8145C Dual Display Multi Meter
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Specifications:
- Designed and tested according to GB4793.1 (Equivalent of IEC
Publication 1010-1) - Safety Requirements for Electronic Measuring Apparatus
Product Usage Instructions:
Section 1: Introduction
This section provides an overview of the manual and highlights
the importance of following warnings and instructions for safe
operation and maintenance of the meter.
Section 2: Getting Started
Explains how to prepare the meter for operation, unpacking,
inspecting, and understanding the front and rear panel
components.
Preparations for Operation:
1. Unpack the meter carefully and inspect for any damage or
missing items.
2. Contact the seller if any issues are found.
3. Save the packaging materials for potential returns.
Front Panel and Rear Panel:
The front panel includes input terminals, display, and press
keys for selecting functions and operations.
The rear panel contains a power switch, power selection switch,
fuses, power interface, communication interface, and instrument
factory number label.
Section 3: Operating the Meter from the Front Panel
This section provides detailed descriptions of operations that
can be performed using the keys on the front panel.
Section 4: Maintenance
Instructions on basic maintenance procedures and how to replace
fuses when needed.
Section 5: Specifications
Provides detailed technical specifications of the meter
according to safety standards.
Section 6: Notes for the Manual
Additional information and warnings to ensure safe operation and
maintenance of the meter.
FAQ:
Q: What safety precautions should I follow before using the
meter?
A: Before using the meter, avoid working alone, follow safety
procedures for equipment being tested, inspect test leads for
damage, and check lead continuity to prevent hazardous
situations.
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SECTION 1 INTRODUCTION
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.
Caution This Manual contains information and warnings that must be followed to ensure safe operation and retain the meter in safe condition.
Warning
READ THE “MULTI-METER SAFETY” SECTION BEFORE USING THE METER. The Dual Display Multi-meter is a 5-digit high resolution mode. The meter is designed for bench-top. The features provided by the meter are: A dual, Liquid Crystal, Display that allows two properties of an input signal to be displayed at the same time. Accurate true rms AC value. 10uV sensitivity in volts DC. Precise K division measurement. Wide range capacity measurement. Slow and Fast selectable count resolution, with reading speeds of 3(Slow) and 20(Fast) reading per second, respectively. Panel calibration function (without open-case adjustment). Isolation of Universal Serial Bus(USB) Port Remote Control, display, record, Data Analysis, print with computer. Introduction of Sections 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
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your meter to its full advantage. Begin by scanning the Table of Contents to familiarize you 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 Multi-meter`s features and operation methods. SECTION 2. GETTING STARTED Explains how to prepare the meter for operation and get started quickly to take basic measurements from
the front panel. SECTION 3. OPERATING THE METER FROM THE FRONT PANEL Provides complete descriptions of each operation, which can be performed by pressing the keys 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. SPECIFICATIONS SECTION 6. NOTES FOR THE MANUAL
Multi-meter Safety The meter has been designed and tested according to GB4793.1(Equivalent of IEC Publication 1010-1
Safety Requirements for Electronic Measuring Apparatus). This manual contains information and warnings which must be followed to ensure safe operation and retain the meter in safe condition.
Some common international electrical symbols used in this manual are shown below.
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OFF(power) SWITCH POSITION
ON(POWER)
SWITCH POSITION
AC LOOP
DC LOOP
DANGEROUS VOLTAGE
EARTH GROUND
WARNING INFORMATION
Before using the meter, read the following safety information carefully: Avoid working alone Follow all safety procedures for equipment being tested Inspect the test leads for damaged insulation or exposed metal. Check test lead continuity. Damaged leads
should be replaced Be sure the meter is in good operating condition Select the proper function for your measurement. To avoid electrical shock, display` ‘when working above 30V dc or 30V ac RMS Disconnect the live test lead V before disconnecting the common test lead (COM) Disconnect the power and discharge high-voltage capacitors before testing in , and When making a current measurement, turn the circuit power off before connecting the meter in the circuit 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 hazardous.
SECTION 2
GETTING STARTED
Introduction Section 2 explains how to prepare the meter for operation, discusses general operating features, and walks
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you through the basics of taking some common measurements. Preparations for Operation Unpacking and Inspecting the Meter
Carefully remove the meter from its shipping container and inspect it for possible damage or missing items. If the meter is damaged or something is missing, contact the place of purchase immediately. Save the container and packing material in case you have to return the meter. Font Panel and Rear Panel
Front panel (shown in Figure 2-1) has three main elements: the input terminals on the right, the display and the press keys. The press keys are used to select major functions, function modifiers, and ranging operations. These elements are described in detail in Section 3.
