Associated Research Incorporated 414AAI Indicateur de niveau
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FEATURES OF MODELS 404AI 411AI 412AI 414AI, 422AI 411AAI, 412AAI 414AAI 422AAI 1. Wide, easily read 4-1/2 inch AC kilovoltmeter with 2% of full scale accuracy. 2. Detachable 5 foot return (ground) lead. This lead is always used in performing tests and is grounded for safety. 3. Detachable 5 foot high voltage lead with flexible silicone rubber insulation for easy handling and user safety. Control panel jacks are well recessed for safety. 4. Lighted rocker switch on the control panel which indicates "power on" and that the High Voltage circuit is energized. 5. Lighted leakage indicator. If excessive current is drawn during the Hipot test, the yellow leakage indicator will illuminate and an audio alarm will sound. To reset the unit, simply decrease the output voltage to zero, place the power switch into the H0ff" position and remove whatever is causing the failure from the output leads. 6. The breakdown indicator is responsive to a broad band of RF frequencies such as those generated when breakdown or arcing across insulation takes place. Since this light is only sensitive to RF currents, it will not normally indicate when the equipment under test is short circuited or when high leakage currents are present, but will indicate any time there is actual sparking, arcing or corona. On the other hand, since arcing is normally associated with relatively high currents, the leakage light will usually indicate simultaneously with the breakdown light. If the output voltage of the HYPOT® JUNIOR is raised to a high value and then the connection is made to the equipment under test, the breakdown light will sometimes flicker. This does not necessarily indicate an actual breakdown, but usually is due to the fact that as the hot lead is brought to the equipment, there is a point reached where the air gap separating the test lead from the equipment is decreased sufficiently to permit current flow by arcing through the air. Once physical contact is established, the arcing ceases (assuming no breakdown of the equipment). This arcing is therefore normal to the establishing of the circuit, and does not in itself indicate any breakdown in insulation. 7. Voltage adjust knob. This control varies the high voltage from near zero to the full AC voltage. The voltage can be adjusted only when the high voltage circuit is energized. It is recommended that the voltage control be returned to zero at the end of each test. WARNING: Since the high voltage circuit of all these models is energized whenever the unit is turned on, it is possible that as much as the full output voltage will be present at the output terminals if the voltage control is not at its extreme counter-clockwise position. 8. Detachable 7-1/2 foot power cord with standard connector. 9. Line fuse accessible from the rear. ’’Shock safe" fuseholder. 10. Current Trip (sensitivity) adjustments accessible through the back panel. The current at which the failure alarm will trip is adjustable from approximately .3mA to 5mA AC. Turn the controls counter-clockwise to decrease the current setting and increase sensitivity. Turn it clockwise to increase the current setting and decrease the sensitivity.
Service et Manuel de l'utilisateur
837.55 Kbytes (857651 Bytes)
01 January 1987
Document scanné, la lecture en partie mal, en partie illisible.
21 October 2017
SECTION I OPERATORS MANUAL INTRODUCTION ... 3 SAFETY PRECAUTIONS REQUIRED FOR HIGH VOLTAGE TESTING . . 4 WHY PERFORM DIELECTRIC WITHSTAND TESTS? ... 7 TYPICAL APPLICATIONS ... 8 TESTING CAPABILITIES . ... 10 FEATURES OF MODELS 4 04AI, 411AI 412AI 414AI 42 2AI, 411AAI, 412AAI 414AAI 422AAI ... 12 400AI SERIES HYPOT®JR. OPERATING INSTRUCTIONS ... 13 CURRENT TRIP (SENSITIVITY) ADJUSTMENT ... 15 SPECIFICATIONS ... 16 SECTION II REPLACEMENT PARTS LIST SECTION III CALIBRATION PROCEDURE SECTION IV SCHEMATIC This manual discusses the reasons why dielectric withstand tests are required, the precautions necessary to ensure that tests are done safely, and how such tests are accomplished on various classes of materials, components and products. In later chapters, the features of Associated Research 40OAI series Hypots® Jr. are explained, along with a step by step guide to its proper use. Finally, technical data on all models is presented.
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