Configuring Data Logging

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The HPDU can store 120 measurements for each sensor in a memory buffer. This memory buffer is known as the data log. Sensor readings in the data log can be retrieved using SNMP.

You can configure how often measurements are written into the data log using the Measurements Per Log Entry field. Since the HPDU internal sensors are measured every second, specifying a value of 60, for example, would cause measurements to be written to the data log once every minute. Since there are 120 measurements of storage per sensor, specifying a value of 60 means the log can store the last two hours of measurements before the oldest one in the log is overwritten.

When measurements are written to the log, three values for each sensor are written: the average, minimum and maximum values. For example, if measurements are written every minute, the average of all measurements that occurred during the preceding 60 seconds along with the minimum and maximum measurement values are written to the log.

Note - The SNMP agent for the HPDU device must be enabled for this feature to work. Using an NTP time server ensures accurately time-stamped measurements.

Select Device Settings → Data Logging.
Note - By default, data logging is enabled. You must have the Administrator Privileges or Change PDU, Inlet, and Overcurrent Protector Configuration permissions to change the setting.
To enable the data logging feature, select Enable in the General Settings section.
Type a number in the Measurements Per Log Entry field. Valid range is from 1 to 600. The default is 60.

Verify that all sensor logging is enabled.

Caution - Although it is possible to selectively enable or disable logging for individual sensors on the HPDU, it is not recommended.

To enable all sensors, click Enable All at the bottom of the page.
To select all sensors of the same type, click Logging Enabled in the header row of each section.
If the number of sensors exceeds 35 in any section, the remaining sensors appear on next page(s). If so, a pagination bar displays in this section, on which you can click any button to navigate the pages.

Click Save at the bottom of the page.