SENSOLUTION™ Model 762 pH
pH Probe Assembly
Order Codes
Full assembly: 500/0034
pH800 Analyser: 500/0080
The model 762 pH probe assembly is a loop-powered, isolated pH sensor, with all power being supplied from the two-wire current loop connection. Isolation enables the probe to be at a potential relative to ground without affecting the integrity of the measurement. The two-wire connection eliminates the requirement of a separate supply in addition to the loop supply voltage.
Features:
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Temperature-compensated pH or ORP measurement
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Two-wire field mounted analyser – suitable for multiple-loop installations with a central controller
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Local display of pH/ORP and temperature – suitable for use as a stand-alone pH monitor
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Isolated 4-20mA signal
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Simple pushbutton operation
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Tough IP65 die-cast Aluminium enclosure
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Plug and socket connectors for easy installation and maintenance
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Tool-free operation – no dip-switches or potentiometers
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Suitable for masthead mounting (as pictured) or wall mounting
With the inclusion of a pH800 analyser the Model 762 probe assembly and electrodes become a complete pH sensing unit. The analyser includes all the circuitry necessary for the measurement and transmission of an isolated 4-20mA linear signal.
The Model 762 assembly is manufactured from chemically resistant polypropylene and has spaces for two PG13.5 electrodes – a rugged glass pH electrode and glass temperature compensator. The reference is a double-junction arrangement with a large gel reservoir giving excellent stability in tough applications.
Technical Specifications:
pH
Range
0.00pH to 14.00pH
Resolution
0.01pH
Accuracy
±0.01pH
Temperature Range
-10°C to 110°C
Resolution
0.1°C
Accuracy
±0.5°C
MillivoltRange
-1000mV to 1000mV
Resolution
1mV
Accuracy
±2mV
General
Temperature Compensation
Auto (Pt100) / Manual (0° to 100°)
Number of Calibration Points
2
Calibration Buffers
4.01, 7.00, 10.01
Inputs
Asymmetrical/Symmetrical
Outputs
4.0mA to 20.0mA
Under-range Current Output
3.8mA/4mA (selectable)
Over-range Current Output
3.8mA/20mA (selectable)
Hold Current Output
22mA/Last Value (selectable)
Display
Custom LCD
Power Requirements
24V dc
Load Resistance
600 ohm Max