Welcome to the N1IR Electronics Website. Totally off the cuff, one take, unrehearsed video projects for anyone interested in amateur radio, electronic design, makers, hardware hackers and science.

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Training the hand and mind since 1982.

Wednesday, December 20, 2017

HVAC Repair

Here is a repair done by one of my 12th grade students, a Pipe Temperature Gauge. This was brought in non-working condition, we took it apart found some corrosion on the membrane switches on the PCB preventing the unit to turn on, cleaned and works great now. 

Here is the description on the company web site:

The Cooper-Atkins Model 4005i will measure pipe temperatures quickly and easily without a lot of equipment utilizing a claw type pipe clamp probe. Temperature registration is shown on a built-in digital LCD display. This unique instrument also allows measurements of liquids and solids with its retractable general-purpose probe hidden in the handle. Features include auto shut-off after 5 minutes of non-use, hold, max and min. The temperature range of this instrument is -20 ° to 300 °F (-29 ° to 149 °C). The Cooper model 4005i comes standard with a soft carry case including a belt loop so you can easily keep the instrument with you at all times.
It's the perfect tool to measure pipe surface temperatures and/or take measurements of liquids/solids quickly and easily without a lot of equipment with the same instrument. Patented Design. Can be used on pipes with diameters of 1/4" to 1-3/8". It features a cordless pipe clamp with a 2.5" retractable general purpose puncture probe. It includes a Nylon belt pouch.