ATI Technologies B12-70 O & M Manual

O & M Manual

B12-70

2-Wire Wet Acid

Gas Transmitter

Home Office European Office

Analytical Technology, Inc. ATI (UK) Limited
6 Iron Bridge Drive Unit 1 & 2 Gatehead Business Park
Collegeville, PA 19426 Delph New Road, Delph
Phone: [phone] Saddleworth OL3 5DE
610-917-0991 Phone: [phone]
Fax: [phone] Fax: + 44 (0)1457-874-468
Email: [e-mail] Email: [e-mail]

Web: www.Analyticaltechnology.com

Fax: [phone] Fax: + 44 (0)1457-874-468

Model B12-70 Wet Acid Gas Transmitter

TABLE OF CONTENTS

TABLE OF CONTENTS ................................................................................................................... 2

INTRODUCTION .............................................................................................................................. 4

SPECIFICATIONS............................................................................................................................ 6

INSTALLATION ............................................................................................................................... 7

MECHANICAL MOUNTING .......................................................................................................... 7

ELECTRICAL CONNECTION .......................................................................................................... 9

WET ACID GAS SENSOR ASSEMBLY ....................................................................................... 11

OPERATION .................................................................................................................................. 13

TRANSMITTER TEST POINTS .................................................................................................. 13

DIGITAL DISPLAY OPTION ....................................................................................................... 14

CALIBRATION ............................................................................................................................... 15

ZERO ADJUSTMENT ................................................................................................................. 15

SPAN ADJUSTMENT ................................................................................................................. 15

SENSOR RESPONSE TEST ...................................................................................................... 16

MAINTENANCE ............................................................................................................................. 17

SPARE PARTS LIST ..................................................................................................................... 18

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Model B12-70 Wet Acid Gas Transmitter

TABLE OF FIGURES

Figure 1 - Typical Insertion System Installation (ATI-0156) ................................................................... 4

Figure 2 - Typical Flow Through System Installation (ATI-0223) ........................................................... 5

Figure 3 - Nema 4X Transmitter Enclosure Dimensions (ATI-0198) ...................................................... 7

Figure 4 - Explosion-Proof Transmitter Enclosure Dimensions (ATI-0226) ......................................... 8

Figure 5 - Wet Acid Gas Sensor Dimensions (ATI-0276) ........................................................................ 8

Figure 6 - Electrical Connections (ATI-0181) ........................................................................................... 9

Figure 7 - Electrical Connections (ATI-0182) ......................................................................................... 10

Figure 8 - Wet Acid Gas Sensor Assembly (ATI-0265) ......................................................................... 11

Figure 9 - Transmitter Controls & Test Points (ATI-0227) .................................................................... 14

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Model B12-70 Wet Acid Gas Transmitter

INTRODUCTION

The Series B12-70 is a two-wire transmitter system designed for use with a special acid gas
sensor (for HF, HCl, or HBr) suitable for use in very wet environments. It provides a low power method of
monitoring acid gas in applications where excessive moisture causes rapid blinding of standard acid gas
sensors.

Transmitters are housed in a NEMA-4X polystyrene enclosure (Figure 3) suitable for installation
in virtually any environment. The sensor cable is wired to the proper terminals in the transmitter through
the Pg 11 cable gland located in one of the enclosure knockouts. One cable gland and one ½” conduit
hub is supplied for customer installation. An optional LCD provides local indication of gas concentration
on the front of the enclosure. The display is supplied only when specified on the order, and cannot be
added in the field.

B12 Transmitters are also available in an explosion-proof version. The explosion-proof version is
housed in a galvanized steel enclosure (Figure 4) rated for Class 1, Div. 1, Groups B, C, & D locations.
LCD is not available on the XP version.

Figure 1 shows a typical insertion B12-70 gas monitoring system. The sensor is shown threaded
into a blind flange of a vent stack.

Figure 1 - Typical Insertion System Installation (ATI-0156)

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Model B12-70 Wet Acid Gas Transmitter

Figure 2 shows a typical flow through B12-70 gas monitoring system. The sensor is shown with
the low volume flowcell in place. If used in insertion applications, the low volume flowcell must be
removed.

Figure 2 - Typical Flow Through System Installation (ATI-0223)

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Model B12-70 Wet Acid Gas Transmitter

SPECIFICATIONS

Type: Wet Acid Gases such as HF, HCl and HBr

Range: 0-10 PPM Min., 0-100 PPM Max.

Accuracy: ±0.2 PPM at constant temperature

Electronic Repeatability: ±1% of span

Electronic Linearity: ±0.5% of span

Output: Loop-powered 4-20 mA, 675 ohms maximum at 24 VDC

Power: 12-28 VDC

Display: None. Optional LCD available.

Enclosure: NEMA 4X polystyrene

Explosion-proof cast iron optional, Class 1, Div. 1, Groups B, C, & D.

Controls: Zero and span potentiometers mounted on transmitter circuit board

Operating Temperature: -5º to +55º C

Sensor: Model 70 Wet Acid Gas Sensor

Weight: 0.25 Lbs (0.12 Kg.)

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