Description: Description The Model 126C-D is an integral, rack mounting,automatic, 4-wire resistance limit bridge primarily intended for controlling the mechanical operation by which film resistors and hybrid microcircuitry resistive elements are increased to final value.Upon receipt of an external start test signal, the bridge automatically compares the resistor under test on a high/low basis to a "Minimum Start" value. If this test result is acceptable, the trimming operation is commanded and the increasing resistance of the element being processed is monitored continuously. When the resistance reaches the "Stop" value, the trim command is removed and after an adjustable time delay, the ."Final" value with programmed tolerance limits is automatically checked on a go/high/low basis. If the initial resistance value is higher than the "Stop" value the trim command is never issued and the final test is performed directly.Test results and command signals are provided in terms of mercury wetted relay contact closures and are visually indicated by panel lamps. Operation of the Model 126C-D is initiated with a non-critical contact closure and its outputs are Automatic resistance test bridge for trim or sorting Functions: 1. Performs initial "mnimum Start Value" test to verify that resistor is within adjustable range. 2. Commands mechanical trim operation and automatically stops trimming when resistance reaches "Stop" value. 3. Automatically performs final high low test in terms of "Final" value and allowable tolerance limit provided Specifications Programming Final Value: 5 .Digits and 4 Multipliers Multiplier Range Resolution XI 0-10K 0.1 ohm X10 0-100K 1.0 ohm X100 O.IM 10 ohms XIK 0-10M 100 ohms Final Value Tolerance Limits: No. of Digits: 2 For Plus and 2 For Minus Range: 0 to +/- .1 -11% Resolution: 0.1 % Stop Value: Programmed as negative percentage of the Final Value No. of Digits: 3 Range: 0 to 11.1% Resolution: 0.01 % Minimum Start Value: Programmed as a negative percentage of the Final Value No. of Digits: 2 Range: 0 to 600;0 Resolution: 10;0 Panel Controls: Start Test: Push button initiates automatic cycle. Trim: Push button over-rides all automatic gating to command trim operation. Button release initiates final test. Trim lamp goes out when accept condition is reached. Stop: Push button stops automatic trim cycle. Delay: Front panel screwdriver adjustment sets time delay from ..Stop" to ..Final" test. Adjustable over range of 30 to 100 ms Read: Push button enables manual reading of Final value. Power: Toggle switch controls 115 V, ac Remote Start Test: External contact closure for 3 mS minimum. Rx Wiring: 4 Wire Kelvin. Display: Initial Low: Orange lamp indicates resistor under test to be below "Miinimum Start" value. Trim: Blue lamp indicates active trimming. Final Accept: Green lamp indicates successful completion of trim. Final High: Red lamp indicates resistor under test to be higher than positive tolerance limit of 'Final value". Final Low: Yellow lamp indicates resistance under test to be be under negative tolerance limit of "Final value". System Measureml'lit Accuracy: :+/-:0.05% from 10 ohm to 10Meg Stop Time: 10 mS maximum Final Test Time: 10 mS Excitation: Voltage excitation automatically adjusts to limit power dissipation in resistance under test to 25 mw and also guarantee specified system accuracy. Physical Panel Chassis rack mount 16" Weight: 50 Ibs. Color and Finish Boonton Eleclronics .tone green; semi gloss 4 wire Kelvin RX input but no cable supplied - can supply schematic for wiring. Service manual available as separate item if desired.
Price: 400 USD
Location: Pittsboro, North Carolina
End Time: 2025-01-27T17:51:39.000Z
Shipping Cost: 30 USD
Product Images
Item Specifics
Restocking Fee: No
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Brand: Boonton Electronics
Type: Resistor Thick Film Testing/Sorting Trimming
Country/Region of Manufacture: United States
