3
Preliminary Examination
1. PRELIMINARY EXAMINATION
Remove the probe from the packing and examine it carefully.
Each probe is supplied with quick reference guide and probe quality certificate.
HI7630-28
two-ring probes are supplied with a protective cap on. Remove the cap prior to use.
HI7630-48
four-ring probes are fitted with a plastic support bung located at the end of the probe. Remove
the bung prior to use.
Note
: Save all packing material until you are sure that the probe works correctly. Any damaged or defective item
must be returned in its original packing material with the supplied accessories.
2. SAFETY MEASURES
General Safety & Installation Recommendations
• Electrical connection, installation, operation, and maintenance must be carried out by specialized
personnel only.
The specialized personnel must read, understand, and adhere to the instructions in this manual.
• Before connecting the probe to the process controller, disconnect the controller from the power line.
• User serviceable connections are all accessible inside controller’s enclosure.
• Before powering the controller, verify the probe wiring has been done following the instructions
detailed in this manual.
3. GENERAL DESCRIPTION & INTENDED USE
HI7630-28
and
HI7630-48
are Conductivity and Temperature probes designed to be paired with the
HI510
Universal Process Controller.
The probes are recommended for a wide range of water applications, from pure and ultrapure water (two-ring
series i.e.
HI7630-28
) to industrial process water (four-ring series i.e.
HI7630-48
).
The two-ring probes can be calibrated using a standard with a value close to the measurement value whereas the
four-ring probes provide stable measurements over a wide measure range and do not require frequent calibrations.
An integral
temperature sensor
measures the process temperature and adjusts the measured conductivity to
a reference temperature by applying specialized compensation standards:
•
Linear
: appropriate when it is assumed that the temperature coefficient of variation has the same value
for all measurement temperatures.
•
Standard
: appropriate for high-purity water measurements and documented in ASTM Standard D5391-14.
This setting should be used for resistivity measurements.
•
Natural
: appropriate for natural ground, well, or surface water (or water with similar composition) in
accordance with ISO7888 standard.
The result is reliable electrolytic conductivity (EC), TDS (Total Dissolved Solids), resistivity, or Seawater Salinity
in percent, psu, or ppt units.
