Burle 5778 Electron Multiplier Installation Directions

High Performance Multiplier for the HP5971/5972/GCD Mass Selective Detector

Installation Procedure

The plug-in design of the Burle 5778 Electron Multiplier assures easy installation and perfect alignment of the critical ion optics. Keep the detector , all parts and surrounding areas clean during the installation. Follow the direction in the Hewlett-Packard Instrument Manual to vent the MSD and to remove the Mass Spectrometer mounting plate (analyzer) containing the source, quadrapole rods and multiplier.

1. Remove the conventional detector from the quadrapole housing and replace the two screws. Do not tighten these two screws in the housing, leave them slightly loose for the attachment of the 5778 multiplier.

2. Take the supplied signal lead extension barrel and press the receptacle on the lead on the instrument base plate. It may me necessary to adjust the height of this pin. When installed the top of the pin should be the same height above the base plate as the other two pins. If necessary cut to the required height.

Note: If your analyzer feedthrough pins are bent, straighten them. this can most easily be accomplished using two pairs of needle noise pliers. Grasp the end of the pin near the base with one pair of needle noise pliers and CAREFULLY straighten the pin with the second pair of needle noise pliers. Do not put any stress on the ceramic feedthrough or it will break. Broken feedthroughs can be repaired by Scientific Instrument Services.

3. Install the 5778 Multiplier by sliding the front aperture plate between the heads of the two mounting screws and the white mounting plate. While sliding the multiplier front aperture over the screws, align all three feedthrough pins with the female sockets in the bottom the 5778 multiplier detector board. Press the board down until the screws in the mounting plate are up against the slots in the multiplier aperture plate. Tighten the screws.

4. Check that all three feedthrough pins on the base plate are correctly inserted into the multiplier board. The multiplier board should be approximately level with the MSD base plate. The multiplier is now fully installed.

5. Follow the instructions in the Hewlett Packard instrument manual to reinstall the analyzer and pump down the instrument.

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