Measurement Value Display; Relative Measurement Value Deviation ∆ % (#, %); Absolute Measurement Value Deviation ∆Abs (#); Selecting The Measurement Function - Hameg R&S HM8118 Benutzerhandbuch

Setting of Parameters
manual value input via numeric keypad. This opens a va-
lue entry window where you can enter the respective va-
lue by means of number pads (in addition to the corres-
ponding unit, depending on the measuring instrument pa-
rameter). After entering the value via keypad, confirm the
entry by pressing the ENTER key or by pressing the knob
again. Before confirming the parameter, you can delete the
value that has been entered incorrectly by pressing the
key. The ESC key allows you to cancel the operation to en-
ter parameters. This will close the editing window.
5.2

Selecting the Measurement Function

Out of nine measurement functions, the LCR bridge
R&S®HM8118 allows you to measure two parameters si-
multaneously and display them as measurement values.
The first parameter refers to the „main measurement va-
lue display" and the second parameter to the „secondary
measurement value display". Depending on the connected
component, the following main and secondary measure-
ment value displays can be shown:
Inductance L and quality factor (quality) Q
L-Q
Inductance L and resistance R
L-R
Capacity C and dissipation factor D
C-D
Capacity C and resistance R
C-R
Resistance R and quality factor (quality) Q
R-Q
Apparent impedance (impedance) Z
Z-Θ
and phase angle Θ
Admittance Y and phase angle Θ
Y-Θ
Resistance R and reactance X
R-X
Conductance G and susceptance B
G-B
Transformer ratio N and
N-Θ
Phase difference Θ
Transformer mutual inductance M
M
You can select the desired measurement function by pres-
sing the keys to .
29 39
In the automatic mode (key AUTO), the bridge switches
both the measurement function (key
internal equivalent circuit diagram of the measurement cir-
cuit appropriately to the measured values to serial (for in-
ductive loads) or to parallel (for capacitive loads).
50
6 Measurement
The values measured with the LCR bridge R&S®HM8118
can be shown on the LCD display in three different
versions:
❙ Measurement value
❙ absolute measurement value deviation ∆ ABS or
❙ relative measurement value deviation ∆ % (in percent).
Press the SELECT key
ting DEV_M (for the main measurement value display) and
DEV_S (for the secondary measurement value display) to
switch the measurement value display. If you select the
function DEV_M or DEV_S via arrow keys, you can press
the knob to activate the editing mode. If the editing mode
is active (blinking „E" on the display), you can use the knob
to select the respective measurement value display. Press
the knob again to deactivate the editing mode and to con-
firm the function selection. The main measurement value
and the secondary measurement value will be shown on
the display including the decimal point and the associated
units. The resolution of the main measurement value dis-
play (L, C, R, G, Z or Y) consists of one, or two or three di-
gits before the decimal point and four, or three or five di-
gits after the decimal point. The resolution of the secon-
dary measurement value display (D, Q, R, B, X or Θ) con-
sists of one, or two or three digits before the decimal point
and four, or three or five digits after the decimal point. The
depiction OVERRANGE will be shown on the display if the
measurement value is located outside the set measure-
ment range.
- ) as well as the
28 39
6.1
The # symbol in front of a measurement value and the %
symbol following a measurement value indicate that the
relative measurement value deviation ∆ % (in percent) of
the measured L, C, R, G, Z or Y measurement value, or of
the D, Q, R, B, X or Θ measurement value of a stored mea-
surement value (reference value) is displayed.
6.2
The # symbol in front of a measurement value indicates
that the absolute measurement value deviation ∆ ABS of
the measured value, similarly to ∆ %, of the stored mea-
Value Display
to use the SETUP and the set-
3
If the bridge shows a negative value on the display, make sure to
check the measurement frequency, the measurement voltage and
possibly the phase angle of the component. For instance, if the
phase angle of a capacitator is close to 90°, it could result in a
negative display value due to the measurement accuracy. For in-
stance, negative values may occur for coils with cores (erroneous
measurement due to magnetization).
Relative Measurement Value Deviation ∆ %
(#, %)
Absolute Measurement Value Deviation ∆ABS
(#)