Nut upsuser - Apr 2013 - CP1000PFCLCD really high output voltage

Hi!  I just installed a new CP1000PFCLCD (Cyber Power PFC Sinewave UPS) and
everything appears to be working correctly, except that I have an oddly high
output voltage reading from nut. All of the other values seem consistent with
what the front-panel LCD says except for this one.

Is this something that needs a correction factor, or perhaps the value the
driver is reading has been remapped?  BTW, the value has moved from a low of 136
to a high of 142.  So it seems to be measuring *something* that fluctuates!  :)

battery.charge: 100
battery.charge.low: 10
battery.charge.warning: 20
battery.mfr.date: CPS
battery.runtime: 2790
battery.runtime.low: 300
battery.type: PbAcid
battery.voltage: 16.0
battery.voltage.nominal: 24
device.mfr: CP1000PFCLCD
device.model: CRDA103*AF1
device.serial: CPS
device.type: ups
driver.name: usbhid-ups
driver.parameter.pollfreq: 30
driver.parameter.pollinterval: 2
driver.parameter.port: auto
driver.version: 2.6.3
driver.version.data: CyberPower HID 0.3
driver.version.internal: 0.35
input.transfer.high: 139
input.transfer.low: 88
input.voltage: 119.0
input.voltage.nominal: 120

Really high --> output.voltage: 136.0

ups.beeper.status: enabled
ups.delay.shutdown: 20
ups.delay.start: 30
ups.load: 12
ups.mfr: CP1000PFCLCD
ups.model: CRDA103*AF1
ups.productid: 0501
ups.realpower.nominal: 600
ups.serial: CPS
ups.status: OL
ups.test.result: No test initiated
ups.timer.shutdown: -60
ups.timer.start: -60
ups.vendorid: 0764

On Apr 5, 2013, at 12:03 PM, jalano wrote:
> battery.voltage: 16.0
> battery.voltage.nominal: 24
^ This also seems a bit odd.
> Really high --> output.voltage: 136.0

The problem with correction factors is that we need to know how to apply them.
Most of the other corrections are obvious scaling errors (e.g. multiplying by
100,000,000). Smaller corrections may be temperature-dependent.

Here's the line in drivers/cps-hid.c:

  { "output.voltage", 0, 0, "UPS.Output.Voltage", NULL,
"%.1f", 0, NULL },

There is, of course, a non-zero chance of a bug somewhere in the driver, but
most of the other HID subdrivers use "UPS.Output.Voltage" as well.
Assuming NUT is parsing this value correctly, it should show up in the vendor
software. Can you try loading the software in a VM?

-- 
Charles Lepple
clepple at gmail