While continuously striving to reduce measurement uncertainties, calibration laboratories are also under commercial pressure to reduce costs. Calibration equipment needs to be chosen not only for the uncertainty levels it can deliver, but also the range of uses to which it can be put. For accuracy coupled with versatility, no other standards laboratory DMM matches the superb performance of Wavetek’s Model 1281.
At the heart of the Model 1281, two specially conditioned 10-volt zener references are continuously inter-compared to minimize drift rate. Coupled with the DC input amplifier’s incredibly low 0.25 µV/°C temperature coefficient, this allows the Model 1281 to achieve a 10-volt range stability over a 1 year period and ±5°C temperature range of 3ppm. That’s as good as many Weston cells. And because the Model 1281’s temperature coefficient is far superior to a Weston cell’s, you don’t have to worry about precision temperature control.
| KEY FEATURES |
| Configurable for DCV, ACV, DCI, ACI and Ohms measurement |
| Dual inter-compared ‘Selfcal’ references for enhanced confidence levels — stability better than 3 ppm/year over a ±5°C temperature range |
| 81/2-digit DCV and Ohms, 61/2-digit ACV, 100% over-ranging |
| 10 GΩ input impedance (up to 20 V DC) and 10 nV input sensitivity |
| Special Ohms functions for ultra-high accuracy resistance measurements |
| Range-to-range and function-to-function ratio measurements |
| Simultaneous display of voltage and frequency |
| SPECIFICATIONS |
|
| Model: 1281 Overview |
|
| Model | Description |
| 1281 | 8-1/2 Digit Selfcal Digital Multimeter
(includes DCV, Ratio, Rear Inputs and IEEE-488.2 Interface
|
| OPTIONS |
|
| 10 | True RMS AC Converter |
| 20 | 2 wire and 4 wire Resistance Converter |
| 30* | Current Converter (only available with Option 20) |
| 50 | 10A Shunt |
| 70 | Isolated Analog Output |
| 80 | 115V, 60Hz Line Operation |
| 90 | Rack Mounting Kit |
NOTE:
* Requires Option 10 for AC Current Measurements
