KROHNE PAC-050 User Manual
07/2008
Installation and
Operating Instructions
OPTISENS
PAC 050
Measuring and control device
for pH and ORP measurements
Manual OPTISENS PAC 050
Content
0. Introduction......................................................................................................................................................................................... 4
0.1 General..................................................................................................................................................................................................................4
0.2 Legal matters.........................................................................................................................................................................................................4
0.3 Safety..................................................................................................................................................................................................................... 5
0.3.1 Documentation symbols......................................................................................................................................................................................... 5
0.4 Features................................................................................................................................................................................................................. 6
0.4.1 Device.................................................................................................................................................................................................................... 6
0.4.2 Controller................................................................................................................................................................................................................ 6
0.4.3 Connections........................................................................................................................................................................................................... 6
1. Mechanical installation......................................................................................................................................................................7
1.1 Installation of panel-mounting converters.............................................................................................................................................................. 7
1.2 Installation of wall-mounting converters.................................................................................................................................................................8
2. Electrical connection..........................................................................................................................................................................9
2.1 Connection diagram panel-mounting converter................................................................................................................................................... 10
2.2 Connection diagram wall-mounting enclosure..................................................................................................................................................... 11
3. Operation of the device.................................................................................................................................................................... 12
3.1 How to adjust parameters.................................................................................................................................................................................... 12
3.1.1 Selection between alternatives............................................................................................................................................................................ 12
3.1.2 Adjustment of numerical parameters...................................................................................................................................................................13
3.2 Menu Overview.................................................................................................................................................................................................... 13
3.2.1 Main menu and basic settings .............................................................................................................................................................................13
3.3 Password and language ......................................................................................................................................................................................14
3.3.1 Enter password.................................................................................................................................................................................................... 14
3.3.2 Language............................................................................................................................................................................................................. 14
4. Adjustments for the measurement.................................................................................................................................................14
4.1.1 Measurement....................................................................................................................................................................................................... 15
4.2 pH measurement.................................................................................................................................................................................................. 15
4.3 ORP measurement.............................................................................................................................................................................................. 15
4.4 Calibration............................................................................................................................................................................................................ 16
4.4.1 Calibration procedure........................................................................................................................................................................................... 16
4.4.2 Buffers..................................................................................................................................................................................................................16
4.5 Temperature compensation................................................................................................................................................................................. 17
4.5.1 Calibration of the temperature measurement ...................................................................................................................................................... 17
5. Adjustments of the controller..........................................................................................................................................................17
5.1 ON/OFF controller................................................................................................................................................................................................ 18
5.2 P / PI controller as impulse-frequency controller .................................................................................................................................................19
5.3 P / PI controller as pulse-pause controller...........................................................................................................................................................19
5.4 Activation and deactivation of the controller ........................................................................................................................................................20
5.5 Turn-on delay....................................................................................................................................................................................................... 20
5.6 External controller stop........................................................................................................................................................................................20
5.7 Manual operation of the relays.............................................................................................................................................................................21
