Zhengzhou Ming He Electronic Technology LC200A User manual

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LC200A Handheld L/C Meter
Inductance Capacitance Meter
User Manual
Rev. 5.0
Zhengzhou Minghe Electronic Technology Co., Ltd

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Features:
High speed microcontroller’s precision computation
Measuring range below 1uH and 1pF
Intellectually Shutdown in 5 minutes
Especially qualify in microwave manufacture and measuring switching
power supply transformer, filter inductance and so on.
LC200A has four measuring range positions:
1. C range ........Capacitance (0.01pF-10uF)
2. L range ........Inductance (0.001uH-100mH)
3. Hi.L range ......Big inductance (0.001mH-100H)
4. Hi.C range ......Big capacitance (1uF-100mF)
All range position are automatic measuring ranges, it is easy to
operate. Specification is as follows:
1. Technique data：
Item Parameter
Capacitance
Accuracy
0.01pF-1pF 5%
1pF-1uF 1%
1uF-10uF 5%
Min Capacitance Resolution（C Range）0.01pF
Inductance
Accuracy
0.001uH-1uH 5%
1uH-100mH 1%
Min Inductance Resolution（L Range）0.001uH
Big Inductance
Accuracy
100mH-1H 1%
1H-100H 5%
Min Resolution of Big Inductance 0.001mH

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（Hi.L Range）
Big Capacitance Accuracy 1uF-100mF 5%
Min Resolution of Big Capacitance
（Hi.C Range）
0.01uF
Frequency
L Range、C Range Abt. 500kHz
Hi.L Range Abt. 500Hz
Display mode 1602 LCD
Display digit 4
Power supply interface
Mini USB &
Φ5.5DC Socket
4 of AA Batteries
Supply Voltage 5V
2. Picture

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Function of five buttons:
Red: Reset
Blue: Big Capacitance Hi.C Choice (With self-locking)
Blue: Big Inductance Hi.L Choice (with self-locking)
Blue: L/C Choice (with self-locking)
Blue: Function button
Details as follows (Press “1”, Release “0”, “X” random)
LC200A Function table
Hi.C Hi.L L/C Corresponding function
0 0 0 Small Capacitance(C)
0 0 1 Small Inductance(L)
0 1 1 Big Inductance (Hi.L)
0 1 0 Error，please modify
1 X X Big Capacitance (Hi.C)
3. Direction for use
⑴. Switch on the L/C Meter
⑵.Chose the corresponding range, inductance: Lx, capacitance: Cx,
big inductance: Hi.L, big capacitance: Hi.C. Display as follows
(testing lead open loop) ：
Inductance：MEASURE Lx OVER RANGE
Capacitance：MEASURE Cx 0.00pF

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Big inductance：MEASURE Hi.L OVER RANGE
Big capacitance：MEASURE Hi.C 0.00uF
Display as follows (testing lead short circuit):
Big inductance：MEASURE Hi.L 0.000mH
Inductance：MEASURE Lx 0.000uH
Capacitance：MEASURE Cx OVER RANGE
(3).When testing lead open loop the measured value of capacitance is
not “0”, or witch of the inductance is not “0” as the testing lead
short circuit, you can reset to “0” by ways of capacitance model
and inductance model, as follows:
(a) Capacitance model
Press red button as testing lead open loop, it displays
“CALCULATING…”, keep pressing for one second, when
“CALCULATING…OK” displayed, release the red button,
resetting to “0” is finished, and “0.00pF” is displayed, then
capacitances can be measured.
(b) Inductance model
Press red button as testing lead short circuit, it displays
“0.000uH” or “0.000mH”, and then inductances can be
measured.
(4). Please press function button as results displayed, and
corresponding frequency will be displayed.

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4. Note:
1. Please reset to “0” before testing a capacitance or an inductance, or
errors may be appeared. Even if “0” displayed before measuring,
resetting to “0” is needed.
2. At the time of resetting to “0”, when“CALCULATING…OK”
appeared, please keep pressing for 2 to 3 seconds, and the parameter
written to “<DATA SAVED>” will be prompted, then release.
3. Resetting to “0” is forbidden as components are being measured. If
you do it, please shut down immediately and restart, then reset to “0”.
4. The time of measuring a big capacitance (above 10mF) may be more
than one second, and it needs seven to eight seconds to get the
measured value of the capacitance (100mF).
5. Forbid to measure a capacitance which is not discharged, otherwise it
may damage the mainframe.
5. Package content
1. A LC200A L/C Meter
2. A mini USB Cable or DC5V adaptor