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Introduction to the Yokogawa CA71 Multifunction Calibrator
The Yokogawa CA71 Multifunction Calibrator is a compact, lightweight, and versatile device capable of simultaneously sourcing and measuring voltage, current, resistance, thermocouples (TC), resistance temperature detectors (RTD), frequency, and pulse signals with high accuracy. It features easy-to-use rotary switches, making it ready for immediate use by simply opening the carrying case and connecting the cables.
Features of the Yokogawa CA71 Multifunction Calibrator
- Power Source: The CA71 provides 4-20 mA steps and 24V DC power for transmitters.
- Output Divide Function: Simplifies percentage output calculations.
- Auto Step Function: Changes output values incrementally based on the divide output function settings.
- Online Communication (CA71): Features an optically isolated RS-232C interface.
- Scan Function: Increases or decreases output linearly with selectable rise/fall times of 16 or 32 seconds.
- Memory Function: Stores and recalls up to 50 sets of source and measurement values from the internal memory.
- Temperature Monitoring Function
Specifications Summary – Model CA71
| Functions | Details |
|---|---|
| Auto Step Function | 2.5 sec/step or 5 sec/step |
| Scan Function | 16 sec or 32 sec |
| Memory Function | Stores 50 value sets |
| Maximum Measurement Input | Voltage: 300 V AC, Current: 120 mA DC |
| Current Input Terminal Protection | Fuse: 125 mA/250 V |
| Earth Voltage of Measurement Unit | Maximum 300 V AC |
| Display Update Rate | Approximately once per second |
| Serial Interface | RS232 connection (sold separately) |
| Display | Segment LCD (76 mm × 48 mm) |
| Backlight | LED backlight, auto-off after 1 minute |
| Power Supply | 4 AA alkaline batteries or AC adapter (sold separately) |
| Battery Life | 12 to 40 hours (depending on usage conditions) |
| Auto Power Off Function | Approximately 10 minutes (can be disabled) |
| Applicable Standards | EN55011: 1998, EN61326-1: 1997 + A1: 1998, IEC61010-1, IEC61010-2-31 |
| Insulation Resistance | 500 V DC, 50 MΩ or higher |
| Withstand Voltage | 3.7 kVAC, for 1 minute |
| Operating Temperature and Humidity | 0 – 50°C, 20 – 80% RH (non-condensing) |
| Storage Temperature and Humidity | -20 – 50°C, 90% RH or lower (non-condensing) |
| Dimensions | 190 × 120 × 55 mm |
| Weight | 730 g (including batteries) |
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