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CG204-EU-EN  V2.1   3/11 

Quick Start Instructions 

Meter Power 

 

Press the power button   to switch the meter ON. The display will switch ON. If the 
display does not switch ON, replace the batteries.  

Measurements 

 

Use the supplied film references and zero reference metal substrates to learn how the 
meter operates before moving to a professional application. The round metal substrate is 
the ferrous (magnetic) substrate and the rectangular shaped metal substrate is the non-
ferrous (non-magnetic) substrate. The meter automatically senses ferrous or non-ferrous 
substrates. 

1.  Place a reference film (250

μ

m, for example) on the round, ferrous substrate. 

2.  Place the spring-loaded meter sensor against the reference film. 
3.  In the single mode the meter will emit an audible tone indicating that the 

measurement has been taken. 

4.  In the continuous mode the display will continually measure and update the display 

5.  The LCD will show the reading (250

μ

m) at the center of the display area. 

6.  A typical display will also show the following: 

  NO = 1 (reading number one) on the lower left of 

the LCD 

  AVG = 250

μ

m (running average) on the lower right 

  DIR = DIR mode of operation on the upper left 

  Fe = Ferrous substrate on the upper right of the 

LCD 

    
Experiment with the remaining reference films and the  substrate before using the meter 
professionally.  

 Automatic Power OFF 

In order to conserve battery life, the meter will automatically turn off after approximately 3 
minutes. To defeat this feature use the programming menu detailed in the next section 
(menu parameter AUTO POWER OFF under OPTIONS). 

LCD Backlight Button 

The LCD is equipped with backlighting for easier viewing, especially in dimly lit areas. 
Press the backlight button to turn the backlight on. Press again to turn the backlight off. To 
enable/disable the LCD backlighting, use the BACKLIGHT parameter under OPTIONS in 
the programming menu. 

Factory Default Reset 

To restore the meter to its original factory default settings: 

1.  Turn the meter OFF. 
2.  Press and hold the ZERO button while switching the meter ON. 
3.  When the meter powers up, the display will prompt for a YES or NO. 
4.  Press the SET button for YES or the CANCEL button for NO. 
5.  Note that all data in all memory locations will be erased, in addition to statistics, 

calibration values, and alarm limits. 

 

DIR

um

AVG=250

NO=1

250

Fe

www.burntec.com

Summary of Contents for CG204

Page 1: ...User s Guide Extech CG204 Coating Thickness Tester www burntec com ...

Page 2: ...2 Measurement probe 3 Backlit LCD display 4 SET OK YES MENU SELECT button 5 UP LEFT ARROW button 6 Power ON OFF button 7 CANCEL ESC NO BACK button menu mode and Backlight ON OFF normal mode 8 DOWN ARROW RIGHT button 9 ZERO calibration button Note Battery compartment on rear of meter Display Icon Description NFe Non ferrous metals Fe Ferrous metals AUTO Automatic substrate recognition F or N Calibr...

Page 3: ... the LCD AVG 250μm running average on the lower right DIR DIR mode of operation on the upper left Fe Ferrous substrate on the upper right of the LCD Experiment with the remaining reference films and the substrate before using the meter professionally Automatic Power OFF In order to conserve battery life the meter will automatically turn off after approximately 3 minutes To defeat this feature use ...

Page 4: ...No Fe Non ferrous measurement mode μm Micrometers mils Mils mm 2 54 100 Unit settings mm Millimeters ON Enables backlight operation Backlight OFF Disables backlight operation AVG Average of a series of readings MAX Lowest of a series of readings MIN Highest of a series of readings LCD Statistics SDEV Standard deviation of a series Enable Allows auto power off to operate OPTIONS Auto Power OFF Disa...

Page 5: ...OUS measurement mode the meter displays a running average of readings as they are taken Note that the audible measurement beep is not active in this mode In the SINGLE measurement mode measurements are taken one at a time Single mode measurement readings are accompanied by an audible tone b Working Modes Select DIRECT or GROUP 1 2 3 or 4 under WORKING MODES in the OPTIONS Menu using the arrow butt...

Page 6: ...n turn the light on or off using the backlight button CANCEL button f LCD Statistics Select AVERAGE MINIMUM MAXIMUM or SDEV Standard Deviation under LCD STATISTICS in the OPTIONS Menu using the arrow buttons and the SELECT soft key This selection determines which statistic is shown as default on the LCD display g Auto Power OFF Select ENABLE or DISABLE under AUTO POWER OFF in the OPTIONS Menu usin...

Page 7: ...to open the MEASUREMENT VIEW parameter 4 User the ARROW buttons to scroll through the stored readings CALIBRATION Menu The Calibration menu allows the user to enable disable the calibration utility The Calibration menu also allows the user to delete Zero calibration data for both ferrous Zero F and non ferrous Zero N modes 1 Press the MENU button to access the programming menu 2 User the DOWN ARRO...

Page 8: ...urvature radius Substrate material properties Substrate thickness Size of measurement area The point at which the calibration is made on the calibration sample must always be identical with the point of measurement on the product itself especially in the case of corners and edges of small parts To achieve the highest measurement accuracy perform several calibrations in succession for zero values a...

Page 9: ... off the substrate d Press MENU and then scroll down to Calibration e Press Select to highlight the Enable function and then press Select f Press Esc and the meter will enter the calibration mode g Adjust the reading to match the known value of the reference film using the and buttons h Turn the meter OFF to exit and save the calibration data 3 The meter is now calibrated to the base material and ...

Page 10: ...ice to be tested 2 Take approx 10 readings on the uncoated shot blasted sample to produce the mean value Xo 3 Take an additional 10 readings on the coated shot blasted test sample to produce the mean value Xm 4 The difference between the two mean values is the mean coating thickness Xeff over the peaks The greater standard deviation S of the two values Xm and Xo should also be taken into considera...

Page 11: ...es how the sample value is distributed around the sample mean The standard deviation of a set of numbers is the root mean square of the variance S 2 The variance of a list is the square of the standard deviation of the list that is the average of the squares of the deviations of the numbers in the list from their mean divided by the number of readings 1 Variance S 2 1 2 n x x Standard deviation S ...

Page 12: ...y wipe the meter housing with a damp cloth and mild detergent do not use abra sives 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 instructions 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 4 Secure the bat...

Page 13: ...ure radius 1 5mm 3mm Diameter of Min area 7mm 5mm Basic critical thickness 0 5mm 0 3mm Industrial standards Conforms to GB T 4956 1985 GB T 4957 1985 JB T 8393 1996 JJG 889 95 and JJG 818 93 Operating Temperature 0 C 40 C 32 F 104 F Operating Relative Humidity R H 20 90 Relative Humidity Dimensions 110 x 50 x 23mm 4 3 x 2 0 x 1 0 Weight 100g 3 9 oz 1 Accuracy statement applies on a flat surface wi...

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