Does anybody know why multimeter fuses are so well hidden and so damn difficult to replace? Normally you have to take the whole thing apart, with screws hidden under rubber feet, etc..
Over time I have changed many more batteries than fuses so if anything, I would hope that the battery is easier to replace. As a practical matter, replacing the battery or fuse happens so rarely that having to remove the entire back of the meter is not an imposition.
Besides any cost savings, this may also be a case where the manufacturer *wants* someone to see replacing the fuse as a significant repair because safety rated fuses are not the same thing as the general purpose ones most people are familiar with.
Why aren't they under a simple flap or in the battery compartment?
Some multimeters do place the fuse under the battery compartment lid. I expect multimeters built like this gather a whole new set of complaints about how easy it is to lose the lid.
All it takes is for one compromised certificates to be saved for analysis. It is not going to match the standard certificate and either someone forged it with the certificate authority's key or the certificate authority made it. Either way, it represents proof that they were compromised.
So, the only thing that can act as an antenna is something that is hudreds of kilometers long? What is incredibly amazing to me is how people that are completely totally and unquestionably wrong can use their wrongness to accuse people who are correct of not having brains.
In this case what matters most is the length of the conductors. The CME pushes and rings the geomagnetic field like a bell and the magnetic field lines then induce a current in conductors. The voltage difference between the ends of a wire will be proportional to its length so electronics disconnected from the power line are not at risk.
The major power line failures occur in the power transformers which saturate do to the common mode current and self destruct rather violently when their magnetizing current shoots sky high and overheats the winding in short order. And while self destructing, the voltage surges will tend to damage anything downstream.
The effects work the same way as the E3 component of a electromagnetic pulse from a nuclear weapon.
The problem is that the induced common mode current which if a transformer is isolated may cause breakdown and a transformer is grounded will cause core saturation leading to destructive failure. One of the proposed solutions I have seen is to use a very large power resistor in series with the ground connection to limit and absorb the common mode fault current.
I am not sure how vulnerable heavy machinery like pumps and their control circuits would be but even assuming you could disconnect them, how much warning would be available?
We known when CMEs will hit hours to days beforehand but would anybody believe a warning to disconnect equipment?
I find it hard to believe that it couldn't be fixed by replacement cases.
There is a "$150 per day warehousing fee" and whether access would be granted to modify the meters by removing the yellow protector to make them "multimeter parts" is not clear.
I have read that Tektronix got into a spat with Fluke over this with their handheld digital multimeters so they changed the color of their external soft rubber protective case from yellow to blue. I have a DMM916 which has the blue case but you can find examples of the yellow case online with older models of that series of handheld multimeters.
Of course now Tektronix and Fluke are now both owned by Danaher Corporation.
They still do use the correct definition. Some OSes (windows in particular) do not.
And some memory manufacturers, and some processor manufacturers, and some integrated peripheral manufacturers, etc.
Let me know where 65.536 kilobit RAM or ROM in an 8.192k x 8 bit format is advertised. I am also in the market for a DMA controller which supports a 65.536 kilobyte address space.
Ethernet is even more flexible, supporting any frame sizes between 64 bytes to over 9KB, hardware permitting. Note 9KB is not a power of two.
Jumbo frame size restrictions are hardware limitations. The protocol allows sizes up to 2^16-1.
Ethernet jumbo frame length is specified in the encapsulated IP header length field, which is 16 bits wide, when the 16 bit EtherType field is set to 0x8870 instead of an Ethernet frame length below 1536. The hardware does not support the maximum power-of-2 length of 65,535 bytes for the same reason that hard drives do not support their maximum power-of-2 capacity of 2^48 sectors; the interface or protocol sets the ultimate limit.
I am sure that explains all of the time the ACLU said the 2nd Amendment was a collective right, of the militia, and not an individual right. That is still their position and they misrepresented US versus Miller from 1939 to justify it.
I remember very vividly doing this on my 1974 Pinto to test the vacuum assist and the steering wheel not only locked but the force on it made it difficult to return the key to the on position leading to a very exciting few seconds.
There is a quite widespread belief that it can also engage the steering wheel lock, but AFAIK no one has been able to name a car where that happens so far.
With a steering wheel lock integrated with the key on the steering column, turning the key to off to kill the engine but runs the risk of locking the steering.
On my 2002 GMC pickup, without vacuum assist you have to push down on the brake pedal so hard to get even a modicum of effect that you alarmingly bend the steering wheel while using it to hold yourself down.
Modern cars have sufficient braking force to completely stop the engine even at full throttle.
How modern?
My 2002 GMC pickup which is in excellent shape certainly passes this test under normal conditions but if the engine vacuum is lost for whatever reason like the engine stalling, you get one or two pumps of the brake peddle before it becomes so stiff that braking is severely compromised. I found this out the hard way when stopped on a hill with the engine off and I had to push on the brakes hard enough to worry about breaking something (like the steering wheel being used to hold me down to push on the break pedal hard enough to do anything) to stop a gentle roll. Later I tested it by deliberately shutting the engine off while moving.
With older cars I have driven which also had vacuum assisted brakes, they were not nearly so sensitive to the loss of vacuum. I am inclined to think any difference is because of the addition of ABS.
I have actually gone backward with AT&T. I had IPv6 through tunneling for years but in the past few months AT&T started blocking protocol 41 so native IPv6 tunneling is no longer possible. Coincidentally they started blocking it about the same time that they started selling upgrades to support it.
So let me get this straight. In the US, you have the much lauded right to bear arms, but it only applies if you actually fire a shot?
This happened not to long ago in Kansas where a person legally carrying concealed was convicted of a felony for threatening to use deadly force but not actually using it. Had he shot his attacker, he would have saved himself years of legal work.
