Portable Test Equipment
User’s Guide
PTE-UGFW56a-EN www.appliedp.com
7.6 Maintenance
The PTE is cooled by variable-speed fans. To get the most reliable performance, ensure proper air
flow for the Product.
Caution
To guarantee correct operation of the PTE:
Do not block the vent openings located at the front panel.
Do not operate the Product in a dusty environment.
Inspect and clean all vent openings at least once a month.
Do not let liquids enter the Product through the vent openings.
Do not use the Product outside its operational temperature range.
Ensure that all cables are in good condition.
Use special (included) plugs that make a firm, secure connection to the
Product’s output binding posts. This is especially true for the current
terminals, which can output 120 A and cause self-heating with loose
fitting plugs.
Inspect the output binding posts prior to use. Repair loose output binding
posts before use.
Do not overload the output by leaving the Product switched on with the
load connected for a long time, especially on 120 A current range and 300
V voltage range.
If instruments to be calibrated are not connected to the Product output
terminals with the original test cables, ensure that cables suitable for the
calibration adjustment voltage and current are used. Maximum output
voltage can reach 300 V ac and the maximum output current can reach
120 A ac.
Do not use the smaller black output current terminals for currents greater
than 12 A. They are intended for indirect meters only
7.6.1 Regular Maintenance
The PTE does not require special maintenance of electrical or mechanical parts. Inspect the output
binding posts for wear and any loose connections. The case and the display can be cleaned by a
microfiber cloth rag moistened with alcohol.
The PTE should be verified at the recommended two years’ interval.
7.6.2 Clean the Product
Caution
To prevent damage to the PTE, do not use aromatic hydrocarbons or
chlorinated solvents for cleaning. They can damage the materials used in the
PTE.
For general cleaning, first disconnect all power input and signal cables. Wipe the PTE with a soft cloth
dampened with water or a non-abrasive mild cleaning solution that does not harm plastics.
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