Introduction 4
1. INTRODUCTION
1.1. PRELIMINARY EXAMINATION
Remove the instrument and accessories from the packaging and examine it carefully.
For further assistance, please contact your local Hanna Instruments office or email us at tech@hannainst.com.
Each unit is supplied with:
• Power cable, 3 m (9.84’) long
• Set of cable gland seals
• Instrument quality certificate
• Quick reference guide with QR code for user manual download
Mounting kits for supported installations are sold separately.
Note: Save all packing material until you are sure that the instrument works correctly. Any damaged or
defective item must be returned in its original packing material with the supplied accessories.
1.2. SAFETY MEASURES
General Safety Precautions & Preliminary Installation Recommendations
Procedures and instructions detailed in this section may require special precautions to ensure the safety of the
personnel performing the operations.
•
Electrical connection, installation, start‑up, operation and maintenance must be carried out by specialized personnel only.
• The specialized personnel must have read and understood the instructions in this manual and should adhere to them.
• User serviceable connections are all accessible inside the enclosure.
• Do not operate or energize the instrument with the case open.
• Before powering the controller, verify wiring has been done properly.
• Always disconnect the instrument from power when making electrical connections.
• Do not run other cables through the same cable gland with the power cable.
• A clearly marked disconnect switch must be installed in the vicinity of the instrument to ensure that the electrical circuit
is completely de‑energized for service or maintenance.
• Do not operate damaged instruments which could pose a danger.
• Damaged instruments should be clearly marked as faulty and replaced.
• If faults cannot be repaired, the instrument must be taken out of service and secured against unintentional start‑up.
Built‑in Safety Features
• All electrical connections enclosed in an IP65 rated enclosure
• Galvanic isolation for all inputs and outputs
• EMC (electromagnetic compliant) hardware and software design
Notes:
• If system faults or a power failure occurs, a fault-signaling contact triggers the alarm.
• The HI520 controller has been tested for EMC in industrial use according to radiated emissions.
• Wiring or wiring changes (i.e. Probe, Relays, RS-485 communication port, Inputs, Outputs) must be carried
out after the controller has been turned off from power.
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