Knick Stratos Pro A201 PH User manual

®
User Manual Stratos Pro A201 PH
pH Measurement
Read before installation.
Keep for future use. www.knick.de

2
Supplemental Directives
Read this document and retain it for future reference. Before assem-
bling, installing, operating, or maintaining the product, ensure that
you fully understand the instructions and risks. Observe all safety
instructions. Failure to follow the instructions in this document may
result in serious injury and/or property damage.
This document is subject to change without notice.
These supplemental directives explain how safety information is laid
out in this document and what content it covers.
Safety Chapter
This document's Safety chapter is designed to give the reader a basic
understanding of safety. It illustrates general hazards and gives strate-
gies on how to avoid them.
Safety Guide
The external Safety Guide is designed to give the reader a basic
understanding of safety. It illustrates general hazards and suggests
strategies on how to avoid them.
Warnings
This document uses the following warnings to indicate hazardous
situations:
Symbol Category Meaning Remark
WARNING Designates a situation that can lead to death or
serious (irreversible) injury.
The warnings
contain information
on how to avoid
the hazard.
CAUTION Designates a situation that can lead to slight or
moderate (reversible) injury.
None NOTICE Designates a situation that can lead to property
or environmental damage.
Additional Safety Information
Stratos Safety Guide

3
Documents Supplied
Ex devices:
Control Drawings
EU Declaration of Conformity
Safety Guide
In ocial EU languages and others
Quickstart Guides
Installation and rst steps:
• Operation
• Menu structure
• Calibration
• Error messages and recommended actions
Test Report 2.2 According to EN 10204
Electronic Documentation
www.knick-international.com:
Manuals + software

4
Table of Contents
Supplemental Directives........................................................................ 2
Documents Supplied .............................................................................. 3
Safety ......................................................................................................... 7
Intended Use....................................................................................................7
Introduction ............................................................................................. 9
Overview of Stratos Pro A201PH........................................................ 12
Assembly................................................................................................. 13
Package Contents.........................................................................................13
Mounting Plan, Dimensions.....................................................................14
Pipe Mounting, Protective Hood............................................................15
Panel Mounting.............................................................................................16
Electrical Installation ............................................................................ 17
Rating Plates / Terminal Assignments...................................................18
Wiring of Stratos Pro A201PH ..................................................................19
Wiring Examples ...........................................................................................20
User Interface, Keypad ......................................................................... 31
Display..................................................................................................... 32
Signal Colors (Display Backlighting)......................................................32
Measuring Mode...........................................................................................33
Selecting the Mode / Entering Values ..................................................34
Display in Measuring Mode................................................................. 35
Color-Coded User Interface................................................................. 36
Operating Modes................................................................................... 37
Menu Structure of Modes and Functions............................................38
HOLD Mode....................................................................................................39
Alarm.................................................................................................................40
Alarm and HOLD Messages......................................................................41

5
Table of Contents
Configuration ......................................................................................... 42
Menu Structure of Configuration...........................................................42
Parameter Set Selection.............................................................................44
Configuration (Template for Copy)........................................................50
Sensor...............................................................................................................52
Sensor Verification (TAG, GROUP) ..........................................................68
Current Output 1 ..........................................................................................70
Current Output 2 ..........................................................................................78
Temperature Compensation ....................................................................80
CONTROL Input (TAN SW-A005).............................................................84
Alarm Settings...............................................................................................88
Time and Date ...............................................................................................92
Measuring Points (TAG/GROUP) ............................................................94
Display Backlighting....................................................................................94
Digital Sensors ....................................................................................... 96
Memosens Sensors:
Calibration and Maintenance in the Lab .............................................96
Memosens Sensors: Configuring the Device ....................................97
Replacing a Sensor.......................................................................................98
Calibration ............................................................................................100
Selecting a Calibration Mode ...............................................................101
Zero Adjustment (ISFET).........................................................................102
Automatic Calibration (Calimatic)....................................................... 104
Manual Calibration with Buffer Entry ................................................106
Data Entry of Premeasured Sensors................................................... 108
Product Calibration (pH).........................................................................110
ORP (Redox) Calibration..........................................................................112
Temp Probe Adjustment.........................................................................114
Measurement .......................................................................................115
Diagnostics ...........................................................................................116
Service ...................................................................................................121

6
Table of Contents
Operating States..................................................................................124
Maintenance and Repair ...................................................................125
A201B/X: Supply Units and Connection .........................................126
Product Line and Accessories ...........................................................127
Specifications .......................................................................................128
Buffer Tables.........................................................................................134
-U1- Specifiable Buffer Set ..................................................................... 147
Error Handling......................................................................................150
Error Messages.....................................................................................151
Decommissioning................................................................................154
Disposal.........................................................................................................154
Returns ..........................................................................................................154
Sensoface..............................................................................................155
HART: Typical Applications................................................................158
FDA 21 CFR Part 11 .............................................................................159
Electronic Signature – Passcodes........................................................159
Audit Trail .....................................................................................................159
Glossary.................................................................................................160
Index ......................................................................................................165

