YOKOGAWA Y/11GM User manual

User’s
Manual Y/11GM
Pneumatic Gauge
Pressure Transmitter
IM 02C01B04-01EN
IM 02C01B04-01EN
12th Edition

i
IM 02C01B04-01EN
Y/11GM
Pneumatic Gauge
Pressure Transmitter
IM 02C01B04-01EN 12th Edition
CONTENTS
1. Introduction............................................................................................... 1-1
1.1 Safety Precautions............................................................................................ 1-2
1.2 Warranty............................................................................................................. 1-2
1.3 Control of Pollution Caused by the Product.................................................. 1-3
2. General ...................................................................................................... 2-1
2.1 Outline ................................................................................................................ 2-1
2.2 Principle of Operation ...................................................................................... 2-1
2.3 StandardSpecications................................................................................... 2-2
2.4 ModelandSufxCodes ................................................................................... 2-3
2.5 Options and Combinations.............................................................................. 2-4
2.6 Dimensions........................................................................................................ 2-5
3. Installation................................................................................................. 3-1
3.1 Transmitter Mounting ....................................................................................... 3-1
3.2 Typical Transmitter Piping ...............................................................................3-1
3.3 Air Supply and Transmission Piping .............................................................. 3-1
4. Operation................................................................................................... 4-1
4.1 Zero Adjustment................................................................................................ 4-1
4.1.1 Without Elevated or Suppressed Zero Range................................... 4-1
4.1.2 With Elevated or Suppressed Zero Range........................................ 4-1
5. Maintenance.............................................................................................. 5-1
5.1 Calibration Notes .............................................................................................. 5-1
5.1.1 Calibration Equipment ....................................................................... 5-1
5.1.2 Calibration Procedure ........................................................................ 5-1
5.1.3 To Change Range of Transmitter....................................................... 5-2
5.1.4 Flexure Cap Screw Adjustment .........................................................5-3
5.1.5 Overrange Stop Adjustment .............................................................. 5-3
5.2 Supply Air Filter................................................................................................. 5-4
5.3 To Clean Restrictor ........................................................................................... 5-4
5.4 To Clean Nozzle Assembly............................................................................... 5-4
5.5 To Remove Bellows Capsule........................................................................... 5-5
5.6 To Replace Bellows Capsule ...........................................................................5-5
5.7 To Clean or Replace Screens........................................................................... 5-5
5.8 ToRemovePneumaticAmplier..................................................................... 5-5
12th Edition: Apr. 2017 (YK)
All Rights Reserved, Copyright © 1982, Yokogawa Electric Corporation

ii
IM 02C01B04-01EN
5.9 Further Disassembly ........................................................................................ 5-6
5.9.1 Dashpot Removal .............................................................................. 5-6
5.9.2 Dashpot Alignment............................................................................. 5-6
5.9.3 To Remove Feedback Bellows and Zero Spring
(behind Zero Screw) ..........................................................................5-6
5.9.4 To Remove Back Flexures................................................................. 5-7
5.9.5 To Remove Force Balance Unit......................................................... 5-7
5.9.6 To Remove Relay Mounting Assembly.............................................. 5-7
5.9.7 To Remove Front Flexure .................................................................. 5-7
5.9.8 To Remove Force Bar........................................................................5-8
5.9.9 Flapper Alignment .............................................................................. 5-8
5.9.10 Bolt Tightening Procedure - Force Balance Unit ...............................5-9
Appendix1. 80APneumaticAmplier(PartNo.F9138YA) .........................A-1
A1.1 Principles of Operation ................................................................................... A-1
A1.2 CleaningthePneumaticAmplier ................................................................. A-1
A1.3 CalibrationProcedureusingCalibratingFixture ......................................... A-2
Customer Maintenance Parts List
ModelY/11GMPNEUMATICGAUGEPRESSURETRANSMITTER(StyleC)
..............................................................................................CMPL 02C01B04-01E
Revision Information

<1. Introduction> 1-1
IM 02C01B04-01EN
1. Introduction
Thank you for purchasing the Yokogawa’s
instrument.
The instrument is correctly calibrated at the factory
before shipment. To ensure correct and efcient
use of the instrument, please read this manual
thoroughly and fully understand how to operate the
instrument before operating it.
Regarding This Manual
• This manual should be provided to the end
user.
• The contents of this manual are subject to
change without prior notice.
• All rights reserved. No part of this manual may
be reproduced in any form without Yokogawa’s
written permission.
• Yokogawa makes no warranty of any kind with
regard to this material, including, but not limited
to, implied warranty of merchantability and
tness for a particular purpose.
• If any question arises or errors are found, or if
any information is missing from this manual,
please inform the nearest Yokogawa sales
ofce.
• The specications covered by this manual are
limited to those for the standard type under the
specied model number break-down and do not
cover custom-made instrument.
• Please note that changes in the specications,
construction, or component parts of the
instrument may not immediately be reected
in this manual at the time of change, provided
that postponement of revisions will not cause
difculty to the user from a functional or
performance standpoint.
Safety Precautions
• For the protection and safety of the operator
and the instrument or the system including
the instrument, please be sure to follow the
instructions on safety described in this manual
when handling this instrument. In case the
instrument is handled in contradiction to these
instructions, Yokogawa does not guarantee
safety.
• Yokogawa assumes no responsibilities for this
product except as stated in the warranty.
• If the customer or any third party is harmed by
the use of this product, Yokogawa assumes
no responsibility for any such harm owing to
any defects in the product which were not
predictable, or for any indirect damages.
• The following safety symbols are used in this
manual:
WARNING
Indicates a potentially hazardous situation which,
if not avoided, could result in death or serious
injury.
CAUTION
Indicates a potentially hazardous situation which,
if not avoided, may result in minor or moderate
injury. It may also be used to alert against unsafe
practices.
IMPORTANT
Indicates that operating the hardware or software
in this manner may damage it or lead to system
failure.
NOTE
Draws attention to information essential for
understanding the operation and features.

