Motech MT 4080 Operating Manual
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Motech MT 4080 Operating Manual

Motech MT 4080 Operating Manual

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MT 4080
LCR METER
OPERATING MANUAL

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Summary of Contents for Motech MT 4080

  • Page 1 MT 4080 LCR METER OPERATING MANUAL...

  • Page 2: Table Of Contents

    Contents INTRODUCTION ............. 1 1.1 G ................1 ENERAL 1.2 I ..........3 MPEDANCE ARAMETERS 1.3 S ..............6 PECIFICATION 1.4 A ..............19 CCESSORIES OPERATION ..............20 2.1 P ..........20 HYSICAL ESCRIPTION 2.2 M ..........21 AKING EASUREMENT 2.2.1 Battery Replacement...............21 2.2.2...

  • Page 3: Introduction

    1. Introduction 1.1 General The MT4080 is a high accuracy handheld LCR meter that can perform the inductor, capacitor and resistor measurement up to 100KHz within 0.2% basic accuracy. It is the most advanced handheld AC/DC impedance measurement instrument to date. The MT4080 can help engineers and students to understand the characteristic of electronics components.
  • Page 4 Batteries. The instrument has applications in electronic engineering labs, production facilities, service shops, and schools. It can be used to check ESR values of capacitors, sort values, select precision values, measure unmarked and unknown inductors, capacitors or resistors, and to measure capacitance, inductance, or resistance of cables, switches, circuit board foils, etc.

  • Page 5: Impedance Parameters

    Second Parameter Display: θ : Phase Angle ESR : Equivalence Serial Resistance : Dissipation Factor : Quality Factor Combinations of Display: Serial Mode : Z –θ, Cs – D, Cs – Q, Cs – ESR, Ls – D, Ls – Q, Ls – ESR Parallel Mode : Cp –...
  • Page 6 Imaginary Axis θ Real Axis Figure 1.1 θ ∠ Ω θ   θ θ     −   Impedance Resistance Reactance Ω There are two different types of reactance: Inductive (X ) and Capacitive (X ). It can be defined as follows: ω...
  • Page 7 some associated resistance that dissipates power, decreasing the amount of energy that can be recovered. The quality factor can be defined as the ratio of the stored energy (reactance) and the dissipated energy (resistance). Q is generally used for inductors and D for capacitors.

