C50 Portable Multifunction Calibrator


The Wahl C50 Calibrator integrates all the necessary functions for calibration and maintenance of processes, making it an ideal instrument for maintenance, quality control, and calibration.  With ergonomic design and embedded software, the C50 is an easy-to-use, high performance calibrator.

The C50 is capable of simultaneously measuring and generating voltage, current, frequency, resistance signals, resistive probes, and thermocouples - on two isolated channels. Wide, high contrast backlit display is excellent for use in low ambient light conditions.

The unit is rated IP54 and protected by an anti-shock boot.  Polycarbonate keypad protects the unit from dirt and grease, and the raised keys allow the C50 to be easily used while wearing gloves. Ten user programmable configurations are available for use with repetitive jobs.

Unique quick connect system is easy to use; simply press down on the top of the terminal and insert bare wires (up to 3 millimeters or 10 AWG) or compensated thermocouple connectors.  When releasing the terminal, wires are held tightly between two brass plates for thermal stability, creating excellent cold junction compensation for thermocouples.  This systems also allows for the use of 4 millimeter banana plugs or safety plugs to be connected to the front panel.

The C50 allows the following physical values to be measured and simulated:

  • Voltage
  • Current
  • Resistance
  • Temperature, via resistive probes and thermocouples
  • Frequency, for frequency signals and dry contacts.

These functions allow scaling of process signals and corrections to temperature probes. The C50 is compatible with HART transmitters by inserting a 250 ohms resistance, allowing uninterrupted data transfer. Data can be stored and sent to PC for analysis.

The dual display simultaneously shows measurement value, emitted value, gauges, and used functions.

Selectable resolution allows the user to adjust in order to meet specific testing requirements. The top line displays date, time, and external temperature.  While measuring average, maximum, minimum, and the number of measurements are shown on the left of the screen. During emission the left of the screen will display ramps, steps, and constant value emission functions.  Access drop-down menus using the navigator.

View the spec sheet for complete information on this item.




File Menu: Save up to 10 full configurations of the instrument, and recall them as desired.
Contrast Adjustment


Rechargeable NiMH Batteries.

Battery Life

5 to 10 hours depending on functions used


Screen backlighting is adjustable to save battery life


Allows process signals to be displayed in a percentage of full scale (or in all other units), during measurement and simulation. Allows sensors to be corrected after a calibration.

Relative Measurement

Programming of a reference value different from the one of the instrument (NULL function).
Subtracting of constant value by measuring or by programming from a measured value (TARE functions).

Square Root

Takes into account a quadratic signal coming from a ΔP transmitter.

Statistical Functions

Average, Minimum, Maximum, and number of measurements done are always displayed. Reset key allows values to be updated.


Five user selectable languages: English, French, Spanish, German, and Italisn.

Display Resolution

User selectable to allow measurements to meet specific testing requirements.

Maximum Ambient Conditions

-10° to 55°C, 10 to 80% Relative Humidity


1.9 pounds (900 grams)


8.3 inches x 4.3inches x 2.0 in. ( 210mm x 110mm x 50mm)

Included Accessories

Protective boot, six testing leads with alligator clips, quick charging battery system, neck/shoulder strap, stand for desktop use, and user manual.

Simulation Menu

Simulation value is set by entering value on keypad or using the cursor to change the appropriate digit.

Ramps Generation

Starting, ending, and length of time values of simple or cyclic ramps can be simulated. The number of ramps can be adjusted in case of cyclic ramps for any signals.

Steps Simulation

2 modes provided: Program mode and manual mode.
In program mode, select the starting value, number of steps, and the duration of the step.
In manual mode, the user has approximately one hundred preset values.
In current simulation the user will have additional preset values in function of range and according to 0%, 25%, 50%, 75%, and 100% from the selected gauge.
Choice is made between gauges: 0-20mA, linear or quadratic OR 4-20mA, linear or quadratic.


100 programmable values allows complex curves to be generated.

Transmitter Function

Measurement input is copied into the output with scaling.

IP Rating

IP 54

NIST Traceable Calibration Available?



One Year

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