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#1
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Kill a Watt(tm) power meters
Anybody familiar with them? Is the "EZ" (model P4460) worth an
extra $15 over model P4400? I want to see how much electricity my freezers, TV sets, computers, etc are *really* using, plus check the frequency stability of my portable generator and that little inverter than I mounted in my truck. Thanks, Bob |
#2
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Kill a Watt(tm) power meters
"zxcvbob" wrote in message ... Anybody familiar with them? Is the "EZ" (model P4460) worth an extra $15 over model P4400? I want to see how much electricity my freezers, TV sets, computers, etc are *really* using, plus check the frequency stability of my portable generator and that little inverter than I mounted in my truck. Thanks, Bob You may want to get on the Lee Valley mailing list. They had that model as a special last week (now sold out) for $20. www.leevalley.com |
#3
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Kill a Watt(tm) power meters
zxcvbob wrote:
Anybody familiar with them? Is the "EZ" (model P4460) worth an extra $15 over model P4400? I want to see how much electricity my freezers, TV sets, computers, etc are *really* using, plus check the frequency stability of my portable generator and that little inverter than I mounted in my truck. The "EZ" has two enhanced features over the basic model: 1. You can enter your KWH rate and it will tell you how much - in dollars and cents - the reading cost, and 2. Has a battery backup so it doesn't reset when the power goes off. If you don't know how to multiply, or do not have access to a calculator, #1 may be necessary. If you want to accumulate readings over a power outage situation, #2 might be a help. Neither "enhancement" seems useful for the needs you have. |
#4
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Kill a Watt(tm) power meters
zxcvbob wrote:
Anybody familiar with them? Yes! They are the cat's whiskers. Is the "EZ" (model P4460) worth an extra $15 over model P4400? If you need sizzle with your steak, I suppose so. It appears that the EZ has a built in calculator so you can plug in your electric cost & 'predict' annual costs. Amazon has the basic P4400 for $20.62 [buy something else for $5 & the shipping is free]. The 4600 is $34. I wouldn't spend the extra, myself. I like the KISS principle-- If I need to calculate cost or future usage I'll do the math in my head or on a $2 calculator. . . or maybe even dig out a pencil. Jim |
#5
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Kill a Watt(tm) power meters
On Sat, 24 Oct 2009 23:16:31 -0500, zxcvbob wrote: Anybody familiar with them? Is the "EZ" (model P4460) worth an extra $15 over model P4400? I want to see how much electricity my freezers, TV sets, computers, etc are *really* using, plus check the frequency stability of my portable generator and that little inverter than I mounted in my truck. Thanks, Bob It may not work on a freezer. It has built in over current protection that kills power to the device and a freezer may be too much to handle. I know I cant get a reading off my fridge because the compressor start up current is over this limit. |
#6
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Kill a Watt(tm) power meters
On Oct 25, 9:36*am, homer wrote:
On Sat, 24 Oct 2009 23:16:31 -0500, zxcvbob wrote: Anybody familiar with them? *Is the "EZ" (model P4460) worth an extra $15 over model P4400? I want to see how much electricity my freezers, TV sets, computers, etc are *really* using, plus check the frequency stability of my portable generator and that little inverter than I mounted in my truck. Thanks, Bob It may not work on a freezer. *It has built in over current protection that kills power to the device and a freezer may be too much to handle. *I know I cant get a reading off my fridge because the compressor start up current is over this limit. I'd definitely get the EZ model. It's worth the small addional cost. You can enter the cost of electricity per KWh and it then will directly display how much it costs to run the load per day, week, month or year. You can just leave it up on the display and watch it update, glance at it during the day, etc. Much better than just seeing XX Kwh and having to manually do the translation. Good news is Costco has them for $27. Bad news is that about 6 months ago I bought one and it was bad. One push button did not work at all. Took it back and got another one. That one, a different button didn't work at all. So, I waited hoping the crap ones would clear out. Bought one last week and it's working perfectly, at least so far..... I've put one on two refrigerators, a 24 year old one and a new one. It worked on both. |
#7
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Kill a Watt(tm) power meters
Jim Elbrecht wrote:
