Omega RH650 User Manual page 12

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
10
To 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
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.