IET Labs DE-5000 Troubleshooting guide

♦ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT ♦
TEL: [phone] • [phone] • FAX: [phone]
www.ietlabs.com
534 Main Street, Westbury, NY 11590
IET LABS, INC.
DE-5000
Portable, Full-Featured
LCR Meter
User and Service Manual

♦ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT ♦
TEL: [phone] • [phone] • FAX: [phone]
www.ietlabs.com
534 Main Street, Westbury, NY 11590
IET LABS, INC.
♦ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT ♦
TEL: [phone] • [phone] • FAX: [phone]
www.ietlabs.com
534 Main Street, Westbury, NY 11590
IET LABS, INC.
♦ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT ♦
TEL: [phone] • [phone] • FAX: [phone]
www.ietlabs.com
534 Main Street, Westbury, NY 11590
IET LABS, INC.

♦ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT ♦
TEL: [phone] • [phone] • FAX: [phone]
www.ietlabs.com
534 Main Street, Westbury, NY 11590
IET LABS, INC.
Copyright © 2011 IET Labs, Inc.
Visit www.ietlabs.com for manual revision updates
DE-5000 im/October 2011
DE-5000
Portable, Full-Featured
LCR Meter
User and Service Manual

♦ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT ♦
TEL: [phone] • [phone] • FAX: [phone]
www.ietlabs.com
534 Main Street, Westbury, NY 11590
IET LABS, INC.

♦ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT ♦
TEL: [phone] • [phone] • FAX: [phone]
www.ietlabs.com
534 Main Street, Westbury, NY 11590
IET LABS, INC.
WARRANTY
We warrant that this product is free from defects in material and workmanship and, when properly used,
will perform in accordance with applicable IET specifi cations. If within one year after original shipment,
it is found not to meet this standard, it will be repaired or, at the option of IET, replaced at no charge when
returned to IET. Changes in this product not approved by IET or application of voltages or currents greater
than those allowed by the specifi cations shall void this warranty. IET shall not be liable for any indirect,
special, or consequential damages, even if notice has been given to the possibility of such damages.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED,
INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR
FITNESS FOR ANY PARTICULAR PURPOSE.

WARNING
OBSERVE ALL SAFETY RULES
WHEN WORKING WITH HIGH VOLTAGES OR LINE VOLTAGES.
Dangerous voltages may be present inside this instrument. Do not open the case
Refer servicing to qualifi ed personnel
HIGH VOLTAGES MAY BE PRESENT AT THE TERMINALS OF THIS INSTRUMENT
WHENEVER HAZARDOUS VOLTAGES (> 45 V) ARE USED, TAKE ALL MEASURES TO
AVOID ACCIDENTAL CONTACT WITH ANY LIVE COMPONENTS.
USE MAXIMUM INSULATION AND MINIMIZE THE USE OF BARE
CONDUCTORS WHEN USING THIS INSTRUMENT.
Use extreme caution when working with bare conductors or bus bars.
WHEN WORKING WITH HIGH VOLTAGES, POST WARNING SIGNS AND
KEEP UNREQUIRED PERSONNEL SAFELY AWAY.
CAUTION
DO NOT APPLY ANY VOLTAGES OR CURRENTS TO THE TERMINALS OF THIS
INSTRUMENT IN EXCESS OF THE MAXIMUM LIMITS INDICATED ON
THE FRONT PANEL OR THE OPERATING GUIDE LABEL.

- iii -
Table of Contents
Chapter 1: Introduction .........................................................1
1.1. Overview ............................................................................1
1.2. Introduction to measuring principles..................................2
1.2.1. What is impedance ..........................................................2
1.2.2. Measuring impedance......................................................4
1.3. Equivalent circuit ...............................................................6
1.4. Instrument layout................................................................7
1.5. LCD display layout ..........................................................10
Chapter 2: Operation............................................................12
2.1. How to obtain optimum precision ....................................12
2.2. Default settings.................................................................12
2.3. Zeroing the meter .............................................................14
2.4. Attaching DUT’s to the meter ..........................................17
2.5. Primary measurements and functions...............................19
2.5.1. Measuring inductance, capacitance, and resistance .......19
2.5.2. Measuring dissipation, quality, ESR, and phase angle...22
2.5.3. Sorting components.......................................................24
2.5.4. Making relative measurements......................................26
2.6. Additional settings............................................................30
2.6.1. Selecting test frequency.................................................30
2.6.2. Making measurements in series and parallel .................32

