northwest QED tips
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Monday December 16 2019 14:19:51 AEDT PM
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link-https://www.facebook.com/groups/245308699667153/403446933853328/?comment_id=403472030517485&reply_comment_id=403476793850342&notif_id=1562580344994993&notif_t=group_comment
Interfacion Pty Ltd is pleased to announce that the QED PI Detector has been modified to allow the use of DD (double D) coils. This change involves a simple change to the electronics within the control box.
The firmware has also been upgraded to include a further improved Ground Balance.
All detectors being delivered to new customers from Monday 5th August 2019 will already have the above upgrades included.
As a show of commitment to all QED owners, the hardware modification to allow use of the DD and CC coils will be provided at no cost.
Of course and as per the QED warranty, the firmware update is provided free of charge, except for P&H.
Any QED owner who plans to attend the Laanecoorie Bash is encouraged to bring their detector along and have it upgraded at no cost.
Standard postage and handling arrangements apply to other owners. Send via Australia Post the box (minus batteries) along with a pre-paid, pre-addressed bag/box to:
Interfacion Pty Ltd
PO Box 106R
Redan VIC 3350
Howard Rockey
Director Interfacion Pty Ltd.

australian electronic gold prospecting forum.com  |  QED users  |  QED users (Moderator: bugwhiskers)  |  Topic: QED tips 0 Members and 1 Guest are viewing this topic. « previous next »
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Goldman
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« Reply #100 on: Monday October 7 2019 16:29:44 AEDT PM »

Battery life
Batteries will last about 3-4 months if they are left in the QED, after which time the batteries may be fully discharged and you will need to throw them away.
 

If you are not going to use your QED for even a few months I advise that you remove the fuse to prevent slow discharge to a point where they cannot be recovered.

Cheers Goldman

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GARY
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« Reply #101 on: Monday October 7 2019 17:12:42 AEDT PM »

That is good to know Goldman.

Also isn't there a certain voltage that the lithium batteries need to be set too if stored longer than 3-4 months?

Gary.  
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dasenator777
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« Reply #102 on: Monday October 7 2019 17:20:30 AEDT PM »

i charge all my batts at the end of each month to keep them tip top shape, i dont use the standard batt set up though.
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Goldman
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« Reply #103 on: Monday October 7 2019 17:36:19 AEDT PM »

  
That is good to know Goldman.

Also isn't there a certain voltage that the lithium batteries need to be set too if stored longer than 3-4 months?

Gary.  

Hi all,

For the most part, the maximum time for 18650 storage before recharge is about one year.
If you are intending long term 18650 storage, a storage charge closer to 50% of usable capacity (~3.7V) rather than 100% (4.2V) will prevent faster battery degradation.

50% = 3.64-3.71

Cheers Goldman
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Goldman
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« Reply #104 on: Thursday October 17 2019 10:00:49 AEDT AM »

Factory Preset Values and THS-B
Once you do a factory preset, all setting values will reset to their default values, including THS-B.

50 is the default factory preset for THS-B, but be aware that 50 is not necessarily the THS-B NULL point (for your QED).

If your QED THS-B NULL is not 50, then it may be noisy detecting using the factory preset values until you adjust THS-B to your normal ‘detecting’ setting.

I have seen QEDs with their NULL at 44, so doing a factory reset with THS-B at 50 will most definitely create noise as 50 is way above the QED’s NULL.

Just something to be mindful of when you are out and about finding gold in our fantastic goldfields.

Cheers Goldman
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Goldman
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« Reply #105 on: Saturday October 19 2019 08:21:56 AEDT AM »

Charging the QED battery extender pack

If you have the battery extender pack attached and connected to the QED, and the batteries are ‘flat’ after having been used to their detecting capacity, then be aware that when being charged by the standard (supplied) charger, the charger will get quite hot and stop charging.

After it has cooled sufficiently, the charging cycle will recommence.

Nothing to worry about, but obviously it will take longer to charge than anticipated.

