Pahlen AUTODOS 5000 User manual

pH/chlorine monitor
for swimming pools
AUTODOS 5000

pH/chlorine regulator AUTODOS 5000 - 2005-01-21
Eng_Autodos5000.doc ver 3.2 - page 2
Register
Register ...................................................................................................................................................................... 2
1. Installation ............................................................................................................................................................ 3
1.1. Suggested Layout for Installation of AUTODOS 5000.............................................................................................. 3
1.2. Guide to Installation of an AUTODOS 5000 System................................................................................................. 4
1.3. Suggested Connections................................................................................................................................................ 5
2. Operation .............................................................................................................................................................. 6
2.1. Controls and Indicators................................................................................................................................................ 6
2.2. Text Messages ............................................................................................................................................................. 10
2.2.1. Run Time Texts ...................................................................................................................................... 10
2.2.2. Fault Texts .............................................................................................................................................. 10
2.3. Start-up Sequence ........................................................................................................................................................ 10
2.4. Description of on/off Dosing Control ......................................................................................................................... 11
2.4.1. Acid/Alkali Dosing (on/off) by pH Control........................................................................................... 11
2.4.2. Chlorine Dosing (on/off) by Chlorine Monitoring ................................................................................ 11
2.5. Description of Frequency Control Dosing with P-regulation..................................................................................... 12
2.5.1. Acid/Alkali Dosing (frequency) pH Control (P-regulation).................................................................. 12
2.5.2. Chlorine Dosing (frequency) by Chlorine Monitoring (P-regulation) .................................................. 12
2.6. Description of Frequency Control with PD-regulation............................................................................................... 13
2.6.1. Parameter Choice for PD-regulation...................................................................................................... 13
2.7. Dosing Control via Current Output............................................................................................................................. 13
2.8. Alarm High .................................................................................................................................................................. 14
2.9. Alarm Low................................................................................................................................................................... 14
2.10. Alarm and Flow Fault LED's .................................................................................................................................... 15
2.11. Reset .......................................................................................................................................................................... 15
2.12. Probe Check (display uncalibrated values) ............................................................................................................... 15
2.13. Set-up ......................................................................................................................................................................... 16
2.13.1. Change Opening Code for Code Level ................................................................................................ 16
2.13.2. Enter Selected Set-up Mode................................................................................................................. 16
2.13.3. Change Set-up Options ........................................................................................................................ 16
2.13.4. Common Set-up.................................................................................................................................... 17
2.13.5. Channel Specific Set-up (Free Chlorine)............................................................................................. 17
2.13.6. Channel Specific Set-up (Combined Chlorine) ................................................................................... 18
2.13.7. Channel Specific Set-up (pH- Acid/Alkali)......................................................................................... 18
3. Maintenance.......................................................................................................................................................... 19
3.1. Calibration ................................................................................................................................................................... 19
3.1.1. pH Calibration ........................................................................................................................................ 19
3.1.2. Free Chlorine Calibration (ProMinent chlorine electrode CLE 2.2) ..................................................... 20
3.1.3. Free Chlorine Calibration (ProMinent chlorine electrode 4-20mA CLE 3-mA-10ppm)...................... 21
3.1.4. Free Chlorine Calibration (PB-100 chlorine electrode)......................................................................... 22
3.1.5. Free Chlorine Calibration (Jesco chlorine electrode) ............................................................................ 23
3.1.6. Combined Chlorine Calibration (ProMinent chlorine electrode CTE 1-mA-10ppm) .......................... 24
3.2. Maintenance Schedule................................................................................................................................................. 25
3.2.1. Cleaning Electrodes................................................................................................................................ 25
3.2.2. Free Chlorine Cell Control..................................................................................................................... 25
3.2.3. Free Chlorine Cell Maintenance (Prominent)........................................................................................ 25
3.2.4. Chlorine Cell Maintenance (PB-100) .................................................................................................... 25
3.2.5. Chlorine Cell Maintenance (Jesco) ........................................................................................................ 25
4. General Description of Pool Water Cleaning..................................................................................................... 26
4.1. Wanted Regulation Result........................................................................................................................................... 27
4.2. pH Regulation.............................................................................................................................................................. 27
4.3. Measuring Free/Combined Chlorine........................................................................................................................... 28
4.4. Free Chlorine Regulation by Free Chlorine Measurement ......................................................................................... 28
4.5. Combined Chlorine Regulation................................................................................................................................... 28
5. General Description ............................................................................................................................................. 29
6. Box (Fibox Cardmaster PC21/18 CFC II).......................................................................................................... 31
7. Electrical Connections ......................................................................................................................................... 32
8. Factory Settings.................................................................................................................................................... 33
9. Fault Finding ........................................................................................................................................................ 35
10. Technical Data.................................................................................................................................................... 36
11. Program Versions............................................................................................................................................... 37
12. Disclaimer ........................................................................................................................................................... 37
13. AUTODOS 5000 PC Interface (optional) ......................................................................................................... 38
14. AUTODOS 5000 PLC Interface (optional) ...................................................................................................... 39

