ULFA TECHNOLOGY SIT Series User manual

SIT/SDS Series DIGITAL DIFFERENTIAL PRESSURE SWITCH & TRANSMITTER
Copyright ⓒ 2003.08 ULFA TECHNOLOGY CO.,LTD http://www.ulfatech.com
1
Instruction Manual
(D igital D iffere ntial P re ssure S w itch & T ra nsm itte r)
1 . G e ne ra l S pe cifica tion
2 . Insta lla tion
3. W iring
4 . F unction
5 . S e tting & C a libra tion
4 Digit Display, 4-20mA Output. 2 Level Control

SIT/SDS Series DIGITAL DIFFERENTIAL PRESSURE SWITCH & TRANSMITTER
Copyright ⓒ 2003.08 ULFA TECHNOLOGY CO.,LTD http://www.ulfatech.com
2
General Specification
SIT/SDS Series pressure and transmitter are
measures positive and negative (vacuum)
pressure of liquid or non corrosive gases, and
for the variously choice of ranges available to
suit your needs precisely.
The SIT/SDS Widely used to Industrial
automation, Hydraulic control, Process control,
Oceanography, Plant utilities, Liquid level,
Water measurement, and many other
applications.. The SIT model has three
functions of gauge, switch and transmitter. And
SDS has two functions of gauge and switch.
SDS has two(2) SPDT relays for individual
level control. It is very easy to set control
level by front pad key.
Accuracy is +/-0.25% of full scale.
GENERAL
Maximum Pressure: Rated Range x 3
Media Compatibility: Air and non corrosive gas
Pressure Range: Refer to range table
ELECTRICAL
Power Supply: DC24V(100-.220VAC
50~60Hz)
Connections: 2 screw terminal block
Display: 4 Digit LED
W arm u p Tim e: 15 minutes
SWITCH
Relay Contact: 2 SPDT(NC - COM - NO)
Contact Rating: 1A@ 30VDC, 0.5A@125VAC
Connections: 6 Screw terminal block
Level setting: Individual level setting
Switch 1 & 2
TRANSMITTER(SIT)
Range Table
Connections: 2 Screw terminal block
Output Signal: 4-20mADC(limited at
30mADC)
Model No Range Resolution
Loop Resistance: 0 - 1100 Ω
Zero & Span Adj: One touch Adjustable on
Panel
-B300M ±300 mmH2O 1 mmH2O
PERFORMANCE AT 23 ℃(SIT)
-B1500M ±1500 mmH2O 1 mmH2O
Zero Output: 4 mA
-G3000M 0~3000 mmH2O 1 mmH2O
Full Span O utput: 20 mA
-B760H ±760 mmHg 1 mmHg
Accuracy:
±0.25 % FSO(Includes
Linearity, Hysteresis &
Repeatability)
-B01K ±1.000 kg/cm20.001 kg/cm2
-G07K 0~7.00 kg/cm20.01 kg/cm2
Operating Temperature: -10 to70 ℃
MECHANICAL
-G30K 0~30.00 kg/cm20.01 kg/cm2
Pressure Connections: 1/8" PT female
-G100K 0~100.0 kg/cm20.1 kg/cm2
Materials: Aluminum Case
-G300K 0~300.0 kg/cm20.1 kg/cm2
W eight 1.5kg
-G1000K 0~1000 kg/cm21 kg/cm2
STANDARD ACCESSARIES
We can apply to other user specification
(Pressure units and range)
Tow(2) 1/8" PT plugs for duplicate/ Snap ring
Mounting ring, four(4) mounting screws