Slashdot Mirror
Over time I have changed many more batteries than fuses so if anything, I would hope that the battery is easier to replace. As a practical matter, replacing the battery or fuse happens so rarely that having to remove the entire back of the meter is not an imposition.
Besides any cost savings, this may also be a case where the manufacturer *wants* someone to see replacing the fuse as a significant repair because safety rated fuses are not the same thing as the general purpose ones most people are familiar with.
Some multimeters do place the fuse under the battery compartment lid. I expect multimeters built like this gather a whole new set of complaints about how easy it is to lose the lid.
Bench meters may have an externally accessible fuse holder but again, having to change the fuse is a pretty rare event.
All it takes is for one compromised certificates to be saved for analysis. It is not going to match the standard certificate and either someone forged it with the certificate authority's key or the certificate authority made it. Either way, it represents proof that they were compromised.
The March 1989 geomagnetic storm destroyed a transformer at the Salem nuclear power plant:
http://neutronm.bartol.udel.ed...
The transformers can also be damaged and fail at a later time.
They do not keep many if any spares for the larger transformers which are usually custom designs.
This article is from 2009 discusses the capability at that time to manufacture replacements:
http://energyskeptic.com/2013/...
In this case what matters most is the length of the conductors. The CME pushes and rings the geomagnetic field like a bell and the magnetic field lines then induce a current in conductors. The voltage difference between the ends of a wire will be proportional to its length so electronics disconnected from the power line are not at risk.
The major power line failures occur in the power transformers which saturate do to the common mode current and self destruct rather violently when their magnetizing current shoots sky high and overheats the winding in short order. And while self destructing, the voltage surges will tend to damage anything downstream.
The effects work the same way as the E3 component of a electromagnetic pulse from a nuclear weapon.
The problem is that the induced common mode current which if a transformer is isolated may cause breakdown and a transformer is grounded will cause core saturation leading to destructive failure. One of the proposed solutions I have seen is to use a very large power resistor in series with the ground connection to limit and absorb the common mode fault current.
I am not sure how vulnerable heavy machinery like pumps and their control circuits would be but even assuming you could disconnect them, how much warning would be available?
We known when CMEs will hit hours to days beforehand but would anybody believe a warning to disconnect equipment?
Meanwhile the $150 per day warehouse fee is adding up making the loss even greater.
There is a "$150 per day warehousing fee" and whether access would be granted to modify the meters by removing the yellow protector to make them "multimeter parts" is not clear.
I have read that Tektronix got into a spat with Fluke over this with their handheld digital multimeters so they changed the color of their external soft rubber protective case from yellow to blue. I have a DMM916 which has the blue case but you can find examples of the yellow case online with older models of that series of handheld multimeters.
Of course now Tektronix and Fluke are now both owned by Danaher Corporation.
And some memory manufacturers, and some processor manufacturers, and some integrated peripheral manufacturers, etc.
Let me know where 65.536 kilobit RAM or ROM in an 8.192k x 8 bit format is advertised. I am also in the market for a DMA controller which supports a 65.536 kilobyte address space.
It also contains the code executed in System Management Mode (SMM) which may handle tasks like legacy emulation and thermal control.
Jumbo frame size restrictions are hardware limitations. The protocol allows sizes up to 2^16-1.
Ethernet jumbo frame length is specified in the encapsulated IP header length field, which is 16 bits wide, when the 16 bit EtherType field is set to 0x8870 instead of an Ethernet frame length below 1536. The hardware does not support the maximum power-of-2 length of 65,535 bytes for the same reason that hard drives do not support their maximum power-of-2 capacity of 2^48 sectors; the interface or protocol sets the ultimate limit.
I am sure that explains all of the time the ACLU said the 2nd Amendment was a collective right, of the militia, and not an individual right. That is still their position and they misrepresented US versus Miller from 1939 to justify it.
Aluminum?
Instead of using the exchange to steal the coins of others, I would use it to launder money. Aren't casinos used the same way?
I remember very vividly doing this on my 1974 Pinto to test the vacuum assist and the steering wheel not only locked but the force on it made it difficult to return the key to the on position leading to a very exciting few seconds.
With a steering wheel lock integrated with the key on the steering column, turning the key to off to kill the engine but runs the risk of locking the steering.
On my 2002 GMC pickup, without vacuum assist you have to push down on the brake pedal so hard to get even a modicum of effect that you alarmingly bend the steering wheel while using it to hold yourself down.
How modern?
My 2002 GMC pickup which is in excellent shape certainly passes this test under normal conditions but if the engine vacuum is lost for whatever reason like the engine stalling, you get one or two pumps of the brake peddle before it becomes so stiff that braking is severely compromised. I found this out the hard way when stopped on a hill with the engine off and I had to push on the brakes hard enough to worry about breaking something (like the steering wheel being used to hold me down to push on the break pedal hard enough to do anything) to stop a gentle roll. Later I tested it by deliberately shutting the engine off while moving.
With older cars I have driven which also had vacuum assisted brakes, they were not nearly so sensitive to the loss of vacuum. I am inclined to think any difference is because of the addition of ABS.
And on a lot of desktops, the code operating in System Management Mode can arbitrarily decide to interrupt anything.
I have actually gone backward with AT&T. I had IPv6 through tunneling for years but in the past few months AT&T started blocking protocol 41 so native IPv6 tunneling is no longer possible. Coincidentally they started blocking it about the same time that they started selling upgrades to support it.
But not too much money for AT&T to block it unless you pay them extra for their own IPv6 service.
And yet AT&T blocks IPv6. I had IPv6 through tunneling for many years until they "upgraded".
This happened not to long ago in Kansas where a person legally carrying concealed was convicted of a felony for threatening to use deadly force but not actually using it. Had he shot his attacker, he would have saved himself years of legal work.