Figure 2 –1 The rear panel (shown in Figure 2-2) includes a power switch, a power selection switch, a 0.2A/250V fuses, a power interface, a communication interface, and an instrument factory number label.
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Figure 2–2 Adjusting the Handle
The handle can be positioned to provide four different viewing angles. To adjust its position, pull the ends out to a hard stop and rotate it to a position. To remove the handle, adjust it to the vertical stop position and pull the ends all the way out. See Figure 2–3.
Handle position 1- instrument flat wise Handle position 2-support fixed elevation, convenient for use Handle position 3-lift up the instrument Handle position 4-dismantle position for the hand shake
Figure 2–3 Power
Warning TO AVOID SHOCK HAZARD, CONNECT THE INSTRUMENT POWER CORD TO A POWER
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RECEPTACLE WITH EARTH GROUND. Caution
Apply the rated voltage and frequency to the meter as marked on the rear panel of the meter. Please confirm that the power selection switch is in the right place. When your area is 110V city electricity, please switch the power selection switch down to show 110V or 115V; when your area is 220V please switch the power selection switch upwards, showing 220V or 230V. Turning the Meter On Open the power switch on the back panel and turn on the multimeter. If you turn the meter off, you must wait for five seconds before turning the meter back on. If you do not, the meter will not power-on. When the meter is turned on, the full screen displays light while the instrument performs an internal selftest of its digital circuitry. These 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-on sequence, it assumes the power-on measurement configuration stored in non-volatile memory. The power-up configuration set at the factory is shown in Table 3-6. (To change the power-on configuration, refer to “CHANGING THE POWER-ON CONFIGURATION” in Section 3.) Using the Press Keys The press keys on the front panel select meter functions and operations. A summary of basic press key operations is shown in Figure 2-4.
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Figure 2–4 Press keys can be used in two ways. You can: Press a single key to select a function or operation. EXAMPLE: Press ACV to select volts ac function. Press a combination of keys, 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 key, 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 “auto-range” or manually by the user. In
the auto-range mode, the meter selects the appropriate range for the measurement reading. To manually select a range, press AUTO key to toggle in (or out) of the manual ranging mode, or press
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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 “MULTI-METER 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 does 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 2-5. The meter will select the appropriate range in the autorange mode.
Figure 2–5
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Measuring Current To measure current, insert the red test lead in the mA input terminal for
currents up to 220mA or in the 10A input terminal for higher current, and insert the black test lead in the COM terminal. 1. Turn off the power of the current under tested, and connect the test leads as
shown in Figure 2–6. 2. Cut off the current (earth connection can minimize the common mode
rejection voltage), and connect the multi-meter to the current in series. 3. Turn on the current power, read the value displayed in the LCD, note that
the unit of the measured value displayed in the LCD should be in conformity with the input terminal. 4. Turn off the current power, and cut off the multi-meter from the measured current.
Figure 2–6
Caution 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.
Diode/Continuity Testing The continuity test determines whether a circuit is intact (i.e., has a resistance less than about 40). To
perform a continuity test, press , and connect the test leads as shown in Figure 2-7. The beeper emits a continuous beep when the input drops below 40 (Beep condition can be changed, refer to “Changing the Power-ON Configuration” later in Section 3), and the readings for the test circuit are displayed in the LCD.
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Figure 2–7 The diode test measures the forward voltage of a semiconductor junction at approximately 200uA. Readings are displayed in the 2V range at the fast measurement rates. “OL” is displayed for voltages above 2.0V. Under normal measurement condition, the negative pole of diode is connected with the black COM test lead. To perform a diode or transistor junction test, press to select the diode function. Then connect the test leads across the diode as shown in Figure 2-8. Notice how the test leads are placed. Reversing the polarity will reverse-bias the diode.
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Figure 2–8 Communication Interface
The real time measured value can be transmitted to the computer by the devote USB cable and the DMMVIEW software (refer to SECTION 3 “CONNECT WITH THE USB PORT OF COMPUTER).