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1. Installation
1.1. Suggested Layout for Installation of AUTODOS 5000

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1.2. Guide to Installation of an AUTODOS 5000 System
Important points to note when installing an AUTODOS 5000 system.
Suitable component placement and connections are shown in the preceeding diagram.
Monitoring and dosing connections should be made according to the diagram.
The chlorine and acid/alkali injection points should be as far apart as possible to avoid any chemical interaction.
Both the control unit and the flow cell should be mounted in a vibration free and dry atmosphere. Suitable water flow
is found in the ‘Maintenance’ chapter.
Place the flow cell as near as possible to the monitoring point to avoid long reaction times. It is also advantageous if
the control unit is near to the flow cell to facilitate calibration.
The outlet from the flow cell should be free from pressure. Lead the outlet water to a drain or a pressure equalization
tank.
The dosing pumps should be controlled via the filter pump, electrically via a contactor.
A flow guard shall be used for preventing dosing in the event of no water flow in the flow cell.
The alarm relay is arranged to operate in a "fail safe" manner. Voltage is applied to the relay when no fault condition
exists and is disconnected if a fault condition occurs. This means that the relay may be used to indicate a power fail
condition. Electrical connections can be made as suggested in the following diagrams and should be carried out by a
qualified electrician.
When installing an AUTODOS 5000 with free chlorine electrode in swimming pools that have previously been
treated with organic chlorine (trichlor or dichlor), the pool water must be changed. This is because the cyanuric acid
content in the pool water, caused by the organic chlorine, results in an exceptionally high value of chlorine when
DPD1-testing, thus making a correct calibration impossible. The chlorine cells show the free chlorine value, whereas
a DPD1-test shows the free chlorine together with the cyanuric acid bound chlorine. Calibration shall be made with a
photometer.
Dosing relay is max. 1A.

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1.3. Suggested Connections
In the example below, connections for the three available regulation alternatives are shown.

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2. Operation
2.1. Controls and Indicators
This is a brief description of all functions and indicators.
Refer to the respective sections in this handbook for further information.
NORMAL DISPLAYS
Normally channel 1 displays free chlorine, channel 2 displays combined chlorine and channel 3 displays pH.
With start or set up or during error conditions short text messages may be displayed (refer to the 'text message'
section for further information).
CODE LEVELS
To avoid unintentional alterations and to prevent unauthorised personal from changing the settings, there are two
different code levels. In normal mode no settings or values can be altered, you can only RESET the alarms.
CODE LEVEL 1: Set values, alarm limits and regulation mode can be changed and calibration is possible.
CODE LEVEL 2: All available changes, including set-up are possible
If no codes are used, code level 2 is reached directly when the button ‘CODE’ is pressed.

