YOKOGAWA PH8TBG User manual

User’s
Manual Model PH8TBG
Terminal Box
IM 12B07W01-01E
IM 12B07W01-01E
3rd Edition

i
IM 12B07W01-01E 3rd Edition : Nov. 28, 2018-00
uIntroduction
This user’s manual covers the PH8TBG Terminal Box for the FLXA402 or the PH450G.
For the FLXA402 4-Wire Converter, refer to IM 12B01F01-02EN.
For the PH450G pH/ORP converter, refer to IM 12B07C05-01E.
Media No. IM 12B07W01-01E 3rd Edition : Nov. 2018 (YK)
All Rights Reserved Copyright © 2001, Yokogawa Electric Corporation

ii
IM 12B07W01-01E 3rd Edition : Nov. 28, 2018-00
uFor the safe use of this equipment
nNotes on Handling User’s Manuals
• Please hand over the user’s manuals to your end users so that they can keep the user’s
manuals on hand for convenient reference.
• Please read the information thoroughly before using the product.
• The purpose of these user’s manuals is not to warrant that the product is well suited to any
particular purpose but rather to describe the functional details of the product.
• No part of the user’s manuals may be transferred or reproduced without prior written
consent from YOKOGAWA.
• YOKOGAWA reserves the right to make improvements in the user’s manuals and product at
any time, without notice or obligation.
• Ifyouhaveanyquestions,oryoundmistakesoromissionsintheuser’smanuals,please
contact our sales representative or your local distributor.
n Safety,Protection,andModicationoftheProduct
• In order to protect the system controlled by the product and the product itself and ensure
safe operation, observe the safety precautions described in this user’s manual. We assume
no liability for safety if users fail to observe these instructions when operating the product.
• Ifthisinstrumentisusedinamannernotspeciedinthisuser’smanual,theprotection
provided by this instrument may be impaired.
• If any protection or safety circuit is required for the system controlled by the product or for
the product itself, prepare it separately.
• Be sure to use the spare parts approved by Yokogawa Electric Corporation (hereafter
simply referred to as YOKOGAWA) when replacing parts or consumables.
• Modicationoftheproductisstrictlyprohibited.
• The following safety symbols are used on the product as well as in this manual.
WARNING
This symbol indicates that an operator must follow the instructions laid out in this manual in order
to avoid the risks, for the human body, of injury, electric shock, or fatalities. The manual describes
what special care the operator must take to avoid such risks.
CAUTION
This symbol indicates that the operator must refer to the instructions in this manual in order to
prevent the instrument (hardware) or software from being damaged, or a system failure from
occurring.
CAUTION
This symbol gives information essential for understanding the operations and functions.
NOTE
This symbol indicates information that complements the present topic.
nWarning and Disclaimer
The product is provided on an “as is” basis. YOKOGAWA shall have neither liability nor
responsibility to any person or entity with respect to any direct or indirect loss or damage arising
from using the product or any defect of the product that YOKOGAWA can not predict in advance.

iii
IM 12B07W01-01E 3rd Edition : Nov. 28, 2018-00
uAfter-sales Warranty
nDo not modify the product.
nDuring the warranty period, for repair under warranty consult the local sales
representativeorserviceo󰀩ce.Yokogawawillreplaceorrepairanydamaged
parts. Before consulting for repair under warranty, provide us with the model
name and serial number and a description of the problem. Any diagrams or
data explaining the problem would also be appreciated.
• If we replace the product with a new one, we won’t provide you with a repair report.
• Yokogawa warrants the product for the period stated in the pre-purchase quotation
Yokogawashallconductdenedwarrantyservicebasedonitsstandard.Whenthe
customer site is located outside of the service area, a fee for dispatching the maintenance
engineer will be charged to the customer.
nIn the following cases, customer will be charged repair fee regardless of
warranty period.
• Failure of components which are out of scope of warranty stated in instruction manual.
• Failure caused by usage of software, hardware or auxiliary equipment, which Yokogawa
Electric did not supply.
• Failureduetoimproperorinsu󰀩cientmaintenancebyuser.
• Failureduetomodication,misuseoroutside-of-specicationsoperationwhichYokogawa
does not authorize.
• Failureduetopowersupply(voltage,frequency)beingoutsidespecicationsorabnormal.
• Failure caused by any usage out of scope of recommended usage.
• Anydamagefromre,earthquake,stormsandoods,lightning,disturbances,riots,warfare,
radiation and other natural changes.
n Yokogawadoesnotwarrantconformancewiththespecicapplicationatthe
usersite.Yokogawawillnotbeardirect/indirectresponsibilityfordamagedue
toaspecicapplication.
n YokogawaElectricwillnotbearresponsibilitywhentheuserconguresthe
product into systems or resells the product.
n Maintenanceserviceandsupplyingrepairpartswillbecoveredforveyears
after the production ends. For repair for this product, please contact the
nearestsaleso󰀩cedescribedinthisinstructionmanual.

