X8Proteum

• For the Microstar see the separate Technical User manual
• Safety instructions
• Maintenance and repairs
• Troubleshooting

Safety instructions

• X-ray
• Beryllium

Safety rules as addition to the User Manual:

• The equipment must be serviced and maintained by qualified personnel who are trained with the hazards of and precaution against X-ray exposure.
• The equipment contains safety circuits which should not be overridden, other than supplied: the service key, door lock connector and beamstop override vane. These overrides may only be used for service and maintenance.
• When using the beamstop override vane (only for alignment) the system must not be left unattended. Theta always at 0° and a low kV/mA setting as described in the alignment instructions.
• Safety circuits must be tested by service personnel or the safety officer at least every 12 months, as described in Maintenance
• The collimator must always be installed.

The detector and X-ray tube contains windows of beryllium. In normal use these area's cannot be reached, but during maintenance, care must be taken not to touch these windows. When by accident the beryllium is touched, wash with soap and water.

Fumes and dust from beryllium metal can be hazardous if inhaled. During use, corrosion of the beryllium window may occur, but it should not be cut, machined or otherwise removed. Tube and detector disposal must comply with the national and local regulations governing beryllium.
 

Maintenance

• Cleaning
• Tools
• Server program
• Safety test
• Alignment, X-ray optics
• Mirror (pdf). For both Montel 200 and Helios-Cu.
• Xyclops Instruction manual (pdf)
• Goniometer (pdf). (The Helios-Cu beam is smaller than the Montel 200 optic so the alignment is more sensitive to variations in goniometer- and/or beam position)
• Effic measurement (to check intensity)
• Repair small shutter

Cleaning

For cleaning use a damp cloth, moistened with water or isopropyl alcohol. No cleaning agent may enter the goniometer.
 

Tools

• Absorber: Zirconium (for Mo) or Nickel (for Cu) filter, placed on the collimator to attenuate the intensity of the primary beam to a measurable and save level. It is only allowed to used with low kV/mA settings. Specification:
• Mo: 7 foils of 0.108 mm Zr, attenuation approx. 2400x
• Cu: 9 foils of 0.02 mm Ni, attenuation approx. 1900x
• Half-beam absorber: a 2 mm bar, placed in the crystal head.
• Safety overrides, only allowed to be used during technical maintenance (see safety rules).
• Service switch which overrides the radiation enclosure safety. This state is signalled by the flashing Service  lamp.
• Door lock connector which overrides the door lock safety.
• Beamstop override vane. There are no extra warnings.
• Test crystal: Ylid

Server program

If the server program window is not visible it can be restored by editing a new line with SHOWWINDOW in C:\program files\brukeraxs\bcp and pis\KCCD.SET
 
 

Safety test

This test it limited to some safeties in the goniometer without an internal failure check:

Shutter safety

• Switch off the X-ray high voltage
• Open the shutter in Server with Acquisition, Toggle shutter.
• Check if the shutter not open after activating the next unsafe conditions. The shutter must remain closed after reestablishment of the safety (except the shutter lamps):
• Collimator removed.
• Beamstop removed.

With Effic the total efficiency is measured from X-ray generation - optics - detector. The measurement below is for PT135 detector and Helios or Montel 200 (both Cu).

1. Close all programs on the server PC
2. Start BIS and BCP ( ‘Master (full control)’ option)
3. Install:
• Collimator
• For Helios-Cu:   M14-30 0.3xF
• For Montel 200:  open beam pipe
• Attenuator tool (delivered with the system) on the collimator.
• DX = 230 mm (automaticly set by BCP)
• Power 45kV 60mA (2.7 kW)
4. Select in BCP menu ‘Tools’, ‘Half-beam’ and set:
• Seconds per exposure = 1.0 s
• Number of exposures to average = 1
• ’Continuous’  and   ‘Collimator tool’
• Pixels:  Width = 112, Height = 112  (with up/down)
• Start
5. The program shows the intensity in ADU/s (Analog-Digital Units) of the PT135 detector (with Cu-gain of 2.91 ADU/photon)
• Microstar-H (with Helios Cu mirror):  >340000 ADU/s
• Microstar with Montel 200: >65000 ADU/s
• with Microstar-H focus cup: >130000 ADU/s

Troubleshooting

When consulting Service always run D8tools, make a status file (.sts) and send it to the service center

• General:
• Contacting service
• Mention in the email subject: SCD and the System Serial number
• Start-up problems
• Shutter does not open
• HV goes off
• Collision and maximum angle switch
• X-ray intensity or images problem
• Detector problems
• Lytron cooler

Serial number
 

A service department will often ask for the system serial number. All parts has its own serial  number, but also the whole system has a serial number. It is a number 1-9999 and is normally placed under the table above the keyswitches However a lot of X8Proteum are delivered without this serial number.

Start-up problems

• PC-server program remains in: present operation = Goninit
• Kappa does not move and Omega is slowly running to its maximum position: check the dummy plug on the goniometer connector 'Limit switch'. Before replacing first switch off/on the Interface.
• Add skip_zero in the start-up file C:\Program Files\BrukerAXS\BCP and BIS\KCCD.SET the line:  SKIP_ZERO.  (take care to remove this line after testing !) After start-up:
• Present operation = none (system has started) : It is a problem in the goniometer. Inform the service department
• Present operation = Goninit (system does not start) : It is a problem in the Interface.
• Starting BIS gives no response: Ctrl-Alt-del, Task Manager, end all InstrumentServi processes
• PT135 detector:
• CCD temperature rising
• High pressure cooler

This is normal during startup. The cooler starts 3 minutes after power on to prevent switching of the fuse because of a too large start current. In this time the pressure (meter on the cooler) will be high and the CCD temperature is slowly rising. But even permanent without cooling the CCD will not rise higher then about 70 C which does not harm the detector. When the cooler starts, pressure will fall down and after a short time also the CCD temperature wil decrease.
 

Shutter does not open

• The shutter is normally closed when
• The collimator is not in the right position.
• The monochromator or X-ray port is not in the right position.
• The beamstop is not mounted.
• The shutter open lamps are defect.
• The radiation enclosure is not closed.

Collision and maximum angle switch

The anti-collision software prevents the goniometer from colliding with the collimator holders or the axis to run past their limits. When a collision takes place because of unexpected circumstances, like a technical error, it is sometimes possible to return:

1. On the Server computer a menu appears.
2. Choose the axis and direction to run out of collision.
3. Press the overrule button at the back of the goniometer. The axis now positions a small step.
4. If not enough: repeat. As soon as the collision switch is released, the goniometer starts to relocate the zero position.