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ENTER CODE LEVEL
CODE When the button 'CODE' is pressed down, the opening code can be entered by using the buttons ’0’
–’9’, ’RESET’ clears the display. If the entered code is the same as opening code 1, you will enter
code level 1and if the entered code is the same as opening code 2, you will enter code level 2 when
the button 'CODE' is released. This is indicated by LED ’CODE’, if the LED ’CODE’ is flashing
you are in code level 2 and if there is steady light, you are in code level 1. The opening code can be
altered in calibration mode, this is described in the calibration chapter. If you have forgotten the
code, it can be displayed during the startup sequence. If the button ’CODE’ is pressed during the
count-down time, the code for code level 2 is displayed. If no codes are used, code level 2 is reached
directly when the button ‘CODE’ is pressed.
VIEW/ALTER SET VALUES
SET
VALUE
When the button 'SET VALUE' is pressed down, the set values can be altered by using the buttons
'↓' or '↑' below the displays for the respective channels. At least code level 1 is required for alteration
of the values.
VIEW/ALTER ALARM LIMITS
ALARM
HIGH
When the button 'HIGH ALARM' is pressed down, the high alarm limits can be altered by using
the buttons '↓' or '↑' below the displays for the respective channels. At least code level 1 is required
for alteration of the values.
ALARM
LOW
When the button 'LOW ALARM' is pressed down, the low alarm limits can be altered by using the
buttons '↓' or '↑' below the displays for the respective channels. At least code level 1 is required for
alteration of the values.
OTHER DISPLAY
VIEW
UNCAL
The uncalibrated value for all electrodes can be shown by pressing the 'FUNCTION' and 'LOW
ALARM' buttons simultaneously.
VIEW
FLOW
GUARD
To display the current status of the flow guard input (’F-0’ = flow OFF, ’F-1’ = flow ON) , press the
'SET VALUE' and 'HIGH ALARM' buttons simultaneously. If no flow guard is selected, there
will be no display.
VIEW
VERSION
To display the current program version press the 'HIGH ALARM' and 'LOW ALARM' buttons
simultaneously.
VIEW
SERIAL
NUMBER
To display the factory programmed serial number, press the 'FUNCTION' and 'HIGH ALARM'
buttons simultaneously.

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DOSING MODE SELECTION
SELECT
FUNC.
When the button ’SELECT FUNCTION’ is pressed, the dosing mode switches between OFF-
AUTO-OFF-AUTO-OFF-......... Dosing can be deselected in set-up mode and if this is the case,
nothing happens when you press the button. To get manual dosing , press the buttons 'SELECT
FUNCTION' and 'SET VALUE' simultaneously. Manual dosing is deactivated by pressing the
button 'SELECT FUNCTION'. At least code level 1 is required for alteration.
OFF No dosing
AUTO Automatic dosing according to chosen parameters (normal selection)
DOS Continuos dosing (even when error but stops with dosing error)
OTHER BUTTONS
RESET Press to clear a current alarm condition. When this button is pressed a text is shown on the
appropriate channel to indicate the type of alarm, after 1 second the displayed alarm is acknowledged
and a new alarm displayed if there are any. When all alarms are acknowledged, the alarm relay is
always cleared and depending upon whether the fault condition(s) still exists, the alarm LED is
either cleared or goes over to a steady display. Active alarms are displayed while the 'RESET'
button is pressed.
CAL Use this button to enter the calibration mode. This button operates on a rotary basis selecting either
ACTIVE, ADJUST or OFF in turn.
↑ ↓ The arrow buttons are used for calibration or changing set values and alarm limits on all 3 channels.
If either of these buttons are held depressed for more than 1 second a 'fast stepping' mode is entered.

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LED’s (INDICATORS) FOR DOSING
OFF Dosing not active
AUTO Dosing with automatic control
DOS Dosing active
If not 'OFF' and not 'AUTO' then manual dosing is selected and if no dosing takes place, the dosing is deselected in
the set-up. It may also be off because of too long dosing time if this function is selected but in that case there will
also be an alarm.
If the pH value is outside its limits, there is an ’alarm’ on the chlorine regulation channels if chlorine dosing is active.
The chlorine dosing is stopped until the pH value is within its limits again. This is indicated by flashing AUTO
LED’s on the chlorine channels and alarm text ’PHF’.
LED’s (INDICATORS) FOR ALARM
LOW FLOW Insufficient water flow through the flow cell
ALARM High or low alarm, dosing alarm or flow alarm on the displaying channel
All alarms have a 5 second delay.
LED’s (INDICATORS) FOR CALIBRATION
ACTIVE Calibration mode entered. Possible to set chlorine zero calibration, pH7 and pH9 values
ADJUST Calibration mode entered. Possible to set chlorine calibration values
Note. If the 'ACTIVE' LED flashes then set up mode has been entered. Leave set up mode by stepping past the last
row until the 'ACTIVE' LED is cleared. Leaving set up mode automatically returns the unit to normal operation.
OTHER LED’s (INDICATORS)
CODE Indicates active code level 1 or active code level 2 (flashing)
STDBY Indicates input STDBY that stops alarm and dosing, alarm relay is activated at STDBY
⊗
⊗
⊗
⊗
⊗
⊗
⊗
⊗
⊗

