Instruction Manual - Sierra Instruments

Sierra Instruments Instruction ManualSmartTrak ® 100 SeriesThe instrument’s maximum flow rate is also recorded on the data label (at the backof the instrument) and on the calibration certificate.You may select any full-scale value between 100% and 50% of the maximum fullscalevalue. If you select a new full-scale value, it will re-define the analog outputsof the instrument. The 20 mA signal and the corresponding voltage signal (5 or 10VDC) will now represent this new full-scale value.To change the full-scale value of your device, modify one digit or erase the currentvalue displayed and type in your desired full-scale value. When you are satisfiedwith your selection, press the enter key. The new full-scale value will appear in thewhite box. A few seconds later, the same value will appear in the yellow box in theupper half of the screen titled “Full Scale.”CAUTION: The Change Full Scale function allows you to re-range yourinstrument, but it is important to be aware of the limitations of this function.Changing beyond recommended values may require a new LFE or even flowbody be installed. If in doubt, select factory reset and both zero and spanvalues are reset to factory valuesHere are some guidelines to remember if you choose to modify the Full ScaleValue: Changing the full-scale value of the instrument does not affect the accuracyof the measurement. Instrument accuracy is a percentage of the original factoryfull-scale valueIf you enter a full-scale value beyond the instrument’s calibrated maximum range,the SmartTrak will automatically modify the full-scale to equal the factory fullscalevalue. Below 1% of the original factory full-scale value for a meter and 2%for a controller, your SmartTrak is programmed to read zero because the error in themeasurement may exceed the measurement itself.66