zxcvbob wrote: Anybody familiar with them? Yes! They are the cat's whiskers. Is the "EZ" (model P4460) worth an extra $15 over model P4400? If you need sizzle with your steak, I suppose so. It appears that the EZ has a built in calculator so you can plug in your electric cost & 'predict' annual costs. Amazon has the basic P4400 for $20.62 [buy something else for $5 & the shipping is free]. The 4600 is $34. I wouldn't spend the extra, myself. I like the KISS principle-- If I need to calculate cost or future usage I'll do the math in my head or on a $2 calculator. . . or maybe even dig out a pencil. Jim Frys periodically has the P4400 on sale for $14.99. If you use 120vac devices, you should have at least one. I use them to size battery requirements for UPS. |
#8
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Kill a Watt(tm) power meters
On Oct 25, 11:11*am, wrote:
On Sun, 25 Oct 2009 07:30:37 -0700 (PDT), wrote: On Oct 25, 9:36*am, homer wrote: On Sat, 24 Oct 2009 23:16:31 -0500, zxcvbob wrote: Anybody familiar with them? *Is the "EZ" (model P4460) worth an extra $15 over model P4400? I want to see how much electricity my freezers, TV sets, computers, etc are *really* using, plus check the frequency stability of my portable generator and that little inverter than I mounted in my truck. Thanks, Bob It may not work on a freezer. *It has built in over current protection that kills power to the device and a freezer may be too much to handle. *I know I cant get a reading off my fridge because the compressor start up current is over this limit. I'd definitely get the EZ model. *It's worth the small addional cost. You can enter the cost of electricity per KWh and it then will directly display how much it costs to run the load per day, week, month or year. * *You can just leave it up on the display and watch it update, glance at it during the day, etc. * Much better than just seeing XX Kwh and having to manually do the translation. Good news is Costco has them for $27. Bad news is that about 6 months ago I bought one and it was bad. * One push button did not work at all. * Took it back and got another one. That one, a different button didn't work at all. * *So, I waited hoping the crap ones would clear out. * Bought one last week and it's working perfectly, at least so far..... I've put one on two refrigerators, a 24 year old one and a new one. It worked on both. The first eye opener for most people is just how little power a fridge actually uses. It is certainly not the power hog most people think it is. (a new one). My side by side, ice in the door Whirlpool used 120KWH in 61.2 days (August September) and it was outside in the Florida summer heat in the pool bar. If it was in the house I would expect a lower number but the difference might show up in the A/C bill.. Depends on the age of the fridge. I bought my kill-a-watt to build a case for buying a new one. Our refrigerator dated to the 1960s and after monitoring for a few weeks with the kill a watt meter, looked like annual usage would be around 2400 KWH, about four times what the new ones use. So the meter was a good investment of $20, we save almost that much every month on electricity with the new fridge. -- H |
#9
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Kill a Watt(tm) power meters
On Oct 25, 6:47*am, "HeyBub" wrote:
zxcvbob wrote: Anybody familiar with them? *Is the "EZ" (model P4460) worth an extra $15 over model P4400? I want to see how much electricity my freezers, TV sets, computers, etc are *really* using, plus check the frequency stability of my portable generator and that little inverter than I mounted in my truck. The "EZ" has two enhanced features over the basic model: 1. You can enter your KWH rate and it will tell you how much - in dollars and cents - the reading cost, and 2. Has a battery backup so it doesn't reset when the power goes off. If you don't know how to multiply, or do not have access to a calculator, #1 may be necessary. If you want to accumulate readings over a power outage situation, #2 might be a help. Neither "enhancement" seems useful for the needs you have. I guess I'm missing something here. They give you some data, but other than curiosity, what usefullness does that data serve. Plug a refrig into one and learn it uses x kw and costs x $ per month. But there ain't a darn thing you can do about it except buy a new frig. Ditto for all the other appliances you have in your home. Yeah, I can see figuring what loads you can put on a generator, but other than that, what 'useful' data do they provide? KC |
#10
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Kill a Watt(tm) power meters
On Oct 24, 10:16 pm, zxcvbob wrote:
Anybody familiar with them? Is the "EZ" (model P4460) worth an extra $15 over model P4400? I want to see how much electricity my freezers, TV sets, computers, etc are *really* using, plus check the frequency stability of my portable generator and that little inverter than I mounted in my truck. Thanks, Bob Andy comments: I'd like to suggest an alternative. You can get a "clip on" multimeter from harborfreight.com (free catalog) for about $10.00 and measure the current consumed by the device by simply clipping around one of the wires (usually the black one) going to the device, and it will work for any device that works on 60 cycle AC. The current, times 120, is the kva in watts. A simple calc yields the cost per hour to run it. For frequency of your generator, just plug in one of those $5 electric clocks and compare the time to that of your watch. The longer the run time, the better. If the frequency is lower, the time on the electric clock will be less than the time on your watch, by the same proportion. Neither of these alternatives are as easy as what you have proposed, but use instruments that can be used for other things. Just a suggestion. Andy in Eureka, Texas |
