Instructions / Assembly
47
PROGRAMMING
T-SERIES
ON OFF
TRIGGER POINT
LOW VPD
1.8kPa
HIGH VPDLOW VPD
0
kPa
9.9
kPa
VPD MODE (LOW VPD TRIGGER)
Pressing the up or down button sets the low VPD 
trigger. The devices will activate if the probe’s reading 
meets or falls below this threshold. 
Once triggered, the devices will gradually ramp up to 
the level set in ON mode. If the probe’s reading falls 
below this trigger point, the devices will gradually slow 
down to a stop or at the level set in OFF mode.
You may set this trigger below the low VPD trigger to create a specific range in which the devices 
are active.
Either of the two trigger points can activate while you are in VPD Mode, even if you are viewing another trigger point. 
Set a trigger point to OFF if not in use, by holding down the up and down button. If there is a level set in OFF Mode 
other than zero the devices will run at that level when triggered to turn o.










