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JANUARY 2010 - TD 220a DEPLOYMENT GUIDE, RDCP600
1.9.2
Synchronization
The two RTCs are synchronized either when the time is adjusted or when the instrument enters
sleep mode between recording intervals. When an updated time is entered using the Date &
Time adjustment feature in the Control Panel or when connected to a PC using ActiveSync, the
updated time is entered into both the main and the backup RTC.
IMPORTANT! Please note the latter case using ActiveSync. If you use ActiveSync to access the
RDCP 600 file system from an external PC, ActiveSync will automatically synchronize the clock
of the RDCP 600 with that of the PC. This will lead to an incorrect time setting if the clock
within the PC is not correct.
Since the main RTC is more accurate than the backup RTC, the backup RTC is synchronized
with the main RTC at regular intervals when power is on. This occurs when the system enters
the low power
Sleep
mode in between recordings.
1.9.3
Manual Synchronization
The backup RTC has a maximum error of 1.53 minutes per month. It is therefore advisable to
synchronize the RDCP 600 clock system if the instrument has been switched off for a longer
time period before deployment. Use the Date & Time adjustment feature in the Control Panel
for this purpose. Accurate time bases may be found on the Internet.
1.10
Power Consumption
The average power drain for the current configuration, is given in the
Deployment Setup
main
page (scroll down almost to the end of the page to the
Resource use
section, see Figure 1-27).
Power consumption is an issue when powering the RDCP 600 from a battery.
In these cases care should be taken to limit current drain by using configurations that drain less
power.