<1. Introduction> 1-2
IM 02C01B04-01EN
1.1 Safety Precautions
WARNING
• Instrument installed in the process is under
pressure. Never loosen or tighten the
process connector bolts as it may cause
dangerous spouting of process uid.
• During draining condensate or venting gas
in transmitter pressure-detector section, take
appropriate care to avoid contact with the
skin, eyes or body, or inhalation of vapors, if
the accumulated process uid may be toxic
or otherwise harmful.
Since draining condensate or bleeding
off gas gives the pressure measurement
disturbance, this should not be done when
the loop is in operation.
• If the accumulated process uid may be
toxic or otherwise harmful, take appropriate
care to avoid contact with the body, or
inhalation of vapors even after dismounting
the instrument from process line for
maintenance.
IMPORTANT
• Supply air must be clean and dry.
- Supply air (pressurized) must not be
dewed event at -40°C.
- Air lter with 5μm (0.0002 inch) of lter
element maximum opening shall be
recommended.
- Oil lter should be provided to remove oil
in the supply air.
• Maximum supply air pressure of transmitter
without xed pressure regulator (GAS or
NAS type) is 215 kPa. Should the pressure
exceed 215 kPa, it is possible to break the
pneumatic amplier, bellows etc.
• When weling piping during construction, take
care not to allow welding currents to ow
through the transmitter.
• Do not step on this instrument after
installation.
• Applying a leakag-detecting uid to the
instrument may damage the plastic parts
resulting from corrosion or cracking.
1.2 Warranty
The warranty shall cover the period noted on
the quotation presented to the purchaser at the
time of purchase. Problems occurred during the
warranty period shall basically be repaired free
of charge.
• In case of problems, the customer should
contact the Yokogawa representative from
which the instrument was purchased, or the
nearest Yokogawa ofce.
• If a problem arises with this instrument,
please inform us of the nature of the problem
and the circumstances under which it
developed, including the model specication
and serial number. Any diagrams, data and
other information you can include in your
communication will also be helpful.
• Responsible party for repair cost for the
problems shall be determined by Yokogawa
based on our investigation.
The Purchaser shall bear the responsibility for
repair costs, even during the warranty period, if
the malfunction is due to:
• Improper and/or inadequate maintenance by
the Purchaser.
• Failure or damage due to improper handling,
use or storage which is out of design
conditions.
• Use of the product in question in a location
not conforming to the standards specied
by the Yokogawa, or due to improper
maintenance of the installation location.
• Failure or damage due to modication or
repair by the party except Yokogawa or who
is requested by Yokogawa.
• Malfunction or damage from improper
relocation of the product in question after
delivery.
• Reason of force majeure such as res,
earthquakes, storms/oods, thunder/
lightening, or other natural disasters, or
disturbances, riots, warfare, or radioactive
contamination.

<1. Introduction> 1-3
IM 02C01B04-01EN
1.3 Control of Pollution Caused by the Product
This is an explanation for the product based on “Control of Pollution caused by Electronic Information
Products” in the People’s Republic of China.
产品中有害物质或元素的名称及含量
型号 部件名称
有害物质
铅
（Pb）
汞
（Hg）
镉
（Cd）
六价铬
（Cr(VI)）
多溴联苯
（PBB）
多溴二苯醚
（PBDE）
P10 Series
气动差压/压力变送器
壳体 × ○ × × ○ ○
膜盒组件 × ○ × × ○ ○
基板组件 × ○ × × ○ ○
电源连接线 × ○ × × ○ ○
○：表示该部件的所有均质材料中的有害物质的含量均在 GB/T26572 标准中所规定的限量以下。
×：表示至少该部件的某些均质材料中的有害物质的含量均在 GB/T26572 标准中所规定的限量以上。
环保使用期限：
该标识适用于 SJ /T11364 中所述，在中华人民共和国销售的电子电气产品的环保使用期限。
注）该年数为“环保使用期限”，并非产品的质量保证期。

