Proportional pH/mV controllers

June 2002 Maintenance, Test & Measurement, Calibration

The new range of proportional, PID and On/Off controllers from Hanna Instruments are the accumulation of 19 years of R&D at Hanna. The pH 500 and mV 600 offer many possibilities, from single and dual setpoints to On/Off or proportional dosage, via potential free contacts or 4-20 mA control signals. Isolated outputs are hardware and software selectable either in voltage or current modes with zoom facility on any two points, to increase resolution of the output signal. A bi-directional RS232 interface is also available, so the user can monitor, control and log the operations of the controller using the software supplied. Temperature compensation is either automatic, through a PT 100 temperature probe, or manual. Password protection ensures that only authorised users have access to the settings. The hysteresis band can be set independently to fine tune dosing with the On/Off control mode. The proportional band and time period is also user selectable on the proportional models to avoid overdosing of chemicals. A PID with a 4-20 mA control signal is also available. Competitively priced, they are suitable for wherever accurate dosing is required.

Pierre Joubert, Hanna Instruments

011 615 6076

Further reading:

Collect data three times faster
SKF South Africa Maintenance, Test & Measurement, Calibration
SKF has extended its renowned Microlog Analyzer family of data collection devices with the addition of the Microlog Analyzer dBX. Currently SKF’s most powerful diagnostic tool, this cutting-edge device redefines diagnostic capabilities, enabling users to take measurements three times faster than its predecessor.

Read more...

---

The criticality of maintenance in the water and wastewater segment
Schneider Electric South Africa Maintenance, Test & Measurement, Calibration
In a time of water shedding, climate change and ageing infrastructure, the importance of maintenance and support in the water and wastewater segment cannot be overstated.

Read more...

---

How dry ice blasting is revolutionising the mining industry
Maintenance, Test & Measurement, Calibration
Dry ice blasting has emerged as a game-changing technology for the mining industry, offering a range of advantages that are reshaping traditional cleaning methods.

Read more...

---

Quality test tools save costs at pulp and paper mill
Comtest Editor's Choice Maintenance, Test & Measurement, Calibration
A case study on how preventive maintenance and a few good test tools avoided unnecessary motor replacements at a pulp and paper company.

Read more...

---

The logical solution to oil and gas industry corrosion
Maintenance, Test & Measurement, Calibration
The consequences of corrosion in the oil and gas industry can be astronomical. The simple culprit is metal reacting with oxygen and moisture, degrading it back to its natural state.

Read more...

---

Lube tip: foaming is affected by oil level
Wearcheck Maintenance, Test & Measurement, Calibration
In a circulating system, it is crucial to check the oil level before introducing anti-foam agents to address a foaming problem.

Read more...

---

Microfine filtration boosts fuel quality and reduces equipment failure
Maintenance, Test & Measurement, Calibration
The path to contamination-free fuels relies on a combined effort from refiners to transporters, storage depots, handlers and end users. Prior to use, fuels can be polished with multi-pass microfine filtration systems such as those exclusively manufactured by ISO-Reliability Partners.

Read more...

---

Supporting capital investment in machinery
Maintenance, Test & Measurement, Calibration
Industrial and mining operations are under increased financial pressure in the current economic and social climate in South Africa. This means that when businesses make capital investments in new equipment, they need to be sure that the machinery will function optimally for as long as possible.

Read more...

---

High-accuracy automated pressure calibrator
Maintenance, Test & Measurement, Calibration
The Additel 762 Automated Pressure Calibrator is unlike any other pressure calibrator on the market. This revolutionary product is a complete turnkey solution for automation of pressure calibration work ...

Read more...

---

Handheld pressure calibrator
Maintenance, Test & Measurement, Calibration
The 273Ex from Additel is an intrinsically safe handheld multifunctional pressure calibrator with an intuitive colour touchscreen interface. The unit features built-in quick test tasks and optional HART ...

Read more...

---