Autopilot APCEPH1 사용 설명서 - 페이지 4
{카테고리_이름} Autopilot APCEPH1에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Autopilot APCEPH1 13 페이지. Ph controller
페이지 인쇄INSTRUCTION MANUAL
How it worKs
Although the APCEPH1 may seem
complicated, the basic operation of the
unit is actually quite simple. The example
below describes the operation of the
APCEPH1 being used to lower the pH of a
water tank / reservoir or aquarium.
Let's assume that the user has selected pH
down control with the following settings:
pH = 6.0
dosing time = 10 seconds
mixing time = 2 minutes
pH deadband = 0.2
pH up or Down = Down
The pH sensor probe constantly measures
the pH of the water to be controlled. In
this example, when the pH levels rises
beyond 6.0 ph, the unit will activate the
dosing pump for 10 seconds.
After the dosing pump stops, the mixing
timer will start to count down for 2
minutes. The mixing timer is important to
allow sufficient time for the pH adjustment
acid to completely mix into the water.
During the mixing time, the unit is waiting
for the water to react to the addition of
the pH adjustment liquid.
By adding only a small amount of pH
adjustment each dosing "cycle", the pH
level can be lowered slowly to the desired
level. If too much pH adjustment is added
to the water or if the mixing timer is set
pH stock adjustment
liquid reservoir
*Provided by user
The "sample" pump will constantly operate
to provide a sample of the current nutrient.
The sample pump will also mix and aerate
the nutrient.
4
Chemical
tubing
Hydroponic nutrient
reservoir
*Provided by user
too low, the pH level could "over-shoot"
the desired pH level.
Once the mixing timer counts down to
zero, the unit will again measure the pH
level and determine if another dose is
required (this is where the deadband
setting works).
In this example, the pH deadband is set
at 0.2 pH. So if the pH sensor detects that
the level has dropped from 6.0 to 5.8 or
below, no other doses are required and the
controller will not activate another dosing
cycle. If the unit measures the pH to still be
above 5.8 pH, additional pH dosing cycle(s)
will continue to occur until the pH level
goes down below the pH setting MINUS
the deadband setting. (The deadband
setting works just the opposite when
raising the pH level... pH setting PLUS the
deadband).
By adding pH adjustment slowly in small
amounts, the pH level will gradually go
down to the desired level without "over-
shooting" the pH setpoint.
Ideally, the user should start with a low
setting for the dose time and a high setting
for the mixing time to allow plenty of time
for the pH adjustment to stabilize.
If the user has a large quantity of water to
be controlled, the dosing and mixing timer
settings may need to be increased. Smaller
quantities of water can use lower dosing
and mixing times.
Peristaltic
pump
pH
sensor
SAM-1
www.hydrofarm.com
APCEPH1
D1-
PHC
Sensor
interface cable
Temp sensor
Sample pump
(operates 24 hours)