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M520 Programmable Capacitance Decade

First generation programmable capacitance decade with RS232 interface and internal battery for up to 3 hours of on site calibration.

  • 0.25% accuracy, maximum voltage 50 V
  • Battery-powered
  • Remote control via RS232 bus

M520 Programmable Capacitance Decade is designed specifially for calibration of capacitance ranges of multimeters and RCL meters. As a predecessor of M525, the M520 is very similar in circuitry, providing same accuracy and comparable parameters for less. Sturdy mechanical knob design makes manual control pretty straightforward along with internal rechargeable battery make the M520 ideal for on site calibrations where grid power is not an option.


Even though the M520 looks mechanical, internal capacitance standards are switched electronically by relays. This way we could fit it with RS232 remote control so it can be used in Caliber or any other automated calibration solution.

Capacitance 100 pF - 12 uF
± 0.25% / year
Datasheets pdf
Manuals pdf
Remote control SW pdf

Versions & Options:

M520-V1000 base version with RS232
M520-Vxx1x 19" rack version, height 3HE
All Meatest instruments are available with 3, 4 and 5-year extended warranties.


RS232 adapter RS232-USB generic adapter
RS232 cable male-female RS232 cable, 2m