Multimeter with Capacitance Measurement, Transistor Oscillator

Sanwa CX506a Analog Multimeter

The Sanwa CX506a is a versatile and portable analog multi-tester, expertly designed for professionals and hobbyists who require precise measurements for low-voltage circuits and home electrical appliances. Its robust design and wide array of functions make it an indispensable tool for detailed electronic work.

Key Features

• High-Sensitivity Taut-Band Meter: At its core, the CX506a utilizes a high-sensitivity taut-band meter movement (15μA DC) with an internal magnet system. This technology is more resistant to shock and vibration than traditional pivot-and-jewel meters, ensuring greater durability and sustained accuracy over time.
• Comprehensive Measurement Capabilities: With 26 selectable measurement ranges, this device offers exceptional versatility. It can accurately measure:
  • DC Voltage: Up to 1000V with a high input resistance of 50kΩ/V, minimizing the effect of the meter on the circuit under test. Accuracy is rated at ±2.5% of the full scale.
  • AC Voltage: Up to 750V with an accuracy of ±3.0% of the full scale.
  • DC Current: From as low as 30µA up to 0.3A.
  • Resistance: Across five ranges, from 5kΩ up to 50MΩ.
  • Capacitance: A standout feature is its ability to measure capacitance using a built-in transistor oscillator. It covers a wide spectrum from 50pF to 2000µF across three ranges.
• User-Friendly Functions: The CX506a includes several features designed for convenience and efficiency, such as a polarity reversal switch for DC voltage and current measurements, which saves time by eliminating the need to swap test leads. It also has a transistor check function to test the DC current gain (hFE) of bipolar junction transistors (BJTs).
• Durable and Safe Design: Housed in an all-plastic rigid body, the CX506a is built to withstand regular use. For safety, it includes a replaceable ceramic fuse (0.5A/250V) to protect the internal circuitry from overcurrents.

Technical Specifications

DC Voltage (DCV) | 120mV, 3V, 12V, 30V, 120V, 300V, 1000V | ±2.5% of full scale (±4% on 120mV)

AC Voltage (ACV) | 3V, 12V, 30V, 120V, 300V, 750V | ±3.0% of full scale (±4% on 3V/12V)

DC Current (DCA) | 30µA, 0.3mA, 3mA, 30mA, 0.3A | ±2.5% of full scale (±3% on 30µA/0.3mA)

Resistance (Ω) | 5kΩ, 50kΩ, 500kΩ, 5MΩ, 50MΩ | Within ±3% of arc

Capacitance (C) | C1: 50pF–0.2µF, C2: 0.01µF–20µF, C3: 1µF–2000µF | C1/C2: ±6% of arc, C3: Approximate value

DC Current Gain (hFE) | 0 to 1000 | Approximate value

Frequency Response | 40Hz to 30kHz (for ACV ranges ≤12V) | Within ±3%

Power Source | 2 x R6P (AA) 1.5V batteries, 1 x 6F22 (9V) battery

Built-in Fuse | Ø5x20mm Ceramic Fuse (0.5A/250V)

Dimensions & Weight | 165mm (H) x 106mm (W) x 46mm (D) / Approx. 370g

Package Contents

The Sanwa CX506a comes ready to use with a complete set of accessories:

• Two Test Leads (TL-21a)
• One Clip Lead (CL-506a) for hands-free capacitance testing
• Instruction Manual
• One Spare Fuse (0.5A/250V)