Connecting the refractometer wiring - PR53 - PR53GP

PR53GP Installation Guide
Document code
M212873EN
Revision
C
Language
English
Product
PR53
PR53GP
Document type
User guide
  • Cable gland or conduit hub
  • Cables
  • TX20 Torx key
  • 22‑mm wrench
  • 24‑mm wrench
WARNING Make sure that electrical connections adhere to local and state legislation and regulations.
WARNING Make sure that you prepare and connect only de-energized wires.
  1. Switch off all communications to the process.
  2. Loosen the bolts on the refractometer cover using a TX20 Torx key. Be careful not to drop the bolts.
  3. Remove the dust plug from the refractometer.
  4. Install the cable gland or conduit hub adapter.
    1. Tighten the upper part of the cable gland to 5 Nm using a 22‑mm wrench.
    2. Tighten the conduit hub adapter to 5 Nm using 24‑mm wrench.
  5. Install the cable with the cable gland or conduit hub.
    1. Feed the cable through the cable gland. Ground the cable gland by removing the 15‑mm sleeve from the cable, brushing the metal braid upwards and folding it over. Make sure the wires reach the terminal. Tighten the cable gland to 5 Nm using a 22‑mm wrench. Make sure the wires are not twisting.
    2. Feed the cable through the conduit. Make sure the wires reach the terminal. Tighten the conduit hub to 5 Nm using a 24‑mm wrench. Make sure the cables are not twisting.
      CAUTION If the conduit is metal, it grounds the cable at the refractometer side. If the conduit is not metal, use the SHIELD connection at the terminal block (shown in the figure). For the power side grounding, follow local regulations.
  6. Connect the wires inside the refractometer.
    1. Digital connection
    2. Analog, mA connection
  7. Reinstall the refractometer cover. Tighten screws to 2 Nm using a TX20 Torx key. Be careful not to overtighten. The screws may break.