  • Page 8: Specification

    Real and imaginary components are serial Real and imaginary components are Parallel G=1/R jB=1/jX Figure 1.2 Specification LCD Display Range: Parameter Range 0.000 Ω to 9999 MΩ 0.000 µH to 9999 H 0.000 pF to 9999 F 0.000 Ω to 9999 MΩ 0.000 Ω...
  • Page 9 Accuracy (Ae): Z Accuracy: |Zx| 20M ~ 10M ~ 1M ~ 100K ~ 10 ~ 1 1 ~ 0.1 100K Freq. (Ω) (Ω) (Ω) (Ω) (Ω) (Ω) 2% ±1 1% ±1 0.5% ± 0.2% ± 0.5% ± 1% ±1 100Hz 120Hz 1KHz 10KHz...
  • Page 10 C Accuracy : 79.57 159.1 1.591 15.91 159.1 1591 pF | 100Hz 159.1 1.591 15.91 159.1 1591 15.91 2% ± 1 1% ± 1 1% ± 1 0.5% 0.2% 0.5% ± 1 ± 1 ± 1 66.31 132.6 1.326 13.26 132.6 1326 120Hz...
  • Page 11 L Accuracy : 31.83 15.91 1591 159.1 15.91 1.591 100Hz 15.91 1591 159.1 15.91 1.591 159.1 2% ± 1 1% ± 1 1% ± 1 0.5% 0.2% 0.5% ± 1 ± 1 ± 1 26.52 13.26 1326 132.6 13.26 1.326 120Hz 13.26 1326...
  • Page 12 D Accuracy : |Zx| 20M ~ 10M ~ 1M ~ 100K ~ 10 ~ 1 1 ~ 0.1 100K Freq. (Ω) (Ω) (Ω) (Ω) (Ω) (Ω) ±0.020 ±0.010 ±0.005 ±0.002 ±0.005 ±0.010 100Hz 120Hz 1KHz ±0.050 ±0.020 10KHz 100KHz ±0.050 ±0.020 ±0.004 ±0.020...
  • Page 13 Z Accuracy: As shown in table 1. C Accuracy: π ⋅ ⋅ ⋅ = Ae of |Zx| : Test Frequency (Hz) Cx : Measured Capacitance Value (F) |Zx| : Measured Impedance Value (Ω) Accuracy applies when Dx (measured D value) ≦ 0.1 When Dx >...
  • Page 14 L Accuracy: π ⋅ ⋅ ⋅ = Ae of |Zx| : Test Frequency (Hz) Lx : Measured Inductance Value (H) |Zx| : Measured Impedance Value (Ω) Accuracy applies when Dx (measured D value) ≦ 0.1 When Dx > 0.1, multiply L 1 Dx Example: Test Condition:...
  • Page 15 = Ae of |Zx| : Test Frequency (Hz) Xx : Measured Reactance Value (Ω) Lx : Measured Inductance Value (H) Cx : Measured Capacitance Value (F) Accuracy applies when Dx (measured D value) ≦ 0.1 Example: Test Condition: Frequency : 1KHz Level : 1Vrms Speed...
  • Page 16 = Ae of |Zx| Accuracy applies when Dx (measured D value) ≦ 0.1 When Dx > 0.1, multiply Dx by (1+Dx) Example: Test Condition: Frequency : 1KHz Level : 1Vrms Speed : Slow : 100nF Then π ⋅ ⋅ ⋅ Ω...
  • Page 17 Accuracy applies when ⋅ De < Example: Test Condition: Frequency : 1KHz Level : 1Vrms Speed : Slow : 1mH Then π ⋅ ⋅ ⋅ − π ⋅ ⋅ ⋅ Ω Refer to the accuracy table, get =±0.5%, ⋅ ± ±...
  • Page 18 Example: Test Condition: Frequency : 1KHz Level : 1Vrms Speed : Slow : 100nF Then π ⋅ ⋅ ⋅ Ω 1590 − π ⋅ ⋅ ⋅ ⋅ Refer to the accuracy table, get =±0.2%, θ ± ⋅ π ± ⋅ ±...
  • Page 19 General: Temperature 0°C to 70°C (Operating) -20°C to 70°C (Storage) Relative Humidity Up to 85% Battery Type 2 AA size Ni-Mh or Alkaline Battery Charge Constant current 150mA approximately Battery Operating Time : 2.5 Hours typical AC Operation 110/220V AC, 60/50Hz with proper adapter Low Power Warning under 2.2V...
  • Page 20 Charged Capacitors. Always discharge any capacitor prior to making a measurement since a charged capacitor may seriously damage the meter. Effect Of High D on Accuracy. A low D (Dissipation Factor) reading is desirable. Electrolytic capacitors inherently have a higher dissipation factor due to their normally high internal leakage characteristics.

  • Page 21: Accessories

    The series equivalent mode is essential for obtaining an accurate Q reading of low Q inductors. Where ohmic losses are most significant, the series equivalent mode is preferred. However, there are cases where the parallel equivalent mode may be more appropriate.

  • Page 22: Operation

    2. Operation 2.1 Physical Description UARD UARD 1. Infrared Port 2. Primary Parameter Display 3. Secondary Parameter Display 4. Low Battery Indicator 5. Model Number 6. Power Switch 7. Relative Key 8. Measurement Level Key 9. Open/Short Calibration Key 10. Measurement Frequency Key 12.

  • Page 23: Making Measurement

    2.2 Making Measurement 2.2.1 Battery Replacement When the LOW BATTERY INDICATOR lights up during normal operation, the batteries in the MT4080 should be replaced or recharged to maintain proper operation. Please perform the following steps to change the batteries: 1. Remove the battery hatch by unscrewing the screw of the battery compartment.

  • Page 24: Battery Recharging/Ac Operation

    2.2.2 Battery Recharging/AC operation Caution Only the MT4080 standard accessory AC to DC adapter can be used with MT4080. Other battery eliminator or charger may result in damage to MT4080. The MT4080 works on external AC power or internal batteries. To power the MT4080 with AC source, make sure that the MT4080 is off, then plug one end of the AC to DC adapter into the DC jack on the right side of the instrument and the other end into...

  • Page 25: Open And Short Calibration

    2.2.3 Open and Short Calibration The MT4080 provides open/short calibration capability so the user can get better accuracy in measuring high and low impedance. We recommend that the user performs open/short calibration if the test level or frequency have been changed. Open Calibration First, remaining the measurement terminals at the open status.