SECTION 3
OPERATING THE METER FROM THE FRONT PANEL Introduction
This section explains how to operate the meter from the front panel. Front Panel Operations
The following operations can be performed from the front panel: Select a measurement function DCV DC voltage measurement ACVAC voltage measurement DCA
DC current measurementACA AC current measurement resistance measurementFREQ frequency measurementCAP capacity measurement diode measurement continuity measurementTEMP temperature measurement Select function modifiers REL , MNMX that cause the meter to display relative readings, maximum, minimum or average values Enter the Touch Hold mode (HOLD) to hold a reading on the display Set Measurement Rate (RATE), change the rate as “F”(Fast) or “S”(Slow) Select the manual or autorange mode (AUTO), up range or down range manually to desired range Back light operation key , to turn on or turn off the back light (when arrive the setting time the back light can automatically off) Power-on or off the power supply (POWER) These operations are described in detail in the following part of Section 3.
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Display The meter has a 5-digit, Liquid Crystal Display (Main Display) and a 4-digit, Liquid Crystal Display
(Auxiliary Display). The display shows measurement readings, measurement units and messages. As shown in Figure 3-1.
Figure
Input front
3–1
Figure 3–2
Terminals The input terminals, as shown in Figure 3-2, are located on the right of the panel: The meter is protected against overloads up to the limits shown in Table 3-1.
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Exceeding these limits poses a hazard to both the meter and operator.
Table 3-1 Input Limits
Function
Input Terminals
Maximum Input
DC voltage
V and COM
1000V dc
AC voltage
V and COM
750V ac rms, 1000V peak value
DC and AC miliampere DC and AC Ampere Frequency Resistance Diode All functions
mA and COM 10A and COM V and COM V and COM V and COM any terminal to earth
200mA dc or ac rms 10A dc or ac rms 400V ac rms,600V peak value 250V dc or ac rms on all ranges 250V dc or ac rms on all ranges 1000V dc or ac peak value
Selecting a Measurement Function
Press a function key, 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.
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Function DC/AC voltage
DC/AC voltage mA DC/AC voltage A
Resistance
Figure 3–3 Table 3–2 Measurement Range and Full Scale Value
Range
Full Scale Value
Description
200mV 2V 20V
200 V 1000V* 0.2mA 2 mA 20 mA 200mA
10A 200 2K 20 K 200 K 2M
220.00mV 2.2000V 22.000 V 220.00 V 1100.0 V* 0.22000 mA 2.2000 mA 22.000 mA 220.00 mA 11.000A 220.00 2.2000 K 22.000 K 220.00 K 2.2000 M
*750 V ac rms
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Capacity Frequency
20 M 60 M 10nF 100nF 1000nF 10uF 100uF 1000uF 10Hz 100Hz
1000Hz
10KHz
100KHz
1000K Hz
10MHz
22.000 M 60 M 11.00nF 110.0nF 1100nF 11.00µF 110.0µF 1100µF
9.9000Hz 99.000 Hz
999.00Hz
9.9000KHz
99.000K Hz
999.00K Hz
9.9000M Hz
10MHz range have no full scale value
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Selecting Range Ranging operations are performed using the AUTO , , keys (see Figure 3-4).
Figure 3–4 Auto-ranging AUTO
When the meter enters into the autorange mode, the “AUTO” annunciator is lit. In autorange mode, the meter automatically selects the next higher range when a reading is greater than full scale. If no higher range is available, “OL” (overload) is displayed. The meter automatically selects a lower range when a reading is less than approximately 10% of the selected range. Manual Ranging , Press AUTO key to toggle in and out of manual ranging. The range you are in when you enter the manual range mode becomes the selected range. In manual range, the meter remains in the selected range regardless of input. Press AUTO key to toggle back to autoranging. Press key to up range. If the key is pressed when the meter is still in autorange, manual ranging is selected, the “AUTO” annunciator turns off, and the next higher range is selected (if there is one). Press key to down range. If the key is pressed when the meter is still in autorange, manual ranging is selected, the “AUTO” annunciator turns off, and the next lower range is selected (if there is one).
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When the meter is in DCVACVDCAACAFREQ or CAP measurement function, the selected range is displayed on the auxiliary display.
Measuring Frequency FREQ Press the FREQ key to select the digital frequency function, the frequency is displayed on the main display
and the selected range is displayed on the auxiliary display. Select the rang manually or automatically Frequency Measurement Rates
The rate at which frequency measurements are taken is selected by the meter automatically, when the frequency function has been selected, press RATE has no effect on the frequency update rate. Frequency Sensitivity Selection
Before a frequency measurement is started, the amplitude of the input signal is sampled and the optimum ac voltage range is selected automatically. For more information refer to the Section 6 for ac voltage sensitivity.
