MDA Scientific midas Instructions Manual

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TO X I C , F L A M M A B L E

A N D O X Y G E N G A S D E T E C T O R

O P E R A T I N G I N S T R U C T I O N S

TABLE OF CONTENTS

1 Table of contents

2 General description

3 Product overview

3.1 Main chassis 6

3.1.1 Display module 6

3.1.2 Pump module 7

3.1.3 Sensor cartridge chamber 7

3.2 Mounting bracket assembly 7

3.2.1 Mounting bracket 7

3.2.2 Terminal module 7

3.3 Sensor cartridge 8

3.3.1 Biased sensor cartridges 8

3.4 Cover 8

4 Default configuration 9

5 Installation 9

5.1 Mounting and location of detector 10

5.2 Mechanical installation 11

5.3 Sample and exhaust tubing calculations 12

5.4 In-line filters 13

5.5 Local detector option 14

5.6 Electrical installation 15

5.7 Electrical connections 17

5.8 Refitting the main chassis 18

5.9 Installing the sensor cartridge 19

6 Detector start up procedures 19

7 General operation 21

7.1 Normal operation mode

7.1.1 Resetting alarms, faults and maintenance faults 22

7.2 Review mode

7.2.1 Review mode menu overview

7.3 Overview of set-up, calibration and test mode 24

7.3.1 Set-up menu overview

7.3.2 Calibration menu overview ‘

CAL’ 26

7.3.3 Test menu overview ‘

tESt’ 27

8 Detailed procedures for navigating review, set-up, calibration and test mode submenus 28

8.1 Review mode 28

8.1.1 Review software ‘SW’ 28

8.1.2 Review alarms ‘

ALm’ 29

8.1.3 Review faults ‘

FLt’ 29

8.1.4 Review calibration ‘

CAL’ 29

8.1.5 Review date and time ‘timE’ 29

8.1.6 Review detector address ‘

nEt’ 30

8.1.7 Review event log ‘

Hi St’ 30

8.2 Set-up, calibration and test modes 30

8.2.1 Set-up menu ‘

8.2.2 Set alarms ‘

8.2.3 Set faults ‘

8.2.4 Set calibration interval ‘

8.2.5 Set date and time ‘timE’

8.2.6 Set address ‘

8.2.7 Set pass code ‘

8.3 Calibration menu ‘

8.3.1 Zero calibration ‘

8.3.2 Span calibration ‘

8.3.3 Flow calibration ‘

SEt’ 31

ALm’ 31

FLt’ 34

CAL’ 34

nEt’ 35

PWd’ 36

CAL’ 36

0CAL’ 36

SPAn’ 37

FLoW’ 38

8.3.4 mA calibration ‘mA 4-20’ 38

8.4 Test menu ‘

8.4.1 Bump test ‘

8.4.2 Alarm/fault test ‘

8.4.3 Inhibit state ‘

tESt’ 39

bUmP’ 39

Si m’ 39

I nH’ 40

9 Routine maintenance 41

9.1 Sensor Cartridge Replacement 41

9.1.1 Sensor cartridge fitting/replacement 41

9.2 Pump replacement 43

9.3 Re-assembling the detector 46

9.4 Filter replacement 46

10 Pyrolyzer module option 47

10.1 Fitting the pyrolyzer module 48

10.2 Re-assembling the MIDAS

detector 49

11 Analog module 51

11.1 Fitting the analog module 51

11.2 Re-assembling the MIDAS

detector 52

12 Trouble shooting and fault diagnosis 53

13 REFLEX

14 Internal web server 54

14.1 Physical network components 54

14.2 Internet settings 54

14.3 Running the web browser 54

15 Typical installation topologies 56

15.1 Conventional installation 57

15.2 Modbus/TCP installation 57

15.3 Power over Ethernet (PoE) installation 57

16 Ordering information 58

16.1 MIDAS

16.2 MIDAS

16.3 MIDAS

transmitter 58

pyrolyzer 58

analog input module 58

16.4 MIDAS® plug in sensor cartridges (standard warranty) 59

16.5 MIDAS

plug in sensor cartridges (extended warranty) 60

16.6 MIDAS

complete gas detector kits 61

16.7 Accessories and spares 61

17 General specifications 62

18 Calibration and bump testing 63

19 Warranty statement 67

20 Software menu state charts 69

20.1 Top level 69

20.2 Review mode 70

20.3 Review software info, alarm, fault and gas calibration 71

20.4 Review date/time and network 72

20.5 Review event log 73

20.6 Set-up mode 74

20.7 Set-up alarm, fault and gas calibration 75

20.8 Set-up date/time and network 76

20.9 Set-up pass code 77

20.10 Calibration mode 78

20.11 Calibration gas zero and span 79

20.12 Calibration - Flow calibration 80

20.13 Calibration - 4-20 mA 81

20.14 Test mode 82

20.15 Test bump, alarm/fault simulation 83

20.16 Test inhibit 84

21 Contact details 85

2 GENERAL DESCRIPTION

The MIDAS

gas detector is an extractive gas sampling system that draws a sample locally or from a remote point to a sensor cartridge that is located inside the detector’s chassis. A wide range of toxic, flammable and oxygen gas sensor cartridges are available that enable detection of gases used or generated in the Semiconductor and other manufacturing industries.

MIDAS

is wall mounted and displays gas concentration, alarm, fault and status information via its backlit LCD and LEDs. A simple to use 4-button keypad located under the display provides the facility to set-up, review, operate and make changes to the detector’s configuration.

MIDAS

has flexible power and communications capabilities built in as standard. These include 3 on board relays, 0-22 mA analog output, Modbus/TCP outputs for signal and service connectivity as well as the innovative Power over Ethernet (PoE) protocol that enables a single Ethernet connection to be made for all power, control and communication requirements.

3 PRODUCT OVERVIEW

The MIDAS

gas detector comprises of 4 parts: the main chassis, the mounting bracket assembly, the sensor

cartridge and the unit cover. Diagram 1 details the MIDAS

general arrangement. Additionally, there is an

optional Pyrolyzer module required for the detection of NF

and an optional Analog module for the connection of

external 4-20 mA devices. Please refer to section 10 and 11 respectively for details of these options.

Main chassis

Unit cover

Sensor cartridge

Mounting bracket assembly

Diagram 1. MIDAS® general arrangement exploded view

3.1 Main Chassis

The main chassis comprises of the display module, pump assembly, and plug in sensor cartridge chamber.

Diagram 2. Main chassis

Pump module

Display module

Sensor cartridge chamber

3.1.1 Display module

The display module is located at the front of the main chassis and consists of a large alphanumerical and graphical backlit LCD, 3 LED indicators and a 4-button keypad. Under normal operation the LCD and LEDs display gas concentration, alarm and system status. In set-up, review, calibration and test modes, the LCD shows the relevant menu options. These menus are simply navigated using the ‘

▲’ up, ‘

▼’ down, ‘

✓’ accept and ‘X’

cancel buttons.

1. Red alarm LED

2. Normal operation icon

3. Review mode icon

4. Green power LED

5. Set-up mode icon

6. Calibration mode icon

7. Yellow Fault LED

8. Test mode icon

9. Gas concentration and message display area

10. Displayed units

11. Pass code icon

12. Accept button

13. Address icon

14. Network icon

15. Inhibit icon

16. Fault icon

17. Up button

18. Alarm level 1 icon

▲

Alarm level 2 icon (For flammable and toxic) O

deficiency alarm icon

▼

excess alarm icon

▲

19. Cancel button

20. Zero

and Span

calibration icons

21. Flow indicator

Diagram 3. MIDAS

display module layout

3.1.2 Pump Module

The pump module is located at the back of the main chassis. It draws the gas sample from the inlet port located at the bottom of the mounting bracket assembly via an inline filter to the sensor cartridge chamber located at the front of the main chassis. The sample is then exhausted via the exhaust port located at the bottom of the mounting bracket assembly. The pump and filter assemblies are designed for easy replacement. For replacement details refer to sections 9.2 and 9.4 respectively.

3.1.3 Sensor Cartridge Chamber

The sensor cartridge chamber is located at the front of the main chassis below the display module. The plug in sensor cartridge is fitted into this area which makes the electrical connection between the sensor cartridge and the rest of the electronics as well as providing the chamber where the sensor cartridge is exposed to the sampled gas. For details of fitting sensor cartridge refer to section 5.9.

