9
8.1 Voltage measurement on electrical systems up to 1000V
with the KS30 measuring adapter.
On low-Voltage systems, transient over voltages 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..
9. Current Measurement
E
First disconnect the power supply to the circuit being measured and/
or to the load, and discharge all capacitors within that circuit.
E
Select the DC current measuring ranges as described in section 4.1
E
With the function selector
current of unknown magnitude,
E
Select the function corresponding to the measured quantity by briefly
pressing the yellow multi-function pushbutton (5). Each time the
pushbutton is pressed, alternate switching takes place between DC
and (DC + AC).
The change-over is acknowledged by a sound
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+AC 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 + AC and acknowledges this
by two sound signals.
E
Connect the multimeter in series with the load, as shown. Ensure
that the connections are tight (without contact resistance).
mA
for currents <300 mA. When
measuring
- - -
select the highest
measuring range first.
signal. The symbols
Notes on Current measurement :
l
The multimeter must be used only in the power systems, where the
current circuit is protected by a fuse or a circuit breaker of 2 A and when
the nominal voltage of the system does not exceed1000V AC/DC.
l
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.
l
On the 300 mA an Intermittent sound signal warns you, when the
Measured value exceeds the upper range limit.
l
The current measuring ranges upto 300 mA are protected to a short
circuit current of 25 A by a fuse 1.6 A/1000V AC/DC in conjunction,
with power diodes. The cut-out capacity of the fuse is 10kA at a rated
voltage of1000V AC/DC
and ohmic load.
E
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.
E
Overload capacity : contin
Transient (rise 10 µ
E
Safe suppression of sparking from spark plug after overvoltage.
E
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 !
uously 1200 Vrms
s/fall 1000 µ s) 6 kV max.
22
Intrinsic error of digital display
+(...% of reading. + ... digits) at reference conditions
Overload
Capacity
3)
Overload
duration
Overload
value
1.0 + 3
4)
1.0 + 3
1.0 + 3
3.0 + 3
0.5 + 1
7)
2Hz... 1 kHz + 5 Digit
8)
1kHz ...10 kHz; +
5 Digit/kHz
8)
2 5 Digit
9)
1.0 + 5
9)
2 2 Digit
9)
1.0 + 2
9)
1000 V
DC / AC
eff / rms
sine
Max 10 S
1000 V
DC
AC
eff/rms
sine
<3 kHz;
1000 V
<30 kHz;
300V
<100kHz
30 V
continu-
ously
Max 10 S
1.0 + 3
4)
1.0 + 3
1.0 + 3
3.0 + 3
1000 V
DC / AC
eff / rms
sine
Max 10 S
7) Range
3 V
:U E = 1.5 V eff/rms ... 100 V eff/rms
30 V
: UE = 15 V eff/rms ... 300 V eff/rms
300V
:U E = 150 V eff/rms ... 1000 V eff/rms
8)
On the range 3V
- - -
, square-wave signal positive on one side 5 ... 15 V,
f = const., not 163.84 Hz or integral multiple.
9)
Without sensor.
Reference conditions
0
Ambient temperature
: + 23
Relative humidity
:
Frequency of measured
Waveform of the measured
Battery voltage
C + 2 K
45% ... 55 % RH
quantity
45Hz ...65 Hz
quantity sinusoidal
8 V + 0.1 V
Содержание Zeta 30
Страница 2: ......
