ABB 7651, Инструкция по эксплуатации

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6
…2 PREPARATION
3 MECHANICAL INSTALLATION
Red (Measuring Electrode)
Black (Reference Electrode)
A – Redox (ORP) and Manual
Temperature Compensated Systems
Blue
(Temp. Comp.)
B – pH Systems with Automatic
Temperature Compensation
Red
(Measuring Electrode)
Black
(Reference Electrode)
Used only on
4530/40 or 9180
(Cut back on other
instruments)
2.3 Checking the Cable Specification – Fig. 2.3
Check that cable length and termination is correct for the types
of electrode system being used – see Table 2.1 and Fig. 2.3.
2.4 Cleaning Options
The following methods of cleaning are available:
• Flow powered
• Ultrasonic
• Mechanical wiping
For assembly instructions refer to the appropriate instruction
manual (part no. IM/7600–CLN).
Caution.
• Ensure that the system cable is fed through the
electrode system cover (or dip tube) before the
cable is installed. To avoid the risk of damp or
corrosive air damaging the cable plugs, connect to
the electrodes as soon as possible.
• It is essential that fitted electrodes remain wet. If
there is loss of sample the fitted electrodes remain
serviceable while there is sample in the flowcell.
This may last for about a week depending on
prevailing climatic conditions. If it appears that
electrodes are drying out, periodically check and
top up the flowcell reservoir with clean water or
buffer solution.
3.1 Siting
3.1.1 Operating Limits
Model 7651 (Flow Type) see Fig. 3.1A for details
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
at 30psi)
Maximum operating pressure
at 25°C (77°F):
10.6bar (150psi)
Model 7652 (In-line Type) see Fig. 3.1B for details
pH range:
0 to 14
Operating temperature range: 0 to 70°C (32 to 158°F)
Maximum operating temperature: 70°C (158°F), with no
pressure
Maximum operating pressure
at 25°C (77°F):
2.6bar (37psi)
Model 7654/5/6 (Dip Type)
pH range:
0 to 14
Operating temperature range: 0 to 80°C (32 to 176°F)
Maximum operating temperature: 80°C at 2.8bar (176°F
at 40psi)
Maximum operating pressure
at 25°C (77°F):
2.8bar (40psi)
Model 7660 (Flow Type)
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
at 30psi)
Maximum operating pressure 0.3bar (5psi)
at 25°C (77°F):
Model 7661 (Flow Type) see Fig. 3.1C for details
pH range:
0 to 14 (0 to 11 at elevated
temperatures)
Operating temperature range: 0 to 110°C (32 to 230°F)
Maximum operating temperature: 110°C at 1.7bar (230°F
at 25psi)
Maximum operating pressure
at 25°C (77°F):
6.6bar (95psi)
Model 7664/5 (Dip Type)
pH range:
0 to 14
Operating temperature range: 0 to 110°C (32 to 230°F)
Fig. 2.3 Cable Termination – Electrode Connections