3.2 Mounting Bracket Assembly

The mounting bracket assembly comprises of the detector mounting bracket, the terminal module, the gas sample inlet and outlet ports, the cable/conduit entry and Ethernet communications socket.

Diagram 4. Mounting bracket assembly

Mounting bracket Terminal module

Cable entry

Gas inlet port

Ethernet/PoE socket

Gas outlet port

3.2.1 Mounting Bracket

The metal mounting bracket has two slots that allow the detector to be easily mounted to a wall using two suitable screw fixings. For further details of mounting the detector refer to section 5.

3.2.2 Terminal Module

The terminal module is located on the mounting bracket. All electrical connections to MIDAS

are made via this module. Wire entry to the terminal module area is via the PG16 cable entry/conduit entry located at the bottom of the mounting bracket assembly.

3.3 Sensor Cartridge

A wide range of toxic, flammable or oxygen sensor cartridges can be fitted to MIDAS

. The plug in sensor cartridges are fitted in the sensor cartridge chamber at the front of the main chassis. To access the chamber the unit cover is removed by unscrewing the thumbscrew located at the front of the detector. The pre calibrated smart sensor cartridges can easily be fitted or replaced as they simply plug into the detector without the need for any tools. The sensor cartridge is firmly held in place by two locking tabs.

Diagram 5. Sensor cartridge

Front Back

Connector

Locking tabs

3.3.1 Biased Sensor Cartridges

Some sensor cartridges are shipped with a battery powered electrical supply in order to keep the cell effectively ‘warmed up’ and ready to monitor once installed in the MIDAS

unit. Bias cells are supplied for TEOS, NO and

. The bias circuit is removed just before insertion into the MIDAS

system and the sensor cartridge is thus ready

for effective gas detection.

Should a bias voltage not be applied (e.g. during a power failure) then the cell will take a longer time to recover before effective gas detection can take place. The longer the loss of applied power, the longer the recovery time. Refer to the relevant sensor cartridge data sheet for information on each sensor cartridge.

In order to avoid the risk of loss of gas detection due to unforeseen power loss, we recommend that a power management solution such as uninterruptible power supplies, battery back ups etc. are used.

NOTE: Sensor warranty is void if the sensor cartridge is opened by unauthorized user.

3.4

Cover

The cover provides environmental protection and fits over the top, front and sides of the main chassis. The front panel has viewing windows for the LCD, LEDs and sensor cartridge fitted in the sensor cartridge chamber. Underneath the LCD window are the 4 push buttons used for navigating the detector’s software menus. The cover is easily removed to allow access to the chassis by unscrewing the thumbscrew on the front panel and pulling the cover forwards off the main chassis.

Diagram 6. MIDAS

cover

LED windows

LCD window

Push buttons

Sensor cartridge viewing window

Thumbscrew

4 DEFAULT CONFIGURATION

5 INSTALLATION

For ease of installation MIDAS

has been designed to allow the installation of the mounting bracket assembly and terminal module separately from the other parts of the detector. The detector location and hard wiring can therefore be completed before fitting the detector’s main chassis and sensor cartridge.

WARNING

MIDAS

is designed for installation and use in indoor safe area non-explosive atmospheres. Installation must be in accordance with the recognised standards of the appropriate authority in the country concerned. Prior to carrying out any installation ensure local regulations and site procedures are followed.

As standard, the MIDAS® gas detector is factory configured as below:

Table 1. MIDAS

default configuration

Current source with:

Full Scale (FS)

Lowest Alarm Level

(LAL)

Lower Detectable

Limit (LDL)

Alarm Relay 1

Alarm Relay 2

Fault Relay

Latching

Pass code

0 mA

1.0 mA

3.0 mA

4.0 to 20.0 mA

2.0 mA

Fault (open circuit)

Fault

Maintenance Fault

Gas reading (normal operation)

Inhibit (test mode)

21.0 mA Over range

Toxic Gas Flammable Gas

Typically 4 x Toxic

Threshold Limit (TLV)

100% Lower Explosive

Limit (LEL)

Oxygen

25% Volume (v/v)

Typically 1/2 TLV 10% LEL 5% v/v

Typically 0.4 TLV 9% LEL 0% v/v

The LDL is the minimum level that is reliably distinguishable from zero.

Alarm level 1 of 1/2 TLV 10% LEL 23.5% v/v (Rising)

Normally de-energized, energizes on alarm.

Contact Normally Open (NO), closes on alarm.

Alarm level 2 of TLV 20% LEL 19.5% v/v (Falling)

Normally de-energized, energizes on alarm.

Contact Normally Open (NO), closes on alarm.

Normally energized, de-energizes on fault.

Contact Normally Open (NO).

Non latching. Alarm and fault relays automatically reset when reading falls

below alarm thresholds or fault clears.

No pass code set.

MIDAS

detectors are not ETL approved for monitoring in or sampling from classified areas above 25% LEL

5.1 Mounting and Location of Detector

The MIDAS

gas detector has an integral mounting bracket assembly that is easily mounted to a suitable vertical

surface such as a wall, tool housing, mounting plate on a pole etc.

Nitrogen Trifluoride

NF3

FS: 4-40 PPM PN: MIDAS-X-HFX SN: 2564-0243 Expires: Nov2006

zellweger analytics

GAS DETECTOR

midas

5.91 [150.00]

4.72 [120.00]

2.48 [63.00]

Diagram 7. MIDAS® outline dimensions

Drill Template

Drill 2 x M4 holes

58.50mm (2.3”)

Below are some considerations when installing the MIDAS® Gas Detector:

1. Mount the detector on a surface that is flat, firm and suitable for its size and weight.

2. Use the drill template supplied to drill the holes for the fixings.

3. Use fixings appropriate for the surface being mounted to.

4. Ensure the head size of fixings used will not snag the terminal PCB.

5. Consider the conduit/cable weight and its stress on the installation.

6. Position the detector so that it can be easily accessed.

7. Position the detector so that it is at a suitable height (normally eye level) for the display to be clearly seen.

8. Take into consideration the space required to remove the detector’s cover and locking/unlocking the sensor cartridge locking clips.

9. Take into consideration the space required for sample inlet and exhaust tubing (for remote monitoring), and for the inlet filter (for local monitoring).

10. Take into consideration the space required for cable or conduit access.

5.2 Mechanical Installation

The following steps and diagrams show how to separate the mounting bracket assembly from the main chassis and mount it on a vertical flat surface.

1. Unscrew the thumbscrew located on the front panel.

2. Remove the cover by pulling it forwards off the main chassis.

3. Unscrew the two retaining screws located at the bottom front of the chassis.

4. Holding the mounting bracket assembly with one hand use the other to carefully pull the main chassis forwards to disconnect it from the mounting bracket assembly.

Using the drill template provided drill two holes 58.50 mm vertically apart for 2 x round head M4 fixing screws.

6. Partially screw the fixings into the mounting surface.

7. Place the mounting bracket assembly over the screws so they pass through the mounting holes and then slide down to locate in the slots.

8. Tighten the screws to secure the mounting bracket assembly.

Diagram 8. Mechanical installation

5.3 Sample and exhaust tubing calculations

The following tables show the flow rate, tubing length, transport time, and maximum pressure and vacuum at the inlet and exhaust points.

Table 2. Inlet sample specifications

Inlet Sample Specifications:

Maximum

Tubing Length, m (ft)

30 (100) 20 (66) 10 (33)

Transport Time (sec)

28 19 10 1

Sample Point Vacuum (Negative pressure)

-25.4 cm H

O (-10 in H2O) Maximum

Flow rate, cc/min.

500 (Flow is constant)

Tubing OD, mm (in)

6.35 (0.25)

Tubing ID, mm (in)

3.18 (0.125)

NOTE: The flow rate is electronically maintained at 500 cc/min

Table 3. Outlet sample specifications

Outlet Sample Specifications:

Maximum

Tubing Length, m (ft)

30 (100) 20 (66) 10 (33)

Back Pressure at Exhaust Point (Excluding tubing)

20.3 cm H

O (8 in H2O) Maximum

Tubing OD, mm (in)

6.35 (0.25)

Diagram 8. Mechanical installation

ATTACHING BRACKET TO SCREWS ON A WALL

mounting bracket

screws

5.4 In-line filters

External filters must be used to protect the tubing from contamination. Use particulate filter part number 0780248 for normal gases and 1830-0055 for corrosive gases. Replace the filter every 3 months. Refer to the table below for specific gases.

