Vichy VC8145A User manual

DUAL DISPLAY MULTIMETER
USER’S MANUAL
CAUTION
THIS IS AN IEC SAFETY CLASS 1 PRODUCT. THE GROUND WIRE IN THE LINE CORD MUST BE
CONNECTED FOR SAFETY.
WARRANTY
Our compa y warra ts to the origi al purchaser that each product it ma ufactures will be free from defects i
material a d workma ship u der ormal use a d service for a period of o e year from date of purchase. Our
compa y’s warra ty does ot apply to fuses, test leads or a y product which, i our compa y’s opi io , has bee
misused, altered, or damaged by accide t or ab ormal co ditio s of operatio or ha dli g.
To obtai warra ty service, co tact the earest Service Ce ter or se d the product, with a descriptio of the
difficulty, a d postage prepaid, to the earest Service Ce ter. We assume o risk for the damage i tra sit. We will,
at its optio , repair or replace the defective product free of charge or refu d your purchase price. However, if we
determi e that the failure was caused by misuse, alteratio s, accide t or ab ormal co ditio of operatio or
ha di g, you will be billed for the repair a d the repaired product will be retur ed to you tra sportatio prepaid.
SHIPPING TO MANUFACTURER FOR REPAIR OR ADJUSTMENT
All shipme t of our compa y’s i strume ts should be made via U ited Parcel Service or “Best Way” prepaid. The
i strume t should be shipped i the origi al carto ; or if it is ot available, use a y suitable co tai er that is rigid
a d of adequate size. If a substitute co tai er is used, the i strume t should be wrapped i paper a d surrou ded
with at least four i ches of excelsior or similar shock-absorbi g material.
CLAIM FOR DAMAGE IN SHIPMENT TO ORIGINAL PURCHASER
The i strume t should be thoroughly i spected immediately upo origi al delivery to purchaser. All material i the
co tai er should be checked agai st the e closed packi g list. The ma ufacturer will ot be respo sible for
shortages agai st the packi g sheet u less otified immediately. If the i strume t is damaged i a y way, a claim
should be filed with the carrier immediately. (To obtai a quotatio to repair shipme t damage, co tact the earest
Service Ce ter.) Fi al claim a d egotiatio s with the carrier must be completed by the customer.
1

Section 1
Introduction
INTRODUCING THE DUAL DISPLAY MULTIMETER
I this ma ual, “WARNING” is reserved for co ditio s a d actio s that pose hazard(s) to the user;
“CAUTION” is reserved for co ditio s a d actio s 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 resolutio mode. The meter is desig ed for be ch-top.
The features provided by the meter are:
A dual, Liquid Crystal, Display that allows two properties of a i put sig al to be displayed at
the same time
True rms AC.
30 MHz i freque cy measureme t
10µV se sitivity i volts DC
Decibels with variable refere ce impeda ce measureme t capability.
A compare mode to determi e if a measureme t is withi , above, or below a desig ated ra ge.
Slow a d Fast selectable cou t resolutio , with readi g speeds of 3 a d 6 readi g per seco d,
respectively.
Built-i self-tests with closed-case calibratio ( o i ter al calibratio adjustme t).
Isolatio of U iversal Serial Bus(USB) Port
Remote Co trol, display, record, Data A alysis, pri t with computer.
WHERE TO GO FROM HERE
This ma ual has bee orga ized to assist you i getti g started quickly. It is ot ecessary for you to
read the e tire ma ual before usi g the meter effectively. However, we recomme d that you do so
i order to use your meter to its full adva tage.
Begi by sca i g the Table of Co te ts to familiarize yourself with the orga izatio of the ma ual.
The , read Sectio 2, “GETTING STARTED”. Refer to the appropriate sectio of the ma ual as
eeded. The co te ts of each sectio are summarized below.
SECTION 1. INTRODUCTION
I troduces the Dual Display Multimeter, describi g its features a d users ma ual.
SECTION 2. GETTING STARTED
Explai s how to prepare the meter for operatio a d get started quickly taki g basic measureme ts
from the fro t pa el.
SECTION 3. OPERATING THE METER FROM THE FRONT PANEL
Provides a complete descriptio of each operatio that ca be performed usi g the pushbutto s o
the fro t pa el. Sectio 3 is orga ized so that related operatio s a d fu ctio s are grouped
together.
SECTION 4. MAINTENANCE
Describes how to perform basic mai te a ce a d how to replaci g fuses as order
SECTION 5. CALIBRATION
I troduces the required equipme t, ambie t e viro me t statio for calibratio a d the process of
calibratio .
SECTION 6. SPECIFICATIONS
MULTIMETER SAFETY
The Dual Display Multimeter has bee desig ed a d tested accordi g to IEC Publicatio 1010
2

Safety Requireme ts for Electro ic Measuri g Apparatus. This ma ual co tai s i formatio a d
war i gs which must be followed to e sure safe operatio a d retai the meter i safe co ditio .
Some commo i ter atio al electrical symbols used i this ma ual are show below.
○OFF(power)
SWITCH POSITION
DANGEROUS
VOLTAGE
ON(power)
SWITCH POSITION
EARTH GROUND
~AC-ALTERNATING
CURRENT
WARNING INFORMATION
DC-DIRECT
CURRENT
Before usi g the meter, read the followi g safety i formatio carefully.
Avoid worki g alo e.
Follow all safety procedures for equipme t bei g tested.
I spect the test leads for damaged i sulatio or exposed metal. Check test lead co ti uity.
Damaged leads should be replaced.
Be sure the meter is i good operati g co ditio .
Select the proper fu ctio for your measureme t.
To avoid electrical shock, display “ ‘ whe worki g above 30V dc or 30V ac RMS.
Disco ect the live test lead (VΩ ) before disco ecti g the commo test lead (COM).
Disco ect the power a d discharge high-voltage capacitors before testi g i Ω, a d .
Whe maki g a curre t measureme t, tur the circuit power off before co ecti g the meter i
the circuit.
Check meter fuses before measuri g tra sformer seco dary or motor wi di g curre t; (See
Sectio 4, “MAINTENANCE”) A ope fuse may allow high voltage build-up, which is pote tially
hazardous.
Section 2
Getting Started
INTRODUCTION
Sectio 2 explai s how to prepare the meter for operatio , discusses ge eral operati g features, a d
walks you through the basics of taki g some commo measureme ts,
GETTING STARTED
Unpacking and Inspecting the Meter
Carefully remove the meter from its shippi g co tai er a d i spect it for possible damage or missi g
items. If the meter is damaged or somethi g is missi g, co tact the place of purchase immediately.
Save the co tai er a d packi g material i case you have to retur the meter.
Front Panel and Rear Panel
The fro t pa el (show i Figure 2-1) has three mai eleme ts: the i put termi als o the right, the
display a d the pushbutto s. The pushbutto s are used to select major fu ctio s, ra gi g
operatio s, a d fu ctio modifiers. These eleme ts are described i detail i Sectio 3.
Figure 2- 1. Fro t Pa el
3
DCV
ACV FREQ
DCA
ACA
AUTO
MN
SHIFT
MX
HOLD
COMP
ON
1
POWER
OFF
0
ALL INPUTS
1KV MAX
FAST FUSE
500mA 250V
mA
10A FUSED
750V
1000V
MAX
RANGE
dBm
REL
RATE
DUAL DIS LAY MULTIMETER
8145B