5.8 Limit values.......................................................................................................................................................................................................... 22
5.8.1 Turn-on delay....................................................................................................................................................................................................... 22
5.9 Dosage check......................................................................................................................................................................................................22
6. Alarm..................................................................................................................................................................................................23
6.1 Error messages.................................................................................................................................................................................................... 24
7. Output................................................................................................................................................................................................24
7.1 Current output...................................................................................................................................................................................................... 25
7.2 Serial interface RS485 (option)............................................................................................................................................................................ 25
8. Operation and maintenance............................................................................................................................................................25
8.1 Maintenance of the device................................................................................................................................................................................... 25
8.2 Display contrast.................................................................................................................................................................................................... 25
8.3 Exchange fuse.....................................................................................................................................................................................................25
8.4 Cleaning............................................................................................................................................................................................................... 25
8.5 Maintenance of the pH or ORP measurement.....................................................................................................................................................26
8.6 Disposal...............................................................................................................................................................................................................26
8.7 Service................................................................................................................................................................................................................. 26
8.7.1 Product info.......................................................................................................................................................................................................... 26
8.7.2 Analog inputs.......................................................................................................................................................................................................26
8.7.3 Erase settings (reset)...........................................................................................................................................................................................26
OPTISENS PAC 050 2
Manual OPTISENS PAC 050
9. Technical data................................................................................................................................................................................... 27
9.1 Technical data......................................................................................................................................................................................................27
9.2 Dimensions..........................................................................................................................................................................................................28
9.2.1 Panel-mounting enclosure...................................................................................................................................................................................28
9.2.2 Wall-mounting enclosure ..................................................................................................................................................................................... 28
10. Device return form............................................................................................................................................................................ 29
11. Customer settings - for reference...................................................................................................................................................30
3 OPTISENS PAC 050
Manual OPTISENS PAC 050
0. Introduction
0.1 General
This manual applies to the following devices:
It contains technical information for the installation, start-up and maintenance. If you have any questions not
0.2 Legal matters
Device and type Revision date
AC 050 pH/ORP P 06 / 05
AC 050 pH/ORP W 06 / 05
included in this manual please contact your supplier or the official representative of KROHNE Water Solutions
in your country.
Authorized personnel
Installation, connection, adjustment, start-up, and maintenance of the device are carried out by authorized
personnel with adequate qualification.
Liability
Responsibility as to suitability and intended use of these devices rests solely with the user. Improper
installation and operation may lead to loss of warranty. In addition, KROHNE Group's Standard General
Conditions of Sale and Delivery, found on the back of the invoice and forming the basis of the purchasing
contract, are applicable.
General limitation on liability
Unless otherwise expressly set forth in the Standard Terms and Conditions of Sale and Delivery, the Seller is
only liable for damages, whatever their legal basis is, in case they are based on willful action or gross
negligence. This limitation on liability does not apply in the event the Buyer raises claims relating to personal
injury or damages to property according to the product liability law based on a defect of the delivered goods.
Any advice given by the Seller, in particular regarding the application of the delivered goods, shall only commit
the Seller if given or confirmed in writing.
Returning the device
If you need to return the level gauge to the manufacturer or supplier, please read to the instructions and
complete the form given in the appendix.
Warranty
Please consult KROHNE Water Solutions General Terms and Conditions for information on guarantee and
liability.
OPTISENS PAC 050 4
Manual OPTISENS PAC 050
0.3 Safety
Please check for damages immediately after receiving the devices and report any damages within 24 hours to
the delivering company. Never work with a damaged device.
Keep this manual at a safe place where you can always look up the safety instructions and the information on
handling and usage.
This device was designed and built according to the safety measurements for electronic devices and has left
our company in perfect working condition. To preserve this condition and to ensure safe usage follow all
instructions carefully and pay special attention to all warnings issued in this manual. If the device is visibly
damaged or has been stored inappropriately or if there are any doubts concerning safe usage, shut it down
and make sure it cannot be restarted by accident.
0.3.1 Documentation symbols
A set of symbols is used to give warnings or information relevant to particular applications. These are defined
below:
Caution / Attention
Information that, if not followed, may lead to actions resulting in incorrect functioning of the device.
Warning
Information that, if not followed, may lead to actions resulting in measurement error, personal injury and/or
NOTE
damage to the device.
Is used to highlight interesting details.
