YOKOGAWA YS80 Series Manual

Technical
Information
Yokogawa Electric Corporation
Sale of the YS80 Series began in January of 1981, with over 1,200,000 units have been shipped since.
Some units have been in operation for a long period of time, and we have been having customers perform re-
placement with the YS80 Style E or YS100 Series for those that have been in use for many years.
Also, sale of the YS100 Series began in January of 1991, so it has been over twelve years since the first items
were shipped, and it is now nearing the time in which preventive maintenance is required.
Various directions can be considered for these instruments that are in operation, according to the situation of
the customer: replacement with the latest version of or successor models, shift to system instrumentation, or
continued use in the current state. But whatever the situation, it is necessary to maintain high reliability while
they are in operation.
Examples of the wear-out failure mode which is known as the bathtub curve include parts with a lifetime, such
as aluminum electrolytic capacitors, as well as parts such as switches with electrical contacts. At the design
stage, the YS Series utilizes parts that have high reliability and a long lifetime, but there are some parts for
which long-term deterioration due to the frequency of use cannot be avoided, as well as parts which deteriorate
due to the operating environment, etc. Leaving such deteriorated parts as they are may lead to serious prob-
lems due to instrument malfunction. Problems believed to be due to the neglect of preventive maintenance also
occur.
In light of such precedents, it is recommended that preventive maintenance required to maintain reliability be
performed at regular intervals for parts which have a lifetime.
Please contact our Service Department regarding preventive maintenance.
Preventive Maintenance for Parts with a Lifetime
It is recommended that the parts given in the following table be replaced at regular intervals.
Item Major Applicable Models Recommended Replacement
Intervals Notes
Fuse
Aluminum Electrolytic
Capacitor
Backup Capacitor
Fan
Battery
Fluorescent Display Tube
Replay
Fluorescent Tube
Servo Motor
Liquid Crystal Display
∗: ExceptYS110
Slide Switch,
Micro Switch
AllYS80 models
SDND
AllYS100 models(*)
SDND*A
AllYS models
SLPC, etc. 1 year, in non-energized state
SLPC, etc.
SKYD, SALD etc.
AllYS100 models(*)
SRVD, SRHD
AllYS100 models(*)
AllYS80 models
(except Style R) Differs according to the environment and frequency of use.
3 years
Replece every 8
years without fail.
10 years
3-5 years
5-10 years
5 years in
energized state
3-5 years
600,000
operations
2 years
3-10 years
7 years
Prevents wire breakage caused by element
deterioration.
Vendor-site replacement.
Prevents fluid leaks and capacity drop.
Equivalent to 10 years at a frequency of 1
operation every 10 minutes.
Accoding to the degree of deterioration in
brightness.
According to the degree of deterioration in
brightness.
Accoding to input vibration, etc.(Bearing wear)
Accoding to the degree of contrast decrease.
5-10 years
YS Series
Preventive Maintenance
TI 1B4Y04-01E
TI 1B4Y04-01E
© Copyright June 2004 (YK)
1st Edition June 2004(KP)

2
TI 1B4Y04-01E June 1, 2004
All Rights Reserved. Copyright © 2004,Yokogawa Electric Corporation
Subject to change without notice.
(*1) indicates items to which preventive maintenance replacement applies.
Cond. indicates items to which preventive maintenance replacement applies according to instrument model
or custom specifications and style.
 indicates items to which preventive maintenance replacement does not apply.
() indicates items for which the part model name differs from others.
(*2) The part name “battery” indicates the backup lithium battery of the RAM (memory).
(*3) If the slippage of the SRHD intelligent recorder pen carriage shaft becomes bad and a servo error, etc., is
displayed, clean the shaft with alcohol. The use of lubricant may result in debris adhering, and become the
cause of reoccurrence of problems.
(*4) Adjust the contrast after replacing the YS100 Series liquid crystal.
YS Series Preventive Maintenance Parts
Instrument
Model Name Capacitors Fuse Relay Fan
Battery
(*2) Fluorescent DisplayTube Switches
Liquid
Crystal
Display
(*4)
Servo
motor
(*3)
Fluorescent
Tube
SRVD
SRHD
SIHM
SIHK
SLCD
SLPC
SMLD
SPBD
SMST
SMRT
ULDU
STED
SKYD
SALD
SDAU
SPLR
SIHF
SLMC
SBSD
SLCC
SLBC
STLD
SPCM
PTED
YS135
YS136
YS110
SPRG
YS170
YS150
YS131
SDBT
SDBS
SDND
SCIU
SISD
SIND
SDBU
SCMS
Recorder
Intelligent Recorder
Indicator Cond. Cond.
Cond.
Cond.
Cond.
Cond.
Indicator with Alarm
Indicating Controller
Programmable Indicating
Controller
Programmable Computing
Station
mV, Temperature and
Potentiometer Converter
EMF-and RTD-to-Pneumatic
Converter
Auto / Manual Station for SV
Setting
Auto / Manual Station for MV
Setting
Programmable Indicating
Controller with Pulse Width
Output
Manual Station
Standby Manual Station
Auto / Manual Station
Ratio Set Station
Loop Display Unit
Alarm Unit
mV and Temperature Alam Unit
Digital Alam Unit
Programmable Computing Unit
Bar Graph Indicator with Alam
Batch Set Station
Blending Controller
Batch Controller
Totalizer
Pulse Computing Unit
Standby Manual Station
Programmer
Single-Loop Controller
Single-Loop Controller
Indicator with Alam
Distributor
Distributor
Power supply Unit
Communication Interface Unit
Isolator
Integrator
Distributor
( )
( )