Yokogawa WTB10-DO Series Dissolved Oxygen Measurement System Terminal Box

Yokogawa WTB10-DO Series Dissolved Oxygen Measurement System Terminal Box

Product basic information and positioning

1. Core functions and application scenarios

Product positioning: The WTB10-DO series terminal box is a supporting equipment for dissolved oxygen measurement systems, used for signal conversion when dissolved oxygen sensors and converters (such as FLXA402, FLXA202, FLXA21) are installed separately. It supports outdoor installation (in accordance with JIS C0920 rainproof structure standard).

System association: It needs to be used in conjunction with specific models of dissolved oxygen sensors (such as DO30G), converters, and installation brackets (such as PH8HG, PB350G, DOX8HS) from Yokogawa. Different models of terminal boxes correspond to different converters. The specific association manual is shown in the table below:

Associated device model, device name, corresponding manual number

FLXA402 4-wire converter IM 12A01F05-01eN

FLXA202, FLXA21 2-wire liquid analyzer IM 12A01A02-01E

DO30G dissolved oxygen sensor IM 12J5B3-01E

PH8HG guide bracket IM 12B7M2-01E

PB350G floating bracket IM 19H1E1-01E

DOX8HS diving bracket IM 19H1D2-01E

Product specifications and model description

1. Core specification parameters

Structural type: Outdoor type, JIS C0920 rainproof structure

Shell material: Glass fiber reinforced polycarbonate resin

Shell color gray green (Munsell color card 2.5 GY 5.0/1.0 or equivalent color)

Installation methods: bracket installation (no additional bracket required), pipeline installation (requires/P option bracket), wall installation (requires/W option bracket)

Weight: Terminal box body 0.5kg; Pipe installation bracket about 0.7kg; Wall installation bracket about 0.3kg

Working temperature -10~50 ℃

Cable entrance sensor cable: diameter 13mm, equipped with JIS A8 grade cable sealing sleeve (suitable for cable outer diameter 5.5-7mm); Special extension cable: diameter 21mm, equipped with JIS A15 grade cable sealing sleeve (suitable for cable outer diameter 9-12mm)

The length of the dedicated extension cable can be selected from 5m, 10m, 20m, 30m, and 40m, and the end has been pre treated; When installing/AWTB (G1/2 internal thread) or/ANSI (1/2 NPT) conduit adapters, a sealing sleeve and adapter will be included

2. Model and suffix code rules

Model structure: WTB10- [Applicable system code] - [Fixed suffix] - [Cable length code]+[Option code], the meanings of each part are as follows:

Meaning of Component Code Examples

Applicable System - DO3 compatible with FLXA402, FLXA202, FLXA21 (pin terminal, cable with pin terminal)

-DO4 compatible with FLXA202, FLXA21 (M4 threaded terminal, with M4 ring terminal cable)

-DO5 compatible with FLXA402 (M3 threaded terminal, with M3 ring terminal cable)

Fixed suffix - NN is used for all models

Cable length -00 without extension cable

-05/-10/-20/-30/-40 Extension cable length 5m/10m/20m/30m/40m

Option code/P includes pipeline installation bracket

/W includes wall installation bracket

/AWTB includes G1/2 internal thread conduit adapter

/ANSI includes 1/2 NPT conduit adapter

Accessories List: Different models of terminal boxes come with different standard accessories. Taking WTB10-DO3 as an example, the standard accessories include sensor cable sealing sleeve (B1001JZ), extension cable sealing sleeve (B1002JZ), and corresponding length extension cable (K9316S □ series). Corresponding brackets are included when installing/P or/W, and conduit adapters are included when installing/AWTB or/ANSI.

Installation process and requirements

1. Preparation before installation

Installation environment:

Outdoor rainproof, sensors should be installed as close as possible to the terminal box;

Avoid high humidity and corrosive gas environments (to prevent contact failures caused by cable breakage, poor insulation, or corrosion);

The terminal box cover is equipped with a silicone desiccant (about 30g), and its moisture absorption status needs to be checked regularly.

Installation tools and accessories: Prepare M5 screws (bracket installation, length=bracket thickness+5mm), M8 screws (wall installation, 3 pieces), U-bolts (pipeline installation, suitable for pipes with an outer diameter of 60.5mm), as well as standard accessories such as cable glands and extension cables according to the installation method.

2. Detailed explanation of installation method

(1) Bracket installation

Drill holes on the bracket according to the installation hole size of the terminal box (4 holes with a diameter of 5.5mm, hole spacing of 75 ± 0.2mm × 70 ± 0.2mm);

Fix the terminal box on the bracket with 4 M5 screws, and the screw depth should cover the thickness of the bracket before penetrating 5mm to ensure firmness.

(2) Pipeline installation (requires/P option support)

Fix the pipeline installation bracket (K9141SA) onto a sturdy pipeline with an outer diameter of 60.5mm (nominal 50A) using U-bolts, washers, and nuts;

Fix the terminal box on the bracket with 4 M5 screws, which can be installed vertically or horizontally.

(3) Wall installation (requires/W option bracket)

Drill holes on the wall according to the size (3 M8 screw holes, with a hole spacing that meets the positioning requirements of the terminal box center);