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Summary of Contents for Itm 885
- Page 1 Models 885 & 886 LCR METER OPERATING MANUAL MANUAL DE INSTRUCCIÓNES MEDIDOR LCR Modelos 885 & 886 1.800.561.8187 information@itm.com www. .com...
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Page 2: Table Of Contents
........... 28 CCESSORY PERATION APPLICATION ..............30 4.1 T ..........30 EADS ONNECTION 4.2 O .......... 35 HORT OMPENSATION 4.3 S ....37 ELECTING THE ERIES OR ARALLEL LIMITED THREE-YEAR WARRANTY ...... 37 SAFETY PRECAUTION ..........42 1.800.561.8187 information@itm.com www. .com... -
Page 3: Introduction
Components can be measured in the series or parallel mode as desired; the more standard method is automatically selected first but can be overridden. The Model 885 and 886 offers three useful modes for sorting components. The highly versatile Models can perform virtually all the functions of most bench type LCR bridges. - Page 4 Dual Liquid Crystal Display Fast/Slow Measurement Auto Range or Range Hold Open/Short Calibration Primary Parameters Display: : AC Impedance DCR : DC Resistance Ls : Serial Inductance Lp : Parallel Inductance 1.800.561.8187 information@itm.com www. .com...
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Page 5: Impedance Parameters
DC impedance and AC impedance. The common digital multi-meter can only measure the DC impedance, but the Model 885 can do both. It is a very important issue to understand the impedance parameters of the electronic component. - Page 6 Also, there are quality factor (Q) and the dissipation factor (D) that need to be discussed. For component, the quality factor serves as a measure of the reactance purity. In the real world, there is always 1.800.561.8187 information@itm.com www. .com...
- Page 7 δ ω ω ω ω There are two types of the circuit mode. One is series mode, the other is parallel mode. See Figure 1.2 to find out the relation of the series and parallel mode. 1.800.561.8187 information@itm.com www. .com...
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Page 8: Specification
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 to 9999 Ω 0.000 to 9999 0.000 to 9999 θ -180.0 ° to 180.0 ° 1.800.561.8187 information@itm.com www. .com... - Page 9 3.Ae multiplies 1.50 when the test level is set to 50mVrms. 4.When measuring L and C, multiply Ae by if the 1 Dx Dx＞0.1. : Ae is not specified if the test level is set to 50mV. 1.800.561.8187 information@itm.com www. .com...
- Page 10 0.5% ± 1 ± 1 ± 1 0.159 1.591 15.91 159.1 1.591 100KHz 1.591 15.91 159.1 1.591 15.91 (886) 5% ± 1 5% ± 1 2%± 1 0.4% 2%± 1 ± 1 1.800.561.8187 information@itm.com www. .com...
- Page 11 ± 1 ± 1 ± 1 31.83 15.91 1.591 159.1 15.91 1.591 100KHz 15.91 1.591 159.1 15.91 1.591 0.159 (886) 5% ± 1 5% ± 1 2%± 1 0.4% 2%± 1 ± 1 1.800.561.8187 information@itm.com www. .com...
- Page 12 10 ~ 1 1 ~ 0.1 100K Freq. (Ω) (Ω) (Ω) (Ω) (Ω) (Ω) ±1.046 ±0.523 ±0.261 ±0.105 ±0.261 ±0.523 100Hz 120Hz 1KHz ±2.615 ±1.046 10KHz ±2.615 ±1.046 ±0.209 ±1.046 ±2.615 100KHz (886) 1.800.561.8187 information@itm.com www. .com...
- Page 13 1 Dx Example: Test Condition: Frequency : 1KHz Level : 1Vrms Speed : Slow : 100nF Then π ⋅ ⋅ ⋅ Ω 1590 − π ⋅ ⋅ ⋅ ⋅ Refer to the accuracy table, get C =±0.2% 1.800.561.8187 information@itm.com www. .com...
