When using our Encoders, please observe the following cautionary items to prevent dangerous accidents and deterioration of performance.

• 1.Soldering conditions
  When performing solder dipping, check the soldering conditions according to the Individual “Product Specifications,” because the conditions vary from product to product.
  Do not wash an encoder after solder dipping because flux may invade the encoder, resulting in contact failure. Avoid use of jumper cables near the encoders because flux may get to them.
• 2.Shaft rotation wobble
  If the shaft is long, the rotation wobble increases in proportion to its length. To secure the quality of a set, we recommend use of the types with a bushing.
• 3.Operating temperature conditions
  Tactile feeling in operation is given serious consideration, and rotation torque increases under low temperatures (below -10 °C) depending on the product. If an encoder is expected to be used under low temperatures, specify this in advance.

• 1.Chemical resistance
  Before using an encoder with an insulated shaft, be sure to check the reactivity of the shaft with any chemicals to be used.
• 2.Storage conditions
  Do not store the encoders under high temperatures and/or high humidity, or in a location where corrosive gas may be generated. Store the encoders at room temperature and room humidity in a packed condition. Use them within a maximum of 6 months. Check the date of manufacture on the package box and apply the “first-in-first-out” rule. If unpacked encoders must be stored as inventory, store them in a polyethylene bag to keep out air.

• 1.Absolutely avoid use of an encoder beyond its rated range because it may cause a fire. If misuse or abnormal use may result in conditions in which the encoder is used out of its rated range, take proper measures such as current interruption using a protective circuit.
• 2.The grade of nonflammability for resin used in encoders is “94HB,” which is based on UL94 Standards (flammability test for plastic materials). Prohibit use in a location where a spreading fire may be generated or prepare against a spreading fire.

Although care is taken to ensure encoder quality, inferior characteristics, short circuits, and open circuits are some problems that might be generated. To design a set which places maximum emphasis on safety, review the affect of any single fault of an encoder in advance and perform virtually fail-safe design to ensure maximum safety by:

• 1.preparing a protective circuit or a protective device to improve system safety, and
• 2.preparing a redundant circuit to improve system safety so that the single fault of an encoder does not cause a dangerous situation.