2560A Wide Output Precision DC Calibrator

The Model 2560A is a simple, precise and cost effective solution for calibrating DC measuring instruments such as analog meters, thermometers, temperature transmitters, data loggers and multimeters.  



The Gold Standard in DC Calibration

The 2560A features high-precision DC sourcing capabilities, versatility for several test applications, and a simple, easy to use interface. 

High Precision Sourcing

  • DC Calibrators feature highly accurate and stable outputs, allowing them to be used as trusted references during instrument validation or correction


  • Wider output ranges replace the need for using multiple calibrators with a standalone, convenient package
  • Perfectly suited for verifying data loggers, temperature controllers, thermometers, and multimeters, as well as analog panel meters
  • User-configurable settings for ramp and step functions, as well as deviation controls for verifying hysteresis 
2560A Calibration By Temp

Intuitive Interface

  • Features switches and dials for quickly and easily adjusting voltage, current, resistance, or thermoelectric force
  • Seven segment LED displays provide clear visibility 
  • Built-in interface for integration into an automated test system


The 2560A Precision DC Calibrator offers high voltage and high current generation and intuitive operation for the analog meters calibration.

  • Wide output range of voltage and current generation
  • Dials and switches for each digit and function
  • High accuracy, stability, and resolution
  • Various effective functions for analog meters calibration.

With output ranges of 100 mV to 1000 V and 100 µA to 30A, plus 10 different types of Thermocouples and Pt100 RTD, the 2560A can effectively solve the calibration requirements for DC Analog Meters and various temperature measuring instruments and controllers.

High Accuracy

DC Voltage: ± 50 ppm
DC Current: ± 70 ppm

At 1 V and 1 mA range, for 180 days, 10 ppm = 0.001%

High Stability

DC voltage: ±10 ppm/h
DC current: ±20 ppm/h

At 1 V and 1 mA range

High Resolution

5.5 digits, ±120000 count display
6.5 digits, ±1200000 count display*

*In the high resolution mode

Wide Output Range

DC voltage: −1224.00 V to +1224.00 V
DC current: −12.2400 A to +36.720 A

5 voltage ranges (100 mV, 1 V, 10 V, 100 V, 1000 V)
7 current ranges (100 μA, 1 mA, 10 mA, 100 mA, 1 A, 10 A, 30 A)
The maximum output is ±122.4% of range. An instrument’s 1200 V range can be calibrated.

Higher current output

To generate higher current than 36.72 A, two 2560As can be connected to double the output to 73.44 A.

2560A Higher Current Output

Calibrating and testing analog meters

Using the output divider and deviation

Calibrating two or more points is quick and simple. It is only necessary to preselect the number of required calibration points with the lower divider control and then use the upper control to step the output to the next calibration point. The deviation settings will then enable the output value and error of each calibration point to be displayed directly.

2560A Calibrating Testing Analog

Using the output divider and deviation preset

The deviation preset control can be used to move the output value in small increments (2 or 5% of the step between calibration points).

This means that it is possible to finely approach the target calibration point, either from a lower value or a higher one, without exceeding it. This is particularly useful when the friction (hysteresis) of the moving part needs to be taken into consideration. In this case the point is calibrated twice, once from a lower value and once more from a higher value and the final calibration result is the average of the two.

2560A Output Divider

Using sweep

Needle sticking tests can be performed with high repeatability. It is possible to stop at any point and sweep around it in fine detail.

2560A Using Sweep

Calibration and testing multimeters

In the high resolution mode up to 6.5 digits, it is possible to test and calibrate digital multimeters and resistance standards.

*Sweep, divider, and deviation are not available in high resolution mode.

2560A Calib And Test

Calibrating and testing temperature controllers

10 types of thermocouples and Pt100

The 2560A can calibrate and test temperature controllers and data loggers which use thermocouples and RTDs. 10 types of IEC thermocouple are supported. By setting a temperature value, the emf (electro-motive force) equivalent to the temperature is generated. A wide range of temperature controllers can be calibrated due to the high accuracy.

When using a Pt100 RTD, a set temperature value generates the equivalent resistance value. Calibration using the resistance value can also be performed by setting resistance instead of temperature.

2560A Calibration By Temp

RJC at output terminals

The 2560A has 3 RJC (reference junction compensation) modes. The “internal RJC mode” uses the output terminals of the 2560A as the reference point. The “External RJC mode” enables the user to choose a suitable Pt100 as a versatile external sensor. The “Manual RJC mode” enables a reference value to be manually entered.

2560A Internal RJC

2560A Connection Interface

2560A Comparison Chart

LCA Reduced energy, emission of CO2, NOx and SOx about 66% compared to the previous model.

PDFResults of Life Cycle Assessment

758917 DMM Measurement Lead Set

  • Set of 0.8m long red and black multimeter test leads
  • Used in combination with a pair of optional 758922 or 758929 alligator-clip adapters
  • 1000 Vrms, 32 Arms CAT II

257875 RJ Sensor

For reference junction compensation sensor. Pt100, 1.95 m

758921 Fork terminal adapter

  • 758921 Fork Terminal Adapters
  • For fitting a 4mm banana plug to a fork terminal
  • One black and one red clip
  • 1000 Vrms-CAT II

758922 Small Alligator-Clip Adapter 300V

Rated at 300 V. Attaches to the 758917 test leads. Sold in pairs.

758929 Large Alligator Clip Adapter 1000V

  • Yokogawa 758929 Alligator Clip Adapter 
  • Rated at 1000V
  • Attaches to 758917 test leads
  • Sold in pairs black/red

758933 Measurement lead

2 pieces (red and black) in 1 set
length: 1.00 m
Used in combination with the 701959, 758921, 758922, or 758929
Rating: 1000 V CAT III/19 A

B8506WA Measurement Lead Set

2 pieces (red and black) in 1 set.
Length: 1.5 m, Rating: 80 A

B8506ZK Measurement Lead Set

2 voltage output cables (red and black). 1 m. Rating 1500 V

B8506ZL Alligator Clipadapter Set

2 safety terminal - alligator clip adapters (red and black). Rating 1500 V

751535-E4 Rack mounting kit

RACK MOUNTING KIT For an EIA-compliant Single-housing Rack

751535-J4 Rack mounting kit

RACK MOUNTING KIT For an JIS-compliant Single-housing Rack


DC Calibrators are versatile devices that span a wide range of applications

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