Dear devotee, You can find the Durga Kavach at the following site.
Further visit the following site for little more elaborate meanings., an extract of which is given hereunder.
These hymns of Devi Mahatmyam embodies Mantras and there is a procedure for its recitation. There are three hymns: "the Argala Stotram, Keelaka Stotram and the Kavacham", which are to be chanted before reciting the Devi Mahatmyam. 'Argalam' enables to prevent obstructions. 'Keelakam' is chanted for removing impediments while undertaking this worship. 'Kavacham' is recited to protect the devotee like a shield from all dangers.
Every Mantra is full of inner significance. And every Mantra is repeated by devotees for some purpose or the other. Especially, the Devi-Mahatmyam is recited for averting calamities in life. Catastrophies, calamities and tensions, whatever they be, all these are averted by a regular daily recital of the Devi-Mahatmiyam.
Whatever information I could gather, I tried to present here for your benefit.
If I fall short of more information, I may please be pardoned.
Ideal time is when the body and mind are fresh. In Hindu dharma, akala pooja time is from 12.00 p.m. to 04.30 p.m. and during Rahukalam, yamagndam etc. people try not to start the pooja, but can continue if started earlier.
Tremondous benefits accrue by reading the Kavach not only to self but to the entire universe as after every pooja the sloka "Loka Samastham Sukhino Bhavanthu" is chanted. Loka includes all pranis and nature, not just living beings.
(Rated by 4 Council Members)