Schneider Electric PM820, PM870, PM810, PM850 Maintenance and Troubleshooting, Power Meter Memory

63230-500-225A2	PowerLogicTM Series 800 Power Meter
3/2011	Chapter 10—Maintenance and Troubleshooting

Chapter 10—Maintenance and Troubleshooting

Introduction

This chapter describes information related to maintenance of your power meter.

The power meter does not contain any user-serviceable parts. If the power meter requires service, contact your local sales representative. Do not open the power meter. Opening the power meter voids the warranty.

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

•Do not attempt to service the power meter. CT and PT inputs may contain hazardous currents and voltages.

•Only authorized service personnel from the manufacturer should service the power meter.

Failure to follow these instructions will result in death or serious injury.

CAUTION

HAZARD OF EQUIPMENT DAMAGE

•Do not perform a Dielectric (Hi-Pot) or Megger test on the power meter. High voltage testing of the power meter may damage the unit.

•Before performing Hi-Pot or Megger testing on any equipment in which the power meter is installed, disconnect all input and output wires to the power meter.

Failure to follow these instructions can result in injury or equipment damage.

Power Meter Memory

The power meter uses its non-volatile memory (RAM) to retain all data and metering configuration values. Under the operating temperature range specified for the power meter, this non-volatile memory has an expected life of up to 100 years. The power meter stores its data logs on a memory chip, which has a life expectancy of up to 20 years under the operating temperature range specified for the power meter. The life of the internal battery- backed clock is over 10 years at 25°C.

NOTE: Life expectancy is a function of operating conditions; this does not constitute any expressed or implied warranty.

Date and Time Settings

The clock in the PM810 is volatile. Therefore, the PM810 returns to the default clock date/time of 12:00 AM 01-01-1980 each time the meter resets. Reset occurs when the meter loses control power or you change meter configuration parameters including selecting the time format (24-hr or AM/PM) or date format. To avoid resetting clock time more than once, always set the clock date and time last. The PM810LOG (optional module) provides a non-volatile clock in addition to on-board logging and individual harmonics readings for the PM810.

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