Sensor Selection; General; Selecting A Temperature Sensor; Setup For Other Functions - YOKOGAWA SC202G (S) User Manual

11-4. Sensor Selection

11-4-1. General

The inputs of the EXA transmitter are freely programmable for ease of installation. Standard 2-electrode
type sensors with a cell constant of 0.100/cm and a Pt1000 temperature sensor, need no special
programming. The EXA indicates a fault with a signal in the display field if there is a mismatch of sensors in
the connection.
11-4-2. Sensor selection
The EXA SC202 is pre/programmed to accept standard 2-electrode sensors with a Pt1000 temperature
sensor. The EXA is universally compatible with all 2- and 4-electrode type of sensors with a cell constant
within the range of 0.008/cm to 50.0/cm.

11-4-3. Selecting a temperature sensor

The EXA SC202 reaches its highest accuracy when used with a Pt1000 temperature sensor. This may
influence the choice of the conductivity/resistivity sensor, as in most cases the temperature sensor is
integrated in the conductivity/resistivity sensor.

11-5. Setup for other functions

Current Outputs
mA
●
Transmission signals for the measured parameters can be set up in service codes 30-39.
Diagnostic checks
●
Polarization check and checks on the calibrated cell constant and the adjusted Temperature Coefficient,
are included in the EXA SC202.
Communications
mA
●
The proprietary HART communication link allows remote configuration and data retrieval through the
PC202 communication package. This is an excellent tool for the maintenance engineer, quality engineer
or plant manager. Service codes 60 - 69 are used to set up the communications.
Logbook
●
In combination with the communications link, a "logbook" is available to keep an electronic record of
events such as error messages, calibrations and programmed data changes. By reference to this log,
users can for instance easily determine maintenance or replacement schedules.
Note:
On the pages 11-4 & 11-5 a reference list for the configuration of the SC202 is shown.
Appendix 11-3
IM 12D7B3-E-E