Ytc YT-2700 Series User manual

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SMART POSITIONER
YT-2700 SERIES
USER'S MANUAL
YTC V.1.03

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Table of Contents
Introduction 4
Manufacturer Warranty 4
Product Description 5
Main Features and Functions 5
Label Description 6
Suffix Symbol 6
Specification 7
Parts and Assembly 8
Dimensions 9
Installation 10
YT-2700L Installation 10
YT-2700R Installation 12
Connection 14
Connection - Piping 14
Piping Connection with Actuator 15
Connection - Power 15
Connection - Feedback Signal 16
Connection - Ground 16
Adjustment 16
Variable Orifice 16
Manual Button <EXH / SUP> 16
Option Modules PCB 17
Auto Calibration and Basic Operation 17
Button Description 17
Run Mode (RUN) 18
Auto Calibration (AUTO CAL) 18
Auto 1 Calibration 19
Auto 2 Calibration 19
Auto HF Calibration 20
Manual Mode (Manual) 20
Parameter Mode (PARAM) 21
Dead-Zone (dEAdZONE) 21
P-Value (KP1) 21
P2-Value (KP2) 22

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Introduction
D2-Value (Kd2) 22
PT-Value (PT1) 22
PT-Value (PT2) 22
KP_ and D_Value 22
Hand Calibration Mode (HANd CAL) 22
Zero-Point (PZ_ZERO) and End-Point (PZ_END) 23
Zero-Point (TR_ZERO) and End-Point (TR_END) 23
End-Point Ration for Valve (PE_TRIM) 24
Normal/Reverse Feedback Signal (TR_NORM/REV) 24
Valve Mode (VALVE) 25
Acting Adjustment (ACT) 25
Characteristics Adjustment (CHAR) 25
User Characteristics (USER SET) 26
Tight Shut Open (TSHUT OP) 26
Tight Shut Close (TSHUT CL) 26
Split Range Control (SPLIT) 27
View Mode (VIEW) 27
Error and Warning Code 28
Main Software Map 29

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Thank you for choosing YTC product. Each product is fully inspected after the production to offer you
the highest quality. In order to fully utilize the product, we strongly recommend users to read the
manual carefully and fully understood.
The manual should be provided to the end-user.
The manual can be altered or revised without any prior notice. Any changes in product's
specification, structure, and/or any components may not result immediate revised version
of the manual.
The manual should not be duplicated or reproduced for any purpose without any approval
from Young Tech Co., Ltd, South Korea.
Manufacturer Warranty
For the safety, it is imperative to follow instructions in the manual. It is not manufacturer's
liability for any damages which caused by users' negligence.
It is not manufacturer's liability for any damages or accidents which resulted by any alteration
or modification of the product and parts. If alteration or modification is necessary, please
contact the manufacturer directly.
Manufacturer warrants the product from the date of original retail purchase of the product for
eighteen (18) months, except as otherwise stated.
Manufacturer warranty will not cover the products that the product have been subjected to
abuse, accident, alteration, modification, tampering, negligence, misuse, faulty installation,
lack of reasonable care, repair or service in any way that is not contemplated in the
documentation for the product, or if the model or serial number has been altered, tampered
with, defaced or removed; damages that occurs in shipment, due to act of God, failure due to
power surge, and cosmetic damage. Improper or incorrectly performed maintenance or
report voids this Limited Warranty.
For detailed warranty information, please contact the corresponding local Young Tech Co.,
Ltd office or main office in South Korea.

