PosiTector RTR, Testex
How to measure surface profile using Testex Replica Tape and the PosiTector RTR
Testex Press-O-Film replica tape is simple, affordable, and one of the most popular methods for measuring surface profile. It works on both flat or curved surfaces and offers the option of retaining a physical replica of the surface. It is the only surface profile test method recognized by ASTM, ISO, and AMPP standards.
The PosiTector RTR Replica Tape Reader features a unique spring-loaded design that applies a precise amount of force to the replica tape, no matter how hard the buttons are pressed. Its large digital display provides clear, easy-to-read measurements, and stored data can be seamlessly transferred to the included PosiSoft software for automatic generation of custom professional reports.
Along with the Testex Digital Micrometer, the PosiTector RTR features an exclusive Conversion Mode which ensures the most accurate surface profile measurements.
Each PosiTector RTR H probe arrives fully calibrated with a traceable long form certificate of calibration. The award-winning PosiTector platform is also versatile. By simply switching probes, the same gage body can transform from a replica tape reader into a coating thickness gage, dew point meter, soluble salt tester, hardness tester, gloss meter, or ultrasonic wall thickness gage.
There are four grades of Testex replica tape available, depending on the expected surface profile height: Coarse, X-Coarse, X-Coarse Plus, and Coarse Minus.
Before measurement, it is important to clean the anvils. Swipe the included cleaning card or clean sheet of paper through the probe opening a few times while firmly pressing both probe buttons.
To power-up the gage, press the center menu button. When prompted, zero the probe by simultaneously pressing both probe buttons firmly until the Gage beeps and the arrows point outward. Unlike analog spring micrometers, the PosiTector automatically subtracts the two-mil, or fifty-micron, thickness of the incompressible substrate.
Before measuring, verify the instrument is operating correctly by measuring the included check shim. Make sure the reading falls within the combined tolerance of the instrument and shim. For best accuracy, ensure Conversion Mode and the applicable Tape Grade is selected in the Cal Settings menu.
The PosiTector RTR is ready to measure. Insert the burnished replica into the probe opening so that the measurement anvils are aligned over the burnished area of the tape with the adhesive side down.
Once positioned, firmly press both probe buttons simultaneously and hold until the instrument beeps and the surface profile measurement is displayed. A constant anvil pressure is applied to the replica tape regardless of how hard the buttons are pressed.
At least two measurements should be taken at each location, and averaged. If the two replicas differ by more than 5 µm (0.2 mils), take a third measurement, and record the average of the two closest values.
Once measurement is complete, connect the PosiTector RTR to the included PosiSoft Desktop software using the supplied USB cable to archive and manage measurements. PosiTector Advanced models also feature WiFi connectivity to synchronize readings with PosiSoft software. Easily create Professional, custom reports from your measurement data in seconds using the PosiSoft Desktop Report Generator.
For more information on the PosiTector RTR visit defelsko.com/rtr.