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Toc-1
IM 12B07W01-01E 3rd Edition : Nov. 28, 2018-00
Model PH8TBG
Terminal Box
CONTENTS
IM 12B07W01-01E 3rd Edition
uIntroduction....................................................................................................i
uFor the safe use of this equipment.............................................................ii
uAfter-sales Warranty ...................................................................................iii
1. Overview.................................................................................................... 1-1
1.1 StandardSpecications................................................................................... 1-1
1.2 ModelandSu󰀩xCodes ................................................................................... 1-1
1.3 External Dimensions ........................................................................................ 1-2
2. Installation and Wiring............................................................................. 2-1
2.1 Installation ......................................................................................................... 2-1
2.1.1 Installation Location ........................................................................... 2-1
2.1.2 How to Mount It .................................................................................. 2-1
2.2 Wiring ................................................................................................................. 2-2
2.2.1 Processing of Cable Inlet Hole........................................................... 2-2
2.2.2 Connecting Sensor Cable.................................................................. 2-3
2.2.3 Connecting Special Cable ................................................................. 2-4
3. Inspection and Maintenance................................................................... 3-1
Customer Maintenance Parts List.....................................CMPL 12B05W01-01E
Revision Record.......................................................................................................i

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<1. Overview> 1-1
IM 12B07W01-01E 3rd Edition : Nov. 28, 2018-00
1. Overview
Model PH8TBG Terminal Box is used for temporary connections between pH sensor and other
equipment when the sensor is temporarily disconnected from its cable.
1.1 StandardSpecications
Construction : JIS waterproof construction, for installation outside.
Materials : Fiberglass reinforced polycarbonate resin.
Color : Grey-green (equivalent to Munsell 2.5G5/1.5)
Weight : Approx. 0.5 kg (body)
Approx. 0.7 kg (with optional pipe or wall mounting hardware)
Mounting : Bracket mounting (mounting hardware unnecessary)
Pipe mounting (need to specify pipe mounting hardware)
Wall mounting (need to specify wall mounting hardware)
Environmental temperature : –10 to 50°C
Cable outlet : Cable mounted in cable gland
For sensor cable; ø13 mm hole (punch out using supplied tool when wiring.)
(note) Cable gland (polycarbonate resin, equivalent to JIS A8) is supplied on the sensor cable. Cable connecting equipment; ø21 mm
hole (punch out using supplied tool when wiring.)
(note) Cablegland(polycarbonateresin,equivalenttoJISA15)issupplied.Ifspecied,adapterforconduitconstruction(terminalbox
and connecting equipment; G1/2 screw thread) is also supplied. For conduit construction, follow Figure 2.8 and be sure to use
supplied cable gland (polycarbonate resin).
1.2 ModelandSu󰀩xCodes
Table 1.1
Model Su󰀩xCode Option
Code Description
PH8TBG ...................................... ................... Terminal Box
—*A ................... Style A
Option Mounting hardware
Length of special cable
Adapter for conduit
construction (*)
/P
/W
/C□□
/ATBG
Pipe mounting hardware
Wall mounting hardware
□;Standard/C03(3m),/C07(7m),/C10(10m)
(max. 20 m)
G1/2 screw thread
(*) Incaseofconduitconstruction,adapterforconduitconstruction/ATBGisspecied.

<1. Overview> 1-2
IM 12B07W01-01E 3rd Edition : Nov. 28, 2018-00
1.3 External Dimensions
126 65 48
30
254 75
±0.2
178
70±0.2
F0101.ai
Unit: mm
For conduit construction
Adapter (option)
Pipe mounting hardware
(example)
Waterproof gland
13
185
15
27
70±0.2
70±0.2
100
15
3 - ø10 hole
4 - ø5.5 hole
75
±0.2
<Wall mounting hardware>
48
Nominal 50A
pipe mounting
70±0.2
100
203
8
4 - ø5.5 hole
75±0.2
<Pipe mounting hardware>
4-M5 screws, 9mm deep
(for mounting)
46
22
Figure 1.1 External Dimensions of PH8TBG Terminal Box

