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--- apc_bat_conf [2020/09/11 16:33] – created chris
+++ apc_bat_conf [2020/09/11 16:38] (current) – chris
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-How to claibrate APC after battery changed
+**How to claibrate APC after battery changed**
+If you have changed your APC battery you might need to re-calibrate your batteries. This is to ensure to display and calculate the correct remaining time of the battery. To do a battery calibration do the following:
+  * To avoid surprises (just in case) take the server off-line by stopping the array.
+  * In the UPS settings you then stop the APCUPSD daemon (service apcupsd stop), and apply.
+  * Assuming that you have a keyboard and monitor attached to your server, at the command line you then run "apctest". (or you can run from a remote login)
+  * That utility offers a number of options such as self-test frequency, audible alarms on or off, etc.  Not all functions are supported by all UPSs.
+  * Provided that the UPS thinks the batteries are fully charged you can then run the calibration option.
+  * It will then automatically disconnect the load from the mains and run it from the UPS until the batteries are almost empty.
+  * Just before they are exhausted it should reconnect back to the mains and the batteries will then start to recharge.
+  * Exit the command line session and restart the daemon before you restart the unRAID array.
+That's all there is to it.  The UPS status report should then reflect the updated battery condition and estimated run time.
+\\
+\\
+Enjoy,\\
+\\
+**Your ArtIT Team**
+\\
+\\
+**[[linux|BACK]]**