|
TDR-410 |
TDR-420 |
Measuring ranges |
7 m / 20 ft |
7 m / 20 ft |
Accuracy |
1% of selected range |
|
Resolution |
approx. 1% of range |
|
Minimum cable length |
4 m |
|
Velocity of propagation |
within 1…99% or 1…148 m/μs |
within 10…99% or 15…148.5 m/μs |
Output impulse |
5 Vp-p for an open circuit |
|
Output impedance |
25, 50, 75, 100 Ω |
25, 50, 75, 100, 125, 200 Ω |
Impulse width |
3 ns…3 μs (depending on the range) |
|
Scanning type |
2 scans/s or a single scan |
up to 3 scans/s |
Generated acoustic signal |
810 – 1100 Hz |
|
Operating time on a full battery |
up to 30 hours of continuous scanning |
up to 8 hours of continuous scanning |
Power supply |
4 x alkaline batteries 1.5 V AA type |
4 x alkaline batteries 1.5 V AA type |
Auto-off function |
1, 2, 3, 5 minutes or deactivated |
1, 5, 10, 15 minutes or deactivated |
Display |
graphical, backlit, 128 x 64 pixels |
colour 3.5” LCD TFT, 320 x 240 pixels |
Overvoltage protection |
400 V DC / 250 V AC |
|
Operating temperature |
-10...+50°C |
-20...+70°C |
Storage temperature |
-20...+70°C |
-30...+80°C |
Dimensions |
165 x 90 x 37 mm |
220 x 98 x 58 mm |
Weight |
350 g |
487 g |
Electromagnetic compatibility standards (EMC) |
EN 61326-1 |
|
Degree of protection / tightness |
IP54 |
IP67 |