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2.2. Text Messages
Under certain conditions channels 1, 2 and 3 can display the following text messages.
2.2.1. Run Time Texts
The following texts can occur during normal programme operation.
--- EEP Er1 During a first start or with a fault in the EEPROM. Reset returns to the basic program.
dEL SEC ### During start-up, ### is the remaining start delay in seconds.
2.2.2. Fault Texts
These are the texts that can be displayed during calibration or after an incorrect calibration.
EL1 Active electrode fault 1 (low calibration point < min).
EL2 Active electrode fault 2 (low calibration point > max).
EL3 Active electrode fault 3 (high calibration point < min).
EL4 Active electrode fault 4 (high calibration point > max).
noC Chlorine value too low, calibration not possible.
These are the texts (in priority order) that can be displayed when the 'RESET' button is pressed.
FLo Active flow alarm.
Lo Active low alarm.
Hi Active high alarm.
doS Dosing error
PHF Chlorine dosing stopp because of pH exceeding limits
SbY Standby
--- No uncleared fault.
2.3. Start-up Sequence
At start-up the AUTODOS 5000 displays the text ' dEL SEC 059, 'dEL SEC 058'..... showing the remaining start-up
delay in seconds. By pressing the 'RESET' button the start-up sequence may be bypassed. The start-up delay is
intended to prevent false alarms due to unstabilised measured values.

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2.4. Description of on/off Dosing Control
2.4.1. Acid/Alkali Dosing (on/off) by pH Control
The drawing below illustrates both acid and alkali dosing. AUTODOS 5000 uses acid or alkali dosing (selected in
setup-mode).
set value
alkali dosing
monitored valueacid dosing
Acid dosing:
If the pH exceeds the acid set value then acid dosing begins and continues until the pH is returned to the acid set
value.
Alkali dosing:
If the pH falls below the alkali set value then alkali dosing will commence and continue until the pH exceeds the
alkali set value.
2.4.2. Chlorine Dosing (on/off) by Chlorine Monitoring
set value
chlorine dosing off
monitored value
chlorine dosing on
As long as the monitored value exceeds the set value then chlorine dosing is inactive. If the chlorine level falls below
the set value then chlorine dosing commences and will continue until the chlorine level equals or exceeds the
monitored value.
The example above shows the action for regulation of free chlorine, where chemicals are added to get higher free
chlorine value. Regulation of combined chlorine works in the opposite manner, dosing is used for lowering the
combined chlorined value.

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2.5. Description of Frequency Control Dosing with P-regulation
P-regulation is obtained by setting the D-time = 0 (in set-up mode). When P-regulation is selected the frequency is
controlled only by the difference between the set value and the measured value. The examples below uses a
maximum pulse frequency of 100 pulses/min.
2.5.1. Acid/Alkali Dosing (frequency) pH Control (P-regulation)
The drawing below illustrates both acid and alkali dosing. AUTODOS 5000 uses acid or alkali dosing (selected in
setup-mode).
set value alkali
dosing ranges
set value acid
max. alkali dosing (100 pulses/min)
monitored valuemax. acid dosing
30 pulses/min
60 pulses/min
The dosing range is used to control the operation of the dosing relay whenever a difference occurs between the set
value and the monitored value. Dosing range is selected in set-up mode.
Acid dosing:
Referring to the above diagram it can be seen that acid dosing commences when the monitored value exceeds the
acid set value. Dosing is dependent upon the dosing range and the maximum dosing of 100 pulses/min will occur
whenever the monitored value is equal to or greater than the limit of the dosing range, and will be 0 pulses/min when
the monitored value equals the set value. Between these two limits the dosing will be proportional to the difference
between the monitored and the set value in the range 0 to 100 pulses/min.
Alkali dosing:
If the monitored value falls below the alkali set value then alkali dosing will commence until the pH value exceeds
the alkali set value. With alkali dosing the same principles as for acid dosing apply although in the opposite
direction.
2.5.2. Chlorine Dosing (frequency) by Chlorine Monitoring (P-regulation)
Chlorine dosing operates as follows. When the chlorine level falls below the set value dosing commences at the
lowest rate, and its rate increases if the chlorine level continues to drop. When the monitored value is equal to or less
than the dosing limit then dosing is at the maximum rate of 100 pulses/min. Between the set value and the dosing
limit the dosing rate will be proportional to the difference between the monitored and the set value in the range 0 to
100 pulses/min. Dosing range is selected in set-up mode.
Regulation of combined chlorine works in the opposite manner, dosing is used for lowering the combined chlorined
value.

