Chronoskop CHR-9 Timegrapher
User manual
www.CHRONOSKOP.com
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5.2. Calibrating the Timegrapher
To calibrate the crystal frequency, start the calibration
directly from the main menu. After connecting the
receiver, the calibration starts automatically.
The following values are displayed:
•
Current quartz frequency
•
Measured pulse duration of the DCF77 signal [s] (ideally: 1,000 s)
•
Calculated quartz frequency
•
Accuracy achieved [s / year]
•
In the lower right corner, the number of pulses counted.
The accuracy of each second time signals is dependent of location and environmental
factors. Therefore the calibration should last at least one hour. It is recommended to calibrate
12 hours. The determined frequency and the deviation during the calibration is always
displayed on the screen. With the touch field “SAVE” the determined frequency can be
stored. This field will not appear until fairly good accuracy.
The device is calibrated before shipping. If measurement takes place in room ambient
temperature, a re-calibration is not necessary.
