Novatech CONTROLS 1738 Manuel utilisateur

Dew Point Transmitter

Model 1738

Operators Manual

January 2020

 
January 2020 Operators Manual 
Dew Point Transmitter 1 
TABLE OF CONTENTS 
USING THIS MANUAL.................................................................................................................................. 3 
1 CAUTIONS.................................................................................................................................................. 3 
2 WARNING SYMBOLS.................................................................................................................................... 4 
INTRODUCTION ........................................................................................................................................... 5 
SPECIFICATIONS......................................................................................................................................... 7 
1 HARDWARE SPECIFICATIONS....................................................................................................................... 7 
2 OPERATIONAL SPECIFICATIONS................................................................................................................... 8 
DISPLAY AND KEYPAD .............................................................................................................................. 9 
1 RUN MODE DISPLAY................................................................................................................................... 9 
2 TOP LINE DISPLAY.................................................................................................................................... 10 
3 KEYPAD ................................................................................................................................................... 10 
3.1 KEYPAD IN RUN MODE ...................................................................................................................... 10 
3.2KEYPAD IN SETUP MODE.................................................................................................................... 12 
3.3 INFORMATION SCREEN....................................................................................................................... 12 
SETUP MENU ............................................................................................................................................. 13 
1 SETUP MODE FUNCTION SUMMARY........................................................................................................... 13 
2 SETUP MODE DETAILS.............................................................................................................................. 13 
3 SETUP MENU FUNCTIONS ......................................................................................................................... 14 
3.1 PROBE 1&PROBE 2OFFSET............................................................................................................. 14 
3.2 LOWER LINE ITEMS ............................................................................................................................ 14 
3.3 OXYGEN DISPLAY UNITS .................................................................................................................... 15 
3.4 DAMPING FACTOR.............................................................................................................................. 15 
3.5 PROCESS ALARMS............................................................................................................................. 15 
ALARMS ..................................................................................................................................................... 17 
1 CHECKING AND ACCEPTING AN ALARM....................................................................................................... 18 
1.1 CURRENT ALARMS............................................................................................................................. 18 
1.2 ALARM LOG....................................................................................................................................... 19 
2 ALARM RELAYS ........................................................................................................................................ 19 
3 COMMON ALARMS .................................................................................................................................... 19 
4 SELECTABLE PROCESS ALARMS................................................................................................................ 21 
5 WARNING MESSAGES ............................................................................................................................... 21 
GAS CALIBRATE AND PURGE ................................................................................................................ 23 
1 ACTIONS THAT OCCUR WHEN THE GAS SOLENOID KEYS ARE PRESSED....................................................... 24 
INDEX.......................................................................................................................................................... 25 
 
 

Operators Manual January 2020

21738 Dew Point Transmitter

This manual describes the transmitter firmware version 1.11, 03 January 2020

Neither the whole nor any part of the information contained in, or the product described in, this manual may

be adapted or reproduced in any material form except with the prior written approval of Novatech Controls

Pty Ltd (Novatech).

The product described in this manual and products for use with it are subject to continuous developments

and improvement. All information of a technical nature and particulars of the product and its use (including

the information in this manual) are given by Novatech in good faith. However, it is acknowledged that there

may be errors or omissions in this manual. A list of details of any amendments or revisions to this manual

can be obtained upon request from Novatech Controls Technical Enquiries. Novatech Controls welcome

comments and suggestions relating to the product and this manual.

All correspondence should be addressed to: -

Technical Enquiries

Novatech Controls Pty Ltd

309 Reserve Road, Tel: +61 3 9585 2833

Cheltenham Fax: +61 3 9585 2844

Victoria 3192 Email: [email protected]m.au

Australia Web site: http://www.novatech.com.au/

Novatech Controls or their authorised dealers should carry out all maintenance and service on the product.

Novatech Controls can accept no liability whatsoever for any loss or damage caused by service or

maintenance by unauthorised personnel. This manual is intended only to assist the reader in the use of the

product, and therefore Novatech Controls shall not be liable for any loss or damage whatsoever arising from

the use of any information or particulars in, or any error or omission in, this manual, or any incorrect use of

the product.

