3
1. Introduction
This Mulitmeter is equipped with several special features and useful fun-
ctions which are indispensable for electrical and electronic measure-
ment: back-light, illuminates display in poor lighting conditions during
measurement, or the quadro-display, a multiple display with four simul-
taneous reading outputs e.g. during “POWER“ measurement display of
real power input, current input of the consumer, AC voltage and power
factor (Cos Phi).
AUTO RANGE always selects the correct measuring range, to archieve
best accuracy. The function REL allows the operator to measure value
with respect to a preset reference value, in the secondary displays the
Offset is shown, the deviation in ± % and the preset reference value and
the main display shows the present measuring value. With the function
CMP, comparative measurement can be made, the upper and the lower
limit can be defined. With the function MEM (for Memory = store) and
RCL (for Recall), 10 measurements can be stored in memory and recalled.
AUTO-POWER-CUT-OFF extends the life of the battery by turning off the
meter (Stand-by) if neither the rotary function switch nor a button is
operated for 12 minutes.
The DMM can be used for hobby, industry (with restrictions) and school.
etc.
2. Safety Rules
• The multimeter M-3860M is EMC-tested and corresponds to the fol-
lowing EG-standard: 89/336/EWG
• This unit is constructed and checked according to DIN 57 411
Part 1/VDE 0411 Part 1, Safety Requirement for Electronic Measuring
Units. This unit left the factory in safe and perfect condition. To main-
tain the unit in this condition and to guarantee a safe operation, the
user must observe the safety rules and warnings which are contained
in this manual, by all means.
• This multimeter may only be used in fuse lines which are protected
with 16 A. The voltage existing/appearing must not exceed 250 VDC/
VAC and the maximum load must not exceed 4000 VA. It is not allo-
wed to use the unit for installations in the overload range III according
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Digital-Multimeter M 3860-M
Order No.: 12 39 00
The proper operation of the measuring unit includes:
• measurement of DC voltage up to 1000 VDC max.
• measurement of AC voltage up to 750 VAC.
• measurement of DC and AC current to 20 A (fused)
• measurement of resistance to 40 M
Ω
max.
• measurement of capacitance of 400 µF
• continuity check, diode and transistor test, logic test
• measurement of frequency to 40 MHz max.
• measurement of temperatures from -40 °C to +1200°C max.
• CMOS-signal output to 10.24 KHz in 10 steps
• it is not allowed to operate the unit in wet or damp environment!
• any other usage as described above is forbidden
Attention!
Read before Operation!
Read this manual carefully and completely. In the case of damage cau-
sed by non-observance of the instruction, the claims under guarantee
lapse. No legal liability can be accepted for any damage from the multi-
meter being used for the wrong purpose or operated improperly. We
cannot take any liability for consequential damage.
Contents
Page
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Safety Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Description of the Control Elements . . . . . . . . . . . . . . . . . . . . . . . . 6
4. Usage of the Multimeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5. Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6. Maintenance and Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7. Technical Data and Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
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