REED GU-3001 User manual

Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Model
Milligauss Meter
GU-3001
reedinstruments
www com
Instruction
Manual
www. .com [e-mail]1.800.561.8187

reedinstruments
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2
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Table of Contents
Features......................................................................................... 3
Specications................................................................................ 4
Instrument Description .................................................................. 5
Operating Instructions................................................................6-8
DC Magnetic Field Measurement ............................................... 6
AC Magnetic Field Measurement ............................................... 7
Data Hold ................................................................................... 7
Data Record (Max., Min. reading)................................................ 7
Auto Power Off Managment........................................................ 8
System Reset ................................................................................ 8
Battery Replacement..................................................................... 8
PC Serial Interface......................................................................... 9
www. .com [e-mail]1.800.561.8187

reedinstruments
www com
3
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Features
• Measures DC and AC magnetic eld measurement
• Wide measure range: ± 3,000 milligauss
• The meter can detect magnetic elds as small as 0.1 milligauss
• N pole/S pole indicator
• High precision magnetometer, even can measure the absolute
environment Earth’s magnetic eld as reference
• Zero adjustment button for relative measurement
• Heavy duty & compact housing with hard carrying case, designed
for easy carry out & operation
• Easy to read LCD with backlight
• Auto power off or manual power off
• Data hold, record max. and min. reading
• High accuracy microcomputer circuit
• Power by UM3/AA (1.5 V) x 6 batteries
• USB/RS232 Computer interface
• Separated probe for easy measurements of multiple environments
For service on this or any other REED product or information on other
REED products, contact REED Instruments at [email protected]
www. .com [e-mail]1.800.561.8187

reedinstruments
www com
4
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Specifications
Circuit: Custom microprocessor LSI circuit
Display: 52mm x 38mm LCD
Measurement Units: mG & uT
Range: -3000mG - 3000mG, -300uT - 300uT
Resolution: 0.1mG: -199.9 - 199.9mG
1mG: ≥200 or ≤ -200mG
00.1uT: -19.9 - 19.9uT
0.1uT: ≥20 or ≤ -20uT
Accuracy: ±(2% + 2mG)
Frequency Response: AC/DC: 40 Hz to 10 KHz
Field Direction: Uniaxail
Sampling Time: Approx. 1 second
Data Output: RS 232/USB PC computer interface
Operating Temperature: 0-50°C (0-122°F)
Operating Humidity: Less than 85% R.H.
Power Supply: UM3/AA (1.5 V) x 6 batteries
Weight: Meter: 350g/0.lb; Probe: 78g/0.17lb
Dimensions: Meter: 173 x 68 x 42mm;
Probe: 177 x 29 x 17mm
Includes: Probe and hard carrying case
Optional accessories: USB cable (USB-01)
Data Acquisition Software (SW-U801-WIN)
Tripod (BS-6)
Visit us at www.reedinstruments.com for more information on our optional
accessories, or e-mail us at [e-mail]
www. .com [e-mail]1.800.561.8187

reedinstruments
www com
5
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Instrument Description
1. Display
2. Power Button
3. Hold Button
4. REC Button
5. Unit/Zero Button
6. AC/DC Button
7. Input Socket
8. Probe Handle
9. Probe Sensor
10. Probe Plug
11. USB/RS232 Output
12. Reset Button
13. AC/DC 9V Power Adapter Input Socket
14. Stand
15. Battery Compartment/Cover
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reedinstruments
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6
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Operating Instructions
While in DC measuring mode, North Poles (positive elds) will be repre-
sented on the screen with an “N”. South Poles (negative elds) will be
represented on the screen with an “S” and a negative sign. While in AC
measuring mode, the screen will display “AC”.
The Magnetic Probe senses either a magnetic push or pull. The sensing
area is the at tip of the sensor.
When the measurement value is over ±3500mG, the display will show
“----” (≥ 3500mG) or “----” (≤ -3500mG).
When you rst turn the meter on, the display will not show a zero value
due to the present natural magnetic eld. Be sure to follow the Zero Ad-
justment procedures described in the DC Magnetic Field procedures.
DC Magnetic Field Measurement
As the device has extremely high sensitivity, the LCD display will vary
greatly even a slight movement the probe. It is recommended to rmly x
the probe before measurement.
1) Turn on the meter by pressing the Power Button. To turn the meter,
hold the Power Button for over 2 seconds.
2) Press the Unit Button to select the unit (mG, uT).
3) Zero Adjust:
Press and hold the Zero Button until the screen displays a zero
value and an “O” symbol. To measure the environment magnetic
value, press and hold the Zero Button again and the “O” symbol
will disappear and the meter will return to showing the Environ-
ment’s magnetic eld value.
4) Hold the Probe Sensor on or close to the testing material.
The Display will show the magnetic eld value along with the unit
(mG, uT).
www. .com [e-mail]1.800.561.8187

