3-channel crack tracker – 20 AMP SF3/20

Applications

For homogeneous, electrically conductive materials

Measurement of the length of through-cracks propagating in thin metal sheets

Determination of the crack front shape inside thick test specimens (three-dimensional application possible in certain cases)

The device essentially performs three functions:

> Supplying current to the test specimen,

> Triggering the measurement,

> Amplifying and measuring the voltage across the test specimen (3 channels).

Current intensity applied to the test specimen	Adjustable from 0 to 20 A
Pulse width	Adjustable from 0 to 200 ms
Pulse frequency	Adjustable from 0 to 150 Hz (for a 4-ms pulse)
Operating modes	Internal Pulse, Sector Pulse, External Pulse
External signal input	±10 V
Gain	From 0 to 20,000
Trigger threshold	0/20 V
Delay times	From 0 to 200 ms, for mains or external pulses
Current stability	10?³
Measured voltage	0 to ±10 V
Measurement Channels	3, including 1 that uses the other 2 as inputs (A-B) and (A/B)
Output Current	5 mA
Measurement Channel Response Time	0.2 to 1 s
Variable Gain	Via multiplier knob, 0 to 20,000
Supply Voltage	220 V ± 10 V% 50 Hz
4-contact male connector	JAEGER Rapid 530 754, test lead
3-contact female connector	JAEGER Miniature 530 232, channels
Cable clamp	JAEGER 530 331