PSL MicroPMU User manual

Revision 2.0
Power Standards Lab 980 Atlantic Ave, Alameda CA 94501, USA
Tel ++1-510-522-4400 Fax ++1-510-522-4455 www.powerstandards.com
Background
After April 6th, 2019, when the microPMU is powered off and back on, reconfigured, or rebooted, the
micro-synchrophasor measurements will be time-stamped with the wrong date and time and report the
year as 1999, instead of the present UTC date and time. The problem will not show if the microPMU is
left powered on and not restarted.
All microPMU devices will need to have firmware 3.7.319.04.25 or above installed regardless of whether
they exhibit this symptom. The minimum required firmware can be retrieved from the download center
of the PSL website (https://www.powerstandards.com/download/psl_firmware_3-7-3-19-04-25/).
How to Install the Fix
Step 1:
First check the time reported by the microPMU. This can be done through the display screen of the
device.
From the home screen of the display, tap on System, then Date/Time (examples below).
If the time reported reflects today’s date, apply the firmware update via USB (see the microPMU
Instruction Manual for details on applying the firmware file). Otherwise, continue to the next steps.
Once the firmware update is complete and the device has rebooted, verify the firmware version number
reported by the device matches version number in the name of the update file. Also make sure the
reported date/time is reflecting today’s date.
MicroPMU GPS Time Synchronization Issue
Recovery Procedure

Revision 2.0
Power Standards Lab 980 Atlantic Ave, Alameda CA 94501, USA
Tel ++1-510-522-4400 Fax ++1-510-522-4455 www.powerstandards.com
Step 2:
If the microPMU’s time does not reflect today’s date, the device time must be set manually before
applying the firmware upgrade.
NOTE: Physical access to the microPMU will be required for these next steps. If physical access is not
possible, please use the contact information at the end of this document to reach out to PSL support
before continuing.
Step 3:
Shut down the microPMU device. To completely shut down the device, send a reboot command using
the display screen.
From the display’s home screen, tap on Actions, then Reboot and confirm with the ‘YES’ option.
About 30 seconds to a minute after sending the reboot command the display screen will go completely
white for a few moments (example image below).
Once this happens, remove the input power to the device (e.g. input power to PM1 module) to prevent
it from booting back up.

Revision 2.0
Power Standards Lab 980 Atlantic Ave, Alameda CA 94501, USA
Tel ++1-510-522-4400 Fax ++1-510-522-4455 www.powerstandards.com
Step 4:
After the device is shut down the MS1/GPS1 modules must be disconnected completely from the
microPMU hardware as seen in the example image below. If the hardware is DIN rail mounted, slide the
MS1 module toward the left so that it is no longer physically connected to the microPMU.
Step 5:
Reconnect input power to the microPMU device and download a copy of its current Setup.ini file via
USB (see the microPMU Instruction Manual for details on downloading the setup file).
The Setup.ini file must be manually edited with a text editor such as notepad. Copy and paste the below
text into the bottom of the microPMU’s Setup.ini file and save the changes to the file.
;----------------------------------------------------
[SNTP_Settings]
;----------------------------------------------------
Enable_SNTP=OFF
SNTP_Server=2.pool.ntp.org
; ------ Valid Values: 1 to 168 (1 week)
SNTP_Update_Interval_In_Hours=1
;----------------------------------------------------
[NTP_Settings]
;----------------------------------------------------
Enable_NTP=OFF
NTP_Server=north-america.pool.ntp.org
; ------ Valid Values: 1 to 168 (1 week)
NTP_Update_Interval_In_Hours=1

Revision 2.0
Power Standards Lab 980 Atlantic Ave, Alameda CA 94501, USA
Tel ++1-510-522-4400 Fax ++1-510-522-4455 www.powerstandards.com
Step 6:
Once the edit to the Setup.ini file for the microPMU has been made, upload the new file via USB (see
the microPMU Instruction Manual for details on uploading the setup file).
Once the microPMU boots up with the new Setup.ini file, from the display’s home screen tap on System
> Date/Time. On this screen tap to edit any one of year, month, day, until the date matches the current
year, month and day.
After making the edits, tap on the yellow home icon. This will prompt a message asking to confirm or
cancel the time change. Confirm with the ‘YES’ option and the microPMU will reboot itself.
Step 7:
Apply the firmware update via USB (see the microPMU Instruction Manual for details on applying the
firmware file).
Once the firmware update is complete and the device has rebooted, verify the firmware version number
reported by the device matches version number in the name of the update file.
Step 8:
Shut down the microPMU completely using the same instructions as given for the step before
disconnecting the MS1/GPS1 modules. After the device is shut down, physically reconnect the MS1 and
GPS1 modules and restore input power to the microPMU. Finally, check the date reported by the
microPMU reflects today’s date.
For any further questions or concerns please contact PSL at [e-mail] or by phone
at [phone].