The rear pa el (show i Figure 2-2) co tai s the power-li e cord co ector, commu icatio
i terface, the Serial Number Label.
Figure 2-2. Rear Pa el
ADJUSTING THE HANDLE
For be ch-top use, the ha dle ca be positio ed to provide differe t viewi g a gles. To adjust its
positio , pull the e ds out to a hard stop a d rotate it to a positio . To remove the ha dle, adjust it to
the vertical stop positio a d pull the e ds all the way out.
POWER
CAUTION
TO AVOID SHOCK HAZARD, CONNECT THE INSTRUMENT POWER CORD TO A POWER
RECEPTACLE WITH EARTH GROUND.
NOTE
Apply the rated voltage and frequency to the meter as marked on the rear panel of the meter.
TURING THE METER ON
To tur the meter o , press the POWER butto located o the lower-left of the fro t pa el. If you
tur the meter off, you must wait five seco ds before tur i g the meter back o . If you do ot, the
meter will ot power-up.
Whe the meter is tur ed o , the full scree displays light while the i strume t performs a i ter al
self-test of its digital circuitry. These tests check RAM, ROM, A/D, a d the display. The meter has
passed all tests a d is ready for ormal operatio if a error code is ot displayed.
After the meter completes the power-up seque ce, it assumes the power-up measureme t
co figuratio stored i o -volatile memory. The power-up co figuratio set at the factory is show
i Table 3-6. (To cha ge the power-up co figuratio , refer to “CHANGING THE POWER-UP
CONFIGURATION” i Sectio 3.)
USING THE PUSHBUTTONS
The pushbutto s o the fro t pa el select meter fu ctio s a d operatio s. A summary of basic
pushbutto operatio s is show i Figure2-3.
Figure 2-3. Summary of Basic Pushbutto Operatio s
Pushbutto s ca be used i two ways. You ca :
Press a si gle butto to select a fu ctio or operatio .
EXAMPLE: Press ACV to select volts ac fu ctio .
Press a combi atio of butto s, o e after the other.
EXAMPLE: Press ACV to select volts ac fu ctio , a d the press REL to select the decibels
modifier.
4
DCV
ACV FREQ
DCA
ACA
AUTO
MN
SHIFT
MX
HOLD
COMP
ON
1
POWER
OFF
0
RANGE
dBm
REL
RATE
FUNCTION BUTTONS
FUNCTION MODIFIER BUTTONS
RANGE BUTTONS
BACK LIGHT
Press i to Power-up
Press to Step Through
Measureme t Rate(Slow,Fast)
Press to Select a Fu ctio
Press to Select a Modifier Mode
Press to Select a Ra ge
AC220V 50Hz
THERE ARE NO PARTS TO DISASSEMBLE,
NO MECHANICAL ADJUSTMENTS TO MAKE,
IT IS DISALLOWED TO OPEN THE CASE.
TO AVOID SHOCK HAZARD, CONNECT THE
INSTRUMENT POWER CORD TO A POWER
RECEPTACLE WITH EARTH GROUND.
USB

For more details o the uses of each butto , refer to Sectio 3, “OPERATION THE METER FROM
THE FRONT PANEL.”
SELECTING A MEASUREMENT RANGE
Measureme t ra ges ca be selected automatically by the meter i “autora ge” or ma ually by the user.
I the autora ge mode, the meter selects the appropriate ra ge for the measureme t readi g.
To ma ually select a ra ge, press AUTO to toggle i (a d out) of the ma ual ra gi g mode, or press
or . I the ma ual ra ge mode, press or to up ra ge or dow ra ge to the desired ra ge. For
more details o ra gi g, refer to “RANGING” i Sectio 3.
TAKING SOME BASIC MEASUREMENTS
WARNING
READ MULTIMETER SAFETY” BEFORE OPERATING THIS METER.
The followi g procedures describe the basics of taki g commo measureme ts from the fro t pa el.
These procedures are provided for the user who eeds to get started quickly, but dose ot wa t to
read the rest of the ma ual at this time. However, i order to take full adva tage of your meter, you
should read the remai der of this ma ual carefully a d 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, resista ce, or freque cy, press the desired fu ctio butto a d co ect the test
leads as show i Figure 2-4. The meter will select the appropriate ra ge i the autora ge mode.
Measuring Current
To measure curre t, i sert the red test lead i the mA
i put termi al for curre ts up to 330mA or i the 10A i put
termi al for higher curre t, a d i sert the black test lead i the
COM termi al.
Co ect the test leads as show i 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. Measuri g Curre t
Diode/Continuity Testing
The co ti uity test determi es whether a circuit is i tact (i.e., has a resista ce less tha about
150Ω). To perform a co ti uity test, press , a d co ect the
test leads as show i Figure 2-6. The beeper emits a co ti uous
beep whe the i put drops below 150Ω (Beep co ditio ca be
cha ged, refer to “Cha gi g the Power-UP Co figuratio ” later i
Sectio 3), a d the readi gs for the test circuit are displayed.
The diode test measures the forward voltage of a semico ductor ju ctio
5
MAX
750V
1000V
10A FUSED
250V
ALL INPUTS
1KV MAX
FAST FUSE
500mA
mA
TEST
CI RCUI T
+
-
Figure 2-6. Co ti uity Testi g
MAX
750V
1000V
10A FUSED
250V
ALL INPUTS
1KV MAX
FAST FUSE
500mA
mA
DC Voltage,Pesista ce
or AC Voltage
Figure 2-4. Measuri g DC Voltage, Resista ce, AC Voltage
MAX
750V
1000V
10A FUSED
250V
ALL INPUTS
1KV MAX
FAST FUSE
500mA
mA
CURRENT
SOURCE
mA
A

