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Alpha pH 500
2-Wire Transmitter pH / ORP
ROSS and the COIL trade dress are trademarks of Thermo Fisher Scientific Inc. U.S. patent 6,793,787.
AQUAfast, Cahn, ionplus, KNIpHE, No Cal, ORION, perpHect, PerpHecT, PerpHecTion, pHISA, pHuture, Pure Water, Sage, Sensing the Future, SensorLink, ROSS, ROSS Ultra, Sure-Flow, Titrator PLUS and TURBO2 are registered trademarks of Thermo Fisher.
1-888-pHAX-ION, A+, All in One, Aplus, AQUAsnap, AssuredAccuracy, AUTOBAR, AUTO-CAL, AUTO DISPENSER, Auto-ID, AUTO-LOG, AUTO-READ, AUTOSTIR, Auto-Test, BOD AutoEZ, Cable-Free, CERTI-CAL, CISA, DataCOLLECT, DataPLUS, digital LogR, DirectCal, DuraProbe, Environmental Product Authority, Extra Easy/Extra Value, FAST QC, GAP, GLPcal, GLPcheck, GLPdoc, ISEasy, KAP, LabConnect, LogR, Low Maintenance Triode, Minimum Stir Requirement, MSR, NISS, One-Touch, One-Touch Calibration, One-Touch Measurement, Optimum Results, Orion Star, Pentrode, pHuture MMS, pHuture Pentrode, pHuture Quatrode, pHuture Triode, Quatrode, QuiKcheK, rf link, ROSS Resolution, SAOB, SMART AVERAGING, Smart CheK, SMART STABILITY, Stacked, Star Navigator 21, Stat Face, The Enhanced Lab, ThermaSense, Triode, TRIUMpH, Unbreakable pH, Universal Access are trademarks of Thermo Fisher.
Guaranteed Success and The Technical Edge are service marks of Thermo Fisher.
PerpHecT meters are protected by U.S. patent 6,168,707. PerpHecT ROSS electrodes are protected by U.S. patent 6,168,707. ORION Series A meters and 900A printer are protected by U.S. patents 5,198,093, D334,208 and D346,753.ionplus electrodes and Optimum Results solutions are protected by U.S. patent 5,830,338.ROSS Ultra electrodes are protected by U.S. patent 6,793,787.ORP standard is protected by U.S. patent 6,350,367. No Cal electrodes are protected by U.S. patent 7,276,142.© 2009 Thermo Fisher Scientific Inc. All rights reserved. All trademarks are the property of Thermo Fisher Scientific Inc. and its subsidiaries.The specifications, descriptions, drawings, ordering information and part numbers within this document are subject to change without notice.This publication supersedes all previous publications on this subject.
Preface
This manual serves to explain the use of the Alpha pH 500 transmitter. It functions in two ways, firstly as a step by step guide to help you to operate the transmitter. Secondly, it serves as a handy reference guide. It is written to cover as many anticipated applications of the transmitter as possible. If there are doubts in the use of the transmitter, please do not hesitate to contact the nearest Authorized Distributor.
Thermo Scientific will not accept any responsibility for damage or malfunction to the transmitter caused by improper use of the instrument.
Remember to fill in the guarantee card and mail it back to your authorized distributor.
The information presented in this manual is subject to change without notice as improvements are made, and does not represent a commitment on the part of Thermo Scientific.
Copyright © 2009
All rights reserved
TABLE OF CONTENTS
1 |
INTRODUCTION |
1 |
2 |
PREPARATION |
2 |
2.1 |
Power Supply Requirements (SL2 Position) |
3 |
2.2 |
Connecting the Electrode & Temperature Probe (SL1 Position) |
3 |
3 |
INSTALLATION |
5 |
3.1 |
Wall Mount |
5 |
3.2 |
Panel Mount |
6 |
4 |
DISPLAY AND KEYPAD FUNCTIONS |
7 |
4.1 |
Display |
7 |
4.2 |
Keypad |
8 |
5 |
CALIBRATION |
9 |
5.1 |
Preparing the Transmitter for Calibration |
9 |
5.2 |
pH Calibration |
10 |
5.3 |
Relative mV Calibration |
11 |
5.4 |
Temperature Calibration |
11 |
6 |
ADVANCED SETUP FUNCTIONS |
12 |
6.1 |
Offset Setting (Unavailable in ORP mode) |
12 |
6.2 |
Output Range Setting |
13 |
6.3Temperature Compensation Setting (Unavailable in ORP mode)14
6.4 |
HOLD Current Setting |
17 |
6.5 |
Out-of-Range Current Setting |
17 |
6.6 |
Configuration |
18 |
7 |
PROBE CARE AND MAINTENANCE |
20 |
8 |
TROUBLE SHOOTING GUIDE |
22 |
9 |
SPECIFICATIONS |
23 |
10 |
TECHNICAL DIMENSIONS |
24 |
11 |
ACCESSORIES |
25 |
12 |
WARRANTY |
27 |
13 |
RETURN OF ITEMS |
27 |
1 INTRODUCTION
Thank you for selecting an Alpha pH 500 pH/ORP Transmitter. This transmitter is a microprocessor-based instrument that is designed to be sturdy and user-friendly. It is capable of measuring pH, mV and temperature.
