The 17501A Recorder Plug-In is for use in the 7100, 7101 series recorders. Offers high input resistance (1 Mohm @ null in all fixed calibrated spans). Sensitivity of 1 mV to 100 V in 10 steps with an accuracy of ?0.2% of full scale and a continuously variable span control. Reference stability: 0.005%/?C and a front-panel CAL adjust is also provided.