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1. Introduction
This 4
1
/
2
-digit multimeter with multi-display is equipped with several
special features which are useful fo some measurements:
With the key FUNC several special functions can be selected which are
supported by the buttons SET/R, UP and DOWN. These special functions
are shown in the top line of the display. The function D-H (= Data Hold)
for example, variable measuring values are "frozen" to use them after-
wards for further evaluation, e. g. measuring reports. The frozen value
can be read in the middle sub display.
With the next special function the meter will automatically record the
minimum (= MIN), the maximum and the average (AVG) display reading.
The neaxt special funtion is the relative mode REL, it enables the opera-
tor to compare a manually prset reference value with the subsequent
measurement.
The three subdisplays show from the left to the rigth the deviation in %,
the difference to the reference value and the preset reference value.
With the function "MEMORY" up to 10 display contents can be stored
and be recalled with the function RCL later from the memory.
The special function CMP (= Comparison) enables you to compare a refe-
rence value (High/Low) with the subsequent readings.
The function LOGIC, at the rotary function switch, enables you to check
and to display all usual logic levels. Besides he display reading Lo, ----
(= Pass) and Hi, the subdisplays show the frequency of the level and the
voltage.
With the function "hfe" small power transistors can be checked. The func-
tion CAP Hi and CAP Lo check the capacity of capacitors.
With the function "TEMP" you can measure temperatures to max +1200°C
with a thermoelement (option), it is connected to the CAP measuring
socket. With the frequency function "FREQ" you can measure the fre-
quency of measuring signals (not mains voltage) to 200 KHz. With the
function "S/O" = Signal Out, 10 different preset frequencies from 10 Hz
to 10.24 KHz can be recalled. For this a special adapter (option) is needed
which is connected to the CAP-measuring socket.
2
Digital Multimeter M-4660A,
Order-No. 12 37 30
Attention! Read before operation!
Read these operating instructions carefully and completely. In the case
of damage caused by ignoring the instruction, the claims under gua-
rantee lapse. No legal liability can be accepted for any damage from the
multimeter being used for the wrong purpose or operated improperly.
Thus cannot take any liability for consequential damage.
The proper operation of the measuring unit includes:
• measurement of DC voltage to 1000 VDC max in five steps
• measurement of AC voltge to 750 VAC max in five steps
• measurement of DC and AC currents to 20 A max., for max. 30 s (un-
fused), in 3 steps each
• measurement of resistance to 20 m
Ω
, in 6 steps
• measurement of capacity to max. 20 µF in 2 steps: Hi and Lo
• continuity test, diode, transistor and logic test, measurement of fre-
quencies to max. 200 KHz, signal output of 10 Hz to 10,24 KHz and
teperature measurement of -40°C to +1200°C
Contents
page
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Safety rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Description of the control elements . . . . . . . . . . . . . . . . . . . . . . . . 6
4. Use of the multimeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5. Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6. Maintenance and calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7. Technical data and accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
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