The item is the Calibratory D-105 DC, 10.0VDC Precision Voltage Reference Standard. It accepts 12VDC to 35VDC INPUT. The OUTPUT is 10.000000 VDC ±0.0002% (±2ppm) at 14.5VDC (+-2.0VDC) INPUT. The other unit we have listed—The D-104 DC—is a +-0.0006% (+-6ppm) unit. That, temperature-control, and the price, are the only difference between this unit: the D-105 DC and our novice product, the D-104 DC. The D-105 DC has (4) four color-coded, gold-plated banana-sockets w/binding posts for INPUT and OUTPUT connections. The internal connections are soldered or bolted. The regulator IC is socketed, so it is not heated by soldering. We incorporate the precision voltage reference IC—TI REF102C—together with noise filtering, thermoelectric damping, and a trim circuit. Among the photos is a laboratory null voltage-offset setup. The reading is on the mVDC range. The meter reads: 0.0092mVDC (9.2uVDC; 0.92ppm). That is the maximum difference between the 732A 10.000000VDC OUTPUT and the 10.000000VDC OUTPUT of the Calibratory D-105 DC Precision Voltage Reference Standard at its maximum actual error. Our claim of 6ppm at 10VDC is conservative! The null setup is as follows: Fluke 732A OUTPUT (-)ground(-) to OUTPUT (-)ground(-) on the Calibratory D-105 DC Precision Voltage Reference Standard. Power Supply 14.5 Volt DC (+) and (-) to INPUT of the Calibratory D-105 DC Precision Voltage Reference Standard; (+) 10.0VDC (+) OUTPUT of Fluke 732A to DMM (-) low (-); (+) 10VDC (+) OUTPUT of Calibratory D-105 DC Precision Voltage Reference Standard to (+) DMM (+). All units are nulled to a 732A or 732B Precision Voltage Reference. Recalibration is available anytime. The Calibratory D-105 DC Precision Voltage Reference Standard may also be powered by (2) 9V alkaline batteries wired in series. The device settles in roughly five minutes. Maximum output load is 8.0 mA. The unit is durable and maintenance-free. Long-term drift is ~1ppm/1,000 hours of use, and decreases with age. The unit measures approximately 1.5" x 2.25" x 1.75". Test equipment and patch cords are not included. Questions, use the link below. Thank you for viewing our eBay.com listing! We customize calibration parameters for free, i.e. input voltage, temperature, etc..
基准是TI REF102C |
发表于 2015-1-25 19:53:21
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