7
Safety
Always Read and Observe the Safety Instructions!
The device is constructed in accordance with the latest technology
and generally accepted safety rules and regulations.
Under certain circumstances, however, usage may pose risks to users
or cause damage to the device.
Commissioning must be carried out by specialist personnel authorized
by the operating company. If safe operation is not possible, the device
must not be switched on or, if it is already on, must be switched o
properly and secured against unintended operation.
Reasons to assume safe operation is not possible:
• the device shows visible damage
• failure to perform the intended function
• prolonged storage at temperature of below ‑30°C/‑22°F or above
70°C/158°F
• severe transport stresses
Before recommissioning the device, a professional routine test must
be performed. This test should be carried out by the manufacturer at
its factory.
Intended Use
StratosPro A201PH is a 2‑wire device for pH/mV, ORP, and tempera‑
ture measurement in industrial, environmental, food, and wastewater
applications.
Stratos Pro A201X and the separately approved Ex sensor may be
operated in Zone 0 / Division 1.
Stratos Pro A201B and the separately approved Ex sensor may be
operated in Zone 2.
The dened rated operating conditions must be observed when using
this product. They can be found in the Specications chapter of this
User Manual; see page 128.

8
Function Check Mode (HOLD Function)
After activating conguration, calibration, or service, StratosPro enters
function check mode (HOLD).
The current outputs respond in accordance with the conguration.
Operations must not be carried out while StratosPro is in function
check(HOLD) mode, as the system may behave unexpectedly and put
users at risk.
Control Drawings
If installing in hazardous locations, observe the information provided
on the included Control Drawings.
Devices Not Intended for Use in Hazardous Locations
Devices identied with an N in their product name must not be used
in hazardous locations.
Conguration
Replacing components may aect intrinsic safety. The modules are not
intended to be replaced on devices in the Stratos Pro A201 product
line.
Safety

9
Introduction
Housing and Mounting Options
• The sturdy molded enclosure is designed for IP66/IP67/ TYPE4X
Outdoor protection, is made of PBT glass ber reinforced PC, and
has the following dimensions: H148mm, W148mm, T117mm.
Knockouts in the housing enable
• wall mounting (with sealing plugs to seal the housing)
see page 14
• pipe mounting (Ø 40 … 60 mm, 30 … 45 mm)
see page 15
• panel mounting (cutout 138 mm x 138 mm acc. to DIN43700)
see page 16
Protective Hood (Accessory)
The protective hood, which is available as accessory, provides addi‑
tional protection against direct weather exposure and mechanical
damage; see page 15.
Connection of Sensors, Cable Glands
For connecting the cables, the enclosure provides
• 3 knockouts for M20x1.5 cable glands
• 2 knockouts for ½” conduit
For quasi‑stationary installations with Memosens sensors, we recom‑
mend using the M12 socket accessory (ZU0822) instead of a cable
gland – which allows simple replacement of the sensor cable without
opening the device.
Sensors
The device is designed for commercial sensors with a nominal zero
point at pH 7, ISFET sensors, and digital sensors.
(It can easily be retrotted for Memosens sensors.)

10
Display
Plain‑text messages on a large, backlit LC display enable intuitive op‑
eration. You can specify which values are to be displayed in standard
measuring mode (“Main Display,” see page 35).
Color-Coded User Interface
The colored display backlighting indicates dierent operating states
(e.g., alarm: red, HOLD mode: orange; see page 36). The display
backlighting can be switched o; see page 94.
Diagnostic Functions
“Sensocheck” automatically monitors the glass and reference elec‑
trodes; and the “Sensoface“ function clearly indicates the sensor
condition; see page 155.
Data Logger
The internal logbook (TAN SW‑A002) can handle up to 100 entries –
upto 200 with AuditTrail (TAN SW‑A003); see page 119.
Two Parameter Sets A, B
The device provides two parameter sets that can be switched manu‑
ally or via a control input for dierent process connections or dierent
process conditions.
For an overview of parameter sets (original for copy), see page 50.
Password Protection
Password protection (passcodes) for granting access rights during
operation can be congured; see page 123.
Automatic Calibration with Calimatic
You can choose from the most commonly used buer solutions,
seepage 134.
A custom buer set can also be entered; see page 147.
Introduction

11
I input
The analog (0) 4 ... 20 mA current input can
be used for external temperature compen‑
sation; see page 82.
Control Inputs (TAN SW-A005)
HOLD
(Floating digital control input)
The HOLD input can be used for external
activation of HOLD mode; see page 39.
CONTROL
(Floating digital control input)
The CONTROL input can be used either for
parameter set selection (A/B) or for flow
monitoring; see page 84.
Signal Outputs
The device provides two current outputs (for transmission of mea‑
sured value and temperature, for example).
Options
Additional functions can be enabled by entering a TAN (p. 123).
Introduction
5
6
13
14
10
11
Current
input
HOLD
input
CONTROL
input

