Transcript
TEST EQUIPMENT TRUE RMS DIGITAL MULTIMETER I
72-410A
OPERATION MANUAL
CONTENTS TITLES
PAGES
1. ~Ft()I>lJ<:1rI()~ ----------------------------------------------------------------------- 3 2. SAFE1rY INF()FtMA1rI()N 2-1. Warning and <:aution ---------------------------------------------------------------- 4 2-2. International electrical symbols ---------------------------------------------------- 4 2-3. Injput terminals ----------------------------------------------------------------------- 4 2-4. Line voltage selection and fuse ratings ------------------------------------------- 5 3. SPE<:IFI<:A1rI()~S 3-1. General sjpecification -----------------------------------------------------------------7 3-2. Injput terminals and limits -----------------------------------------------------------8 3-3. 1rruerms. -------------------------------------------------------------------------------8 4. ()PEFtA1rmG mS1rFtlJ<:1rI()~S 4-1. Zero adjustment -----------------------------------------------------------------------9 4-2. Injput overload jprotection ------------------------------------------------------------9 4-3. <:hanging injput jpower configuration ---------------------------------------------10 4-4. Power switch -------------------------------------------------------------------------10 4-5. Measuring voltage -------------------------------------------------------------------10 4-6. Measuring current--------------------------------------------------------------------11 4-7. Measuring resistance ---------------------------------------------------------------14 4-8. Measuring frequency ---------------------------------------------------------------15 4-9. lrransister hFE test ------------------------------------------------------------------16 4-10. I>iode test -----,..---------------------------------------------------------------------16 4-11. <:ontinuity test ----------------------------------------------------------------------17 4-12. Hold function -----------------------------------------------------------------------17 4-13. Handle -------------------------------------------------------------------------------17
5. RESOLUTION AND ACCURACY -----------------------:.--------------------------18 6. MAINTENANCE 6-1. Introduction --------------------------------------------------------------------------19 6-2. Fuse replacement --------------------------------------------------------------------19 7. ACCESSORIES -------------------------------------------------------------------------19 8. MEMO ------------------------------------------------------------------------------------2()
1. INTRODUCTION
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FIG 1-1
o Your rEZD model 72-410A is a portable, bench type o o
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digitalmultimeter with a 4+ digit light-emitting diode(LED). The 72-410A can make hFE measurements, diode measurements,frequency measurements and continuity measurements in addition to the usual DMM measurement - AC/DC volts, AC/DC current and resistance. TRUE RMS MEASUREMENT OF AC SIGNALS: TRUE RMS measurement is the only accurate way to directly measure ac sigals that are not noise-free pure sine waves. The 72-410A measures ac voltage frequencies up to 50KHz. SAFEY AND EMC : Approval at TUV This meter has been designed and tested in accordance with safety and EMC. - SAFETY: EN6101O-1 Approval at TDv - EMC REGULATIONS: EN50081-1, EN55022, class B EN50082-1, IEC801-2,3,4 - overvoltage cat. II - pollution deg. II
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2. SAFETY INFORMATION
WARNING READ nMULTIMETER SAFETY" BEFORE USING THIS METER. This meter has been designed and tested in accordance with IEC publication. To ensure that the meter is used safety, follow all safety and operating instructions in this manual. If the meter is not used as described in this manual the safety features of the meter might be impaired.
2-1. "WARNING" and "CAUTION" ; "WARNING" is used for conditions and actions that, pose hazards to the user, the word "CAUTION" is used for conditions and actions that may damage your meter
2-2. INTERNATIONAL ELECTRICAL SYMBOLS
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.-L
DANGEROUS VOLTAGE AC-ALTERNATING CURRENT DC-DIRECT CURRENT
& ICJI
GROUND IMPORTANT SAFETY INFORMATION IN MANUAL DOUBLE INSULATION
TABLE 2-1.
2-3. INPUT TERMINALS ,To take a measurement, correctly connect the test lead with the prober input terminals. As indicated (positive / negative) the red color of input terminal allow you to have easy operation. See FIG 2-1.
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CD lOA
Amperes Input Terminal For current measurements(AC or DC) up to lOA continuous when the function selector switch is in the lOA position.
®COM
Common Tertninal(Ground) Return terminal for all measurements. Do not apply more than IOOOV between the (com) terminal and earth ground.(Black color)
@VQHz Volts, Ohms, Continuity, Frequency, Diode .'1» test input terminal (Red color)
"*
@rnA
rnA input Terminal.
@Socket Transistor hFE input Terminal
WARNING TO AVOID ELECTRICAL SHOCK OR DAMAGE TO THE METER. DO NOT APPLY MORE THAN 1000V BETWEEN COM TERMINAL AND EARTH GROUND. TO AVOID ELECTRICAL SHOCK. USE CAUTION WHEN WORKING ABOVE 60VDC OR 30VAC RMS, SUCH VOLTAGES POSE A SHOCK HAZARD.
2-4. LINE VOLTAGE SELECTION AND FUSE RATINGS. VOLTAGE
FUSE
POWER MAX
I03V -126V(50Hz/60Hz)
F O.5A 250V
lOW
206V - 252V(50Hz/60Hz)
F O.25A 250V
lOW
TABLE 2-2.
o Select the proper function and range for your measurements. o Disconnect the live test lead before disconnecting the common test lead.
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o Do not use the meter if the meter or test lead look o o
damaged,or if you suspect that the meter is not operating properly; Tum off power to the circuit under test before cutting, unsoldering or breaking the circuit. Small amounts of current can be dangerous. When using the probes, keep your finger behind the the fmger guards on the probes.
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FIG 2-1. 72-410A FRONT VIEW (J)
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VOLTS DCIhFE VOLTSAC AMPERES DC AMPERESAC
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@ FREQ ®