- Page 14 Speed : Slow : 1mH Then π ⋅ ⋅ ⋅ − π ⋅ ⋅ ⋅ Ω Refer to the accuracy table, get L =±0.5% ESR Accuracy: ± ⋅ π ⋅ ⋅ ⋅ π ⋅ ⋅ ⋅ 1.800.561.8187 information@itm.com www. .com...
- Page 15 Frequency : 1KHz Level : 1Vrms Speed : Slow : 100nF Then π ⋅ ⋅ ⋅ Ω 1590 − π ⋅ ⋅ ⋅ ⋅ Refer to the accuracy table, get =±0.2%, ± ⋅ ± Ω D Accuracy: ± 1.800.561.8187 information@itm.com www. .com...
- Page 16 π ⋅ ⋅ ⋅ ⋅ Refer to the accuracy table, get =±0.2%, ⋅ ± ± Q Accuracy: ⋅ ± ⋅ = Ae of |Zx| Qx : Measured Quality Factor Value De : Relative D Accuracy 1.800.561.8187 information@itm.com www. .com...
- Page 17 ⋅ ⋅ ⋅ − π ⋅ ⋅ ⋅ Ω Refer to the accuracy table, get =±0.5%, ⋅ ± ± If measured Qx = 20 Then ⋅ ± ⋅ ± θ Accuracy: θ ⋅ π 1.800.561.8187 information@itm.com www. .com...
- Page 18 ⋅ ± π Testing Signal: : ± 5% Level Accuracy Frequency Accuracy : 0.1% Output Impedance : 100Ω ± 5% Measuring Speed: Fast 4.5 meas. / sec. Slow : 2.5 meas. / sec. 1.800.561.8187 information@itm.com www. .com...
- Page 19 1 KHz. Generally, inductors below 2mH should be measured at 1 kHz and inductors above 200H should be measured at 120Hz. It is best to check with the component manufacturers’ data sheet to determine the best test frequency for the device. 1.800.561.8187 information@itm.com www. .com...
- Page 20 10 pF per foot, After measuring the cable a capacitance reading of 1.000 nF is displayed. Dividing 1000pF (1.000 nF) by 10 pF per foot yields the length of the cable to be approximately 100 feet. 1.800.561.8187 information@itm.com www. .com...
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Page 21: Accessories
2 AA Size Ni-Mh Rechargeable Batteries 2 pc Shorting Bar 1 pc AC to DC Adapter 1 pc TL885A SMD Test Probe 1 pc TL885B 4-Wire Test Clip (Optional) TL08C Kelvin Clip (Optional) 1.800.561.8187 information@itm.com www. .com... - Page 22 Carrying Case (Optional) 1.800.561.8187 information@itm.com www. .com...
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Page 23: Operation
11. Display Update Speed Key 12. D/Q/θ/ESR Function Key 13. Range Hold Key 14. L/C/Z/DCR Function Key 15. Battery Charge Indicator 16. DC Adapter Input Jack 17. Guard Terminal 18. HPOT/HCUR Terminal 19. LPOT/LCUR Terminal 20. Battery Compartment 1.800.561.8187 information@itm.com www. .com... -
Page 24: 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 Models 885 & 886 should be replaced or recharged to maintain proper operation. Please perform the following steps to change the batteries: 1. -
Page 25: Battery Recharging/Ac Operation
To power the Model 885 with AC source, make sure that the Models 885 or 886 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 an AC outlet. -
Page 26: Open And Short Calibration
CAL key shortly (no more than two second), the LCD will display: This calibration takes about 10 seconds. After it is finished, the Model 885 will beep to show that the calibration is done. Short Calibration To perform the short calibration, insert the Shorting Bar into the measurement terminals. -
Page 27: Display Speed
2.2.4 Display Speed The Models 885 & 886 provides 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. -
Page 28: Dc Resistance Measurement
If the serial mode (Cs) is selected, the D, Q and ESR can be shown on the secondary display. If the parallel mode (Cp) is selected, only the D and Q can be shown on the secondary display. The following 1.800.561.8187 information@itm.com www. .com... -
Page 29: Inductance Measurement
If the parallel mode (Lp) is selected, only 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. 1.800.561.8187 information@itm.com www. .com... -
Page 30: Accessory Operation
2.3 Accessory Operation Follow the figures below to attach the test probes for making measurement. Shorting Bar TL885A SMD Test Probe 1.800.561.8187 information@itm.com www. .com... - Page 31 TL885B 4-Wire Test Clip TL08C Kelvin Clip 1.800.561.8187 information@itm.com www. .com...
