CAPKIT Midwest Devices Repair Kit for Capacitor Wizard
The MidWest Devices CapKit Repair Kit is available if you accidentally check a charged or powered up capacitor you may damage the Capacitor Wizard®. This CAPKIT contains all the parts needed to repair damage caused by charged capacitors. MPN: #CW1B-RK
Measure some low value resistors. Verify agreement with the Capacitor Wizard®. If the Capacitor Wizard® closely agrees then it is working properly and in calibration. Measure Capacitor Wizard® input resistance using a standard multimeter with a low ohms capability. Zero out the multimeter probe resistance. Measure the resistance between the Capacitor Wizard® probes. The resistance between the probes should read between 2.3 to 2.5 ohms.
Why must I discharge Capacitors? The input resistance of the Capacitor Wizard® is held very low by two one ohm resistors
(R51 & R52) and the low probe lead resistance of 500 milliohm. This low impedance insures a proper ESR measurement
discarding transients. If you attempt to test a charged cap these resistors will often just discharge the capacitor, no
damage done. However if the unit under test is turned on or if the capacitor has a lot of stored energy you will damage
one or both of these resistors. You may also damage (2) capacitors (C23, [email protected] & C8, [email protected]), (Q5) 2N3904, (Q6)
2N3906, (R53) 100ohm 1/8w, U1 - TLC2274 (or Raytheon RC3403) - Do not substitute a LM324, MC3403 or any other part
for the TLC2274 as they don't have enough gain @100khz to zero the meter.
Purchase a Midwest Devices CAPKIT sold by Howard Electronics Today!
Howard Electronics offer you the customer the best Vendor selection of Soldering and Desoldering tools, SMD Rework, Heat Guns, Microscopes, and Specialty tools you could ask for. Our vendors are Atten, Auburn Technology, Chip Quik, Den-On Instruments, EDSYN, Goot, Hei Scope, JBC Tools, Jensen Global, Jovy, Mag Eyes, Master Appliance, Midwest Devices, MG Chemicals, Pana Vise, Qualitek, Steinel, Scienscope, Virtual Industries, Weller, and Xytronics. Please select the best vendor for the tools that you require.
No posts found