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7
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
AC Magnetic Field Measurement
Press the AC/DC Button to switch to AC the Measuring Mode. The display
will show a “AC” symbol, indicating the meter is now in AC Magnetic Field
Mode.
Data Hold
While taking a measurement, press the Hold Button once and the mea-
sured value will hold on the screen, and a HOLD symbol will appear.
Press the Hold Button once again will release the data hold function.
Data Record (Max., Min. reading)
The data record function records the maximum and minimum readings.
Press the REC Button once to start the Data Record function and a “REC”
symbol will appear on the display. With the “REC” symbol on the display:
1) Press the REC Button once, and a ”REC. MAX.” symbol along with
the maximum value will appear on the display. To delete the
maximum value, press the Hold Button once and the display will
show a “REC.” symbol only and execute the memory function
continuously.
2) Press the REC Button again, and a “REC. MIN.” symbol along
with the minimum value will appear on the display. To delete the
minimum value, press the Hold Button once, and the display will
show a “REC.” symbol only and execute the memory function
continuously.
3) To exit the memory record function, press the REC button for 2
seconds. The display will revert to the current reading.
Note: The max and min values present the value of the absolute
measurement value (ignore the negative mark). For example, if the
measurement values are: -19.03uT, -19.02uT, -17.31uT, then the
Max value is -19.03uT, the negative label is just present to show the
direction of the South Pole only.
www. .com [e-mail]1.800.561.8187

reedinstruments
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8
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Auto Power OFF Management
The power management is defaulted to Manual Power off, however the
meter can default to Auto Power off.
1) Press and hold the AC/DC Button until the Display shows “P OFF”.
2) Press the Unit Button and the AC/DC Button together to select
“0” for Manual Power off or “1” for Auto Power off. Press the REC
Button to save the setting, or press the Hold Button to exit without
saving.
System Reset
If an error occurs, press the Reset Button with a Pin. If the Reset Button
does not x the error, please send in the unit to our Calibration Lab for
repair. E-mail [e-mail] for more information.
Battery Replacement
1) When the left corner of LCD display shows , it is necessary to
replace the battery
2) Loosen the screws of the Battery Cover and remove
3) Remove the batteries and replace with Six DC 1.5 V batteries
(UM3, AA, Alkaline/heavy duty)
4) Make sure the battery cover is properly secured after changing the
battery
For service on this or any other REED product or information on other
REED products, contact REED Instruments at [email protected]
www. .com [e-mail]1.800.561.8187

reedinstruments
www com
9
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
PC Serial Interface
The instrument features an PC output via 3.5 mm terminal. The connector
output is a 16 digit data stream which can be utilized to the user’s specic
application. An USB RS232 lead with the following connection will be
required to link the instrument with the PC serial input.
Meter (3.5mm Jack Plug) PC (9W “D” Connector)
Center Pin Pin 2
Ground/Shield Pin 5
The 16 digit data stream will be displayed in the following format:
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
D0 End Word
D1 to D4 Upper Display reading, D1= LSD, D4= MSB
D5 to D8 D5=? D6=? D7=? D8=?
D9 Decimal Point ( DP) for display
0 = No DP, 1 = 1 DP, 2 = 2 DP, 3 = 3 DP
D10 D10 = 0
D11 D11 = 0
D12 D12 = 0
D13 D13 = 0
D14 D14 = 0
D15 Start Word
www. .com [e-mail]1.800.561.8187

reedinstruments
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10
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Notes _________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
www. .com [e-mail]1.800.561.8187

reedinstruments
www com
11
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Notes _________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
www. .com [e-mail]1.800.561.8187

reedinstruments
www com
12
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Notes _________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
www. .com [e-mail]1.800.561.8187