#11
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Kill a Watt(tm) power meters
Andy wrote:
-snip- I'd like to suggest an alternative. You can get a "clip on" multimeter from harborfreight.com (free catalog) for about $10.00 and measure the current consumed by the device by simply clipping around one of the wires (usually the black one) going to the device, and it will work for any device that works on 60 cycle AC. The current, times 120, is the kva in watts. A simple calc yields the cost per hour to run it. Not exactly the same as a Kil-o-watt meter.. That gives the cost *for that hour*. There are a lot of variables over the course of a 24hr day. Defrost cycles, number of refrigeration cycles, etc. For frequency of your generator, just plug in one of those $5 electric clocks and compare the time to that of your watch. The longer the run time, the better. If the frequency is lower, the time on the electric clock will be less than the time on your watch, by the same proportion. Neither of these alternatives are as easy as what you have proposed, but use instruments that can be used for other things. I can't imagine a household that won't get $25 worth of use from a Kill-o-watt meter in a few years. It is one of those things that once you have it, you find more and more occasions to plug it in. Jim |
#12
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Kill a Watt(tm) power meters
On Wed, 28 Oct 2009 08:01:34 -0400, Jim Elbrecht
wrote: There are a lot of variables over the course of a 24hr day. Defrost cycles, number of refrigeration cycles, etc. BTW, this Sunday has 25 hours (at least in the US where the mess of Damn Stupid Time intrudes on reality). -- 58 days until the winter solstice celebration Mark Lloyd http://notstupid.us "How could you ask me to believe in God when there's absolutely no evidence that I can see?" -- Jodie Foster |
#13
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Kill a Watt(tm) power meters
You can get a "clip on" multimeter from harborfreight.com *(free catalog) for about $10.00 and measure the current consumed by the device by simply clipping around one of the wires (usually the black one) going to the device, and it will work for any device that works on 60 cycle AC. *The current, times 120, is the kva in watts. In an AC circuit, Volt x Amps are not exactly the same thing as Watts due to power factor. For loads like incandesenct light bulbs and resistance heaters, the power facotr is very close to one so there is little error but for reactive loads like motors, there can be a significant difference. Mark |
#14
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Kill a Watt(tm) power meters
If you pack 8 hours of electricity into a five minute
warmup, that's multiply by a factor of 96. Suppose my computer draws 2 amps. Well, multiply that by 96 times, and we're trying to draw 194 ampere rate, for five minutes. Is that likely? My computer warmup is less than five minutes, so we'd have to draw about a thousand amperes, for a full minute. -- Christopher A. Young Learn more about Jesus www.lds.org .. wrote in message ... On Wed, 28 Oct 2009 08:06:49 -0700, Smitty Two It got started by an IBM study on MTBF on hard drives that found a power off/on cycle was worth about 8 hours of running time. Prior to that it was studies on light bulbs and fluorescent finding similar results |
#15
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Kill a Watt(tm) power meters
Andy wrote:
On Oct 24, 10:16 pm, zxcvbob wrote: Anybody familiar with them? Is the "EZ" (model P4460) worth an extra $15 over model P4400? I want to see how much electricity my freezers, TV sets, computers, etc are *really* using, plus check the frequency stability of my portable generator and that little inverter than I mounted in my truck. Thanks, Bob Andy comments: I'd like to suggest an alternative. You can get a "clip on" multimeter from harborfreight.com (free catalog) for about $10.00 and measure the current consumed by the device by simply clipping around one of the wires (usually the black one) going to the device, and it will work for any device that works on 60 cycle AC. The current, times 120, is the kva in watts. You will get the VA, not the watts. They are not the same except for a pure resistance load like a light bulb. They are not the same because of "power factor". If you want the cost of using anything with a motor you need to know the watts. |
#16
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Kill a Watt(tm) power meters
