HMC Electronics MDL Series BK Precision DC Electronic Load System Module User Manual
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V
S
L s
R s
R
L
C
L
＋
－
Is
Figure 21 - Constant Impedance Mode
Ranges
When working in CZ mode, you can press the Setup key to enter the RANGE menu. Two
overlapping ranges can be selected: LOW RANGE or HIGH RANGE. Impedance can be edited in
either of the two ranges. Low range will supply higher accuracy and better resolution when you set
lower impedance. If any value you set is outside the maximum value of the LOW RANGE, you
should select HIGH RANGE. If the electronic load is in remote control mode, you can use the
IMP:RANG command to switch impedance range.
Immediate Impedance level
Set the impedance level via the front panel. If the load is in CZ mode, the new impedance level
setting immediately changes the input. If the load is not in CZ mode, the impedance level setting
will be saved for use until mode is switched to CZ mode. You should select the channel to be edited
before setting impedance parameters. Press the SETUP button to enter CZ mode. After choosing
the high-low range, the front panel will display the following:
Rset: set the impedance value (R
L
)
Vmax: set the maximum voltage
Vmin: set the minimum voltage
RLC R: set the series resistance value (Rs)
RLC L: set the series inductance value (Ls)
RLC C: set the parallel capacitance value (C
L
)
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(800) 482-4440