Instructions for the Mahr Federal Pocket Surf IV portable surface roughness gage, covering operation, measurement parameters, controls, maintenance, and…
The Pocket Surf IV is a portable battery-powered surface roughness gage with a digital readout for laboratory, inspection, shop, or on-site use. This document is the instructions for the gage, describing its measurement parameters, controls, operation, and maintenance.
It covers specifications, battery installation and replacement, traverse lengths, probe positions, cleaning, and error messages E1–E4. The gage measures Ra, Ry, Rmax, and Rz and meets ASME B46.1, ISO, and DIN standards.
| Measuring range (Ra) | 1 µin to 250 µin / 0.03 µm to 6.35 µm |
|---|---|
| Measuring range (Ry, Rmax, Rz) | 8 µin to 999 µin / 0.2 µm to 25.3 µm |
| Display resolution | 1 µin / 0.01 µm |
| Measurement accuracy | Meets ASME B46.1, ISO and DIN standards |
| Digital readout | 3-digit LCD display, with “Battery” icon |
| Traverse speed | 2 in / 5.08 mm per second |
| Probe type | Piezoelectric |
| Maximum stylus force | 1500 mgf / 15.0 mN |
| Power | 9-volt consumer-type alkaline battery |
| Battery capacity | Approx. 2500 measurements |
| Operating temperature | 50° to 113°F / 10° to 45°C |
| Storage temperature | –4° to 149°F / -20° to 65°C |
It uses a 9-volt consumer-type alkaline battery; Duracell #MN/1604 and Eveready Energizer #522 or equivalent are suitable replacements, and non-alkaline or rechargeable batteries should be avoided.
A low battery is indicated by only the “Battery” icon being displayed, while a dead battery or no battery installed results in no display at all.
It indicates the displayed value was contaminated by three or more off-scale peaks or valleys; measure again with the probe at a different place.
E1 means the motor did not start, E2 means it failed to accelerate to proper speed, E3 means it failed to maintain proper speed, and E4 means excessive traverse length.