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Is there a way of making RS232 communication with fluke 8846a faster?

MANVI27 — Tue, 11 Jun 2024 22:18:23 GMT

I’m using Fluke 8846A for measuring current in a setup where the current range is set to 10A. I’m using MEASure method to read value from Fluke 8846a using RS232 communication at baud rate of 115200 with one stop bit and no parity in remote mode. The time taken from the query to receiving the response is roughly 275ms which is a bit high for my application. I would ideally want it to be less than or equal to 50ms. Is there a way to make this communication faster?
Also I’m trying to synchronize this reading from another source so I want to collect data by single trigger which I think MEASure method provides.

Code snippet used for profiling:

query_msg = "MEAS:volt:dc? 10\r"
ser.write(query_msg)
# Receive data until
print(time())
received_data = ser.read(17)
print(time())

Time printed(s) in terminal:
1717717621.2261405
1717717621.5009155

RE: Is there a way of making RS232 communication with fluke 8846a faster?

jc2048 — Wed, 12 Jun 2024 08:44:14 GMT

The 'Extended Specifications' document has a table (scroll down right at the end) of measurement rates which includes the integration times

dam-assets.fluke.com/.../2748044_6200_ENG_B_W_1.PDF

It looks like you can go faster than you're seeing if you're prepared to accept less resolution.

Looking for replacement LCD display for Fluke 79 III Meter.

Peter8322 — Sun, 31 Jul 2022 17:21:54 GMT

Hello I am looking for a replacement LCD screen for my fluke 79 series 3 m does anybody have any ideas where to get this from?

RE: Looking for replacement LCD display for Fluke 79 III Meter.

Karles — Tue, 25 Jul 2023 11:04:15 GMT

Where can I find a reliable supplier for a replacement LCD display for my Fluke 79 III Multimeter?

RE: Looking for replacement LCD display for Fluke 79 III Meter.

Karles — Tue, 25 Jul 2023 11:03:58 GMT

Configure FLUKE CertiFiber Pro on TIA-526-7-A standard

AlexCrt10 — Sat, 07 Jan 2023 10:48:02 GMT

Hello,

I have to configure my FLUKE CertiFiber Pro on TIA-526-7-A standard.

Can anyone help me with that? This standard is not in the TIA list of my FLUKE.

Thanks for your help.

Alex

RE: Looking for replacement LCD display for Fluke 79 III Meter.

michaelkellett — Mon, 01 Aug 2022 08:26:24 GMT

Have you tired Fluke themselves ?

RE: Problem with old Fluke Scopemeter

arp007 — Wed, 11 Nov 2020 01:46:29 GMT

Check polarity, it's backwards on some adapters. PM8907 check inner cavity is negative and outer ring is positive.

Problem with old Fluke Scopemeter

mudz — Fri, 25 Oct 2019 10:55:14 GMT

Today, I received my most awaited thing of this year... After a long long journey it finally reach me.. Hehe .. enough with suspense talk..

Few months ago like 5 months.. I bid for a scopemeter on ebay. This was the first time I did bidding thing. Okay, what stupid thing I did now... Alright, Bidding shot up to almost double and I ended up buying this Fluke 123 Scopemeter which has a line on the display [View:/resized-image/__size/16x16/__key/communityserver-discussions-components-files/59/contentimage_5F00_4027.png:16:16] [View:/resized-image/__size/16x16/__key/communityserver-discussions-components-files/59/contentimage_5F00_4027.png:16:16]

Now after being stuck to customs for almost four months due to no invoice, I finally got the parcel and paid 40% custom duty. [View:/resized-image/__size/16x16/__key/communityserver-discussions-components-files/59/contentimage_5F00_4027.png:16:16]

This thing cost me fortune I could have purchased a nice 2 channel oscilloscope. Stupid me.. (probably till now [mention:b0bc65b9ecdc4307bd967592f00e340a:e9ed411860ed4f2ba0265705b8793d05] will be thinking, this guy is idiot I warned him many times before but he doesn't even listen).. [View:/resized-image/__size/16x16/__key/communityserver-discussions-components-files/59/contentimage_5F00_2516.png:16:16]

Now, this meter is not turning on, I believe after 5 months of no activity battery is probably dead. So I thought to charge it first. There is always a but.. When I checked its adaptors output voltage it is 22.3 volts when it should be 15 volts.
[View:/resized-image/__size/145x194/__key/communityserver-discussions-components-files/59/contentimage_5F00_122154.jpg:145:194][View:/resized-image/__size/145x194/__key/communityserver-discussions-components-files/59/contentimage_5F00_122155.jpg:145:194][View:/resized-image/__size/143x191/__key/communityserver-discussions-components-files/59/contentimage_5F00_122156.jpg:143:191]

