AA [AMPROBE. (umm, | A United Dominion Company 630 Merrick Road, Lynbrook, NY 11563 Telephone: (516) 593-5600 Fax: (516) 593-5682 Technical Support: (800) 477-8658 (VOLT) Web: hitp://www.amprobe.com Email: info@amprobe.com Printed in Korea PIN 947781 8/99 OPERATING INSTRUCTIONS for AMPROBE INSULATION RESISTANCE TESTER . ee las 121 2 ee ed Model AMB-3 AA |AMPROBE. fammm | A United Dominion CompanyTABLE OF CONTENTS LIMITED WARRANTY LIMITED WARRANTY 3 Congratulations! You are now the owner of an AMPROBE Instrument. It has been quality SAFETY INFORMATION 4 crafted according to the highest standards of quality and workmanship. This instrument has been inspected for proper operation of all its functions and tested by qualified factory INTRODUCTION . 5 technicians according to the long-established standards of AMPROBE. REFERENCE DESIGNATION a 6 Your AMPROBE instrument has a limited warranty against defective materials and/or workmanship for one year from the date of purchase provided that the seal is unbroken or, HOW TO USE YOUR AMB-3 o.oo... ccccsscsssssssscssssessssssescssussersesegnscarsesssesssssecens a7 . in the opinion of the factory, the instrument has not been tampered with or taken apart. BATTERY REPLACEMENT 8 Should your instrument fail due to defective materials, and/or workmanship during the one year warranty period, return it along with a copy of your dated bill of sale PRECAUTIONS FOR USE 8 which must Identify instrument by model number and manufacturing number. SPECIFICATIONS 10 IMPORTANT: For your protection, please use the instrument as soon as possible. if dam- NOTES 1 aged, or should the need arise to return your instrument, place it in a shipping carton packed with sufficient packing material. It must be securely wrapped. Amprobe is not responsible for damage in transit. Be sure to include a packing slip (indicating model and manufacturer number) along with a brief description of the problem. Make certain your name and address appears on the box as well as the packing slip. Ship prepaid via Air Parcel Post insured or U.P.S. (where available) to: Service Division AMPROBE 630 Merrick Road (For U.P.S.) P.O. Box 329 (For Parcel Post) f Lynbrook, NY 11563-0329 Outside the U.S.A. the local Amprobe representative will assist you. Above limited war- : ranty covers repair and replacement of instrument only and no other obligation is stated or implied.SAFETY INFORMATION Z\WARNING.- To ensure thal the meter is used safely, follow all safety and operating instructions. 1. Never use tester on high power or high voltage circuits. 2. Pay attention when measuring any voltage of AC 30Vrms (42.4V Peak) or DC 60V or more to avoid injury. 3. Disconnect power source of the measured circuit before measuring insulation resis- tance. 4. High voltage is generated while measuring insulation resistance. Be careful of pos- sible electric shock. 5. After measuring insulation resistance, be sure to discharge any high voltage charge. 6. Never apply an input signal exceeding the maximum input rated value 7. Never use tester for measuring line connected equipment (i.e. motors) that could generate induced or surged voltage that may exceed the maximum allowable voltage. 8 Never use tester if the tester or test leads are damaged or broken. 9. Never use an uncased tester. 10. Always keep your fingers behind the finger guards on the probe when making mea- surements. ( 41. Be sure to disconnect the test probe from the circuit when changing the function. 12. Never use tester with wet hands or in a damp environment 43. Never use test leads other than the recommended test leads. 14. Never open tester case except when replacing batteries. Do not attempt any alter- ations of origina! specifications. 15. To ensure safety and maintain accuracy calibrate and check the tester atleast once a year. INTRODUCTION Thank you for purchasing the AMB-3 insulation resistance tester. This is a small, easy to operate insulation resistance tester. It has a regulated type DC-DC converter. This en- ables the user to read quickly the insulation resistance value of various electric equipment and lines. 1. Asmaill, lightweight and easy to use instrument 2. Utilizes a core-magnet type meter which is stable and accurate 3. Itis economical to use since only 4 AA Alkaline batteries are required to operate the tester. . 