Users Manual Instruction Manual

Safety Information 3
1788-UM002A-US-P – April 2000
ATTENTION: To avoid possible fire, electric shock, personal injury, or damage to the MediaChecker:
• Do not connect the MediaChecker to any telephony inputs, systems, or equipment, including ISDN. Doing
so is a misapplication of this product, which can result in damage to the instrument and create a potential
shock hazard to the user.
• Do not connect the MediaChecker to active inputs, systems, or equipment. Doing so is a misapplication of
this product, which can result in damage to the instrument and create a potential shock hazard to the
user. Disable network power sources and all communication nodes before connecting the MediaChecker.
• Do not apply more than 25 V dc to any MediaChecker input. Use caution when connecting the
MediaChecker to a network, as voltages greater than 25 V dc may be present on nearby conductors.
• Always turn on the MediaChecker before connecting it to a cable. Turning the MediaChecker on activates
the tool’s input protection circuitry.
• Do not open the MediaChecker's case (except to replace the batteries). No user-serviceable parts are
inside.
• To avoid false test results, replace the batteries as soon as “LOW BATTERY” appears in the display.
• Use only batteries recommended by the manufacturer.
• Do not use the MediaChecker if it is damaged. Protection may be impaired. Inspect the MediaChecker for
physical damage before each use.
• Do not attempt to insert any connector other than an RJ45 connector into the RJ45 jack. Inserting other
connectors, such as RJ11 (telephone) connectors, can permanently damage the jack.
• Do not operate portable transmitting devices during a cable test. Doing so might cause erroneous test
results.
• To avoid false test results, do not run cable tests with cables attached to more than one connector on the
MediaChecker or with network equipment attached to the cable under test.