Knick Stratos Pro A4 CC Series User manual

T
he Art o
f
Measuring
.
Stratos Pro A2.. CC / A4.. CC
Dual Conductivity
Measurement
Quickstart
Kurzübersicht............... 18
Guide rapide ................ 33
Inicio rápido ................. 48
Início rápido ................. 63
Quickstart Guide............3
Guida rapida................. 78
Latest Product Information: www.knick.de

2
HART: Typical Applications
8
9
17
+ out
- out 1
- out 2
A2...
4 ... 20mA
HART Terminal
8
9
17
+ out
- out 1
- out 2
+
-
Power supply
A2...
Uout
min 19V
250 Ohm
4 ... 20mA
HART Terminal
1
2
WG 21 5
6
HART Terminal

3
Quickstart
Measuring Mode
After the operating voltage has been connected, the analyzer auto-
matically goes to“Measuring“ mode. To call the measuring mode from
another operating mode (e.g. Diagnostics, Service):
Hold meas key depressed (> 2 s).
Sensoface indicator
(sensor status)
Time (or ow)
Mode indicator
(measuring)
Hold meas key
depressed for calling
the measuring mode
(pressing once more
switches the display)
Depending on the conguration, one of the following displays can be
set as standard display for the measuring mode (see page 6):
• Measured values channel A and channel B as well as time
(default setting)
Measured value and tag number (“TAG”)
• Conductivity and temperature of channel A (see example above)
• Conductivity and temperature of channel B
• Time and date
• Measured value channel A, channel B and ow
• Output currents
Note: By pressing the meas key in measuring mode
you can view the displays for approx. 60 sec.
You must congure the device for the respective measurement
task!
Display indicates
OUT1: e.g.
measured value
of channel A
Display indicates
OUT2: here,
temperature of
channel A
enter key
Display active
measuring
channel

4
Keypad
Key Function
meas • Return to last menu level
• Directly to measuring mode (press > 2 s)
• Measuring mode: other display
info • Retrieve information
• Show error messages
enter • Conguration: Conrm entries,
next conguration step
• Calibration:
Continue program ow
menu • Measuring mode: Call menu
Arrow keys
up / down • Menu: Increase/decrease a numeral • Menu: Selection
Arrow keys
left / right • Previous/next menu group • Number entry: Move between digits
Sensocheck, Sensoface sensor monitoring
Sensocheck continuously monitors the sensor and its wiring.
Sensocheck is user-dened (default: O).
Sensoface provides information on the sensor condition.
The three Sensoface indicators provide information on
required maintenance of the sensor.
When Sensoface is“sad”, the display turns purple.
Pressing the info key shows an information text.

5
Display
MEMO SENS
1234 567 891011
171819202122
12
13
14
15
16
23
24
Signal colors (display backlighting)
Red
Red blinking Alarm (in case of fault: display values blink) Input error: illegal value or wrong passcode
Orange HOLD mode (Calibration, Conguration, Service)
Turquoise Diagnostics
Green Info
Purple Sensoface message
1 Temperature
2 Sensocheck
3 Interval/response time
4 Sensor data
5 Not used
6 Limit message:
Limit 1 or Limit 2
7 Alarm
8 Service
9 Channel A / Channel B
10 Calibration
11 Not used
12 Waiting time running
13 Info available
14 Hold mode active
15 Main display
16 Secondary display
17 Proceed using enter
18 Not used
19 Diagnostics
20 Conguration mode
21 Calibration mode
22 Measuring mode
23 Sensoface
24 Unit symbols

6
Display in Measuring Mode
enter key
meas key
The MAIN DISPLAY is the display which
is shown in measuring mode. To call
the measuring mode from any other
mode, hold the meas key depressed
for at least 2 sec.
By pressing meas briey you can step
through further displays such as tag
number (TAG) or ow (L/h).
These displays are turquoise. After
60 sec they switch back to the main
display.
approx. 2 s
Press enter to select a display as
MAINDISPLAY.
The secondary display shows
“MAINDISPLAY – NO”.
Use the UP / DOWN arrows to select
“MAIN DISPLAY – YES”
and conrm by pressing enter.
The display color changes to
white. This display is now shown in
measuring mode.
Example:
Display of conductivity 1 and 2
and calculated pH value.
Conductivity 1
Conductivity 2
Calculated pH

7
Selecting the Mode / EnteringValues
To enter a value:
5)Select numeral: left / right arrow key
6)Change numeral: up / down arrow key
7)Conrm entry by pressing enter
To select the operating mode:
1)Hold meas key depressed (> 2 s) (measuring mode)
2)Press menu key: the selection menu appears
3)Select operating mode using left / right arrow key
4)Press enter to conrm the selected mode
Selection menu
Selected mode
(blinks)
1
4
3
2
57
6

