RKI Instruments SD-705EC - Manual (Page 16)

PT2E-1140
Normally-closed contact(Break contact) at non-existing condition may
change to open contact in a moment due to physical shock.
Whenever alarm signals from gas detectors are used with normally-closed
contact, please put delayed circuit(for about one second) to receiver side of
normally-closed contact to avoid such phenomenon.
！ CAUTION
(FOR USE OF NORMALY-CLOSED CONTACT)
Trouble alarm contact is an option. Please contact with our nearest agent or
RIKEN KEIKI if it is intended to use.
！ CAUTION
(4 ) Install the lid and 6 hexagonal socket headed bolts and tighten these bolts firmly.
・ Be sure to use the attached hexagonal socket headed bolts to secure
the lid of detector. Be sure to secure the lid with 6 bolts. The use of
bolts other than attached may cause loss of explosion proof
performance.
・ Take care not to put metal or foreign material into the detector when
installing the lid to the detector. Always remove any foreign material in
the detector because it may cause failure or loss of explosion-proof
performance.
・ Install the lid after confirming that the seal packing is not sticking out.
WARNING ！
(5)
Make grounding with E bolt located at the bottom of detector(this detector is a
flame-proof structure. It is required to make grounding).
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