12
Overview
Overview of Stratos Pro A201PH
17
9
8
C
H
I
F
G
D
E
K
5
6
13
14
B
AOutput 1
pH / mV/
temp
input
+3 V /–3 V
for ISFET
adapter
10
11
Output 2
1
2
3
4
RS-485
Control
input
Current
input
HOLD
input
meas. el.
ref. el.
SG
RTD
RTD
ISM GND
ISM data
ISFET
ISFET
+3 V
–3 V
Shield
+ Output 1, 2 / HART
– Output 1 / HART
– Output 2
RS-485 A
RS-485 B
GND/Shield
Input +
Input –
CONTROL +
CONTROL –
HOLD +
HOLD –

13
Assembly
Package Contents
Note: Check all components for damage upon receipt.
Do not use damaged parts.
The package should contain:
• Front unit, rear unit, bag containing small parts
• Specific test report
• Documentation (see page 3)
Fig.: Assembling the enclosure
1) Insertable jumper (3x)
2) Plate (1x), for conduit mount-
ing: Plate between housing
and nut
3) Cable tie (3x)
4) Hinge pin (1x), insertable from
either side
5) Enclosure screw (4x)
6) Blanking plug (2x, non-Ex
only)
7) Reduction sealing insert (1x)
8) Cable gland (3x)
9) Blanking cap (2x)
10) Hex nut (5x)
11) Plastic sealing plug (2x),
for sealing in case of wall
mounting

14
Assembly
Mounting Plan, Dimensions
Fig.: Mounting plan (All dimensions in mm!)
1) Cable gland (3 x)
2) Knockouts for cable gland or
½” conduit,
21.5 mm dia. (2 knockouts)
Conduit couplings not
included!
3) Knockout for pipe mounting
(4 x)
4) Knockout for wall mounting
(2 x)
148
148
42 42
42
14
117 41
21
43
12
34 80
74
6.2
4
3

15
Assembly
Pipe Mounting, Protective Hood
Fig.: Protective hood for wall and pipe mounting, accessory ZU 0737
(All dimensions in mm!)
Fig.: Pipe-mount kit, accessory ZU 0274 (All dimensions in mm!)
147199
91
185
1
2
3
4
1) Hose clamp with worm gear
drive to DIN 3017 (2 x)
2) Pipe-mount plate (1 x)
3) For vertical or horizontal posts
or pipes
4) Self-tapping screw (4 x)
ø40...ø60

16
Assembly
Panel Mounting
Fig.: Panel-mount kit, accessory ZU 0738 (All dimensions in mm!)
1) Circumferential sealing (1 x)
2) Screws (4 x)
3) Position of control panel
4) Span piece (4 x)
5) Threaded sleeve (4 x)
Cutout
138 x 138 mm (DIN43700)
< 30 76 31
1...22
1
2345

17
Electrical Installation
Before commencing with the installation, make sure that all lines to be
connected are de-energized.
Observe the safety instructions; see page 7.
Cable Glands
In a hazardous location, only cable glands with suitable approvals may
be used. The installation instructions of the manufacturer must be
observed.
Cable glands 5 cable glands M20 x 1.5 A/F 24mm
WISKA type ESKE/1 M20
Clamping ranges Standard sealing insert: 7 … 13 mm
Reduction sealing insert: 4 … 8 mm
Multiple sealing insert: 5.85 … 6.5 mm
Tensile strain Not permitted; Only suitable for“xed installation”
CAUTION! Risk of losing the specied ingress protection.
Fasten the cable glands and screw together the housing correctly.
Observe the permissible cable diameters and tightening torques.
Only use original accessories and spare parts.
NOTICE! Strip the insulation from the wires using a suitable tool to
prevent damage. For stripping length, see Specications.
1) Wire the current outputs. Deactivate unused current outputs in the
parameter settings or use jumpers.
2) Wire the inputs as necessary.
3) Connect the sensor.
4) Check whether all connections are correctly wired.
5) Close the housing and successively tighten the enclosure screws in a
diagonal pattern.

18
Electrical Installation
Rating Plates / Terminal Assignments
Fig.: Stratos Pro A201N rating plate at outside bottom of front
(illustrative example)
Fig.: Terminal assignments of Stratos Pro A201

19
1 9 10 18
HART
Terminal row 1
In addition:
2 HART pins (between terminal row 1 and 2)
Electrical Installation
Wiring of Stratos Pro A201PH
Terminal row 2
Sensor connection
MK-PH module
Fig.: MK-PH module
terminal assignments
Note:
When a Memosens
sensor is to be con-
nected to the RS-485
interface (terminals
1...4), you must remove
the MK-PH module.
Areas for placing the
screwdriver to pull out
the terminals
Fig.: Terminals, device opened, back of front unit

20
Wiring Examples
Example 1:
Measuring task: pH, temperature, glass impedance
Sensors (example): SE 555X/1-NS8N
Cable (example): ZU0318
Jumper!
Core
Shield
Sensor(s) Cable Device