QED PL3 User manual

INTERFACION PTY LTD
ACN: 614 858 990
P O BOX 106 R, REDAN VIC 3350. AUSTRALIA
QED –PL3
(With the August 2019 QED Software Update)
OWNERS MANUAL
Proudly made in Ballarat, Victoria, Australia
QED image is for illustration purposes only

2
QED INTRODUCTION
Congratulations on your purchase of the QED Pulse Induction metal
detector. The QED has been engineered specifically to make your
prospecting experience more rewarding.
Whenever you purchase any new technology, there is no point in just
looking at it, or putting it away in the wardrobe. You need to explore
all the new functions and settings to maximize your understanding and
the potential of the device.
If you are an experienced operator, you may find the settings to be
different to anything you have previously used. Whether you are a first
timer or an experienced operator, your confidence will develop as you
master the QED.
Read these instructions carefully to master the QED’s full potential. Be
confident to alter and adjust your settings over known targets until you
have a working understanding of the detector’s potential and character.
This detector has an expansive range of possible settings, and as you
become familiar with all the functions you will maximize your potential
to find gold or relics in even the harshest ground.
Happy hunting

3
DOCUMENT CHANGE CONTROL
Date Document Revised
Version
Nov 2018
QED –PL2 OWNERS MANUAL V 2.0
Dec 2018
QED –PL2 OWNERS MANUAL V 3.0
Dec 2018
QED –PL2 OWNERS MANUAL V 4.0
Jan 2019
QED –PL2 OWNERS MANUAL V 5.0
Jan 2019
QED –PL2 OWNERS MANUAL V 6.0
Aug 2019 (2019 QED Upgrade)
QED –PL2 OWNERS MANUAL V 7.0
Jan 2020
QED –PL2 OWNERS MANUAL V 7.1
May 2020
QED –PL3 OWNERS MANUAL V 1.0
TABLE OF CONTENTS
QED INTRODUCTION.................................................................................... 2
DOCUMENT CHANGE CONTROL............................................................................ 3
TABLE OF CONTENTS............................................................................................. 3
NAVIGATING THE CONTROL INTERFACE ............................................................... 7
START UP............................................................................................................... 8
MENU OPTIONS..................................................................................................... 9
FACTORY DEFAULTS .............................................................................................. 9
QED Software Updates Changes .........................................................................10
QUICK START GUIDE............................................................................................ 11
CONTROL COMMANDS ....................................................................................... 12
MENU CONTROLS................................................................................................ 13
1: MANUAL GND BAL (MGB) .......................................................................... 13
Description..................................................................................................13
YouTube Reference................................................................................. 14
Unable to Ground Balance ......................................................................... 14
Rechecking Ground Balance whilst detecting ............................................ 14
YouTube Reference................................................................................. 14
Notes........................................................................................................... 15
ADVANCED GROUND BALANCE (MGB) TECHNIQUE ...................................... 15
Description..................................................................................................15

4
Notes........................................................................................................... 15
AUTO GND BAL (AGB)..................................................................................... 16
Description..................................................................................................16
YouTube Reference..................................................................................... 16
Notes........................................................................................................... 16
2. THRESHOLD B –(THS-B) (BIAS)...................................................................17
History of THS-B and NULL .........................................................................17
Description..................................................................................................18
Navigating to Threshold B ..........................................................................18
YouTube Reference..................................................................................... 19
Threshold B NULL Position ......................................................................... 19
YouTube Reference..................................................................................... 19
Small Search Coils....................................................................................... 19
Medium Search Coils .................................................................................. 20
Large Search Coils ....................................................................................... 20
Notes........................................................................................................... 20
3: THRESHOLD A –(THS-A) (VOLUME) ........................................................... 21
Description..................................................................................................21
Adjusting..................................................................................................... 21
Threshold A................................................................................................. 21
YouTube Reference..................................................................................... 21
Notes........................................................................................................... 21
4: GAIN............................................................................................................ 22
Description..................................................................................................22
Adjusting Gain............................................................................................. 22
YouTube Reference..................................................................................... 22
Notes........................................................................................................... 22
5: MODE.......................................................................................................... 23
Description..................................................................................................23
Beach Mode................................................................................................ 23
Adjusting Mode .......................................................................................... 24
Youtube Reference ..................................................................................... 24
Notes........................................................................................................... 24
6: SMF (STATIC MAGNETIC FIELDS) ................................................................ 25
Description..................................................................................................25
Adjusting SMF............................................................................................. 25

5
YouTube Reference..................................................................................... 25
Notes........................................................................................................... 25
7: BATTERY......................................................................................................26
Description..................................................................................................26
Fitting the Batteries.................................................................................... 27
Charging Li Ion Batteries............................................................................. 28
Lithium (li ion) Battery Care .......................................................................28
Notes........................................................................................................... 28
8: PITCH........................................................................................................... 29
Description..................................................................................................29
Adjusting Pitch............................................................................................ 29
YouTube Reference..................................................................................... 29
Notes........................................................................................................... 29
9: SMR (SYNCHRONOUS MAINS REJECTION) ................................................. 30
Description..................................................................................................30
YouTube Reference..................................................................................... 30
Notes........................................................................................................... 30
FERRITE EMI SUPPRESSORS................................................................................. 31
STANDARD SPEAKER ........................................................................................... 32
SEARCH COIL TYPES............................................................................................. 33
ADVANCED SETUP GUIDE.................................................................................... 34
HOW TO SEARCH THE GROUND .......................................................................... 35
FINE TUNING EXERCISE ....................................................................................... 36
QED Setup Procedure.......................................................................................... 37
OPTIONAL QED BATTERY EXTENDER................................................................... 40
ADDITIONAL INSTRUCTIONAL VIDEOS ................................................................ 42
Effects of adjusting Gain, Threshold A and Threshold B ................................ 42
Effects of adjusting Threshold B for selected target size............................... 42
Additional Videos by Goldman....................................................................... 42
Additional QED Web Resources .......................................................................... 42
TECHNICAL SPECIFICATIONS................................................................................ 43
MANUFACTURER’S WARRANTY .......................................................................... 44
QED TIPS.............................................................................................................. 45
Coil Choice ...................................................................................................... 45
THS-B............................................................................................................... 45
THS-B and rising pitch targets ........................................................................ 46

