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6540 4チャンネル直流電圧・電流源/モニタ 4-Channel DC Voltage Current Source/Monitor

4-Channel DC Voltage Current Source/Monitor
6540 / 6541

  • Source and measurement range
  • Voltage: 0 to ±10 V, Current: 0 to ±500 mA
  • Maximum power of 5 W per channel
    (up to ±1 A for 4 channels)
  • Basic accuracy: ±0.02 %,
    Minimum measurement resolution: 10 μV / 10 pA
  • High-speed pulse generation with minimum pulse width of 50 μs
  • Sink-enabled bipolar output
  • Synchronous operation among channels or units (selectable)
  • Benchtop type 6541 with color LCD display and system-use type 6540 without display

The 6540 and 6541 are 4-channel compact DC Voltage Current Source/Monitors. The 6540 is a model designated for system use without a display, and is optimal for production lines or inspection lines. On the other hand, the 6541, that is a benchtop model equipped with a display and an operation panel, was designed for R&D use with the emphasis on visuality and operability.
The 6540/6541 comes with a USB interface and external control signals for synchronization among units or devices. Optionally, GPIB and LAN interfaces are available on the 6541 only.

GPIB(Option)LAN(Option)

Features


Source and measurement functions

Voltage or current source, and voltage, current or resistance measurement can be selected by specifying the source and measurement functions. The LO terminals internally connected.  

6540/6541 Source and Measurement Function

Output range

6540/6541 Output Range

Voltage: 0 to ±10 V
Current: 0 to ±500 mA
The source range is common to 4 channels. The maximum current
for 4 channels is up to ±1 A

Operating temperature range
A: 0 °C to + 50 °C (0.5 W/ch or less at current sink)
B: 0 °C to + 40 °C (2.5 W/ch or less at current sink)
C: 0 °C to + 35 °C (5 W/ch or less at current sink)

Voltage and current source modes

There are four voltage or current source modes; DC, pulse, DC sweep, pulse sweep. Then, the sweep modes are classified into four sweep types: fixed sweep, linear sweep, random sweep (arbitrary waveform generation by user programming), 2-slope linear sweep (linear sweep with step value switching).

The minimum pulse width is 50 μs. 
The minimum cycle is 500 μs, or 100 μs without measurement. 

6540/6541 Voltage and Current Source Mode

HI/LO limit separate setting

In voltage or current source, the HI/LO limit settings are very important. For current source, the limit (compliance) voltage must be higher than the applied voltage. When voltage higher than the limit voltage is applied from the outside, the instrument detects overload and sets standby. When a capacitor is discharged after being charged at a constant current with the positive and negative limits being set to the same value, overload occurs if the limit voltage is lowered. In addition, it is discharged down to negative voltage when applying reverse polarity current.

However, the 6540/6541 has a function that can set the HI and LO limits individually. Furthermore, for the voltage limit, both HI and LO limits can be set homo-polar. This prevents capacitors or batteries from being over-discharged. Also, it is suitable for evaluating devices such as LDs that are used at a constant current and do not tolerate reverse voltage application.

Suspend function

The 6540/6541 can select from three output OFF statuses; STBY (output relay OFF), HiZ (output relay ON and high resistance), and LoZ (output relay ON and low resistance). Consequently, unnecessary relay ON/OFF operations can be omitted. Using this function will prevent throughput reduction due to relay operating time, and extend relay lifetime dramatically, increasing product reliability.

In addition, the setting of a suspend voltage (voltage in HiZ and LoZ status) can prevent transient current from being generated when connecting voltage sourcing devices such as batteries.

Output OFF status Output relay Output status Current limit setting value
LoZ ON Vsus, low resistanc

VS: Setting current limit (IL)

IS: 30 digits in the setting current range

(100 digits for the 3 µA range)

HiZ ON Vsus, high resistance 100 nA
STBY  OFF Open
Vsus: Setting suspend voltage (default: 0 V)

Synchronous source and measurement

The 6540/6541 can synchronize measurements in the DC source mode, and sources and measurements in the pulse source or sweep source mode. Not only the same waveforms but also different waveforms can be generated or measured. Arbitrary master channel and slave channels are selectable.

【Setting example 1】

Master: ch1
(Pulse linear sweep)
Slave: ch2
(Pulse linear sweep)
Slave: ch3
(Pulse linear sweep)
Slave: ch4
(Pulse linear sweep)

【Setting example 2】

Master: ch4
(Pulse linear sweep)
Slave: ch1
(DC linear sweep)
Slave: ch2
(Pulse)
Slave: ch3
(Fixed sweep)

6540 standard control software

The 6540 has no control panel because of its system-use structure, but it has a control program so to be operated externally from a PC via USB. This software makes it possible the basic operations including source, measurement and limit control.

6540コントロール・ソフトウェア

Display screen

The home screen is selectable from two types: 1-channel display and 4-channel display. Also, each channel can be set by using soft keys and rotary knob.

【[1-channel view】
Displays various information such as source ranges, periods and integration time in addition to source voltage or current, measurement voltage, current or resistance, and limit voltage or current values.
【[4-channel view】
Displays source voltage or current, measurement voltage, current or resistance, and limit voltage or current values of all channels.
【Time setting view]】
Measurement time setting is very important for pulse or sweep measurement.
Using the time setting screen allows easier and more sensuous operations than former models.

Appearance


*Click to enlarge.
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