Search found 44 matches

by olepagh
Tue Jan 22, 2013 5:10 pm
Forum: PicoLog
Topic: Weird readings from TC-08/USB
Replies: 6
Views: 3736

Re: Weird readings from TC-08/USB

The behavior has been normal since I made the ufinished grounding. Hi Jan. Your solution with grounding is correct. I have had the same experience with several USB TC-08´s and they are very sensitive to even small voltage differences between input terminals and computer chassis/ground. Even isolate...
by olepagh
Sun Feb 12, 2012 7:55 am
Forum: PicoLog
Topic: Reducing tc08 self heating
Replies: 3
Views: 3406

Re: Reducing tc08 self heating

I've written about this issue several times in this forum, but got the answer that TC-08USB was a 'value for money' converter, and there were no plans to re-design it. The CJ compensating layout has a very poor thermal design. The CJC thermistor is placed in air right in the middle between the 8 inp...
by olepagh
Wed Jan 18, 2012 5:56 pm
Forum: PicoLog
Topic: PicoLog problem
Replies: 16
Views: 9944

Re: PicoLog problem

Hitesh. Just briefly checked it out, and it seems to work OK and average between loggings as expected. Only 'nag' so far is that in the opening screen, and in ' Help > ' About ', the copyright statement is not up to date (year). It says Copyright 1997 - 2011 (should be 2012) :wink: Unfortunately som...
by olepagh
Wed Jan 18, 2012 4:59 pm
Forum: PicoLog
Topic: startup with same Picolog settings
Replies: 7
Views: 5746

Re: startup with same Picolog settings

This is what I did (in XP and older systems). There may be other ways. - Make your settings.pls read only with the File Explorer. - Right click settings.pls and choose "Open With". - Select "C:\Program Files\... \ PLW.exe - Check "Always use this program to open..." (Or what it is called in the Engl...
by olepagh
Mon Jan 16, 2012 3:07 pm
Forum: PicoLog
Topic: PicoLog problem
Replies: 16
Views: 9944

Re: PicoLog problem

My colleague has found the cause of the issue and corrected it. The software build should be released sometime next week and will be available from http://www.picotech.com/software.html - it should be numbered after R5.22.2 which is the current stable release and contains some other fixes. Regards,...
by olepagh
Thu Dec 01, 2011 5:09 pm
Forum: PicoLog
Topic: PicoLog problem
Replies: 16
Views: 9944

Re: PicoLog problem

Hi Ole, My colleague has found the cause of the issue and corrected it. The software build should be released sometime next week and will be available from http://www.picotech.com/software.html - it should be numbered after R5.22.2 which is the current stable release and contains some other fixes. ...
by olepagh
Mon Nov 28, 2011 11:56 am
Forum: PicoLog
Topic: PicoLog problem
Replies: 16
Views: 9944

Re: PicoLog problem

Hi Ole, Could I ask which device(s) you are using please? I can't say at this moment in time how long it will take to resolve, but I'll provide an update when I've heard more. Thanks, Hi Hitesh. As I have written earlier, I've seen this issue from the earliest Windows versions of PicoLog and as I h...
by olepagh
Sat Nov 26, 2011 7:27 am
Forum: PicoLog
Topic: PicoLog problem
Replies: 16
Views: 9944

Re: PicoLog problem

There is a bug in the Picolog program that causes the averaging over the sampling period to revert to spot value at the end of the period if 'calculated parameters' are also set. Therefore I must request the Pico people to solve the problem and release an updated version af PicoLog, as I have to us...
by olepagh
Tue Nov 08, 2011 4:24 am
Forum: PicoLog
Topic: PicoLog problem
Replies: 16
Views: 9944

Re: PicoLog problem

The problem consists of PicoLog refusing to store the average value of the readings taken during the sample period (set to 1 minute), with the 'number of readings' set to 'as many as possible'. I find that it is always storing the spot value at the end of the minute, which is no good for my applica...
by olepagh
Tue Aug 16, 2011 6:50 pm
Forum: USB PC Data Loggers
Topic: TC-08 K type thermocoupple length.
Replies: 2
Views: 3649

Re: TC-08 K type thermocoupple length.

Ad.1: Yes thermocouples can be extended, but you have to use a 'compensating' cable, i.e. typically multicore cable made from the same metal alloy as the thermocouple itself, but normally not so pure and therefore cheaper. You also have to connect via "compensation" plugs and sockets, again made fro...
by olepagh
Thu Jul 28, 2011 8:30 am
Forum: PicoLog
Topic: PicoLog in the future?
Replies: 1
Views: 2524

PicoLog in the future?

Hi In another forum on this board, 'Hitesh' wrote the other day: "PicoLog is unlikely to be developed further as PicoScope6's logging capabilities are likely to be developed further." We are (I think) a lot of users that use the more 'slowly' loggers (TC-08, ADC 20/24 etc), and uses the PicoLog SW. ...
by olepagh
Wed Jun 15, 2011 3:30 am
Forum: USB PC Data Loggers
Topic: TC-08 reading
Replies: 7
Views: 4348

Re: TC-08 reading

If I want to use two channels with no CJ. I am limited to a maximum sampling rate of what……….? You cannot measure temperatures with a thermocouple without a Cold Junction compensation. That is a fundamental of thermocouple theory, as you actually measures a voltage difference betveen at least two T...
by olepagh
Tue Apr 12, 2011 3:09 pm
Forum: USB PC Data Loggers
Topic: TC08: Detecting Open and Shorted TC's
Replies: 4
Views: 3813

Re: TC08: Detecting Open and Shorted TC's

ziko wrote:Hi unfortunately the TC-08 cannot detect open circuits,
But it can (and should) be done by redesigning the hardware.

As a professional in the field of accredited calibration, I have worked with numerous TC thermometers and they can all detect an open TC sensor.
by olepagh
Mon Apr 11, 2011 4:25 pm
Forum: USB PC Data Loggers
Topic: TC08: Detecting Open and Shorted TC's
Replies: 4
Views: 3813

Re: TC08: Detecting Open and Shorted TC's

Hi, Can you offer any guidelines on programmatically detecting open and shorted thermocouples? A thermocouple is a short! :shock: If it is short somewhere else than at the measuring point, it just measure the temperature at the short ( or maybe a temperature between the short and the real measuring...
by olepagh
Mon Jan 24, 2011 1:59 pm
Forum: USB PC Data Loggers
Topic: TC-08, change in thermocouple readings
Replies: 3
Views: 3305

Re: TC-08, change in thermocouple readings

That is most likely because you change the TC plug temperature by touching it with your fingers and/or by generating heat by moving the plug in and out of the connector. Where the TC plug enters the TC-08 interface, there are 2 thermocouple junctions, the + wire connecting to the copper or nickel co...