Displacement Transducers
Auto Warning Tell Tale
Introduction
When bad separation exceeds certain value during depillaring operation roof fall is likely to take place. AWTELL01 is set to trigger at about 2mm less than specified value. When AWTELL01 starts blinking, the machine and personnel are withdrawn to safer place.
Back abutment pressure is not so dangerous. Front abutment pressure when it comes in depillaring working area it is dangerous.
Features
- It gives automatic visual indication when the movement of roof started exceeds safety level.
- AWTELL01 will protect the personnel and machinery from impending Roof fall.
- Movement of the strata is also indicated on the scale.
- Rapid and simple to install.
- Auto warning tell-tale can be installed at different depths.
Specifications
| Parameter / Type | Specifications |
|---|---|
| Type | Single Height Auto Warning Tell-Tale |
| Anchor | 15 Meters |
| Scale | 0-30 mm |
| Least Count | 1mm |
| Capable | in heavy moisture atmosphere |
| Trigger Level | 5mm- 30mm |
| Visual System | Two visual LED flashing warning system |
| Safety | Intrinsically Safe |
Instructions
- Drill hole using 43mm bit to the required height.
- Preset the auto warning tell-tale to the desired scale where auto warning is to trigger.
- Insert anchor of suspension cable to top of hole. User graduated purpose insertion rods to confirm anchor position. Tug wire to seat anchor.
- Keeping the suspension cable under tension, the reference tube can now be inserted into the bottom of hold. The reference tube should be pushed fully into the hold.
- Position tube fitted with indicator to the lowest point and crimp ferrule.
- Now the extension meter is ready for working. Movement of roof will be transferred to reference tube. When the roof movement reaches the pre-set scale auto-warning led will glow and start blinking.