8
Display of calibration data
Self test: RAM, ROM, EEPROM, module
Logbook: 100 events with date and time
Display of direct, uncorrected sensor signals
Display of software version, model designation, serial no.
Manual activation of HOLD mode, e.g., for sensor replacement.
The signal outputs behave as configured (e.g., last measured value, 21 mA)
Display of measured values for validation (simulators)
Resetting the ion exchanger (after replacement)
Current source, output 1
Current source, output 2
Device type selection (process variable)
Specifying access codes for operating modes
Reset to factory setting
Enabling an option via TAN




(Access via
code, factory
setting:
5555)
Configuration
Calibrating sensor A by input of cell factor
Calibrating sensor B by input of cell factor
Operating Modes / Functions
Pressing the menu key (down arrow) opens the selection menu.
Select the menu group using the left/right arrow keys.
Pressing enter opens a menu item. Press meas to return.

TAG display (if configured)
after 60 s after 60 s
CLK display
Meas. mode
(main display
selectable)

9
Overview of Configuration
The conguration steps are assigned to dierent menu groups.
Using and you can jump between the individual menu groups.
Each menu group contains menu items for setting the parameters.
Pressing enter opens a menu item.
Use and to edit a value. Press enter to conrm/save the settings.
To return to measurement: Hold meas key depressed (> 2 s).








Select
menu group Menu group Code Display Select menu item
Sensor A parameters S_A:
Menu item 1
...
Menu item ...
Sensor B parameters S_B:
Measuring mode MES:
Current output 1 OT1:
Current output 2 OT2:
Control input
(flow measurement or
level) IN:
Alarm mode ALA:
Stratos Pro A4... only:
Relay outputs REL:
Setting the clock CLK:
Tag number TAG:


10
Setup and Channel Selection on the Device
Sensors A and B – Arrangement
Device type:
Cond-Cond
Display
OUT 2
Display
OUT 1
DISPLAY:
Channel Selection and Display Assignment
Outlet:
COND B sensor
with fitting
Inlet:
COND A sensor
with fitting
Connection length
max. 3 m
Cation exchanger

11
pH Value Calculation
Calculating the pHValue by Means of Dual Conductivity
Measurement
When monitoring boiler feedwater in power plants, dual conductivity
measurement can be used to calculate the pH value. For that purpose,
the boiler feedwater conductance is measured before and after the
cation exchanger. This commonly used method of indirect pH value
measurement does not require much maintenance and has the fol-
lowing advantage:
Normal pH measurement in ultrapure water is very critical. Boiler feed
water does not contain many ions. This requires the use of a special
electrode, which must be calibrated constantly and the service life of
which is generally rather short.
Function
Two sensors are used to measure the conductivity before and after
the cation exchanger. The pH value is inferred from these two conduc-
tivity values.
Cation
exchanger
Sensor A
TC: NH3/ NaOH
Sensor B
TC: HCl
pH
H2O
Cond measur-
ing point A
Cond measur-
ing point B
You can enter more parameters for calculating the consumption of
the ion exchanger (size, capacity, eciency). The remaining capacity
is displayed in the Diagnostics / Monitor menu. After replacement of
the ion exchanger an entry must be made in the SERVICE menu.

12
Calibration by Input of Cell Factor
You can directly enter the value for the cell factor of a sensor. This
value must be known, e.g. determined beforehand in the laboratory.
The selected process variable and the temperature are displayed.
Display Action Remark
Select Calibration.
Press enter to proceed.
Select
CAL_CELL_A
(or
(or CAL_CELL_B)
calibration method.
Press enter to proceed.
The calibration
procedure is identi-
cal for sensor A and
sensor B.
The selection (A or
B) is indicated in the
upper display line.
Ready for calibration.
Hourglass blinks. Display (3 sec) Now the device is in
HOLD mode.
Enter cell factor.
Press enter to proceed. The selected process variable and the
temperature are
displayed.
The device shows the
calculated cell factor (at
25 °C).
Sensoface is active.
Use the arrow keys to
select:
• MEAS (end)
• REPEAT
Press enter to proceed.
End:
HOLD is deactivated
after a short time.

