Delta OHM HD2817T Series, Manual

Page: 21 / 64

21
RELAY RL2
MODE
For. OFF T Temp.
*
RH Rel.
Tw wetp.
AH Abs.
MR Mix.
Td Dew For. ON
<ESC> exit/cancel
The current item is indicated by an asterisk (“RH Rel.” in the example): to change it,
use the
 
arrows to select the new item and press ENTER. The asterisk will indicate
your new selection. Press ESC to return to the previous menu.
You can associate the following quantities to the RL2 relay:
•
RH Rel. corresponds to relative humidity,
•
AH Abs. corresponds to absolute humidity,
•
MR Mix. corresponds to mixing ratio,
•
Td Dew. corresponds to dew point,
•
T Temp. corresponds to temperature ,
•
Tw Wetp. corresponds to the wet bulb temperature
•
For. OFF (Force OFF) blocks the relay in the OFF state.
•
For. ON (Force ON) blocks the relay in the ON state.
The last two items are useful during system maintenance and instrument
configuration.
Act above ( high threshold ) When the measurement increases, it represents the threshold ( set
value ) that shifts the relay from de-energised to energised when exceeded.
The contact to terminals 6 and 7 goes from closed to open. The contact to terminals 5
and 6 goes from open to closed.
The trigger threshold can be disabled, by setting the “
status = inactive ”.
RELE RL2
ACTIVE ABOVE
set value: 80.0%
status: active
<UP> <DOWN> change
<ESC> exit/cancel
To change the threshold value, press ENTER to select the
set value line and use the


arrows to set the desired value.
Press ENTER to go to the status line. Use the
 
arrows to select active in order to
enable the trigger threshold, inactive to disable it.
Act below ( low threshold ) When the measurement decreases, it represents the threshold that
shifts the relay from de-energised to energised when exceeded.
The contact to terminals 6 and 7 goes from closed to open. The contact to terminals 5
and 6 goes from open to closed.
The trigger threshold can be disabled, by setting the “
status = inactive ”.