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Features / Accessories / Documents

DC Voltage Current Source

6½-digit working standard suitable for calibration High-accuracy and highly stable with bipolar output

The 6166 is a DC voltage/current source that uses a PWM system in the reference voltage generation block for high accuracy, high stability and high resolution.
The DC voltage can be output over a wide range of ±10 nV to ±1199.999 V and the DC current over a wide range of ±1 nA to ±119.9999 mA. Especially with its high stability for DC voltage source of 25 ppm per 90 days (typical value), the 6166 can be widely used for calibration of highprecision digital voltmeters or analog indicator instruments or as a generation source for a variety of tests.
n addition, the 6166 has a built-in function to generate thermal electromotive force of thermocouples according to the JIS table, enabling easy calibration of thermometers and other instrumentation systems.


DC voltage/current sourcing in 10nV/1nA steps
The output voltage normally can be set in four ranges of 0 to ±1199.999 V in the minimum 1 μV steps. When the divider voltage function is selected, it can be set in three ranges of 0 to ±1199.999 mV in the minimum 10 nV steps. This is ideal for the adjustment, test, maintenance and calibration of high-sensitivity devices and elements. The output current can be set in three ranges of 0 to ±119.9999 mA in 1 nA steps. Both a voltage limit and a current limit can be set for voltage sourcing (except divider voltage) or current sourcing. They can protect against damage caused by an operation mistake.

Thermal electromotive force output function
The 6166 has a function to generate thermal electromotive force of thermocouples according to the JIS table. Selecting the type of thermocouple and temperature to be generated will output voltage corresponding to the setting temperature. The type of thermocouple is selectable from eight types: T, J, E, K, S, R, B and N. The reference junction temperature can be set arbitrarily within a range from -270 °C to 120 °C. This function enables temperature calibration of thermometers and other instrumentation systems.

Smooth polarity switching by bipolar output
As the 6166 employs bipolar output, the source polarity can alternate between negative and positive without switching the internal relays. Consequently, even zero-crossing evaluation is made smoothly in a shorter time. While offering improved operability, the 6166 can be used free from the concern of the mechanical parts lifetime.

Greatly improved operating efficiency by program function 
The 6166 has a memory with the capacity of 1,000 data sets for the program function. Voltage, current, thermal electromotive force, temperature, voltage limit and current limit can be stored in this memory.  Any of these data can be output or the data from the first number through the last number can be scanned.

Expanded specifications for system use
The 6166 is equipped with the GPIB and USB interfaces. The BCD parallel interface that is installed on the former model 6161 is also available optionally. In addition to the TRIGGER IN signal input for starting the output voltage or current saved in the program memory, the INTERLOCK signal input for controlling the output status by a foot switch, etc. is newly added in consideration of voltage sourcing up to 1200 V, thereby securing easily the safety control.

Number of digits for generation
Output method Bipolar
Maximum output

±1200 V / ±12 mA 

Voltage source range

±10 nV to ±1200 V

Voltage source accuracy (typical value)  0.0035 %
Current source range

±1 nA to ±120 mA 

Current source accuracy (typical value) 0.0055 %
Thermal electromotive force output function

-220 ℃ to +1820 ℃ (resolution: 0.1 ℃)

Output noise (typical range)  3 mVp-p 
Settling time 1 s or less
Interface GPIB, USB,  BCD (factory option)
Memory 1,000

*For the detailed specifications, please download the brochure from "Documents."