  • Page 26: Display Speed

    2.2.4 Display Speed The MT4080 provide two different display speeds (Fast/Slow). It is controlled by the Speed key. When the speed is set to fast, the display will update 4.5 readings every second. When the speed is set to slow, it’s only 2.5 readings per second. 2.2.5 Relative Mode The relative mode lets the user to make quick sort of a bunch of components.

  • Page 27: Dc Resistance Measurement

    2.2.7 DC Resistance Measurement The DC resistance measurement measures the resistance of an unknown component by 1VDC. Select the L/C/Z/DCR key to make the DCR measurement. The LCD display: 2.2.8 AC Impedance Measurement The AC impedance measurement measures the Z of an unknown device.

  • Page 28: Inductance Measurement

    the D and Q can be shown on the secondary display. The following shows some examples of capacitance measurement: The testing level and frequency can by selected by pressing the Level key and Frequency key, respectively. 2.2.10 Inductance Measurement Select the L/C/Z/DCR key to Ls or Lp mode for measuring the inductance in serial mode or parallel mode.

  • Page 29: Accessory Operation

    2.3 Accessory Operation Follow the figures below to attach the test probes for making measurement. Shorting Bar TL08A SMD Test Probe...
  • Page 30 TL08B 4-Wire Test Clip TL08C Kelvin Clip...

  • Page 31: Infrared Operation

    LCD as well as output to the infrared port. By this way, the user can purchase the optional application program provided by Motech to obtain the GO/NO GO comparator and the component sorting comparator.

  • Page 32: Command Syntax

    3.1 Command Syntax The command syntax of MT4080 is as following: COMMAND(?) (PARAMETER) The format of COMMAND and PARAMETER is as following: 1. There is at least one space between COMMAND and PARAMETER. 2. The PARAMETER should use only ASCII string not numerical code.

  • Page 33: Commands

    3.2 Commands Measurement Setting (or Querying) Command There are 17 measurement setting (or querying) commands. They are as following: DCR(?) DC resistance measurement mode setting or querying command. CpRp(?) Parallel capacitance and parallel resistance measurement mode setting or querying command. CpQ(?) Parallel capacitance...
  • Page 34 MT4080. The return value has four fields separated by comma (,). The total length will not greater than 100 characters. The four fields are: 1. Manufacturer Name 2. Model Number 3. Serial Number 4. Firmware Number Example: MOTECH,MT4080A,123456789,4.096...
  • Page 35 *RST Resets the MT4080 to the power on default status. The default status is: 1KHz 1Vrms SLOW CpD uF mH Ohm After the MT4080 is reset, it will beep once and returns the “BEEP” string back. Sets the format of the return value. This command sets the ASCII string return or the numerical code.
  • Page 36 FREQ(?) PARAMETER Sets (queries) the measurement frequency. FREQ PARAMETER Sets the measurement frequency according to the parameter. There is no return value. PARAMETER: ASCII string Numerical code 100Hz 120Hz 1KHz 10KHz 100KHz Example: FREQ 100KHz FREQ? Returns the current measurement frequency setting. Example: ASC ON FREQ?
  • Page 37 PARAMETER: ASCII string Numerical code 1VDC 1Vrms 250mVrms 50mVrms Example: LEV 1V LEV? Returns the current measurement level setting. Example: ASC ON LEV? 1Vrms (return value) ASC OFF LEV? 1 (return value) MODE? Queries the measurement mode. Six fields will be returned. 1.
  • Page 38 Example: ASC ON MODE? 1KHz 1Vrms SLOW CpD uF (return value) ASC ON CPRP MODE? 1KHz 1Vrms SLOW CpRp uF Ohm (return value) RANG(?) PARAMETER Sets (queries) the measurement unit. RANG PARAMETER Sets the measurement unit according to the parameter. There is no return value.
  • Page 39 RANG? Returns the current measurement unit setting. Example: ASC ON RANG? pF (return value) ASC OFF RANG? 0 (return value) READ? Returns the measurement value. This command will perform a measurement according to the current measurement mode and return the measured value. Example: READ? 0.22724 0.12840 (return value)
  • Page 40 SPEED(?) PARAMETER Sets (queries) the measurement speed. SPEED PARAMETER Sets the measurement speed according to the parameter. There is no return value. PARAMETER: ASCII string Numerical code SLOW FAST Example: SPEED FAST SPEED? Returns the current measurement speed setting. Example: ASC ON SPEED? SLOW (return value)

