Dresser Roots Model 5 Prover Manual - The Meter and Valve ...

9. Calibrating the ProverThe Model 5 Prover comes from the factory with all components calibrated and the Model 5 Prover tested asa complete system. It is recommended that the calibration be checked twice a year. Listed below are the eightcomponents that require periodic calibration. It is suggested that all components be recalibrated at one time,but any of the components can easily be calibrated individually or in any combination.• Atmospheric Pressure Transducer• Master Meter Inlet Pressure Transducer• Field Meter Inlet Pressure Transducer• Master Meter(s) Temperature Probe• Field Meter Temperature Probe• Master Meter Outlet Pressure Transducer• Field Meter Outlet Pressure Transducer• Analog to Digital Converter Check PointThe configuration files CALIDATE.CFG and CALIBR.CFG contain the unique calibration informationfor each individual Model 5 ROOTS Prover. Refer to Calibration and Preset Files in the Help Index() for more information on these critical files.9.1 Reaching the Prover Calibration Screen:1. At the upper left of the Main Menu screen, click on Prover Operations and selectProver Setup from the drop down menu, or press .2. Enter the Level One password. The factory-installed Level One password is ROOTS, in allcapital letters. Press .3. The Set Prover Options screen will appear. From the upper left of this screen, click onProver Operations and select Calibrate Prover, or press .4. Enter the Level 2 password. The factory-installed Level 2 password is DRESSER, in allcapital letters. Press .5. The Display Calibration Dates and Constants screen will appear. Each of the eight componentsthat require periodic calibration are listed. Next to each is shown the current numerical settingof the component - the “Calibration Constant” - and the most recent calibration date. If allcurrent calibration settings are fine, press and you will be returned to the Set ProverOptions Screen. If calibration of any or all of the components is required, press , and thefirst Prover Calibration Screen will appear.By default, the Calibrate A/D Converter Check Point screen will appear first. Use the up/down arrows tothe left of the component name to navigate though each of the individual component calibration screens.A controller error message will appear if the computer cable is not connected to the controller and/or thecontroller power is off.Use of a comma instead of a period in numerical entries during calibration can cause an erroneouscalibration and/or a corrupted calibration file.31