"Andy" wrote in message I'd like to suggest an alternative. You can get a "clip on" multimeter from harborfreight.com (free catalog) for about $10.00 and measure the current consumed by the device by simply clipping around one of the wires (usually the black one) going to the device, and it will work for any device that works on 60 cycle AC. The current, times 120, is the kva in watts. A simple calc yields the cost per hour to run it. The advantage of a Kill a Watt meter is that it records over time. It takes fluctuating load into consideration, especially important on refrigerators and freezers that have a varying load over time, from nothing to full power with compressor and defrost equipment in use. A spot check will not give the complete story. Also, no splitting of the cord is required. Your system works well with simple load that are constant when on. |
#17
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Kill a Watt(tm) power meters
Mark Lloyd wrote:
On Wed, 28 Oct 2009 08:01:34 -0400, Jim Elbrecht wrote: There are a lot of variables over the course of a 24hr day. Defrost cycles, number of refrigeration cycles, etc. BTW, this Sunday has 25 hours (at least in the US where the mess of Damn Stupid Time intrudes on reality). I wouldn't mind if we stayed on DST all year. The worst part of it is in the fall when we go back to standard time. My internal clock doesn't like waking up earlier. |
#18
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Kill a Watt(tm) power meters
On Oct 29, 9:46*am, Tony wrote:
Mark Lloyd wrote: On Wed, 28 Oct 2009 08:01:34 -0400, Jim Elbrecht wrote: There are a lot of variables over the course of a 24hr day. *Defrost cycles, number of refrigeration cycles, etc. BTW, this Sunday has 25 hours (at least in the US where the mess of Damn Stupid Time intrudes on reality). I wouldn't mind if we stayed on DST all year. *The worst part of it is in the fall when we go back to standard time. *My internal clock doesn't like waking up earlier. um, that's the spring. and I hate it too... nate |
#19
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Kill a Watt(tm) power meters
N8N wrote:
On Oct 29, 9:46 am, Tony wrote: Mark Lloyd wrote: On Wed, 28 Oct 2009 08:01:34 -0400, Jim Elbrecht wrote: There are a lot of variables over the course of a 24hr day. Defrost cycles, number of refrigeration cycles, etc. BTW, this Sunday has 25 hours (at least in the US where the mess of Damn Stupid Time intrudes on reality). I wouldn't mind if we stayed on DST all year. The worst part of it is in the fall when we go back to standard time. My internal clock doesn't like waking up earlier. um, that's the spring. and I hate it too... nate I knew I was gonna screw that up. What I hate is it getting dark earlier. Leave it dark longer in the AM because I'll sleep through it anyway. |
#20
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Kill a Watt(tm) power meters
N8N wrote:
On Oct 29, 9:46 am, Tony wrote: Mark Lloyd wrote: On Wed, 28 Oct 2009 08:01:34 -0400, Jim Elbrecht wrote: There are a lot of variables over the course of a 24hr day. Defrost cycles, number of refrigeration cycles, etc. BTW, this Sunday has 25 hours (at least in the US where the mess of Damn Stupid Time intrudes on reality). I wouldn't mind if we stayed on DST all year. The worst part of it is in the fall when we go back to standard time. My internal clock doesn't like waking up earlier. um, that's the spring. and I hate it too... nate I knew I was gonna screw that up. What I hate is it getting dark earlier. Leave it dark longer in the AM because I'll sleep through it anyway. |
#21
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Kill a Watt(tm) power meters
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#22
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Kill a Watt(tm) power meters
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#24
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Kill a Watt(tm) power meters
In article ,
(Don Klipstein) wrote: In article , wrote: On Wed, 28 Oct 2009 08:06:49 -0700, Smitty Two wrote: As far as the computer, those shouldn't be left on 24/7 anyway, for the health and longevity of the machine. I confess to being baffled by how that myth got created and so widely adopted. It got started by an IBM study on MTBF on hard drives that found a power off/on cycle was worth about 8 hours of running time. Prior to that it was studies on light bulbs and fluorescent finding similar results At one time, starting a fluorescent took something like an hour or two off its life. Now it's more like 5-10 minutes, though probably longer if it's used with an old fashioned "glow switch" starter that blinks it afew times before getting it started. As for incandescents - I'd like a cite for any of those studies saying what you say. Although incandescents often burn out during cold starts, cold starts do surprisingly little damage to most incandescents. What happens is that an aging filament becomes unable to survive a cold start a little before it becomes unable to survive continuous operation. The condition that makes an aging filament unable to survive a cold start is a hot thin spot in the filament - which worsens during operation at a rate that accelerates worse than exponentially. - Don Klipstein ) And I'd like to know when the hard drive study was done, and whether the current generation of drives has been subjected to any similar study. I personally doubt the validity of the original study. Anyway, there's a lot more going on inside a computer than a hard drive, and leaving it on all the time is unquestionably detrimental to the electronics. |
