FineTek SC38 User manual

SC38 provides the function of customizing the operating point position in
accordance with what is required by the user.
Settings
1. Keep pressing the “Calibration Button” for 3 seconds. When the red and
green LED indicators flash in turn every 0.5 second, it enters the calibration
mode. Press the calibration button again to enter the Empty Bin Calibration
mode.
[Empty Bin Calibration]
2. Calibration status: The red LED indicator flashes every 0.5 second, and the
output current switches to operate every 0.5 second.
3. This mode is to calibrate the vibration frequency of the tuning fork in the air.
Thus, it shall press “Calibration Button” when the tuning fork doesn’t sense
any material. In this case, it will write the vibration frequency in the air, and
enter the operating point calibration mode.
[Operating Point Calibration]
1. Calibration status: The red LED indicator flashes every 0.25 second, and the
output current switches to operate every 0.25 second.
2. Cover the material to the desired operating point position under this mode,
and then press “Calibration Button”. It will be adjusted to the corresponding
operating point position according to the H/L setting of the S.G.
The piezoelectric component is used to drive the tuning fork and feedback
signal, which produces the resonation on the fork. When the fork comes into
contact with a material, it relies on the damping effect by covering the testing
material on the tuning fork which changes the frequency of the tuning fork. The
frequency is judged by the micro-processor in the circuit. The signal display
and output status are determined based on the conditions set by the user.
WORKING PRINCIPLE FEATURES
All-in-one design, 3/4" thread is suitable to the installation of a small tube
(SC38 series).
A maximum length of 3m for the ultra-extension type.
Sensitivity adjustment is available for different density of media.
3
(ρ ＞0 . 5 g/cm or ρ ＞0 . 7 g/cm )
High/low failure safe mode, safe and reliable.
Self-diagnosis can detect the fork abrasion
Switch delay function
Alarm indicators based on failure status or output status selected according
to the customer’s habits
Test button can be tested after the installation is completed
Calibration of the operation points for different density of media by the
customer if required
3
SC38 Multi-functional Tuning Fork Level Switch
(NPN/PNP Three-wire Type) Operation Manual
Power supply
Power consumption
Input protection
OVP
Max. measurement error
Hysteresis band
Storage temp.
Repeatability
Environment temp.
SPECIFICATION
DIMENSIONS
(Unit:mm)
-40~85°C
Reverse protection function
Overvoltage category III
Max. ±1 mm
0.5mm
Approx. 2 mm
15mA
10~55 Vdc
-40~85°C
-40~150°C
2
Max. 10000 mm /s (10000 cst)
Max. 5 mmf
Max. 40 Bar
IP 66/67
f6~10 mm
350mA, 55Vdc
Operating temp.
Particle size in liquid
General cable
Material viscosity
Operating pressure
Protection grade
Contact capacity
1/2"PF
3/4"PT
Hex38
f84
107
L
40
17
Calibration Button
SC381SC380 SC382
75
120
120~3000
75
120
17.4
17.4
17.4
120
120
120~3000
120
Common Type
High-Temperature Type
SC381SC380 SC382
SC380
PANEL AND ELECTRICAL
Abbr.
Function
Test
Test Bottom
Options description
Reverse the signal output
F.S. Fail Safe MAX: High
MIN: Low
D.T. Delay Time S: Default setting
L: Delay for 5 second
S.G.
S.I.
Specific Gravity
Signal Indicator
H: ³0.7 g/
L: 0.5 g/
3
cm
3
cm³
F.S.: Fail-Safe mode
O.S.: Output mode
Notes
It is for the test after the installation is completed.
It is for the high and low Fail-Safe mode.
SC38 provides Max./Min. operation modes, and has the corresponding
indicators and output status according to the functional settings and whether it
is covered by the material. The working status is detailed in the figure below.
13mm
※Operating point position:
Normal model
DESCRIPTION OF FEATURES
Covered by material: Approx. 0.5s
Not covered by material: Approx. 1.s
Switch to L to set it as 5 seconds for being covered or not covered by the material.
The switch to set the material density.
Turn ON/OFF the red indicator based on the output status or the fail-safe status.
OUTPUT STATUS DESCRIPTION OF TEST BUTTON
This button is mainly provided for the user to check whether the output
operation works normally after the installation is completed. When the button is
pressed, the output and indicator (ON<->OFF) will be reversed. Once the
button is released, it will recover the original status.
The position of the SC38 fork trigger point depends on the mounting position
as shown in the figure below: (When the testing medium is water, S.G.=1
3
g/cm , temperature 23°C, and working pressure 0 Bar ). If the testing medium
3
has an S.G lower than 1g/cm , the trigger point would rise. Similarly, the trigger
point will move downward while the S.G is larger than that of water. The
moving range is depended on the S.G
FORK TRIGGER POINT
FUNCTION OF SELF-SET OPERATING POINT POSITION
Calibration
model
Empty
bin calibration
Operation point
calibration
ENVIRONMENT/MEDIUM TEMPERATURE LIMITATION
L
R=External Load
U max. 55Vdc@I max. 350mA
R
10~55 Vdc
Fuse
50mA
NPN: L- L+ O/P GND
PNP: L+ L- O/P
PWR SIG
F.S.
MAX
MIN
D.T.
S
L
S.G.
H
L
S. I .
O.S.
Test
SC38
F .
S.
U 10...55VDC
-
Top Mounting
MAX
MIN
O.S.
F.S.
O.S.
F.S.
O.S.
F.S.
O.S.
F.S.
:ON :Flash :OFF
I : Load currentL
Over Load(IL>350mA)
<100mA
<100 Am
<100 Am
IL
IL
Instrument failure <100 Am
Material Level Output Signal Failure Mode LED Indicator
: Temp. range for the common type
: Temp. range for the high-temp. type installed with the external
radiating pipe.
Ta
150LC
(300LF)
Tp
90LC
(194LF)
-40LC
(LF)-40
-40LC
(-40LF)
Ta
Tp
0LC
(32LF)
85LC
(175LF)
50LC

The product can detect the high/low level of the medium in the tank or the tube, which is applicable to various liquids, such as in the food or pharmaceuticals
industry.
PRODUCT APPLICATION
5. When installing, enough space should be left for wiring and calibration.
4. The protective tube should be installed when the liquid fluctuates
frequently.
3. When installing the standard tuning fork, please make sure it is in flush
with the sidewall.
08-SC38F-B0-EM,10/16/2015
Tel [phone]
Email: [email protected] http://www.fine-tek.com
: Fax: [phone]
No.16, Tzuchiang St., Tucheng Industrial Park, New Taipei City 23678, Taiwan.
FineTek Co. , Ltd.
Horizontal Installation:
1. Don’t install it near or around the material inlet.
INSTALLATION INSTRUCTIONS
2. When installing, adjust the cable gland to face downward. If the aligning
hole is not installed upward, the floating material in the bin may squeeze
the tuning fork, which will possibly cause product failure.
Vertical Installation:
1. It is installed in the tube filled with liquid, and it shall keep consistent with
the liquid’s flowing direction in the middle between two triggers.
2. Don’t install it near or around the material inlet.
Inlet Aligning hole
Aligning hole
Aligning hole
Aligning
hole