at approximately 0.8mA. Readi gs are displayed i the 3V ra ge at the fast measureme t rates. “OL” is
displayed for voltages above 2.0V. U der ormal measureme t co ditio , the positive pole of diode is
co ected with the black test lead.
To perform a diode or tra sistor ju ctio test, press to
select the diode fu ctio . The co ect the test leads across
the diode as show i Figure 2-7.
Notice how the test leads are placed. Reversi g the polarity will
reverse-bias the diode.
dBm (Decibels) measure
The decibels modifier takes a ac voltage measureme t, co verts it to dBm (measure of decibels
relative to o e milliwatt), a d displays the result o the primary display. Co ect the test leads as
show i Figure 2-4.
Press dBm to toggle i a d out of the decibels mode. Whe the decibels mode is selected, “dBm” is
show o the primary display, AC voltage value is show o the seco dary display.
Decibels ca be selected o ly whe ac voltage fu ctio is selected. Decibels are always displayed
i a si gle, fixed ra ge with 0.01 dB resolutio . Press the AUTO toggle i a d out autora ge, you
ca also press the . a d cha ge ra ge ma ually.
A voltage measureme t is co verted to dBm usi g the followi g formula:
dBm = 10*lg (1000*value2/refere ce impeda ce)
where “value” is the measureme t value, a d displayed o the seco dary display. The refere ce impeda ce
ca be cha ged. (Refer to “Cha gi g the Power-UP Co figuratio ” later i Sectio 3).
Communication Interface
The real time measured value ca be tra smitted to the computer by the devote USB cable a d the
VICTORVIEW_8145B software (refer to “usi g the commu icatio fu ctio ”i sectio 3).
SECTION 3
Operating the Meter from the Front Panel
INTRODUCTION
Sectio 3 explai s how to operate the meter from the fro t pa el.
FRONT PANEL OPERATIONS
The followi g operatio s ca be performed from the fro t pa el:
Select a measureme t fu ctio ( DCV, ACV, DCA, ACA, Ω, FREQ, dBm
a d )
Select fu ctio modifiers that cause the meter to display relative readi gs (REL), mi imum
,maximum or average values (MN MX)
E ter the Touch Hold mode (HOLD) to hold a readi g o the display
Set Measureme t Rate (RATE), cha ge the rate as “F”(Fast) or “S”(Slow)
Take a measureme t a d compare (COMP) it to a setti g value
Select the ma ual or autora ge mode (AUTO), up ra ge or dow ra ge ma ually to
desired ra ge
Tur o or tur off the back light (whe arrive the setti g time the back light ca automatically off)
Power-o or off the power supply (POWER)
6
MAX
750V
1000V
10A FUSED
250V
ALL INPUTS
1KV MAX
FAST FUSE
500mA
mA
Figure 2-7. Diode Testi g

These operatio s are described i remai der of Sectio 3.
DISPLAY
The meter has a 5-digit, Liquid Crystal Display (Primary Display) a d a 4-digit, Liquid Crystal Display
(Seco dary Display). The display shows measureme t readi gs, measureme t u its a d
messages. As show i Figure 3-1.
INPUT TERMINALS
The i put termi als, as show i Figure 3-2, are
located o the right of the fro t pa el
The meter is protected agai st overloads up to the
limits show i Table 3-1. Exceedi g these limits
poses a hazard to both the meter a d operator.
Figure 3-2. I put Termi als
Table 3-1. Input Limits
FUNCTION INPUT TERMINALS MAXIMUM INPUT
V VΩ a d COM 1000V dc o all ra ges
V ~, FREQ a d dBm VΩ a d COM 750V ac rms,1000V peak o all ra ges
mA a d mA ~mA a d COM 500mA dc or ac rms
A ~ a d A ~10A a d COM 10A dc or ac rms
Ω VΩ a d COM 250V dc or ac rms o all ra ges
VΩ a d COM 250V dc or ac rms o all ra ges
All Fu ctio s A y termi al to earth 1000V dc or ac peak
SELECTING A MEASUREMENT FUNCTION
Press a fu ctio butto , as show i Figure 3-3, to select a measureme t fu ctio . Whe you select
a fu ctio , a u ciators tur o to i dicate the fu ctio selected. Ra g a d full scale values are
summarized i Table 3-2 for voltage, curre t, ohms a d freque cy
Figure 3-3. Fu ctio Select Butto s
7
Readi g Rate
High Voltage
Relative Modifier
Primary Display
Diode Test Co ti uity Test Save
Fu ctio a d U it
A u ciators
Seco dary Display
Time
Hold
MIN MAX
Modifier
Autora geCalibratio state
Figure 3-1. Display A u ciators
DCV
ACV FREQ
DCA
ACA
AUTO
MN
SHIFT
MX
HOLD
COMP
ON
1
POWER
OFF
0
RANGE
dBm
REL
RATE
readi g rate
ACA FREQ
DCA
ACV
DCV
Volts DC Amps DC Resista ce
Volts AC
Amps AC
Diode
Co ti uity
Freque cy
dBm
dBm
8145A
MAX
750V
1000V
10A FUSED
250V
ALL INPUTS
1KV MAX
FAST FUSE
500mA
mA
Volts, Ohms, Diode Test i put Termi al
Commo Termi al. Reter Termi al
for all Measureme ts
Amperes I put Termi al. For
Curre t Measureme ts up to 10A
co ti uous
Milliamperes I put Termi al.
For Curre t Measureme ts
up to 500mA

DCV
ACV FREQ
DCA
ACA
AUTO
MN
SHIFT
MX
HOLD
COMP
ON
1
POWER
OFF
0
RANGE
dBm
REL
RATE
读数速率键
AUTO
Press to Toggle I a d Out of Autora ge
Press to E ter Ma ual Ra ge a d Up Ra ge
Press to E ter Ma ual Ra ge a d Dow Ra ge
Table 3-2. Voltage, Current, Ohms and Frequency Rang and Full Scale Value
FUNCITION RANG FULL SCALE INFORMATION
V ~ a d V
300mV 330.00mV *760V ac rms
3V 3.3000V
30V 33.000 V
300 V 330.00 V
1000V* 1100.0 V*
mA ~ a d mA 0.3mA** 0.33000 mA** **AC current have not 0.3mA and
3mA range
3mA** 3.3000 mA**
30mA 33.000 mA
300 mA 330.00 mA
A ~ a d A 10A 11.000A
Res stance 300Ω 330.00Ω
3KΩ3.3000 KΩ
30 KΩ33.000 KΩ
300 KΩ330.00 KΩ
3MΩ3.3000 MΩ
30 MΩ33.000 MΩ
100 MΩ110 MΩ
Frequency 300Hz 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, , )
Ra gi g operatio s are performed usi g the AUTO, a d butto s (see Figure 3-4).
Autoranging
Whe you are i the autora ge mode, the “AUTO” a u ciator is lit.
I autora ge, the meter automatically selects the ext higher ra ge whe a readi g is greater tha
full scale. If o higher ra ge is
available, “OL” (overload) is
displayed. The meter automatically
selects a lower ra ge whe a
readi g is less tha approximately
10% of the selected ra ge.
Figure 3-4. Ra ge Selectio Buto s
Manual Ranging
Press AUTO to toggle i a d out of ma ual ra gi g. The ra ge you are i whe you e ter the ma ual
ra ge mode becomes the selected ra ge.
I ma ual ra ge, the meter remai s i the selected ra ge regardless of i put. Press AUTO to toggle
back to autora gi g.
Press to up ra ge. If the is pressed whe the meter is still i autora ge, ma ual ra gi g is
selected, the “AUTO” a u ciator tur s off, a d the ext higher ra ge is selected (if there is o e).
Press to dow ra ge. If the is pressed whe the meter is still i autora ge, ma ual ra gi g is
selected, the “AUTO” a u ciator tur s off, a d the ext lower ra ge is selected (if there is o e).
Whe o e fu ctio of Volts DC, Amps DC, Volts AC, Amps AC, Resista ce or FREQ is selected, the
8