- iv -
2.7. Additional features ...........................................................33
2.7.1. Connecting to a PC........................................................33
2.7.2. Using the backlight........................................................35
2.7.3. Holding a reading on the display...................................35
2.8. Replacing Batteries ..........................................................36
Chapter 3: Specifications......................................................37
3.1. General specifications ......................................................37
3.2. Accuracy specifications....................................................39
3.3. Ordering information........................................................42

- 1 -
Chapter 1: Introduction
1.1. Overview
The DE-500 is a portable, high-performance LCR meter that is
full-featured yet cost effective. It measures in true 4-wire Kelvin
mode and rivals the capabilities and options of many of its bench
counterparts. It measures:
Ls/Lp -- Series and parallel inductance
Cs/Cp -- Series and parallel capacitance
Rs/Rp -- Series and parallel resistance (ac)
Rdc/Rp -- Series and parallel resistance (dc)
ESR/Rp -- Series and parallel equivalent resistance
D-- Dissipation factor
Q-- Quality factor
Θ-- Phase angle
This LCR meter can transfer data to a PC via a standard, fully
isolated, optical IR-USB interface. It also features a Sorting
mode, allowing users to quickly sort components.
DE-5000 has automatic LCR selection. This allows the user to
measure the L/C/Rcomponents in Auto LCR mode without
having to select the type of measurement.

- 2 -
To accommodate various test requirements, the DE-5000 offers
selectable test frequencies: 100 Hz / 120 Hz / 1 kHz / 10 kHz /
100 kHz.
The unit is powered by a standard 9V battery. For additional
convenience, it may also use an optional ac adapter
(DE-5000-AC).
To transfer data to a PC, the unit comes with a built-in IR
interface. IET offers an optional Data Transfer Kit
(DE-5000-DTK). This kit includes: IR-USB interface adapter,
a USB cable, and a CD with software for the PC.
1.2. Introduction to measuring principles
1.2.1. What is impedance
Impedance (Z) consists of resistance (real part) and reactance
(imaginary part). Series impedance (Zs) can be defined as a
combination of series resistance (Rs) and series reactance (Xs). It
can be represented mathematically as magnitude |Z|=√(Rs2+Xs2)
at a phase angle Θ.

- 3 -
There are two types of reactance. One is inductive reactance –
XL, and the other is capacitive reactance – XC.
If Θ> 0, the reactance is inductive. If Θ< 0, the reactance is
capacitive.
The inductive and capacitive reactances (XLand XC) can be
defined as:
XL= 2πƒL
XC=1÷(2πƒC)
Where:
L= Inductance
C= Capacitance
ƒ= signal frequency)
Zs = Rs + jXs or |Zs|∠Θ
Rs = |Zs| cosΘ
Xs = |Zs| sinΘ
Xs/Rs = tanΘ
Θ= tan-1(Xs/Rs)

- 4 -
1.2.2. Measuring impedance
Impedance can be measured in series or in parallel. In parallel
mode, impedance can be represented as reciprocal of admittance
(Y). The admittance can be defined as Y= G+ jB, where:
G= Conductance
B= Susceptance
Series impedance Parallel admittance
To understand the ratio of resistance and reactance, it is
important to consider two factors: quality factor (Q) and
dissipation factor (D). Usually Qis used when measuring
inductance and Dis used when measuring capacitance. Dis
defined as the reciprocal of Q.
Q= 1/D= tanΘ
Q= Xs/Rs = 2πf Ls/Rs = ½πf CsRs
Q = B/G= Rp/|Xp| = Rp/2πf Lp = 2πf CpRp
Rs = Series resistance
Xs = Series reactance
Cs = Series capacitance
Ls = Series Inductance
Rp = Parallel resistance
Xp = Parallel reactance
Cp = Parallel capacitance
Lp = Parallel inductance
Y= 1/Z= 1/Rp + 1/jXp = G+jB

- 5 -
Both Rs and Rp are part of the equivalent circuit of capacitors
and inductors. When measuring capacitance and inductance, it
is best to use the settings as shown in the table below.
Value Setting
Capacitance
Low Parallel
High Series
Inductance
Low Series
High Parallel

- 6 -
1.3. Equivalent circuit

- 7 -
1.4. Instrument layout
Front panel Side
GUARD provides a shield to reduce noise for device under test
(DUT), test leads, and other equipment.

