Installing the unit with the display screen perpendicular to the ground reduces the effects of bubbles, and enables more stable operation.
The flow direction of the fluid can be switched by changing the menu settings. For more information about changing the settings, see page 7 of the instruction manual. The default flow direction is shown in the diagram below when the sensor is shipped from the factory.
Install the FD-MZ **ATK(P) Series so that the fluid flows upward. If the FD-MZK Series is installed so that the fluid flows downward, bubbles may appear, making it difficult to completely fill the pipe. This can cause the values to fluctuate and errors to appear on the display.
Arrange piping so that the sensor and surrounding pipes are always filled with the liquid.
Arrange piping so that gas will not enter it. When the fluid
contains bubbles, install the FD-MZK Series in a location where the
least amount of bubbles will occur.
L = At least 5 times longer than the bore diameter of the unit
* Make sure that the straight section of pipe that is directly connected to the inlet bore of the unit is at least 5 times longer than the bore diameter. (At least 20 times longer is recommended when turbulent flow occurs)
When installing joints to the FD-MZK Series, you must use a tool to hold the bore on the installation side of the unit. Holding the body or the bore on the other side of the FD-MZK Series may cause damage to the unit.
Use a tightening torque that is less than the value listed in the table below.
If fluid leaks from the pipes even when using the torque shown above, do not attempt to tighten the joints further. Instead, check for flaws in the threaded portion or sealing tape.
An excessive stress or vibration on the FD-MZK Series may cause damage or unstable operation.
Do not pipe the FD-MZK Series to correct the axis shift. Doing so applies an excessive stress to the bore.
When the axis shift cannot be corrected, use a flexible pipe or
similar to connect the pipe so that the stress is not applied to
* Make sure that the straight section of the pipe that is directly connected to the inlet bore of the unit is at least 5 times longer than the bore diameter. (At least 20 times longer is recommended when turbulent flow occurs)
Secure the connected pipes to other equipment so that the pipe load
is not directly applied to the FD-MZK Series. Vibration and stress
can be reduced by securing the connected pipes to other
equipment. The secured positions of the pipes should be as close to the bores of the FD-MZK Series as possible.
Be careful not to cause axis shift when securing the pipes. When vibration and load (stress) cannot be reduced, secure in two or more places.
KEYENCE CORPORATION has confirmed that this product complies with the essential requirements of the applicable EC Directives, based on the following specifications. Be sure to consider the following specifications when using this product in the Member States of European Union.
• Applicable Standard
EMI: EN61326-1, ClassA
• Use the FD-MZK Series with a ferrite core (OP-84289) attached to the input and output cable.
Attach the ferrite core at a position within 60 mm (2.36"), from the FD-MZK Series by winding the cable once as shown in the diagram.
These specifications do not provide any guarantee that the end-product with this product incorporated complies with the essential requirements of EMC Directive. The manufacturer of the end-product is solely responsible for the compliance on the end-product itself according to EMC Directive.