Ziegler MULTI 12S User Manual Download Page 11

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8.1Voltage measurement on electrical systems up to

1000V with the KS30 measuring adapter.

On low-Voltage systems, transient overvoltages of several kilovolts can
occur due to switching functions or lightning discharges. Direct connection
of your multimeter to such systems for voltage measurement can be
dangerous.
For voltage measurements in power systems with nominal voltages upto
1000V, use the KS30 measuring adapter. It is an adapter for multimeter
which eliminates dangers caused by overvoltages and incorrect operation
of the multimeter. It provides the following protective functions..

Protection of the input circuit of voltage measuring range of
multimeters. The internal resistance of the KS30 limits the current in
the case of overvoltage.
Overload capacity : contin uously 1200 Vrms

Transient (rise 10 ms/fall 1000 ms) 6 kV max.

Safe suppression of sparking from spark plug after overvoltage.
Current limitation in the case of incorrect operation (e.g. applying a
voltage to a current input)

Voltages above 1000V can be measured with a high-voltage probe,
provided the necessary safety precautions are taken !

9. Current Measurement

First disconnect the power supply to the circuit being measured and/
or to the load, and discharge all capacitors within that circuit.
Select the DC current measuring ranges as described in section4.1
With the function selector switch (6), select A

for currents >300mA,

and mA

for currents<300 mA. When measuring current of unknown

magnitude, select the highest measuring rangerst.
Select the function corresponding to the measured quantity by briey
pressing the yellow multi-function pushbutton (5). Each time the
pushbutton is pressed, alternate switching takes place between DC
and AC on the

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Multi

12S...15S or between DC and (DC + AC)

on the

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Multi

16S. The change-over is acknowledged by a sound

signal. The symbols DC and AC (11) are displayed as per selected
function on the LCD.
When selecting a range with the function selector switch (6), the DC
function is always set by default. When pressing the yellow multi-
function pushbutton (5) for a long time, the multimeter always switches
back to DC and acknowledges this by two sound signals.
Connect the multimeter in series with the load, as shown. Ensure
that the connections are tight (without contact resistance).

Notes on Current measurement :

The multimeter must be used only in the power systems, where the
current circuit is protected by a fuse or a circuit breaker of 20 A, and
when the nominal voltage of the system does not exceed 500V.
Make the measuring circuit connections mechanically strong and
secure so that they do not accidentally open. The conductor cross
sections and connection points should be designed to avoid excessive
heating.
On the 300 mA and 10 A ranges (16 A range for

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Multi

13S), an

intermittent sound signal warns you, when the measured value
exceeds the upper range limit.
The current measuring ranges upto 300 mA are protected to a short

C ... + 40

With zero adjustment; without zero adju 50 digits.

Meas-

urement

Func-

tion

Measuring Range

RISH

Multi

15 16

Resolution

Discharge