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2.6. Description of Frequency Control with PD-regulation
PD-regulation is selected when the regulation is frequency controlled and the D-time > 0 seconds (selected in set-
up). PD-regulation implies that the frequency is controlled by the difference between the set value and the measured
value (P) and also by the speed of change in the difference (D).
The idea behind making a PD-regulator and not a PID-regulator, is because the system in itself has a large
integration factor (I). The D-part helps to smooth the result, especially in small pools, because the PD-regulator
changes the dosing as soon as a change in the value is detected and this makes the regulator faster.
Set values are viewed by pressing the 'SET VALUE' button. The displayed set values may be changed by pressing
the '↑'or '↓'buttons under the appropriate display while holding the 'SET VALUE' button depressed. If either of
these arrow buttons are held down for more than 1 second a 'fast stepping' mode is entered.
The other parameters needed for the PD-regulation are set in the set-up. The parameters are:
1. P-band The difference between measured value and set value needed for full output. A small P-value
makes the regulator react more for a given difference.
2. D-time Sets how much the regulator shall react for a given change of the measured value. A large D-value
gives a large reaction.
2.6.1. Parameter Choice for PD-regulation
A good approach for selection of PD-regulation parameters is to begin with a P-regulator, and adjust this to a
satisfactory result, and then start with a short D-time and increase this until a good regulation result is reached.
If the PD-regulator is too slow, it is advisable to reduce the P-band.
The delaytime between dosing and the measured effect of it shall be kept as short as possible. The shorter the
delaytime, the better the regulator works.
2.7. Dosing Control via Current Output
When dosing control via the current output is selected all set values and controls are used in the same manner as
when frequency control is used. The relay output still functions as in frequency control when current output
regulation is selected. Current output regulation is selected in the set-up.

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2.8. Alarm High
set value
high alarm limit
monitored value
alarm activated
A high alarm occurs whenever the monitored value of the appropriate channel exceeds the user determined limit.
2.9. Alarm Low
set value
low alarm limit
monitored value
alarm activated
A low alarm occurs if the monitored value of the appropriate channel is below the user determined limit.

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2.10. Alarm and Flow Fault LED's
A fault condition is indicated by a flashing 'ALARM' LED and the common alarm relay is also activated. Note that
the alarm relay is called during normal operation and is released (voltage free) if a fault condition occurs. After a
RESET the alarm relay is always reset (voltage applied) and the 'ALARM' LED is either cleared or goes over to a
steady display, depending upon whether or not the fault condition still exists.
Indications are made for low alarm, high alarm and flow faults.
Dosing is effected by the alarms as follows:
Flow stops all dosing (re-starts when flow is OK)
Low pH stops chlorine dosing (re-starts when the value is within its limit)
High pH stops chlorine dosing (re-starts when the value is within its limit)
Dos pH stops pH dosing (re-starts at RESET)
Dos chlorine stops chlorine dosing (re-starts at RESET)
Low free chlorine –
High free chlorine –
Low combined chlorine –
High combined chlorine –
All alarms have a 5 second delay time.
2.11. Reset
RESET of all alarms is made by pressing the 'RESET' button until the LED stops flashing. While the button is held
down text(s) will be shown - for alarms that were active at the time the button was pressed - on displays 1 to 3 with a
one second interval. When the button is released the non active cleared alarms will disappear and a second press on
the 'RESET' button will display the active cleared alarms.
2.12. Probe Check (display uncalibrated values)
The uncalibrated electrode values on all channels may be displayed by pressing the 'FUNCTION' and 'LOW
ALARM' buttons.

