Qualitrol INFORMA PMD-A, Руководство пользователя

Страница: 129 / 248

Maintenance
122
www.qualitrolcorp.com
• For every group change or type change, the earlier calibration values are lost.
Consider the following example:
Suppose the user has calibrated a few channels leaving all the others to “Undefined
Channels”. As a result, the next time the user configures and calibrates these
channels, the earlier calibrated values will be lost. In this condition, the user has to
save the earlier calibrated values and then proceed.
• The default frequency setting of the INFORMA PMD-A device is 50 Hz. If the user
wants to operate the device at 60 Hz, the device must be re-calibrated with a 60 Hz
frequency setting. The operating frequency can be changed by using the “System
frequency” drop-down menu as shown in Figure 6.2. When a frequency change
occurs, the device is restarted; the user must wait for the device to restart and then
proceed for calibration.
7.2. General Maintenance
7.2.1. Storage
•
Keep the original packaging intact. It might be required at a later stage for transport.
• Store the device in a dry room; maintain a temperature range of -30°C to +70 °C and a
maximum humidity of 95 %.
•
Keep the User Manual supplied with the device for future reference.
•
Protect the device against direct sunlight, heat, moisture, and mechanical impacts.
• If the unit has a battery, switch off the battery by using the switch that is available on
the UPS board during storage. Refer to Appendix E for more information.
7.2.2. Transport
• Only the original packaging guarantees proper protection against mechanical impacts.
•
Transport the device only in its original packaging.
•
Protect the device during transport against heat and moisture; maintain the
temperature range of -30°C to +70°C and maximum humidity of 95%.
• Protect the device against impacts and loads.
7.2.3. Routine Maintenance
This instrument is a solid-state electronic device and there are no adjustable or renewable
parts inside that require routine maintenance.
However, after the first commissioning, it is recommended that a calibration check be
performed every 5 years.