Starting Up; Basic Setup Of The Measuring System; Calibration Of The Measuring System - Grundfos Conex DIA-1-A PA/HP Montage- Und Betriebsanleitung

10.4 Starting up

1. Check that all electrical connections are correct.
2. Check that the sample water lines have been connected
correctly.
3. Start up the sample-water supply.
– The minimum sample-water flow is approximately 30 l/h.
4. Switch on the power supply.
The measuring cells require a running-in period:
• peracetic acid measuring cell: about one hour
• hydrogen peroxide measuring cell: about
three hours.
Note
The first calibration cannot be carried out until this
running-in period is over!
Check the calibration after about one day, and repeat
the calibration, if necessary!

10.5 Basic setup of the measuring system

See the installation and operating instructions for the
® ®
Conex DIA-1 / Conex DIA-2Q!
Setup with the instrument amplifier and controller
® ®
Conex DIA-1 / Conex DIA-2Q:
1. In the "Setup" menu, select the line "Parameter" using the
[Up] and [Down] buttons, and press [OK] to switch to the
corresponding menu.
2. Select the line containing the value to be measured
(parameters peracetic acid or hydrogen peroxide) using the
[Up] and [Down] buttons.
3. Press [OK] to confirm the selection and return to the "Setup"
menu.
4. Select the line "Measuring ranges" using the [Up] and [Down]
buttons, and press [OK] to switch to the corresponding menu.
5. In the "Measuring ranges" menu, the following options are
available:
– 0-100 mg/l
– 0-500 mg/l
– 0-1000 mg/l
– 0-2000 mg/l
– Others: range freely adjustable.
6. Select the line containing the correct measuring range using
the [Up] and [Down] buttons.
7. Using the option "others", the operator can set the lower and
upper limit of the measuring range to any value within the
widest standard measuring range.
For further settings, see the installation and operating instructions
® ®
for the Conex DIA-1 / Conex

10.6 Calibration of the measuring system

Observe the installation and operating instructions for the
® ®
Conex DIA-1 / Conex DIA-2Q!
Calibration function of the instrument amplifier and
®
controller Conex DIA-1 / Conex
1. Press [Cal] to switch to the calibration menu.
– The LED next to [Cal] illuminates.
2. Depending on the set access rights, it may be necessary to
enter the four-digit code number using the [Up] and [Down]
buttons.
3. Press [OK] to switch to the "Per-acetic acid" or "Peroxide"
menu respectively.
12
DIA-2Q!
®
DIA-2Q
4. The following options are available:
– Cal. meas. value
– Cal result
– Cal. cycle.
Per-acetic acid
Cal. meas. value
Cal result
Cal. cycle
Calibration
1. Select the line "Cal. meas. value", and press [OK] to switch to
the corresponding menu.
2. In the bottom line, the entry field (value in mg/l) for the
reference value (determined analytically) and the actual cell
current (in µA) is displayed.
Per-acetic acid
150 mg/l
I-cell 120 µA
3. Enter the reference value using the [Up] and [Down] buttons,
and confirm using [OK].
4. Press [OK] to start calibration.
– An automatic reading function reads in the sensor data, and
the calibration is carried out.
– The slope (sensitivity) of the sensor is calculated.
5. Immediately after calibration, the result of the calibration is
shown automatically (first line for example "CALDATA
PERAC").
– The slope of the sensor in µA/ppm is displayed.
CALDATA PERAC
Slope
8.53 µA / ppm
Checking the calibration result and setting the
calibration cycle
1. Press [OK] to return to the "Per-acetic acid" or "Peroxide"
menu respectively. See above.
2. When selecting "Cal result" (after the calibration), the
computed slope of the sensor can be checked.
3. Selecting "Cal. cycle" in the "Measured value" menu starts a
countdown function. When the countdown interval, which can
be set to a value between 1 and 100 days, is over, the alarm
message "Calibrate sensor" is triggered.