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2.13. Set-up
It is possible to enter the set-up only if code level 2 is active, and first you must also enter calibration mode. If you
try entering calibration mode without first enter code level 2, the display shows ’Cd-’.
Enter opening code for code level 2:
When the ’CODE’ button is held pressed, the opening code för code level 2 may be entered using the buttons ’0’ –
’9’. If the entered code is correct, you enter code level 2 when the ’CODE’ button is released. Active code level 2 is
indicated by a flashing diode ’CODE’. Even if the code function is not used, you need to press the ’CODE’ button to
enter code level 2.
2.13.1. Change Opening Code for Code Level
If you have forgotten the code, it can be displayed during the startup sequence. If the button ’CODE’ is pressed
during the count-down time, the code for code level 2 is displayed.
Code level 2 must be active if you are going to change the opening codes.
Enter opening code (code level 1):
When the ’CODE’ button is held pressed, the opening code för code level 1 may be entered using the buttons ’0’–
’9’. ’RESET’ clears the display. Up to 6 digits can be used in the opening code.
Enter opening code (code level 2):
When the ’CODE’ button is held pressed next time, the opening code för code level 2 may be entered using the
buttons ’0’–’9’. ’RESET’ clears the display. Up to 6 digits can be used in the opening code.
By pressing the button 'CODE' you can alter between the editing of codes for level 1 and 2 on a rotary basis.
2.13.2. Enter Selected Set-up Mode
Set-up mode is entered via calibration, first enter calibration by pressing the 'CAL' button until the 'ACTIVE' LED
lights. There are four set-up alternatives and the following button combinations are used for entering the selected set-
up mode:
11 + 15 (FUNCTION + RESET): Set-up options common for all channels
13 + 1(SET VALUE + SELECT FUNCTION channel 1): Set-up options for channel 1
13 + 4(SET VALUE + SELECT FUNCTION channel 2): Set-up options for channel 2
13 + 7(SET VALUE + SELECT FUNCTION channel 3): Set-up options for channel 3
As long as the buttons are held down, a text describing the set-up mode you have entered is displayed. When the
buttons are released, active set-up mode is indicated by a flashing diode ’ACTIVE’ and if one of the channel specific
set-up modes have been chosen, this is indicated by flashing diodes ’OFF’ and ’AUTO’ on the selected channel.
2.13.3. Change Set-up Options
All set-up option editing is essentially alike. All set-up modes consist of a number of rows and the row is altered by
pressing the '↓' or '↑' button below display 2. While the '↓' or '↑' button is pressed, display 3 shows the present row
number and display 2 shows the selected set-up type. When the buttons are released, display 2 shows a descriptional
text and display 3 shows an editable numerical value or a text. The set-up options are edited by pressing the '↓' or '↑'
button below display 3, with numeric values you decrease/increase the value and with text information you switch
between alternatives. The chosen set-up types (common, chlorine, acid, alkali) are indicated via one of the following
texts: ’SEt’, ’CCL’, ’FCL’, ’ACi’, ’bAS’.

