videobruce

Specifically these items that I'm looking to purchase. I have a few questions about those and any other models, this is not my 1st rodeo with these; https://www.tequipment.net/Triplett/RHT32/Psychrometer/ https://www.tequipment.net/Extech/RH300-CAL/Lab-Accessories/ I have had issues with a Martel C315 Humidity Meter (I believe the company is out of business now) which is the same as the current Amprobe TH-3 that is over 10 years old now.; https://www.testequipmentdepot.com/amprobe-th-3-relative-humidity-temperature-meter-dual-display-extended-probe-and-capacitive-sensor.html I haven't used it much lately due to the following; What happens the unit looses it's calibration using their 'salt bottles' in a matter of months. So anytime I need to use it, it has to be re-calibrated. 1. How long are these models (not just this one I'm looking at) hold calibration? 2. How long are those 'salt bottles' good for (assuming they are kept closed and in a temperature proper environment. Same goes for the tool itself)? 3. How does one know these calibration bottles are still good? 4. Does one have to add more filtered water to those bottles after a period of time? I have read, two years was mentioned for the lifespan of those 'Salt Bottles' which seems kinda short (of course depending just how often you calibrated the meter.

I'm looking at a Ryobi cordless mower (RY40180) that has been out 2-3 years and find many reports with the mower stopping by itself due to the safety interlocks in the handle. I know others use this setup where the handle length has to be fully extended and the elevated position has to be set and locked before the motor will spin. The problem appears to be thru vibration, sections loosening up and/or bad microswitches causing it to 'trip' and the motor stops. Can anyone here confirm how much a problem this is and has it been addressed by Ryobi?

I would say it would be due to the battery pack and their lawyers getting together to protect against lawsuits. Take away the Li-Ion pack and one would be hard pressed to find anything really hazardous. Actually I believe I have seen that with other mower manufactures.

Long story short; The chuck is turning the opposite direction of the intended direction. Forward is reverse and vice a versa. And yes, I did try swapping the motor leads which is where it got even worse. Doing so solved the problem, but only for a day. The very next day, the direction is opposite again. IOW's, it reverted back to opposite if the intended direction. There are two transistors mounted on a heat sink in the base of the tool. There is also a large rectangular component with two leads, I can only assume it a capacitor, thou it's a very odd shape. . I have another identical older model and that is ok. This is less than a year old, but was refurbished, so the warranty is expired. . This whole thing started when the battery pack was discharged (apparently) enough, the motor did not turn, but the LED work light did light which I took as a problem with the tool. Past practice, the motor will turn, barely if the charge was low, but any other drill I have used (NiCad or NiMh) it would at least make a noise. Assuming, due to this newer lithium ion battery pack tech, things changed and these motors now have a 'cliff effect'. It's either runs or it does not. . Ok, any electronic experts out there can explain this one? (I have not found any gremlins yet. )