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5.4 The digital multimeter
5.4.1 Operating elements
1. Device on/off
2. Function pushbutton
The various subfunctions, such as MIN/MAX, REL, DUAL, etc. are set
using this button.
3. Set/Reset button
The instrument is reset into its basic condition with this button.
4. DC Ω / AC (•) button
This button switches the measurement from DC to AC values or,
under resistance measurement, from actual resistance measure-
ment to continuity test
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5. Up button ("plus" button)
6. Down button ("minus" button)
7. Capacity and inductance socket
In this socket uncharged capacities and voltage-free inductances
(coils, chokes, transformers, etc.) can be measured.
8. Rotary switch for setting the different operations (voltage measure-
ment, current measurement, etc.)
9. A input socket for the measurement of DC and AC currents to 20 A
max.
10. mA input:
This input is for measuring direct and alternating currents up to 400
mA max. (protected with a quick-acting 800mA fuse).
11. COM (-) input socket (COM or negative connection)
12. V-Ohm (+) input socket (= positive connection)
13. LCD display (3/4-position, highest display value: 3999)
14. Analogue bar graph
15. Bar graph line division
16. Overload "OL" display
If "OL" appears in the display, this means that the range has been
exceeded
Attention!
Observe maximum input levels.
17. Auto Hold "A" in front of the small display
18. Data Hold
Data Hold "freezes" the measured value.
19. MIN = Minimum
As soon as this symbol appears in the display, the lowest-measured
value at any given time is displayed, for example during discharge
of rechargeable cells.
20. MAX = Maximum
As soon as this symbol appears in the display, the highest-measured
value at any given time is displayed, e.g. during overvoltage.
21. REL = Relative
22. MEM = Memory
23. RCL = Recall = of stored measured value
24. R-H = Range Hold = Auto Range switched off, manual range{723}
selection, excluding CAP capacity measuring range.
25. EXT = External
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