5 OPTISENS PAC 050
0.4 Features
0.4.1 Device
Measuring ranges
0.4.2 Controller
0.4.3 Connections
Temperature measuring ranges -30.0…+140.0°C
Display measured value with dimension
Temperature compensation manually or automatically with Pt100 or Pt1000
Calibration automatic recognition of the calibration solutions in arbitrary order
Set points 2 set points with adjustable direction
Controller types ON/OFF controller with hysteresis
Hysteresis 0.00…14.00 pH or 0…1500 mV
P range X
Integral time T
Least pulse 0.1…9.9 s
Pulse+ pause time 02…99 s
Impulse frequency 00…72 equiv. to 0...7200 pulses/h
Turn-on delay 0…200 s
Alarm function min. and max. limit and onset delay, power failure alarm,
Dosage control 0…2000 s
Relays 3 potential-free contacts (2x controller, 1x alarm)
Analog output 0/4…20 mA galvanically isolated
Analog inputs 1 measuring input for pH or ORP
Digital input external controller stop or lack-of-water indication
Serial interface (Option) RS 485, Baud rate 9600, data format 8 Bit,
0.00…14.00 pH or 0…1500 mV
P
N
Manual OPTISENS PAC 050
0.00…14.00 pH
-1500…+1500 mV
temperature with dimension
status display sensor, calibration, controller & alarm
P controller as Pulse-Pause-, Impulse-Frequency- or steady controller
PI controller as Pulse-Pause-, Impulse-Frequency- or steady controller
0…2000 s
impulse or permanent signal
6 A, 250 V, max. 550 VA
max. burden 500 Ohm
1 measuring input for Pt100 or Pt1000
1 start and 1 stop bit, no parity
OPTISENS PAC 050 6
1. Mechanical installation
On chapter 9.2 you will find detailed instructions for the installation.
For panel-type meters you have to prepare an opening of 92 x 92 mm / 3.6” x 3.6”. Install the device and fix it
with the two mounting clips which were part of the delivery.
You can install devices in wall-mounting enclosures either by hanging them upon the center slot or by sliding
the slot under a screw, which is an alternative for limited space. Either way you have to fix it additionally with
two screws.
Install the device in a place where it is not put under mechanical or chemical strain!
ATTENTION
1.1 Installation of panel-mounting converters
Mind the protection class:
• Panel mounting version: IP 54 (front), IP 30 (Housing)
• Wall mounting version: IP 65 (closed terminal cover)
Prepare an opening of 92 x 92 mm / 3.6” x 3.6”.
Manual OPTISENS PAC 050
Install the device from the front side and fix it with the
two mounting clips which were part of the delivery.
Screw tight until the device is fixed perfectly.
7 OPTISENS PAC 050
1.2 Installation of wall-mounting converters
Manual OPTISENS PAC 050
Unscrew the terminal cover.
Drill three holes (max. M5) according to the drawing.
Mind that there are two ways for installation:
(1) You can hang the device upon the upper screw.
In that case drill the upper hole 120mm / 4.7” above
the lower two.
(2) Or you can slip the fixture on the back of the
device under the upper screw. In that case the upper
hole has to be another 15mm / 0.6” higher.
Insert the upper screw and make sure to leave at
least 3 mm between wall and screw head for the
fixture.
Mount the device and fix it with the two lower
screws. Close the terminal cover or start with the
connections.
OPTISENS PAC 050 8
2. Electrical connection
ATTENTION
You will find a detailed connection diagram on the following pages.
Before connecting the power supply check the information on the nameplate of the device!
Input, output and control lines must be installed separate from each other and separate from power lines!
For inputs and outputs use screened lines and connect the screen on one side only.
The pH measurement is interference-sensitive. Use a special screened cable and over long distances or in
humid atmosphere additionally an impedance converter.
When using the relays, mind that with inductive loads, interference must be suppressed. If that is not
possible, the relay must be protected at the terminal block in the converter by a resistance-capacitance filter
or, in case of direct current, by a free- wheeling diode.
Manual OPTISENS PAC 050
Current up to Capacitor C Resistance R
60 mA 10 nF 260 V 390 Ohm 2 Watt
70 mA 47 nF 260 V 22 Ohm 2 Watt
150 mA 100 nF 260 V 47 Ohm 2 Watt
1.0 A 220 nF 260 V 47 Ohm 2 Watt
9 OPTISENS PAC 050
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