Valhalla Scientific 2724A/CPR

Valhalla's 2724A Programmable Precision Resistance Standard has created a whole new "State-of-the Art" in resistance calibration methodology. Valhalla has the first and only fully variable, microprocessor based resistance synthesizer In the world. At last, metrologists are free from the hit and miss approach of calibrating resistance at discrete cardinal points
only and can now test full resistance linearity in increments as low as 1 PPM either manually or over the GPIB.

 The 2724A provides over 10 million lab standard resistance values ranging from 100 micro-ohm increments on the 120 ohm full scale range up to 11 gigohms maximum output. This vast array of precision resistance is made possible through the 2724A's synthesized output format which has been exhaustively field tested for full compatibility with virtually all types of digital and analog.

Option “CPR”
For applications requiring the utmost accuracy and full compatibility with spiking and switching type current sources {Le. (
JF 8502A) the option "CPR" is recommended. "CPR” stands for cardinal point resistance and is available in decade values from 100 ohms to 10 megohms. The "CPR" option includes UUT error computation capability as displayed on the lower of the two units shown above. Maximum current sink capability is reduced to 15 mA in the active mode with CPR installed.