Ask the experts

December 1, 2015


Question We are replacing our differential accelerometers with 7703A’s that have single-ended outputs. We are also using 2777A differential charge amplifiers. Can I use the 2777A with the 7703A, or do I have to replace the charge amplifiers? Answer Yes. You can make the differential input into a single-ended input by connecting Pin B, of […]


November 1, 2015


Question I recently purchased a new 2775B with filter module installed. I noticed that the connectors on the motherboard and filter module are significantly different from my older units. What has changed about this unit and the plug-in modules? Also, what support do you offer for the older 2775B units and filter modules with the […]


September 1, 2015


Question I have a Model 133, which has selectable IEPE current limits of: 0, 4 and 10 mA. I have an application that requires a longer cable length and a higher bandwidth, which can only be met with an IEPE current level of 18 to 20 mA. Is there a modification that can be made […]


August 1, 2015


Question Data Sheets of Endevco pressure transducers are detailed, identifying the contribution of various factors to the total measurement error. What I would like to know is the total error in the case of a measurement I am currently carrying out. So in other words: how can I calculate the total error of the transducer […]


July 1, 2015


Question I have two types of piezoelectric accelerometers: IEPE and straight charge type. I am new to using charge type accelerometers. I purchased an Endevco 133 signal conditioner some time ago to make vibration measurements with IEPE modal accelerometers. I am now required to make measurements in test locations with higher temperatures (500°F) and will […]