Pulse Instruments System 2 Bedienungsanleitung

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User Manual

System 2

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www.pulseinstruments.net

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943 Flynn Rd. Camarillo, CA 93012 Phone: (800) 462-1926 Fax: (800) 878-9172

Pulse Instruments System 2 with 7215 Manual

Version 1.1

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Table of Contents

1. OVERVIEW............................................................................................................................. 2

1.1 INTRODUCTION....................................................................................................2

1.2 FEATURES ..........................................................................................................2

2. SPECIFICATIONS..................................................................................................................3

3. FUNCTION ............................................................................................................................. 3

3.1 OPERATION.........................................................................................................3

3.2 MONITORING.......................................................................................................3

3.3 CONTROL............................................................................................................3

3.4 HANDS FREE.......................................................................................................3

4. SYSTEM COMPONENTS ...................................................................................................... 4

5. SYSTEM LAYOUT ................................................................................................................. 5

6. INSTALLATION...................................................................................................................... 6

6.1 INSTRUMENT CONTROL PANEL ............................................................................6

6.1.1 Mounting and Location............................................................................................... 6

6.1.2 Electrical and Power.................................................................................................. 6

6.2 PRESSURE SWITCH.............................................................................................7

6.3 FLOW CELL.........................................................................................................8

6.3.1 2PRS001.................................................................................................................... 8

6.3.2 FC04 .......................................................................................................................... 8

6.4 CHEMICAL METERING PUMPS ..............................................................................9

7. CONFIGURATION / SETUP................................................................................................. 10

7.1 POWER UP.......................................................................................................10

7.2 CONTROL SET POINTS ......................................................................................10

7.3 CONTROLLER CONNECTION...............................................................................10

7.4 CHEMICAL METERING PUMP CONTROL ..............................................................11

7.4.1 Priming..................................................................................................................... 11

8. MAINTENANCE ................................................................................................................... 12

8.1 ELECTRODE CLEANING......................................................................................12

8.2 CALIBRATION ....................................................................................................12

8.2.1 pH Calibration.......................................................................................................... 12

8.2.2 ORP Calibration....................................................................................................... 12

8.3 ELECTRODE REPLACEMENT...............................................................................12

8.4 CHEMICAL METERING PUMP..............................................................................12

9. TROUBLE SHOOTING GUIDELINES................................................................................. 13

9.1 SENSOR FAILED ................................................................................................13

9.2 SENSOR CABLE IS DAMAGED..............................................................................13

9.3 SENSORS NEED MAINTENANCE ..........................................................................13

9.4 CHEMICAL PUMP FAILED....................................................................................13

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1. Overview

1.1 Introduction

Fresh fruit and vegetable harvesting, post-harvest handling and cooling, packing and

processing activities that involve the use of water have a higher potential of

contamination by plant pathogens and microbes. Small errors in contamination

prevention and water disinfection procedures can have severe consequences due to the

ease of spread of microbes, particularly in re-circulated water systems.

Accurate monitoring and recording of disinfection procedures is an important component

of a sound post-harvest quality and safety program. Oxidation-Reduction Potential

(ORP), measured in millivolts (mV), has been introduced to fresh produce packers and

shippers as an easily standardized approach to water disinfection for harvest and post-

harvest handling. Operationally, much like a digital thermometer or pH probe, ORP

sensors allow for easy monitoring, tracking, and automated maintenance of critical

disinfectant levels in water systems.

The purpose of this manual is to provide users with instructions on how to operate the

water disinfection system and a brief overview of the application of ORP monitoring to

post-harvest sanitation processes.

1.2 Features

System 2, a pH and ORP control system, is housed in a NEMA 4X weatherproof

enclosure, which is an essential HACCP tool. This simple modular design offers

affordable continuous monitoring and control.

•Works with any oxidizer

•Sensors monitor pH and ORP

•Controller automatically turns chemical pump On or Off as needed

•Always maintains a tight chemical concentration range

•Injects chemical only as needed

•Self-cleaning sensors allow for low maintenance

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2. Specifications

Condition Specifications

Monitoring Range pH: 0.00 to 14.00 pH

ORP: -1999 to 1999 mV

Control Range pH: 2.5 to 11.00 pH

ORP: 200 to 950 mV

Accuracy pH: ± 0.01 pH

ORP: ± 1 mV

Power 115 VAC; 10 Amps

Control Panel Weight 13 lbs

Control Panel

Dimension Height x Width x Depth: 10 in x 8 in x 6 in

3. Function

3.1 Operation

The System 2 provides complete automation of the water disinfection process and

chemical treatment. It utilizes unique capabilities for a “Hands Free” operation of water

treatment, allowing for true automation 24 hours a day. The System 2 works with any

oxidizer such as chlorine, chlorine dioxide, bromine, ozone, peroxide, and peroxyacetic

acid.

