ON Insulation test voltage ON indicator red LED 6 Function switch 7 LIGHT back light switch 8 Red test lead for L terminal 9 Black test lead for E terminal 10 Aligator clip adapter Reference When the point of 9 lead is inserted into clip adapter 10 9 will come to work as clip lead It will make mesurement multipurpose TL M54 ...
Page 6: ...nute as a safeguard for when you forget to set the POWER switch to OFF after use Still we recommend pressing the POWER switch to OFF after measurement to save the power of the built in batteries NOTE Operation of the HOLD Switch To hold a measurement value press the HOLD switch above the POWER switch The HOLD indicator yellow LED light up and the current measurement value will be held in memory Pr...
Page 7: ...or no battery has been loaded In this case remove the battery cover on the rear case and insert new batteries as described in section 4 3 Replacing the Built in Batteries on the next page 6 If the INSUL TEST VOLT ON indicator does not light and the LCD shows nothing although unexhausted batteries are loaded it is possible that the battery terminal contacts have failed In this case remove the batte...
Page 8: ... center Fig 3 A with your finger and insert batteries in correct polarity positions as shown by Fig 3 B 4 After checking that the batteries have been inserted correctly place the battery cover in the original position on the rear case and fasten with the lock screw 1 Always use the specified batteries LR6 AA size alkaline batteries 2 To prevent performance degradation replace all six batteries wit...
Page 9: ...s capacitive objects for example may retain the voltage applied from this instrument for some time after the completion of the measurement 1 Set the function switch according to the measurement object to 500 V or 250 V with Model DG525 or to 250 V or 125 V with Model DG251 2 Connect the black plug of the black test lead to the E terminal on the left and the amber plug of the red test lead to the L...
Page 10: ...ent points is not necessary NOTE In Case the B Marking is Displayed During Measurement When the resistance measurement value in an insulation test is extremely small the LCD sometimes shows the B marking which is usually used as the battery alarm indicator In the present case the B marking is displayed because an extremely small resistance measurement value means consumption of large battery curre...
Page 11: ...F or set the function switch to OFF 5 Maintenance Management This section contains important information for maintenance The maintenance of the instrument should be performed by managing personnel who understand the instrument and this manual in detail and who are well acquainted with handling the instrument 5 1 Maintenance Inspections Be sure to maintain and inspect to ensure safe long lasting op...
Page 12: ... 5 3 Storage 1 The panel and rear case are not resistant to volatile solvents or heat Do not attempt to clean them with lacquer thinner or alcohol or place the instrument near a source of heat To clean the instrument wipe lightly with a soft dry cloth 2 Do not store the instrument in a place subject to vibration or where the instrument may drop 3 Do not store the instrument under direct sunlight u...
Page 13: ... 250 kΩ 125 V DC range 150 V 20 max 125 V guaranteed at 125 kΩ When measuring terminals are shorted Approx 1 5 mA max 3 Measuring ranges 0 to 2 MΩ 1 to 20MΩ 10 to 200MΩ 100 to 2000MΩ 4 auto range switching 4 Measuring accuracy 2 MΩ 20 MΩ 200 MΩ ranges Within 2 of reading 2 digits 2000 MΩ range Within 5 of reading 2 digits 5 Applied voltage indication Red LED with 5 mm dia 6 2 AC Voltage Measuring ...
Page 14: ...sistance measurement measuring terminals open Approx 60 hours AC voltage measurement Approx 250 hours 9 Battery alarm LCD shows B marking when battery voltage drops below 7 V 10 Auto power OFF time Approx 1 minute after power ON 11 Data hold Pressing HOLD switch holds measure ment value HOLD indicator Yellow LED with 3 mm dia 12 Back light lamp Pressing LIGHT switch lights up LCD back light green ...
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