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 10

 
 
 
 

For example, if the relative base is 15.000V, and the present reading is 14.100V, the display will show 
-6%. Press REL again to exit the relative modifier. 

NOTE 

The relative modifier cannot be selected if the display shows “OL” or is blank. (The display would be 

blank, for example, because of range changes.) 

 

Selecting the relative modifier (REL) turns off autoranging and locks in the present range. Make sure 
you are in the correct range before selecting the relative modifier. If you press other buttons after the 
relative modifier has been selected, you will automatically exit REL.   

HOLD (Touch Hold) Modifier 

 

The Touch Hold modifier allows you to hold the measurement reading on the display. 

 

Press HOLD to select the Touch Hold modifier. When Touch Hold is selected, “HOLD” annunciator is 
lit on, and the beeper emits a single beep. Press HOLD again to exit Touch Hold modifier, and the 
beeper emits a single beep.   

MN MX AVG (Minimum Maximum Average) Modifier 

 

The MN MX modifier causes the meter to store the minimum and maximum inputs measured since the 
MN MX AVG modifier was selected. Press MN MX to select the MN MX AVG modifier. When the MN 
MX AVG modifier is first selected, the minimum, maximum and average values are set to the displayed 
reading and the “MAX” annunciator lights, once the maximum value showed on the primary display, 
the beeper emits a single beep. Press MN MX again to display the minimum reading and the “MIN” 
annunciator lights, once the minimum value showed on the primary display, the beeper emits a single 
beep. Press MN MX again to display the average reading on the primary display (“AVG” annunciator 
lights). Each subsequent press the MN MX button toggles among the minimum, maximum and 
average measurements 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 MX AVG modifier turns off autoranging and locks in the present range. Make sure 
you are in the correct range before selecting the MN MX AVG modifier. 

COMP (Compare) Modifier 

 

The compare function (COMP) provides an easy way to determine if a reading falls within a 
designated range of values. In the compare mode, the meter displays a reading in the secondary 
display and indicates in the primary display if that value is lower (CO-LO) than, higher (CO-HI) than, or 
within a range (PASS) you selected, if the reading lower or higher, the beeper emits a continuous tone. 
Compare Modifier can be used under dc voltage, ac voltage, dc current, ac current and omh function, 
in compare mode, the meter is in manually range mode.. 

 

Following the step to enter Compare Modifier 

z

  Select a function and a range 

z

  Press COMP to toggle in Compare Modifier 

z

  Before selecting the compare function, set the high and low compare point first, when compare 

modifier selected, “MAX” annunciator lights, and the leftmost digit on the primary display is 
flashing, then can set the high point, press AUTO to select the digit to be set, each press AUTO 
causes the digit to the right to be selected and flashing, press     or      to    up or down 
the flashing digit. Press the COMP again, “MIN” annunciator lights, and the leftmost digit on the 
primary display is flashing, then can set the low point, press AUTO to select the digit to be set, 
each press AUTO causes the digit to the right to be selected and flashing, press          or          to 
up or down the flashing digit. Each subsequent press the COMP button toggles between high 
set, low set and compare measurements taken. To exit the Compare Modifier, press and hold 
down the COMP button for two seconds or press other function buttons. 

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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