<2. Installation and Wiring> 2-1
IM 12B07W01-01E 3rd Edition : Nov. 28, 2018-00
2. Installation and Wiring
2.1 Installation
2.1.1 Installation Location
Since terminal box is waterproof, you can install it outdoors. Be sure to install it as close to the
sensor as possible.
2.1.2 How to Mount It
Terminal box can be mounted on bracket, pipe (nominal 50A size) or wall. However for pipe
or wall mounting, order and use the optional mounting hardware. This mounting hardware is
suppliedwhenspecied.
F0201.ai
Bracket
Terminal Box
F0202.ai
Terminal Box 50 A pipe
Pipe mounting bracket
Figure2.1 BracketMounting  Figure2.2 PipeMounting
F0203.ai
Terminal Box
Wall mounting bracket
Wall
Figure 2.3 Wall Mounting

<2. Installation and Wiring> 2-2
IM 12B07W01-01E 3rd Edition : Nov. 28, 2018-00
2.2 Wiring
Indoors terminal board in terminal box is connected by dedicated sensor cable (used for wiring
sensor to the FLXA402 or the PH450G.
S
GE
T2
T1
SE
RE
Special cable
Sensor cable
F0204.ai
Terminal Box
S
GE
T2
T1
SE
RE
S
GE
T2
T1
SE
RE
pH converter
S
GE
T1
T2
SE
RE
S
GE
T1
T2
SE
RE
ø6.5
ø9.5
40 80
Terminal box side Max. 20m (depending on your specifications)
Cable gland (JIS A8 equivalent)
Optinal Extension Cable
Unit: mm
Figure 2.4 Wiring
2.2.1 Processing of Cable Inlet Hole
Open the cable inlet hole in terminal box using the supplied punch tool. The location of the cable
inlet hole is shown by the circle-shaped groove under the case. The end of the supplied punch
tool is put in the center of this circle and it is tapped with appropriate force. You can punch out the
hole along the groove.
F0205.ai
Hole punching tool for wiring
(supplied as accessory)
Figure 2.5 How to punch out the wiring hole

<2. Installation and Wiring> 2-3
IM 12B07W01-01E 3rd Edition : Nov. 28, 2018-00
2.2.2 Connecting Sensor Cable
(1) Loosen two screws which are at front of terminal box and detach the cover.
(2) After detaching the nut from the cable gland of sensor cable, pull the cable into the terminal
box from sensor cable inlet hole.
(3) Connect the sensor cable to the terminals.
After passing the cable through the nut, check the symbol on each core wire, then connect
each core wire to the corresponding terminal.
CONVERTER
SENSOR
F0206.ai
Figure 2.6 Connecting Sensor Cable
(4) Mount the cable gland in the cable inlet hole.
 Putthenutinplace,andscrewitontothemainbodysu󰀩ciently.Atthistime,loosenthe
packingglandsothatthecableisnottwisted.Afterxingthemainbody,tightenthepacking
gland to keep moisture out of the equipment. However if the packing gland is screwed up
too tight, the cable will be damaged.
F0207.ai
Nut
Gasket
Cable
Packing gland
Cable gland
Figure 2.7 Cable Gland

<2. Installation and Wiring> 2-4
IM 12B07W01-01E 3rd Edition : Nov. 28, 2018-00
2.2.3 Connecting Special Cable
ThespecialcableiswiredbetweenterminalboxandpHconverter.Thisspecialcableofspecied
length is supplied with the terminal box. Furthermore, to protect the cable at conduit, detach the
packing gland from cable gland (pH converter cable inlet hole) which is mounted in supplied
cable gland (terminal box cable inlet hole) and special cable, and mount the adapter (specially
supplied) instead. The special cable connection to the terminal box is created as follows:
(1) Mount the special cable in the supplied cable gland.
After disassembling the cable gland, pass the cable through packing gland (or adapter),
cable clamp, packing, main body and gasket in order. The nut is mounted after pulling the
cable through it. Furthermore, use heat shrink tube around the cable gland after mounting it.
(2) Pull the cable inside. Then after pulling cable through the nut, connect the cable core wires
to the appropriate terminals.
(3) Mount the cable gland on the cable inlet hole.
Placethenutinplace,thenscrewitintothemainbodysu󰀩ciently.Afterxingthemain
body, mount packing gland or adapter tightly to prevent moisture entering.
(4) Mountthefrontcoverofterminalbox.Besuretoscrewupthemountingscrewsu󰀩ciently.
(5) When protecting the cable in conduit, screw the adapter in the union connecting place of
conduit.
G1/2 or 1/2 NPT screw thread
49 Approx. 55
Adaptor
Case
Nut
Rubber packing
Unit: mm
Cable gland
Case
* Plastic cable gland which is
supplied as an accessory.
F0208.ai
Heat shrink tube
Adapter for conduit
construction (cross section view)
Figure 2.8 Cable Inlet Hole for Conduit Construction