Cheers
Goldman
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Goldman
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« Reply #106 on: Thursday November 28 2019 20:03:37 AEDT PM »

THS-B NULL and ambient temperature

Now that summer is upon us, ‘tis time for a timely reminder for all to ALWAYS check your THS-B NULL a few minutes after startup.

The NULL point you had in the colder months will be different now that it’s suddenly (much) warmer.

This is very important, as I have been saying for some time now, you MUST know your NULL point whilst detecting so as to squeeze the maximum performance out of your QED and importantly to keep the QED quiet.

My NULL point went up by 2 today because it was hot where I was detecting, compared to my NULL point last Saturday, which was a fairly cool day.

Which meant that I would have been inadvertently 4 under NULL if I had used my previous (cool day) NULL, instead of where I wanted to be of only 1, maybe two under - thus a noisy detector. Note that I was using a THS-A of around 80 today and a Gain of 6, so knowing my NULL was going to be important.

Ambient temperature variation does change the NULL point, so I advise all to check your NULL during your setup phase every time your out and about in our fabulous gold fields.

Cheers Goldman
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GARY
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« Reply #107 on: Saturday December 7 2019 10:34:05 AEDT AM »

I have just finished doing a re-read of all of Goldman's tips from the start to his last current one on THS-B NULL and ambient temperature.

It is amazing the tips I had forgotten about.

Definitely worth doing.

Gary.
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techo_bob
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« Reply #108 on: Monday December 9 2019 10:24:30 AEDT AM »

Is it a posability that the Ths-B function can be made into an auto null function
as I have found some days (yesterday especially) it changes by itself 3-5 points to get critical null
This drove the wife Bonkers. I know critical null centre isn't perfect but you don't loose a lot of depth!!

Cheers Rob..
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Goldman
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« Reply #109 on: Monday December 9 2019 12:33:42 AEDT PM »

  
Is it a posability that the Ths-B function can be made into an auto null function
as I have found some days (yesterday especially) it changes by itself 3-5 points to get critical null
This drove the wife Bonkers. I know critical null centre isn't perfect but you don't loose a lot of depth!!

Cheers Rob..
Gday techno-bob,

Do you have a PL2 and has it been updated with the Aug19 update.

What was the ambient temp when this was happening.

Finally, what did your NULL move from and to - just interested.

PM me if you like

Cheers Goldman
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techo_bob
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« Reply #110 on: Monday December 9 2019 13:14:56 AEDT PM »

Hi goldman
Yes this is one of the more recent PL2s (ser. no 230) purchased from you
This is only a question possibly for howard as I believe this would make the Q.E.D. a very simple M/C to operate
What we found once set up the m/c is very stable on the ground but over a 10oC vatiation it drifts a lot
Yesterdays temp was 14oC when se started to around 30oC at the peak at 2:00 pm
I'm sorry but I cant remember exactly the Ths B figures, but I know it was around 6 times I had to rebalance the null
Ths-A was set at 55, and the ground bal. was approx. 230 and stayed in balance the whole day..
Next time I will use the Q.E.D. and put some time in after I get rid of the sadie and put something a little larger.

Hope this helps Rob..
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bugwhiskers
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« Reply #111 on: Tuesday December 10 2019 07:18:01 AEDT AM »

Higher settings of #3 (THS-A) will result in greater sensitivity / less adjustment range for #2 (THS-B).
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dasenator777
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« Reply #112 on: Tuesday December 10 2019 08:29:01 AEDT AM »

  
Higher settings of #3 (THS-A) will result in greater sensitivity / less adjustment range for #2 (THS-B).
thats how i run mine bugs high ths A, makes it run heaps hotter.
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techo_bob
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« Reply #113 on: Tuesday December 10 2019 11:20:56 AEDT AM »

Thanks Bugs
I was just hoping there could be a way to reduce the thermal component drift
apart from this the m/c is very stable  even over changeable ground

Bob..
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