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2.13.4. Common Set-up
You have pressed the buttons FUNCTION + RESET and entered the set-up common for all channels, indicated by
the text ’SEt UP’ and steady lit LED’s ’OFF’ and ’AUTO’. To exit the set-up, press ’CAL’ or step out from the last
row. The following alterations may be made in set-up common for all channels:
Row Text Setting Explanation
-01 FLo oFF/on Flow guard OFF/ON
-02 FcL Pb/Cur Electrode selection for free chlorine, PB-100/4-20mA
-03 C-P CCh/Prg Display 2 – Combined chlorine/programmed
-04 FCL non/PH- pH-compensate free chlorine
-05 PHd ACi/bAS Acid/Alkali dosing
-06 PC no/rES/Prg Type of PC access (no/only RESET/full programming)
-07 Sio 1-255 Modbus identification number
2.13.5. Channel Specific Set-up (Free Chlorine)
Press the buttons ’SET VALUE’ + ’SELECT FUNCTION’ for the free chlorine channel and you will enter the
free chlorine channel set-up, indicated by the text ’SEt FCL’ and flashing LED’s ’OFF’ and ’AUTO’ on the free
chlorine channel. To exit the set-up, press ’CAL’ or step out from the last row. The following alterations may be
made in channel specific set-up (Free Chlorine):
Row Text Setting Explanation
-01 dos oFF/ono/FrE/Cur Dosing type – no dosing/on-off/frequency/current output
-02 P 0.10-2.00 P-band
-03 d 000-100 D-time
-04 dF 010-180 Max. dosing frequency, strokes/min
-05 Ldt 000-060 (min) Long dosing time alarm, 0 = no alarm function
-06 oFt 000-600 (sec) Min. time OFF for relay, 0 = no function (on-off)
-07 ont 000-600 (sec) Min. time ON for relay, 0 = no function (on-off)
-08 Cur --0/--4 Current output 0-20mA/4-20mA
-09 C-L 0.00-9.99 Value for 0/4mA
-10 C-H 0.00-9.99 Value for 20mA
The row is altered by pressing the '↓' or '↑' button below display 2. While the '↓' or '↑' button is pressed, display 3
shows the present row number and display 2 shows the selected set-up type (ex. ’FCL’ ’-01’). When the buttons are
released, display 2 shows a descriptional text and display 3 shows an editable numerical value or a text. The set-up
options are edited by pressing the '↓' or '↑' button below display 3, with numeric values you decrease/increase the
value and with text information you switch between alternatives.

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2.13.6. Channel Specific Set-up (Combined Chlorine)
Press the buttons ’SET VALUE’ + ’SELECT FUNCTION’ for the combined chlorine channel and you will enter
the combined chlorine channel set-up, indicated by the text ’SEt CCL’ and flashing LED’s ’OFF’ and ’AUTO’ on
the combined chlorine channel. To exit the set-up, press ’CAL’ or step out from the last row. The following
alterations may be made in channel specific set-up (Combined Chlorine):
Row Text Setting Explanation
-01 dos oFF/ono/FrE/Cur Dosing type – no dosing/on-off/frequency/current output
-02 P 0.10-2.00 P-band
-03 d 000-100 D-time
-04 dF 010-180 Max. dosing frequency, strokes/min
-05 Ldt 000-060 (min) Long dosing time alarm, 0 = no alarm function
-06 oFt 000-600 (sec) Min. time OFF for relay, 0 = no function (on-off)
-07 ont 000-600 (sec) Min. time ON for relay, 0 = no function (on-off)
-08 Cur --0/--4 Current output 0-20mA/4-20mA
-09 C-L 0.00-9.99 Value for 0/4mA
-10 C-H 0.00-9.99 Value for 20mA
The row is altered by pressing the '↓' or '↑' button below display 2. While the '↓' or '↑' button is pressed, display 3
shows the present row number and display 2 shows the selected set-up type (ex. ’CCL’ ’-01’). When the buttons are
released, display 2 shows a descriptional text and display 3 shows an editable numerical value or a text. The set-up
options are edited by pressing the '↓' or '↑' button below display 3, with numeric values you decrease/increase the
value and with text information you switch between alternatives.
2.13.7. Channel Specific Set-up (pH- Acid/Alkali)
Press the buttons ’SET VALUE’ + ’SELECT FUNCTION’ for the pH channel and you will enter the pH channel
set-up, indicated by the text ’SEt ACi’ or ’SEt bAS’ and flashing LED’s ’OFF’ and ’AUTO’ on the pH channel. To
exit the set-up, press ’CAL’ or step out from the last row. The following alterations may be made in channel specific
set-up (pH):
Row Text Setting Explanation
-01 dos oFF/ono/FrE/Cur Dosing type – no dosing/on-off/frequency/current output
-02 P 0.10-2.00 P-band
-03 d 000-100 D-time
-04 dF 010-180 Max. dosing frequency, strokes/min
-05 Ldt 000-060 (min) Long dosing time alarm, 0 = no alarm function
-06 oFt 000-600 (sec) Min. time OFF for relay, 0 = no function (on-off)
-07 ont 000-600 (sec) Min. time ON for relay, 0 = no function (on-off)
-08 Cur --0/--4 Current output 0-20mA/4-20mA
-09 C-L 0.00-9.99 Value for 0/4mA
-10 C-H 0.00-9.99 Value for 20mA
The row is altered by pressing the '↓' or '↑' button below display 2. While the '↓' or '↑' button is pressed, display 3
shows the present row number and display 2 shows the selected set-up type (ex. ’ACi’ ’-01’). When the buttons are
released, display 2 shows a descriptional text and display 3 shows an editable numerical value or a text. The set-up
options are edited by pressing the '↓' or '↑' button below display 3, with numeric values you decrease/increase the
value and with text information you switch between alternatives.