<3. Inspection and Maintenance> 3-1
IM 12B07W01-01E 3rd Edition : Nov. 28, 2018-00
3. Inspection and Maintenance
Normally,itissu󰀩cienttoinspectthePH8TBGterminalboxduringperiodicsystemrepairs(once
a year or every two years), as far as it works without Fail. Daily inspection and maintenance are
not required.
nTerminal Box Inspection
l CheckingforMoistureandPerformingtheRequiredMaintenance
Remove the cover of the terminal box and check for moisture. If the inside is very damp, use a
hair drier to dry the inside of the box. If you have a spare desiccative, replace the desiccative
(approx. 30 g of silica gel).
l CheckingforCorrosionandPerformingtheRequiredMaintenance
Check that corrosive gas has not entered the terminal box and corroded the terminals and
conductors. If the corrosion is excessive and problems such as poor contact and disconnection
seem likely, replace the corroded parts. When crimping terminal lugs of the core wires are
replaced, make sure not to lose the connection number label (mark band).

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Customer
Maintenance
Parts List
All Rights Reserved, Copyright © 1982, Yokogawa Electric Corporation.
Subject to change without notice.
Model PH8TBG
Terminal Box
CMPL 12B05W01-01E
3rd Edition : Dec. 2001 (YK)
123 4567
8910
11
12
16
15
13
16
20
19
18
17
CMPL_P01.EPS
PM
E
1
2
3
4
5
6
7
8
9
10
11
12
13
15
16
17
18
19
20
K9141XR
K9141XM
K9141XN
G9303NB
K9141XD
K9020XR
K9141XT
Y9304LB
K9141XQ
Y9405LB
K9141YA
K9141XA
K9141SA
K9141SB
D0117XL-A
Y9508JU
K9141SC
K9149SC
Y9508JU
1
2
2
2
1
1
1
2
1
2
1
1
1
1
1
4
1
1
4
Nameplate
Screw
Gasket
O-Ring
Cover
Desiccant (30 g)
Plate
B.H. Screw, M3 x 4
Gasket
B.H. Screw, M4 x 5
Terminal Assembly
Case
Bracket Assembly (for pipe mounting); option
Bracket
U-Bolt Assembly
Pan H. Screw, M5 x 8
Bracket Assembly (for wall mounting); option
Bracket
Pan H. Screw, M5 x 8
Item Part No. Description
Qty

2
CMPL 12B05W01-01E 3rd Edition: Dec. 2001(YK)
1
23
56
4
7
CMPL_P02.EPS
7 Below
K9141ZK
K9141ZL
K9141ZM
K9141ZN
K9141ZP
K9141ZQ
K9141ZR
K9141ZS
K9141ZT
K9141ZU
1Cable Assembly
Cable length 1 m
Cable length 2 m
Cable length 3 m
Cable length 4 m
Cable length 5 m
Cable length 6 m
Cable length 7 m
Cable length 8 m
Cable length 9 m
Cable length 10 m
Item Part No. Description
Qty
Item
2
3
4
5
6
Part No.
K9141SR
B1002JZ
K9141ST
K9141TX
K9141TY
Description
Punch
Gland (JIS A15)
Sheet
Conduit Adaptor
(G1/2, JIS A15)
Conduit Adaptor
(G1/2, JIS A8)
Item 1 Gland Assembly
K9141TE
1
1
1
K9141UE
1
1
1
1
1

i
IM 12B07W01-01E 3rd Edition : Nov. 28, 2018-00
Revision Record
lManual Title : Model PH8TBG Terminal Box
lManual No. : IM 12B07W01-01E
Nov.2018/3rdEdition
Added FLXA402
Jul.2006/2ndEdition
Some error corrected
Dec.2001/1stEdition
Newly published
Yokogawa Electric Corporation
2-9-32 Nakacho, Musashino-shi, Tokyo 180-8750, JAPAN
http://www.yokogawa.com/

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