This transmitter has many user-friendly features – all of which are completely accessible through the water-resistant membrane keypad. Your transmitter includes an instruction manual and a warranty card.
Please read this manual thoroughly before operating your transmitter.
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pH |
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READY |
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°C |
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ATC |
2 PREPARATION
Remove screws from the four corners at the back of the Transmitter, and remove back cover.
Connectors should be exposed as follows:
Figure 1 – Connection Guide
All wiring is done on 2 detachable connectors: –
1.9-pin connector (located on SL1 position) for pH electrode, temperature sensor and potential matching pin (PMP); &
2.3-pin connector (located on SL2 position) for power supply.
Using a suitable screwdriver, loosen screws from top of connector.
When inserting the wires, always hold connector with top screws facing up.
2.1Power Supply Requirements (SL2 Position)
This transmitter requires a 12 to 24V DC power supply. Other Transmitters and/or a chart recorder may be connected in series.
1.Insert positive loop wire from power supply to pin 1, tighten screw.
2.Insert negative loop wire to pin 2, tighten screw. This wire may be linked to a chart recorder or to negative terminal of power supply.
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Alpha pH500 |
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Power Supply |
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Chart recorder |
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2.2Connecting the Electrode and Temperature Probe (SL1 Position)
2.2.1To connect the pH or ORP electrode:
The pH transmitter accepts any combination |
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pH reference |
electrode for pH or ORP measurements |
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Clear sheath |
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1. Remove BNC connector from cable. |
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pH sensing |
Insulation |
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Screen |
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Two wires will be exposed. |
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2.Strip insulation, just enough to expose bare wires.
IMPORTANT: For pH/ORP sensing cable, remember to strip the inner black layer (screen) and expose the clear plastic sheath.
1.Insert pH sensing cable into pin 1 of connector. Tighten screw.
2.Insert pH reference cable into pin 2 of connector. Tighten screw.
NOTE: Instead of removing the BNC connection, Eutech offers an optional adapter (part number 05994-90 BNC to Spade Lug adapter) that can be used.
2.2.2To connect temperature probe:
For Automatic Temperature Compensated (ATC) pH readings, a 100Ω Pt RTD temperature probes can be used. Industrial pH electrodes are often offered with ATC, which will typically be bare wires.
3-wire probe
1.Insert Pt 100 sense wire to pin 5 of connector. Tighten screw.
2.Insert Pt 100 input wire to pin 6 of connector. Tighten screw.
3.Insert Pt 100 return wire to pin 7 of connector. Tighten screw.
2-wire probe:
1.Take a small length of wire and short pins 5 and 6 of connector. Insert Pt 100 sense wire into pin 6 of connector and tighten screws.
2.Insert Pt 100 return wire to pin 7 of connector. Tighten screw.
IMPORTANT: Temperature probe should always be together with pH probe, even during calibration. Make sure no bare wires are exposed and all screws are tightened for proper contact.
2.2.3To connect Potential Matching Pin (Liquid electrical interferences):
Connect the additional wire from the electrode to pin 8. Transmitter must be configured to ‘Symmetrical mode of operation’ - Please refer to ‘Advanced Setup Functions’, Section 6.6.2 – Selecting Asymmetrical or Symmetrical Mode of Operation.
3 INSTALLATION
3.1Wall Mount
3.2 Panel Mount
1. Prepare panel cut-out of |
Panel (side) |
92.0 mm by 92.0 mm |
2. Remove back cover of transmitter and slide it through panel cut-out
4. Thread rods through lugs until transmitter is held in place against panel
3. Attach lugs to either side of transmitter
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