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2

Section 1 

Introduction 

INTRODUCING THE DUAL DISPLAY MULTIMETER 

 

In this manual, “WARNING” is reserved for conditions and actions that pose hazard(s) to the user; 
“CAUTION” is reserved for conditions and actions that may damage your meter. 

NOTE 

This manual contains information and warnings that must be followed to ensure safe operation and 

retain the meter in safe condition. 

     WARNING 

 

READ THE “MULTIMETER SAFETY” SHEET BEFORE USING THE METER. 

 

The Dual Display Multimeter is a 5-digit high resolution mode. The meter is designed for bench-top. 
The features provided by the meter are: 

z

  A dual, Liquid Crystal, Display that allows two properties of an input signal to be displayed at the 

same time 

z

 True 

rms 

AC. 

z

  30 MHz in frequency measurement 

z

  10µV sensitivity in volts DC 

z

  Decibels with variable reference impedance measurement capability. 

z

  A compare mode to determine if a measurement is within, above, or below a designated range. 

z

  Slow and Fast selectable count resolution, with reading speeds of 3 and 6 reading per second, 

respectively. 

z

  Built-in self-tests with closed-case calibration (no internal calibration adjustment). 

z

  Isolation of Universal Serial Bus(USB) Port 

z

  Remote Control, display, record, Data Analysis, print with computer. 

WHERE TO GO FROM HERE 

This 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 
order to use your meter to its full advantage. 
Begin by scanning the Table of Contents to familiarize yourself with the organization of the manual. 
Then, read Section 2, “GETTING STARTED”. Refer to the appropriate section of the manual as 
needed. The contents of each section are summarized below. 
SECTION 1. INTRODUCTION 
Introduces the Dual Display Multimeter, describing its features and users manual. 
SECTION 2. GETTING STARTED 
Explains how to prepare the meter for operation and get started quickly taking basic measurements 
from the front panel. 
SECTION 3. OPERATING THE METER FROM THE FRONT PANEL 
Provides a complete description of each operation that can be performed using the pushbuttons on 
the front panel. Section 3 is organized so that related operations and functions are grouped together. 
SECTION 4. MAINTENANCE 
Describes how to perform basic maintenance and how to replacing fuses as order 
SECTION 5. CALIBRATION 
Introduces the required equipment, ambient environment station for calibration and the process of 
calibration. 
SECTION 6. SPECIFICATIONS   

MULTIMETER SAFETY 

The Dual Display Multimeter has been designed and tested according to IEC Publication 1010 Safety 
Requirements for Electronic Measuring Apparatus. This manual contains information and warnings 

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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