selected ra ge is displayed o the seco dary display.
MEASURING FREQUENCY ( FREQ )
Press the FREQ butto to select the freque cy fu ctio , the freque cy is displayed o the primary
display a d the selected ra ge is displayed o the seco dary display. Select the ra g ma ually or
automatically
Frequency Measurement Rates
The rate at which freque cy measureme ts are take is selected by the meter automatically, whe
the freque cy fu ctio has bee selected, press RATE has o effect o the freque cy update rate.
Frequency Sensitivity Selection
Before a freque cy measureme t is started, the amplitude of the i put sig al is sampled a d the
optimum ac voltage ra ge is selected automatically. For more i formatio refer to the Sectio 6 for ac
voltage se sitivity.
The i put sig al se sitivity is based o si e waveforms. If the i put sig al is below the required level,
the freque cy will be displayed as zero. If the measureme ts are u stable, the i put sig al may be
ear the threshold level.
SELECT A FUNCTION MODIFIER ( REL , HOLD , MNMX , COMP )
Selecti g a fu ctio modifier causes the meter to
perform a actio o a i put (e.g., co vert to
relative readi g mode or compare to a other
value) before a readi g is displayed. To use a
fu ctio modifier, press a fu ctio butto to
select a primary fu ctio , a d the press a
fu ctio modifier butto . See Figure 3-5
REL (Relative Readings) Modifier
Press REL to select the relative modifier. Whe the relative modifier is selected: the last valid readi g
is stored as the relative base a d displayed o the seco dary display. The readi g o the primary
display is always the differe ce betwee the relative base a d a i put measureme t, a d the “△”
a u ciator tur o .
REL=prese t readi g - relative base
For example, if the relative base is 15.000V, a d the prese t readi g is 14.100V, the display
will show -0.900V.
WARING
REMEMBER, A RELATIVE READING MAY NOT INDICATE THE PRESENCE OF DANGEROUS
VOLTAGES AT THE INPUT CONNECTORS OR TEST LEADS. USE CAUTION TO AVOID
ELECTRICAL SHOCK OR DAMAGE TO THE METER.
Press REL agai , the relative base is displayed o the seco dary display. The readi g o the primary
display is REL%, a d the “%” a u ciator tur o simulta eous.
For example, if the relative base is 15.000V, a d the prese t readi g is 14.100V, the display will
show -6%. Press REL agai 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.)
Selecti g the relative modifier (REL) tur s off autora gi g a d locks i the prese t ra ge. Make sure
you are i the correct ra ge before selecti g the relative modifier. If you press other butto s after the
relative modifier has bee selected, you will automatically exit REL.
9
DCV
ACV FREQ
DCA
ACA
AUTO
MN
SHIFT
MX
HOLD
COMP
ON
1
POWER
OFF
0
RANGE
dBm
REL
RATE
读数速率键
REL COM P
HOLD
MXMN
Relative Modifie r
MN MX Modif ier
Compare Modif ier
Touch Hold Mod ifier
Figure 3-5. Fu ctio Modifier Selectio Butto s
REL%=
prese t readi g-relative base
relative base ×100%

HOLD (Touch Hold) Modifier
The Touch Hold modifier allows you to hold the measureme t readi g o the display.
Press HOLD to select the Touch Hold modifier. Whe Touch Hold is selected, “HOLD” a u ciator is
lit o , a d the beeper emits a si gle beep. Press HOLD agai to exit Touch Hold modifier, a d the
beeper emits a si gle beep.
MN MX AVG (Minimum Maximum Average) Modifier
The MN MX modifier causes the meter to store the mi imum a d maximum i puts measured si ce
the MN MX AVG modifier was selected. Press MN MX to select the MN MX AVG modifier. Whe the
MN MX AVG modifier is first selected, the mi imum, maximum a d average values are set to the
displayed readi g a d the “MAX” a u ciator lights, o ce the maximum value showed o the primary
display, the beeper emits a si gle beep. Press MN MX agai to display the mi imum readi g a d the
“MIN” a u ciator lights, o ce the mi imum value showed o the primary display, the beeper emits a
si gle beep. Press MN MX agai to display the average readi g o the primary display (“AVG”
a u ciator lights). Each subseque t press the MN MX butto toggles amo g the mi imum,
maximum a d average measureme ts take . The measureme t readi g displayed o the seco dary
display. To exit the MN MX AVG modifier, press a d hold dow the MN MX butto for two seco ds or
press other fu ctio butto s.
Selecti g the MN MX AVG modifier tur s off autora gi g a d locks i the prese t ra ge. Make sure
you are i the correct ra ge before selecti g the MN MX AVG modifier.
COMP (Compare) Modifier
The compare fu ctio (COMP) provides a easy way to determi e if a readi g falls withi a
desig ated ra ge of values. I the compare mode, the meter displays a readi g i the seco dary
display a d i dicates i the primary display if that value is lower (CO-LO) tha , higher (CO-HI) tha ,
or withi a ra ge (PASS) you selected, if the readi g lower or higher, the beeper emits a co ti uous
to e. Compare Modifier ca be used u der dc voltage, ac voltage, dc curre t, ac curre t a d omh
fu ctio , i compare mode, the meter is i ma ually ra ge mode..
Followi g the step to e ter Compare Modifier
Select a fu ctio a d a ra ge
Press COMP to toggle i Compare Modifier
Before selecti g the compare fu ctio , set the high a d low compare poi t first, whe compare
modifier selected, “MAX” a u ciator lights, a d the leftmost digit o the primary display is
flashi g, the ca set the high poi t, press AUTO to select the digit to be set, each press AUTO
causes the digit to the right to be selected a d flashi g, press or to up or dow the
flashi g digit. Press the COMP agai , “MIN” a u ciator lights, a d the leftmost digit o the
primary display is flashi g, the ca set the low poi t, press AUTO to select the digit to be set,
each press AUTO causes the digit to the right to be selected a d flashi g, press or to up or
dow the flashi g digit. Each subseque t press the COMP butto toggles betwee high set, low
set a d compare measureme ts take . To exit the Compare Modifier, press a d hold dow the
COMP butto for two seco ds or press other fu ctio butto s.
Selecti g the Compare Modifier tur s off autora gi g a d locks i the prese t ra ge. Make sure you
are i the correct ra ge before selecti g the Compare Modifier.
The fu ctio modifier is relative to the measureme t fu ctio refer to the Table 3-5
Table 3-5. fu ctio modifier a d measureme t fu ctio
FUN. Modifier
Fu ctio
REL HOLD MNMX COMP
DCV √ √ √ √
ACV √ √ √ √
DCA √ √ √ √
10

