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Test Electronics

SF-MATE   Short Finder Module All Data Aquisition Boards

Short Finder test instrument adds ICT capabilities
The SF-MATE (or Short-Finder), is a unique test instrument that adds ICT capability to Functional Test equipment. Rather than spending thousands of dollars to test all nodes on a PCB, the SF-MATE limits the number of checks to those defined as critical test points. For example, during a typical assembly process, a PCB inadvertently receives shorts in the lower section.
By verifying specific test points are "short free" (prior to applying power to the PCB), the SF-MATE can prevent damage to the DUT, adjoining test equipment and possible injury to the test Operator. The SF-MATE has 8 input channels that are connected to a special Ohm meter circuit. After a channel is selected, a constant current is supplied to the device-under-test and a voltage is measured that is proportional to the resistance. The Ohm meter limits the current source to 1mA, and the open-circuit voltage is just 200mV (which is less than the nominal turn-on voltage for most PN junctions). When the input exceeds a certain level, the SF-MATE outputs a digital bit that indicates a short .
Block Diagram
Data Acquisition Software
To ensure our customers receive the maximum benefit our products have to offer, we have prepared an extensive
Benifits and Feature Points

  • A flexible, low-cost alternative to traditional ICT test equipment
  • Functions both as a Short-Finder and Voltage Scanner
  • Can be used in fully automated test equipment
  • Great for embedded solutions - place inside mechanical test fixtures, instrument boxes or rackmount enclosures
  • Functional Test solutions
  • Automated Test Systems
  • QA/QC Quality Control
  • OEM Test Instruments
  • Verify “key” test points in <10msec
  • 8 DPDT relays isolate measurement
  • LED’s indicate on all active relay channels
  • USB interface or embedded control
  • Low cost
  • Compact size


Relays (K1-K10)
Relays 9
Relay type DPDT (Form C)
Coil Voltage +5Vdc
Nom. Switching Capacity 0.3 A, 125 VAC (Resistive Load) 1A, 30 VDC (resistive load)
Max. Switching Voltage 110 VDC, 125 VAC
Max. Switching Current 1A
Contact resistance 100mOhm max
Relay lifetime 100,000,000 operations
Actuation time 4ms max operate or release
Short Detector Circuit
Source voltage 200mV
Max Source Current 1mA
Continuity Threshold ~4 ohms
Short Flag A high, TTL level
Power supply +5VDC ±10%, 500mA min.
Operating temperature 0 to +70°C
Operating humidity 5% to 95% non-condensing
Dimensions 2.0” x 4.0”


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  50K Operations = 2 years at 100 tests/day 2M Operations = 8 years at 1000 tests/day 10M Operations = 10 years at 4000 tests/day

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