- 8 -
23.
TL
-
23
Guard Line
22.
TL
-
22
SMD tweezers, 4-wire
(optional)
21.
TL
-
21
Alligator –lead test-lead adapter
(4-wire joined at alligator clips)
Rear
IR
-
USB interface
(optional)

- 9 -
1. LCD display
2. POWER Turns the instrument on/off.
3. LCR AUTO
LCR auto
mode,
Inductance,
Capacitance, Resistance and DC
resistance measurement selection
4. FREQ Testing frequency selection
5. Backlight display
6. SORTING Sorting mode control
7. PC ▲UART output control
8. CAL Open/Short calibration mode
9. D/Q/ESR/ΘD/Q/ ESR/Θparameters selection
10. SETUP
Setup menu control
(in sorting mode )
11. SER/PAL Series and Parallel selection
12. ENTER
Setup menu control
(in so
rting mode )
13. REL% Relative mode
14. HOLD Data hold
15. Input sockets and Terminals (4-terminal)
16. AC adapter plug
17. Battery cover
18. Tilt-Stand
19. IR Slot
20. IR-USB adapter (optional)
21. TL-21 Alligator-clip test-lead adapter
22. TL-22 SMD tweezers (optional)
23. TL-23 Guard Line

- 10 -
1.5. LCD display layout
1. Sorting Sorting function is enabled
2.
Tol
Tolerance indicator in sorting mode : ±0.25%,
±0.5%, ± 1%, ±2%, ±5%, ±10%, ±20%, &
+80%-20%
3.
kHz Testing frequency indicator:
1kHz,10kHz,100kHz,100Hz & 120Hz
4.
PC PC connection is active
5.
Battery capacity indicator
6.
Range Range selection is enabled on setup menu of
sorting mode
7.
Auto Auto range for L, Cor R measurements
8.
LCR Checking for L/C/Rmode automatically
9.
∆Relative function is enabled
10.
Ls/Lp Inductance in series or parallel mode is active
11.
Cs/Cp Capacitance in series or parallel mode is active
12.
Rs/Rp ac resistance in series or parallel mode is active
13.
DCR dc resistance mode is selected

- 11 -
14.
D/Q/Θ Dissipation factor, Quality factor or Phase angle is
active for L/C measurement mode
15.
Rp ac Resistance in parallel mode is active
16.
Cal Open/Short calibration mode
17.
HOLD Data Hold
18.
APO Auto power off mode
19.
ESR Series equivalent resistance mode
20.
Secondary Display
21.
° Phase angle
22.
MkΩ Unit for Resistance (Ω, kΩand MΩ)
– on secondary display
23.
Unit for Capacitance ( pF, nF, µF and mF )
– on secondary display
24.
Unit for Inductance ( µH, mH and H)
– on secondary display
25.
% The percentage display in relative mode
– on secondary display
26.
Primary Display
27.
MkΩ Unit for Resistance ( Ω, kΩand MΩ)
– on primary display
28.
Unit for Inductance ( µH, mH and H)
– on primary display
29.
Unit for Capacitance ( pF, nF, µF and mF )
– on primary display
30. Bar-graph display
Special Indication Characters
Indicates short calibration
Indicates open calibration

- 12 -
Chapter 2: Operation
2.1. How to obtain optimum precision
To access optimum precision for all L, C, and Rmeasurements,
especially at the highest and the lowest ranges, zero the instrument
before use (pages 16-18).
To secure the specified accuracy, connect the device under test
(DUT) to the measuring socket, or use either TL-21 (standard
accessory) or TL-22 (optional accessory).
If you are using test leads other than the ones specified above, use
4-wire leads and avoid using long lead wires to reduce measurement
errors.
2.2. Default settings
When the power is turned on, the monitor displays all symbols for 2
seconds as shown below.