Simpson 228 - 8 Maintenance and Care; Service; Battery Replacement

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6. Turn Function Select Switch to 10 MIU, SHOCK HAZARD.
7. Use Positive Test Lead to probe all accessible conductive surfaces and check
for excessive current leakage. Read the 0-10 MIU scale. If measured current is
less than 1/3 of full scale, increase meter sensitivity by turning the Function
Select switch clockwise until pointer is in upper 2/3 of the dial.
NOTE: ANSI C101.1 limits current leakage to 0.5 MIU RMS for most appliances, but
exceptions are allowed for unique situations. Refer to the equipment manufacturer’s
applicable safety standard for more details.
8. Repeat steps 3 throught 7 for both positions of SW2 within 5 seconds of closing
SW1. If the equipment has multiple separate conductive surfaces, repeat steps
3-8 as quickly as possible for each surface.
9. Continue monitoring leakage current, using the procedure outlined in steps 3-8
above, while equipment warms up and operates normally.
10. Open SW1 and monitor leakage current (using the procedure outlined in steps
3-8 above) until equipment cools or until leakage current stabilizes.
NOTE: If at any time during the test, the equipment under test exceeds the limits
specified by the appropriate safety standard (or by the manufacturer), replace the
equipment or remove it from service until the necessary repairs are complete.
8. MAINTENANCE AND CARE
This Instrument is constructed with high-quality components. Providing reasonable
care and routine maintenance will ensure a long service life of trouble-free operation.
8.1 Service
The Model 228 Current Leakage Tester contains no operator-serviceable parts, ex-
cept for the batteries and the fuse. Refer all service requests to an authorized service
dealer or to the factory.
8.2 Battery Replacement
To install 9 volt NEDA type 1604A alkaline batteries:
1. Turn OFF the Instrument and disconnect the Instrument test leads before opening
the battery compartment.
2. Place the Instrument face-down on a soft, padded surface.
3. Using a flat-blade screwdriver, loosen the large captive screw holding the
battery compartment cover and remove cover.
4. Replace both batteries.
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