T
o enter Alarm set mode
, press the
MAX/MIN
and
UNIT
buttons at
the same time while in
RH, MOIST INT
or
MOIST EXT
mode. Doing so
will display the current value of the selected parameter’s high
setpoint and cause the word
HIGH
to appear near the upper left of
the display, as shown on the left.
All three parameters require you to use the same three-step
sequence of button presses for changing their setpoint(s). After
entering Alarm set mode (with
HIGH
appearing on screen), you can either raise or lower the
HIGH
setpoint by using the
UP>
or
<DN
button, or leave it unchanged (if you wish to change only the
LOW
setpoint). Each press of the
UP>
button increases the setpoint by 0.1%. Each press of the
<DN
button decreases the setpoint by 0.1%. To change the value of the setpoint by a large
amount, you can press and hold the
UP>
or
<DN
button for at least 3 seconds.
Whether or not you change the
HIGH
setpoint, you must press the
STORE/ENTER
button to
proceed to the next step in the sequence: changing the
LOW
setpoint or leaving it unchanged.
Pressing the
STORE/ENTER
button with
HIGH
on-screen saves the value shown on the primary
readout as the selected parameter’s new
HIGH
setpoint. It also changes
HIGH
to
LOW
and
switches the primary readout to show the current value of the parameter’s
LOW
setpoint.
Once
LOW
appears on-screen, you can use the
UP>
or
<DN
button to change the value of the
parameter’s
LOW
setpoint, as explained earlier in the paragraph on
HIGH
setpoints. Alternatively,
you can leave the
LOW
setpoint unchanged. Whether or not you make a change, your next step
must be to press the
STORE/ENTER
button. Doing so saves the value shown on the primary
readout as the selected parameter’s new
LOW
setpoint. It also causes
LOW
to disappear and
returns the RH650 to operation in real-time RH measurement mode.
To disarm any of the six alarms
(
HIGH
and
LOW
for
RH, MOIST INT
and
MOIST EXT
), you must
reset its setpoint to 100.0% or 0.0% by pressing the
UP>
or
<DN
button. When disarming a
HIGH
alarm, it is faster to use the
UP>
button to increase its setpoint to 100% than to use the
<DN
button to decrease its setpoint to 0.0%. In practice, what you would do is: 1) press and hold the
UP>
button until the display shows a value greater than 99%, 2) release the button, and 3) use
brief presses to reach 99.9%. When the primary readout shows 99.9%, the next press of the
UP>
button will change the readout to
OFF
. Pressing the
STORE/ENTER
button at this point will disarm
the
HIGH
alarm for that parameter.
Similarly, you would disarm a
LOW
alarm by 1) pressing and holding the
<DN
button until the
display shows a value less than 1%, 2) releasing the button, and 3) using brief presses to reach
0.1%. When the primary readout shows 0.1%, the next press of the
<DN
button will change the readout to
OFF
. Pressing the
STORE/ENTER
button at this point will disarm the
LOW
alarm for that
parameter. The screen at left shows the next-to-last step (prior to
pressing the
STORE/ENTER
button) of disarming the
LOW
alarm for
MOIST INT
.
10
