H5AN
Safety Precautions
Setting of Operating Time
Time Setting Range
Note:
The decimal point is not shown in the digital display.
1.
Since the H5AN Timer is capable of reading the input data at any
time during normal operation, the set time can be changed during
power application. This feature sets back the output from the
timer by temporarily setting the longer time or quickens the output
by setting the shorter time. During normal operation, the set time
may be accidentally changed by touching a thumbwheel switch,
causing the timer to operate with a different set time. To prevent
this possibility, keep the front cover closed except when changing
the set time.
2.
When the set time is all zeroes (e.g., 000.0 s or 00 hrs 00 min),
there will be a momentary control output upon power application
which can be used to check normal output. When changing the
set time during normal operation, pay special attention not to alter
the set value to this state.
3.
Since the sexagesimal system is adopted, when a rated time of
99 min 59 s or 99 hrs 59 min is selected, any value set to 6 or
more (i.e. 6-9) in the order of x 10 s or x 10 min respectively will
be rated as 5. Some erroneous setting examples are shown
below.
Examples of Setting/Actual Operating Time
4.
When changing the set time while power is being supplied, an
inadequate push of the thumbwheel switches will display two
numbers in one digital display window, causing the operating time
to drift widely. Therefore, press the thumb-wheel switches surely.
Take particular care in the case when the other three digits are all
zero, since the improper setting of the fourth switch to create four
zeroes will cause a momentary output.
5.
When operating the built-in selector switches of the H5AN-4DM
Timer with a backup power supply function for memory
protection, it is necessary to reset (either externally or manually)
the timer at the time the power is applied.
Also when this type of timer is connected to a device (or
manually) this must also be done when power is applied for the
first time.
Note:
If the timer is not reset, it operates in accordance with the
previous specifications or with the factory set specifications.
Rated time
Setting range
99.99 s
0.01 to 99.99 s (see note)
999.9 s
0.1 to 999.9 s (see note)
9999 s
1 to 9999 s
99 min 59 s
1 s to 99 min 59 s
999.9 min
0.1 to 999.9 min (see note)
99 hrs 59 min
1 min to 99 hrs 59 min
999.9 hrs
0.1 to 999.9 hrs (see note)
9999 hrs
1 to 9999 hrs
(Possible Operating Time)
(Undesirable Setting)
5 min 30 s
59 s
99 min
59 min
99 hrs
00 h 00 min
(momentary
output)
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