American Magnetics 187 Self-Compensating Liquid Level Controller - Manual (Page 62)

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5 Service
5.1 Model 187 Maintenance
The Model 187 was designed and manufactured to give years of reliable
service. The only routine maintenance required is to keep the exterior
surfaces of the instrument clean by gently wiping with a damp cloth
moistened with a mild detergent.
5.2 Model 187 Troubleshooting Hints
The following paragraphs serve as an aid to assist the user in
troubleshooting a potential problem with the Model 187 within a cryogenic
level measurement system. If the user is not comfortable in
troubleshooting the system, you may contact an AMI Technical Support
Representative for assistance. Refer to “Additional Technical Support” on
page 56.
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.