1. Summary
TM7900 is a high-precision Calibrator for Flux Meter , which generates magnetic flux by a built-in high-precision Volt-second Generator (1Vs=1Wb). It calibrates flux-meters by comparing indicating value of the flux-meter with the value it generates. Compared with Mutual Inductance method, Volt-second method is featured with easier to use, better precision and traceability, it is applied for calibrate digital flux-meter and electrical integrator.
2. Features
• Accuracy: 0.005%, 0.01%, 0.02% or 0.05%.
• Built-in high-precision voltage source and timer.
• Generate magnetic flux by integrating voltage and time.
• Calculate and output voltage and time by setting magnetic flux value.
• Quick calibration in several seconds.
• Unit switch: mWb, Wb, Vs, mVs, Mx.
• Support setting interior resistance and wire resistance.
• Eliminate interior resistance’s influence by compensation.
• Large LCD screen and press-key.
3. Application
☆ Fast Calibration of Digital Fluxmeter |
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4. Specifications
4.1 DCV Output
Range | Accuracy ± (ppm of reading + ppm of range) [1] | |||
0.05 % | 0.02 % | 0.01 % | 0.005 % | |
2 mV | 200 + 200 | 100 + 100 | 50 + 100 | 20 + 100 |
20 mV | 200 + 200 | 100 + 50 | 50 + 30 | 20 + 10 |
200 mV | 200 + 200 | 100 + 50 | 50 + 30 | 20 + 10 |
2V | 200 + 200 | 100 + 50 | 50 + 30 | 20 + 10 |
Note [1] : (ppm = parts per million) (e.g., 10ppm = 0.001%). | ||||
• Regulating fineness: 0.005*Range, 0.001%*Range (0.005 %).
• Protective function: Short-circuit protection, Overload protection.
4.2 Adjustable Timer
Time output | Measurement Uncertainty (k=2), μs | |||
0.05 % | 0.05 % | 0.05 % | 0.05 % | |
0.1 s | 0.5 | 0.5 | 0.2 | 0.2 |
0.5 s | 0.5 | 0.5 | 0.2 | 0.2 |
1 s | 0.5 | 0.5 | 0.2 | 0.2 |
5 s | 0.5 | 0.5 | 0.2 | 0.2 |
• Pulse width output range: 0.1s ~ 5s
4.3 Standard Flux Output
Range | Measurement Uncertainty (k=2), ppm*RD + μWb | |||
0.05 % | 0.05 % | 0.05 % | 0.05 % | |
Combination of voltage and time | 500 +0.1 | 200 +0.1 | 100 +0.1 | 50 +0.1 |
• Flux output range: 0.1mWb ~10Wb, 7-dights display.
5. General Specifications
Power Supply | AC (220±22) V，(50±2) Hz |
Temperature Performance | Operating temperature: 0°C~50℃； Storage temperature: -20°C～70°C |
Humidity Performance | Operating humidity: 40%～80% R·H, no condensation Storage humidity : < 95% R·H, no condensation |
Weight | About 4 kg |
Communication Interface | RS232 interface |
Dimensions | 180mm(width) ×270mm (depth)×230mm (height) |
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6. Ordering Information
Advanced Multifunction Calibrator Advanced Electrical Reference Standards Electric Vehicle （EV）Charging Facility Tester AC/DC Standard Source /Meter Single-phase/Three-phase Standard Meter Magnetic Parameters Measurement and Calibration Magnetic Material Testing Equipment Electrical Steel Testing Equipment