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Instruction Manual pH/ORP Electrode System IM/7650_8 7600 Series...
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Cert. No. Q 05907 As a part of ABB, a world leader in process automation technology, we offer customers application expertise, service and support worldwide. EN 29001 (ISO 9001) We are committed to teamwork, high quality manufacturing, advanced technology and unrivalled service and support.
2 PREPARATION 2.1 Checking the Code Number – Fig. 2.1 A – 7651 (Polypropylene) B – 7660 (Stainless Steel) C – 7652 (Polypropylene) 7654 7664 E – 7661 (PVDF) D – Polypropylene 7655 PVDF 7665 7656 Fig. 2.1 System Types...
…2 PREPARATION 2.2 Identifying the Electrode Type – Fig. 2.2 and Table 2.1 A pH system is only as accurate as the electrodes used to make the measurement. To satisfy a wide range of applications, and to meet the demands of modern processes, the Company has 1730-000 Reference Electrode produced a range of electrodes to satisfy most requirements.
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2 PREPARATION… / 0 X X Note. For 1 metre and 2 metre dip systems using mechanical or – ultrasonic cleaning, please refer – to separate specification sheet. – Note. ultrasonic mechanical cleaning in Dip systems, refer to the appropriate manual for electrode details.
For assembly instructions refer to the appropriate instruction manual (part no. IM/7600–CLN). 3.1 Siting 3.1.1 Operating Limits Model 7651 (Flow Type) see Fig. 3.1A for details Red (Measuring Electrode) pH range: 0 to 14 Operating temperature range: 0 to 100°C (32 to 212°F) Maximum operating temperature: 100°C at 2.1bar (212°F...
Maximum operating temperature: 110°C (230°F) 3.2 Installing the System 3.2.1 Models 7651, 7652, 7660 and 7661 – Figs. 3.2 & 3.5 These may be mounted in any convenient position for the pipe connections, using flexible or rigid piping. Allow sufficient space...
…3 MECHANICAL INSTALLATION 3.2.2 Model 7652 – Fig. 3.3 Adjustable flanges to various standard drilling configurations are also available to mount dip models close to a closed tank wall. This is installed and held in position by the 2 in BS10 Table E fixing flange only.
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3 MECHANICAL INSTALLATION… See Fig. 3.6 for models 7651, 7652, 7660 and 7661, or Fig. 3.7 models 7654, 7655, 7656, 7664 and 7665, to access the sensor Unscrew and remove the holder. top cover. Drop the plug end of the...
…3 MECHANICAL INSTALLATION 3.3.2 Fitting the Reference Electrode – Figs. 3.8 There are two reference junctions available: a) Remove the reference electrode 1730-000 from its box; the • 1360 180 Small Reference Junction: supplied with all sealed box should also contain a bottle of KCl solution (slurry). reference electrodes.
Finally, tighten the gland nut to secure the connecting cable. Note. When fitting or removing the electrode connectors, hold the top section of the connector 3.4 Fitting the Reservoir – Models 7651, 7652, 7660 firmly while rotating the bottom section. Reference...
…3 MECHANICAL INSTALLATION and 7661 – Fig. 3.12 The reservoir comes partially assembled as shown in Fig. 3.12a. Complete the assembly and fill the reservoir as shown in Fig. 3.12b and Fig. 3.12c respectively. Filler Plug Filler Cap Reservoir Fit the reservoir rod into the sensor holder by inserting it firmly and fully into the correct location.
4 ELECTRICAL INSTALLATION 4.1 Connection to AX, 4500 and 4600 Series Transmitters – Fig. 4.1 and Table 4.1 System cable connections to the pH meter are shown in Fig. 4.1. For AX and 4600 series transmitters refer to the pH meter instruction manual.
…4 ELECTRICAL INSTALLATION 4.3 Cable Termination – Fig. 4.3 If the provided standard length cable requires shortening, the recommended preparation is as shown in Fig. 4.3. Strip back the overall cable sheath to measurements as shown and fit suitable sleeves and solder tags to the leads, for connection to the transmitter.
5 CALIBRATING THE SYSTEM General Calibration of Electrodes When the electrode system has been connected correctly and all electrical connections made to the associated pH transmitter, the system is ready for calibration by immersing the electrodes (using suitably sized beakers) in either: •...
6 ROUTINE MAINTENANCE 6.1 ‘O’ Ring Seals 4) The Reference Junction of the reference electrode may be Whenever the electrode system is opened at any point, all 'O' rings (especially the lower sensor holder 'O' ring), seals, cleaned by washing in water and wiping with a clean cloth. washers, etc.
7 SPARES …6 ROUTINE MAINTENANCE If satisfactory results are obtained, including the impedance 7.1 Models 7651, 7652 checks, then the fault is either the measuring electrode or the Top Cover 7650065 (sealed Reference reference electrode – see Section 6.4 Electrode)
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