Arc Module SU pH
Operating Instructions
Hamilton Warranty
Please refer to the General Terms of Sales (GTS).
Important Note
Copyright © 2017 Hamilton Bonaduz AG, Bonaduz Switzerland. All rights reserved. The reproduction of any part
of this document in any form is forbidden without the express written agreement of Hamilton Bonaduz AG.
Contents of this manual can be modified without previous announcement. Technical modifications reserved.
Greatest possible care was used on the correctness of the information in this manual. If errors should be discovered
nevertheless, Hamilton Bonaduz AG is pleased to be informed about it. Regardless of this, Hamilton Bonaduz AG
cannot assume liability for any errors in this manual or for their consequences.
TABLE OF CONTENTS
Table of Contents
1 General Information ............................................................................4
1.1 Intended Use ....................................................................................................... 4
1.2 About these Operating Instructions ..................................................................... 4
2 Liability .................................................................................................4
3 Safety Instructions .............................................................................. 5
3.1 General Precautions ............................................................................................ 5
3.2 Operation of the Arc Module ............................................................................... 5
3.3 Electrical Safety Precautions ............................................................................... 5
3.4 Chemical, Radioactive or Biological Hazard Precautions .................................... 6
4 Product Description ............................................................................ 6
4.1 General Description ............................................................................................. 6
4.2 Hardware Description ......................................................................................... 7
5 Installation ............................................................................................7
5.1 Unpacking and Cleaning ..................................................................................... 7
5.2 Electrical Connection ..........................................................................................8
5.3 Connection to PCS or Controller ......................................................................... 8
5.3.1 Layout and Overview ............................................................................... 8
5.3.2 Electrical connection of the 4–20 mA current interfaces .......................... 9
5.3.3 Electrical connection for the digital RS485 interface .............................. 12
5.4 Connection to PC or Mobile .............................................................................. 14
5.4.1 Layout and Overview ............................................................................. 14
5.4.2 ArcAir™ App ........................................................................................... 15
6 Operation ...........................................................................................16
6.1 Connecting the Arc Module to a OneFerm pH sensor ...................................... 16
6.2 Calibration ......................................................................................................... 16
6.3 Disconnecting the Arc Module from a OneFerm pH Sensor ............................. 17
7 Troubleshooting ................................................................................18
7.1 Arc Module and OneFerm pH Sensor Self-Diagnostics .................................... 18
7.1.1 Verify Status of Arc Module and OneFerm pH Sensor .......................... 18
7.1.2 Warnings ............................................................................................... 18
7.1. 3 E r r o r s ..................................................................................................... 19
7.2 Getting Technical Support ................................................................................ 19
7.3 Returning Arc Module for Repair ....................................................................... 19
8 Disposal ..............................................................................................20
9 Ordering Information ........................................................................20
9.1 Arc Module SU pH ............................................................................................ 20
9.2 OneFerm pH Sensors for the Arc Module SU pH ............................................. 20
9.3 Parts and Accessories ...................................................................................... 21
9.4 Services ............................................................................................................ 22
Arc Module SU pH Operating Instructions
3
1 General Information
1.1 Intended Use
The Arc Module SU pH is intended to be used with the dedicated OneFerm pH sensors for the measurement
of pH in Single Use (SU) applications (see Chapter 9.2). This Module provides both a 4-20 mA and a digital
Modbus signal, when connected to a OneFerm pH sensor. Additional equipement such as amplifier or transmitter are not required.
The Arc Module SU pH is not gamma or steam sterilizeable.
1.2 About these Operating Instructions
This manual refers to the Arc Module SU pH designated as «Arc Module» for the OneFerm pH sensors from
Hamilton Bonaduz AG.
ATTENTION! Essential information for avoiding personal injury or damage to equipment.
NOTE: Important instructions or interesting information.
2 Liability
The liability of Hamilton Bonaduz AG is detailed in the document «General Terms and Conditions of Sale and
Delivery,» chapter 12.
