Extech Instruments CG104 Bedienungsanleitung

User Manual

Coating Thickness Tester

Model CG104

Additional User Manual Translations available at www.extech.com

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Introduction

Thank you for selecting the Extech Instruments CG104 Coating Thickness Tester. The CG104 is a

portable meter designed for non-invasive coating thickness measurements with automatic

recognition of the material under test.

The meter uses two measurement methods: magnetic induction (for ferrous metal substrates)

and eddy current (for non-ferrous metal substrates).

This device is shipped fully tested and calibrated and, with proper use, will provide years of

reliable service. Please visit our website (www.extech.com) to check for the latest version of this

User Guide, Product Updates, Product Registration, and Customer Support.

Features

•LED backlighting

•Reversible LCD orientation

•Auto Power OFF

•Low-Battery Indication

•Zero Function and Two-Point Calibration

•Datalogging function

•High-Low Alarm Alerts

•Selectable Measurement Units

•Supplied Zero and Standard Coating Substrates

Description

Meter Description

1. Ferrous/non-ferrous or auto (AT) indicator

2. Unit of measure

3. Measurement reading

4. MENU / Return button

5. Down arrow button

6. ZERO / CLEAR button

7. Backlight and Reverse Display arrow button

8. Escape / Delete button

9. Up Arrow button

10. Sensor

Note: Battery compartment on rear of meter

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Function Keys

Access the Menu / Enter for confirming an edit

Reverse the display orientation/ press > 2 seconds for Backlight

Revert to previous mode / Delete an entry

Selecting functions, scrolling and setting values

Substrate Zero CAL (short press) / Calibration point clear (press > 2 secs.)

Function Key Notes:

ESC and Arrow keys are disabled in the Measurement mode

Backlight and ZERO buttons are disabled in the ‘Options’ menu

Display Icon Description

Fe, nFe Ferrous and Non-ferrous substrates

AT Auto metal sensing mode

▲▼ High-Low Alarm indicators

MEM MIN-MAX-AVG Recording is active

CAL Calibration is active

µm Micrometer unit of measure

mils mils (unit of measure) = millimeters * 2.54/100

MAX-MIN Maximum minus Minimum reading

MIN, MAX, AVG Minimum, Maximum, or Average reading

n Recalled data point storage serial number

Low battery

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Safety Information

CAUTION

•Do not use the unit near devices that generate strong electromagnetic radiation or near a static

electrical charge, as these may cause errors.

•Do not use the unit where it may be exposed to corrosive or explosive gases. The unit may be damaged,

or an explosion may occur.

•Do not keep or use this unit in direct sunlight or where condensation is present. The meter’s housing

could become deformed, its insulation may be damaged, or it may no longer function according to

specification.

•Do not place the meter on or around hot objects (70°C/158°F); otherwise damage to the case is likely.

•If the meter is exposed to significant changes in ambient temperature, allow 30 minutes for

temperature stabilization, before taking measurements.

•Condensation may form on the sensor when moving from a cold to a hot environment. Wait for 10

minutes for condensation to dissipate before taking measurements.

•This unit is not constructed to be waterproof and dustproof. Do not use it in a wet or extremely dusty

environment.

•In order to take accurate measurements, ensure that the sensing tip contacts the coated surface tightly

without a tilt angle.

•Please ensure that there are no air bubbles between substrate and coating.

•Substrate zero calibration must be performed before each use. The enclosed zeroing plates are suitable

for the zeroing calibration as described in this User Guide.

•To ensure measurement accuracy, the Two-point Calibration, as described in this User Guide, is

recommended before each use.

•Zeroing on a specific material substrate still needs to be done before taking formal measurements, such

as for Iron, Steel, Bronze, Copper, Nickel, Zinc, SUS304, etc. This is to avoid measurement errors caused

by the differences in individual substrates. End users can expect the best results on a specific metal by

performing a Zero calibration and a Two-point calibration as described in this User Guide.