The input signal sensitivity is based on sine waveforms. 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, HOLD, MNMX)
Figure 3–5
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Selecting a function modifier causes the meter to perform an action on an input (e.g., convert to relative reading mode or compare to another value) before a reading is displayed. To use a function modifier, press a function key to select a primary function (including six basic functions of DCV, DCA, OHM, ACV, ACA, and CAP), and then press a function modifier key. See Figure 3-5.
REL (Relative Readings) Modifier Press REL key to select the relative modifier. When the relative modifier is selected: the last valid reading
is stored as the relative base and displayed on the auxiliary display. The reading on the main display is always the difference between the relative base and an input measurement, and the “” annunciator turn on. Namely:
Relative Value= present measured value reference base For example, if the relative base is 15.000V, and the present reading is 14.100V, the main display will show -0.900V.
Warning
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 again, the relative base is displayed on the auxiliary display. The reading on the main display is
REL%, and the “%” annunciator turn on simultaneous ( in the beginning part, and % annunciator in the last part). Namely:
REL%=
present reading-relative base relative base
×100%
For example, if the relative base is 15.000V, and the present reading is 14.100V, the main display will show -6%. Press REL again to exit the relative modifier.
Caution
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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 keys 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. MNMX (MN MX AVG) Modifier The meter will store the minimum and maximum inputs measured when the MN MX AVG modifier is selected. Press MN MX to select the “MNMX” modifier. When the “MNMX” 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 main display, the beeper emits a single beep. Press MNMX again to display the minimum reading and the “MIN” annunciator lights, once the minimum value showed on the main display, the beeper emits a single beep. Press MNMX again to display the average reading on the main display (“AVG” annunciator lights). Each subsequent press of the MNMX key toggles among the maximum, minimum and average value. The measurement reading displayed on the auxiliary display. To exit the MNMX modifier, press and hold down the MN MX key for two seconds or press other function keys. Selecting the MNMX modifier turns off autoranging and locks in the present range. Make sure you are in the correct range before selecting the MN MX modifier.
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Table 3-5 Function Modifier and Measurement Function
FUN Modifier Function
REL
HOLD
MNMX
DCV ACV DCA ACA
CAP FREQ
Selecting a Measurement RateRATE The meter takes measurements at one of two, user-selectable rates: slow and fast. The rate selected is
indicated by “S”, “F” on the display. Press the RATE to change the measurement rates at “S” or “F”. The selected rate applies to the basic
measurement of DCV, DCA, , ACV, ACA.
Connect with the USB Port of Computer Plug one end of the devote USB cable to the communication connector on the real panel, plug the other end
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of the cable to the USB port of the computer, running the devote DMMVIEW_F figure restoring software, set the corresponding connector port to achieve online. When success, the COMM annunciator is lit on, the instrument transmits measured value and state to computer, thus, the computer can remote Control, display, record, Data Analysis, print all the measurement process. use the DMMVIEW_F figure restoring software stop the communication, the instrument stop transmit measured value and the COMM annunciator disappears
Power-on Configuration Factory Setting of Power-on Configuration:When the meter is turned on and completes the power-on
sequence, it assumes its power-on configuration. The power-on configuration set at the factory is shown in Table 3-6.
Table 3-6 Power-on Configuration Set at Factory
Parameter
Configurations
Remark
Function Setting Range
Reading Rate
DC voltageDCV Autorange/AUTO
SlowS
Reference Value of Relative Base Value
0
Minimum/Maximum/Average
0
Back Light Time Continuity beep
0000 S continuous beep
changeable changeable
Changing the Power-on Configuration You can change the power-on configuration to one that more closely meet your needs and preferences in
maintenance mode. The operation is shown as follows:
Entering Maintenance State After turning the meter on, press the Config to enter into maintenance state.
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1. Change Back Light Time Press AUTO, when “bLOFF” is annunciator showed on the main display. The value of setting is showed on the auxiliary display, then press or to step up or down the setting value with 60s. The limit of the setting value is 1 hour (3600s), when the setting value is “0000” indicates that back light will not be turned off automatically and only press the key could turn off the back light. Press the HOLD save the set value, the “SAVE” annunciator is lit on , indicating successful storage.