FUN. Modifier
Fu ctio
REL HOLD MNMX COMP
ACA √ √ √ √
Ω √√√√
FREQ √
√
√
dBm √
SELECTING A MEASUREMENT RATE (RATE)
The meter takes measureme ts at o e of two, user-selectable rates: slow a d fast. The rate selected is
i dicated by “S”, “F” o the display.
Press the RATE to cha ge the measureme t rates at “S” or “F”. The selected rate applies to DCV 、
DCA Ω、 、ACV、ACA、dBm.
Note:
I Diode a d Co ti uity Testi g, the default rate is “F”
I 30M Ω a d 300M Ω ra g, the default rate is “S”
Co ect with the USB
Plug the o e e d of the devote USB cable to the commu icatio co ector o the real pa el, plug the
other e d of the cable to the USB port of the computer, ru i g the devote DMMVIEW_8145B software, set
the correspo di g co ector port to achieve o li e. Whe success, the COMM a u ciator is lit o , the
i strume t tra smits measured value a d state to computer, thus, the computer ca remote Co trol, display,
record, Data A alysis, pri t all the measureme t process. use the software stop the commu icatio , the
i strume t stop tra smit measured value a d the COMM a u ciator disappear．
POWER-UP CONFIGURATION
Factory Setting of Power-Up Configuration
Whe the meter is tur ed o a d completes the power-up seque ce, it assumes its power-up
co figuratio . The power-up co figuratio set at the factory is show i Table3-6.
Table 3-6. Power-Up Co figuratio Set at Factory
PARAMETER CONFIGURATIONS REMARK
Fu ctio Setti g
Ra ge Mode
Readi g Rate
DC volt（DCV）
Autora ge（AUTO）
Slow（S）
Refere ce Impeda ce （for dBm）600Ω Cha geable
Compare set value
MIN/MAX/AVG
Relative Base value
0
0
0
Freque cy of Power 50Hz Cha geable
Back Light Time 0000 S Cha geable
Co ti uity beep whe the i put drops below 150Ω Cha geable
Compare beep if the readi g lower or higher set value Cha geable
Changing the Power-Up Configuration
You ca cha ge the power-up co figuratio to o e that more closely meet your eeds a d
prefere ces. To cha ge the Power-Up Co figuratio , power-up the meter a d press SHIFT
simulta eity
1. Cha ge Back Light Time: Press AUTO, whe “bLOFF” is a u ciator showed o the primary
11

display. The value of setti g is showed o the seco dary display, the press
or to step up or dow the setti g value with 30S. The limit of the setti g value is 3600S(1
hour), whe the setti g value is “0000” i dicates that back light o ly be tur ed off ma ually.
Press the HOLD save the set value, the “memory” a u ciator is lit o .
2. Cha ge Freque cy of Power: Press AUTO, whe “FrSET” a u ciator is showed o the
primary display, the Freque cy is showed o the seco dary display, the press or
to select the freque cy at 50Hz or 60Hz. (O ce cha ge the Freque cy of Power, the meter
should be calibrated ewly). Press the HOLD save the set value, the “memory” a u ciator is lit
o .
3. Cha ge the Refere ce Impeda ce: Press AUTO, whe “CONS” a u ciator is showed o the
primary display, the Refere ce Impeda ce is showed o the seco dary display. The press or
to select the eeded value (supplied value are 50, 75, 93, 100, 150, 300, 500, 600, 800, 1200,
2400 (u it: Ω)). Press the HOLD save the set value, the “memory” a u ciator is lit o .
4. Cha ge the co ti uity beep mode: Press AUTO, whe “CH-BB” a u ciator is showed o the
primary display, the “YES”(co ect beep) or ”NO”(disco ect beep) is showed o the
seco dary display. Press the HOLD save the set value, the “memory” a u ciator is lit o .
5. Cha ge the compare beep mode: Press AUTO, whe “CO-BB” a u ciator is showed o the
primary display, the “YES”(i side the limiter) or ”NO”(exceed the limiter) is showed o the
seco dary display. Press the HOLD save the set value, the “memory” a u ciator is lit o .
6. Factory set: Press AUTO, whe “FACTY” a u ciator is showed o the primary display, select
the default factory set. To resume the factory set, Press the HOLD save the default value. To
exit factory set mode, power off the i strume t.
S
SECTION 4
Maintenance
NOTE
When servicing the meter, use only the replacement parts specified
INTRODUCTION
Sectio 4 provides the i formatio ecessary for the user to perform basic mai te a ce. Users should
ot attempt to perform mai te a ce ot described i this sectio . Qualified service perso el should
refer to this Ma ual for complete mai te a ce, service.
CAUTION
TO AVOID ELECTRICAL SHOCK OR DAMAGING THE METER, NEVER GET WATER INSIDE
THE CASE. TO AVOID DAMAGING THE METER HOUSING, NEVER APPLY SOLVENTS TO
THE METER. IF THE METER REQUIRES CLEANING, WIPE IT DOWN WITH A CLOTH THAT IS
LIGHTLY DAMPENED WITH WATE OR A MILD DETERGENT. DO NOT USE AROMATIC
HYDROCARBONS, CHLORINATED SOLVENTS, OR METHANOL-BASED FLUIDS WHEN
WIPING DOWN THE METER.
THE LINE FUSE
CAUTION
OPENING THE CASE MAY EXPOSE HAZARDOUS VOLTAGES. ALWAYS DISCONNECT THE
POWER CORD AND MEASURING INPUTS BEFORE OPENING THE CASE.
1. Remove the screw o each side of the real bezel.
2. Remove the case from the meter. The fuse is visible at the fro t of the mai pri ted circuit
12

