Simtronics GD1 MK3 Operating Manual page 29

If the signal in step 20 was too noisy (outside ± 8
ppm*m), adjust slightly vertical or horizontal
alignment until the noise is reduced to an
21
acceptable level. Avoid reducing the signal
strength too much; a drop of 5 % in relative
transmission is fine.
When finished minimizing the noise, enter
22 Alignment mode, click "Done" and "Save" on the
following screen.
23 Verify that the GD1 enters Measuring mode.
Note! As a default the zero filter is activated, filtering any noise/measurement and outputting
4 mA on the analogue output as long as the measurement is below 7% FS.
GD1
Fine tuning finished!
Page 29 of 76 850-816926-EN R06