Target Gas

Recommended

maximum sample

line (m)

End of line

particulate filter

(P/N 0780248)

End of line particulate

Teflon filter

(1830-0055)

Ammonia

10 YES **

Arsine

30 YES **

Boron Trichloride

5* NO YES

Boron Trifluoride

5* NO YES

Bromine

10 NO YES

Carbon Dioxide

30 YES **

Carbon Monoxide

30 YES **

Chlorine

10 NO YES

Chlorine Dioxide

10 NO YES

Chlorine Trifluoride

5* NO YES

Diborane

30 YES **

Dichlorosilane

5* NO YES

Disilane

10 YES **

Fluorine

10 NO YES

Germane

30 YES **

Hydrogen (% LEL)

30 YES **

Hydrogen (ppm)

30 YES **

Hydrogen Bromide

5* NO YES

Hydrogen Chloride

5* NO YES

Hydrogen Cyanide

10 YES **

Hydrogen Fluoride

5* NO YES

Hydrogen Selenide

30 YES **

Hydrogen Sulfide

30 YES **

Methane (% LEL)

30 YES **

Nitrogen Dioxide

30 NO YES

Nitrogen Oxide

30 YES **

Nitrogen Trifluoride

30 YES **

Oxygen Proficiency & Deficiency

30 YES **

Ozone

5 NO YES

Phosphine

30 YES **

Phosphorous Oxychloride

5* NO YES

Table 4. In-line filter recommendations

Target Gas

Recommended

maximum sample

line (m)

End of line

particulate filter

(P/N 0780248)

End of line particulate

Teflon filter

(1830-0055)

Silane

30 YES **

Silane (low level)

30 YES **

Sulfur Dioxide

30 NO YES

Sulfur Tetrafluoride

5* NO YES

Tetra Ethyl Ortho Silicate

30 YES **

Tungsten Hexafluoride

5* NO YES

5.5 Local Detector Option

The MIDAS

gas detector can also be used to monitor for gas at the location of the detector. To do this an inline filter is simply connected to the sensor cartridge gas inlet port. The external dust filter part number is 780248 for normal gases and 1830-0055 for corrosive gases. The area around the detector is then being monitored as opposed to a sample being drawn from a remote location.

Diagram 9. Local gas detector option

MIDAS-T-001 transmitter installed with in line particulate filter for local ambient monitoring mode

* Recommend to keep the sample lines as short as possible where the RH condition at the sample point is high (above <50%RH); there will be some sample loss due to absorption onto the sample line. ** These gases can use either filter.

Table 4. In-line filter recommendations (cont.)

5.6 Electrical Installation

The terminals used are suitable for conductors of 24 to 14 AWG (0.5 to 1.8mm Dia.). The use of 16 AWG (1.5 mm Dia.) conductors is recommended.

NOTE: When powered by Power over Ethernet (PoE) the 3 on board relays do not require separate 24 VDC to be energized

If Power over Ethernet (PoE) is used to power the device, then 24 VDC power must not also be connected to the device, (or conversely if 24 VDC is used to power the MIDAS

, then electrical power via the Ethernet port must not be applied). Failure to observe this requirement may cause damage to the gas detection system and will not be covered by the standard warranty.

When connecting the wires ensure that the power switch is in the off position.

Diagram 11 shows the terminal module layout and terminal identification as well as the jumper locations. Diagnostic LED lamps are positioned on the internal main chassis for ease of viewing. These indicate that Ethernet communication activity is active. In some versions of MIDAS

the rear mounted Power over Ethernet port

has two LED status lamps; note that these are not utilized and do not illuminate.

24V DC

RELAYS

OUT

COM

EXT INT

CABLE GLAND

WIRES

RJ45 CONNECTOR

Access for the electrical wires to the terminal module is made via the PG16 cable gland located at the bottom of the mounting bracket assembly. The cable gland can be removed and replaced with a suitable conduit fitting if required. The wire routing of a typical installation is shown in the diagram below.

Diagram 10. Typical wire routing

ANALOG OUTPUT

ALM 1

ALM 2

24V DC IN

0V DC COM

Diagram 11. MIDAS® terminal layout and identification

See relay function table below

Display Description Relay 1 Relay 2 Relay 3

1FLt

Instrument Fault

Only

Alarm 1 Alarm 2 Instrument Fault

2Flt

Separate Fault

Relays

Any Alarm Maintenance Fault Instrument Fault

CmbF

Combined Fault

Relay

Alarm 1 Alarm 2 Any Fault

NOTE: EARTHING REQUIREMENTS

If the MIDAS® unit metal chassis is not connected directly to a metal surface for earthing purposes, an additional earth wire will be required. Connect a wire via the PG16 gland to the dedicated earth tag (screw terminal) located on the bottom bracket and connect the other end of the wire to a dedicated external earthing point.

If Power over Ethernet (PoE) power supply is being used, shielded CAT5 ethernet cable is recommended.

Please ensure that your wiring avoids earth ground loops that may affect the performance of your equipment.

5.7 Electrical Connections

Diagram 14. Example MIDAS® and 5704 connection

Diagram 15. Example MIDAS® and 5701 connection

Diagram 16. Generic example MIDAS

4-wire isolated output

Diagram 17. Generic Example MIDAS

3-wire sourcing output

Diagram 12. Example MIDAS® and Touchpoint 1 connection

Diagram 13. Example MIDAS® and Touchpoint 1 connection

MIDAS

can be powered by either 24 VDC via traditional discrete wiring or by approximately 48 VDC delivered through the Ethernet cable from a PoE source. In either case the 4-20 mA analog output can be used. This can be configured for sinking, sourcing or isolated operation. Below are some schematic diagrams of typical electrical connection configurations.

Diagram 18. Generic example MIDAS

3-wire sinking output

5.8 Refitting the Main Chassis

The main chassis can be refitted to the mounting bracket assembly using the following steps.

1. Align the PCB at the top rear of the main chassis with the connector located at the top of the mounting bracket assembly

2. At the same time align the two tubes at the bottom rear of the main chassis with the two tubes located on

the bottom of the mounting bracket assembly.

3. Slide the chassis backwards on the mounting bracket assembly so that the PCB and connector and tubes

engage simultaneously. (See diagram below).

4. Ensure the PCB, connector and tubes are fully engaged by firmly pushing the main chassis horizontally

backwards on the mounting bracket assembly (WARNING: DO NOT PUSH ON THE LCD AS THIS MAY CAUSE DAMAGE).

5. Align the two fixing screws located at the bottom of the chassis with the screw threads on the mounting

bracket assembly.

6. Tighten the screws to secure the chassis to the mounting bracket assembly.

Diagram 19. Refitting the chassis.

Diagram 19. Generic Example MIDAS® sourcing 4-20 mA with PoE power

Diagram 20. Generic example MIDAS

isolated 4-20 mA

output with PoE power

5.9 Installing the Sensor Cartridge

The MIDAS

sensor cartridge is supplied separately and needs to be fitted to the detector’s main chassis. The following steps and diagrams detail the procedure for installing the sensor cartridge for the first time. This procedure is carried out with the power off and the detector cover removed.

1. Remove sensor cartridge from packaging

2. Check the part number and type of sensor cartridge is correct.

3. Check the activate by date.

4. Align the pins at the top of the sensor cartridge with the socket in the sensor cartridge chamber.

5. Carefully push the sensor cartridge into the sensor cartridge chamber until fully home.

6. Lock the sensor cartridge in place using the tabs either side of the sensor cartridge to lock the sensor cartridge to the main chassis.

7. Switch the power switch located on the terminal module to the ‘on’ position.

8. Refit the detector’s cover by aligning the slots either side with the locating tabs on the mounting bracket assembly.

9. Push the cover horizontally until home.

10. Tighten the thumbscrew located on the front panel.

Diagram 20. Installing the sensor cartridge

6 DETECTOR START UP PROCEDURES

WARNING

Prior to carrying out any work ensure local and site procedures are followed. Ensure that the associated control panel is inhibited so as to prevent false alarms.

The following procedure should be followed carefully and only performed by suitably trained personnel.

1. Ensure the detector is wired correctly according to sections 5.6 and 5.7.

2. Ensure that the correct sensor cartridge is fitted. (If the cartridge has not been stored at room temperature, allow one hour for equilibration.)