2. Change Temperature Display Unit Press AUTO, when `TEP-U’annunciator is showed on the main display, the Display Unit is showed on the auxiliary display, then press or to change display unit, the setting value is C or F. Press the HOLD save the set value, the “SAVE” annunciator is lit on , indicating successful storage.
3. Change the continuity beep mode Press AUTO key, when “BEEP” annunciator is showed on the main display, the “YES”(connect beep) or “NO”(disconnect beep) is showed on the auxiliary display. Press the HOLD save the set value, the “SAVE” annunciator is lit on, indicating successful storage.
4. Factory set Press AUTO, when “FACTY” annunciator is showed on the main display, select the default factory set. To resume the factory set, Press the HOLD save the default value. Press the Config to exit factory set mode.
SECTION 4 MAINTENANCE
Caution When servicing the meter, use only the replacement parts specified
Introduction Section 4 provides the information necessary for the user to perform basic maintenance. Users should not
attempt to perform maintenance not described in this section. Qualified service personnel should refer to this
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Manual for complete maintenance and calibration service.
Warning 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 WATER OR A MILD DETERGENT. DO NOT USE AROMATIC HYDROCARBONS, CHLORINATED SOLVENTS, OR METHANOL-BASED FLUIDS WHEN WIPING DOWN THE METER. Replacing the Line Fuse
Warning OPENING THE CASE MAY EXPOSE HAZARDOUS VOLTAGES. ALWAYS DISCONNECT THE POWER CORD AND MEASURING INPUTS BEFORE OPENING THE CASE. 1. Use a screwdriver to remove the clamp seat insurance from power socket. 2. The fuse holder clamping the insurance tube, multimeter power using a 0.2A/250V (slow blow fuse). 3. The insurance will reload the gland into a power socket. Replacing the Current Input Fuses 200mA (include 200mA) and 10A inputs are protected by user-replaceable fuses. The 200mA input is protected by a fuse rated at 200mA, 250V (Fast blow). The 10A input is protected by a fuse rated at 11A, 250V (Fast blow). Testing Current Input Fuses Perform the following procedure to test these fuses: 1. Short the V, , input terminal and the mA terminal with a test lead. 2. Press to select the ohms function. Insert the test lead probe into the mA input terminal. If the fuse is
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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 fuse
is good, the meter will read between 0.00 and 0.05. If the fuse is blown, the meter will read >10M to OL. Replacing the Current Input Fuses
Warning FOR PROTECTION AGAINST FIRE, REPLACE A BLOWN FUSE ONLY WITH ONE OF IDENTICAL The input fuse is mounted on the input socket on the front panel (see Figure 4-1). To replace the fuse, first pull out the power connection line and test the input line, then remove the measuring terminal cover from the side of the instrument panel, replace the fuse fuse with the same fuse, and then reload the measuring terminal cover.
Figure 4-1
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SECTION 5
SPECIFICATIONS
Introduction This Section contains the specifications of the Dual Display Multi-meter. These specifications assume: A 1-year calibration cycle An operating temperature of 18 to 28 (64.4~82.4) One-hour warm-up Slow reading rate Relative humidity not exceeding 70% (non-condensing) Accuracy is expressed as ± (percentage of reading + digits).
Reading Rates
DC VoltageDCV Range 200mV 2V 20 V 200 V
Rate SlowS FastF
Resolution 10uV 100 uV 1 mV 10 mV
Readings per Second 3 20
Accuracy 0.05%+4 0.05%+4 0.05%+4 0.05%+4
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1000V
100 mV
0.1%+4
Input Impedance: 200mV range >100M and 10M at other ranges. Normal Mode Rejection Ratio (NMR):80dB (at 50Hz or 60Hz 1K unbalanced resistance) Common Mode Rejection Ratio (CMR): 120dB (at 50Hz or 60Hz) Maximum Input Voltage:1000V peak
TRUE RMS AC VOLTAGE, AC-COUPLED
Range Resolution 200mV 10uV
2V
100 uV
45~400Hz 1%+40 0.5%+40
400Hz~1KHz 3%+40 3%+40
20V
1 mV
0.5%+40
200V 750V
10 mV 100 mV
0.5%+40 1%+40
Remark: Accuracy specifications apply to the range from 10% to 100%
Input Impedance: 200mV range >100M10 M at other ranges, less than 100pF Maximum Crest Factor: 3.0 Common Mode Rejection Ratio: >80 dB at 50Hz or 60Hz (1K unbalanced resistance) Maximum Input: 750V rms, 1000V peak.
