Initial check - PR-21-S

1. Check the wiring, see Electrical connections.
2. Connect the power. The power indicator light and the screen light up within a few seconds.
3. The Main display comes up, as shown in Figure 1.
4. In case the display shows a row of dashes, there is no corresponding sensor (for example in the figure above, upper left, there is no sensor A, only sensor B is connected). The diagnostic message is NO SENSOR for that sensor.
5. Check the serial number of the sensor at the upper right corner in the display.
6. For a connected sensor, the diagnostic message at start-up is Normal operation or NO SAMPLE if the process pipe is empty. If another diagnostic message is shown instead, see Diagnostic message priorities.
7. The TEMP value shows the current process temperature.
8. To check the value and the correct setup of the two mA output signals, select DESCRIPTION in the Main menu and then mA OUTPUTS in the Description menu, see Viewing system information.
9. If internal relays or switch inputs are used, you can check their settings through the Description menu, see Viewing system information.