<2. General> 2-1
IM 02C01B04-01EN
2. General
2.1 Outline
Model Y/11GM Pressure Transmitter is a force-
balance instrument that measures pressure and
transmits it as a proportional 0.2 to 1.0 kgf/cm2or
bar, 20 to 100 kPa, or 3 to 15 psi pneumatic signal.
F0201.ai
Figure 2.1 Outline
2.2 Principle of Operation
The pressure being measured is applied to a
bellows capsule. The force on the capsule is
transmitted through a exure to the lower end of
the force bar. The metal diaphragm seal serves as
both a fulcrum for the force bar and as a seal for the
pressure chamber. The force is transmitted through
the exure connector to the range bar which pivots
on the range wheel.
Any movement of the range bar causes a minute
change in the clearance between the apper and
nozzle. This produces a change in the output
pressure from the amplier to the feedback bellows
until the force on the feedback bellows balances the
force on the bellows capsule.
The output pressure which is established by this
force balance is the transmitted signal and is
proportional to the pressure applied to the bellows
capsule. This signal is transmitted to a pneumatic
receiver to record, indicate and/or control.
F0202.ai
Reducing tube
Air supply
Pneumatic
Amplifier
Range wheel
Output
Range bar
Feedback
bellows
Zero
adjustment
screw
Flexure
Bellows
capsule
Pressure
connection
Diaphragm seal
Force bar
Flexure connector
Flapper nozzle
assembly
Figure 2.2 Principle of Operation

<2. General> 2-2
IM 02C01B04-01EN
2.3 StandardSpecications
Span Limits:
Refer to Table 2.1.
Span is continuously adjustable within range
limits.
Range Limits *:
Refer to Table 2.1.
*: when lower range-value is other than zero,
optional kit for elevated-zero or suppressed-
zero ranges is installed.
Overpressure Limits:
Refer to Table 2.1.
Output Signal:
Refer to Table 2.1.
Accuracy(includeslinearity,hysteresisand
repeatability):
±0.5 % of span.
Repeatability:
0.1 % of span.
Dead Band:
0.05 % of span.
Air Supply Pressure:
140 kPa, 1.4 kgf/cm2or bar, or 20 psi.
Air Consumption:
0.5 m3/h at 0 °C, 101.3 kPa {1.033 kgf/cm2}
absolute (0.3 scfm).
Ambient Operating Temperature Range:
-40 to 120 °C (-40 to 250 °F).
Process Temperature Limits:
-40 and 120 °C (-40 and 250 °F) at capsule.
Mounting:
Bracket for nominal 50 mm (2 inches) horizontal or
vertical pipe.
Air Connection:
Tapped for JIS R1/4 or 1/4 NPT, whichever
specied.
Process Connections:
JIS Rc1/2, Rc1/4, 1/2 NPT, or 1/4 NPT female,
whichever specied.
Wetted Parts Material:
Process Connection Block: Forged JIS SUS 316
stainless steel.
Bellows Capsule: SUS 316L stainless steel.
Capsule Gaskets: Silicone elastomer.
Body Material:
Forged SUS 316 stainless steel. Not wetted by
process.
Connection Hardware:
JIS SCM435 chrome-molybdenum steel cap
screws and nuts through body and process
connection block.
Cover:
Cast aluminum, nished with gray polyurethane
paint. Gasketed for National Electrical
Manufacturers Association (NEMA) (USA) Type 3
weatherproof service.
ApproximateWeight:
5.3 kg (12 lb).
Table2.1Span,RangeandOverpressureLimits.
Capsule –M-calibration P-calibration bar-calibration
A
Span Limits 0.07 to 0.55 MPa 0.7 to 5.6 kgf/cm210 to 80 psi 0.7 to 5.5 bar
Range Limits -0.1 to 0.6 MPa -1 to 6 kgf/cm2-50 to 90 psi -1 to 6 bar
O. P. Limits 0.7 MPa 7 kgf/cm2100 psi 7 bar
B
Span Limits 0.14 to 1.4 MPa 1.4 to 14 kgf/cm220 to 200 psi 1.4 to 14 bar
Range Limits -0.1 to 2.4 MPa -1 to 24 kgf/cm2-15 to 350 psi -1 to 24 bar
O. P. Limits 3.5 MPa 35 kgf/cm2500 psi 35 bar
C
Span Limits 0.28 to 2.7 MPa 2.8 to 28 kgf/cm240 to 400 psi 2.8 to 27 bar
Range Limits -0.1 to 5.1 MPa -1 to 52 kgf/cm2-15 to 750 psi -1 to 51 bar
O. P. Limits 7 MPa 70 kgf/cm21000 psi 70 bar
D
Span Limits 0.7 to 6.8 MPa 7 to 70 kgf/cm2100 to 1000 psi 7 to 68 bar
Range Limits -0.1 to 10 MPa -1 to 105 kgf/cm2-15 to 1500 psi -1 to 100 bar
O. P. Limits 14 MPa 140 kgf/cm22000 psi 140 bar
E
Span Limits 1.4 to 13.7 MPa 14 to 140 kgf/cm2200 to 2000 psi 14 to 137 bar
Range Limits -0.1 to 20 MPa -1 to 210 kgf/cm2-15 to 3000 psi -1 to 200 bar
O. P. Limits 28 MPa 280 kgf/cm24000 psi 280 bar
Output Signal 20 to 100 kPa 0.2 to 1.0 kgf/cm23 to 15 psi 0.2 to 1.0 bar
Option Code Standard
Specications CAL-M CAL-E CAL-B