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Page 32: Application
100Ω to 10KΩ. (a) CONNECTION (b) BLOCK DIAGRAM 1m 10m 100m 1 1K 10K 100K 1M (c) TYPICAL IMPEDANCE MEASUREMENT RANGE(£[) Figure 3.1 3-Terminal (3T) 1.800.561.8187 information@itm.com www. .com... - Page 33 (a) CONNECTION (b) BLOCK DIAGRAM 1m 10m 100m 1 1K 10K 100K 1M (c) TYPICAL IMPEDANCE MEASUREMENT RANGE(£[) (d) 2T CONNECTION WITH SHILDING Figure 3.2 4-Terminal (4T) 4-Terminal connection reduces the effect of the test lead 1.800.561.8187 information@itm.com www. .com...
- Page 34 5-Terminal connection is the combination of 3T and 4T (Figure 3.4). It has four coaxial cables. Due to the advantage of the 3T and 4T, this connection can widely increase the measurement range for 10mΩ to 10MΩ. 1.800.561.8187 information@itm.com www. .com...
- Page 35 Therefore, the magnetic flux that generated by internal conductor will cancel out the magnetic flux generated by external conductor (shield). The 4TP connection increases the 1.800.561.8187 information@itm.com www. .com...
- Page 36 DUT as well as the Ci and Ch. To correct this problem, add a guard plane (Figure 3.6(b)) in between H and L terminals to break the Cd. If the guard plane is connected to instrument guard, the effect of Ci and Ch will be removed. 1.800.561.8187 information@itm.com www. .com...
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Page 37: Open/Short Compensation
(Figure 3.7(b)). When the DUT is short, the instrument gets the impedance Zs = Rs + jωLs (Figure 3.7(c)). After the open and short compensation, Yp and Zs are for calculating the real Zdut (Figure 3.7(d)). 1.800.561.8187 information@itm.com www. .com... - Page 38 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 1.800.561.8187 information@itm.com www. .com...
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Page 39: Selecting The Series Or Parallel Mode
Rp is more important than the Rs. If the capacitor is large, the Rs shouldn’t be avoided. Hence, uses parallel mode to measure low capacitor and series mode to measure high capacitor. 1.800.561.8187 information@itm.com www. .com... - Page 40 If the inductor is small, the Rs is more important than the Rp. If the inductor is large, the Rp should be taking care of. So, uses series mode to measure low inductor and parallel mode to measure high inductor. 1.800.561.8187 information@itm.com www. .com...
- Page 41 Small inductor Large inductor (Low impedance) (High impedance) No Effect Effect Effect No Effect Figure 3.9 1.800.561.8187 information@itm.com www. .com...
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Page 42: Limited Three-Year Warranty
Some states do not allow limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific rights and you may have other rights, which vary from state-to-state. 1.800.561.8187 information@itm.com www. .com... - Page 43 The flat-rate repair charge includes return shipping to locations in North America. For overnight shipments and non-North America shipping fees contact B&K Precision Corp.. Include with the instrument your complete return shipping address, contact name, phone number and description of problem. 1.800.561.8187 information@itm.com www. .com...
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Page 44: Safety Precaution
6. Safety Precaution SAFETY CONSIDERATIONS The Models 885 & 886 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 45 Return the instrument to a qualified dealer for service and repair to ensure that safety features are maintained. INSTRUMENTS WHICH APPEAR DAMAGED OR DEFECTIVE SHOULD NOT BE USED! PLEASE CONTACT B&K PRECISION FOR INFORMATION ON REPAIRS. 1.800.561.8187 information@itm.com www. .com...
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