3. Ensure the on/off switch on the mounting bracket assembly is in the on position.

4. Apply power to the system.

5. After the start up routine the detector will display normal operating mode as shown in section 7.

6. If using a multi gas sensor cartridge refer to section 8.2.2 to ensure the correct gas id code is selected.

7. Allow the detector to stabilize using the table over to determine the maximum sensor cartridge warm up time.

idas

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S-S-

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HOW CARTRIDGE IS FITTED

chassis

cartridge

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NITROG

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R I F

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I DE

D A

S-

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slots

tighten

HOW COVER IS FITTED

tabs

cartridge fitted

Sensor Cartridge Family

Sensor Cartridge Part No.

Gas Name

Maximum

Warm-up

Time

(minute)

Ammonia

MIDAS-S-NH3

Ammonia 10

Hydrides

MIDAS-S-ASH

Arsine 20

MIDAS-S-HYD Diborane, Germane

MIDAS-S-PH3

Phosphine 20

MIDAS-S-SHX Silane (20 ppm), Disilane

MIDAS-S-SHL Silane (2 ppm)

MIDAS-S-HSE Hydrogen Selenide

Mineral Acid (HF)

MIDAS-S-HFX

Hydrogen Fluoride, Boron Trifluoride, Nitrogen Trifluoride, Tungsten Hexafluoride

MIDAS-S-SF4 Sulfur Tetrafluoride, Chlorine Trifluoride

Mineral Acid (HCl)

MIDAS-S-HCL

Hydrogen Chloride, Boron Trichloride, Dichlorosilane, Hydrogen Bromide

MIDAS-S-POC Phosphorous Oxychloride

Halogens

MIDAS-S-HAL Chlorine, Fluorine

MIDAS-S-BR2 Bromine, Chlorine Dioxide

Carbon Dioxide

MIDAS-S-CO2 Carbon Dioxide

Carbon Monoxide

MIDAS-S-COX Carbon Monoxide

Hydrogen

MIDAS-S-H2X

Hydrogen 10

Hydrogen Cyanide

MIDAS-S-HCN Hydrogen Cyanide

Hydrogen Sulfide

MIDAS-S-H2S Hydrogen Sulfide

Nitric Oxide

MIDAS-S-NOX Nitric Oxide

Nitrogen Dioxide

MIDAS-S-NO2 Nitrogen Dioxide

Oxygen

MIDAS-S-O2X

Oxygen 30

Ozone

MIDAS-S-O3X

Ozone 10

Sulfur Dioxide

MIDAS-S-SO2 Sulfur Dioxide

TEOS

MIDAS-S-TEO

TEOS 10

Flammables

MIDAS-S-LEL Hydrogen, Methane

Table 5. Sensor cartridge warm up times

7 GENERAL OPERATION

After applying power to the detector, the display will go through a start up test routine illuminating in sequence all the LEDs, icons and digits of the display. The display will show the message ‘WAIT’ and ‘LOAD’ as it checks for cartridge data. It will then display the message ‘WARM’ until the sensor cartridge to reaches operating temperature. When complete the detector will enter normal monitoring mode indicated by the ‘ ’ icon on the display cycling through three states (2 rings, 3 rings, 4 rings). The measured gas concentration will be shown on the display and transmitted on the 4-20 mA output. The green LED will flash once every second indicating power and the sample flow rate indicator will be displayed. If monitoring is interrupted due to a fault, a test or calibration process or a user requested inhibit, the ‘ ’ icon will flash. For details of fault and maintenance fault codes refer to section 12.

Final Start Up Routine Screen Normal Operation

7.1 Normal Operation Mode

In this mode the detector displays gas concentration, alarm, fault and status information via its backlit LCD and front panel LEDs. Typical normal operation display and output states are shown below. See Section 12 for a full list of fault codes.

NOTE: The examples below are for a linear 4-20 mA output over a full scale range of 2 ppm. The current output for a given gas concentration will be different for other full scale ranges (linear 4 mA = 0 % full scale to 20 mA = 100 % full scale).

See section 12 for a full list of fault codes.

Operational State Relay status 4-20 mA output

(for 2ppm range)

LEDs Display*

Normal operation Alarm relay 1

de-activated

Alarm relay 2 de-activated

Fault relay activated

4 mA Green slow flash

Alarm 1 Alarm relay 1

activated

Alarm relay 2 de-activated

Fault relay activated

6 mA

Green slow flash

Red on

Table 6. Normal operation display and output states.

Table 6. Normal operation display and output states. (cont.)

Operational State Relay status 4-20 mA output

(for 2ppm range)

Alarm 2 Alarm relay 1

de-activated

Alarm relay 2

8 mA

activated

Fault relay activated

Greater than full scale

Alarm relay 1 activated

Alarm relay 2

21 mA

activated

Fault relay activated

Inhibit Alarm relay 1

de-activated

Alarm relay 2

2 mA Green slow flash

de-activated

Fault relay activated

Low flow rate Alarm relay 1

de-activated

Alarm relay 2

3 mA

de-activated

LEDs Display*

Green slow flash

Red fast flash

Green slow flash

Red fast flash

Green slow flash

Yellow on

Fault relay activated

Low flow fault Alarm relay 1

de-activated

Alarm relay 2 de-activated

Fault relay

1.0 mA

Green slow flash

Yellow fast flash

de-activated

7.1.1 Resetting Alarms, Faults and Maintenance Faults

The alarm relay function of MIDAS

can be set to latching (see set-up mode) so that when an alarm occurs the associated relay remains activated even if the gas reading has dropped below the alarm level. To reset the latched alarm relay press the ‘X’ cancel button for 2 seconds. If the gas level is still above the alarm point you can reset the associated relay but it will activate again after the elapse of any alarm on delay that has been set.

The fault relay function can also be set to latching. It can be reset by pressing the ‘X’ cancel button only if the fault condition has cleared. The fault relay cannot be reset if the fault condition is still present.

The maintenance faults that are displayed on the LCD follow the latching or non-latching function set for the fault relay. If the fault relay operation is set to non-latching, the display will automatically clear a maintenance fault message when the maintenance fault condition is cleared. If set to latching the maintenance fault message can be cleared by pressing the ‘X’ cancel button only if the maintenance fault condition has cleared.

7.2 Review Mode

The detector settings can be reviewed safely without the possibility to make changes by using review mode. To select review mode press the ‘

▲’ up or ‘▼’ down button once. The review mode icon ‘ ’ will show on the

display and the first review mode menu icon is displayed.

Review

Submenu

➭

Software

✓

Displays software

revision

✓

Displays

software

checksum

✓

Press ▲ or ▼ to select next

menu or X

to exit

Alarms

✓

Displays

sensor

cartridge

ID (X) and gas ID code (Y) in format

(X -Y)

✓

Level 1 (L1)

rising (U) or

falling (d)

alarm type

followed by set point then same for level

(L2) alarm

✓

Alarm time delay (secs)

✓

Alarm relays

latching (L) or

non latching

(nL)

✓

Alarm relays

normally

energized (nE)

or normally

de-energized

(nd)

✓

Press ▲ or ▼ to select next

menu or X

to exit

Faults

✓

Fault relay

configuration

✓

Fault relay

latching (L) or

non latching

(nL)

✓

Fault relay

normally

energized (nE)

or normally

de-energized

(nd)

✓

Press ▲ or ▼ to select next menu or X

to exit

Calibration

✓

Days

remaining

to next

calibration

due

✓

Year of last

calibration

✓

Month and

day of last

calibration

✓

Press ▲ or ▼ to select next

menu or X

to exit

Date/Time

timE

✓

Year

✓

Date

✓

Time

✓

Press ▲ or ▼ to select next

menu or X

to exit

Address

✓

Auto address detect (AU Y)

or manual set

(AU n)

✓

IP address

segments

(x4)

✓

Sub net

address

segments

(x4)

✓

Press ▲ or ▼ to select next

menu or X

to exit

Event Log

✓

Number

of dots on

display shows

number of

viewable

events (0-7)

✓

Date of first

event

✓

Time of event

✓

Icon and

event code

✓

Repeat for

next event or

X to exit

▲ ▼

➭

Table 7. Review menu overview.

7.2.1 Review Mode Menu Overview

The menu is simply navigated by using the ‘▲’ up and ‘▼’ down buttons to select the required menu, and then using the ‘

✓’ accept button to enter that submenu and scroll through to view the settings. The ‘X’ cancel button can be used to exit the submenu and allow selection of a different submenu, or can be pressed again to exit to normal operating mode. When in review mode the unit will automatically return to the main normal operation status display if either an alarm level is exceeded or no button is pressed for 60 seconds.