Anyone already has this scopemeter? Should I charge it with it? ebay sender told me it was working when he send me the item, but did not about voltages.

scopemeter fluke unlocker function

zim — Sun, 21 Jun 2020 20:36:16 GMT

Please, I have a problem with my Fluke 192B that it has been in the closet for a while and the battery discharged, after turning it on and charging the battery, I cannot leave the screen at start and close the notification with the F4 key, I can connect a probe to channel A and it seems to work, but I can do nothing else or change any parameter. All the keys do not respond except for the “power” and “user” buttons when they are pressed and activated to reset. Otherwise, the "user" button is also dead. This led me to exclude that the keyboard sheet was a problem and that it had never been used. Has anyone gone through this situation? , I tried to reset the device with the "on" and "user" buttons, I heard the device beeps twice, indicates that the reset was successful, but the button still does not work after performing the reset ,,, any help please,

RE: Problem with old Fluke Scopemeter

andi98xp — Thu, 12 Mar 2020 03:33:39 GMT

Hi, Gough Lui

I am late on response but hopefully you get this....

You are correct, I have a Fluke123, and the wall "BRICK" is an unregulated supply... Mine averages 20v... plus or minus, depending on wall voltage until i load it... then about 14v.....

I actually changed my "wall wart" to a regulated 14.5v. I used a switching supply from a business band radio charger and soldered the plug for the Fluke123 on to the output cord...

Works great and no more wall busting brick...

To: Mudz...

My power switch is temperamental on my fluke123... try just lightly tapping it fast... thats the only way i can get mine to come on... Probably switch bounce or something turning it off again when I push to turn it on... LOL

Fluke DSP4000

upstatecabling — Tue, 04 Feb 2020 18:28:36 GMT

Hey everyone,

Not really sure if anyone can help me here or not but I figured it would be worth a shot. I have a cable certifier from Fluke which is a DSP4000. I purchased it used and it was working just fine. After I had it for a month or two it stopped charging on me and kept saying that the batteries did not have a good enough charge to operate. I purchased a new battery for it and I had the same issue. After a little bit, the other unit did the same thing (the remote end). I purchased new batteries which were the same ones that the unit came with, which were not the original batteries. The batteries I have tried are the HQRP 200 mAH Battery. I have returned them and tried different batteries that they have sent as well and each time I have the same issue. Sometimes I can get them charged up enough so that I can use the certifier while it is plugged in via AC adapter but it doesn't always work that way. The status light on the side of the device always says that the charge is complete so I try them and get the issue that there is not enough charge to make it work. I was thinking that this could be an issue with the unit but for it to happen on both devices (the remote and main unit) I find strange. Has anyone seen anything like this or does anyone have a suggestion? I really don't care if I have to use the AC adapter with them either I just need to be able to use them for a few minutes at a time to get the report that it generates. Please let me know, and thanks for any help anyone can offer.

RE: Fluke DSP4000

michaelkellett — Wed, 05 Feb 2020 09:26:16 GMT

It looks as if this instrument is very fussy about batteries:

https://www.flukenetworks.com/knowledge-base/dsp-4x00-cableanalyzer/battery-will-not-hold-its-charge-dsp-4x00-cableanaly…

I suggest you try some batteries that are designed to work with it:

You could try these - from Amazon so you can send them back if they don't work.

https://www.amazon.com/Pack-Fluke-DSP-4000-Battery-Replacement/dp/B01N4KR3G7

RE: Benchtop multimeters

Gough Lui — Tue, 26 Nov 2019 09:29:24 GMT

Strongly agree with michaelkellett on this one - it sounds like you're probably better served by a handheld meter of some type. The Fluke stuff are bulletproof, but I personally go for Keysight DMMs myself because they tend to have the edge on accuracy at a given price point and I'm quite fond of the connectivity options. That being said, each has their own preferences.

In fact, the main draw of higher-resolution bench meters is to do fine measurements, automate measurements via remote control interfaces, do data logging, etc. In fact, often higher-resolution measurements often mean slower conversion times as well. If you don't even need 5-digits, many premium handheld meters can offer 4 and 4.5-digits easily, at a lower price and with the convenience of being able to take anywhere and troubleshoot on site. As an advantage, they'll also work on a power outage .

- Gough

Benchtop multimeters

deoli — Tue, 26 Nov 2019 06:39:07 GMT

New to this site.

Cant decide between two benchtop multimeters

1 Fluke 8808A

2 Keithly 2110 240

Any advice out there?

thanks

RE: Benchtop multimeters

michaelkellett — Tue, 26 Nov 2019 09:19:58 GMT

I wouldn't buy either of those meters - both rather old designs of 5.5 digit DMM.