#25
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Kill a Watt(tm) power meters
On Thu, 29 Oct 2009 09:46:29 -0400, Tony
wrote: Mark Lloyd wrote: On Wed, 28 Oct 2009 08:01:34 -0400, Jim Elbrecht wrote: There are a lot of variables over the course of a 24hr day. Defrost cycles, number of refrigeration cycles, etc. BTW, this Sunday has 25 hours (at least in the US where the mess of Damn Stupid Time intrudes on reality). I wouldn't mind if we stayed on DST all year. That would be fine. The problems are when you keep CHANGING it. Maybe you realize that DST all the time is the same as no DST at all. Clocks are an hour different, but we'd adapt to that. There'd just be no changes to keep messing things up. The worst part of it is in the fall when we go back to standard time. My internal clock doesn't like waking up earlier. I think that's common. The natural thing is waking up later. I'm working on a web page that calculates countdowns. DST has really made that a lot more complicated (as one little example, most locations change the offset from UTC by 1 hour for DST. However, there is one exception: Lord Howe Island, where it's .5 hour). -- 56 days until the winter solstice celebration Mark Lloyd http://notstupid.us "How could you ask me to believe in God when there's absolutely no evidence that I can see?" -- Jodie Foster |
#26
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Kill a Watt(tm) power meters
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#27
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Kill a Watt(tm) power meters
"Mark Lloyd" wrote in message That would be fine. The problems are when you keep CHANGING it. Maybe you realize that DST all the time is the same as no DST at all. Clocks are an hour different, but we'd adapt to that. There'd just be no changes to keep messing things up. Close, but not exactly. DST gives me (in winter) a dark morning and light driving home in the evening. Standard time gives me more light in the morning and I drive home in the dark. My preference is to function on the same time as DST. If I was on the opposite side of my time zone, I'd be rather close to what DST is here. My preference is to have the winter dark in the AM. I did that by changing my hours at work but the rest of the world does not seem to want to comply to my personal choices for everything. People often state a preference, but that may not be the same as we see it in different parts of the same time zone or the northern versus southern latitudes. At work I have the luxury of coming and going as I please, but most do not. |
#28
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Kill a Watt(tm) power meters
"Mark Lloyd" wrote in message That would be fine. The problems are when you keep CHANGING it. Maybe you realize that DST all the time is the same as no DST at all. Clocks are an hour different, but we'd adapt to that. There'd just be no changes to keep messing things up. Close, but not exactly. DST gives me (in winter) a dark morning and light driving home in the evening. Standard time gives me more light in the morning and I drive home in the dark. My preference is to function on the same time as DST. If I was on the opposite side of my time zone, I'd be rather close to what DST is here. My preference is to have the winter dark in the AM. I did that by changing my hours at work but the rest of the world does not seem to want to comply to my personal choices for everything. People often state a preference, but that may not be the same as we see it in different parts of the same time zone or the northern versus southern latitudes. At work I have the luxury of coming and going as I please, but most do not. |
#29
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Kill a Watt(tm) power meters
On Fri, 30 Oct 2009 17:04:19 -0400, "Ed Pawlowski"
wrote: "Mark Lloyd" wrote in message That would be fine. The problems are when you keep CHANGING it. Maybe you realize that DST all the time is the same as no DST at all. Clocks are an hour different, but we'd adapt to that. There'd just be no changes to keep messing things up. Close, but not exactly. DST gives me (in winter) a dark morning and light driving home in the evening. Getting up earlier and leaving work earlier is what does that. Standard time gives me more light in the morning and I drive home in the dark. Getting up later and leaving work later does that. My preference is to function on the same time as DST. Meaning you'd like to do things later in the day. Apparently, a lot of people feel like that. If I was on the opposite side of my time zone, I'd be rather close to what DST is here. My preference is to have the winter dark in the AM. I did that by changing my hours at work but the rest of the world does not seem to want to comply to my personal choices for everything. People often state a preference, but that may not be the same as we see it in different parts of the same time zone or the northern versus southern latitudes. At work I have the luxury of coming and going as I please, but most do not. That's good. Do it as you please. That's a lot better that supporting this mind game that claims to alter time, but does not (and can not) do such a thing. -- 56 days until the winter solstice celebration Mark Lloyd http://notstupid.us "How could you ask me to believe in God when there's absolutely no evidence that I can see?" -- Jodie Foster |
