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MICROPROCESSOR-BASED TESTERS AND BUILD AIDS

Cablescan’s line of microprocessor-based testers/build aids is designed to enable you to select from a wide variety of configurations – number of test points, optional printer, optional PC, program storage by EEPROM or Floppy, etc. They do, however incorporate a number of features that are common to all of them.

FEATURES

FRONT PANEL CONTROLS AND DISPLAY
Each tester employs an alphanumeric display. It displays test conditions, signature codes, error information, and assembly connection points. All modes and functions are controlled by keys; main modes by individual keys, additional modes and functions by menu keys.
PROGRAMMING BY SELF LEARN
Just connect a known-good harness to the tester interface port and press LEARN. Within seconds, the complete set of continuities is stored in memory. Each continuity has a FROM point and a TO point, with each point expressed as a tester interface location.
SIGNATURE CODE
During LEARN, the tester calculates a Signature Code that is unique to that harness/Cable configuration. Before testing a new batch of harnesses/cables with that configuration, the operator simply connects one assembly (from the batch) to the tester and presses LEARN. The newly calculated signature can then be compared to the original signature recorded for that assembly.
USER LABELS
Alphanumeric User Labels can be assigned to actual harness continuity points as cross-references to their corresponding tester interface points. When User Labels are assigned, all displays and printouts will show them in lieu of tester point numbers.
PROGRAM STORAGE
Memory accommodations include an internal memory (battery-backed RAM) and either a plug-in cartridge (Models 64 and 256/PC) or a floppy diskette (Model 512). The RAM has a working memory and storage space for 16 programs (4 with User Labels). The 3 -inch floppy diskette may store up to 112 programs. Additional storage is available by PC if that option is utilized.
TEST 
TEST mode performs a scan of the assembly circuits to detect Opens or Shorts. (A missing continuity is an Open, and an unwanted continuity is a Short.) If no error is detected, PASSED is displayed. If an Open or Short is detected, the scan stops and the FROM and TO points for that circuit are displayed, along with an O for Open or an S for Short. Pressing TEST will resume scanning.
LOOP TEST
When LOOP is selected, the same test scan is recycled over and over. As successive scans are run, the circuits may be flexed and vibrated to reveal intermittent faults.
ASSEMBLY AID
The tester has two assembly modes. SEQUENTIAL BUILD displays, in a pre-programmed sequence, the FROM and TO points to be assembled. Through body conductance, touch by fingers or by probe locates displayed points, and a tone indicates when a correct termination is made. The tester advances through the sequence of circuit points as programmed. RANDOM BUILD uses body conductance to select and identify wires randomly to complete an assembly. When a wire end is touched, the termination point for that wire is displayed. A tone indicates when the termination is correct.
PC INTERFACE
Optional PC software programs, TestRite, is available to control the testers through their serial ports. TestRite is a Windows 2K/XP/Vista/7 application program.

TestRite is a tool for creating, editing, and testing wire list programs. Without a tester connected, wire lists (continuities) and cross-reference lists (test point labels) can be created by keyboard. With a tester connected, a program can be learned from a harness by first selecting a LEARN command from the TestRite tool bar. The wire list can then be saved to disk, or cross-references can be assigned to test points prior to saving. To simplify operation, all tester-related commands are automatically sent in response to the editing process. This interactive operation during wire list editing greatly reduces and simplifies the programming process. The TestRite (Editor) also provides testing and displays error lists without leaving the editing process.

PRINTER INTERFACE
Hardcopies of test results can be obtained when an optional 80-column serial printer is connected to the PRINTER interface, and ERROR LIST is selected. When WIRE LIST is selected, the complete continuity program in working memory will be printed.
 

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Last modified: May 28, 2008