Troubleshooting Messages; Table 9 Hardware Troubleshooting - Vaisala PR-23 Series User Manual

PR-23 Series User Guide
4. Hold down the decimal point key until the DTR has started completely and you see the
main display.
The reset on the display language is temporary and the language returns to original
next time the DTR is powered off, except if the language is permanently changed
through the display settings menu.
9.1.4 Troubleshooting messages
Table 9 Hardware troubleshooting
Problem
Message NO SENSOR
Message NO SIGNAL
Besides the message, the
concentration display is a dashed
line although a sensor is
connected.
92
Cause
The current in the cable to this
sensor is below 20 mA. Normally
this means that there is no sensor
connected to the cable or that
there is no cable to the DTR. If this
message comes up while a sensor
properly is connected, the most
likely cause of this message is a
fault in the sensor. It is also
possible that the cable is totally
dead for example if it is
accidentally cut through.
See also Diagnostic LED LD1/LD3,
Diagnostic LEDs (page 89). The
concentration display is a dashed
line.
The current in the cable to this
sensor is in the correct range
20 ... 60 mA, but no data is coming
in from the sensor. This indicates
that the Sensor processor card is
faulty.
See also Diagnostic LED LD1/LD3,
Diagnostic LEDs (page 89).
IM-EN-PR23-E
Corrective action
Replace the sensor processor card.