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5

EXAMPLE: Press ACV to select volts ac function. 

z

  Press a combination of buttons, one after the other. 

EXAMPLE: Press ACV to select volts ac function, and then press REL to select the decibels 
modifier.  

For more details on the uses of each button, refer to Section 3, “OPERATION THE METER FROM 
THE FRONT PANEL.” 

SELECTING A MEASUREMENT RANGE   

             

Measurement ranges can be selected automatically by the meter in “autorange” or manually by the 

user. In the autorange mode, the meter selects the appropriate range for the measurement reading. 

To manually select a range, press AUTO to toggle in (and out) of the manual ranging mode, or press         
or     . In the manual range mode, press     or      to up range or down range to the desired 
range. For more details on ranging, refer to “RANGING” in Section 3. 

TAKING SOME BASIC MEASUREMENTS   

WARNING 

READ “MULTIMETER SAFETY” BEFORE OPERATING THIS METER. 

  The following procedures describe the basics of taking common measurements from the front panel. 

These procedures are provided for the user who needs to get started quickly, but dose not want to 
read the rest of the manual at this time. However, in order to take full advantage of your meter, you 
should read the remainder of this manual carefully and completely. 

 

WARNING 

TO AVOID ELECTRICAL SHOCK OR DAMAGE TO THE METER, DO NOT APPLY MORE THAN 

1000V (PEAK) BETWEEN ANY TERMINAL AND EARTH GROUND. THE METER IS PROTECTED 

AGAINST OVERLOADS UP TO THE LIMITS SHOWN IN TABLE 3-1. EXCEEDING THESE LIMITS 

POSES A HAZARD TO THE METER AND OPERATOR. 

Measuring Voltage, Resistance, or Frequency 

 

To measure voltage, resistance, or frequency, press the desired function button and connect the test 
leads as shown in Figure 2-4. The meter will select the appropriate range in the autorange mode. 

Measuring Current 

 

To measure current, insert the red test lead in the                    mA 
input terminal for currents up to 330mA or in the 10A input 
terminal for higher current, and insert the black test lead in the 
COM terminal. 
Connect the test leads as shown in Figure 2-5. 

                                                                       

 
 
 

NOTE 

After measuring high current using the 10A input, thermal 

voltages are generated that may create errors when making 

low-level dc measurements of volts, current, or ohms. To make 

the most accurate measurements, allow up to ten minutes for the 

thermals to settle out. 

 

 

Figure2-5. Measuring Current

 

Diode/Continuity Testing   

The continuity test determines whether a circuit is intact (i.e., has a 
resistance less than about 150

). To perform a continuity test, press          , 

and connect the test leads as shown in Figure 2-6. The beeper emits a 

MAX

750V

1000V

10A FUSED

250V

ALL INPUTS

1KV MAX

FAST FUSE

500mA

mA

TEST

CI RCUI T

+

-

Figure 2-6. Continuity Testing

MAX

750V

1000V

10A FUSED

250V

ALL INPUTS

1KV MAX

FAST FUSE

500mA

mA

DC Voltage,Pesistance
or AC Voltage

Figure 2-4. Measuring DC Voltage, Resistance, AC Voltage

MAX

750V

1000V

10A FUSED

250V

ALL INPUTS

1KV MAX

FAST FUSE

500mA

mA

CURRENT

SOURCE

mA

A

Summary of Contents for 8145B

Page 1: ...ion of operation or handing you will be billed for the repair and the repaired product will be returned to you transportation prepaid SHIPPING TO MANUFACTURER FOR REPAIR OR ADJUSTMENT All shipment of...

Page 2: ...manual has been organized to assist you in getting started quickly It is not necessary for you to read the entire manual before using the meter effectively However we recommend that you do so in orde...

Page 3: ...meter in the circuit z Check meter fuses before measuring transformer secondary or motor winding current See Section 4 MAINTENANCE An open fuse may allow high voltage build up which is potentially ha...

Page 4: ...tests check RAM ROM A D and the display The meter has passed all tests and is ready for normal operation if an error code is not displayed After the meter completes the power up sequence it assumes th...

