background image

 

7

to desired range 

z

  Turn on or turn off the back light (when arrive the setting time the back light can automatically off) 

z

  Power-on or off the power supply (POWER) 

These operations are described in remainder of Section 3. 

DISPLAY 

The meter has a 5-digit, Liquid Crystal Display (Primary Display) and a 4-digit, Liquid Crystal Display 
(Secondary Display). The display shows measurement readings, measurement units and messages. 
As shown in Figure 3-1. 
 
 
 
 
 
 
 
 
 
 

 

INPUT TERMINALS 

 

The input terminals, as shown in Figure 3-2, are located 
on the right of the front panel 
The meter is protected against overloads up to the 
limits shown in Table 3-1. Exceeding these limits poses 
a hazard to both the meter and operator. 

Figure 3-2. Input Terminals

 

Table 3-1. Input Limits 

FUNCTION INPUT 

TERMINALS 

MAXIMUM 

INPUT 

V      

V

    and COM 

1000V dc on all ranges 

~,

 FREQ and dBm 

V

      and COM 

750V ac rms,1000V peak on all ranges 

mA    and mA 

~

 

mA and COM 

500mA dc or ac rms 

~

 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 

Any terminal to earth 

1000V dc or ac peak 

SELECTING A MEASUREMENT FUNCTION 

Press a function button, as shown in Figure 3-3, to select a measurement function. When you select 
a function, annunciators turn on to indicate the function selected. Rang and full scale values are 
summarized in Table 3-2 for voltage, current, ohms and frequency

 

Reading Rate

High Voltage

Relative Modifier

Primary Display

Diode Test

Continuity Test Save

Function and Unit

Annunciators

Secondary Display

Time

Hold

MIN MAX
Modifier

Autorange

Calibration state

Figure 3-1. Display Annunciators

MAX

750V

1000V

10A FUSED

250V

ALL INPUTS

1KV MAX

FAST FUSE

500mA

mA

Volts, Ohms, Diode Test input Terminal

Common Terminal. Retern Terminal 
for all Measurements

Amperes Input Terminal. For 
Current Measurements up to 10A 
continuous

Milliamperes Input Terminal. 
For Current Measurements
up to 500mA

Содержание 8145B

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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