2
2.2 Electrostatic Discharge (ESD)
Handling Procedure
Magnetrol/STI’s electronic instruments are manufactured
to the highest quality standards. These instruments use
electronic components that may be damaged by static elec-
tricity present in most work environments.
The following steps are recommended to reduce the risk of
component failure due to electrostatic discharge.
•Ship and store circuit boards in anti-static bags. If an anti-
static bag is not available, wrap the board in aluminum
foil. Do not place boards on foam packing materials.
•Use a grounding wrist strap when installing and removing
circuit boards. A grounded workstation is recommended.
•Handle circuit boards only by the edges. Do not touch
components or connector pins.
•Make sure that all electrical connections are completely
made and none are partial or floating. Ground all equip-
ment to a good, earth ground.
2.3 Preliminary Operational Check
After unpacking and before installation, perform the
following operational check on the unit in a non-
hazardous area:
1. Apply proper operating voltage to terminals L1 and L2/N.
Power supply ground should be connected to the green
ground screw in housing base.
2. Fill a suitable container with liquid.
3. Place transducer gap in the liquid. The relay output should
actuate.
4. Remove transducer from the liquid. The relay output
should de-actuate. In case of malfunction, consult
Section 3.1, Troubleshooting on page 6.
Caution: This unit contains CMOS electronics which may become
damaged by static electricity. Do not touch any semicon-
ductor devices unless you are properly grounded.
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