The table below shows an overview of the different review menus and how they are navigated. For a detailed step-by-step instruction of how to review the detector setting in review mode refer to section 8.1.

7.3 Overview of Set-up, Calibration and Test Mode

WARNING: Set-up, calibration and test modes are intended for use by trained personnel or service engineers only. Access to these modes can be pass code protected by following the procedure in section

8.2.7.

Set-up, calibration and test modes are used to make setting changes, calibrate and test the detector. To select set-up, calibration and test mode press and hold the ‘

▲’ up button or ‘▼’ down button for a second. The unit will automatically go to the main normal operation status display from setup/calibration/test menus (but not from inside a setup/calibration/test function) if no button is pressed for 5 minutes or if an alarm level is exceeded.

PASS CODE: If a pass code has been set the display will show 0000 with the first 0 flashing. Use the ‘

▲’ up or ‘▼’ down buttons to set the first digit of the pass code. Press ‘✓’ to enter the first digit. The second digit will then flash. Repeat the process until all four pass code digits have been entered. Please record your pass code in a separate archive that can be securely retrieved. Failure to be able to retrieve your pass code may lead to delays in gaining access to all the protected functions in each MIDAS

unit. If an incorrect code is entered the display will show ‘Err’ and return to the normal operation mode. If a pass code is forgotten contact your local Zellweger Analytics service department.

After successfully entering the pass code (if set) the first menu ‘

SET’ set-up icon will show on the display.

The ‘

CAL’ calibration or ‘ tESt’ test menu can also be selected using the ‘▲’ up or ‘▼’ down buttons.

Press the ‘

✓’ accept button to enter the selected menu or the ‘X’ cancel button to return to normal operation

mode.

7.3.1 Set-up Menu Overview

The set-up menu allows changes to be made to the detector alarm, fault, calibration interval, date/time and digital address settings. The menu is simply navigated using the ‘▲’ up and ‘▼’ down buttons to select the required submenu and then using ‘

✓’ accept button to enter that submenu. The ‘▲’ up and ‘▼’ down buttons

are used to make changes to the selected setting and are confirmed using the ‘

✓’ accept button. The ‘X’ cancel button can be used to exit the submenu and allow selection of a different submenu, or can be pressed again to exit to the main set-up, calibration and test menu. Pressing the ‘X’ cancel button again returns the detector to normal operating mode.

NOTE: All settings in a submenu are accepted when the ‘

✓’ accept button is pressed after the last submenu setting. This saves the changes and is indicated by displaying ‘UPdt’ on the LCD. If however the ‘X’ cancel button is pressed at any time before the changes are accepted, this will cause any changes to be cancelled in that particular submenu.

The table opposite shows an overview of the set-up submenus and how they are navigated. For a detailed step-by-step instruction of how to change the detector settings using the set-up menu refer to section 8.2.

Table 8. Set-up menu overview.

Set up

Submenu

▲ ▼

Alarms

✓

Change gas

ID code (only

for multi

gas sensor

cartridge)

✓

Set level 1

(L1) rising (U)

or falling (d)

alarm type. Set alarm set point. Repeat

for level (L2)

alarm

✓

Set alarm

time delay

(X-X secs)

✓

Set alarm

relays latching

(L) or non

latching (nL)

✓

Set alarm

relays

normally

energized (nE)

or normally

de-energized

(nd)

✓

Press ▲ or ▼ to select

next menu or

X for set-up,

calibration

and test

Faults

✓

Set fault relay configuration

(1FLt, 2FLt,

CmbF)

✓

Set fault relay

latching (L) or

non latching

(nL)

✓

Set fault relay

normally

energized (nE)

or normally

de-energized

(nd)

✓

Press ▲

or ▼ to select

next menu or X for set-up,

calibration and

test menu

Calibration

✓

Set calibration

interval

(0-365 days)

✓

Press ▲ or

▼ to select

next menu or

X for set-up,

calibration

and test menu

Date/Time

timE

✓

Set date format (dd: mm or mm:

dd)

✓

Set year

(2003-2030)

✓

Set month

(1-12)

✓

Set day (1-31)

✓

Set hours

(00-23)

✓

Set minutes

(0-59)

Press

▲

or ▼ to select next menu or X for set-up, calibration

and test

Set Address

✓

Set auto

address detect

(AU Y) or

manual set

(AU n)

✓

If AU Y,

address is

detected,

then returns

to set-up,

calibration

and test

menu. If AU n, set the first part of the IP

address (0-255)

✓

Repeat setting

address for 2nd, 3rd and 4th segments

of IP address.

✓

Set the 4 sub net addresses (0-255) using same method

✓

Press ▲ or

▼ to select

next menu or

X for set-up,

calibration

and test menu

Set Pass

Code

✓

Press ▲ or

▼ to set pass

code 1st digit

✓

Press ▲ or

▼ to set pass

code 2nd

digit

✓

Press ▲ or

▼ to set pass

code 3rd

digit

✓

Press ▲ or

▼ to set pass

code 4th digit

✓

Repeat to

confirm pass

code

✓

Pass code

saved if both

entries are

the same

▲ ▼

7.3.2 Calibration Menu Overview ‘ CAL’

The calibration menu allows calibration of the detector zero, span, flow and 4-20 mA. The menu is simply navigated using the ‘▲’ up and ‘▼’ down buttons to select the required submenu and then using ‘✓’ accept button to enter that submenu. The ‘

▲’ up and ‘▼’ down buttons are used to make any changes to a selected

setting and are confirmed using the ‘

The table below shows an overview of the calibration submenus and how they are navigated. For a detailed step-by-step instruction of how to change the detector calibration settings refer to section 8.2.

Calibration

submenu

▲ ▼

Zero

✓

Icon flashes alerting user to prepare to

apply zero gas

✓

Level 1 (L1)

rising (U) or

falling (d) alarm type followed by

set point then

same for level

(L2) alarm

➭

If ok ‘’PASS’’

is displayed. If

fail fault code

is displayed.

✓

Press ▲ or ▼ to select

next menu or

X for set-up,

calibration and

test menu

Span

✓

Select gas ID code of calibration

gas (for multi

gas ID sensor

cartridges only)

✓

Select if

humidified

‘HUm’ or

dry ‘drY’

calibration gas

✓

Adjust value

to display span gas

concentration

being used

➭

Display goes

steady and

displays span

gas reading.

The dots

indicate span

progress. If

ok ‘’PASS’’ is

displayed. If

fail fault code

is displayed

✓

Press ▲ or

▼ to select

next menu or

X for set-up,

calibration and

test menu

Flow

✓

Icon flashes and display

shows ‘0’

indicating that

flow zero will

be set

✓

Unit counts down from

10 to 0 and sets flow zero. Display shows

1st set point

target flow rate.

Use ▲ or ▼ to

make reading

on external

flow meter

350cc/min +/-

50cc/min

✓

Use ▲ or ▼

to change the

flashing display

to the actual

reading from

the external

flow meter

✓

Unit counts

down from 10

to 0 and sets

1st set point.

Icon flashes

and displays

2nd set point target. Repeat process to set.

✓

Press ▲ or

▼ to select

next menu or

X for set-up,

calibration and

test menu

4-20 mA

✓

4 mA is

displayed

indicating

analog output

should be

4 mA

➭

Adjust until

analog

output is

4 mA

✓

20 mA is displayed

indicating

analog output

should be

20 mA

➭

Adjust until

analog output

is 20 mA

✓

Press ▲ or

▼ to select

next menu or

X for set-up,

calibration and

test menu

▲ ▼

Table 9. Calibration menu overview.

7.3.3 Test Menu Overview ‘ tEST’

The test menu is used to test the detector gas reading using bump test gas, and for simulation of alarm and fault display and output operation. The test menu also contains the detector Inhibit facility. Use the ‘

▲’ up and ‘▼’

down buttons to select either bump test or alarm/fault test. Press the ‘

✓’ accept button to enter that submenu.

The table below shows an overview of the test submenus and how they are navigated. For a detailed step-by-step instruction of how to test the detector operation refer to section 8.2.

Test

Submenu

▲ ▼

Bump

✓

Apply bump

test gas and display shows measured gas concentration with all alarm

outputs inhibited

➭

Press ‘X’ to exit

to test menu

➭

Press ▲ or ▼ to select next

submenu or X

for to return

to the set-up,

calibration and

test menu

Alarm/fault

✓

Display shows ‘Sim’ and the

A1 ‘

▲’ symbol.