3.2 Monitoring

This system monitors pH in the range of 0 to 14 pH. This system monitors ORP in the

range of 0 to 1000 mV.

3.3 Control

Under normal conditions, pH is controlled by the system to the pH level set at the

controller. When the pH rises above the high set point value, the acid pump

automatically turns ON via a control relay and adds acid to the water until the pH lowers

down to the set point value, and then shuts off.

Under normal conditions, ORP is controlled by the control system to the ORP level set at

the controller. When the ORP value drops below the low set point value, the oxidizer

pump automatically turns ON via a control relay and adds oxidizer to the water until the

ORP value rises to the set point value, and then shuts off.

3.4 Hands Free

A flow switch interface only allows the operation to occur if there is flow in the process. If

this feature is being utilized, the logic works, so that if there is water flow through the

electrode flow cell, the chemical injection will start treating the water as needed. If no

flow is detected, the instrument control system will continue monitoring, but will not allow

any chemical injection. No water treatment will occur in the absence of flow.

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4. System Components

pH & ORP 7215S-01

pH Electrode PI0020-pH

ORP Electrode PI0020-ORP

Flow Cell 2PRS001

Flow Switch FS400PC

Two Chemical Pumps PBMA

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5. System Layout

Fig. 1 System Diagram

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6. Installation

The two primary components, Control Panel and Electrodes, should be preferably

mounted as close to one another as possible but no greater than 50 feet apart. (See the

system layout, Fig. 1).

6.1 Instrument Control Panel

6.1.1 Mounting and Location

Mount the control panel on a secure stand, bracket, or wall using the mounting feet

provided. Location of the instrument panel should be determined according to process

layout, keeping in mind that it is preferable to locate the control panel in a dry

environment whenever possible even though it is rated for wet environments at NEMA

4X.

The control panel should be accessible for routine maintenance, and easy viewing of the

front digital display. It should also be located with enough space underneath of at least

two feet for mounting the Injection Manifold, along with the switches and cables.

6.1.2 Electrical and Power

The control panel requirements are 115 VAC at 10 Amp. The panel is supplied with a

three prong grounded plug. Extra attached loads such as valves, mixers, and other such

devices should be accounted in the total electrical requirements.

WARNING: To reduce the risk of electrical shock, the control panel must be plugged

into a grounded outlet with ratings conforming to the requirements of the control panel,

and any other electrical loads connected to it. The panel should be connected to a good

ground. DO NOT USE ADAPTERS! All wiring must conform to local electrical codes.

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6.2 Pressure Switch

PS110

Pressure Switch inside the

Enclosure

PS110, pressure switch comes with NEMA 4X enclosure with 110VAC power receptacle

to plug in a device. The sensitivity of the pressure switch can be adjusted by turning the

dial inside of the receptacle (see picture above). For high pressure, reduce sensitivity

and loosen the dial. For low pressure, increase sensitivity and tighten the dial.

PS110 is easy to use and simple to install. Fittings, power cord, drop cord, along with a 5

feet tubing are provided in the package.

A pressure switch interface only allows the operation to occur if there is pressure in the

process. If this feature is being utilized, the logic works, so that if there is pressure in the

pipe, water flow through the electrode flow cell, the chemical injection will start treating

the water as needed. If no pressure is detected, PS110 will not supply power to the

control panel, therefore no operation.

Power coming

from the Outlet PS110 provide power

to control panel

PS110 Control Panel

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6.3 Flow Cell

Flow cell allows water to enter from one end of the flow port and exits the other, while the

electrodes take their measurement.

6.3.1 2PRS001

Specification:

Uses in clean water application

Holds pH and ORP electrodes

½” NPT Ports

Installation: install a straight pipe from one of the flow

cell to the other end.

6.3.2 FC04

Flow Cell Flow Cell Installation

The pipe is in a U shape to trap water, so that the electrodes

will stay wet. For some electrodes, it is essential that they

stay wet at all time.

Specification:

Uses in dirty water or water with some solids application

Holds pH and ORP electrodes (1/2” NPT)

Two large water flow ports (1 ¼” NPT)

Sampling

port

Extra port

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6.4 Chemical Metering Pumps

Choose a location for the pump, which is clean, dry, close to an electrical outlet, and

allows convenient access to stroke length control, frequency control, and tubing

connections. Avoid areas where ambient temperature exceeds 122 ºF (50 ºC) or falls

below 32 ºF (0 ºC), or where the pump or tubing would be exposed to direct sunlight

(See the pump manual for details).

Flooded Suction Mounting

Recommended for liquids that out-gas Shelf Mount

Maximum 5 feet suction lift Tank Mount

Maximum 5 feet suction lift

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