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1760
Users Manual
6-28
garmin-settiings.bmp
2. Put the GPS receiver in a location with clear view to the sky.
3. Connect the GPS-receiver to the Instrument 25-pole feature connector on top.
4. Power on the Instrument. The instrument checks if there are NMEA data
available. If yes it corrects the internal time. The internal time is taken for
measurements.
5. The Pulse LED on the Instrument will start to blink at the reception of
synchronization pulses. For LED functions see LEDs Time Sync.
Handling of Date/Time in the Instrument
There are two ways for changing date/time:
• Hard change: Date/time (used for timestamps of measurement values) are set to
the actual time immediately.
• Soft change: Measurement date/time are accelerated or decelerated by a small
amount until the real-time is reached.
Changing Date/Time: No Measurement is Active
When no measurement is running, then time changes by GPS or software are always
performed immediately.
Changing Date/Time during a Measurement
During a measurement only soft time changes can be done.
When the GPS signal becomes available during a measurement, then the system time is
set immediately and the measurement time adapts slowly (±0.01 %) to the new system
time. This provides a correction of max. 8.64 seconds per day. The error for the power
frequency measurement is <0.005 Hz at 50 Hz and <0.006 Hz at 60 Hz (IEC61000-4-30
5.1.2 requires that the measurement uncertainty never exceeds ±0.01 Hz).
If you need to carry out a “hard” date/time change of the instrument via the software then
proceed as follows:
1. Download measurement data
2. Adjust date/time
3. Load current measurement settings: select Measurement-> Settings
4. Initialize a new measurement by pressing the Initialize button
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