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| Its simplicity of operation, accuracy, mechanical and electrical ruggedness, safety features |
| The MG 251 is a technology advanced hand held multi-function test instrument for measuring insulation resistance at test voltages of 250, 500 and 1000 volts. Additionally, it can be used to measure AC voltage, DC voltage and low resistance (continuity). Its simplicity of operation, accuracy, mechanical and electrical ruggedness, safety features, and multiple ranges and functions make it the ideal instrument for maintenance and repair electricians and technicians.
Primary uses include testing power apparatus such as cables, motors, panel boards, switch gears, meters, relays and control circuits. Other applications include testing traffic control equipment, telephone and telegraph equipment, aircraft and airport equipment and wiring, railroad signalling equipment and lighting circuits. The MG 251 comes complete with carrying case, test leads, 4 test clips, 2 test probes, 6 AA batteries and spare fuse. |
| | SPECIFICATIONS
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Insulation Tests |
| Test Voltages |
switch selected, 250,500 and 1000 volts DC. |
| Two Insulation Ranges |
autoranging, 0.1-199.99/1999MΩ. Autoranging at 150MΩ nominal. Open circuit or infinity displayed as overranging. "1'' |
| Accuracy |
±2% of reading, ±1 digit up to 2000MΩ. ±3% of reading, ±1 digit from 200MΩ up to 1000MΩ. ±5% of reading,m ±1 digit from 1000MΩ up to 1500MΩ. ±10% of reading, ±1 digit from 1500MΩ up to 2000MΩ |
| Regulation Of Test Voltage |
250V ±10% with 5MΩ or greater load. 1000V ±10%with 20MΩ or greater load |
| Short Circuit Current |
0.08 ma nominal at all test voltages |
| Discharging Time |
0.5 seconds nominal. Instrument automatically discharges item under test when test voltage is turned off |
| Low Resistance (Continually) |
| Measurements |
| Two Ranges |
autoranging 0.01-19.99/199.9 Ω. Autoranging at 15 Ω nominal |
| Accuracy |
±1% of reading, ±1 digit plus test lead resistance. |
| AC Voltage Measurements |
| Two Ranges |
autoranging 0.1-199.9/600 volts. Autoranging at 150 volts nominal |
| Accuracy |
±1% of full scale (200V) up to 200 volts or ±15% of full scale (600V) above 200 volts |
| Input Impedance |
9MΩ |
| DC Voltage Measurements |
| Two Range |
autoranging 0.01-19.99/199.9 volts |
| autoranging at 15 volts nominal |
| Accuracy |
±1% of reading, ±1 digit for measurements above 1 volt |
| Input Impedance |
1.8MΩ nominal |
| CAT NO. |
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MODEL |
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DEscRIPTION |
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AVAIL |
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PRICE |
| MV107101 |
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DMH-251 |
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MULTI-FUNCTION DIGITAL MEGOHMMETER |
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Yes |
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1,630,800 | | |
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