Pulsafeeder PULSAblue 3300 Series, Руководство по установке и эксплуатации

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18
11.2 Manual Operation of the Relays
All four of the relays can be operated manually. To manually operate the relays:
Go to the
Process sc
reen. Press ―
ENT
‖.
You will be taken to a screen that looks like:
AUTO-MANUAL (5 MINS.)
(1)
BLOW
(2)
RLY2
(3)
RLY3
(4)
RLY4
Press 1-4; BACK=EXIT
PRESS 1-4; CL
EXIT
Press ―1-4 ― to manually change the state of that particular relay. If the relay is already on, pressing that
number will turn it off. A five-minute countdown timer will start. After five minutes has expired the relay
will return to automatic control. A relay that is in manual control will stay in manual control until the five
minutes expires even if this screen is exited. The five-minute timer helps to prevent damage to the
system if a relay is left in manual.
WARNING: Manual control overrides everything including the
flow switch input. Use care when operating relays manually with no flow in the system.
12 Calibration of Conductivity and ORP
12.1 Calibration of Conductivity
The conductivity requires periodic calibration. Calibration is usually required after cleaning the sensor.
Calibration should always be performed with the sensor in the piping assembly with good flow past the
sensor. It is necessary to have an accurate reading of the blowdown water to properly calibrate the
controller. A hand-held conductivity meter that tests the sample works well for this purpose. If a meter
that measures ppm is used, refer to the conductivity vs. ppm chart in section 12.3 and convert the ppm
to an approximate conductivity value. Buffers can be used to check calibrations but should not be used
for calibration purposes (see below).
The controller uses a single point calibration. A two point calibration is not necessary if using a
Pulsafeeder conductivity sensor.
Ensure that the controller is operating with good flow past the sensor.
Take a sample of the water and measure with a hand-held conductivity tester.
From the
PROCESS screen, press CAL to enter the calibration screen. Use the keypad to input
the conductivity reading from the hand-
held. Press ―
ENT
‖.
Take another hand-held sample to verify calibration.