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Product Description
YT-2700 Smart Valve Positioner accurately controls valve stroke, according to input signal of 4-20mA,
which is being input from the controller. In addition, built-in micro-processing operator optimizes the
positioner's performance and provides unique functions such as Auto calibration, PID control, Alarm,
and Hart protocol.
Main Features and Functions
1. YT-2700 series freezes at the last position when the input signal and/or supply pressure fails
without any additional accessories, such as lock-up valve or solenoid valve.
2. LCD display enables users to monitor the status of the positioner.
3. The positioner operates normally even if there are sudden changes in supply pressure and in
high vibration environment.
4. The method of Auto Calibration is very simple.
5. Due to the small size of the positioner, it can be installed on a small actuator.
6. Low air consumption level and low voltage use (8.5V) yield to lower operating cost. The
positioner is compatible with most of controllers.
7. Variable orifice can minimize the hunting occurrence and optimize operating condition.
8. Various sets of information can be interchanged by HART communication protocol between a
valve and a positioner.
9. Valve system becomes more stable by outputting analog feedback signal.
10. Various characteristics of valve can be adjusted – Linear, Quick open, and Equal percentage.
11. Tight Shut – Close and Shut-Open can be set.
12. PID parameters can be adjusted in the field without any additional communicator.
13. A/M switch can change the flow of the pressure, whether to send directly to actuator or to
operate by positioner.
14. Split range 4-12mA or 12-20mA can be set.
15. Hand calibration function can be set Zero and Span values.
16. It has IP66 protection grade.
17. Air filter regulator can be attached with only one linear nipple. It does not require extra
piping.
18. Epoxy polyester powder coating resists against the corrosion process.
19. Maintenance of the positioner is easy because of modularized inner structure.
20. Size is very compact.
Label Description

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Model Number: Indicates model name and any option (if any).
Explosion Proof: Indicates the protection grade.
Input Signal: Indicates current input signal range.
Ambient Temperature: Indicates ambient temperature for normal operation.
Supply Pressure: Indicates the range of supply pressure.
Ui, Ii, Pi, Ci, Li: See certificates for parameter values of intrinsically safe.
Serial Number: Indicates unique serial number.
T5/T6 34
Suffix Symbol
YT-2700 series follows suffix symbols as follows.
Specification

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Model YT-2700L YT-2700R
Acting Type Single Only
Input Signal 4~20mA DC
Minimum Current Signal 3.2mA(Standard), 3.8mA(Hart Included)
Supply Pressure 1.4~7kgf/cm2 ( 0.14~0.7 MPa )
Stroke 10~150 mm 45~90°
Impedance Max.460 Ohm/ 20mA DC
Air Connection PT 1/4, NPT 1/4
Gauge Connection PT 1/8, NPT 1/8
Conduit Entry PF 1/2(Standard), NPT1/2(Option)
Protection IP66
Explosion Proof ExiaIICT6/T5 <in progress>
Ambient Temperature Operating Temp:-30~85℃
Explosion Proof Temp: -30~60℃(T5)/-30~40℃(T6)
Linearity ±0.5% F.S.
Hysteresis 0.5% F.S.
Sensitivity ±0.2% F.S
Repeatability 0.3% F.S.
Flow Capacity 70 LPM
Air Consumption 0 LPM (sup=1.4K, idle status)
Output Characteristic Linear, Quick Open, EQ%, User Set (16 Point)
Vibration No Resonance upto 100Hz at 6G
Humidity 5-95% RH at 40℃
Communication (Option) HART Communication
Feedback Signal (Option) 4-20mA ( DC 10 - 30V )
Material Aluminum Diecasting
Weight 1.5 kg (3.3 lb)
Painting Epoxy Polyestere Powder Coating
* Tested under ambient temperature of 20℃, absolute pressure of 760mmHg, and humidity of 65%. Please
contact YTC for the more detailed specification.
* Explosion Proof certification is in progress. Please contact YTC for most current progress.