assembly ear the power. The meter uses a 0.2A, 250V (Slow blow) li e fuse.
3. Carefully remove the fuse a d replace it with o e rated as listed above
4. Reverse the disassembly procedure to reassemble the meter.
CURRENT INPUT FUSES
300mA (i clude 300mA) a d 10A i puts are protected by user-replaceable fuses.
The 300mA i put is protected by a fuse rated at 500mA, 250V (Fast blow).
The 10A i put is protected by a fuse rated at 11A, 250V (Fast blow).
Testing Current Input Fuses
Perform the followi g procedure to test these fuses:
1. Short the VΩ i put termi al a d the mA termi al with a test lead.
2. Press Ω to select the ohms fu ctio . I sert the test lead probe i to the mA i put termi al. If the
fuse is good, the meter will read betwee 1Ω to 19Ω. If the fuse is blow , the meter will read
>10MΩ to OL.
3. Remove the test lead probe from the mA i put termi al a d i sert it i to the 10A i put termi al.
If the fuse is good, the meter will read betwee 0.00 a d 0.05Ω. If the fuse is blow , the meter
will read >10MΩ to OL.
Replacing the mA Input Fuse
CAUTION
FOR PROTECTION AGAINST FIRE, REPLACE A BLOWN FUSE ONLY WITH ONE OF
IDENTICAL
The mA i put fuse is mou ted i the fro t pa el i put jack (see Figure 3-2). To replace this fuse, first
u plug the li e cord. The press i o the i put jack a d tur it 90 degrees cou ter-clock wise, slide
out the fuse holder a d fuse.
Replace a blow fuse with o e of ide tical rati g a d rei sert the fuse a d holder i to the i put
termi al socket. Secure the fuse holder by pressi g i a d tur i g the holder 90 degrees clockwise.
Replacing the 10A Input Fuse
CAUTION
OPENING THE CASE MAY EXPOSE HAZARDOUS VOLTAGES. ALWAYS DISCONNECT THE
POWER CORD AND MEASURING INPUTS BEFORE OPENING THE CASE.
The 10A i put fuse is located i side the meter. To replace the fuse:
1. Remove the screw o the bottom of the case.
2. Remove the case from the meter. The fuse is visible o the mai pri ted circuit, which is
co ected with the 10A i put termi al.
3. Carefully remove the fuse a d replace it with o e rated as listed above.
4. Reverse the disassembly procedure to reassemble the meter.
PERFORMANCE TESTS
The meter should be calibrated a d i operati g co ditio whe you receive it.
The followi g performa ce tests are provided to e sure that the meter is i proper operati g
co ditio . If the i strume t fails a y of the performa ce tests, the calibratio adjustme t a d/or
repair is eeded. To perform these tests, you will eed a 5520A Multifu ctio Calibrator or
equivale ts. Each of the measureme ts listed i the followi g steps assume the i strume t is bei g
tested after a o e-hour warmup, i a e viro me t with a ambie t temperature of 18 to 28℃, a d
a relative humidity of less tha 70%.
NOTE
All measurements listed in the performance test tables are made in the slow reading rate unless
otherwise noted.
1. Co ect a test lead from the Output NORMAL HI a d LO co ectors of the 5520A to the VΩ
a d COM co ectors o the meter (see Figure 4-1).
13

Select the Volts dc, Volts ac, Resista ce
or Freque cy fu ctio a d ra ge o the
meter a d the i put level from the 5520A.
The display should meet the request listed
i Sectio 6.
2. Co ect a test lead from the output AUX
HI a d LO co ectors of the 5520A to the
mA a d COM co ectors o the meter
(see Figure 4-2). Select the Curre t ac or
Curre t dc fu ctio a d 300mA ra ge o the meter a d the i put level from the 5520A. The
display should meet the request listed i Sectio 6.
3. Co ect a test lead from the output 20A HI a d LO co ectors of the 5520A to the 10A a d
COM co ectors o the meter (see Figure 4-3). Select the Curre t dc or Curre t ac fu ctio a d
10A ra ge o the meter a d the i put level from the 5520A. The display read should meet the
request listed i Sectio 6.
SERVICE
If you suspect that the meter has failed, review this ma ual to make sure you are operati g it
correctly. If the meter still fails to operate properly, pack it securely (i its origi al co tai er if
available) a d forward it, postage paid, to the earest Service Ce ter. Assumes o respo sibility for
damage i tra sit.
SECTION 5
Calibration
INTRODUCTION
To e sure the accuracy a d the stability of the meter, the meter should be calibrated o a regular cycle of o e
year.
REQUIRED EQUIPMENT (refer to the table5-1)
Table5-1. Recomme ded Test Equipme t
Measurement Multifunction Range Accuracy±
（%Output）
Recommended Equipment
DCV 300mV,3V,30V,300V,
1000V
0.0002 FLUKE
5520A
ACV 300mV,3V,30V,300V,
1000V
20~50Hz 0.025
50 Hz~10KHz 0.015
10~20KHz 0.022
20~50KHz 0.03
OHMS 300Ω,3KΩ,30KΩ, 300KΩ 0.004
3MΩ,30 MΩ,100 MΩ 0.05
DCA 0.3mA, 3mA, 30mA, 300mA 0.025
10A 0.1
14
STANDARD SOURSE 5520A
AUXNORMAL SCOPE
TRIG
OUT
MAX
750V
1000V
10A FUSED
250V
ALL INPUTS
1KV MAX
FAST FUSE
500mA
mA
Figure 4-1
STANDARD SOURCE 5520A
AUXNORMAL SCOPE
TRIG
OUT
MAX
750V
1000V
10A FUSED
250V
ALL INPUTS
1KV MAX
FAST FUSE
500mA
mA
Figure 4-2.
STANDARD SOURCE 5520A
AUXNORMAL SCOPE
TRIG
OUT
MAX
750V
1000V
10A FUSED
250V
ALL INPUTS
1KV MAX
FAST FUSE
500mA
mA
Figure 4-3.

ACA 3mA, 30mA, 300mA 20~50Hz 0.09
50 Hz~1KHz 0.04
1~5KHz 0.1
5~10KHz 0.16
10~30KHz 0.32
10A 50 Hz~5KHz 0.1
FREQ 300Hz ,3KHz
30KHz,300KHz
3MHz 30MHz
0.00025 3MHz/30MHz 时用 VC5020
AMBIENT ENVIRONMENT STATION
Temperature: 23±2℃
Relative humidity: ≤70%RH
Power : varied at 5% of rated voltage
Freque cy of power: rated value±1Hz
Warmup: 2 hours for sta dard equipme t, 1 hour for measured meter
OPERATION FOR CALIBRATOR
Calibrate the fu ctio s a d ra ges listed i the table 5-2.
Table 5-2. INPUT SIGNAL
Fu ctio Ra ge I put 1（First）I put 2（Seco d）U it
Volts dc DC300mV 300.00 mV
DC3V 3.0000 V
DC30V 30.000 V
DC300V 300.00 V
DC1000V 1000.0 V
Volts ac AC300mV（1KHz）30.00 300.00 mV
AC3V（1KHz）0.3000 3.0000 V
AC30V（1KHz）3.000 30.000 V
AC300V（50Hz）30.00 300.00 V
AC750V（50Hz）75.0 750.0 V
Resista ce 300Ω 300.00 Ω
3KΩ 3.0000 KΩ
30KΩ 30.000 KΩ
300KΩ 300.00 KΩ
3MΩ 3.0000 MΩ
30MΩ 10.000 MΩ
300MΩ 10.000 MΩ
Curre t dc DC0.3mA 0.30000 mA
DC3mA 3.0000 mA
DC30mA 30.000 mA
DC300mA 300.00 mA
DC10A 3.0000 A
Curre t ac AC0.3mA（1KHz）0.03000 0.30000 mA
AC3mA（1KHz）0.3000 3.0000 mA
AC30mA（1KHz）3.000 30.000 mA
AC300mA（1KHz）30.00 300.00 mA
AC10A（1KHz）0.300 3.000 A
Freque cy(3V
of si e wave)
3KHz 3.0000 KHz
NOTE
To calibrator the meter, connect the instrument power cord to a power receptacle with earth ground.
DC Volts calibration
1) Tur o the meter, press the DCA, dBm a d butto simulta eity to e ter calibratio mode, a d the
“CAL” appears o the top left cor er of the LCD(the “CAL” a u ciator always appears i calibratio
15

