BK Precision MDL4U Series, Руководство пользователя

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Introduction 15
1.7.6 Reverse Voltage Protection (LRV/RRV)
This function protects the electronic load in case the input DC voltage lines are connected with the wrong polarity. When
a reverse voltage (LRV – local reverse voltage, RRV – remote reverse voltage) connection condition is detected, the input
will immediately turn off, the buzzer will alarm the user, and the status register’s reverse voltage (LRV/RRV) and VF
bits will be set. The mainframe will display LRV/RRV until they are reset.
In this condition, the 8-pin connector’s VF pin will output a high level. You can disconnect the power supply via this
signal (see Figure 4.16 ).
Operations to Clear the Reverse Voltage State
Check whether the connection is reversed. If so, disconnect the device to be measured to clear the reverse voltage state.
1.8 Menu List
The following menus can be viewed on the VFD display. Use the keys to scroll through the menu list. Press the
Enter key to enter the selected menu function. Use the keys to scroll through the VFD screen and press Enter
key to enter its submenu. Press Esc to go back to the previous menu selection. Pressing number keys can directly select
a channel.
Press the the
key to enter the Setup menu.
Setup
MODE Select working mode
CONST CURRENT
Load works in CC mode
CONST VOLTAGE Load works in CV mode
CONST RESISTANCE Load works in CR mode
CONST POWER Load works in CW mode
CONST IMPEDANCE Load works in CZ mode
CC/CV RANGE Switch the range
HIGH RANGE Set high range
LOW RANGE Set low range
I / V / R / W SET Set the working current/voltage/resistance/power value
Vmax/Amax Set up the maximum voltage/current limit for Automatic test mode
Vmin/Amin Set up the minimum voltage/current limit for Automatic test mode
∫
= 2.500A/us Set the rising slew rate (only in CC mode)
∫
= 2.500A/us Set the falling slew rate (only in CC mode)
TRAN A = 0.00A Set up level A value
Ta = 0.0005S Set up level A width
TRAN B = 0.00A Set up level B value
Tb = 0.0005S Set up level B width
T MODE Set up the transient mode
CONTINUOUS Continuous
PULSE Pulse mode
TOGGLE Toggle mode
RLC R = 7500.0Ω Set up the resistance value
RLC L = 0uH Set up the inductance value
RLC C = 10uF Set up the capacitance value
EXIT Exit the setup menu
Table 1.5 Setup Menu