SIT/SDS Series DIGITAL DIFFERENTIAL PRESSURE SWITCH & TRANSMITTER
Copyright ⓒ 2003.08 ULFA TECHNOLOGY CO.,LTD http://www.ulfatech.com
3
Installation Wirin
g
LOCATION : Select your site location , Clean and
dry, no shock and vibration, proper to the ambient
temperature and humidity in use.
MOUNTING
The SIT/SDS Series Digital Pressure Transmitter is
designed for direct mounting on pipe or other
locations.
You need prepare PT 1/4"(3/8",1/2") female nut
on pipe or mounting locations.
CAUTION 1
You have to grab sensor housing by use
spanner to mounting and dismounting SIT/SDS
Do not hold SIT/SDS body and rotation for
mount and release.
CAUTION 2
Do not supply shock pressure to pressure port
POWER CONNECTION
The following procedures are to be used to install a
standard 24VDC main power source.
1. Before connection, the user must first confirm that
the power specification is DC24V or AC220V.
2. Verify that the facility's main power source is
turned off or disconnected.
3. Connect lead cable to power terminal matching
polarity as shown in FIG.2 below. Take care that
wrong wiring will damage the Instrument and
malfunction (AC220V is not concerned to polarity)
CURRENT OUT CONNECTION(4-20mA) (SIT only)
The SIT sends a standard 2 wire 4-20mA current
out
1. Connect lead cable to current out terminal
matching polarity as shown in FIG.2 below.
2.
Do not run the signal cable along with any high
voltage or power cable or put them in the same
race way. It may cause malfunction due to
induction.
FIG.1
FIG. 2
SWITCH OUT CONNECTION
SIT/SDS has two switches output. Each switch
operate individually and has A(normal open) and
B(normal close) contacts.
Caution : Do not use heavy load drive directly over
the switch contact rating.
Switch contact rating(resist load)
Normal Switching Capacity 1A 30V DC
0.5 A 125V AC
Max Switching Power 30W , 6.25VA
Max Switching Voltage 110V DC , 125V AC
Max Switching Current 1A

SIT/SDS Series DIGITAL DIFFERENTIAL PRESSURE SWITCH & TRANSMITTER
Copyright ⓒ 2003.08 ULFA TECHNOLOGY CO.,LTD http://www.ulfatech.com
4
Function Settin
g
and Calibration
Zero setting : Optimize display and current out to
zero automatically by front key pressed.
Peak pressure Measurement : This mode is
display for peak pressure by supplied pressure.
A
nd
the display is cleared by press enter key in the peak
mode.
Offset(△p) pressure Measurement : This
mode is display the changed pressure based on the
current pressure. Current pressure is turned into "0"
when offset mode selected. This mode does not
concern to 4-20mA current out put.
Sampling time setting : Sample rate is 0.1sec of
this product. Sampling time is measuring time by
sample rate. For example, if setting time is 2 sec,
SIT/SDS measures 20 times for 2 seconds and out
to display and 4-20mA out put by average of 20
times measured value.
Switch : SIT/SDS has two switches output. Each
switch operate individually and has A(normal open)
and B(normal close) contacts.
Transmitter(SIT) : SIT/SDS has 4-20mA current
out put. Span (20mA) range can be changed within
original range.
Communication(option) : Measurement pressure
can be sent by RS232 or RS485 for option
specification.
ID setting : This mode set identification number for
communication.
Over pressure warning : SIT/SDS displays
warning on segment for over pressure (positive and
negative). Upper 4 elements of 7segment("― ― ― ―")
blink for warning when measurement pressure over
10% for high pressure(factory setting value),
A
nd
under 4 elements of 7segment("_ _ _ _") blink for
warning when measurement pressure under 10% for
low pressure(factory setting value),
Factory setting recovery : The parameters are
changed all to factory setting value and all user
setting value is cleared.
Hear by describe key function and setting methode.
Please read this section carefully for the correct and
optimum use of this product.
UP
DOWN
MODE
ENTER
PEAK
P
PEAK
P
PEAK
P
PEAK
P
PEAK
P
PEAK
P
Ke
y
functions
Peak mode
Offset mode
- Increase setting value
- Offset mode set/reset
- Decrease setting value
- Peak pressure mode set/reset
- Entering into the setting mode
- Setting item circulation
- Save setting value
- Clear peak value in the peak mode
- Release setting mode
Press the PEAK
(
down
)
key once to set peak
mode
"PEA" displayed like left
while press peak key
Press the ENTER to
reset peak value and
newly start
Press the PEAK
(
down
)
key once more to release
peak mode
Pressthe
△
P(UP)ke
y
onceto setoffset mode
"dELt" displayedlikeleft
while press
△
P key
Pressthe
△
P(UP)ke
y
P
PK
S1
S2