  • Page 41: Application

    4. Application 4.1 Test Leads Connection Auto balancing bridge has four terminals (H ) to connect to the device under test (DUT). It is important to understand what connection method will affect the measurement accuracy. 2-Terminal (2T) 2-Terminal is the easiest way to connect the DUT, but it contents many errors that are the inductor and resistor as well as the parasitic capacitor of the test leads (Figure 3.1).
  • Page 42 3-Terminal (3T) 3-Terminal uses coaxial cable to reduce the effect of the parasitic capacitor (Figure 3.2). The shield of the coaxial cable should connect to guard of the instrument to increase the measurement range up to 10MΩ. Co doesn't effect measurement result (a) CONNECTION...
  • Page 43 4-Terminal (4T) 4-Terminal connection reduces the effect of the test lead resistance (Figure 3.3). This connection can improve the measurement range down to 10mΩ. However, the effect of the test lead inductance can’t be eliminated. (a) CONNECTION (b) BLOCK DIAGRAM 1m 10m 100m 1 1K 10K 100K 1M (c) TYPICAL IMPEDANCE MEASUREMENT RANGE (£[)
  • Page 44 (a) CONNECTION (b) BLOCK DIAGRAM 1m 10m 100m 1 1K 10K 100K 1M (c) TYPICAL IMPEDANCE MEASUREMENT RANGE (£[) (d) WRONG 4T CONNECTION Figure 3.4 4-Terminal Path (4TP) 4-Terminal Path connection solves the problem that caused by the test lead inductance. 4TP uses four coaxial cables to isolate the current path and the voltage sense cable (Figure 3.5).
  • Page 45 external conductor (shield). The 4TP connection increases the measurement range from 1mΩ to 10MΩ. (a) CONNECTION (b) BLOCK DIAGRAM 1m 10m100m 1 1K 10K 100K 1M (c) TYPICAL IMPEDANCE (d) 4T CONNECTION WITH SHILDING MEASUREMENT RANGE(£[) Figure 3.5 Eliminating the Effect of the Parasitic Capacitor When measuring the high impedance component (i.e.

  • Page 46: Open/Short Compensation

    Guard Plant Connection Point Ground (b) Guard Plant reduces (a) Parastic Effect Parastic Effect Figure 3.6 4.2 Open/Short Compensation For those precision impedance measuring instrument, the open and short compensation need to be used to reduce the parasitic effect of the test fixture.
  • Page 47 Parastic of the Test Fixture Redundant Parastic Impedance Conductance Zdut (a) Parastic Effect of the Test Fixture OPEN + j£sC + j£s<< +j£sC (b) OPEN Measurement SHORT + j£sL (c) SHORT Measurement Figure 3.7...

  • Page 48: Selecting The Series Or Parallel Mode

    Zdut Zdut = 1-(Z (d) Compensation Equation Figure 3.7 (Continued) 4.3 Selecting the Series or Parallel Mode According to different measuring requirement, there are series and parallel modes to describe the measurement result. It is depending on the high or low impedance value to decide what mode to be used.
  • Page 49 Small capacitor Large capacitor (Low impedance) (High impedance) No Effect Effect No Effect Effect Figure 3.8 Inductor The impedance and inductive in the inductor are positively proportional. Therefore, the large inductor equals to the high impedance and vice versa. Figure 3.9 shows the equivalent circuit of inductor.
  • Page 50 Small inductor Large inductor (Low impedance) (High impedance) No Effect Effect Effect No Effect Figure 3.9...

  • Page 51: Warranty Information

    If any defect is discovered within the warranty period, MOTECH will repair or replace the unit, subject to verification of the defect or malfunction, upon delivery or prepaid shipment to MOTECH.
  • Page 52 The warranty is in lieu of all other agreements and warranties, general or special, express or implied no representative or person is authorized to assume for us any other liability in connection with the sale or use of this MOTECH product.

  • Page 53: Safety Precaution

    6. Safety Precaution SAFETY CONSIDERATIONS The MT4080 LCR Meter has been designed and tested according to Class 1A 1B or 2 according to IEC479-1 and IEC 721-3-3, Safety requirement for Electronic Measuring Apparatus. SAFETY PRECAUTIONS SAFETY NOTES The following general safety precautions must be observed during all phases of operation, service, and repair of this instrument.
  • Page 54 SAFETY SYMBOLS Caution, risk of electric shock Earth ground symbol Equipment protected throughout by double insulation or reinforced insulation Caution (refer to accompanying documents) DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modification to the instrument.
  • Page 55 ZOM-408MT-1...

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