Select either

A1, A2 ‘

’ or

Fault ‘

’ for

simulation

✓

Display shows

‘SuRE’.

✓

Display flashes

‘on’ and

simulates the selected A1, A2 or Fault display

and output.

➭

Press x to exit

and select

another

simulation or x

again to return

to test submenu

➭

Press ▲ or ▼ to select next

sub menu or

X for set-up,

calibration and

test menu

Inhibit

✓

Press ▲ or ▼ to select ALm,

ALm-Ft, ALL

or nonE inhibit

state

✓

Set inhibit

timeout period

✓

UPdt is

displayed and

unit enters

selected inhibit

state. Display

returns to

submenu

➭

Press ▲ or ▼

to select next sub menu or

X for set-up,

calibration and

test menu

▲ ▼

Table 10. Test Submenu

8 DETAILED PROCEDURES FOR NAVIGATING REVIEW, SET-UP, CALIBRATION

AND TEST MODE SUBMENUS

The following sections provide step-by-step procedures for navigating all the modes and submenus.

8.1 Review Mode

Review mode allows the settings of the detector to be reviewed safely without any changes being made. Review mode consists of 7 submenus as shown in the table below:

Review submenu

Icon Settings Displayed

Software

SW Revision and checksum

Alarms

Sensor cartridge and gas ID codes, Alarm 1 and alarm 2 configuration and set points, time delay, latching/non latching, energized/de-energized

Faults

Configuration, Latching/non latching, energized/de-energized

Calibration

Days left to next calibration due and date of last calibration

Time/Date

timE Current year, date and time

IP address

Auto address selection on/off, IP address, sub net mask values.

Event log

View the date, time and details of the last seven alarm, fault and maintenance fault events

Table 11. Review mode submenus.

Review mode allows the settings of the detector to be reviewed safely without any changes being made. Review mode consists of 7 submenus as shown in the table below:

To select review mode from normal operation, press the ‘

▲’ up or ‘▼’ down button once. The icon will be

displayed along with the first submenu icon. Press the ‘

▲’ up or ‘▼’ down buttons to select a different submenu

icon.

8.1.1 Review Software ‘SW’

1. Select the software ‘SW’ submenu and press ‘

✓’ to accept.

2. The software version number is displayed.

3. Press ‘

✓’ to display the software checksum

4. Press ‘

✓’ to return to step 1.

5. Repeat steps 1 through 4 to view the information again or press ‘

▲’ up or ‘▼’ down to select another

submenu.

6. Press ‘X’ to return to normal operation

8.1.2 Review Alarms ‘ ALm’

1. Select the alarms ‘

Alm’ submenu and press ‘✓’ to accept.

2. The sensor cartridge ID (X) and the set gas ID code (Y) are displayed in the format (X – Y). (See section 8.2.2 for a list of sensor cartridge and gas ID codes).

3. Press ‘

✓’ to display if the level 1 alarm (L1) type is rising (U) or falling (d).

4. Press ‘

✓’ to display the alarm 1 value along with the A1 icon‘▲’.

5. Press ‘

✓’ to display if the level 2 alarm (L2) type is rising (U) or falling (d).

6. Press ‘

✓’ to display the alarm 2 value along with the A2 icon ‘ ’.

7. Press ‘

✓’ to display the alarm on delay (seconds).

8. Press ‘

✓’ to display if the alarm relays are set to latching (L) or non latching (nL).

9. Press ‘

✓’ to display if the alarm relays are set to normally energized (nE) or normally de-energized (nd).

10. Press ‘

✓’ to return to step 1.

11. Repeat steps 1 through 7 to view the settings again or press ‘

▲’ up or ‘▼’ down to select another submenu.

12. Press ‘X’ to return to normal operation.

8.1.3 Review Faults ‘

FLt’

1. Select the faults ‘

FLt’ submenu and press ‘✓’ to accept.

2. The fault relay configuration (1FLt, 2 FLt or CmbF) is displayed. (See section 8.2.3 for details of fault relay configurations).

3. The fault relay latching (L) or non latching (nL) setting is displayed.

4. Press ‘

✓’ to display the fault relay normally energized (nE) or normally de-energized (nd) setting.

5. Press ‘

✓’ to return to step 1.

6. Repeat steps 1 through 4 to view the settings again or press ‘

▲’ up or ‘▼’ down to select another submenu.

7. Press ‘X’ to return to normal operation.

8.1.4 Review Calibration ‘

CAL’

1. Select the review calibration ‘

CAL’ submenu and press ‘✓’ to accept.

2. The number of days remaining to the next calibration due date is displayed.

3. Press ‘

✓’ to display the year and press ‘✓’ again to display the month and day of the last calibration.

4. Press ‘

✓’ to return to step 1.

5. Repeat steps 1 through 4 to view the settings again or press ‘

▲’ up or ‘▼’ down to select another submenu.

6. Press ‘X’ to return to normal operation.

8.1.5 Review Date and Time ‘

timE’

1. Select the review date and time ‘timE’ submenu and press ‘

✓’ to accept.

2. The current year setting is displayed.

3. Press ‘

✓’ to display the current month and day

4. Press ‘

✓’ again to display the current time.

5. Press ‘

✓’ to return to step 1.

6. Repeat steps 1 through 5 to view the settings again or press ‘

▲’ up or ‘▼’ down to select another submenu.

7. Press ‘X’ to return to normal operation.

8.1.6 Review Detector Address ‘ nET’

1. Select the review address ‘

nEt’ submenu and press ‘✓’ to accept.

2. ‘AU Y’ or ‘AU n’ is displayed depending on if auto address detection is on (AU Y) or off (AU n).

3. Press ‘

✓’ to display the first part of the IP address preceded by the letter ‘A’.

4. The dot on the upper left indicates that the first part of the IP address is being displayed.

5. Press ‘

✓’ to display the second part of the address. The two dots on the upper left indicate the 2nd portion of

the address.

6. Press ‘

✓’ again to display the third part and again to display the last part of the address.

7. Press ‘

✓’ and the first part of the sub net mask values will be displayed preceded by the letter ‘n’.

8. Press ‘

✓’ to scroll through the second, third and forth sub net values. The number of dots in the upper left

indicate which part of the sub net address is being viewed.

9. Press ‘

✓’ to return to step 1.

10. Repeat steps 1 through 9 to view the settings again or press ‘

▲’ up or ‘▼’ down to select another submenu.

11. Press ‘X’ to return to normal operation.

8.1.7 Review Event Log ‘

Hi St’

1. Select the review event log ‘

Hi St’ submenu.

2. The number of logged data events available is indicated by the number of dots (0-7) shown on the left of the display.

3. Press ‘

✓’ to view the date of the last recorded event.

4. Press ‘

✓’ to display the time of the event.

5. Press ‘

✓’ again to display the relevant alarm icon and event code.

6. Repeat to view next logged event details.

7. Press ‘X’ to return to normal operation.

Note: More detailed event log information can be viewed using the web browser feature. Refer to section 14 for further details

8.2 Set-up, Calibration and Test Modes

WARNING: Set-up, calibration and test modes are intended for use by trained personnel or service engineers only. Access to these modes can be pass code protected by following the procedure in section 8.2.7.

Set-up, calibration and test modes are used to make setting changes, calibrate and test the detector. To select set-up, calibration or test mode press and hold the ‘

PASS CODE: If a pass code has been set the display will show 0000 with the first 0 flashing. Use the ‘

▲’ up

or ‘

▼’ down buttons to set the first digit of the pass code. Press ‘✓’ to enter the first digit. The second digit will then flash. Repeat the process until all four pass code digits have been entered. If an incorrect code is entered the display will show Err and return to the normal operation mode. If a pass code is forgotten contact your local Zellweger Analytics service department.

Zellweger Analytics is not responsible for any costs associated with the recovery of the passcode in the event that the user has forgotten or cannot access their unique passcode. It is strongly advised that the user records all pass codes with the instrument serial number in a secure and separate location to the MIDAS

unit. Delays in

recovering the lost passcodes may be experienced and are not the responsibility of Zellweger Analytics.

NOTE: Should the passcode be activated, the unit will continue to detect gas and indicate maintenance and instrument faults.

After successfully entering the pass code (if set) the first menu ‘ SET’ set-up icon will show on the display. The ‘

CAL’ calibration or ‘ tESt’ test menu can also be selected using the ‘▲’ up or ‘▼’ down buttons. Press the ‘✓’

accept button to enter the selected menu or the ‘X’ cancel button to return to normal operation mode.

