Knowledge to assist you can be found in our products' operating instructions. WIKA – Your partner for pressure, temperature and level measurement. Digital Pressure Gauges Calibration .Here you can find the operating instructions of our pressure gauges for download. WIKA – Your partner for pressure, temperature and level measurement.Use keys on the Home screen to control gauge operation Appendix C: Manually estimate Flow if required test pressure cannot be reached.1.2 Temperature – Refer to Section 2 of this manual for important information concerning temperature related limita- tions of pressure gauges, both dry and liquid .This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits provide .