DC CURRENT DCA
Range 0.2mA
Resolution 0.01uA
Accuracy 0.2%+20
Input Impedance 1000
2mA
0.1uA
0.2%+10
100
20mA
1uA
0.2%+10
10
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200mA
10uA
0.2%+10
10A
1mA
0.5%+20
Maximum Input :200mA. Protected with a 200mA, 250V fast blow fuse;
10A. Protected with a 10A, 250V fast blow fuse. for 30 seconds maximum.
1 0.01
TRUE RMS AC VOLTAGE, AC-COUPLED Range Resolution
Accuracy 45Hz~1KHz
0.2mA
0.01uA
0.8%+30
2mA
0.1uA
0.8%+30
20mA
1uA
0.8%+30
200mA
10uA
0.8%+30
10A
1mA
1.5%+20
Maximum Input: 200mA. Protected with a 200mA, 250V fast blow fuse; 10A. Protected with a 10A, 250V
fast blow fuse. for 30 seconds maximum Maximum Crest Factor: 3.0
ResistanceOHM
Range Resolution
200
10m
Accuracy 0.2%+10
Open Circuit Voltage About 2.3V
Short Circuit Current About 800uA
2K
100m
0.2%+5
About 2.3V
About 200uA
20K
1
0.2%+5
About 2.3V
About 24uA
200K
10
0.5%+5
About 2.3V
About 3uA
2M
100
0.6%+5
About 2.2V
About 0.1uA
20M
1K
1%+40
About 1.8V
About 0.1uA
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60M
10K
5%+20
About 1.8V
Maximum Input Voltage: 250V dc or RMS ac on all ranges
DIODE TEST /CONTINUITY
Range 2V
Measuring Scope 02.2000V
Resolution 0.0001V
600
0600.0
100m
CapacityCAP
Range
10nF 100nF 1000nF 10µF 100µF 1000µF
Measuring Scope
011.00nF 0110.0nF 01100nF 011.00µF 0110.0µF 01100µF
Resolution
0.01nF 0.1nF 1nF 0.01uF 0.1uF 1uF
About 0.1uA
Sensitivity 1%+10
About 40BB
Accuracy 5%+50 5%+5 5%+5 5%+5 5%+5 5%+50
FrequencyFREQ
Range 10Hz
100Hz 1000Hz 10KHz 100KHz
Resolution
0.0001Hz
0.001Hz 0.01Hz 0.1Hz
1Hz
Accuracy 0.02%+4
Sensitivity 200mV RMS
Remark
The reading is zero for
frequency less than 3Hz
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1000KHz 10MHz
TC Measurement
10Hz 100Hz
undesignated
Division No.
Measurement Scope
Resolution
Accuracy
K
-200.0C1372.0C -328.0F2501.6F
0.1C 0.1F
1. Comply with ITS-90 temperature standard.
2. Errors for RTD compensation are not included in the accuracy.
0.5%+5C 0.5%+5F
Environmental Conditions: Temperature Coefficient :
Operating Temperature :
Storage Temperature
:
Relative Humidity
:
<0.1 times the applicable accuracy specification per degree C for 5 to 18 and 28 to 40. 5 to 40 -25 to 50 90% at 5 to 28 (non-condensing) 80% at 28 to 40 70% at 10 to 40 for the 200K, 2M, 20M and 60M resistance ranges.
General Specifications: Common Mode Voltage: 1000V dc or peak ac maximum from any input to earth Size: 245×220×82(mm) Weight: about 2Kg Power: about 3VA
Accessories:
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A couple of test leads A power line cord A Users Manual or A Quick Reference Guide A disk A USB serial port communication wire
SECTION SIX Notes for the Manual
The present operation instruction is subject to change without notice. The content of the operation instruction is regarded as correct. Whenever any user finds its mistakes, omission, etc., he or she is requested to contact the manufacturer. The present manufacturer is not liable for any accident and hazard arising from any Mis-operation. The functions described in this operation instruction should not be used as grounds to apply this product to a particular purpose.
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Documents / Resources
 |
technica 8145C Dual Display Multi Meter [pdf] Instructions 8145C Dual Display Multi Meter, 8145C, Dual Display Multi Meter, Display Multi Meter, Multi Meter |