27
Wattmeters
3.2
Voltage measurements (V)
1.
Press the
ON/OFF
key: the first screen appears
2.
Connect the measurement leads to the instrument’s voltage measurement terminals (on
the right), complying with the polarities indicated: red lead on the “
+
” terminal and black
lead on the “
COM
” terminal.
3.
Connect the assembly to the voltage source to be measured, making sure if possible that
this voltage does not exceed the maximum acceptable limits (see table below).
The upper digital display indicates the value of the voltage and the corresponding unit (
V
).
3.2.1
Specific reference conditions
DC:
AC component < 0.1% of the DC signal
AC:
Sinusoidal signal (THD < 0.1%)
3.2.2
Characteristics
Display range
600 V
(1)
Measuring range
0.5...600 V
Accuracy for AC
0.5% of reading ±2 counts
Accuracy for DC
1% of reading ±3 counts
Resolution
0.1 V
Display stability
5 cts in normal mode - 2 cts in SMOOTH mode
Repeatability of the measurement
0.2% typical
Display response time
500 ms in normal mode - 3 s in SMOOTH mode
Input impedance
1 M
Ω
(1) Above 600 V +3%, the display indicates “
OL
”
.
3.3
Current measurements (A)
1.
Press the
ON/OFF
key: the first screen appears
2.
Connect the measurement leads to the instrument’s current measurement terminals (on
the left), complying with the polarities indicated: red lead on the “
+
” terminal and black
lead on the “
COM
” terminal.
If the “Voltage” terminals are not connected
, current measurement is possible but the
frequency taken by default is 50 Hz
3.
Set up as shown in the diagram below, making sure if possible that the maximum
acceptable limits are not exceeded (see table below).
L1
N
W
L1
N
U
U
I
I
Fig 3.3.1 Single-phase connection diagram
Note:
Range switching is automatic.
Chapter III
北京海洋兴业科技股份有限公司（证券代码：839145）
电话：010-62176775