4. Built-in ACV range can measure AC line voltage. 5 The measuring switch can be locked on for extended measurements. 6. Itincorporates an LED lamp indicating the high voltage power source (500V) is on. The user now knows whether or not any test voltage exists at the output terminals. It also reminds the user to turn off the switch when it is locked on./ REFERENCE DESIGNATION HOW TO USE YOUR AMB-3 1. CONNECTION OF TEST LEADS Connect the red test lead to the L terminal of the instrument and the biack test lead to the E terminal of the instrument. 2. ADJUSTMENT OF METER POINTER TO INFINITY (cc) SCALE } Confirm alignment of the pointer to the infinity line mark (ieft most marking of the MQ scale). Turn the e position screw head to align the pointer with the infinity line. - 2 3. MEASUREMENT OF INSULATION RESISTANCE : a. Connect the red and biack test feads to the item under test. Note if test is referred to te yAN AMPROBE, , ground, connect the black test lead to ground and red test lead to circuit being tested. * eleacmemaiae 5. en b. Rotate the function switch from POWER OFF position to MN position and push the Hi POWER switch. The meter indicates the insulation resistance value. c. If the LED lamp is ON, the tester is working properly and the voltage is correctly impressed on the test point. If the LED lamp doesn't light, the batteries must be re- placed. d. Set the rotary switch to MQ POWER LOCK position for continuous measurements. POWER switch remains ON regardless of Push Button switch (The LED lamp stays ON). e. Return the control switch to POWER OFF position after measurement. 3 4. CHECK BATTERIES Rotate the control switch to BATT CHECK position with the E and t terminals NOT connected to anything. If the pointer swings to the BATT scale, the batteries are OK. If the pointer points to the left side of the BATT scale, the batteries are low. Replace them with new batteries. For replacement of the batteries refer to page 8. . . 5. ACV MEASUREMENT 1. Scales: 5. Insulation resistance test a. Connect the test leads to the AMB-3. a. MQ scale push button switch . t b Rotate the function selector switch to the ACV (Power Off) position. . Batley check scale function selector switch j c. Connect the leads to the circuit and read the voltage value in the red 0~600V scale. 2. Pointer ~ 8. L Terminal (Line side) d. This ACV range can be used for general ACV measurements and asa preliminary 3. LED HV -ON' indicator 9. E Terminal (Earth side) check for whether or not ACV is present on the measured object, prior to insulation 4, Position pointer adjustment resistance measurement (Note: If voltage is present DO NOT proceed with test. Remove voltage before proceeding). PRECAUTION - Be sure to return the function selector switch to the Power Off position after use. With the function selegtor switch in this position, current doesn't flow and the batteries will last longer. 6 7et A a BA UN CREO A lS When replacing the batteries follow these steps: . . . P 9 P 1. If testis to determine if there is resistance to ground, connect the black (earth) test Loosen the screw on the rear case tead to this ground. For general measurements use either polarity of test leads. Remove the case. Remove the old batteries. Insert new batteries with the right polarity. 2. ff testing is not going to be done for a tong period of time, remove the four batteries 3. Don't store the tester in a high temperature and humidity area. 4. Avoid mechanical shock or vibration to the tester. 5. Don'trub cover with a dry cloth. This could weaken or remove the antistatic coating on its cover. Should the antistatic coating on the cover be removed, a clean cloth moist- ened with an antistatic cleaner should be used to clean the cover. aa z ri tei a. _ DHE 8050 Back of AMB-3 with cover off*Power source: Four 1.5V AA batteries *Accuracy: Within +5% of the value indicated in the primary effective scale range. Other: within 2% of the scale length *ACV: Within 5% of full scale value * Size and Weight: 5.85" x 9.9" x 1.8", .77\bs. - Accessories supplied: 1 Test lead with probe, 1 Test lead with clip, carrying case. * Terminal to terminal voltage: +10% of rated voltage.....at oo (Open circuit) About 90% of rated voltage.....at_ Center scale (approx. 20 Mfonms) 10 11