Copyright 2003.08 ULFA TECHNOLOGY CO.,LTDhttp://www.ulfatech.com
5
PEAK
P
PEAK
P
PEAK
P
PEAK
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PEAK
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PEAK
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PEAK
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PEAK
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PEAK
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PEAK
P
PEAK
P
PEAK
P
SIT/SDS Series DIGITAL DIFFERENTIALPRESSURE SWITCH &TRANSMITTER
Switch level setting
Press the MODE key once to change switch setting
level. The setting mode circulate <SW1 OFF ⇒ SW1
ON ⇒ SW2 OFF ⇒ SW2 ON> when mode key
press repeated. Switches can be use to below two
type by level setting.
(1) Hysteresis mode
(2) Window mode
CAUTION:
① On level = Off level : switch off
② It is necessary to differ On level and Off level
above 4digits.
Press MODE keyonce to
set sw1-off level.
S1 LED is on while into
the sw1-off level setting
mode
"1oFF" displayed like left
while press mode key in
the sw1-off level setting
mode
Set your switch level use
up/down key
Press ENTER once to
save and exit to measure
mode. Press ENTER for
more than 3 seconds to
save and exist in the
switch level setting mode
SWITCH1 OFF LEVEL
SWITCH1ONLEVEL
Press MODE keyto select
sw1-on level set mode.
S1,
△
P LED is on while
into the sw1-on level
settingmode
"1on" displayed like left while
press mode key in the
sw1-on level setting mode
Set your switch level use
up/down key
Press ENTER once to
save and exit to measure
mode. Press ENTER for
more than 3 seconds to
save and exist in the
switch level settingmode
SWITCH2 OFF LEVEL
Switch level setting
Press MODE keyto select
sw2-off level set mode.
S2 LED is on while into
the sw2-off level setting
mode
"2oFF" displayed like left
while press mode key in
the sw2-off level setting
mode
Set your switch level use
up/down key
Press ENTER once to
save and exit to measure
mode. Press ENTER for
more than 3 seconds to
save and exist in the
switch level setting mode
SWITCH2 ON LEVEL
Press MODE keyto select
sw2-on level set mode.
S2,PEAK LED is on while
into the sw2-on level
settingmode
"2on" displayed like left
while press mode key in
the sw2-on level setting
mode
Set your switch level use
up/down key
Press ENTER once to
save and exit to measure
mode. Press ENTER for
more than 3 seconds to
save and exist in the
switch level settingmode
User settingmode
Entering User setting mode : Pres
MODE key for more than 3seconds till appear "I n t"
on segment into the user setting mode. Press th
s
e
MODE key once in user setting mode to change
setting item. The setting item circulate " I n t " ⇒
" PoFS " ⇒ " P 4 " ⇒ " P20 " ⇒ " Id " ⇒ " FACt
" ⇒ " I n t " while mode key press repeated.
Each item setting methodesare refer to nextpages.
Save : If you complete your setting in the each
mode, Press ENTER once to save and exit to
measure mode.
Off level P On level
On level Off level P
P
PK
S1
S2
P
PK
S1
S2
P
PK
PK
S1
S2
P