Page 5: ...GROUND THE METER IS PROTECTED AGAINST OVERLOADS UP TO THE LIMITS SHOWN IN TABLE 3 1 EXCEEDING THESE LIMITS POSES A HAZARD TO THE METER AND OPERATOR Measuring Voltage Resistance or Frequency To measure...

Page 6: ...ibels are always displayed in a single fixed range with 0 01 dB resolution Press the AUTO toggle in and out autorange you can also press the and change range manually A voltage measurement is converte...

Page 7: ...000V peak on all ranges mA and mA mA and COM 500mA dc or ac rms A and A 10A and COM 10A dc or ac rms V and COM 250V dc or ac rms on all ranges V and COM 250V dc or ac rms on all ranges All Functions A...

Page 8: ...00Hz 330 00 Hz 30MHz range have not full scale 3KHz 3 3000 KHz 30KHz 33 000 KHz 300KHz 330 00 KHz 3MHz 3 3000 MHz 30MHz ANGING AUTO Ranging operations are performed using the AUTO and buttons see Figu...

Page 9: ...If the input signal is below the required level the frequency will be displayed as zero If the measurements are unstable the input signal may be near the threshold level SELECT A FUNCTION MODIFIER REL...

Page 10: ...taken The measurement reading displayed on the secondary display To exit the MN MX AVG modifier press and hold down the MN MX button for two seconds or press other function buttons Selecting the MN M...

Page 11: ...USB cable to the communication connector on the real panel plug the other end of the cable to the USB port of the computer running the devote DMMVIEW_8145B software set the corresponding connector po...

Page 12: ...ONS annunciator is showed on the primary display the Reference Impedance is showed on the secondary display Then press or to select the needed value supplied value are 50 75 93 100 150 300 500 600 800...

Page 13: ...is good the meter will read between 1 to 19 If the fuse is blown the meter will read 10M to OL 3 Remove the test lead probe from the mA input terminal and insert it into the 10A input terminal If the...

Page 14: ...r Current dc function and 300mA range on the meter and the input level from the 5520A The display should meet the request listed in Section 6 3 Connect a test lead from the output 20A HI and LO connec...

Page 15: ...VIRONMENT STATION z Temperature 23 2 z Relative humidity 70 RH z Power varied at 5 of rated voltage z Frequency of power rated value 1Hz z Warmup 2 hours for standard equipment 1 hour for measured met...

Page 16: ...ine connection right or not newly 6 Press the button to change range in calibration mode the meter is in manual range 7 Set the standard equipment to the required output 8 Repeat step 4 to 7 until com...

Page 17: ...quency of the applied signal should be 1KHz 8 Applied the standard equipment 300mV 1KHz to the meter 9 Keep the meter at least 20 seconds press the REL button to save the calibrated value and the SAVE...

Page 18: ...d equipment in the STBY state Connect the standard equipment with the meter as shown in Figure 5 3 referred before 10 Applied the standard equipment 3A 1KHz to the meter 11 Keep the meter at least 20...

Page 19: ...ve the line connected with the AUX terminal of the standard equipment 8 Repeat step 5 to step 7 until complete all range SECTION 6 Specifications INTRODUCTION This Section contains the specifications...

Page 20: ...50Hz or 60Hz 1K unbalanced resistance Maximum Input 750V rms 1000V peak DC CURRENT Range Resolution Accuracy Input Impedance 300 mA 10uA 0 1 3 1 10A 1 mA 1 5 3 0 01 Maximum Input 300mA Protected with...

Page 21: ...t Voltage 2V Test Current Approximate 1mA when measuring forward bias junction Continuous Resistance 150 FREQUENCY Range Resolution Accuracy 300Hz 0 01 Hz 0 05 2 3KHz 0 1 Hz 30KHz 1 Hz 300KHz 10 Hz 3M...

Page 22: ...ttention to Use of Operation Instruction z The present operation instruction is subject to change without notice z The content of the operation instruction is regarded as correct Whenever any user fin...

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