January 2020 Operators Manual

1738 Dew Point Transmitter 3

1. USING THIS MANUAL

This manual is a shortened version of the 1738 Dew Point Transmitter product manual to be used by the

operator. It does not cover the commissioning, calibration or servicing of the 1738 Dew Point Transmitter. If

more detailed information is required than what is provided in this manual please refer to the more detailed

1738 Dew Point Transmitter Technical Manual. Both manuals are supplied with each transmitter and are

also available at the Novatech Controls website.

https://www.novatech.com.au/products/1738

It is assumed in this manual that the transmitter has been installed by competent personal and that the wiring

to the main power supply, the oxygen probe and all the associated signal devices complies with the local

safety codes and regulations.

1.1 Cautions

Please read the safety information below before connecting power to the transmitter.

CAUTION 1

The probe heater is supplied with mains voltage. This supply has electrical shock danger to maintenance

personnel. Always isolate the transmitter before working with the probe.

The EARTH wire (green) from a heated probe must ALWAYS be connected to earth.

CAUTION 2

Combustion or atmosphere control systems can be dangerous. Burners must be mechanically set up so that

in the worst case of equipment failure, the system cannot generate explosive atmospheres. This danger is

normally avoided with flue gas trim systems by adjustment so that in the case of failure the appliance will not

generate CO in excess of 400 ppm in the flue. The CO level in the flue should be measured with a separate

CO instrument, normally an infrared or fuel cell type.

CAUTION 3

The oxygen probe is heated to over 700°C/1290°F and is a source of ignition. Since raw fuel leaks can

occur during burner shutdown, the transmitter has an interlocking relay that removes power from the probe

heater when the main fuel shut-off valve power is off. If this configuration does not suit or if it is possible for

raw fuel to come into contact with a hot oxygen probe then the Model 1738 transmitter with a heated probe

will not be safe in your application.

An unheated probe can be utilised in such applications, however the oxygen readings are valid only above

650°C/1200°F.

CAUTION 4

The reducing oxygen signal from the transmitter and the associated alarm relay can be used as an explosive

warning or trip. This measurement assumes complete combustion. If incomplete combustion is possible

then this signal will read less reducing and should not be used as an alarm or trip. A true excess

combustibles analyser, normally incorporating a catalyst or thermal conductivity bridge, would be more

appropriate where incomplete combustion is possible.

Also read the probe electrical shock caution in the probe heater interlock caution in chapter 4.7 of the Model

1738 Technical Manual.

CAUTION 5

FIL-3 filter. If the optional FIL-3 has been fitted to the 1231 probe in this installation, please read the

Important Notice in the Technical Manual.

Operators Manual January 2020

41738 Dew Point Transmitter

1.2 Warning Symbols

Danger, high voltage. Risk of electrical shock.

Caution hot surface.

Caution, risk of danger. See additional information

in the manual.

January 2020 Operators Manual

1738 Dew Point Transmitter 5

2. INTRODUCTION

The Novatech 1738 Dew Point Transmitter provides in-situ measurement for one or two oxygen probes in

annealing and other furnaces with protective atmospheres of hydrogen / nitrogen. The transmitter provides

local indication of oxygen and dew point as well as several other process related variables.

The 1738 Dew Point Transmitter is the direct replacement for the superseded model 1638 transmitter. It

includes a number of hardware and software improvements such as a graphic display, larger characters,

faster microprocessor, simplified set up menu, alarm logging, faster probe heater control and more

calculated values such as burner efficiency.

The 1738 Dew Point Transmitter has a variety of user-selectable functions. They are simple to use because

each selection is menu driven. For options you are not sure about, read the manual on that particular item in

chapter 5. Setup Menu.

Features include:-

Inputs

Two zirconia oxygen probe, heated or unheated

Oxygen range from 1 x 10-30 to 100%

Furnace, kiln or flue thermocouple, field selectable as type K, J, R or S

Main flame established safety interlock (for heated probes only)

Purge flow switch

Outputs

Two linearized 4-20mA or 0-20mA DC isolated outputs, max. load 1000

The output function and the range are field selectable

Common alarm relay (programmable)

Three other alarm relays with selectable functions

Computer

RS 232-C or RS 485 for connection of a computer terminal or printer for diagnostics of the transmitter, probe

or combustion process. This connection is suitable for network connection to a computer, DCS or PLC using

MODBUSprotocol.