If you don't need high accuracy and USB/network connectivity - think about getting a Fluke handheld meter - the only problem I've had with them is that they last forever so you don't have the excuse to buy a new one !

They have lots, so I can't recommend one - you'll need to look to select the one that fits what you want best.

RE: Benchtop multimeters

deoli — Tue, 26 Nov 2019 08:54:12 GMT

Thanks Gough

I mainly repair PCB for drives and general repairs of electronics boards.

I want fast continuity function and diode testing with buzzer indication "good/fail", fast readings as well.

Accuracy to 4 decimals not required.

RE: Benchtop multimeters

Gough Lui — Tue, 26 Nov 2019 08:07:13 GMT

I reviewed the Keithley Model 2110 quite a while ago and posted a follow-up:

Other RoadTesters have also reviewed the 2110:

Note that the final three digits is just the voltage the Keithley comes pre-configured for. You can change that by rotating the fuse block. In all, it has been a reliable meter and I'm still using it now, even though it seems to be manufactured for Keithley by Picotest by the looks of it and stock of the 2110 seem to be fairly rare now.

I took a quick look at the Fluke specifications and it seems like an older type of meter. The accuracy specifications are generally similar or slightly lower for the Fluke, and it seems that it doesn't have as many types of supported measurements (e.g. thermocouples, capacitor) and the remote control interface is more old fashioned using RS-232RS-232 whereas the Keithley has USB. On the other side, Fluke does have an innovative 4-wire measurement system assuming you also buy their lead-set, and they have a brand reputation that might be a bit more recognisable than a Keithley OEMed by Picotest. For those that need a display with a great viewing angle, the Fluke has a real VFD where the Keithley 2110 uses an inverse-LCD. That being said, I'm not sure if the 8808A is a "real" Fluke at heart either, having never used one myself.

Really, it depends on what you value most and what your requirements are. What sort of measurements will you be doing? Is automation a big deal? Is accuracy most important? What about warranty/support where you are? etc.

- Gough

RE: Problem with old Fluke Scopemeter

jamesw2965 — Thu, 31 Oct 2019 15:44:00 GMT

Wow, that was some story. From what I know of Fluke you can send it to them to have it fixed. I would first encourage you to look up your fluke device and get all the information on it. I would then download the manual and see if the charger you have is a fluke charger. Second, inquire about having the fluke item checked. If you paid that much for it, you might as well go the distance and make sure it's in perfect working condition.

Good luck.

jamesw

RE: Problem with old Fluke Scopemeter

mudz — Tue, 29 Oct 2019 17:53:01 GMT

just load it upto the rated 300mA and see what it reads then,

How to do this?

RE: Problem with old Fluke Scopemeter

Robert Peter Oakes — Tue, 29 Oct 2019 05:59:46 GMT

probably no soldering needed, just resetting the zebra strips if your lucky

Zebra strips use physical contact only with a little pressure. they are not soldered to the LCD or PCB

RE: Problem with old Fluke Scopemeter

Robert Peter Oakes — Tue, 29 Oct 2019 05:59:03 GMT

Safety Circuit..... ... probably not

cheapest... one diode, next level 2 diodes in a half bridge but requires a center tap transformer which is more expensive, the better would have 4 diodes AKA "FULL BRIDGE RECTIFIER", imaging the rolling mono brow if you get the reference

so even skipped the simple smoothing cap, so if you had 4 diodes and a cap, your doing really well, if it included a thermal fuse then it was getting close to medical grade lol.

RE: Problem with old Fluke Scopemeter

Robert Peter Oakes — Tue, 29 Oct 2019 05:53:28 GMT

The other responses are correct, if this is a basic linear supply (Rectified and smoothed but not regulated, which was very typical in this kind of supply, and why you see that dashed DC line on the label) then on no load, it is possible to have an output sitting at the peak voltage of the sine wave.

the supply is probably not the actual charger, just the raw supply for it, the charging circuit will be inside the meter.

If you want to be sure before you connect it, just load it upto the rated 300mA and see what it reads then, or connect a true 15V dc supply to the meter

hope this helps

Peter

RE: Problem with old Fluke Scopemeter

mudz — Sat, 26 Oct 2019 17:19:20 GMT

it's getting more interesting. This is my findings on battery so far:-

There is no marking on battery not even NiMH or NICd written anywhere just plain blue.

So it seems past owner has replaced it with some other then OEM battery.

Battery voltage between red and black wire is ~5.514v and yet meter shows bar at lowest level, probably if I run it for few more minutes it will switch off.

RE: Problem with old Fluke Scopemeter

mudz — Sat, 26 Oct 2019 16:02:12 GMT

Alright, First things first, battery refresh cycle failed. I charged it for almost whole day now, and it still showing very low battery bar. I'm thinking of removing back cover and checking battery voltage. hmm

Will update soon.