Refractometer connections - PR53 - PR53AC - PR53AP - PR53GC - PR53GP - PR53M - PR53SD - PR53W

PR53 Series User Guide

Document code
M212898EN
Revision
E
Language
English
Product
PR53
PR53AC
PR53AP
PR53GC
PR53GP
PR53M
PR53SD
PR53W
Document type
User guide

The refractometer has built-in isolated 4–20 mA analog output channel, which represents the output of the refractometer. The output range and the engineering unit depend on the concentration curve used; for example, if the unit is configured with 0–100 °Brix output, the scaling of the output channel is 4 mA = 0 °Brix and 20 mA = 100 °Brix. The default error state indication level is 3.6 mA. The output is configurable: The output value (refractive index, temperature, concentration, quality factor), scaling, and error status indication level can be configured using the Vaisala Insight software and a USB adapter.

The connection header also has an RS-485 port. This allows using the refractometer directly as a Modbus RTU server device. Alternatively, the same port is used to connect the refractometer to an Indigo520 transmitter.

For digital communications, see Modbus RTU.

Figure 1. Connecting wires inside the refractometer (Modbus RTU or Indigo520)
Figure 2. Connecting wires inside the refractometer (analog output)