8.2.1 Set-up Menu ‘ SEt’

The set-up menu allows the settings of the detector to be changed. The set-up menu consists of 6 submenus as shown in the table below.

Table 12. Set-up mode submenus.

Set-up submenu

Icon Changeable settings

Alarms

Gas ID, Alarm 1 and alarm 2 configuration, set points, time delay, latching/non latching, energized/de-energized

Faults

Configuration, Latching/non latching, energized/de-energized

Calibration

Calibration interval (days)

Time/Date

timE Date format mm:dd or dd:mm, current year, month, day, hours, minutes

IP address

Auto address selection on/off, IP address, sub net mask values.

Pass code

Set pass code

NOTE: All settings in a submenu are accepted when the ‘✓’ accept button is pressed after the last submenu setting. This saves the changes and is indicated by displaying ‘UPdt’ on the LCD. If however the ‘X’ cancel button is pressed at any time before the changes are accepted, this will cause any changes to be cancelled in that particular submenu.

To select the set-up menu from normal operation, press the ‘

▲’ up button for a few seconds. Enter the pass code

(if set). Use the ‘

▲’ up or ‘▼’ down buttons to select the set-up menu ‘ ’ icon and press the ‘✓’ accept button.

8.2.2 Set Alarms ‘

ALm’

1. Use the ‘

▲’ up or ‘▼’ down buttons to select the set alarms ‘ ALm’ submenu and press ‘✓’ to accept.

2. The flashing gas id code is displayed along with the gas cylinder and alarms icon ‘

’.

3. Use the ‘

▲’ up or ‘▼’ down buttons to change the gas ID number (only applicable on multi gas sensor

cartridges- see table below).

4. Press ‘✓’ to accept.

5. The flashing level 1 (L1) alarm type is displayed (U) rising or (d) falling.

6. Use the ‘▲’ up or ‘▼’ down buttons to change the alarm type.

7. The flashing alarm 1 value is displayed along with the icon ‘

▲’.

8. Use the ‘

▲’ up or ‘▼’ down buttons to change the value.

9. Press ‘✓’ to accept.

10. The flashing level 2 (L2) alarm type is displayed (U) rising or (d) falling.

11. Use the ‘▲’ up or ‘▼’ down buttons to change the alarm type.

12. Press ‘✓’ to display the flashing alarm 2 value along with the icon ‘ ’.

13. Use the ‘▲’ up or ‘▼’ down buttons to change the A2 value.

14. Press ‘

✓’ to display the flashing alarm on time delay (seconds).

15. Use the ‘▲’ up or ‘▼’ down buttons to change the alarm on time delay (seconds).

16. Press ‘

✓’ to display the flashing alarm relay latching (L) or non latching (nL) setting.

17. Use the ‘

▲’ up or ‘▼’ down buttons to change between the settings.

18. Press ‘

✓’ to display the flashing alarm relays normally energized (nE) or normally de-energized (nd) setting.

19. Use the ‘

▲’ up or ‘▼’ down buttons to change between the settings.

20. Press ‘

✓’ to update all the changes (UPdt displayed) and return to step 1.

21. Press ‘

▲’ up or ‘▼’ down to select another submenu.

22. Press ‘X’ to return to set-up, calibration and test menu selection.

23. Press ‘X’ again to return to normal operation.

Note: When replacing a single gas sensor cartridges with the same type single gas sensor cartridge, no change of gas confirmation is required. When changing a multi gas sensor cartridge with the same type multi gas sensor cartridge, the new sensor cartridge will assume the same previously set gas ID and will not request a change gas confirmation.

Table 13. Set-up mode submenus.

Sensor cartridge Part No.

MIDAS-S-NH3

MIDAS-S-ASH

MIDAS-S-HYD

MIDAS-S-PH3

MIDAS-S-SHX

MIDAS-S-SHL

MIDAS-S-HSE

MIDAS-S-HFX

MIDAS-S-SF4

MIDAS-S-HCL

Gas Name Range Sensor

cartridge ID

Ammonia 0-100 ppm 01 Not applicable

Arsine 0-0.2 ppm 02 Not applicable

Diborane 0-0.4 ppm 03 1

Germane 0-0.8 ppm 03 2

Phosphine 0-1.2 ppm 04 Not applicable

Silane(20) 0-20 ppm 05 1

Disilane 0-20 ppm 05 2

Silane(2) 0-2 ppm 06 Not applicable

Hydrogen Selenide

Hydrogen Fluoride

Boron Trifluoride

Nitrogen Trifluoride

Tungsten Hexafluoride

Sulfur Tetrafluoride

Chlorine Trifluoride

Hydrogen Chloride

Boron Trichloride

Dichlorosilane 0-8 ppm 10 3

Hydrogen Bromide

0-0.4 ppm 07 Not applicable

0-12 ppm

0-8 ppm 08 2

0-40 ppm 08 3

0-12 ppm

0-0.8 ppm 09 1

0-0.8 ppm 09 2

0-8 ppm

0-8 ppm 10 2

0-8 ppm

08 1

08 4

10 1

10 4

Gas ID

MIDAS-S-POC

MIDAS

detectors are not ETL approved for monitoring in or sampling from classified areas above 25% LEL

MIDAS-S-HAL

MIDAS-S-BR2

MIDAS-S-CO2

MIDAS-S-COX

MIDAS-S-H2X

MIDAS-S-HCN

MIDAS-S-H2S

MIDAS-S-NOX

MIDAS-S-NO2

MIDAS-S-O2X

MIDAS-S-O3X

MIDAS-S-SO2

MIDAS-S-TEO

MIDAS-S-LEL

Phosphorous

0-0.8 ppm 11 Not applicable

Oxychloride

Chlorine 0-2 ppm 12 1

Fluorine 0-4 ppm 12 2

Bromine 0-0.4 ppm 13 1

Chlorine

0-0.4 ppm 13 2

Dioxide

Carbon

0-2% Vol 14 Not applicable

Dioxide

Carbon

0-100ppm 15 Not applicable

Monoxide

Hydrogen 0-1000 ppm 16 Not applicable

Hydrogen

0-20 ppm 17 Not applicable

Cyanide

Hydrogen

0-40 ppm 18 Not applicable

Sulfide

Nitric Oxide 0-100 ppm 19 Not applicable

Nitrogen

0-12 ppm 20 Not applicable

Dioxide

Oxygen 0-25% Vol 21 Not applicable

Ozone 0-0.4 ppm 22 Not applicable

Sulfur Dioxide 0-8 ppm

23 Not applicable

TEOS 0-40 ppm 24 Not applicable

Hydrogen 0-100% LEL

Methane 0-100% LEL

25 1

25 2

8.2.3 Set Faults ‘ FLt’

The set-up menu allows the settings of the detector to be changed. The set-up menu consists of 6 submenus as shown in the table below.

1. Use the ‘▲’ up or ‘▼’ down buttons to select the set faults ‘ FLt’ submenu and press ‘✓’ to accept.

2. The flashing fault relay configuration (1FLt, 2 FLt or CmbF) is displayed.

3. Use the ‘

▲’ up or ‘▼’ down buttons to change the configuration.

(See the table below for details of fault relay configurations)

4. Press ‘✓’ to display the flashing fault relay latching (L) or non latching (nL) setting is displayed.

5. Use the ‘

▲’ up or ‘▼’ down buttons to change between the settings.

6. Press ‘

✓’ to display the flashing fault relay normally energized (nE) or normally de-energized (nd) setting.

7. Use the ‘

▲’ up or ‘▼’ down buttons to change between the settings.

8. Press ‘

✓’ to update all the changes (UPdt displayed) and return to step 1.

9. Press ‘

▲’ up or ‘▼’ down to select another submenu.

10. Press ‘X’ to return to set-up, calibration and test menu selection.

11. Press ‘X’ again to return to normal operation.

Table 14. Fault relay configuration options.

Fault Relay Configuration Relay 1 Relay 2 Relay 3

Instrument Fault Only (1FLt) Alarm 1 Alarm 2 Instrument Fault

Separate Fault Relays (2FLt) Any Alarm Maintenance Fault Instrument Fault

Combined Fault Relay (CmbF) Alarm 1 Alarm 2 Any Fault

8.2.4 Set Calibration Interval ‘ CAL’

1. Select the set calibration interval ‘

CAL’ submenu and press ‘✓’ to accept.