#30
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Kill a Watt(tm) power meters
On Fri, 30 Oct 2009 17:04:19 -0400, "Ed Pawlowski"
wrote: "Mark Lloyd" wrote in message That would be fine. The problems are when you keep CHANGING it. Maybe you realize that DST all the time is the same as no DST at all. Clocks are an hour different, but we'd adapt to that. There'd just be no changes to keep messing things up. Close, but not exactly. DST gives me (in winter) a dark morning and light driving home in the evening. Getting up earlier and leaving work earlier is what does that. Standard time gives me more light in the morning and I drive home in the dark. Getting up later and leaving work later does that. My preference is to function on the same time as DST. Meaning you'd like to do things later in the day. Apparently, a lot of people feel like that. If I was on the opposite side of my time zone, I'd be rather close to what DST is here. My preference is to have the winter dark in the AM. I did that by changing my hours at work but the rest of the world does not seem to want to comply to my personal choices for everything. People often state a preference, but that may not be the same as we see it in different parts of the same time zone or the northern versus southern latitudes. At work I have the luxury of coming and going as I please, but most do not. That's good. Do it as you please. That's a lot better that supporting this mind game that claims to alter time, but does not (and can not) do such a thing. -- 56 days until the winter solstice celebration Mark Lloyd http://notstupid.us "How could you ask me to believe in God when there's absolutely no evidence that I can see?" -- Jodie Foster |
#31
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#32
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#33
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Kill a Watt(tm) power meters
Mark Lloyd wrote:
That's good. Do it as you please. That's a lot better that supporting this mind game that claims to alter time, but does not (and can not) do such a thing. There is a theory (and I'm not making this up) that the Large Hadron Collider (LHC), in searching for the Higgs boson (the so-called 'God Particle'), doesn't work and can't be made to work because reasonable scientists from the future keep coming back in time and ****ing with it. |
#34
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Kill a Watt(tm) power meters
On Sat, 31 Oct 2009 08:11:46 -0500, "HeyBub"
wrote: Mark Lloyd wrote: That's good. Do it as you please. That's a lot better that supporting this mind game that claims to alter time, but does not (and can not) do such a thing. There is a theory (and I'm not making this up) that the Large Hadron Collider (LHC), in searching for the Higgs boson (the so-called 'God Particle'), doesn't work and can't be made to work because reasonable scientists from the future keep coming back in time and ****ing with it. Maybe that's how we got Daylight Saving Time (that's what it's good for, ****ing with people) :-) -- 55 days until the winter solstice celebration Mark Lloyd http://notstupid.us "How could you ask me to believe in God when there's absolutely no evidence that I can see?" -- Jodie Foster |
#35
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Kill a Watt(tm) power meters
dpb wrote:
Tony wrote: ... ... As far as electronics, about the worst thing you can do is turn it off and on again while it's hot. ... Where did you get this gem from? Electronics training and real life experience. It's quite simple actually, most people know that most electronic failures occur during the power up surge. That power up surge is even more detrimental when the components are hot. |
#36
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Kill a Watt(tm) power meters
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#37
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Kill a Watt(tm) power meters
On Nov 1, 10:50*am, Tony wrote:
wrote: On Sat, 31 Oct 2009 20:03:45 -0400, Tony wrote: Then the most common failure is the bearings, not anything electronic Why do you believe that? Because every failed HD I opened showed signs of abrasion where the head touched the drive disk. *Just my personal experience, granted it is limited. *I should have said most common problems *that I have seen* are mechanical and not electronic. *Then again none of them were mine and may have been subjected to physical shock, IE the "Fonzie Fix". when the drive is turned off normally, the heads are "parked" on a "landing zone" so wear there should not impact any data... also most computer drives are set up like a screen saver, if the drive is not used for 15 minutes (or whatever time the timer is set for) it parks and spins down automatically.. Mark |
