American Magnetics 135 & 136 Liquid Helium Level Instruments (CE-Marked) - Manual (Page 59)

Rev. 3 47
6 Service Guide
The procedures in this section should only be performed by
Qualified Service Personnel (QSP).
6.1 Troubleshooting Procedures
The following paragraphs serve as an aid to assist QSP in troubleshooting
a potential problem with the Model 135/136. If the QSP is not comfortable
with troubleshooting the system, you may contact an Authorized AMI
Technical Support Representative for assistance. Refer to “Additional
Technical Support” on page 53.
This instrument contains CMOS components which are susceptible to
damage by Electrostatic Discharge (ESD). Take the following precautions
whenever the cover of the instrument is removed.
1. Disassemble the instrument only in a static-free work area.
2. Use a conductive workstation or work area to dissipate static
charge.
3. Use a high resistance grounding wrist strap to reduce static charge
accumulation.
4. Ensure all plastic, paper, vinyl, Styrofoam ® and other static
generating materials are kept away from the work area.
5. Minimize the handling of the instrument and all static sensitive
components.
6. Keep replacement parts in static-free packaging.
7. Do not slide static-sensitive devices over any surface.
8. Use only antistatic type solder suckers.
9. Use only grounded-tip soldering irons.