mode), a d the meter default e ter to 300mV DC volts calibratio mode.
2) Placed the sta dard equipme t i the “STBY” state, a d co ected with the meter as show i Figure
5-1.
3) Set the sta dard equipme t to DCV, a d adjust u til the display reads 300mV, press the OPR butto
to output.
4) Press the SHIFT butto of the meter to
calibrate the rated ra ge for the DCV fu ctio , a d the
display reads the calibrated poi t.
5) Press the REL butto to save the calibrated
value after 5 seco ds, a d the “SAVE” displayed o the
LCD; if the “ERR” displayed, check the set value for the
sta dard equipme t, a d i spect the fu ctio a d the
method of the li e co ectio right or ot ewly.
6) Press the butto to cha ge ra ge (i calibratio mode, the meter is i ma ual ra ge)
7) Set the sta dard equipme t to the required output.
8) Repeat step 4 to 7 u til complete all ra ge.
Note
Be sure that the standard equipment is in the “STBY” state before change the function.
DC 300mA amps calibration
1) Placed the sta dard equipme t i the “STBY” state, press the DCA butto a d the meter default e ter
to 300mA DC Amps calibratio state.
2) Co ect the sta dard equipme t with the meter as show i Figure 5-2.
3) Adjust the sta dard equipme t u til the display reads 300mA, press the OPR butto to output.
4) Press the SHIFT butto of the meter to calibrate the
300mA ra ge, a d the display reads the calibrated
poi t.
5) Press the REL butto to save the calibrated value
after 5 seco ds, a d the “SAVE” displayed o the
LCD; if the “ERR” displayed, check the set value for
the sta dard equipme t, a d i spect the fu ctio
a d the method of the li e co ectio right or ot
ewly
DC 10A amps calibration
1) Placed the sta dard equipme t i the “STBY” state, press the DCA butto to e ter to DCA calibratio
state.
2) Co ect the sta dard equipme t with the meter as
show i Figure 5-3.
3) Press the butto to select the 10A ra ge.
4) Press the SHIFT butto of the meter to calibrate the
10A ra ge, a d the display reads 3A, Applied the
sta dard equipme t 3A to the meter.
5) Press the REL butto to save the calibrated value
after 5 seco ds, a d the “SAVE” displayed o the
LCD; if the “ERR” displayed, check the set value for the sta dard equipme t, a d i spect the fu ctio
a d the method of the li e co ectio right or ot ewly.
AC Volts calibration
1) Placed the sta dard equipme t i the “STBY” state, press the ACV butto to e ter to AC Volts
calibratio state.
2) Co ect the sta dard equipme t with the meter as show i Figure 5-1 before.
16
sta dard source 5520A
AUXNORMAL SCOPE
TRIG
OUT
MAX
750V
1000V
10A FUSED
250V
ALL INPUTS
1KV MAX
FAST FUSE
500mA
mA
Figure 5-1
sta dard source 5520A
AUX
NORMAL SCOPE
TRIG
OUT
MAX
750V
1000V
10A FUSED
250V
ALL INPUTS
1KV MAX
FAST FUSE
500mA
mA
Figure 5-2
sta dard source 5520A
AUXNORMAL SCOPE
TRIG
OUT
MAX
750V
1000V
10A FUSED
250V
ALL INPUTS
1KV MAX
FAST FUSE
500mA
mA
Figure 5-3

3) Press the SHIFT butto of the meter e ter to the 300mV ra ge calibratio .
4) Press the MNMX butto of the meter, select the 30mV calibratio poi t, a d the “F” a u ciator
appears o the top left cor er of the LCD, 1KHz appears o the seco dary display i dicates the
freque cy of the applied sig al should be 1KHz.
5) Applied the sta dard equipme t 30mV, 1KHz to the meter.
6) Keep the meter at least 20 seco ds, press the REL butto to save the calibrated value, a d the
“SAVE” displayed o the LCD; if the “ERR” displayed, check the set value for the sta dard
equipme t, a d i spect the fu ctio a d the method of the li e co ectio right or ot ewly.
7) Press the MNMX butto agai to select the 300mV calibratio poi t, a d the “S” a u ciator appears
o the top left cor er of the LCD, 1KHz appears o the seco dary display i dicates the freque cy of
the applied sig al should be 1KHz.
8) Applied the sta dard equipme t 300mV, 1KHz to the meter.
9) Keep the meter at least 20 seco ds, press the REL butto to save the calibrated value, a d the
“SAVE” displayed o the LCD; if the “ERR” displayed, check the set value for the sta dard
equipme t, a d i spect the fu ctio a d the method of the li e co ectio right or ot ewly.
10) Press the butto to cha ge ra ge.
11) Repeat step 3 to 10 u til complete all ra ge.
AC 30/300mA amps calibration
1) Placed the sta dard equipme t i the “STBY” state, press the ACA butto a d the meter default e ter
to 30mA AC calibratio state.
2) Co ect the sta dard equipme t with the meter as show i Figure 5-2 referred before.
3) Press the SHIFT butto of the meter to calibrate the 30mA ra ge.
4) Press the MNMX butto of the meter, select the 3mA calibratio poi t, a d the “F” a u ciator
appears o the top left cor er of the LCD, 1KHz appears o the seco dary display i dicates the
freque cy of the applied sig al should be 1KHz.
5) Applied the sta dard equipme t 3mA、1KHz to the meter.
6) Keep the meter at least 20 seco ds, press the REL butto to save the calibrated value, a d the
“SAVE” displayed o the LCD; if the “ERR” displayed, check the set value for the sta dard
equipme t, a d i spect the fu ctio a d the method of the li e co ectio right or ot ewly.
7) Press the MNMX butto agai to select the 30mA calibratio poi t, a d the “S” a u ciator appears
o the top left cor er of the LCD, 1KHz appears o the seco dary display i dicates the freque cy of
the applied sig al should be 1KHz.
8) Applied the sta dard equipme t 30mA、1KHz to the meter.
9) Keep the meter at least 20 seco ds, press the REL butto to save the calibrated value, a d the
“SAVE” displayed o the LCD; if the “ERR” displayed, check the set value for the sta dard
equipme t, a d i spect the fu ctio a d the method of the li e co ectio right or ot ewly.
10) Press the butto cha ge the ra ge
11) Repeat step 3 to step 10 u til complete all ra ge.
AC 10A amps calibration
1) Placed the sta dard equipme t i the “STBY” state, press the ACA butto to e ter to AC Amps
calibratio state.
2) Co ect the sta dard equipme t with the meter as show i Figure 5-4.
3) Press the butto to select the 10A ra ge.
4) Press the SHIFT butto of the meter to calibrate the 10A ra ge.
5) Press the MNMX butto of the meter, select the 0.3A calibratio poi t, a d the “F” a u ciator
appears o the top left cor er of the LCD, 1KHz appears o the seco dary display i dicates the
freque cy of the applied sig al should be 1 KHz.
17