Display

Multi font graphical display

Large characters for the oxygen on the top line

Multiple lower line items for the secondary functions. ie Probe temperature, % Oxygen for the second probe

Alarm display mode that shows the time the alarm occurred and the acceptance time

Alarm log mode that keeps the time the alarm occurred, the acceptance time and the time the alarm was

cleared for the last 4,000 alarms

Power

Universal mains supply voltage, 100 to 240VAC

Automatically detects the mains voltage and frequency and set the power control accordingly

Operators Manual January 2020

61738 Dew Point Transmitter

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January 2020 Operators Manual

1738 Dew Point Transmitter 7

3. SPECIFICATIONS

3.1 Hardware Specifications

Number of oxygen probes: 1 or 2

Oxygen range: 1 x 10-30 to 100%

Dew Point range -60°C to 40°C

Pre Reactive Oxygen range 0 to 10%

Oxygen Accuracy: ±1% of actual measured oxygen value with a repeatability of

±0.5% of the measured value

Thermocouple types: Type K, J, R and S

Temperature accuracy: ±2°C

Analog outputs: 0-20mA or 4-20mA field selectable

Active Outputs

(WARNING: DO NOT LOOP POWER OUTPUTS. Use only passive receivers for commissioning and

testing. The use of loop powered receivers will damage the output)

Analog output load: 1000 ohm max

Alarm relays: 4

Alarm relay contacts: 2Amp 240VAC, 2A 30VDC

(WARNING: Do not use both mains voltage and low voltage connections to adjacent alarm contacts)

Mains voltage supply: 100 to 240VAC, 50/60 Hz

Reinforced Insulation

Overvoltage: Category II (IEC60364-4-443)

Power: 5 Watts for controller plus probe power

530W max., 25% duty cycle each probe on 240VAC

110W max., 100% duty cycle each probe on 110VAC

576W (2.4A) max

Environmental Rating: Operating Temperature -25°C to 55°C

Relative Humidity 5% to 95% (non-condensing)

Altitude: 2000m Maximum

Degree of Protection: IP65

IP54 with internal reference air pump

Case Size: 315mm (12.4”) wide, 190mm (7.5”) high, 110mm (4.3”) deep

Case Weight: 3.3 Kg (7.3 lbs.)

WARNING: All signal level connections onto the transmitter must be treated as safety extra-low

voltage (SELV) as defined in the standard IEC61140. Double insulation must be used when

connecting these terminals to systems that might carry high voltage.

Operators Manual January 2020

81738 Dew Point Transmitter

3.2 Operational Specifications

Range of Analog Outputs: Field selectable from the following:

Function

Min Range

Max Range

Probe 1 or 2 Dew Point

20°C

-60°C to 40°C

Average Dew Point **

20°C

-60°C to 40°C

Probe 1 or 2 Linear Oxygen

0 to 100%

Average Oxygen **

0 to 100%

Probe 1 or 2 Reducing Oxygen

2 decades

1x10-30% to 100%

Average Reducing Oxygen

2 decades

1x10-30% to 100%

Probe 1 or 2 Pre-Reactive Oxygen

0 to 10%

Average Pre-Reactive Oxygen

0 to 10%

Probe 1 or 2 EMF

100mV

0 to 1300mV

Aux TC Temperature

100°C

0 to 1400°C

No Output

Output 1 transmits process variables for Probe 1, Output 2 transmits process variables for Probe 2 if

enabled, otherwise Probe 1. Output ranges for averaged process variables are only available when

transmitter is configured with two probes are enabled.

Local Display, Top Line Selectable from the following:

Range

Probe 1 Dew Point

-60°C to 100°C

Probe 1 Pre-Reactive Oxygen

0 to 10.0%

Probe 1 Oxygen

1x10-30 to 100%

Local Display, Secondary Functions:

Process Variable

Range

Probe 1 Dew Point

-60°C to 100°C

Probe 2 Dew Point **

Average Dew Point **

Probe 1 TC Temp

Up to 1760°C/3200°F

Probe 2 TC Temp **

Probe 1 EMF

-30 to 1350mV

Probe 2 EMF **

Probe 1 Impedance

0 to 300k Ω

Probe 2 Impedance **

Probe 1 Oxygen %

1x10-30 to 100%

Probe 2 Oxygen % **

Average Oxygen % **

Probe 1 Pre-Reactive Oxygen

0 to 10.0%

Probe 2 Pre-Reactive Oxygen **

Average Pre-Reactive Oxygen **

Auxiliary TC Temp

Up to 1760°C/3200°F

Ambient Temperature

0 to 70°C

Ambient RH%

5 to 95%

Flue Pressure

varies

Runtime

Service Date

4-20mA Output 1

0 to 24.0mA

4-20mA Output 2

** Process variables for second probe or averaging of two probes are only available when the transmitter is

configured with two probes enabled.

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