Precision Measuring Instrument
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価格:
R.F.Q
Model 2755 measures resistances from 1 Ω to 10 MΩ by operation of dials and switches. Batteries and a galvanometer are self-contained. The front control panel is provided with power and galvanometer circuit selectors, one ratio arm, and four measuring dials.
Model 2755 is also equipped with a Murray and Varley Loop Tester for convenient location of line faults such as "shorts" and "grounds" in power, telephone, telegraph, and signal cables.
No auxiliary attachment required
Galvanometer with a built-in protection circuit
Compact, lightweight (2 kg)
Built-in Murray & Varley loop tester
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Specifications
| Dimensions | 226（W）×182（H）×92（D）mm, excluding protrusions 8.90 × 7.17 × 3.60 in. |
|---|---|
| Weight | Approx. 2.0kg 4.4 lbs |
| Measuring Range | 1.000Ω to 10.00MΩ |
| Measuring Arm | x 1mΩ, x 10Ω + 10Ω x 10 + 100Ω x 10 + 1000Ω x10 (min. one step: 1Ω) |
| Ratio Arms | x 0.001 x 0.01, x 0.01, x 0.1, x 1, x 10, 100, x 1000 (M10, M100, M1000 Murray & Varley loop testing) |
| Accuracy | Range, ±0.1% of reading on 100Ω to 100kΩ Range, ±0.3% of reading on 10Ω to 1MΩ Range, ±0.6% of reading on 1Ω to 10MΩ Range |
| Temperature Coefficient of Resistance Elements | ±0.5 x 10-5 /°C at ambient temperature of 5 to 35°C (41 to 95°F), ±2 x 10-5 /°C at ambient temperature of 20 to 35°C (68 to 95°F) |
| Galvanometer (Built-In) | Sensitivity 0.9 μA/div, Internal Resistance - Approx. 150Ω, External Critical Damping resistance - Approx. 800Ω, Period - within 1.5 Seconds |
| Galvanometer Power Source | Three 1.5V batteries (built-in) |
| Operating Temperature Range | 5 to 35°C (41 to 95°F) |
| Humidity Range | 85% Max., Relative Humidity |
| Outer Case | ABS Resin |
| Current Rating | 0.01A at x 10 (1000Ω) 0.1A at x 1 (100Ω) 0.3A at x 0.1 (10Ω) 10A at x 0.0001 (0.01Ω) 1A at x 0.01 (1Ω) 3A at x 0.001 (0.1Ω) |
| Accessories Supplied at No Extra Cost | Carrying Case |