6) Applied the sta dard equipme t 0.3 A,
1KHz to the meter.
7) Keep the meter at least 20 seco ds, press
the REL butto to save the calibrated
value, a d the “SAVE” displayed o the
LCD; if the “ERR” displayed, check the set
value for the sta dard equipme t, a d
i spect the fu ctio a d the method of the
li e co ectio right or ot ewly.
8) Press the MNMX butto agai to select the
3A calibratio poi t, a d the “S” a u ciator appears o the top left cor er of the LCD, 1KHz appears
o the seco dary display i dicates the freque cy of the applied sig al should be 1KHz.
9) Placed the sta dard equipme t i the “STBY” state, Co ect the sta dard equipme t with the meter
as show i Figure 5-3 referred before.
10) Applied the sta dard equipme t 3A, 1KHz to the meter.
11) Keep the meter at least 20 seco ds, press the REL butto to save the calibrated value, a d the
“SAVE” displayed o the LCD; if the “ERR” displayed, check the set value for the sta dard
equipme t, a d i spect the fu ctio a d the method of the li e co ectio right or ot ewly.
12) Complete all ra ge.
Frequency Calibration
1) Placed the sta dard equipme t i the “STBY” state, press the FREQ butto a d the meter default
e ter to 3KHz ra ge calibratio state.
2) Co ect the sta dard equipme t with the meter as show i Figure 5-1 referred before.
3) Applied the sta dard equipme t 3V of si e wave, 3KHz to the meter.
4) Press the SHIFT butto of the meter to calibrate the i dicated ra ge displayed o the meter.
5) Keep the meter at least 5 seco ds, press the REL butto to save the calibrated value, a d the “SAVE”
displayed o the LCD; if the “ERR” displayed, check the set value for the sta dard equipme t, a d i spect
the fu ctio a d the method of the li e co ectio right or ot ewly.
Ohms calibration
1) Placed the sta dard equipme t i the “STBY” state, press the Ω butto a d the meter default e ter to
300Ω ra ge calibratio state.
2) Co ect the sta dard equipme t with the meter as show i Figure 5-5.
3) Applied the sta dard equipme t 300Ω to the meter,
a d select 2-wire compe satio o .
4) Press the SHIFT butto of the meter to calibrate the
i dicated ra ge displayed o the meter.
5) Keep the meter at least 10 seco ds, press the REL
butto to save the calibrated value, a d the “SAVE”
displayed o the LCD; if the “ERR” displayed, check
the set value for the sta dard equipme t, a d
i spect the fu ctio a d the method of the li e co ectio right or ot ewly.
6) Press the butto to cha ge ra g.
7) Applied the sta dard equipme t i dicated o the display to the meter, o ce the calibrated ra ge above
300KΩ, select 2-wire compe satio o , remove the li e co ected with the AUX termi al of the sta dard
equipme t.
8) Repeat step 5 to step 7 u til complete all ra ge.
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sta dard source 5520A
AUXNORMAL SCOPE
TRIG
OUT
MAX
750V
1000V
10A FUSED
250V
ALL INPUTS
1KV MAX
FAST FUSE
500mA
mA
Figure 5-4
sta dard source 5520A
AUXNORMAL SCOPE
TRIG
OUT
MAX
750V
1000V
10A FUSED
250V
ALL INPUTS
1KV MAX
FAST FUSE
500mA
mA
Figure 5-5

SECTION 6
Specifications
INTRODUCTION
This Sectio co tai s the specificatio s of the Dual Display Multimeter. These specificatio s assume:
A 1-year calibratio cycle
A operati g temperature of 18℃ to 28℃ (64.4℉~82.4℉)
O e-hour warmup
Slow readi g rate
Relative humidity ot exceedi g 70% ( o _co de si g)
Accuracy is expressed as ± (perce tage of readi g + digits).
READING RATES
DC VOLTAGE
Input Impedance
1000MΩ at 300mV a d 3V. 10MΩ at other ra ges.
Normal Mode Rejection Ratio (NMR)
≥60dB (at 50Hz or 60Hz)
Common Mode Rejection Ratio (CMR)
≥120dB (at 50Hz or 60Hz)
Maximum Input
1000V peak
TRUE RMS AC VOLTAGE, AC-COUPLED
Range Resolution Accuracy
20~50Hz 50 Hz~10KHz 10~20KHz 20~30KHz 30~50KHz
300mV 10uV 2%+30 0.5%+30 1%+80 5%+80 10%+150
3V 100uV
30V 1mV 3%+30
300V 10mV
750V 100mV
Rate Readings per Second
Slow（S）3
Fast（F）5~7
Range Resolution Accuracy
300mV
3V
30V
300V
1000V
10uV
100uV
1mV
10mV
100mV
0.03%+3
19

REMARK: Accuracy specificatio s apply to the ra ge from 10% to 100%
Input Impedance
1MΩ i parallel with 0.1µF
Maximum Crest Factor
3.0
Common Mode Rejection Ratio
>120dB at 50Hz or 60Hz (1KΩ u bala ced resista ce)
Maximum Input
750V rms, 1000V peak.
DC CURRENT
Range Resolution Accuracy Input Impedance
300 mA 10uA 0.1%+3 1Ω
10A 1 mA 1.5%+3 0.01Ω
Maximum Input
300mA. Protected with a 500mA, 250V fast blow fuse; 10A. Protected with a 11A, 250V fast blow fuse.
for 30 seco ds maximum.
TRUE RMS AC VOLTAGE, AC-COUPLED
Range Resolution Accuracy
20~50Hz 50 Hz ~2KHz 2~10 KHz 10~20 KHz 20~30 KHz
300mA 10uA 2%+30 0.5%+30 1%+80 5%+50
10A 1mA 1.5%+30 3%+30*
“*” i dicates that the ra ge for freque cy betwee 2~5KHz
Maximum Input
300mA. Protected with a 500mA, 250V fast blow fuse; 10A. Protected with a 11A, 250V fast blow fuse.
for 30 seco ds maximum.
Maximum Crest Factor
3.0
OMH
Range Resolution Accuracy Open Circuit
Voltage
Short Circuit Current
300Ω 10mΩ 0.05%+3 2.5V About 1mA
3KΩ 100 mΩ
30 KΩ 1Ω About 250uA
300 KΩ 10Ω About 25uA
3 MΩ 100Ω 0.1%+3 About 2.5uA
30MΩ 1 KΩ 0.2%+3 About 0.25uA
100MΩ 1 00KΩ 0.5%+3 About 0.25uA
20