User Manual - P series
18
www.georgin.com
6.
Type C adjustment : electrical operation instrument with two offset switches
VG:
RG:
IG:
IE :
RE:
VE:
ES:
LP:
LE:
C:
Range adjustment screw
Range spring
Range index
Dead band and offset index
Dead band adjustment and offset spring
Dead band adjustment and offset screw
Sensing element
Flexible arm
Dead band arm
Switch
6.1. Procedure C1 : Single instrument
Example: Set the first threshold to 5 bar downwards and the second threshold to 6 bar upwards.
6.1.1. Set the first LP switch threshold.
1. Fully loosen screw VE.
2. Raise the pressure to the first threshold (5 bar) and stabilise it.
3. Using set point adjustment screw VG, relax range spring RG until switch(es) C changes state.
4. Retighten and stop at the exact point where the first threshold is triggered (LP contact).
6.1.2. Set the second HP switch threshold.
5. Raise the pressure to the second threshold (6 bar) and stabilise it.
6. Fully extend spring RE.
7. Using dead band adjustment screw VE, relax dead band spring RE until the exact point when the second
threshold (HP switch) is triggered on the way up.
6.1.3. Checking/adjusting thresholds
8. Slowly raise the pressure, and then slowly lower it again. Measure the desired thresholds.
9. Fine-tune the settings using screws VG (1st threshold, LP control) and VE (2nd threshold, HP control).
10. Disconnect the instrument from the bench.
11. Apply a seal to adjustment screws VG and VE using a Georgin seal kit (torque: 1.7 N∙m ±10%).
12. Close the cover and tighten the two captive screws (torque: 1.2 N∙m).
