Dear Ms. Girard,
Thank you for your interest in our product lines. Current ripple will not affect a voltage transducer. Voltage ripple will be filtered according to the 250 mS response time or 4 Hz filter. The temperature rating is based upon where the unit goes out of spec, however operation can be expected up to 70C. Temperatures above that can be accomplished by specifying a CR5310-200-EH which is more “rugged” and has higher temperature grade components, but the temperature coefficient must be taken into account.