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SECTION 1 GENERAL INFORMATION
1.1 Instrument Description
The Model SP-510™ Hardness Monitor is designed to monitor water softener
effluents continuously to detect hardness breakthrough due to softener exhaustion.
It enables commercial and industrial water softener operators to establish
automatic control of their systems by initiating regeneration sequences with the
instrument's alarm circuit. The Hardness Monitor is also suited for other
applications requiring the monitoring of hardness.
By selecting the appropriate hardness indicator and buffer reagents, the
monitor will alarm at 1, 2, 5, 10, 20, 50, or 100 mg/L hardness measured as
CaCO
3
. When the preselected alarm point is exceeded, the alarm relay responds,
closing the normally open contacts and opening the normally closed contacts.
These dry contacts can be used to actuate annunciators and/or initiate softener
regeneration. Control panel indicators provide “hard” or “soft” sample status.
The SP-510™ Hardness Monitor enclosure is environmentally rated for IP62 per
IEC 529. The enclosure is dust-tight, and drip-resistant but is not designed for
outdoor use.
The instrument is designed so electronic components are isolated from the
hydraulic components. Windows allow the operator to observe the display
indicators and reagent supply without opening the instrument enclosure.
Figure 1 Model SP-510™ Hardness Monitor
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