Vaisala HMP230 - Manual (Page 143)

HMP230 SERIES
M210225en-B Appendix 7: Alarm output unit
137
Setting and activating the outputs with menu commands
• Select MORE in the main menu and then ALARM; the following is
displayed:
• If the settings need to be changed, press CL:
- the quantity starts blinking; it can be changed with arrow switches,
and acknowledged with ENT.
- the third parameter (in this example HI ON) starts blinking. This
parameter determines whether the alarm output is in use or not, and
when it is activated. The selection is acknowledged with ENT.
The options are the following:
- HI ON (the alarm is activated by exceeding the setpoint, the
output is in use)
- LO ON (the alarm is activated if the value goes below the
setpoint, the output is in use)
- HI OFF (the alarm is activated by exceeding the setpoint, the
output is not in use)
- LO OFF (the alarm is activated if the value goes below the
setpoint, the output is not in use)
- the setpoint starts blinking (in this example, -20.00); if you wish to
change it, press CL and enter the new setpoint
- the hysteresis value starts blinking (in this example, 5.00); if you
wish to change it, press CL and enter the new value
NOTE
The options HI OFF and LO OFF are used to deactivate
the relay outputs e.g. for service purposes.
The settings of the channel 2 are changed in the same way.
Setting and activating the outputs using an RS line
ALARM <cr>
or
ALARM n ON <cr>
where n = channel number (1 or 2)