13
HOLD Mode
The HOLD mode is a safety mode during conguration, calibration and
servicing. Output current is frozen (Last) or set to a xed value (Fix).
The HOLD mode is indicated by orange display backlighting.
Terminating the HOLD mode
The HOLD mode is ended by switching to measuring mode (hold
meas key depressed). The display reads“Good Bye“, after that, the
HOLD mode is exited.
When the calibration mode is exited, a conrmation prompt ensures
that the installation is ready for operation (e.g.: sensor reinstalled,
located in process).
HOLD mode, display icon:
HOLD active
21
4HOLD active
Output current
[mA] Output signal for HOLD FIX setting = 21.0 mA Output signal for HOLD LAST setting
Output signal during HOLD:
Output signal response
• Last: The output current is frozen at its last value. Recommended
for short conguration procedures. The process should not change
decisively during conguration. Changes are not noticed with this
setting!
• Fix: The output current is set to a value that is noticeably dierent
from the process value to signal the control system that the device
is being worked at.

14
Alarm
Manual activation of HOLD
The HOLD mode can be activated manually from the HOLD menu. This
allows checking or replacing a sensor, for example, without provoking
unintended reactions of outputs or contacts.
Press meas key to return to selection menu.
Alarm
When an error has occurred, Err xx is displayed immediately.
Only after expiry of a user-dened delay time will the alarm be
registered and entered in the logbook.
During an alarm the alarm contact opens. The display blinks and the
display backlighting turns red.
Error messages can also be signaled by a 22 mA output current.
2 sec after the failure event is corrected, the alarm status will be
deleted.
External activation of HOLD
The HOLD mode can be activated from outside by sending a signal to
the HOLD input (e.g. from the process control system).
Process control system
Power supply
12...24 V AC/DC
Stratos Pro
input
HOLD
HOLD inactive 0...2 V AC/DC
HOLD active 10...30 V AC/DC
10
11

15
Message Released by Cause
Alarm
(22 mA)
Alarm
contact
opens
Sensocheck Polarization / Cable
Error messages Flow (CONTROL input)
Flow (current input)
ERR A/ ERR B: conductance > 250,000 μS
ERR A/ ERR B: conductivity > 1,000 μS
HOLD HOLD HOLD via menu or input
(Last/Fix) CONF Conguration
CAL Calibration
SERVICE Service
Alarm and HOLD Messages
Power supply
12...24 V AC/DC
Stratos Pro
input
CONTROL
13
14
To generate a message via the CONTROL input:
Open the“Conguration“ menu to activate the message:
0(4) ... 20 mA:
Stratos Pro
input
Current
5
6
To generate a message via the current input:
Open the“Conguration“ menu to activate the message:

16
Error Messages
Error Info text (is displayed in case of fault
when the Info key is pressed)
Problem
Possible causes
ERR 95 SYSTEM ERROR System error
Restart required.
If error still persists, send in the
device for repair.
ERR 96 WRONG MODULE Wrong module
Please have the module replaced
at the factory.
ERR 97 NO MODULE INSTALLED Supply voltage too low
or no module installed
ERR 98 CONFIGURATION ERROR Error in conguration or
calibration data
Memory error in device program
Configuration or calibration data
defective; completely reconfig-
ure and recalibrate the device.
ERR 99 DEVICE FAILURE Error in factory settings
EEPROM or RAM defective
This error message only occurs
in the case of a total defect. The
device must be repaired and
recalibrated at the factory.
ERR 100 INVALID SPAN OUT1 Span Out1 configuration error
ERR 101 INVALID SPAN OUT2 Span Out2 configuration error
ERR 105 INVALID SPAN I-INPUT I-Input configuration error
ERR 106 INVALID CHANNEL SELECTION
Configuration error
ERR 108 OUT1 INVALID CORNER X/Y OUT1 bilinear,
wrong characteristic
ERR 109 OUT2 INVALID CORNER X/Y OUT2 bilinear,
wrong characteristic
ERR 110 CATION EXCHANGER CAPACITY Capacity of ion exchanger used
up – replace

17
Error Messages
Error
Info text
(is displayed in case of
fault when the Info key is
pressed)
Problem
Possible causes
ERR 10
(channel A)
ERR 40
(channel B)
CONDUCTANCE TOO HIGH Conductance value
out of range: > 250 mS
ERR 11
(channel A)
ERR 41
(channel B)
CONDUCTIVITY RANGE Display range violation
Cond > 9999 μS/cm
< 0.1 kohm cm
ERR 13
(channel A)
ERR 43
(channel B)
TEMPERATURE RANGE Temperature range
violation
ERR 15
(channel A)
ERR 45
(channel B)
SENSOCHECK Sensocheck
Check cable
ERR 59 INVALID CALCULATION pH value cannot be calcu-
lated. Dierence between
the measured conductivity
values value is too large.
ERR 60 OUTPUT LOAD Load error
ERR 61 OUTPUT 1TOO LOW Output current 1 < 3.8 mA
ERR 62 OUTPUT 1TOO HIGH Output current 1 > 20.5 mA
ERR 63 OUTPUT 2TOO LOW Output current 2 < 3.8 mA
ERR 64 OUTPUT 2TOO HIGH Output current 2 > 20.5 mA
ERR 71 I-INPUT Current input limit value
ERR 72 FLOW TOO LOW Flow too low
ERR 73 FLOW TOO HIGH Flow too high