<2. General> 2-3
IM 02C01B04-01EN
2.4 ModelandSufxCodes
Model SufxCodes Description
Y/11GM . . . . . . . . . . . . . . Pneumatic gauge pressure transmitter.
Bellows
Capsule
-A ............ A capsule.
Span:0.07 to 0.55 MPa
-B ............ B capsule.
Span:0.14 to 1.4 MPa
-C ............ C capsule.
Span:0.28 to 2.7 MPa
-D ............ D capsule.
Span:0.7 to 6.8 MPa
-E ............ E capsule.
Span:1.4 to 13.7 MPa
Body Material *1 S .......... Forged JIS SUS 316 stainless steel.
Process Connection 1........
2........
3*2......
4*2......
8........
JIS Rc 1/4 female.
JIS Rc 1/2 female.
ANSI 1/4 NPT female.
ANSI 1/2 NPT female.
Diaphragm sealed transmitter.(Refer to GS 06P01D01-00E)
Options / /
Combinations // /
*1: Users must consider the characteristics of selected wetted parts material and the inuence of process uids. The use of
inappropriate materials can result in the leakage of corrosive process uids and cause injury to personnel and/or damage to
plant facilities. It is also possible that the diaphragm itself can be damaged and that material from the broken diaphragm and
the ll uid can contaminate the user’s process uids.
Be very careful with highly corrosive process uids such as hydrochloric acid, sulfuric acid, hydrogen sulde, sodium
hypochlorite, and high-temperature steam (150 ºC [302 ºF] or above). Contact Yokogawa for detailed information of the
wetted parts material.
*2: Air connections are also tapped for ANSI NPT threads in addition to the process connection.

<2. General> 2-4
IM 02C01B04-01EN
2.5 Options and Combinations
Options
Item Description Code
Kit for elevated-zero or
suppressed-zero ranges
Permits adjustments up to 1000 % of minimum
span and to range limits of capsule. Upper
range-value must not exceed upper range-limit of
capsule.
Elevated-zero L
Suppressed-zero R
Air set Supply pressure: 0.2 to 1 MPa, 2 to 10 kgf/cm2or bar, or 30 to 150 psi.
Output pressure: 140 kPa, 1.4 kgf/cm2or bar, or 20 psi.
Maximum operating temperature: 80 °C (180 °F). Refer to Table 2.2.
GAS-F
NAS-F
Low differential span Refer to Table 2.3.
Accuracy ±0.5% of span, ±1.0% of span with code R or L LD
Cover color other than
standard nish
Specify in color block by color code. Refer to GS22D01F01-00E. SCF-
Coating other than standard
nish
Epoxy resin-baked coated. EPF
Oxygen service
preparation*1
Degrease cleansing treatment OSW
Stainless steel bolts and
nuts
JIS SUS 630 bolts and nuts for the body and JIS SUS 630 bolts for process
connectors SSB
JIS SUS 630 bolts and nuts for the body and JIS SUS 630 bolts for process
connectors and sealant (liquid silicone rubber) are coated on surface of
SUS630 nuts.
SSB-S
Ammonia service*1 Force bar gasket: Neoprene rubber AMM
Stainless tube Tube and connectors between air-set (xed pressure regulator with lter) and
transmitter are made by stainless steel. However, connection of pressure
gauge remains as standard material (Bs-Ni3).
SST
ANSI connection Air connections: Tapped for 1/4NPT.
Applicable only for Y/11GM-S8 NPT
Tropicalization When there is a possibility to generate rusts using under the condition of
high temperature and high humidity area, silicone grease is coated on whole
screws. Silicon grease which has stronger oil lm feature.
PSG
M-calibration Output signal: 0.2 to 1.0 kgf/cm2CAL-M
P-calibration Output signal: 3 to 15 psi CAL-E
bar-calibration Output signal: 0.2 to 1.0 bar CAL-B
Stainless Tag plate Stainless Tag plate xed with screws. Up to 16 characters. TP-S
Reverse output signal*2 Reverse output signal ROUT
*1: Not applicable for Diaphragm seal.
*2: Not applicable for option code EPF.
Table 2.2 Air Set
Air Connection Gauge Scale Option Code
JIS Rc 1/4
female
0 to 200 kPa
0 to 2 kgf/cm2
0 to 30 psi
0 to 2 bar
Without gauge
GAS-FP
GAS-FM
GAS-FE
GAS-FB
GAS-F
1/4 NPT female
0 to 200 kPa
0 to 2 kgf/cm2
0 to 30 psi
0 to 2 bar
Without gauge
NAS-FP
NAS-FM
NAS-FE
NAS-FB
NAS-F
Table 2.3 Low Differential Spans
Capsule Span
kPa kgf/cm2psi
A 35 to 270 0.35 to 2.8 5 to 40
B 70 to 700 0.7 to 7 10 to 100
C 140 to 1350 1.4 to 14 20 to 200
D 350 to 3400 3.5 to 35 50 to 500
E 700 to 6800 7 to 70 100 to 1000

<2. General> 2-5
IM 02C01B04-01EN
Combinations
Item Description Code
Diaphragm seal Flush diaphragm type (2-inch) or extended diaphragm type (4-inch).
Refer to GS 06P01D01-00E DFS
<Reference>
Teon: Trademark of E.I. DuPont de Nemours & Co.
Buna N: Trademark of Bunawerk Huis Gmbh.
2.6 Dimensions
Unit : mm
110
25.4
Output connection
65
370
130
SUP OUT
12751
Allow clearance 150 mm
for cover removal
Air supply connection
(without air supply set)
Air supply set
(option)
Air supply gauge
(option)
Process connection
Air supply connection
(with air supply set)
Nominal 50 mm (2 inches) pipe
vertical or horizontal
(supplied by user)
939468
59
118
193
34
Allow clearance
150 mm for zero
adjustment
* 73 mm when A capsule.
*
F0203.ai

