Tus neeg siv phau ntawv

200pF
2nF
2uF
200nF
20nF
20mF
2000uF
200uF
20uF
DIGITAL CAPACITANCE METER USERS MANUAL
1. GENERAL DESCRIPTION
With light-weight and compact structure, this battery-operated 3 1/2 digits capacitance
meter has high accuracy and wide ranges from 200pF to 20mF. LSI-circuit provides
high reliability and durability for this meter. It can accurately measure capacitance of
cables, switches, PCB circuit, etc. It’s widely applied in labs, production line,
maintenance locations and schools.
It has features of low power consumption, clear LCD display, low battery indicator, and
fast sampling. In addition, the meter offers advanced features, such as capacitor
self-discharge function. It can discharge the capacitor automatically, and protect the
meter from the damage caused by voltage.
2. FEATURES
2.1 General characteristic
2.1.1 Display: LCD Max display 1999.
2.1.2 Capacitance measurement: 0.1pF to 20mF, with 9 ranges.
2.1.3 Overload protection: display “1”.
2.1.4 Calibration: Zero adjustment knob, can calibrate 20pF.
2.1.5 Over range: display “1”.
2.1.6 Sampling time: 0~5seconds
2.1.7 Working conditions: 0℃ to 40℃, and relative humidity less than 80%
2.1.8 Power source: 9V (6F22 or equivalent)
2.1.9 Battery life: 200 hours for alkaline battery, and 100 hours for carbon-zinc battery
(at 200pF to 200uF range, consumption current is 3~4mA).
2.1.10 Standard Accessories: test alligator clips (red & black), and manual.
2.2 Technical data
Accuracy: ± (a% of reading+ digits) at 23 ± 5℃, relative humidity<75%.
Range
Resolution
Accuracy
Test Frequency
Max Display
200pF
0.1pF
±(0.5%+1)
800Hz
199.9pF
2nF
1pF
±(0.5%+1)
800Hz
1.999nF
20nF
10pF
±(0.5%+1)
800Hz
19.99nF
200nF
100pF
±(0.5%+1)
800Hz
199.9nF
2uF
1000pF
±(0.5%+1)
800Hz
1.999uF
20uF
0.01uF
±(0.5%+1)
80Hz
19.99uF
200uF
0.1uF
±(0.5%+1)
8Hz
199.9uF
2000uF
1uF
±(2%+1)
8Hz
1999uF
20mF
10uF
±(2%+2)
8Hz
19.99mF
200mF
100uF
±(5%+10)
8Hz
199.9mF
Driving voltage: 2.8V peak value, input voltage of positive terminal should always
higher than input voltage of negative terminal.
Overload protection: 0.2A recoverable fuse. The meter can discharge voltage (lower
than 250V) of capacitor automatically.
Zero adjustment: limited to 20pF
3. OPERATION
3.1 Panel description: (see the pic.1)
① LCD: display the measuring value, unit symbol and low battery indicator.
② POWER key: turn On/Off the meter.
③ Zero adjustment knob/ “ADJ” knob: perform
zero adjustment before measuring capacitance
under 20nF.
④ Rotary switch: select measuring range.
⑤ Slot and jack: capacitance input terminal.
⑥ Battery door.
3.2 Cautions before measurement
3.2.1 Pay attention to the polarity if the capacitor
is a polarized type. Use the red test clip to clip the capacitor’s positive and the black test
clip to clip the capacitor’s negative when the capacitor has polarity.
3.2.2 To avoid damage to the meter or to the equipment under test, disconnect circuit
power source and discharge all high-voltage (higher than 250V) capacitors before
measurement.
3.2.3 DO not connect the test terminal with voltage source, and do not measure the
capacitor in circuit if there is high voltage. Even if it can get readings, it will cause the
big error and damage the meter (when the circuit is not powered off or there exists
voltage, or the capacitor isn’t discharged completely).
3.2.4 Do not short the test leads, otherwise it will cause dissipation of large current, and
make over range display in all ranges.
3.2.5 Zero adjustment will fail when SMD test clip’s capacitance is bigger than 20pF.
3.3 Capacitance measurement
3.3.1 Turn the rotary switch to a proper capacitance range;
3.3.2 To obtain accurate measuring values, perform zero adjustment before measuring
capacitance under 20nF. Slowly turn the “zero adjustment knob” to calibrate the display
until the LCD shows “000”. Please perform the zero adjustment with test leads or SMD
test clip inserted in. The adjustment range is 20pF.
3.3.3 Insert the capacitor into the slot or clip the capacitor with test clip, the value will
be displayed on LCD with the unit of the selected range. If LCD displays “1”, it means
over range. If there is “1” or “00” before the digit, choose a lower range to increase the
resolution and accuracy.
Note:
1) If the value of capacitor to be measured is unknown, choose the lowest range 200pF
and increase the range step by step until a satisfactory reading is obtained and the over
range symbol “1” is disappeared.
2) If capacitor is breakdown, LCD will display over range symbol “1” in all ranges. If
capacitor has small leakage, LCD will display over range symbol “1” or a big
capacitance value which is much bigger than the normal value. If capacitor is
open-circuit, LCD will display “0” at all ranges;
3) When measuring the small (pF) capacitance, to minimize the effect of capacitance
stored in the test clips, the test clips should be as short as possible and try to use the slot
if it is possible. Keep the test clips close to the pins of capacitor under measuring, and
then perform zero adjustment. Make sure the distance between test clips isn’t change
when you measure the capacitor, thus can get a accurate value.
4) Some test leads may carry large capacitance, if it can’t be calibrated by “ADJ” knob,
you should remember the capacitance value, and then deduct it from your test results.
5) Some capacitors especially the electrolytic capacitor will have large capacity. Don’t
be surprised if the test result is much bigger than the nominal value. Usually the test
result is rarely smaller than the nominal value.
6) To check the existence of leaky capacitor, switch the function knob to different
capacitance ranges. If the test value has significant difference, it means there is a leaky
capacitor. The difference increases proportionately with the capacitance of leaky
capacitor.
4. AUTO POWER OFF
When there is no measurement in 20 minutes, the meter will auto power off and enter
dormancy mode. Press power button will exit the dormancy mode. It won’t power off
when LCD displays values bigger than 20% of the Max value at this range.
5. MAINTENANCE
The meter is a precise instrument. Random changes to the circuit are not allowed.
Note:
5.1 Keep the meter away from water, dust and shock.
5.2 Don't expose the meter under high temperature, high humidity, combustible,
explosive and strong magnetic place.
5.3 Wipe the case with a damp cloth and detergent. Do not use abrasives and alcohol to
clean the meter.
5.4 To avoid leakage damage, remove the battery if the meter will not be used for a long
time.
5.5 When “
” symbol is displayed, please replace the battery according to the
following steps:
5.5.1 Follow the picture, and remove the
holster at first.
5.5.2 Unlock the battery door and remove the
cover.
5.5.3 Replace the old battery with the new
one. For longer using life, it's better to use
alkaline battery.
5.5.4 Fix the battery door.
5.5.5 Follow the picture to put on the holster
◼ The specifications are subject to changes without prior notice.
◼ The content of this manual is regarded as correct. If users find out any mistakes or
omissions, please kindly contact the manufacturer.
◼ The manufacturer will not be responsible for accidents and damage caused by
improper operations. The functions described in this User Manual shall not be
considered as the reason for any special usages.
200pF
2nF
2uF
200nF
20nF
20mF
2000uF
200uF
20uF
200pF
2nF
2uF
200nF
20nF
20mF
2000uF
200uF
20uF