#38
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Kill a Watt(tm) power meters
Mark wrote:
On Nov 1, 10:50 am, Tony wrote: wrote: On Sat, 31 Oct 2009 20:03:45 -0400, Tony wrote: Then the most common failure is the bearings, not anything electronic Why do you believe that? Because every failed HD I opened showed signs of abrasion where the head touched the drive disk. Just my personal experience, granted it is limited. I should have said most common problems *that I have seen* are mechanical and not electronic. Then again none of them were mine and may have been subjected to physical shock, IE the "Fonzie Fix". when the drive is turned off normally, the heads are "parked" on a "landing zone" so wear there should not impact any data... I didn't say the drive was parked. I've seen some idiots pound on their pc when it would freeze up. If they didn't hurt anything, a few times I found it just needed all the dust cleaned out, it was overheating. also most computer drives are set up like a screen saver, if the drive is not used for 15 minutes (or whatever time the timer is set for) it parks and spins down automatically.. I've yet to see that as the default setting in any Windows I have used. Most people don't know that setting exists. I've always had to manually change mine to that setting. One exception is if it's a laptop then that would be the normal setting... to save battery life. |
#39
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Kill a Watt(tm) power meters
On Sat, 24 Oct 2009 23:16:31 -0500, zxcvbob wrote:
:Anybody familiar with them? Is the "EZ" (model P4460) worth an :extra $15 over model P4400? : :I want to see how much electricity my freezers, TV sets, computers, :etc are *really* using, plus check the frequency stability of my ortable generator and that little inverter than I mounted in my truck. : :Thanks, :Bob Two things: I. I bought the P4400 in February of 2008. I left it plugged into a power strip and plugged my desktop computer's power strip (and etc.) plugged into the Kill-a-Watt meter, measuring power draw (watts), for an indefinite time. It stopped working. It came back to life, don't remember the details, but leaving it off and unplugged for a while, it started working somehow. Someone said they thought that the meters aren't designed to be used in this way, so I stopped doing it. II. I've found that the P4400 (don't know about the other(s)) doesn't measure low power draw at all accurately. IOW, if your device is drawing 3-4 watts, say, the P4400 doesn't give you anything like an accurate reading. I only know this because I have a far more accurate way of measuring power draw, which I have used for years. The P4400 is a lot easier to use, but my system is much more accurate and I feel I can depend on it more. It's a simple thing I put together for next to nothing: 1. I already had a decent digital multimeter that measures AC amps, easily converted into watts (amps x 120 volts = watts). It cost me around $100 in the early 1990's. 2. I bought a couple of banana plugs that will fit in the multimeter's input jacks and attached them to a length of AC two conductor cord, around 6 feet long. The other end of this ~6 foot length of cord is soldered (both leads) to either end of a cut wire in a short extension cord. IOW, I cut one wire in the middle of that extension cord and connected the cut ends to the cord, the other end of which has the banana plugs. Plugging the banana plugs into the multimeter first (ALWAYS do it this way or you will likely cause a dangerous short !), I THEN plug the extension cord into a power outlet and then a device into the female end of the extension cord. The multimeter gives me the current draw and simple arithmetic gives me the watts. Amps x 120 = watts. Using this system I determined that the P4400 is useless for low draw measurement. I don't remember the cutoff where the P4400 starts being useful. I assume that this holds true for all of them and that I don't have a lemon here. Dan Email: dmusicant at pacbell dot net |
#40
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Kill a Watt(tm) power meters
On Tue, 27 Oct 2009 20:19:23 -0700 (PDT), KC wrote:
:I guess I'm missing something here. They give you some data, but ther than curiosity, what usefullness does that data serve. Plug a :refrig into one and learn it uses x kw and costs x $ per month. But :there ain't a darn thing you can do about it except buy a new frig. itto for all the other appliances you have in your home. Yeah, I can :see figuring what loads you can put on a generator, but other than :that, what 'useful' data do they provide? : :KC Depends how deep your pockets are. Some people don't give a damn about 20 watts. Others do. 20 watts costs me about $20/year when drawn 24/7/365. Personally, I want to know. Dan Email: dmusicant at pacbell dot net |
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