Mars 65746 User manual

®
65746 Capacitance Meter
OPERATION MANUAL
1. Introduction
This instrument is a reliable precise 3 1/2-digit capacitance meter,
which has 10 ranges and is suitable for use in factory, lab, school,
institute and etc. It is easy to use and is a very useful measurem
-ent tool.
1.1 Characteristics
LCD display, with a max. reading of 1999
10 Ranges
High accuracy
Dual-slop integration A/D converter
Over range indication:"1"shown on the display
Safe design test leads
Size: 35mm x 91mm x 189mm
Weight: about 250g (including battery)
2.1 General
Power: 9V (6F22) Battery
Low battery indication: " " shown on the display
Operation condition: Temperature: 0°C~40°C (32°F~104°F)
Relative humidity: <75%
Storage condition: Temperature: -10°C~50°C (14°F~122°F)
Relative humidity: <85%
Zeroing method: Adjust the "0 ADJ" knob
2. Specifications
1 2
2.2 Specifications
Accuracy is specified for a period of one year after calibration and
at 18°C to 28°C, with relative humidity <75%
Accuracy specifications take the form of:
±([% of Reading]+[number of Least Significant Digits])
Range Resolution Accuracy Frequency
200pF 0.1pF ±(0.8%+7)
2000pF 1pF
20nF 10pF 800HZ
200nF 100pF ±(0.5%+5)
2uF 1000pF
20uF 0.01uF 80HZ
200uF 0.1uF ±(2.0%+5)
2000uF 1uF ±(2.0%+5) 8HZ
20mF 10uF ±(5.0%+5)
±(0.8%+5)
±(0.8%+5)
Temperature coefficient:
0.1%/1°C for ranges 200pf, 2000pF, 20nF, 200nF
0.2%/1°C for ranges 2uF, 20uF, 200uF, 2000uF, 20mF, 200mF
3. Instruction
CAPACITANCE
SOCKET
LCD DISPLAY
ROTARY SWITCH
ZEROING KNOB "0 ADJ"
INPUT JACKS

4. Using the Meter 5. Maintenance
6. Accessories
3 4
4.1 Caution
1) Install battery carefully.
2) If the capacitor to be measured has polarity, connect it to the
meter with correct polarity connections. (+ to + jack, - to - jack)
3) Discharge the capacitor to be measured before measurement.
4) Never input voltage to sockets, it will cause damage.
5) Turn off the meter and remove test leads from the meter
before replacing battery or fuse.
4.2 Preparations
1) Before performing in-circuit capacitance measurement,
disconnect circuit power and discharge all capacitors.
2) Clean meter once a while if you use it in a dusty place.
3) Avoid exposing the meter to direct sunshine.
4) If you want to measure capacitor with the test leads, connect
the black test lead to the "_" jack and the red test lead to
the "+"jack.
4.3 Capacitance measurement
1) Set the rotary switch to the "200pF" position, then zero the
reading on the display with the "0 ADJ" knob.
2) Set the rotary switch the highest range position.
3) Connect the test leads to the capacitor or insert the cvapavitor
to the apacitance socket directly.
4) If the LCD displays a reading with one or more preceding
zeros, select a lower range to make the reading have more
numbers of significant digits.
If the overrange indicator "1" appears on the LCD, you should
set the rotary switch to a higher range position.
5) Read the reading on the display.(reading's unit is same as the
currently selected range's unit)
When" " appears on the LCD, replace the battery immediately.
Open the back cover, replace the exhausted battery with a new
one of the same type. Reinstal the back cober and the screws.
The meter uses a fuse : 500mA/ 250V, Fast action. To replace
fuse, open the back cover, replace the blown fuse with a new one
of the same ratings. Reinstall the back cover and the screws.
Whenever the meter operates abnormally or has malfunction,
stop using it, and have it repaired.
Don't use meter with back cover open.
Use wet cloth or a little detergent for cleaning only.
1) Test leads : 1 pair
2) Battery 9V (6F22) : 1 piece
3) Manual : 1 copy
DISPOSAL OF THIS ARTICLE
Dear Customer,
If you at some point intend to dispose of this
article, then please keep in mind that many
of its components consist of valuable materials,
which can be recycled.
Please do not discharge it in the garbage bin,
but check with your local council for recycling
facilities in your area.