625 Precision Calibrator
The Model 625 Precision Calibrator is a compact, high-accuracy, portable resistance network specifically designed to simulate the output of full bridge strain gage type transducers. Through the use of a highly stable resistance network, the calibrator provides an accurate method of simulating a 120-ohm or 350-ohm transducer system. This circuitry provides 55 precision mV/V output signals in five ranges of 11 settings each. When powered with a known regulated voltage, the calibrator can substitute for one or more transducers to check the calibration, linearity, sensitivity, or for general troubleshooting of an indicator, recorder, or a complete load or force measuring system. The Calibrator can also be used with a known dc or ac supply for checking and calibrating any millivolt or millivolt/volt instrument.
- ◉ Accurate to 0.05% of reading
- ◉ Precisely calibrates full bridge strain gage and transducer instrumentation
- ◉ Five ranges – 55 calibration points
- ◉ Test/confirm instrument peak/valley, auto tare, and auto zero circuitry+R83
- Precise calibration for 120- and 350-ohm systems
| Output Accuracy |
Each point accurate to 0.05% of reading, or 0.02% of range, or 0.003 mV/V, or ±2 mV, which ever is greater |
| Output Ranges |
0–0.5 mV/V in 10 steps of 0.05 mV/V each 0–1 mV/V in 10 steps of 0.1 mV/V each 0–2 mV/V in 10 steps of 0.2 mV/V each 0–5 mV/V in 10 steps of 0.5 mV/V each 0–10 mV/V in 10 steps of 1.0 mV/V each |
| Zero Stability |
Less than 2 μV |
| Calibration Stability Bridge Resistance |
Less than 0.02‰/year 120 Ω or 350 Ω Input |
| Voltage Level |
120 Ω: 0–12 VDC; 350 Ω: 0–25 VDC |
| Operating Temp. |
0–120°F (18–49°C) |
| Dimensions, HxWxD |
6 × 9 × 6 in. (152.4 × 228.6 × 152.4 mm) |
| Weight |
3.75 Ibs (1.7 kg) |