WARNING

This instrument uses a magnetic field method to measure the coating thickness on a ferrous

metal base. If this meter is placed in an environment of 20mG (milli Gauss) or above, its

accuracy will be affected. The meter should be kept at least 30cm away from the source of

interference. The list below can be used as a reference for interference potentials.

Electromagnetic field strength is shown in milli Gauss:

Electromagnetic Source: 0cm 30cm

Cellular Phone Charger: 50~ 500 < 1

Notebook Power Supply: 100~ 1000 < 5

LCD Display: 10~ 100 < 1

Fan: 100~ 1000 < 5

Reading Lamp: 400~ 4000 < 10

Note: Any device with an internal coil should be considered as a possible interference

source.

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Operation

Meter Power and Auto Power OFF

The meter powers up automatically when the sensor is pressed against a measurement surface.

If the display does not switch ON, install or replace the batteries. The Auto Power OFF (APO)

feature switches the device OFF after 30 seconds of inactivity. Note that the APO feature is

deactivated while programming in the ‘Options’ menu.

Measurements, ZERO function, and Alarms

Practice with the supplied film and zero reference metal substrates to learn how the meter

operates before moving on to a professional application. The heavier metal substrate is the

ferrous (magnetic) substrate and the lighter metal substrate is the non-ferrous (non-magnetic)

substrate (they are labeled).

When in the AUTO MODE (see ‘Options’ menu) the meter automatically senses ferrous and non-

ferrous substrates (the display icons inform the user) otherwise the user must select ferrous or

non-ferrous in the ‘Options’ menu.

1. Set the meter to ferrous, non-ferrous, or automatic sensing mode in the ‘Options’ menu.

2. Make sure that the tip of the meter is clean of all oil and particles.

3. Press the spring-loaded sensor against the surface of a blank round ferrous or non-

ferrous substrate.

4. While maintaining contact with the substrate, momentarily press the ZERO/CLEAR

button. The meter will beep once and ‘0’ will appear on the display indicating that the

meter has been zeroed.

5. Place a reference film on either the ferrous or non-ferrous substrate.

6. Take a measurement by pressing the spring-loaded sensor against the reference film.

7. The meter will beep once when the measurement is taken. Note the reading on the

display. If it is out of specification perform a calibration.

8. If the coating thickness measurement is above the range of the meter, the meter will

display "---" and emit a series of beeps.

9. If the measured value exceeds the High or Low Alarm limit the meter will emit a series of

beeps and the high alarm (up arrow) or low alarm (down arrow) icon will appear on the

top of the display. Program the High/Low Alarms in the ‘Options’ menu.

CAUTION

Keep the meter clear of Electromagnetic radiation sources as explained in the Safety section of

this User Guide.

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‘Options’ Menu

From the Measurement Mode, press MENU to access the ‘Options’ menu. The CAL icon will blink.

Use the ▲▼ buttons to scroll through the following options; detailed instructions follow this list:

CAL Two-Point Calibration

rEC Record setting/recall (select Recoding ON/OFF for MIN, MAX, AVG, and MAX minus MIN)

ALr High-Low Alarm Settings (select ON or OFF and program alarm limits)

Unt Measurement Units (mils or microns)

FEr Substrate Material setting (select ferrous, non-ferrous, or auto sensing)

CAL - Two-Point Calibration

Use the uncoated substrate and the 1006 μmreference film or use two reference films (one

thinner than the other) of known thickness.

Remove the protective plastic coating from the metal reference standards before use.

Note: To clear previously set calibration points, while in the measuring mode, press and hold

ZERO/CLEAR for at least 2 seconds. The LCD will display "0000".

The maximum possible calibration value is 1006 μm (39.6 mils)

1. Turn on the meter by pressing the tip.

2. Press MENU to access the Two-point Calibration mode. ‘CAL’ will be flashing in the upper

right corner of the display.

