Bühler technologies Nivotemp NT 64 Guía Rápida página 8

Nivotemp NT 64, Nivovent NV 74
NC contact /
NO contact
Top to bottom: green
yellow
red
blue
Any other order may result in malfunctions.
The level contacts are arranged per order specifications at the
factory but may later be moved along a 10 mm (0.4") grid. The
falling NC contact (NO) or falling NO contact (NC) contact
function may also be changed by turning the contact hous-
ings 180°. The housing has two arrows. The arrow pointing up
indicates the current contact function.
NOTICE
Only tighten the plastic screw at maximal 5 cNm!
Function NO:
NO contact with rising level
= NC contact with falling level
The contact logic assumes the level switch is installed in an
empty tank, i.e. it is only in the operating position once filled.
The reference point for the level switching point is at the
middle of the EASYJUST level contact.
NT64:
• Disconnect the voltage supply.
• Disconnect the plug.
• Unscrew the display housing with base and carefully pull
out the top along with the adapter plug and the contact
strip.
• Loosen and reposition the plastic screws on the contacts
(cm scale on the back of the contact strip). Minimum spa-
cing: 40 mm (1.6").
• If necessary, turn 180° to change the contact function.
• Tighten the plastic screws for fastening the contact.
Please note the maximum torque (max. 5 cNm).
• Slide the contact strip back into the protective tube and
screw on the plug base.
NOTICE
Ensure the seals are positioned correctly. Replace defective
seals immediately!
8 Bühler Technologies GmbH
Example:
Change-over
contact
white
black
1 Plug connection M3 with
2 Adapter plug
3 Plastic screws
4 Level contacts
5 Contact strip
NV74:
• Disconnect the voltage supply.
• Unscrew the filter cover and remove the filter element.
• Loosen the mounting screws and remove the filter case.
Function NC:
NC contact with rising level • Loosen the screws for the flange cover and remove the
= NO contact with falling level
• Disconnect the adapter plug from the contact strip and
• Loosen and reposition the plastic screws on the contacts
• If necessary, turn 180° to change the contact function.
• Tighten the plastic screws for fastening the contact.
• Slide the contact strip back into the protective tube.
• Reattach the adapter plug to the contact strip the right
• Fasten the flange cover incl. seal.
• Secure filter case, insert filter element and screw on filter
Ensure the seals are positioned correctly. Replace defective
seals immediately!
Example:
1 Filter cover
2 Filter element
3 Filter case and seal
4 Flange cover and seal
5 Plastic screws
6 Level contacts
7 Contact strip
plug base
cover with cover seal.
carefully pull the contact strip out the top.
(cm scale on the back of the contact strip). Minimum spa-
cing: 40 mm (1.6").
Please note the maximum torque (max. 5 cNm).
way. The markings on the adapter flange and the contact
strip must overlap.
cover.
NOTICE
6 Optional: Temperature
contact (TK), Pt100 or
4-20 mA output
7 Flange
8 Switching tube
9 Float
8 Optional: Temperature
contact (TK) or Pt100
9 Flange
10 Adapter plug
Example: Plug connection
11
M3 with plug base
12 Switching tube
13 Float
BX100020 ◦ 12/2017