Start up procedure

There are several instruments that you need to start up and verify correct operation. They are:

1. 
   Optional Gamma ray spectrometer
   
2. 
   Computer
   
3. 
   Magnetometer
   
4. 
   Optional Temperature
   
5. 
   Altimeters
   

1. 
   Turn on all devices:
   

1. 
   Magnetometer:
   

Check that the DC/Data Junction Box power indicator is illuminated green. It may be necessary to operate the Power switch on this box if it has been turned off. Always lift and pull the power switch handle to avoid breaking the switch locking mechanism. The Cesium magnetometer needs to operate for 15 minutes to stabilize.

2. 
   Gamma ray spectrometer and detector packs:
   

1. 
   Press and hold the power button until the GR-820 beeps and displays text on its front panel.
   
2. 
   The detector pack is powered on as soon as the main circuit breaker on the power distribution panel is turned on. It should be operated for 5 to 15 minutes (depending upon cabin temperature) to stabilize.
   
1. 
   Printer:
   

4. 
   Computer:
   
   1. 
      Slide the computer display about 2.5 cm (1 inch) out from the rack. Momentarily depress the top of the computer power switch.
      
   2. 
      If the computer display is powered on, its front panel power indicator will glow green or amber depending upon the status of the computer video signal. To turn on the display, press the switch located near the center around the right side of the display.
      
   3. 
      Due to the time required for the power supply to start up, you may see a delay of up to twenty seconds before the computer display will operate.
      

2. 
   Set up Equipment:
   
   1. 
      Set up Gamma Ray Spectrometer:
      

1. 
   Press '1' to start the system test.
   
2. 
   Press 'Shift' to enable the Cesium ground calibration.
   
3. 
   Place the one Cs 137 (Cesium) source above each of the Up detectors and one Cs 137 (Cesium) source below the Down gamma ray detectors.
   
4. 
   Press 'Enter" to begin the Cesium ground calibration. Since this step will take some time, 1 to 5 minutes, you may proceed to steps 3, Log in to the computer, and 4, Set up Setra Baro altimeter, while waiting for ground calibration.
   
5. 
   Record gains and FWHM resolutions, and press 'Stop' when all the peak values are 5 5 +/- 0.1.
   
6. 
   Press 'Stop' twice or until the Top Menu is displayed.
   
7. 
   Press '5' to perform the ground calibration.
   
8. 
   Press the down arrow until the option, Ground Calibration FULL, is highlighted.
   
9. 
   Press 'Enter' to begin Ground Calibration.
   
10. 
    Press 'Enter' to accept 60 second timing.
    
11. 
    The display will indicate, Cs - Press ENTER when ready. If necessary, place the Cesium sources above and below the detector. Then press 'Enter' to begin accumulating Cesium calibration data.
    
12. 
    When the display indicates, B/G - Press ENTER when ready, remove the Cesium sources and press 'Enter' to begin accumulating background calibration data.
    
13. 
    When the display indicates, U- Press ENTER when ready, place the U source below the detector and press 'Enter' to begin accumulating Uranium (Bi) calibration data.
    
14. 
    When the display indicates, Th - Press ENTER when ready, remove the U source and place the Th source below the detector. Then press 'Enter' to begin accumulating Thorium (Tl) calibration data.
    
15. 
    When the Ground Calibration Data screen is displayed, record the calibration information and press 'Stop' twice or until the main menu is displayed. Then remove the Th source.
    
16. 
    Press 'Run' to begin acquiring data.
    
1. 
   Log in to the computer:
   
   1. 
      Wait for the Windows XP boot up to finish.
      
   2. 
      You may then see a screen prompting you for a user name and password. They are as follows:
      

P
Note: Password is blank, but can be changed later if needed.

3. 
   Start up MagLog NT:
   
   1. 
      Double click the "Maglog NT" icon. This should bring you into the opening screen of MagLog NT.
      
   2. 
      From here, select your survey name under the "Open" menu.
      

MagLog NT should be set up with the correct survey parameters that should allow you to immediately start taking measurements.

After you have verified that your instruments are working and you are taking correct data, you can begin Logging your data by going to your file menu and selecting "Start Logging ".

You can also press "Start Printing" to start printing data to your Printrex printer.

Note: These options are also useful when you are doing a turn and do not want to Log your data.