<3. Installation> 3-1
IM 02C01B04-01EN
3. Installation
3.1 Transmitter Mounting
Transmitter may be mounted in any position.
After transmitter is mounted, tighten all bolts.
Pipe may be clamped to another pipe, or anged
and bolted to oor or wall.
U-bolt secures assembly to 2" (nominal 50 mm)
pipe. U-bolt may be revolved 90° for use with
horizontal pipe.
Optional air-set can be mounted as illustrated
below.
F0301.ai
Bolt
Either set of
mounting holes
may be used.
For fixed regulator and
associated parts, refer to
Customer Maintenance
Parts List involved.
U-Bolt
2" Pipe
Figure 3.1 Transmitter Mounting
3.2 Typical Transmitter Piping
(1) Transmitter at Level of Pressure Tap
F0302.ai
2-inch pipe support
Pipe or tank
A
B
(2) Transmitter below Level of Pressure Tap
F0303.ai
2-inch pipe support
Pipe or tank
A
B
C
Figure 3.2 Typical Transmitter Piping
When zeroing transmitter (Refer to section 4.1),
close valve A and open plug B, or insert a test
gauge at B to read applied pressure and adjust
output to appropriate value. When transmitter is
located below pressure tap, use valve C as a drain,
or as a lling valve for seal uid.
3.3 Air Supply and Transmission
Piping
Receiver
Air filter-regulator (optional)
Output gauge
Supply gauge
Air supply
1/4" (8A) tubing
Transmitter
F0304.ai
Figure 3.3 Air Supply and Transmission Piping
NOTE
• Air supply must be regulated at 1.4 kgf/cm2or
bar, 140 kPa, or 20 psi.
• Transmitter uses 0.5 Nm3/h of air in normal
operation.
• Air must be clean and dry. Blow out lter
regularly.
• Transmission line must be free of leaks.

<4. Operation> 4-1
IM 02C01B04-01EN
4. Operation
4.1 Zero Adjustment
4.1.1 Without Elevated or Suppressed
Zero Range
Make zero adjustment with transmitter in operating
position.
1. Adjust air supply to pressure at which
transmitter will operate.
2. Vent pressure connection. On liquid lled
system, vent at level of pressure tap.
3. Connect a 0-1.5 kgf/cm2or bar, 0-150 kPa, or
0-22 psi test gauge (or manometer) to OUT
connection.
4. Adjust zero screw for a 0.2 kgf/cm2or bar, 20
kPa, or 3 psi output.
5. Disconnect test gauge and reconnect receiver.
If necessary, change zero adjustment on
receiver so that reading is zero.
OUT connection
Test gauge
Pressure connection
Air supply
(140 kPa)
F0401.ai
Zero screw
F0402.ai
Figure 4.1 Zero Adjustment
4.1.2 With Elevated or Suppressed Zero
Range
Make zero adjustment with transmitter in operating
position.
1. Set up equipment as shown above, but do not
vent pressure to atmosphere.
2. Insert test gauge in measurement line. For
liquid lled systems, insert gauge at level of
pressure tap.
Test gauge
F0403.ai
3. Adjust pressure to some value between 0.2 and
1.0 kgf/cm2or bar, 20 and 100 kPa, or 3 and
15 psi. Using formula below, calculate output
corresponding to this pressure.
4. Adjust zero elevation or zero suppression screw
so that output is approximately the calculated
value.
Adjust zero screw so that output is exactly at
the calculated value.
If necessary, change zero adjustment on
receiver so that reading is calculated value.
Zero elevation or
zero suppression
screw
Zero screw
With zero elevation
kit, screw is on
opposite side.
F0404.ai
Figure 4.2 Zero Adjustment
Formula to Calculate Output for Transmitter with
0.2-1.0 kgf/cm2Output
Output =
(0.8)
Test gauge reading – Lower range limit
+ 0.2
Upper range limit – Lower range limit
Example: Instrument Range, 10-14 kgf/cm2
Test gauge reading, 11 kgf/cm2
Output = (0.8) 11 – 10 + 0.2 = 0.4 kgf/cm2
14 – 10
Note: With 20 to 100 kPa or 3 to 15 psi output, substitute 20 and
80 or 3 and 12 for 0.2 and 0.8 respectively, in the equation
above.

