Ceilometer CT25K
User’s Guide CT25K-U059en-2.1
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GROUND THE INSTRUMENT
To minimize shock hazard, the instrument chassis and cabinet must be
connected to an electrical ground. The instrument is equipped with a
three-conductor AC power connector. The power cable must either be
plugged into an approved three-contact electrical outlet or the instrument must
be carefully earthed to a low-resistance safety ground.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes.
Operation of any electrical instrument in such an environment constitutes a
definite safety hazard.
DO NOT SERVICE OR ADJUST ALONE
Do not attempt internal service or adjustment unless another person, capable
of rendering first aid and resuscitation, is present.
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT
Because of the danger of introducing additional hazards, do not install
substitute parts or perform any unauthorized modification to the instrument.
Return the instrument to a VAISALA office or authorized Depot for service
and repair to ensure that safety features are maintained.
KEEP AWAY FROM LIVE CIRCUITS
Operating personnel must not remove instrument covers. Component
replacement and internal adjustments must be made by qualified maintenance
personnel. Do not replace components with power cable connected. Under
certain conditions, dangerous voltages may exist even with the power cable
removed. To avoid injuries, always disconnect power and discharge circuits
before touching them.
High voltage will be readily accessible when the transmitter (CTT21) or
receiver (CTR21) covers are removed and they are connected to a powered
unit. High voltage is present in the Line and Power Interface Subassembly
(CTP241), the Internal Heaters subassembly, the Frame (DMF51) Mother
Board, and the Window Conditioners at the top of the Shield.
Transmitter (CTT21), Receiver (CTR21), and Line and Power Input
Subassembly (CTP241) have the following warning label:
WARNING! +,*+9 2/7$*(, 16,' (7+,6( 1&/26 85(
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