10
Controller hints
The controller can display hints that help the grower in assessing the effi-
ciency of his climate control set-up.
1- To view the Hint codes depress, repeatedly if
necessary, the MODIFY key until the DIFFERENTIAL
light turns ON.
2- Choose which sensor hint codes you desire by
depressing the SENSOR SELECT key (Temp or RH).
3- Use the UP and DOWN keys to toggles between
hint codes.
Note : The hint codes will only be available after 4full control cycles, (watch
for the blinking rightmost dot on the display).
Write them down and check in the next table. More information to properly
analyze performance is available on the following web site www.igrowing.ca
(October 2002) .
Hint # Description of TEMP hint codes
H-01 TEMP output is ON from 0 to 19 % of the time
H-02 TEMP output is ON from 20 to 39 % of the time
H-03 TEMP output is ON from 40 to 59 % of the time
H-04 TEMP output is ON from 60 to 79 % of the time
H-05 TEMP output is ON from 80 to 100 % of the time
H-06 Current ON-time for TEMP output is at least 4times the average ON-time
H-11 Total differential is between 2.0 C and 2.9 C (3.8 F and 5.2 F)
H-12 Total differential is between 3.0 C and 4.4 C (5.6 F and 7.9 F)
H-13 Total differential is between 4.5 C and 5.9 C (8.0 F and 10.6 F)
H-14 Total differential is between 6.0 C and 7.4 C (10.7 F and 13.3 F)
H-15 Total differential is between 7.5 C and 8.9 C (13.4 F and 16.0 F)
H-16 Total differential is 9C and up (16.1 F and up)
Note : The total differential equals the Dynamic Differential plus 1C/2F.
Hint # Description of RH hint codes
H-21 RH output is ON from 0 to 19 % of the time
H-22 RH output is ON from 20 to 39 % of the time
H-23 RH output is ON from 40 to 59 % of the time
H-24 RH output is ON from 60 to 79 % of the time
H-25 RH output is ON from 80 to 100 % of the time
H-26 Current ON-time for RH output is at least 4 times the average ON-time
H-31 Total differential is 5% or better
H-32 Total differential is between 6% and 8%
H-33 Total differential is between 9% and 11 %
H-34 Total differential is between 12 % and 14 %
H-35 Total differential is between 15 % and 17 %
H-36 Total differential is 18 % and up
Note : The total differential equals the Dynamic Differential plus 1%.
Mixed Temperature and Humidity Control Sequence
Cooling and dehumidifying is often performed simultaneously by the same
venting equipment. You can select this combined mode by setting one of the
following Control Mode numbers for Output 1:
1-61 Day Cooling and Dehumidifying
1-62 Night Cooling and Dehumidifying
1-63 24 H Cooling and Dehumidifying
When any Cooling and Dehumidifying mode is used, the Output 1will activate
the equipment as soon as the temperature is above the temperature setpoint
OR the humidity is above the humidity setpoint. However, the Output 1will not
be deactivated until both conditions have been reached, that is, until the tem-
perature and the humidity are below their respective setpoint.
When using any of these 3modes, take note that the Output 2will then be
forced to operate independently of the Output 1, thus forcing its Control Mode
number to either 2-04, 2-14, 2-24, 2-34, 2-44 or 2-54. For instance, if Output 2
Control Mode number prior to change was 2-22, then the forced mode will be
2-24 ; or if it was 2-41, it will be forced to 2-44 : in short only the last digit will
be forced to 4. Refer to pages 13 and 14 of the User manual to see the com-
plete list of the available Control Mode numbers.
Also take note that the humidity setpoint will be the same for Output 1and
Output 2. For instance, if you want to perform a 2-stage 24-hour Dehumidifying
setup, you must connect one fan in each output and set your Output 1to mode
1-63 (Cooling and Dehumidifying 24 H) and Output 2to mode 2-54
(Dehumidifying 24 H). Then, only Output 1fan will be on when it s too hot, and
both fans will be on when it s too humid.
In a second example, you may need to connect a fan in Output 1and a humidi-
fier in Output 2. By selecting the operating modes 1-63 (Cooling and
Dehumidifying 24 H) and 2-24 (Humidifying 24 H), the iGS-110 will activate the
fan when it s too hot or too humid. However, if you reach a condition where it s
too hot and too dry, the Output 1fan will take care to cool the room, while
Output 2will take care to humidify it.
Dynamic Differential
The iGS-110 controller performs its duties according to a special dynamic differen-
tial adjustment algorithm.
The controller will automatically adjust the operational differential when the Temp
levels overshoot or undershoot the desired setpoint level (or night setpoint during
the night). This dynamic algorithm adjusts the working parameters of the controller
to the reality found in your grow room. It can vary between 1C and 10 C/2F and
18 F (actually the maximum Dynamic Differential will be the biggest value between
20% of the setpoint or 10 C/18 F). The controller will always aim at not climbing
higher than the used setpoint addedwith a 1C/2F. In the case of cooling, the 1
C/2F will be substracted to the setpoint. When controlling temperature levels, the
controller will apply the same algorithm. In this case, the Dynamic Differential will
vary between 3and 20% over the entire Relative Humidity range (0-100%).
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If the controller is set to heat the room at 20 C, the Dynamic
Differential will modify itself until the control sequence never over-
shoots 21 C when heating and undershoots 19 C when cooling.