PC9A micro ohmmeter

PC9A micro ohmmeterIt is a digital instrument specifically designed for measuring low resistance, which can replace traditional DC double bridges (QJ42, QJ44, QJl03) and measure resistance within the range of 1 × 10-5 to 2 × 103 Ω. Suitable for measuring the internal resistance of various transformers and motor windings, wire resistance of wires and cables, contact resistance of switches, relay connectors, and other low value resistances.

PC9A micro ohmmeterAdopting imported integrated circuits, integrated A/D converters (analog-to-digital converters) and self calibrating operational amplifiers, it has the advantages of strong anti-interference ability, wide measurement range, clear readings, easy operation, and portability. The instrument is powered by a built-in lithium battery, which brings convenience to field and on-site measurements. Due to the use of lithium batteries, the cost-effectiveness of this product has been greatly improved, saving the cost of replacing dry batteries.

This product is equipped with a protection circuit, which can effectively avoid the impact of back electromotive force. Therefore, when measuring the DC resistance of windings such as transformers, it can ensure the safe use of the instrument.

Main technical indicators

1. The instrument is used under the following rated operating conditions:

(1) Temperature: 5-40 ℃

(2) Relative humidity: 20-80%

(3) There is no strong electromagnetic interference or corrosive gas around

2. Measurement range: 10 μ Ω -1999 Ω, divided into 6 ranges. The measurement range and resolution of each range are shown in the table below

Range 20m Ω 200m Ω 2 Ω 20 Ω 200 Ω 2000 Ω

Range 0~19.99 0~1999.9 0~1.999 0~19.99 0~1999.9 0~1999

Resolution 10 μ Ω 100 μ Ω 1m Ω 10m Ω 100 m Ω 1 Ω

3. The measured currents for each range are 625mA, 625mA, 100mA, 100mA, 10mA, and 1mA.

4. Basic error: Δ=± 0.1% Rx ± 2 words

In the formula, Rx is the measured resistance value, and the above Δ is guaranteed in an environment with a relative humidity of 60% ± 15% at 20 ± 1 ℃.

5. Additional temperature error: For every 10 ℃ deviation from the reference conditions, an additional basic error is added.

6. Maximum display: 1999

7. Unit display: m Ω and Ω

8. The instrument overload display is: 1999 flashing

9. The range can be switched between automatic and manual modes.

10. Power supply:

When selecting external power supply, the charger converts AC 220V to DC power supply of 8.4V and provides it. When selecting internal power supply, it is provided by the built-in lithium battery.

11. Dimensions: 240 × 105 × 285 (mm)

12. Weight: 2kg