SIT/SDS Series DIGITAL DIFFERENTIAL PRESSURE SWITCH & TRANSMITTER
Copyright ⓒ 2003.08 ULFA TECHNOLOGY CO.,LTD http://www.ulfatech.com
6
User settin
g
mode Zero settin
g
Press ENTER for more than 3 seconds to save and
exist in the setting mode.
Release User setting mode :
Press ENTER once to save and exit to measure
mode.
If you are not operate this instrument for about 1
minute, It's released user setting mode automatically
and return to measuring mode.
Optimize zero to display and current out automatically
by front key pressed.
CAUTION : Release pressure port free before
zero set
Press MODE for more
than 3 seconds till sw1
LED is on and appear
"Int" on segment display
Press MODE key once
till appear "PoFS" on
segment.
Press ENTER once to
set zero and exit to
measure mode. "PoFS"
blink for about 5
seconds to calculate
zero.
Press ENTER key for
more than 5 seconds till
appear "SAvE" on
segment to save and
exist in the setting mode.
Sam
p
lin
g
time settin
g
It can be set 0.1~5.0 seconds by 0.1 sec resolution.
SIT/SDS reading pressure 0.1sec interval for a
setting time and calculate average pressure to
display and 4-20mA output.
(ex) setting time : 2 sec
SIT/SDS reading pressure 20 times for 2 seconds
and calculate average of measured 20 data to
display and 4-20mA current output.
This functions is useful to measure hunted pressure
Press MODE key for
more than 3 seconds till
sw1 LED is on and
appear "Int" on segment
display like left.
Release MODE key then
appear current set time
on segment display
(default set time is 0.5
sec)
Set your sampling time
use up/down key
Press ENTER once to
save and exit to measure
mode.
Press ENTER key for
more than 3 seconds till
appear "SAvE" on
segment to save and
exist in the sampling time
setting mode
4mA current settin
g(
SIT
)
This function is set pressure level to 4mA current out.
Generally pressure zero is setting to 4mA current out.
By the way, negative pressure is setting in another
case. SIT/SDS can be set any pressure level to 4mA
current out between low and high pressure range.
Low and high pressure ranges are setting in factory.
Press MODE key for
more than 3 seconds till
appear "Int" on segment
display.
Press MODE key once
till appear "P4" on
segment.
Set your pressure level
to 4mA out use up/down
key
Press ENTER once to
save and exit to measure
mode.
Press ENTER key for
more than 3 seconds till
appear "SAvE" on segm
-ent to save and exist in
the setting mode
PEAK
P
PEAK
P
PEAK
P
PEAK
P
PEAK
P
PEAK
P
PEAK
P
PEAK
P
PK
S1
S2
P
PK
S1
S2
P
PK
S1
S2
P
PK
S1
S2
P
PK
S1
S2
P
PK
S1
S2
P
PK
S1
S2

SIT/SDS Series DIGITAL DIFFERENTIAL PRESSURE SWITCH & TRANSMITTER
Copyright ⓒ 2003.08 ULFA TECHNOLOGY CO.,LTD http://www.ulfatech.com
7
20mA current settin
g(
SIT
)
Recall to Factor
y
settin
g
value
This function is set pressure level to 20mA current
out, That is set span. SIT/SDS can be set any
pressure level to 20mA current out between low
and high pressure ranges.
Low and high pressure ranges are setting in factory.
Press MODE key for
more than 3 seconds till
appear "Int" on segment
display.
Press MODE key once
till appear "P20" on
segment display.
Set your pressure level
to 20mA current out use
up/down key
Press ENTER once to
save and exit to measure
mode.
Press ENTER key for
more than 3 seconds till
appear "SAvE" on segm
-ent to save and exist in
the setting mode
This function is recall to initial states of factory
out from unmatched user parameters that zero,
span etc.
Press MODE key for
more than 3 seconds till
appear "Int" on segment
display.
Press MODE key once
till appear "FACt" on
segment display.
Press ENTER once to
recall and exit to measure
mode.
Press ENTER key for
more than 3 seconds till
appear "SAvE" on segm
-ent to recall and exist in
the setting mode
ID No settin
g
ID number is use for address for communication to
master. It's concern to SIT/SDS communication function
installed.(option)
Press MODE key for
more than 3 seconds till
appear "Int" on segment
display.
Press MODE key once
till appear "ID" on
segment.
Set your ID No use
up/down key(0~255)
default set is 0.
Press ENTER once to
save and exit to measure
mode.
Press ENTER key for
more than 3 seconds till
appear "SAvE" on segm
-ent to save and exist in
the setting mode.
ULFA TECHNOLOGY CO.,LTD
344, industrial zone ,201 haan 3-dong
kwang myung-city, kyung ki-do
423-754 KOREA
TEL:[phone] FAX:[phone]
[email protected]
PEAK
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PEAK
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PK
S1
S2
P
PK
PK
S1
S2
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PK
S1
S2
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PK
S1
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PK
S1
S2
S1
S2
P
P