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Parts and Assembly
The structure of YT-2700L is as shown <Figure1>. The only difference between YT-2500L and YT-
2700R is the feedback lever.
PCB Cover
Feedback
Lever
Cover
Cover Sealing
Pilot Relay
Body
PCB
Cover
Main
PCB

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Dimensions

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Installation
Safety Warning
When installing a positioner, please ensure to read and follow safety instruction.
All input and supply pressure to valve, actuator, and other related devices must be turned
off.
Use bypass valve or other equipment to avoid entire system "shut down."
Make sure there is no remaining pressure in the actuator.
Tools for Installation
①Hexagonal wrench
②Screw drivers (+) & (-)
③Spanners for hexagonal-head bolts
YT-2700L Installation
YT-2700L should be installed on linear motion valve such as globe valve or gate valve using spring
return type of diaphragm or piston actuator. Before installation, be sure to check for following
installation components.
1) Proper bracket must be made in order to attach positioner on the actuator yoke. Please
consider following when making a bracket.
①Feedback lever should be leveled at 50% of the valve
stroke. (Refer to Step 7)
②Feedback lever connection bar of actuator clamp
should be installed at the positioner that the valve
stroke and numbers which indicated on the feedback
lever must be fitted. (Refer to Step 8)
2) Attach YT-2700L to the bracket, which was made in earlier
step, by using bolts. <Figure 2> Please refer to backside
of the product for size of the bolts. The standard size of
bolt is M8 x 1.25P, and other bolt sizes are available. Please contact YTC sales department.
3) Attach YT-2700L (with bracket) to the actuator yoke – DO NOT TIGHTEN COMPLETELY.

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4) Connect YT-2700L feedback lever to the actuator clamp. The gap on the YT-2700L
feedback lever is 6.5mm. The connection bar thickness should be less than 6.3mm. <Figure
3>
5) Connect air filter regulator to the actuator temporarily. Set supply pressure of the regulator
in order to position the actuator clamp at 50% of valve stroke. <Figure 4>
6) Insert connection bar into the YT-2700L feedback lever. The connection bar should be
inserted at the 50% point on the feedback lever, which would help to reduce hysteresis.
7) If connection bar does not point at 50% point, then adjust bracket or feedback link bar
position. Failure to position at 50% would lower
the linearity of the poistioner. <figure5>
8) Check valve stroke. The stroke numbers are indicated on the feedback lever. Position
connection bar at the number on the feedback lever according to the valve stroke. <Figure
6> To adjust, move the bracket or the connection bar.

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Note
After installing YT-2700L, operate the valve from 0% to
100% stroke by using air filter regulator on the
actuator. Both of 0% and 100%, the feedback lever
should not touch the lever stopper, which is located on the
backside of YT-2700L. <Figure 7> If the feedback lever
touches the lever stopper, YT-2700L should be installed
further away from the center of the yoke.
9) After the proper installation, tighten all of the bolts on the
bracket, the feedback lever, and the connection bar.
YT-2700R Installation
YT-2700R should be used for rotary motion valve, that is ball valve, butterfly valve using rack and
pinion, scotch yoke or complex type actuator, which its stem rotates 90 degrees. Before installation,
be sure to check for following installation components.
①YT-2700R main body
②Fork lever and lever spring
③1 set of bracket
④4 pcs of hexagon head bolts (M8 x 1.25P)
⑤4 pcs of M8 plate washer
YT-2700R Installation Example
Bracket Information
YT-2700R is supplied with standard bracket which would fit to actuator stem of 20mm. For other
height of the stem, please make brackets according to the different height.

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1) Attach bracketed YT-2700R to the actuator by using hexagon-headed and wrench bolts.
Size of the bracket hole is 6mm. When tightening bolts, please use spring washer or similar
for firm attachment to the actuator, so YT-2700R will not be affected by vibration or any other
impact.
2) Set rotation position of the actuator stem at zero point, “0%”. For a single type of actuator, it
is easy to check zero point, because the actuator stem is positioned at zero point when there
is no supply pressure. If double acting actuator is used, check actuator stem’s rotation
direction (clockwise or counter-clockwise) by supplying pressure.
3) Install the fork lever as shown below after setting actuator stem at zero point. Check the
direction of the actuator stem – clockwise or counter-clockwise. Installation angle of the fork
lever should be 45 degrees based on the linear shaft. For NAMUR shaft, the angle does not
matter.
4) After setting fork lever position, assemble lock nuts which are located on the bottom of the
fork lever. Make sure to set the height of upper fork lever between 6-11 mm, which is lower
than upper bracket height.
5) Attach YT-2700R to the bracket. Fix the clamping pin on the main shaft’s center of YT-
2700R and insert connection bar into the fork lever slot, so it can be locked to the fork lever
spring. This sets the alignment of the main shaft of YT-2700R and center of the actuator

