325 Precision Calibrator
The Model 325 precision calibrator supplies high accuracy millivolt-per-volt level signals for testing, calibrating, and troubleshooting process weigh system instrumentation.
Precise output reference selections from 0 to 3.5mV/V are achieved by using a metal film resistor network; discrete wire wound resistors, and a 2-pole, 8-position rotary switch. Input and output impedance values of 350, 700, and 1000 Ω are selectable to simulate all typical strain gage transducers.
- ◉ Portable, on-site calibration and servicing—accurate to 0.02% of selected range
- ◉ Eight selectable ranges: 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 and 3.5 mV/V
- ◉ Three bridge impedance selections: 350, 700, or 1000 Ω
- ◉ Calibrate any strain gage based instrument or transmitter
- ◉ Rugged, impact resistant aluminum case
- Testing, calibrating, and troubleshooting process weigh system instrumentation
| PARAMETER |
VALUE |
| PERFORMANCE |
| Output Accuracy |
0.02% of selected range |
| Accuracy Stability (0.5 and 1 mV/V steps) |
less than 0.01% in 24 hours less than 0.02% in 1 year |
| Zero Stability |
less than 3 μV |
| Span TC |
±10 ppm/°C |
| Input Impedance (Excit.) |
adjustable to ±0.05% |
| Output Impedance (Signal) |
adjustable to ±0.08% |
| Output Ranges |
8 steps: 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, and 3.5 mV/V |
| Input Voltage Level |
25 VDC maximum |
| Operating Temperature Range |
32°F to 120°F (0°C to 50°C) |
| Vernier Range |
up to 106% of selected step |
| Impedance Adjustmen |
350, 700, or 1000 Ω |
| MECHANICAL |
| Dimensions, LxWxH |
6 × 3.2 × 1.8 in. |
| Unit Weight |
15.7 oz |