3. Press MENU again and the LCD will display Lo in the upper right hand corner.

Use the up and down arrow buttons to set the value to ‘0’ for an uncoated substrate or

to the thickness value of the thinner reference film being used for the calibration.

4. Press MENU/ENTER to confirm the value. The display will flash ‘PUSH’.

5. Press the tip of the gauge to the uncoated substrate for ‘0’ or to the substrate with the

thinner reference film. The gauge will beep once. The low value calibration point is now

set.

6. The LCD will display Hi in the upper right hand corner.

Use the up and down arrow buttons to adjust the display to the value of the thicker

reference film. Use the standard coating plate (1006μm/39.6mils) or a known reference

film that is thicker than the first calibration film.

7. Press MENU/ENTER to confirm the reading. The display will flash ‘PUSH’.

8. Press the tip of the gauge to the thicker reference film. The gauge will beep once and

then return to the measurement mode.The high value calibration point is now set.

9. The meter is now ready to make measurements.

10. To abort at any time without saving the Two-point Calibration, Press ESC/DEL.

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rEC -Record setting/recall (AVG-MIN-MAX-n)

The meter can record up to 255 Average (AVG), Minimum (MIN), Maximum (MAX), and MAX

minus MIN readings for later recall.

1. Turn on the meter by pressing the tip.

2. Press MENU, ‘CAL” will flash, Use the ▲or ▼buttons to select rEC to enter the Recording

setup.

3. Press MENU, use the ▲or ▼button to select Recording ON or OFF.

4. Press MENU/ENTER to confirm the selection.

5. Press MENU/ENTER again to exit the Recording mode. If the Record feature is On, MEM will

appear at the top of the display. (If MEM is not displayed when ON is already selected,

repeat the above steps, first turning this feature OFF and then ON again).

6. When in the Record option, Use the arrows to scroll through the recorded values: MAX,

MIN, MAX-MIN, AVG, #n, and saved readings

#n = the number of saved data points

saved readings = Readings are displayed in sequence.

Deleting Recorded data

1. While in the rEC mode (see paragraph above for Record mode basics), use the arrow keys

to select one of the record options: Max, Min, Max-Min, Avg, #n (Saved values)

Press and hold the ESC button for 5 seconds.

2. Press the ▲or ▼button to select delete NO or YES.

3. To retain your saved readings, Select NO and press MENU/ENTER to revert to the previous

setting.

4. To delete all Records, Select YES and press MENU/ENTER. The meter clear the saved values

and return to the normal measuring mode.

ALr- Alarm setting

The minimum alarm setting is 0 μm (0 mils). The maximum alarm setting is 2000 μm (78.8 mils).

1. Press MENU, ‘CAL” will flash, Use the ▲or ▼buttons to select ALr

2. Press MENU/ENTER to enter the Alarm setup.

3. Use the ▲or ▼button to select High Alarm ON or OFF.

4. Press MENU/ENTER to confirm the selection.

5. Use the arrows ▲▼to set the HI alarm threshold.

6. Press MENU to confirm the high limit value and access the Low Limit mode.

7. Use the ▲or ▼button to select Low Alarm ON or OFF.

8. Press MENU/ENTER to confirm the selection.

9. Use the ▲▼buttons to adjust the low alarm threshold.

10. Press MENU/ENTER to confirm the selection and exit to measure mode.

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Unt - Unit setting

1. Press MENU, ‘CAL” will flash, Use the ▲or ▼buttons to select Unt

2. Press MENU button to enter the Unit selection mode.

3. Use the ▲▼buttons to select μm or mils.

4. Press MENU/ENTER to confirm the selection and to return to the normal measuring mode.

FEr - Substrate material setting

1. Press MENU, ‘CAL” will flash, Use the ▲or ▼buttons to select FEr

2. Press MENU to access the substrate material setting mode.

3. Use the▲▼buttons to select Auto (meter selects material automatically), NON-ferrous

(nonF), or ferrous (FErr) substrate material.