18
Quickstart
Betriebsart Messen
Nach Zuschalten der Betriebsspannung geht das Gerät automatisch
in die Betriebsart„Messen“. Aufruf der Betriebsart Messen aus einer
anderen Betriebsart heraus (z.B. Diagnose, Service): Taste meas lang
drücken (> 2 s).
Sensoface-Anzeige
(Sensorzustand)
Uhrzeit (oder
Durchuss)
Betriebsart-Anzeige
(Messen)
Taste meas
langdrücken:
Aufruf Betriebsart
Messen
(erneutes, kurzes
Drücken: Wechsel der
Displaydarstellung)
Anzeige aktiver
Messkanal
Je nach Konguration können Sie folgende Anzeigen als Standard-
Display für die Betriebsart„Messen“ einstellen (siehe Seite 21):
• Messwerte Kanal A und Kanal B sowie Uhrzeit (Voreinstellung)
Messwert und Messstellenbezeichnung („TAG“)
• Leitfähigkeit und Temperatur Kanal A (siehe Beispiel oben)
• Leitfähigkeit und Temperatur Kanal B
• Uhrzeit und Datum
• Messwert Kanal A, Kanal B und Durchuss
• Ausgangsströme
Hinweis: Durch Drücken der Taste meas in der Betriebsart Messen
lassen sich die Displaydarstellungen temporär für ca. 60 s einblenden.
Um das Gerät an die Messaufgabe anzupassen,
muss es konguriert werden!
Anzeige ent-
spricht OUT1:
z.B. Messgröße
Kanal A
Anzeige ent-
spricht OUT2:
hier z.B.
Temperatur
Kanal A
Taste enter

19
Tastatur
Taste Funktion
meas • Im Menü eine Ebene zurück
• Direkt in den Messmodus (> 2 s drücken)
• Messmodus: andere Displaydarstellung
info • Informationen abrufen
• Fehlermeldungen anzeigen
enter • Kongurierung: Eingaben bestätigen,
nächster Kongurierschritt
• Kalibrierung:
weiter im Programmablauf
menu • Messmodus: Menü aufrufen
Pfeiltasten
auf / ab • Menü: Ziernwert erhöhen / verringern • Menü: Auswahl
Pfeiltasten
links / rechts • Menü: vorherige/nächste Menügruppe • Zahleneingabe: Stelle nach links/rechts
Sensorüberwachung Sensocheck, Sensoface
Sensocheck überwacht kontinuierlich den Sensor und die
Zuleitungen. Sensocheck ist parametrierbar (Werkseinstellung: Aus).
Sensoface gibt Hinweise über den Zustand des Sensors.
Die drei Sensoface-Piktogramme geben Diagnose-Hinweise
auf Wartungsbedarf des Sensors.
Bei traurigem Sensoface wird das Display„lila“.
Mit der Taste info kann ein Hinweis abgerufen werden

20
Display
MEMO SENS
1234 567 891011
171819202122
12
13
14
15
16
23
24
Signalfarben (Displayhinterleuchtung)
rot
rot blinkend Alarm (im Fehlerfall: blinkende Anzeigewerte) Fehleingabe: unzulässiger Wert bzw. falsche Passzahl
orange HOLD-Zustand (Kalibrierung, Kongurierung, Service)
türkis Diagnose
grün Info
lila Sensoface-Meldung
1 Temperatur
2 Sensocheck
3 Intervall/Einstellzeit
4 Sensordaten
5 nicht verwendet
6 Meldung Grenzwert:
Limit 1 bzw. Limit 2
7 Alarm
8 Service
9 Kanal A / Kanal B
10 Kalibrierung
11 nicht verwendet
12 Wartezeit läuft
13 Info verfügbar
14 HOLD-Zustand aktiv
15 Hauptanzeige
16 Nebenanzeige
17 weiter mit enter
18 nicht verwendet
19 Diagnose
20 Konguriermodus
21 Kalibriermodus
22 Messmodus
23 Sensoface
24 Messwertzeichen