With IPHost Network Monitor you can run simple snmp requests against a Liebert device in your network.
lcUpsNominalOutputFreq
Liebert Ups Nominal Output Freq
1.3.6.1.4.1.476.1.1.1.1.9.5
The nominal output frequency. (Unit of measure: Hertz)
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IPHost Network monitor allows you to monitor lcUpsNominalOutputFreq on Liebert device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Liebert uninterruptible power sources right now.