Despatch MIC1162 Hi-limit - Manual (Page 40)

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While the Hardware Definition Code is displayed, depressing the SCROLL key will
cause the display to change to:
nonE or r485 or rrES
OPtn OPtn OPtn
Where none indicates the absence of the communications option and the remote reset
option, r485 indicates the presence of the communications option, and rrES indicates
the presence of the remote reset option.
The code may be changed by pressing the UP and DOWN keys. The RESET key must
be pressed when the correct code is displayed.
NOTE:
It is essential that this code is changed whenever there is a change to the
instrument's hardware configuration (change of input/output type,
alarm/retransmit output added/removed etc.). The instrument's software
depends upon this code to ensure that the instrument operates correctly.
To exit from the Hardware Definition Code display, depress the DOWN and SCROLL
keys simultaneously.