Key facts
- Brand
- Troxler
- Model
- 4640-B
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-07-09
Start here

Troxler 4640-B Thin-Layer Density Gauge Quick Reference Card
This document serves as a Quick Reference Card for the Troxler Model 4640-B Thin-Layer Density Gauge. It provides brief instructions on selecting measurement layer thicknesses, managing offsets for out-of-range measurements, and storing test data under specific project numbers.
The guide also details the startup procedure, including daily standard count requirements using a magnesium reference block to compensate for source decay. Additionally, it outlines site preparation steps for asphalt surfaces and explains how to adjust count times and date/time settings.
Troxler 4640-B specifications
| Maximum readings to average | twelve |
|---|---|
| Project number capacity | up to 12 digits |
| Station number capacity | up to 12 digits |
| Additional information capacity | up to 12 characters |
Source: Troxler 4640-B Thin-Layer Density Gauge Quick Reference Card
All Troxler 4640-B documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
The shortest path to a working setup, usually only a few pages.
Questions answered in these manuals
How do I select the layer thickness?
Press (THICK), enter the desired layer thickness, and press (START/ENTER).
From: Troxler 4640-B Thin-Layer Density Gauge Quick Reference Card
How do I enable the offset function?
Press (SHIFT) and (OFFSET), then press (1) to enable or change the density offset.
From: Troxler 4640-B Thin-Layer Density Gauge Quick Reference Card
How do I select the layer thickness?
Press (THICK), enter the desired layer thickness, and press (START/ENTER).
From: Troxler 4640-B Thin-Layer Density Gauge Quick Reference Card
How do I take a standard count?
Place the gauge on an air gap spacer over a magnesium reference block, ensure the source rod is in the SAFE position, and press (STD).
From: Troxler 4640-B Thin-Layer Density Gauge Quick Reference Card