Hamilton is expressly not liable for direct or indirect losses arising from use of the Arc Module or sensor. It must in
particular be insured in this conjunction that malfunctions can occur on account of the inherently limited useful life
of the Arc Module or sensor contingent upon their relevant applications. The user is responsible for the calibration
and maintenance of the Arc Module or sensor. In the case of critical applications, Hamilton recommends using
back-up measuring points in order to avoid consequential damages. The user is responsible for taking suitable
precautions in the event of a module failure.
GENERAL INFORMATION • LIABILITY
3 Safety Instructions
ATTENTION! Read and follow the safety instructions carefully before installing and operating the
Arc Module.
3.1 General Precautions
For safe and correct use of the Arc Module, it is essential that both operating and service personnel follow
generally accepted safety procedures as well as the safety instructions given in this document, the «Arc Module
SU pH Operating Instructions».
Cleaning, assembly and maintenance should be performed by personnel trained in such work. When removing
and cleaning the Arc Module, it is recommended to wear safety goggles and protective gloves.
The Arc Module cannot be repaired by the operator and has to be sent back to Hamilton for inspection.
Necessary precautions should be taken when transporting the Arc Module. For repair or shipment the Arc
Module should be sent back in the original reusable packaging box. Every Arc Module sent back for repair
must be decontaminated (see also Chapter 7.3).
If the conditions described in these Operating Instructions are not adhered to or if there is any inappropriate
interference with the equipment, all of our manufacturer’s warranties become obsolete.
3.2 Operation of the Arc Module
The Arc Module must be used for its Intended Use (Chapter 1.1), and in optimum safety and operational
conditions. The specifications such as temperature or pressure defined on the Specification Sheet available
at www.hamiltoncompany.com must not be exceeded under any circumstances. Potential hazards exist if the
Arc Module is not operated correctly.
Strictily follow the instructions given to connect (Chapter 6.1) and disconnect (Chapter 6.3) the Arc Module
from a OneFerm pH sensor. Do not apply any forces to the bag or the OneFerm pH sensor. Faillure to do so
may break the OneFerm pH sensor and/or damage the bag integrity.
ATTENTION! Do not twist or turn the Arc Module to avoid damage or leakage.
3.3 Electrical Safety Precautions
Do not connect the Arc Module to a power source of any voltage beyond the power rating stated in the
Specification Sheet (www.hamiltoncompany.com).
Always use Hamilton VP cables for safe connection. Cables are available in a broad range of lengths
(Chapter 9.3). Make sure the cable is intact and properly plugged in to avoid any short circuit.
SAFETY INSTRUCTIONS
Arc Module SU pH Operating Instructions
5
Keep the Arc Module away from other equipment which emits electromagnetic radio frequency fields, and
minimize static electricity in the immediate environment of Arc Module and sensor. Carefully follow all the
instructions in chapter 5 to avoid electrical damage to the sensor. The contacts must be clean and dry before
sensor is connected to the cable.
ATTENTION! Switch off the power supply and unplug the connector before dismounting the Arc
Module.
3.4 Chemical, Radioactive or Biological Hazard Precautions
Selection of the appropriate safety level and implementation of the required safety measures for working with
the Arc Module is the sole responsibility of the user.
If working with hazardous liquids, observe and carry out the maintenance procedures, paying particular
attention to cleaning and decontamination. If the Arc Module becomes contaminated with biohazardous,
radioactive or chemical material, it should be cleaned. Failure to observe and carry out the maintenance
procedures may impair the reliability and correct functioning of the measuring module.
4 Product Description
4.1 General Description
Optimal yields in bioprocesses are only obtained with extensive process control, especially precise monitoring
of pH value. The glass pH electrode is the most robust and reliable device available for the measurement of pH.
The reusable Arc Module converts the weak electrochemical signal of the OneFerm pH sensor into a digital
signal. The Arc Module stores all relevant sensor data, including calibration and diagnostic information, simplifying the calibration and maintenance. It directly connects to the PCS without a transmitter and provides either
4-20 mA or digital Modbus communication.