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stem. Bad alignment of the main shaft and the actuator stem lowers YT-2700R’s durability,
because too much force will be on the main shaft of YT-2700R.
6) Tighten YT-2700R base and the bracket with hexagon-headed bolts and plate washer. It
is recommended to tighten four bolts after checking YT-2700R's position.
Connection
Connection - Piping
Note
To avoid entering moisture, oil, or dust into the product, please carefully make selection of
supply pressure compressor.
It is recommended to attach air filter regulator before supply port of YT-2700R.
Supply Pressure Condition
①Dry air with at least 10℃lower than ambient temperature.
②Avoid from dusty air. Filter can only sort 5 micron or larger.
③Avoid any oil.
④Comply with ANSI/ISA-57.3 1975(R1981) or ISA S7.3-1975(R1981).
⑤Not to be used beyond the range of 1.4 - 7 kgf/㎠(140 - 700 kPA).
⑥Set air filter regulator's supplied pressure 10% higher than actuator's spring range pressure.
Pipe Connection
①Make sure inside of pipe is emptied.
②Do not use pipeline that is squeezed or has hole.
③To maintain flow rate, use the pipeline that has more than 6mm inner diameter. (10mm outer
diameter)
④Do not use extremely long pipeline system. It may affect flow rate due to the friction inside of the
pipeline.
Piping Connection with Actuator
Single acting actuator
YT-2700 series single acting type is set to use OUT1 port. OUT1 port should be connected with

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supply pressure port from actuator when using single acting type of spring return actuator
Connection - Power
Note
Before connecting terminal, please make sure that power is off completely.
Use ring type terminal to protect against oscillation or other impacts.
YT-2700 series (except internal PTM type) must use DC 4-20mA. Minimum supply current
should be 3.2mA for standard YT-2700, and minimum 3.8mA should be supplied for YT-2700
with HART communication. The power should not exceed 24mA.
YT-2700 series with PTM option, separate power should be supplied to PTM. The voltage
should be between 9~27V and not exceeding 30V.
YT-2700 must be grounded.
Please use twisted cable with conductor section area 1.25 ㎟and that is suitable for 600V
(complying to the conductor table of NEC Article 310.) The outer diameter of the cable
should be between 6.35~10mm. Use shield wire to protect against electro-magnetic field
and noise.
Please do not install the cable near the equipments such as high-capacity transformer or
motor which creates noise.
Terminal box
Connection - Feedback Signal
1) Open product cover by opening 4 M4 bolts.
2) Loose terminal locking bolts of feedback signal for position transmitter on terminal plate.

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3) Insert cables through cable connector in YT-2700.
4) Use ring type when connecting terminals in order to lock completely.
5) Insert terminal bolts through the holes and lock them with (+) and (-) terminals on the terminal
plate. Tighten bolts with 1.5Nm (15 kgf/cm) torque.
6) Be sure the polarities of the terminals are properly connected.
Connection - Ground
1) Ground must be done before operating YT-2700.
2) Inside of the terminal box, locate ground terminal plate at the center of the terminal plate. Use
any type of ground terminal with the resistance less than 100hm.
3) Make sure to use ring type ground cable in order to lock them completely.
Adjustment
Adjustment - Variable Orifice
Hunting can be occurred when the actuator's volume is too
small. In order to prevent hunting, orifice can be adjusted. By
adjusting orifice, the flow rate of supply pressure to actuator can be
adjusted. To adjust, use (-) driver to control the orifice.
Adjustment – Manual Button <EXH / SUP>
By pressing <SUP> and <EXH> button, YT-2700 series can be manually operated without any input
signal. <SUP> button allows supply air to transfer to the actuator from positioner’s OUT1 port, and
<EXH> button allows air to exhaust air from the actuator to the atmosphere through the positioner.
By utilizing this function, the user can easily mount the positioner or check actuator.
Adjustment - Option Modules PCB (PTM/HART)
Position Transmitter (PTM), HART Communication (HART), or PTM+HART option can be installed
on standard YT-2700 series PCB.
Variable Orifice