Shut down procedure:

There are several instruments that you need to shut down before removing power from the equipment rack:

1. 
   Computer
   
2. 
   Gamma ray spectrometer
   

1. 
   Stop devices
   
   1. 
      Computer
      
      1. 
         ) Stop MagLog NT operation
         
         1. 
            Verify MagLog NT is not logging data to disk. Stop logging (Ctrl E) if necessary.
            
         2. 
            Terminate Survey (Ctrl T). Click Yes to answer the "Are you sure you want to stop" dialog box.
            
         3. 
            Exit MagLog NT (Alt F4).
            
      2. 
         Shut down Windows
         
         1. 
            Choose Turn Off Computer from the Start Menu.
            
         2. 
            Click on Turn Off Computer icon on the Turn Off Computer Dialog.
            
   2. 
      Gamma ray spectrometer
      
      1. 
         Press the 'Stop' key twice or until the Top Menu is displayed.
         
2. 
   Turn off equipment
   
   1. 
      Computer
      
      1. 
         Momentarily press the top of the front panel display power switch to turn off the display.
         
      2. 
         Verify the computer power LED is not illuminated.
         
         1. 
            If the power LED is illuminated, press and hold the top of the front panel computer power switch to turn off the computer.
            
   2. 
      Gamma Ray Spectrometer
      
      1. 
         Press 'Stop' to display the 'SWITCH OFF - ARE YOU SURE?' message.
         
      2. 
         Press '1 2 3' in sequence to confirm you are ready to power off the spectrometer.
         
      3. 
         Press 'Enter' to shut off the spectrometer.
         
   3. 
      Magnetometer
      
      1. 
         Operate the switch on the DC/Data Junction Box or use the Power Distribution circuit breaker.
         
   4. 
      Power Distribution
      
      1. 
         Pull out the circuit breaker knob to remove power from the rest of the system.
         

MagLog NT Computer System

The rack mount computer chassis is powered from +28 Volts DC. The printer is powered from +28 Volts AC. The LCD display is powered from 120 Volts AC.

Verify the power and on line indicators are on. The error indicator should only be on briefly at the start of printing.

If the error indicator is always on, check paper quantity, and make sure the front panel paper door latches are closed.

G-823A

When the G-823A is used without the AADC, it is powered from +28 Volts DC through the white DC/Data Junction Box.

GR 820 and DET 1024/256

The GR.-820 is powered from +28 Volts DC. The DET 1024/256 is powered from +28 Volts DC.

Check that ADC offset is set correctly. Use Menu 8 and refer to the system calibration sheet.

Make sure that stabilization is set to 'xx' mode (Cs for up and user specified peak for down) and the label is 2615 (indicating Th down). Use Menu 3.

Set a reasonable Count level. Start with 200 counts in an unknown area. Adjust to the count level normally expected in 600 seconds for the area if necessary. Lower the Count Level if the spectrometer displays LOW COUNT warning messages.

Set Timeout on Menu 3 to 2000 seconds.

Verify System test results with Cs (Menu 1) and Ground Calibration Full (Menu 5) with previous results.

Barometric altimeter

The Setra model 470 is powered from +5 Volts DC. Its data output is an RS232 stream.

The Setra model 270 is powered from +28 Volts DC. Its data output is DC voltage proportional to the ambient pressure

Configure the Setra 470 to repeatedly output data with HyperTerminal. Use HyperTerminal to verify correct data transmissions.

Make sure the Setra is connected to the aircraft static air system.

Radar Altimeter

The Terra is powered from +28 Volts DC.

Self test should result in a 40 foot altitude indication.

GPS

Make sure the GPS is calculating a fix within 25 minutes of application of power.

Make sure that the GPS is providing a NMEA $GPGGA sentence to the MagLog computer.

MagLog NT Input Data

G-823 on *COM5

Baud 9600 N 8 1

Configured as if a G881 - no altimeter or depth, just mag field & signal. Display window of 1 slot that displays field and 1 slot that is digital showing signal only.

GPS on *COM6

Baud 9600 N 8 1

Display window is standard GPS with 1.2 km si

Applied Physics Fluxgate on *COM7

Baud 9600 N 8 1

Generic Serial Device Baud 9600 N 8 1 Terminator is 13 (CR) Display window is digital showing X Y and Z values.

GR 820 on *COM8

Baud 19200 N 8 1

Configured as ROI+DN+UP

Display windows of slots 1, 2, 3, 4, 8 that display TC, K, U, T, and U Up

Terra Radar Altimeter on Analog Device 0

Channel 1

Optional Setra 470 Baro Altimeter on COM9

Generic Serial Device Baud 2400 N 8 1 Terminator is 10 (LF) Number of fields is 1 Display window is digital

Optional Setra 270 Baro Altimeter on Analog Device 0

Channel 2

KPCI – 3116 as Analog Device 0

Configured as differential input (Done with driver options) 10 volt FS