The pH600 is a microprocessor controlled, loop powered isolated pH
transmitter with all power being supplied from the two wire current
loop connection. Isolation enables the pH probe to be at a potential
relative to ground without affecting the integrity of the pH
measurement. The two wire connection eliminates the requirement of a
separate supply in addition to the loop supply voltage.
Features
Temperature-compensated pH or ORP measurement.
Two-wire field mounted transmitter – suitable for multiple-loop installations with a central controller.
Local display of pH/ORP and temperature – suitable for use as a stand-alone pH monitor.
Isolated 4-20mA signal.
Simple pushbutton operation.
Tough IP65 die-cast Aluminium enclosure.
Plug and socket connectors for easy installation and maintenance.
Tool-free operation – no dip-switches or potentiometers.
Suitable for masthead mounting (as pictured) or wall mounting.
The pH600 two-wire field mounted transmitters, with the appropriate
sensors, are designed to continuously measure the pH or ORP in
industrial processes. The pH600 transmitters include all the circuitry
necessary for the measurement and transmission of an isolated 4-20mA
linear signal. All the transmitter’s functions are accessible through
the pushbutton interface – there are no potentiometers or dip-switches.
Two-point calibration of the signal is accomplished using the standard
calibration routine. The pH600 can also temperature compensate pH
readings using a 100 ohm TC element.
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
Millivolt
Range
-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
12V to 24V dc
Load Resistance
600 ohm Max
Model 762 Probe Assembly
With the addition of a Model 762 probe assembly and
electrodes, the pH600 becomes a complete pH sensing unit. The most
common usage of the 762 is with a wand, as shown above. Wands are
available in lengths of 40, 70 and 100cm, although other lengths are
available to special order.
Ordering Information
500/0020
pH600 isolated two-wire pH transmitter
500/0031
Complete pH monitor: pH600, 762, electrodes and 40cm wand.
500/0032
Complete pH monitor: pH600, 762, electrodes and 70cm wand.
500/0033
Complete pH monitor: pH600, 762, electrodes and 100cm wand.
500/0036
Budget pH monitor: pH600, 425 probe and 40cm wand.