<5. Maintenance> 5-1
IM 02C01B04-01EN
5. Maintenance
5.1 Calibration Notes
Calibration is required if the transmitter has been
taken apart for cleaning or for parts replacement,
if a change of range is desired, or if the amount of
zero elevation or zero suppression (if transmitter is
so equipped) is changed substantially.
If the capsule was removed or the exure cap screw
loosened, before calibrating, make the exure cap
screw adjustment.
The transmitter may be calibrated to 0.2-1.0 kgf/
cm2, 20-100 kPa, 0.2-1.0 bar, or 3-15 psi signal
pressure range. These four ranges are not exactly
equivalent; therefore the transmitter must be
calibrated to the same signal pressure range as the
receiver with which it is used.
5.1.1 Calibration Equipment
F0501.ai
Pressure
B
A
Vacuum
0-1.5 kgf/cm2or bar, 0-150 kPa, or
0-22 psi Test gauge (or manometer)
Pneumatic
Lock in desired pressure or vacuum with valve A.
Reduce by bleeding at B.
F0502.ai
Dead
weight
tester
Weights
Hydraulic
(required with high pressures)
Increase pressure with crank until pressure
supports an accurately-known weight. Accurate test
gauge may be used with hydraulic pump in a similar
set up.
Figure 5.1 Calibration Equipment
5.1.2 Calibration Procedure
Step 2, 4 and 5 in procedure below pertain only
to transmitters with elevated or suppressed zero
ranges. Illustrations for these steps show zero
suppression kit. If transmitter has zero elevation
kit, location of the 2 screws mentioned is reversed.
If transmitter has neither elevated nor suppressed
zero range, skip these steps.
1. Set up calibration equipment (Refer to section
5.1.1).
Check overrange stop adjustment (Refer to
section 5.1.5).
2. If transmitter has elevated or suppressed zero
range, disconnect spring from force bar as
follows.
F0503.ai
A. Remove screw from end of spring.
Bracket
B. Turn adjustment screw clockwise
until spring is clear of bracket.
Spring must not bind against
flapper or casting.
3. With no pressure on transmitter, adjust zero
screw so that output on test gauge reads 0.2
kgf/cm2or bar, 20 kPa, or 3 psi.
If screw was removed in Step 2-A, replace it.
F0504.ai
Zero screw

<5. Maintenance> 5-2
IM 02C01B04-01EN
4. With elevated or suppressed zero range, set
calibrating pressure equal to lower limit.
F0505.ai
Calibrating
pressure
5. Turn adjustment screw so that output is 0.2 kgf/
cm2or bar, 20 kPa, or 3 psi.
F0506.ai
Adjustment
screw
6. Set calibrating pressure equal to upper limit.
The output should be 1.0 kgf/cm2or bar, 100
kPa, or 15 psi.
7. If output is incorrect, loosen locknut and adjust
range wheel for correct output. Turning range
wheel down increases output. Retighten locknut
after each adjustment.
F0507.ai
Locknut
Range wheel
8. Repeat Steps 3 through 7 until the desired
accuracy is obtained. Tighten range wheel
locknut securely.
9. Make zero adjustment (Refer to section 4.1).
NOTE
An optional spring attachment permits the range
to be elevated zero or suppressed zero. The sum
of zero suppression plus span must not exceed
the upper range limit of the capsule. The amount
of zero elevation must not exceed – 1.0 kgf/cm2or
bar, – 100 kPa, or 15 psi.
5.1.3 To Change Range of Transmitter
The transmitter range may be changed to any value
within the limits of the capsule by changing the
span and zero adjustments. If the desired range
is outside the limits of the capsule installed in the
transmitter, a different capsule is required. (If the
capsule is changed, and “A” capsule is involved, a
different connection block and capsule O-ring are
required. Refer to Customer Maintenance Parts List
CMPL 02C01B04-01E for further details.)
Refer to section 2.3 (Table 2.1) for range, span, and
overrange limits for the various capsules.
■ Capsule Identication
Capsule is identied by designation (A, B, C, D and
E) stamped on face, or by dimension indicated.
F0508.ai
d
Dimension d (mm) Capsule
19 A
13 B
10 C
6 D
4 E
Figure5.2 CapsuleIdentication

<5. Maintenance> 5-3
IM 02C01B04-01EN
5.1.4 FlexureCapScrewAdjustment
This adjustment should be made if the capsule has
been replaced, or the cap screw loosened.
1. Set up calibration equipment (Refer to section
5.1.1).
2. Disconnect zero elevation or zero suppression
attachment as discribed in Step 2 of Calibration,
(Refer to section 5.1.2).
3. Vent pressure connection to the transmitter.
4. Loosen exure locknut using 9/64" hex-key
wrench.
5. With no pressure on transmitter, adjust zero
screw for 0.2 kgf/cm2or bar, 20 kPa, or 3 psi
output.
6. Carefully tighten exure cap screw and observe
output.
If output change is less than 0.014 kgf/cm2or
bar, 1.4 kPa, 0.2 psi, readjust zero screw to
bring output to 0.2 kgf/cm2or bar, 20 kPa, or 3
psi.
If output change is greater than 0.014 kgf/cm2
or bar, 1.4 kPa, or 0.2 psi, repeat Steps 4, 5 and
6. If change persists, check capsule installation
(Reter to section 5.6), then repeat Flexure Cap
Screw Adjustment.
7. Calibrate transmitter.
F0509.ai
Hex-key wrench
Zero screw
Figure5.3 FlexureCapScrewAdjustment
5.1.5 Overrange Stop Adjustment
The overrange stop prevents damage to both the
apper-nozzle and the dashpot. Before calibrating,
check that the stop is correctly adjusted.
IMPORTANT
Do not move the force bar if the overrange stop is
loose or disconnected.
1. Turn on air supply. Apply pressure to transmitter
so that output is stabilized at a value between
0.2 and 1.0 kgf/cm2or bar, 20 and 100 kPa, or 3
and 15 psi.
2. Clearance between both sides of overrange
stop (U-shaped bracket) and plate to be
sufcient to permit sliding piece of paper
between them.
3. If not, loosen screws with 3/32" hex-key wrench
and reposition stop to get correct clearance.
Retighten screws.
F0510.ai
Overrange stop
Screw
4. With zero elevation kit, loosen lockscrew with
3/32" hex-key wrench. Hold eccentric pin in
correct position with open-end wrench and
tighten lockscrew.
F0511.ai
Overrange stop
Instrument
with Zero Elevation Kit
Instrument
with Zero Suppression Kit
4.