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Please install the PCB modules as follows.
1) Open the cover and separate main PCB board from the
body.
2) Unlock 2 bolts on the bottom with PCB supports.
3) Insert 14-pints exactly and completely.
4) When HART option PCB is installed on the main PCB,
please remove the option jumper as shown below.
5) Re-install main PCB on the main body.
After installing PTM option board, please adjust TR_ZERO and
TR_END from HAND CAL mode in order to get accurate output values.
Auto Calibration and Basic Operation
Note
Following process will operate valve and actuator. Before starting Auto Calibration, please
separate valve from the entire system, so Auto Calibration will not affect entire valve process.
Button Description
Run Mode (RUN)
After power connection to YT-2700 series, following message will appear on LCD screen within 6
seconds.

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"RUN" indicates that YT-2500 adjusts valve stroke with receiving signals (4~20mA) and "PV"
indicates the process value. In RUN mode, the valve stroke continuously changes according to
the input signal. There are six types of display message in RUN mode
To change display, push <ESC> and <UP> at same time. The display will change in order
indicated above. If <ESC> and <DOWN> pushed simultaneously, the order will be displayed in
opposite order. By pressing <ESC>, the display will return to RUN Mode.
Auto Calibration (AUTO CAL)
Auto Calibration (Auto Cal) automatically calibrates YT-2300 in very simple manner. Auto Cal
process takes about 2~3 minutes, and the duration of the process varies upon the size of the
actuator as well. There are 3 types of Auto Cal.
* It is recommended to calibrate the positioner under AUTO2 when setting the system initially.
Auto 1 Calibration
Auto 1 Calibration is mainly used when YT-2700 has not been set. The parameter which needs to
be calibrated in order for valve system to operate, will be calibrated; however, KP, KI, and KD
values do not change.

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①After connecting power, "READY 6,5,4,3,2,1" message will be appeared on LCD screen.
②Push <ENTER> button for 6 seconds at RUN mode and AUTO CAL message will be appeared.
③Push <ENTER> and AUTO1 mode will be displayed.
④Push <ENTER> and AUTO1 will be started.
⑤After several minute, COMPLETE message will be appeared to indicate that AUTO1 calibration
has been completed.
Auto 2 Calibration
Auto 2 Calibration sets all of the parameter which needs to be calibrated in order for valve system to
operate. Auto 2 Calibration is recommended when YT-2700 is first installed on the valve system.
①After connecting power, "READY 6,5,4,3,2,1" message will be appeared on LCD screen.
②Push <ENTER> button for 6 seconds at RUN mode and AUTO CAL message will be appeared.
③Push <ENTER> and AUTO1 mode will be displayed.
④Push <DOWN> and AUTO2 mode will be displayed.
⑤Push <ENTER> and AUTO2 will be started.
⑥After several minute, COMPLETE message will be appeared to indicate that AUTO2 calibration
has been completed.
Auto HF Calibration

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Auto HF Calibration sets all of the parameters, like Auto 2; however, it is used for high friction valve
environment
Manual Mode (MANUAL)
MANUAL MODE is used to move valve stem manually. During MANUAL MODE, YT-2700 moves
valve strokes, not by input signal. The movement of the stroke does not affect YT-2700 saved data
values, and it just moves valve strokes up/down physically.
Parameter Mode (PARAM)