Chapter 6 ____________________________________________________________ TroubleshootingVAISALA ________________________________________________________________________ 65CHAPTER 6TROUBLESHOOTINGThis chapter describes common problems, their probable causes andremedies, and contact information for technical support.Analog Output Error NotificationIf the device is unable to measure due to an error, the analog output willbe set to an error level. The default error level is 0 V, or another valuepredefined by the customer when ordering the device.You can change the analog output error level using the AERR command,see section Set Analog Output Error Indication Level on page 50.Solving Typical ProblemsYou can check the error message via the serial interface by using theERRS command. If you are unable to remove the errors, contact Vaisalatechnical support. See section Technical Support on page 66.Table 13 Troubleshooting TableProblem or Message Likely Causes and SolutionsMeasurement not working.any of the following errorsactive:- T meas error- RH meas error- Sensor(s) damaged or missing. Open the filterand check.- Check the supply voltage of the probe.- Check the output mode of the probe using serialline.Humidity measurementappears to be wrong.- Check for condensation on the probe andsensor.- Use the L command to check the currentlyapplied calibration correction.- Calibrate and adjust the probe (HMP110).- Calibrate the probe and change the sensor ifnecessary (HMP60).
