YOKOGAWA CA71 Multifunction Calibrator (HANDY CAL) | Simultaneous source and measure, TC/RTD, DC 30 V/24 mA output, 1 Hz–11 kHz

YOKOGAWA CA71 Multifunction Calibrator: Simultaneous Source and Measure

Overview

The CA71 is a YOKOGAWA handheld multifunction calibrator (HANDY CAL) that can simultaneously source and measure voltage, current, thermocouple, RTD and pulse signals, so there is no need to carry several instruments on site; functions are selected with a rotary switch. The 20 mA SINK function, used with an external 5–28 V supply, simulates a two-wire transmitter for loop testing. The CA51 in the same series lacks TC/RTD measurement and communication; available on request.

Key Specifications

• Source: DC voltage 100 mV / 1 V / 10 V / 30 V; DC current 0–24 mA (4-20 mA steps); 20 mA SINK; resistance 400 Ω; 10 thermocouple types, Pt100/JPt100; frequency and pulse
• Source accuracy: 100 mV range ±(0.02% + 15 µV); 20 mA range ±(0.025% + 3 µA) (23 ±5 °C, one year)
• Measurement: DC voltage up to ±110 V; DC current up to ±100 mA; AC voltage up to 300 V; thermocouple, RTD
• Measurement accuracy: 100 mV range ±(0.025% + 20 µV); 20 mA range ±(0.025% + 4 µA)
• Frequency and pulse: 1 Hz–11 kHz source and measure; pulse amplitude +0.1 to +15 V
• Functions: Divided output (n/m), auto step, sweep (16/32 seconds), 50-set memory, RS-232 communication (cable sold separately); built-in cold junction compensation sensor
• Power and battery life: 4 AA alkaline batteries or optional AC adapter; approx. 12–20 hours with simultaneous source and measure
• Dimensions and weight: Approx. 190 × 120 × 55 mm, approx. 730 g (including batteries)

Applications

• On-site calibration of temperature transmitters, indicators and controllers.
• 4-20 mA loop checks and flowmeter pulse testing.

Specifications per the YOKOGAWA CA51/CA71 General Specifications GS 77W02A01-01E and the CA71 product page (retrieved 2026-10-22).