4. Press MENU/ENTER to confirm the selection and to return to the normal measuring mode.

Maintenance

Cleaning and Storage

Periodically wipe the meter housing with a damp cloth and mild detergent; do not use abrasives

or solvents. If the meter is not to be used for 60 days or more, remove the batteries and store

them separately.

Battery Replacement/Installation

1. Remove the Phillips head screw that secures the

rear battery door.

2. Open the battery compartment.

3. Replace/install the two 1.5V ‘AAA’ batteries

observing proper polarity.

4. Secure the battery compartment

Never dispose of used batteries or rechargeable batteries in household waste.

As consumers, users are legally required to take used batteries to appropriate collection sites,

the retail store where the batteries were purchased, or wherever batteries are sold.

Disposal: Do not dispose of this instrument in household waste. The user is obligated to take end-of-life

devices to a designated collection point for the disposal of electrical and electronic equipment.

Battery Safety Reminders

oPlease dispose of batteries responsibly; observe local, state, and national regulations.

oNever dispose of batteries in a fire; batteries may explode or leak.

oNever mix battery types; install new batteries of the same type.

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Specifications

Electrical Specifications

Ferrous

Non-Ferrous

Measurement

principle

Magnetic induction

Eddy current principle

Response time One second

One second

Detectable Substrate

Materials

Iron, Steel

Copper, Aluminum, Zinc,

Bronze, Brass, and others

Measuring range 0~2000μm

0~80.0mils

0~1020μm

0~40.0mils

Accuracy1

(% of reading)

0~199μm: ±(10 dgts)

200~1000μm: (±3.0% + 10 dgts)

1001~1999μm: (±5.0% + 10 dgts)

0~7.8mils: ±(4dgts)

7.9~39.0mils: ±(3% + 4 dgts)

39.1~80.0mils: (±5% + 4 dgts)

0~199μm: ±(10 dgts)

200 ~1020μm: (±3.0% + 10dgts)

0~7.8mils: ±(4 dgts)

7.9~40.0mils: (±3.0% + 4 dgts)

Resolution 0~100μm: (1μm)

100μm~1000μm: (1μm)

1000μm~2000μm: (1μm)

0~10mils: (0.1mils)

10mils~80mils: (0.1mils)

0~100μm: (1μm)

100μm ~1020μm: (1μm)

0~10mils: (0.1mils)

10mils~40.0mils: (0.1mils)

Basic critical thickness 0 to 80mils (0 to 2000um)

0 to 40mils (0 to 1020um)

Industrial standards Conforms to GB/T 4956-1985, GB/T 4957-1985, JB/T 8393-1996, JJG

889-95, and JJG 818-93

Temperature

Coefficient

0.1 times the applicable accuracy specification per °C from 18°C to

28°C (64°F to 82°F)

1Accuracy note: Accuracy statement applies to use on a flat surface, with a zero and a

calibration performed near the thickness of the film to be measured, with an identical base

metal and with the meter stabilized at ambient temperature 18 to 28°C (64 to 82°F).

The accuracy of the reference films or any reference standards should be added to

measurement results.

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General Specifications

Operating Conditions 0°C to 50°C (32°F to 122°F) at < 75% R.H.

Storage Conditions -20°C to 60°C (-4°F to 140°F), 0 to 80% R.H. with battery removed from meter.

Accuracy Conditions Stated accuracy applies for 18°C to 28°C (64°F to 82°F); <75% R.H.

Reference standards Non-ferrous (aluminum), Ferrous, and 1006um(39.6mil) film +/-1%

(CG104-REF)

Auto Power Off 30 seconds

Standby Current Consumption < 6μA

Battery Power 1.5V (AAA) x 2pcs

Battery Life 17 hours continuous use with a typical alkaline battery

Low Battery Indication Icon is displayed when the battery voltage drops below the operating level

Dimensions 105 (H) x 55 (W) x 27 (D) mm (4.1 x 2.2 x 1.1")

Weight Approx. 80g (2.82 oz.) including battery

ISO-9001 Certified

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