6
Factory Preset Values and THS-B....................................................................46
THS-A and THS-B relationship ........................................................................47
Ground noise identification with the latest 2019 upgrade............................ 47
QED and EMI................................................................................................... 48
Ground Balancing with the latest 2019 upgrade ........................................... 48
Manual Ground Balance (MGB) .....................................................................48
QED factory Default Setting ........................................................................... 49
QED and powerlines ....................................................................................... 49
QED Fuse......................................................................................................... 50
Rising vs falling pitch targets.......................................................................... 50
Targets with a long and narrow profile.......................................................... 50
Audio Recovery............................................................................................... 51
Beach Mode.................................................................................................... 51
THS-B NULL Variance...................................................................................... 51
Abnormally Noisy QED ................................................................................... 52
Checking/adjusting Ground Balance on the fly whilst detecting................... 52
Ground Balance Leeway................................................................................. 53
Changing Mode............................................................................................... 53
Detection Hole................................................................................................ 53
Low battery voltage........................................................................................ 54
Charging Your QED ......................................................................................... 55
Charging Your QED battery extender pack..................................................... 55
NOTES ................................................................................................................. 56

7
NAVIGATING THE CONTROL INTERFACE
The button Triangle image on the control box is the TURN ON BUTTON and INCREASE
ADJUSTMENT button.
The button Triangle image on the control box is the DECREASE ADJUSTMENT button.
Use the button to TOGGLE between menu Item Select and Menu Item Adjustment.
Press and hold the button to TURN OFF the detector.
Click on this YouTube link to view an explanation of the QED Control Panel functions.
The display is an all
lighting conditions
3-digit LED backlit
LCD display.

8
START UP
Note: As the QED is marketed in various configurations, these steps are indicative only.
Step 1
Connect a suitable coil.
Step 2
Insert Batteries or connect Battery Pack
Step 3
Turn Detector ON by pressing the BUTTON.
Turn ON the remote SPEAKER pressing the button at side of the speaker housing.
Step 4
Scroll through adjustment menu item numbers by pressing either buttons.
When on the required adjustment menu item number press the button
Step 5
INCREASE variable using or DECREASE using
Step 6
To return to variable menu press the button.
Step 7
To turn detector OFF, press and hold the button and current adjustment settings will be
saved.
Step 8
To reload Factory Default Settings,
•Set the Gain to any number other than 001; or set Mode to any Mode other than 003
•Turn the detector OFF
•Then PRESS and HOLD the button while pressing the button.
•Check Gain, if set to 001 (or Mode is 003), then the Factory Reset has been successful.

9
MENU OPTIONS
1: Manual Ground Balance
2: Threshold B (Bias)
3: Threshold A (Volume)
4: Gain
5: Mode
6: Static Magnetic Fields (SMF)
7: Battery
8: Pitch
9: Synchronous Mains Rejection (SMR)
FACTORY DEFAULTS
Setting
Range
Factory
Default
Manual Ground Balance
1 - 300
150
Threshold B (Bias)
1 –99
50
Threshold A (Volume)
1 –90
30
Gain
1 –10
1
Mode
Gold Detecting in
Mineralised Ground
1 –10
3
Beach Mode
11
3
Static Magnetic Fields (SMF)
1 –100
50
Battery
Displays:
~5.98v –9.99v
Pitch
1 –50
25
Synchronous Mains Rejection (SMR)
1 –200
107

10
QED Software Updates Changes
The Aug 19 Software update introduced the following changes:
1. a significantly different and arguably a much better Ground Balance Technology (called DSM) than the
previous technology, with an expanded MGB Range and Default as per below.
2. Along with this change, the number of Modes was reduced from a total of 16 to a total of 11.
3. In addition, the QED was modified to enable the use of DD Coils.
Setting
Pre-Aug 19 Update
Aug 19 Update
Range
Default
Range
Default
Manual Ground Balance
1 - 200
100
1 - 300
150
Threshold B (Bias)
1 –99
50
1 –99
50
Threshold A (Volume)
1 –90
30
1 –90
30
Gain
1 –10
1
1 –10
1
Mode
Gold Detecting Modes
1 - 15
3
1 –10
3
Beach Mode
16
3
11
3
Static Magnetic Fields (SMF)
1 –100
50
1 –100
50
Battery
Displays:
~5.98v –
9.99v
Displays:
~5.98v –
9.99v
Pitch
1 –50
25
1 –50
25
Synchronous Mains Rejection (SMR)
1 –200
107
1 –200
107
Tip:
To determine whether your QED has had the Aug 19 Update applied, check the number of Modes.
If a maximum of 11, then the QED has been updated with the Aug 19 update.