QL datasheet(16/21 Pages) PANASONIC

16 / 21 page

CAUTIONS FOR USE

1) Do not attempt to physically alter

any part of the switch itself, such as

the actuator, or switch attachment

vent, as this may cause alterations to

both characteristics and performance,

and damage the insulation.

2) Do not pour any lubricants such as

oil or grease onto the moving parts of

the actuator, as there is a possibility

that this will cause a malfunction due

to seepage into the inside, and impair

the motion. Silicon-based grease in

particular affects the contact points

badly.

3) If the switches are not to be used for

an extended period of time, their con-

tact reliability may be reduced due to

oxidation of the contact points.

Because accidents may result from the

impaired conductivity, always imple-

ment a check beforehand.

4) Prolonged continuous use of the

switch hastens deterioration of the

parts (especially the seal rubber) and

may cause a malfunction in the

release. For this reason, always imple-

ment a check beforehand.

5) Usage in the vicinity of either the

switch operating position (O.P.) or the

release position (R.P.) results in unsta-

ble contacts. If using the NC contact

point, set the actuator to return to the

free position (F.P.) Also, is using the

NO contact point, hold the ratings val-

ues down to 70 to 100% for the over-

travel (O.T.)

6) If the actuator is forced beyond its

total travel (T.T.), the internal mecha-

nism may be damaged. Always use

within the T.T.

7) Do not apply unreasonable force to

the actuator, as this may result in dam-

age and impaired movement.

8) The switch, if dropped, may break

due to excessive vibration and impact.

Therefore, please use extra caution

when transporting and installing.

9) Condensation inside the switch may

occur if there are rapid ambient tem-

perature changes when the switch is in

a high temperature and humidity.

Since this occurs easily during marine

transport, be extra cautious of what the

environment will be when shipping.

Condensation is the phenomenon in

which water vapor condenses into

switch-adhering water droplets when

the temperature rapidly drops in a

high-temperature, high-humidity

atmosphere or when the switch is

quickly moved from a low temperature

location to a place of high temperature

and high humidity. It is the cause of

insulation deterioration and of rust.

10) Be careful of freezing in tempera-

tures below 0°C. Freezing is the phe-

nomenon in which moisture adhering

to the switch from condensation or

when in unusually high-humidity envi-

ronments freezes onto the switch

when the temperature drops below the

freezing point. Please extra caution

because freezing can lock moving

parts, cause operational delays, or

interfere with conductivity when there

is ice between the contacts.

11) In low-temperature, low-humidity

conditions, plastic becomes brittle and

the rubber and grease harden, which

may lead to malfunction.

12) Long term storage (including dur-

ing transport) in high temperature or

high humidity environments or where

the atmosphere contains organic or

sulfide gas, will cause sulfide or oxide

membrane to form on the contact sur-

faces. This in turn will cause unstable

or failed contacting that may lead to

functional malfunction. Please verify

the atmosphere when storing and

transporting.

13) Packaging should be designed to

reduce as much as possible the poten-

tial influence of humidity, organic gas,

and sulfide gas, etc.

14) Please avoid sudden changes in

temperature. This is a cause of switch

deformation and encourages the seal

structure to breathe, which may lead to

seal failure and operational malfunc-

tion.

15) If installing a thermoplastic resin

case, the use of a spring washer tight-

ened directly against the case will

cause the case to collapse and

become damaged. Therefore, please

add a flat washer before tightening.

Also, be careful not to install if the

case is being twisted.

16) For the purpose of improving quali-

ty, materials and internal structure may

be changed without notice.

17) When used outdoors (in places

where there is exposure to direct sun-

light or rain such as in multistory car

parks) or in ambient temperature envi-

ronments where ozone is generated,

the influence of these environments

may cause deterioration of the rubber

material. Please consult us if you

intend to use a switch in such environ-

ments.

CAUTIONS FOR USE

PRECAUTIONS RELATING TO THE INSTALLATION ENVIRONMENT

Avoid using in silicon environments

such as organic silicon-based rubber,

solvents, sealants, oil, grease, or

wiring.

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