[POLL]Standards requirements

[flamy78]

see the poll
also if somebody would like to start one on 8902A vs 8902MS feel free .

[Hoopty]

I don't know about the 3458 being called for too much, but I do find that some technicians don't realize that it is often overkill.  

Most of the time, there are several suitable subs, that are often more readily available (and less temperature sensitive) around the lab.

Jesse

[flamy78]

Which goes to say they are calling for it when it has no reason to be listed. Also I talked to our counters guy of the moment and the new 53132A is being overlisted. Somebody has Aglient stock that writes these. We've only got one 53132A and where its used its not really needed. Though I do know its needed for 3325A/B on the phase check.

[Hoopty]

Then you could also argue that the 5700A is called for too much also.  We could still be using the 5100B or 829G for many of the procedures that now use the 5700.

The 3458A is becoming more prevalent throughout the PMEL inventory and is becoming the primary DMM of choice.  It is just replacing those older DMMs same as when the 5700 replaced the 5100.  The way I see it, it is really just a natural progression as standards are replaced by better items.

I don't mind that it is called for, as long as the technician recognizes that a substitute is often available.

[flamy78]

On the contrary the 5100B is a POC in most cases though the k6 tests sets can sometime use it. The 5440B however is still quite useable. Also the 5720, 5520, 5500 never quite took off. Though some will have the 5500 or 5520 with a sc300 or sc600

[MIRCS]

On the contrary the 5100B is a POC in most cases though the k6 tests sets can sometime use it. The 5440B however is still quite useable. Also the 5720, 5520, 5500 never quite took off. Though some will have the 5500 or 5520 with a sc300 or sc600

Put the crack pipe down son.......the 5720 never took off?? Is that why people are upgrading their 5700 to 5720??

the 5440B is a POS as they are too old, no longer supported and dying. Moody had three of them just to keep one going.....now they have none. Got a 4808 instead that is actually more accurate than the 5440B on some ranges.

Why would someone have the 5500/5520 with any of the SC options now as everyone has a 9500B/3200???

The 5520A/AF is a great unit. the resistance isn't 1 or 1.9 crap. Does temperature, doesn't need a seperate amplifier for current upto 20A, smaller more compact, for most applications is can be used instead of other standards.

Quit smoking that stuff

[flamy78]

Nice to see you come back. I work at a depot and I think we have 1 5720. I know nothing about the Fluke scope cal's based on a Wavetek design.

[MIRCS]

Moody only had 1 5720, though I believe that a 5700 was being upgraded to a 5720. My guess on the lower number of 5720's is that everyone's 5700's are still alive. Give em time they will all die.

The 9500B are good units once they are figured out on use.

[Hoopty]

First off, I don't know crap about K6, their procedures and whether they still call for the 5100.  I do know that you won't see a 5100 called for very often in K1, K3, or K8 procedures.

As for the 5720, it is Fluke's current model.  They don't make the 5700 anymore and there isn't a huge difference between the two from what I can tell.  MIRCS is right, as the 5700s start to break and new equipment is purchased to replace them, they will be 5720s.  The only other reason would be if a lab buys one to increase its inventory of calibrators.  That's why there are a few around today.

The 5520 was originally purchased as a stand-alone standard specifically for meters.  It was supposed to be accurate enough for all the handhelds and most of the other DMMs and take the workload off the 5700s.  Plus, you no longer needed additional standards for capacitance, temp, or frequency.  Frequency on the 5520 is waaay better than the 5700 and it doesn't require the amplifier to get 20 Amps of current.  The problem is, that it was never written into the procedures, and most folks don't have the time to figure out the specs (I know I didn't).

The 5440B is still the AF standard for DCV.  It is getting hard to get parts, but I don't know of a replacement yet.

[MIRCS]

First off, I don't know crap about K6

That's okay nobody is perfect. We will accept you anyway. Just go and see the Navy guys in Phys-d they might can set you on a path of enlightenment for the metrology world.

By the way....till the day I die I will tell you this.....true K6 technicians that have the touch and know how will always make the best K8 people. Maybe it's the patience they have learned with highly accurate dimensional and optical cals.....or just their techniques.....Don't know, but I truly believe they are the best at K8 as K8 techs if they know the theroy of K6 usually make damn fine K6 techs also. Maybe it's the high precision of both areas.

Not having the time to figure out the specs for the 5520 is no excuse....none I tell you. That bad boy will do just about anything you want for meters. It is also very helpful for scopemeters combined with the 9500B.

There are so many procedures that you have to sub standards it's crazy. Also there are many times where in the past ones didn't have the capability to cal something and it was shipped off.........wait a minute....did they really not have a sub for it instead. Most cases they do, yet there is no thinking outside the box. Ya gotta think outside the box.

Moody and Barksdale were using the 6625AF years before others......main reason they recieved the standard resistors first. That is another nice piece of equipment to use. It will do just about anything you want it to do between auto and manual modes.

[howiesatwork]

Well, over here, we've still got two 5100B's, a 5101B, a 5205, 5200, four 5500A's, two 5700A's, a 5720A, and a 5790A in service...  plus lots of stuff retired...

[flamy78]

Now I hope those that responded took time in the poll. I know I did and judging Hoopty's first response he did too. I think I put a 5 day limit on it so it may poof.

[casey]

5200? Not only do we not have one anymore, we fill in people's 5-level requirements with an N/A in that block.

[Hoopty]

So what do you use for an AC std?  The Datron 4808?  Wasn't that the POS that was supposed to replace the 5200 some years ago?

[flamy78]

yes where do you get the (i may be wrong) 700 VAC @ 25 Hz? Something like that.