<5. Maintenance> 5-4
IM 02C01B04-01EN
5.2 Supply Air Filter
F0512.ai
Blow lter out at least once a day.
Figure 5.4 Air Filter
5.3 To Clean Restrictor
A plugged restrictor will cause low output pressure.
1. Remove pneumatic amplier (Refer to section
5.8)
2. Lift out restrictor with tweezers.
3. Clean with a 0.18 mm dia. wire
4. Apply thin lm of Vaseline, or similar lubricant to
O-ring.
F0513.ai
Before August. 1975, restrictor was
screwed into side of casting.
Amplifier
Tweezers
Wire
O-ring
Figure 5.5 Cleaning of Restrictor
5.4 To Clean Nozzle Assembly
An accumulation of dirt at the apper nozzle may
cause a zero shift.
1. Unscrew nozzle nut. Do not let soldered nut on
opposite side of casting turn.
2. Ease nozzle out of casting.
3. Loosen clamp screw and rotate S-clamp.
Withdraw nozzle O-ring connection with twisting
motion. Do not bend tubing.
4. Clean nozzle with 0.73 mm dia. wire,
compressed air, or suitable solvent. Wipe top of
apper clean.
F0514.ai
Wire
O-ring
5. Before replacing, apply a thin lm of Vaseline
or similar lubricant to O-ring. Replace nozzle
assembly in reverse order. Check reference
adjustment (Refer to section 4.1).
F0515.ai
Nozzle O-ring
connection
Feedback O-ring
connection
Nozzle
assembly
Nozzle nut
Nozzle
Clamp screw
Figure 5.6 Cleaning of Nozzle Assembly

<5. Maintenance> 5-5
IM 02C01B04-01EN
5.5 To Remove Bellows Capsule
1. Insert 9/64" hex-key wrench in opening and
loosen, but do not remove exure cap screw.
Refer to Figure 5.8.
2. Remove the 2 body nuts and lift off pressure
connection block from transmitter.
Do not remove bolts.
3. Lift out capsule.
Do not bend exure.
F0516.ai
Connection
block Capsule
Hex-key
wrench
Figure 5.7 Remove Bellows Capsule
5.6 To Replace Bellows Capsule
When capsule is replaced, use new O-rings.
1. Lubricate O-rings with a thin lm of Vaseline or
similar lubricant. Position larger ring in recess in
body and smaller ring over shoulder of capsule.
2. Insert capsule with exure horizontal against
bottom of force bar.
3. Loosely screw cap screw into force bar to clamp
exure lightly.
4. Position connection block over bolts and tighten
nuts gradually to 55 N·m torque.
5. Tighten exure against bottom of force bar as
described in Flexure Cap Screw Adjustment
(Refer to section 5.1.4), then calibrate
transmitter (Refer to section 5.1.2).
F0517.ai
O-ring
Connection block Capsule identification
is stamped on face.
F0518.ai
Force bar
Flexure
Washer
Cap screw
9/64" wrench
Figure 5.8 Replace the Bellows Capsule.
5.7 To Clean or Replace Screens
F0519.ai
If fine screen air filters
become clogged,
remove with pointed
tool and replace.
Remove coarse screen
filter with pointed tool
for cleaning or replacement.
Figure 5.9 Clean or Replace Screens
5.8 To Remove Pneumatic
Amplier
To remove pneumatic amplier, remove 2 large
screws and pry off. A gasket is furnished with each
replacement amplier.
When replace the pneumatic amplier, tighten the
screws by the torque of 1.6 to 1.8 N·m (16 to 18
kgf·m).
For servicing details, refer to Appendix 1.
F0520.ai
Screw
Figure5.10 RemovePneumaticAmplier

