The DataSwitch Model 550 Continuity Tester is designed to test membrane switches rapidly and accurately foropens, shorts, and high resistance. This membrane switch tester is entirely self-pinning; no programming is needed. The Model 550 tests up to 50 trace lines.
STANDARD FEATURES OF MODEL 550 CONTINUITY TESTER
• LED Testing: Lights switch-mounted LEDs to check for good or bad functions. Polarity can be determined by watching the LED panel.
• High Resistance ('Hi-R') Test: Checks dielectric cross-overs by increasing sensitivity of the tester to 10 Megohms while testing for current leakage between conductors.
• Test Head Connector Box: provides the 3 connectors necessary to interface with different types of tail terminations: solder tabs, receptacles, and connectorless tails. Connector styles may vary. The test head is connected to a header on the front of your membrane switch tester with a ribbon cable.
PURCHASE OF MODEL 550 CONTINUITY TESTER INCLUDES
• For tails of up to 50 trace lines
• One Membrane Switch Tester
• Two 25-Pin Test Heads
• Two-25 Pin Ribbon Cables
• One 12-VDC Power Supply
• One Year Warranty
PRODUCT ACCESSORIES FOR MODEL 550 CONTINUITY TESTER
• Connector Adapter Board: Can be used in place of the test head to save wear on the right angle header, which is used for receptacles.
• Test Clamp Fixture: Can be used for testing connectorless tails. It attaches to your membrane switch tester by using the 25 pin ribbon ribbon cable.
AVAILABLE OPTIONS FOR MODEL 550 CONTINUITY TESTER
• Dual Range Switch: Adds a second test range to allow testing of switches with loop resistance of 0-30,000 Ohms.
• Reverse Polarity Function: Tests LEDs wired in either a common cathode or a common anode configuration.
• Volume and Tone Control: Helps differentiate between tones when more than one membrane switch tester is in use. Earphone Capability increases operator's listening comfort and awareness while silencing room noise. An earphone jack is installed on the back of the membrane switch tester.
| MODEL 550 CONTINUITY TESTER TYPICAL TEST CONDITIONS | |||
| Test Condition | LED Pin Indicator* | Resistance LED | Audible Tone |
| Good Key | LEDs on | Green | On |
| Open Conductors | LEDs Off | Red | Off |
| High Resistance | 2 LEDs On | Red | Off |
| Shorted Conductors | 3 or more LEDs On | Red | Off |
| * Green LED indicates good; Red LED indicates reject | |||
MODEL 550 CONTINUITY TESTER SPECIFICATIONS | |
| Resistance Test Range | 0-1,000 Ohms* |
| Resistance Test Accuracy | Less than 10 Ohms |
| Shorts Test Sensitivity | 250,000 Ohms Minimum** |
| Test Current | 4-5 Milliamps*** |
| Maximum Test Voltage | 12 VDC |
| Test Capability | 50 Traces |
| Power Requirements | 110 VAC 60 Hz 220 VAC 50 HZ upon request |
* May be extended to 30,000 Ohms for dual range option ** May be extended to 10 Megohms for high resistance option and to 20 Megohms on *** Certain options will alter this value; contact factory for details. | |
DataSwitch Continuity Testers deliver the speed and ease of use required for a production-line environment, plus the versatility and accuracy needed for engineering research. 
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Our unique family of membrane switch testers and components allows you to customize your test equipment to perform exactly as you need it to. Each component can be integrated for use with our core products and accessories. 
Our products are quick and simple to set up. Although each product comes with a detailed, easy-to-understand instruction manual, our intuitive equipment works so efficiently that you will need to do little more than plug it in and turn it on.