The Arc Module used with the OneFerm pH sensor is compatible with all other components of the Hamilton
Arc family, including a complete family of intelligent sensors (pH, ORP, dissolved oxygen and conductivity) and
accessories. Reusable and SU sensors can work on the same system. Additional wireless sensor diagnostics
functionality is enabled by the ArcAir™ App running on mobile devices (e.g. Hamilton’s Arc View Mobile) and
computers.
Key benefits include:
• Electrochemical pH measurement with stable measurement signal
• Reusable electronic, detachable from the sensor
• No separate transmitter needed
• Simple maintenance with robust industrial design
• Direct digital Modbus or analog communication to the PCS system via 4-20 mA standard signal
PRODUCT DESCRIPTION
4.2 Hardware Description
Always check the Arc Module for possible defects after first unpacking. In the unlikely event of a damaged Arc
Module, return it immediately in original packing to your Hamilton representative.
ARC LOGO, SERIAL AND REF NUMBER SOCKET WITH VP6 CONNECTOR
COLOR CODING FOR ONEFERM pH SENSORS
SOCKET HEAD WITH VP8 CONNECTOR
COUPLING NUT
Figure 1: Arc Modu le SU pH
The Arc Module and OneFerm pH sensors are delivered directly from the factory, pre-calibrated according to
operational specifications. The integrated 4–20 mA analog interface and RS485 digital interface (Modbus RTU) are
configured according to factory defaults. Full details, including serial number and most important specifications
can be found on the sensor tag provided with each sensor.
To be sure to avoid electrical damage to the sensor, carefully follow all the instructions in the section entitled
«Electrical Connection.» Before using the sensor for measurement, monitoring or regulation, be sure to first check
its configuration by means of an operational test.
5 Installation
5.1 Unpacking and Cleaning
1. Carefully unpack the Arc Module SU pH. Enclosed you will find the Arc Module and the Arc Module SU pH
Quick Guide.
2. Inspect the sensor for shipping damages or missing parts.
3. For cleaning purposes of the Arc Module, soak a paper towel with Isopropanol 70% and wipe down the
module. After cleaning the module, air dry the isopropanol prior to connecting with the sensor. Make sure
that all contacts of module and sensor are completely dry to prevent electrical damage (short circuit).
NOTE: Arc Module is not designed for gamma or steam sterilization.
INSTALLATION
Arc Module SU pH Operating Instructions
7
ATTENTION! The sensor can measure and communicate over digital RS485 interface up to a temperature of 60 °C. If the process temperature exceeds 50 °C, both 4-20 mA interfaces are set to 3.5 mA
output. The analog measurements will continue when the temperature drops back below 50 °C.
NOTE: The performance of the OneFerm pH sensor can change by damage of the electrodes in aggressive
media, high temperature, or by contamination of the electrodes during the sensor’s lifetime. A quality indicator
of the Arc Module shows deviation of the zero point when performing a product calibration. The quality indicator
status is updated automatically after each product calibration.
5.2 Electrical Connection
The Arc Module is fitted with a VP8 socket head. The eight golden contacts are denoted as pin A to pin H.
For easy identification of each pin, the head has a notch between pin A and pin B.
For the easiest and safest connection of Arc Module, always use Hamilton VP8 cables, available in a range of
different lengths. To ensure highest signal quality standard, a cable between the OneFerm pH sensor and the
Arc Module is not recommended.
VP Pin Function
A 4–20 mA interface (mA interface #2)
B 4–20 mA interface (mA interface #1)
C Power supply: +24 VDC (7 to 30 VDC)
D Power supply: Ground
G RS485 (A)
H RS485 (B)
Figure 2: Pin configuration
5.3 Connection to PCS or Controller
5.3.1 Layout and Overview
The Arc Module can be connected to the PCS or controller by a wired connection (for reference numbers
see also «Parts and Accessories»):
INSTALLATION
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