This instrument collects action acceleration on the ground from three directions of X/Y/Z during
earthquake striking for detecting the coming seismic accurately. When wave P is coming, acceleration
sensor can feel the shock from the vertical direction in seismic early time, and signal will be output, then
it will be amplified by filtration and then to be sent to microprocessor control by digital
converter for being treated correspondingly. The same ,when wave S is coming, acceleration sensor can
feel the shock from the horizontal direction in seismic early time, and signal will be output, then it will be
amplified by filtration and then to be sent to microprocessor control by digital converter for being
treated correspondingly.
This instrument has three channels of relay output, they are level I alarm output, level II alarm output
and instrument failure alarm output. They are connected into operation control system of elevator
separately for being collected by elevator control system. Alarm level I will be output when the
instrument detects wave P in seismic early time or lower seismic acceleration speed. It is primary output
for alarming the possible coming seismic. If there is no alarm level II output 10 seconds after alarm level
one action, it will reset automatically and contactor signal will disappear. Alarm level II output is for
higher action acceleration speed on the ground, it can’t be reset automatically. Only after elevator
engineer check the elevator and ensure that the elevator works normally, it will be reset manually. When
instrument failure happens, the failure alarm contactor signal will be sent out. Once this signal is send
continuously, it means the product needs to be repaired back to the manufacturer.
Indicator Instruction
Indicator has two colors. Normally, indicator is green. When alarm level I contactor is output, red
indicator will glimmer; when alarm level II contactor is output, red indicator will glimmer faster, when
automatic examination failed, green indicator will glimmer ( type of PQM3000 also has instrument failure
alarm output at the same time ).
