RKI Instruments GD-K71D - Manual (Page 15)

PT2E-1052
14
Do not install the detector at places where;
* It is required to stop operation of the equipment where gas detector is installed at
maintenance work.
* It cannot make maintenance without taking off a part of equipment.
* Casing cannot be removed by pipings, rack, etc.
Be sure to ground when install.
４−３．Caution in the system engineering
Unstable power and noise may cause error of performance and alarm.
For the system to use this unit, it is required to make design based on this
manual descriptions.
（１）Stable power used
While the system gets stable at power failure, the external output and alarm contact may be
on and the care for it must be taken. In such case, use the standby battery or take an
appropriate action in the receiver side.
Supply the following power to this unit .
Power
voltage
DC２４V±１０％
Power failure
tolerance
time
Approx 10msec.
（For power failure of 10msec, it re-starts）
To warrant the continuous operation, install the standby battery
outside.
Others
Do not contact with power involving high power load and high
frequency noise.
According to requirement, use line filter and separate it from noise
source.
（２）Designing to consider radiation
When install the closed self-standing control panel, mount the fans in the upper and lower
part.
Do not install it in an equipment that grounding construction is not enough.
CAUTION
Do not install it where it is difficult to make maintenance