Dwyer CTF - Manual (Page 2)

Checking the Status of the Output
Depending on the configuration of the output defined by the user (PNP/ NPN) and the
mode of operation (Max/ Min), the output status indicated by the red LED on the top
of the housing will vary.
Low (Min) Mode: The tuning fork level switch starts detection 3 seconds after power
is connected. The switch will remain open and the red LED indicator will remain off
until covered by a medium. Once the tuning fork is covered by this medium, the
vibration will cease, the switch will close, and the red LED will turn on.
High (Max) Mode: The tuning fork level switch starts detection 3 seconds after power
is connected. The switch will remain closed and the red LED indicator will remain on
until covered by a medium. Once the tuning fork is covered by this medium, the
vibration will cease, the switch will open, and the red LED will turn off.
Magnetic Testing of Functionality
Once tuning fork level switch is installed and powered, the CTF offers a magnetic
switch test to check functionality. Depending on the proximity of magnet in relation to
the magnetic test point, the switch will change from open to closed or closed to open,
and the red LED will switch on or off depending on the mode configured. The purpose
of the test is to confirm the wiring and functionality are correct.
Installation
The following steps should be followed for both horizontal and vertical installation.
Horizontal Installation
Level switch can be installed in powder and liquid. Do not install near substance inlet.
When installed, the tuning fork position hole on DIN plug must be faced in the
downward direction. Fail to do so may damage the tuning fork.
Vertical Installation
When the level switch is installed in a a liquid, the opening of the two fork blades is to
be so the liquid flows between the blades.
Just as with horizontal installation, do not install the tuning fork near the substance
inlet.
MAINTENANCE/REPAIR
Upon final installation of the Model CTF, no routine maintenance is required. The
Model CTF is not field serviceable and should be returned if repair is needed. Field
repair should not be attempted and may void warranty.
WARRANTY/RETURN
Refer to “Terms and Conditions of Sales” in our catalog and on our website. Contact
customer service to receive a Return Goods Authorization number before shipping the
product back for repair. Be sure to include a brief description of the problem plus any
additional application notes.
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
©Copyright 2012 Dwyer Instruments, Inc. Printed in U.S.A. 12/12 FR# R4-444058-00 Rev. 3
Figure 3 - Max/Min Mode Output Status Indication
Figure 4 - Magnetic Test Diagram
Figure 5 - For proper operation, do not install near substance inlet.
Figure 6 - Position hole on DIN plug must be installed facing downward.
Figure 7 - Vertical installation in a liquid’s flow stream.
Figure 8 - Do not install tuning fork near substance inlet.
Figure 2 - NPN Output Connection Diagram