The Simco ST-4 Worksurface Tester Instructions cover setup, operation, battery charging, safety warnings and warranty details.
The Simco ST-4 Worksurface Tester is a portable instrument for measuring surface resistivity of ESD protective materials such as mats, floors and laminates. It provides surface resistivity readings from 10⁻¹⁰ Ω·sq and includes a built‑in voltage source, LCD display and LED indicators.
The manual includes safety notes, unpacking guidance, detailed setup steps (battery charging, measurement time configuration), operation procedures for surface resistivity and ground resistance checks, probe cleaning instructions, dimensional drawings, and the one‑year warranty terms.
| Surface Resistivity range | Ω/sq. |
|---|---|
| Mode | Standard Mode (Ohm per square, Surface Resistivity) |
| LCD display | Exponent display (one digit beyond the decimal point) |
| Measurement voltage | 10 V, 100 V |
| Accuracy | ±0.5 decade |
| Battery type | Nickel‑metal hydride |
| Dimensions (W×D×H) | 114 mm × 78 mm × 69 mm |
| Weight | Body 700 g, cable 25 g |
| Probe size | 50 mm length × 50 mm distance |
| Probe material | Special conductive rubber (≤0.02 Ω max.) |
| Operating environment | 15‑25 °C, ≤60 % RH |
Do not use the instrument in wet, oily, solvent‑containing or corrosive environments, keep humidity below 60 % RH, avoid radio‑wave noise, and handle the device carefully to prevent damage.
Wipe the probe with a swab lightly moistened with pure isopropyl alcohol, let it air‑dry, then repeat the test.