pH/chlorine regulator AUTODOS 5000 - 2005-01-21
Eng_Autodos5000.doc ver 3.2 - page 19
3. Maintenance
3.1. Calibration
Calibration may only be entered if at least code level 1 is active, indicated by LED ’CODE’.
During calibration no other adjustments may be made (other than by entering the set up mode) and all alarm tests are
halted. Automatic dosing is also suspended and the signal outputs are frozen.
During calibration, display 2 shows TOTAL chlorine (free + combined).
CALIBRATION ACTIVE is entered by holding down the 'CAL' button until the 'ACTIVE' LED lights. While the
calibration button is pressed the displays show ’CAL’.
CALIBRATION ADJUST is entered from CALIBRATION ACTIVE by pressing the 'CAL' button until the
'ADJUST' LED is lit. No pH value is shown on display 3, instead it shows ’---’ to indicate that no pH calibration is
possible.
LEAVE CALIBRATION by pressing the 'CAL' button until the 'ADJUST' LED is cleared.
3.1.1. pH Calibration
Two point calibration at values pH 7 and pH 9.
1. Enter calibration 'ACTIVE' as described in previous chapter. The 'ACTIVE' LED should light.
2. Take the newly cleaned and rinsed pH electrode and place it in the reference solution for pH 7 (use a separate
container, never the supply container), lightly agitate the electrode to ensure a good reading and allow the
measured value to stabilise (5-30 seconds.). Now depress the calibration button 'pH7' and hold it depressed until
the display shows '---'..
3. Rinse the electrode and repeat the procedure in section 2 but this time using buffer solution pH 9 and pressing
the button 'pH9' to obtain the display '---'.
4. Replace the electrode in the flow cell and pH calibration is now complete. Leave pH calibration, by pressing the
'CAL' button until the 'ACTIVE' LED is cleared.
5. Dispose of the used buffer solution.
Note. If the electrode signal differs significantly from the expected values an electrode fault will be indicated by text
display 'EL1', 'EL2', 'EL3' or 'EL4'. The AUTODOS 5000 will continue to use the calibration values from the last
successful calibration and the electrode fault will be automatically reset about one second after releasing the
calibration button.

pH/chlorine regulator AUTODOS 5000 - 2005-01-21
Eng_Autodos5000.doc ver 3.2 - page 20
3.1.2. Free Chlorine Calibration (ProMinent chlorine electrode CLE 2.2)
Two point calibration (zero point and gain) against a photometer measured value (ex. DPD no.1).
Gain calibration should be carried out weekly, zero point calibration less often. If the zero point calibration is not to
be performed then ignore item 2 below (but pay attention to correct water flow!).
1. Enter calibration by pressing the 'CAL' button until the 'ACTIVE' LED lights.
2. For zero point calibration detach the measuring cable from the electrode. Wait one minute and then press the
button '↓' below display 1, zero point calibration is now complete. Before any further calibration can take place
the cable must be reconnected to the electrode and the electrode allowed to monitor in the metering cell for at
least 5 minutes. This is to ensure a reliable reading for the next calibration.
3. Enter calibration ADJUST by pressing the 'CAL' button until the 'ADJUST' LED lights. The latest correct
electrode signal is now stored.
4. Take a water sample and ascertain the correct chlorine value.
5. Set the correct chlorine value on display 1 by means of the '↓' or '↑' buttons.
6. Leave calibration by pressing the 'CAL' button until the 'ADJUST' LED is cleared.
Note. If the electrode signal differs significantly from the expected values an electrode fault will be indicated by text
display 'EL1' or 'EL2'. The AUTODOS 5000 will continue to use the calibration values from the last successful
calibration and the electrode fault will be automatically reset about one second after releasing the calibration button.
Chlorine value may be calibrated down to a lower limit of 0.05 ppm.