<5. Maintenance> 5-6
IM 02C01B04-01EN
5.9 Further Disassembly
IMPORTANT
Normal servicing of the transmitter does not
require the removal of any parts other than those
already mentioned. Further disassembly is not
recommended by YOKOGAWA. The following
procedures are described for emergency use only
and the user must assume responsibility for loss of
accuracy or damage to the transmitter.
31 25
30 26
29 27
28
F0521.ai
Dashpot nut
Dashpot
Dashpot
clamp
Dashpot flexure
Flexure mounting
bracket
Dashpot clamp
screws
Parts associated with
servicing of dashpot.
Flexure locking
screw
5.9.1 Dashpot Removal
1. Remove exure locking screw 26 , and loosen
the two dashpot clamp screws 28 . Lift out
dashpot assembly. Disconnect exure 25 by
unscrewing dashpot nut 31 .
Caution: In removing and replacing dashpot nut, keep dashpot
30 from turning by putting a thin, open-end wrench
across at sections of dashpot just under exure.
2. To replace assembly, position narrow slotted
hole of exure on dashpot stud. Put washer
on stud and loosely screw on nut 31 . Slide
dashpot into clamp. Position exure laterally
so that slotted hole in free end is approximately
centered on tapped hole under it. Tighten nut
31 .
3. Adjust height of dashpot until free end of exure
just touches exure mounting bracket 27 .
Tighten the two clamp screws 28 . Loosely insert
exure locking screw 26 and its washer in place.
5.9.2 Dashpot Alignment
1. With air supply on, there must be some output
from transmitter.
2. Loosen exure locking screw 26 just enough
to allow free vibration of adjacent parts. Put
a nger on dashpot nut 31 and gently move
dashpot assembly back and forth (total travel is
about 1 mm) in line of exure. When assembly
is in middle of its travel, tighten exure locking
screw 26 . Flexure 25 must be at and horizontal.
F0522.ai
123
4
5
6
7
8
9
10
12
13
14
16
15
17
18
19
11
20 21
5.9.3 To Remove Feedback Bellows and
ZeroSpring(behindZeroScrew)
1. Carefully pry out feedback O-ring connection at
amplier (Refer to section 5.4).
2. Using 7/16" open-end wrench, remove the two
1/4" cap screws 12 holding bracket 11 .
3. Unscrew completely zero adjustment screw 13
to release zero spring. Bracket 11 and feedback
bellows 15 can now be removed.
4. Remove nut 14 to disconnect feedback bellows
from bracket.
5. Remove zero spring by unscrewing it from
range bar 16 . Be careful not to change
alignment on the spring clamp.
6. Reverse this procedure to reassemble, making
sure that post on bracket is within zero spring
alignment clamp. Tighten zero adjustment
screw until about 6 mm of thread remains
exposed. When replacing feedback connection,
apply a thin lm of Vaseline or similar lubricant
to O-ring.
7. Check calibration (Refer to section 5.1.2).

<5. Maintenance> 5-7
IM 02C01B04-01EN
5.9.4 ToRemoveBackFlexures
Unless front exure 6has already been removed,
7/64" hex-key wrench used in Step 2 must be cut
down to t into screws 20 .
1. Using 7/16" open-end wrench, remove 1/4" cap
screws 12 holding bracket 11 .
2. Using a 7/64" hex-key wrench, remove two
screws and plates 20 holding back exures 7,
and remove back exures.
3. Reverse this procedure to reassemble. Do not
tighten cap screws 12 .
4. Loosen cap screws 8and force bar screws
3 . Apply 10 kgf/cm2or bar, 1 MPa, or 150 psi
to transmitter. Tap body lightly and tighten all
screws.
5. Calibrate transmitter (Refer to section 5.1.2).
5.9.5 To Remove Force Balance Unit
1. Remove relay mounting assembly 5(Refer to
section 5.9.6).
2. Remove bellows capsule (Refer to section 5.5).
3. Using a 3/16" hex-key wrench, remove the
three socket-head screws holding force balance
unit to body. In removing screws, be careful not
to damage exures 6and 7. Withdraw force
balance unit from body.
4. Reverse this procedure to reassemble. When
tightening screws removed in Step 3, follow
procedure on section 5.9.10 to maintain original
factory accuracy. Replace O-ring that ts
around force bar on top of body.
Apply a thin lm of Vaseline or a similar
lubricant to the O-ring.
5. Calibrate transmitter (Refer to section 5.1.2).
5.9.6 To Remove Relay Mounting
Assembly
1. Carefully pry out nozzle and feedback O-ring
connections at amplier (Refer to section 5.4).
2. Remove relay mounting assembly 5by
unscrewing the two screws 9above mounting
plate and small screw 10 beneath mounting
plate.
3. Reverse this procedure to reassemble. When
replacing O-ring connections, apply a thin lm
of Vaseline or similar lubricant to O-rings.
5.9.7 ToRemoveFrontFlexure
1. If transmitter has optional zero elevation or
suppression attachment, remove this assembly.
2. Disconnect dashpot exure from arm (Refer to
section 5.9.1).
3. Carefully pry out both feedback and nozzle
O-ring connections at amplier and remove
nozzle tubing from casting 1(Refer to section
5.4).
4. Remove relay mounting assembly 5(Refer to
section 5.9.6).
5. Using a 7/64" hex-key wrench, remove top
plate 2by removing two plate screws 21 .
6. Using a 9/64" hex-key wrench, remove force
bar screws 3.
7. Remove cap screws 8and plates and lift front
exure 6off of dowel.
8. Reverse this procedure to reassemble. If force
bar has been removed or force balance unit
loosened from body, top of front exure should
be visually lined up with casting 1, so that there
is no twist evident in exures. Then tighten plate
screws 21 . Do not tighten cap screws 8.
9. Loosen cap screws 12 and force bar screws 3.
Apply 10 kgf/cm2or bar, 1 MPa, or 150 psi
to transmitter. Tap body lightly and tighten all
screws.
10. Check dashpot alignment (Refer to section
5.9.2) and check calibration (Refer to section
5.1.2).