background image

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ofite.com

10

The Gamma Ray Logger should be calibrated with spectral standards once 

per month, or after the Gamma Ray Logger has been moved. Calibration 

can  also be done more frequently at the user’s discretion. During a spectral 

calibration, the software automatically advances the conveyor belt and scans 

each of three standards (Potassium, Uranium, and Thorium) for 10,000 

seconds each. The total time for the procedure is about nine hours. We 

recommend starting the test at the end of the day so that it can run overnight.  

Always store the Gamma Ray Standards in the horizontal position. Do not 

stand them up vertically.

The limit switch at the end of the conveyor belt is disabled during 

calibrations. It will not stop the motor when a core reaches the end of 

the belt. Before starting the calibration, make sure nothing is on the belt 

between the shield and the limit switch.

Important Notice Concerning Calibration Standards:

 There is no globally 

accepted industry standard or calibration methodology for gamma ray 

standards for spectral gamma ray loggers. The OFITE Spectral Gamma 

Ray standards are manufactured to the following concentrations: 100 ppm 

Uranium, 100 ppm Thorium, and 4.5% Potassium. The standards are 

manufactured in molecular proportions to achieve these concentrations. In 

the event that this calibration standard does not meet desired requirements or 

expectations, please contact OFITE.

1. 

Place the three standards on the belt with Potassium first, then Uranium, 

then Thorium. Place the Potassium standard centered under the shield 

and leave 12 inches between the standards.

Shield

Height Sensor

Calibration

Spectral

Summary of Contents for 700-410

Page 1: ...mma Ray Logger Part No 700 410 Instruction Manual Updated 9 6 2022 Ver 2 OFI Testing Equipment Inc 11302 Steeplecrest Dr Houston Texas 77065 U S A Tele 832 320 7300 Fax 713 880 9886 www ofite com Copy...

Page 2: ...on 2 Description 2 Specifications 2 Components 2 Quick Start 3 Operation 4 Data Export 7 Manual Control 8 Calibration 10 Spectral 10 Belt 15 Software Setup 16 Troubleshooting 20 Belt Adjustment 20 Idl...

Page 3: ...nt are then plotted as a function of depth To begin a test the operator arranges the core samples onto the conveyor belt in order of depth The unit will record background radiation for 15 minutes in o...

Page 4: ...he shield first 3 Click the Start Test button on the Main Screen 4 Enter the well information This information will print on the well log at the end of the test 5 Enter the start and end depth 6 Enter...

Page 5: ...print on the well log at the end of the test 4 Enter the start and end depth 5 Enter a file name and click OK 6 Continue to load cores onto the belt Make sure each core is properly aligned on the bel...

Page 6: ...belt Manual control is disabled as soon as a test is started Drive Mode Position Moves the belt a specified number of feet at maximum velocity Velocity Moves the belt at the specified velocity until...

Page 7: ...Height Displays the height of the current core Current Depth Displays the calculated depth based on the start depth entered at the beginning of the test End of Travel Trip Indicates the sensor at the...

Page 8: ...d the file Gamma Plot ldfx and open it 4 Select Open from the File menu again 5 Find the file Form dat and open it 6 Open Microsoft Excel and open the data file from the Gamma Ray Logger software The...

Page 9: ...tion is for debugging purposes only DigiBASE Realtime This information shows the current runtime parameters for the DigiBASE scanner This information is for debugging purposes only True Time The scann...

Page 10: ...Voltage mode off When High Voltage mode is off the scanner will not collect any data Clear Clears data from the graphs Start Starts logging data Logging will stop at the end of the True Time interval...

Page 11: ...disabled during calibrations It will not stop the motor when a core reaches the end of the belt Before starting the calibration make sure nothing is on the belt between the shield and the limit switc...

Page 12: ...com 11 2 In the Gamma Ray Logger software select Calibrate Spectrum from the Utilities Menu 3 Click the Accept button The software will scan each standard for 10 000 seconds and the automatically adv...

Page 13: ...der the shield 4 Set the True Time to 5 minutes and click the Set True Time button 5 Click the Clear button 6 Click the Start button 7 When the test is complete record the CPS and spectral value for t...

Page 14: ...ts moving wait until there is sufficient space on the belt to place the Thorium standard while allowing a one foot gap to the uranium standard 7 Remove the standards from the belt as they near the lim...

Page 15: ...BASE Manual Control from the Options menu 2 From the drop down menu select the standard you want to calibrate Potassium Uranium Thorium or Gamma API 3 Enter a value for True Time and click the Set Tru...

Page 16: ...records that value in the software The limit switch at the end of the conveyor belt is disabled during calibrations It will not stop the motor when a core reaches the end of the belt Before starting t...

Page 17: ...er to save test data Limit Switch The limit switch at the end of the conveyor belt will stop the motor if a core passes through it during a test To disable the limit switch uncheck this box The limit...

Page 18: ...k the Height Sensor Calibration tab 2 With nothing on the belt enter 0 in the Standard 1 Height field and click the Measure 1 button 3 Place the 4 5 Calibration Gauge 700 410 068 under the scanner 4 E...

Page 19: ...be modified separately Left Enter the distance in pixels from the left side of the screen Width Enter the width in pixels of the graph Top Enter the distance in pixels from the top of the screen Heigh...

Page 20: ...mma TG Potassium K Uranium U and Thorium Th graphs can be changed separately Greatest Min The minimum value on the X axis will scale to the lowest data point on the graph or the Greatest Min value whi...

Page 21: ...ur 4 socket head cap screws 2 Center the conveyor belt by adjusting the two belt tensioner knobs a If the belt needs to move towards the right tighten the belt tensioner knob on the left or loosen the...

Page 22: ...of the conveyor belt will stop the motor if a core passes through it during a test If the belt does not stop when a core reaches the end of the belt check the following 1 The limit switch is disabled...

Page 23: ...nt a The transmitter projects a visible red light When both sensors are in alignment loosen the mounting bracket on the transmitter and adjust its position To confirm the speed of the belt 1 Measure t...

Page 24: ...er Bed clean and smooth f Idler free from damage g No frame damage h Return idlers are clean and turn freely i Damage to return side frame due to mis training 2 Turn the conveyor belt on and run it em...

Page 25: ...ccur as a result of Improper installation or maintenance of the products Misuse Neglect Adjustment by non authorized sources Improper environment Excessive or inadequate heating or air conditioning or...

Reviews: