CITIZEN MG0000 - Manual (Page 38)

Decompression Diving Warning
This alarm sounds for 3 seconds and the decompression stop
indicator (STOP) is displayed on the display when the no-
decompression limit time has been exceeded resulting in
decompression diving during the course of diving.
The display returns to the no-decompression diving display when
decompression stop is performed in accordance the decompression
stop instructions.
Exceed Maxmum Depth Warning
When the limit depth of 40 m (131 ft) for recreational diving is
surpassed during the course of diving, an exceed maximum depth
error occurs, the current depth flashes and the alarm sounds for 15
seconds. During diving at a depth greater than 40 m (131 ft), the
warning alarm sounds for 15 seconds every minute.
This warning function is canceled when the depth returns to 40 m
(131 ft) or less.
Permanent Error Warning
The instructed depth flashes and an alarm sounds continuously
when either of conditions 1 or 2 below are met. If hazardous diving
or ascending is continued while ignoring this warning, a permanent
error (ERROR) occurs:
1. When not ascending to the instructed depth and continuing to
dive at an excessively low depth (diving at which the instructed
decompression stop depth exceeds 9 m (30 ft).) even though
having been instructed to make a decompression stop
(Permanent Error Warning 1).
The warning stops when the diver begins to ascend immediately and the
decompression stop instructed depth reaches 9 m or less.
2. When having ascended to a depth 1 m (4 ft) or more less than the instructed depth after
having been instructed to make a decompression stop (Permanent Error Warning 2).
In this case, the warning is canceled when the diver returns to the instructed depth.
<Permanent Error>
If hazardous diving or ascending is continued even after the
permanent error warning function has been activated, a permanent
error results, "ERROR" appears on the display and the entire
display flashes.
When a permanent error has occurred, the next dive cannot be
made for 24 hours. (The water depth measurement function does
not operate for 24 hours. In addition, "ERROR" is displayed when
the watch is switched to the dive plan mode, and the no-
decompression limit time is not displayed.)
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