2. The flashing display shows the number of days interval after a calibration that a calibration due maintenance fault will be displayed.

3. Use the ‘

▲’ up or ‘▼’ down buttons to change the number of days. (If the calibration interval is set below

‘001’ then ‘OFF’ will be displayed and no calibration interval will be activated and no reminders displayed)

4. Press ‘

✓’ to update the change (UPdt displayed) and return to step 1.

5. Press ‘

▲’ up or ‘▼’ down to select another submenu.

6. Press ‘X’ to return to set-up, calibration and test menu selection.

7. Press ‘X’ again to return to normal operation

8.2.5 Set Date and Time ‘timE’

1. Select the set date and time ‘timE’ submenu and press ‘

✓’ to accept.

2. The flashing display will show the current date format mm:dd or dd:mm.

3. Use the ‘

▲’ up or ‘▼’ down buttons to change the date format.

4. Press ‘

✓’ to display the flashing current year setting.

5. Use the ‘

▲’ up or ‘▼’ down buttons to change the year setting (between 2003 and 2030).

6. Press ‘

✓’ to display the flashing current month setting.

7. Use the ‘

▲’ up or ‘▼’ down buttons to change the month setting (between 1 and 12)

8. Press ‘

✓’ to display the flashing current day setting.

9. Use the ‘

▲’ up or ‘▼’ down buttons to change the day setting (between 1 and 31)

10. Press ‘

✓’ to display the flashing hours of current time.

11. Use the ‘

▲’ up or ‘▼’ down buttons to change the hours setting (between 00 and 23).

12. Press ‘

✓’ to display the flashing minutes of current time.

13. Use the ‘

▲’ up or ‘▼’ down buttons to change the minutes setting (between 00 and 59).

14. Press ‘

✓’ to update the changes (UPdt displayed) and return to step 1.

15. Press ‘

▲’ up or ‘▼’ down to select another submenu.

16. Press ‘X’ to return to set-up, calibration and test menu selection.

17. Press ‘X’ again to return to normal operation.

8.2.6 Set Address ‘ nET’

1. Select the set address ‘

nEt’ submenu and press ‘✓’ to accept.

2. A flashing ‘n’ or ‘Y’ is displayed depending on if auto address detection is on (AU Y) or off (AU n).

3. If automatic address detection (AU Y) is selected then the detector will automatically appoint a valid IP

address and return to the submenu.

4. If manual address setting (AU n) is selected press ‘

✓’ to display the flashing first part of the IP address.

The dot on the upper left indicates that the first part of the IP address is being displayed.

5. Use the ‘

▲’ up or ‘▼’ down buttons to change the address setting (between 0 and 255)

6. Press ‘

✓’ to display the second part of the address. The two dots on the upper left indicate the 2nd portion of

the address.

7. Use the ‘▲’ up or ‘▼’ down buttons to change the address setting (between 0 and 255).

8. Repeat for the third and forth parts of the IP address.

9. Press ‘✓’ to display the flashing first part of the sub net mask value.

10. Use the ‘▲’ up or ‘▼’ down buttons to change the address setting (between 0 and 255).

11. Press ‘✓’ accept and repeat for the second, third and forth sub net values. The number of dots in the upper

left indicates which part of the sub net address is being viewed.

12. Press ‘

✓’ to update the changes (UPdt displayed) and return to step 1.

13. Press ‘▲’ up or ‘▼’ down to select another submenu.

14. Press ‘X’ to return to set-up, calibration and test menu selection.

15. Press ‘X’ again to return to normal operation.

NOTE: If the IP address is changed the new settings will not be implemented until the MIDAS

unit is

powered down and back on again.

8.2.7 Set pass code ‘ PWd’

1. Select the set pass code ‘

PWd’ submenu and press ‘✓’ to accept.

2. Press ‘

▲’ up or ‘▼’ down to set the first pass code value.

(Note holding down the button will increase the increment speed).

3. Press ‘✓’ to enter the first value and move to setting the second value.

4. Press ‘

▲’ up or ‘▼’ down to set the second value.

5. Press ‘

✓’ to enter and repeat for the third and forth values in the passcode.

6. To confirm the pass code re enter it again using the same procedure.

7. The new pass code will be saved after the last entry if the two entered passcodes are the same.

NOTE: Pass codes can be set between 0001 and 9999. Setting the pass code to 0000 will switch off the pass code. If a pass code is forgotten contact your local Zellweger Analytics service department. In the event that a pass code is forgotten by the user, Zellweger Analytics is not liable for any costs associated with the recovery process nor for any inconvenience incurred while the user is unable to access protected settings. Please ensure secure records are kept for all pass codes implemented on MIDAS

units.

8.3 Calibration Menu ‘ CAL’

The calibration menu allows the calibration settings of the detector to be changed. The calibration menu comprises of 4 submenus as shown in the table below.

Table 15. Calibration mode submenus.

To select the calibration menu from normal operation, press the ‘▲’ up button for a few seconds. Enter the pass code (if set). Use the ‘

▲’ up or ‘▼’ down buttons to select the calibration menu ‘ ’ icon and press the ‘✓’ accept button.

8.3.1 Zero Calibration ‘

0CAL’

1. Use the ‘▲’ up or ‘▼’ down buttons to select the zero calibration ‘ 0CAL’ submenu and press ‘✓’ to accept.

2. The zero calibration icon starts flashing in order to tell the user to prepare to apply zero gas.

3. The inhibit ‘

’ icon is also displayed indicating that no alarm outputs will be generated during this process.

4. Press ‘✓’ to confirm when ready and the icon goes steady.

5. Apply the zero gas (or ambient air).

6. The dots on the left of the display indicate progress to a successful zero.

7. The display will show the zero gas reading and if measured to be stable for an appropriate period of time

will display ‘PASS’.

8. If the zero calibration is unsuccessful then the display will show an error code (see table oppersite)

9. Press ‘

✓’ to exit.

10. Press ‘▲’ up or ‘▼’ down to select another submenu.

11. Press ‘X’ to return to set-up, calibration and test menu selection.

12. Press ‘X’ again to return to normal operation.

Calibration submenu

Icon Calibration setting

Zero Set detector zero

Span Set detector span

Flow Calibrate detector sample flow rate

mA Calibrate detector analog output

8.3.2 Span Calibration ‘ SPAn’

1. Use the ‘

▲’ up or ‘▼’ down buttons to select the span calibration ‘ SPAn’ submenu and press ‘✓’ to accept.

2. The span calibration icon starts flashing in order to tell the user to prepare to apply span gas.

3. The inhibit ‘

’ icon is also displayed indicating that no alarm outputs will be generated during this process.

4. Use the ‘

▲’ up or ‘▼’ down buttons to select the gas ID code of calibration gas (for multi gas ID sensor

cartridges only) and press ‘¸’ to accept. (Refer to section 8.2.2 for details of gas ID codes).

5. Use the ‘

▲’ up or ‘▼’ down buttons to select if humidified ‘HUm’ or dry ‘drY’ calibration gas is being used.

6. Use the ‘

▲’ up or ‘▼’ down buttons to change the value to the concentration of span calibration gas being

used.

7. Press ‘

✓’ to confirm when ready and the icon goes steady.

8. Apply the span gas.

9. The dots on the left of the display indicate progress to a successful span.

10. The display will show the span gas reading and if measured to be stable for an appropriate period of time

will display ‘PASS’.

11. If the span calibration is unsuccessful then the display will show an error code (see below).

12. Press ‘

✓’ to exit.

13. Press ‘

▲’ up or ‘▼’ down to select another submenu.

14. Press ‘X’ to return to set-up, calibration and test menu selection.

15. Press ‘X’ again to return to normal operation

NOTE: The change in the gas bottle icon’s contents gives an indication as to the relative stability of the gas reading. The arrows and bars inside the cylinder indicate whether it is rising or falling as appropriate (see table below).

Table 16. Calibration codes

Code Code meaning

PASS Successful Calibration

FL:0H Zero Calibration Timeout - Over Range

FL:0L Zero Calibration Timeout - Under Range

FL:0U Zero Calibration Timeout - Unstable

FL:SH Span Calibration Timeout - Over Range

FL:SL Span Calibration Timeout - Under Range

FL:SU Span Calibration Timeout - Unstable

Table 17. Calibration stability icons

Stable

Over-Range

Unstable-Rising

Unstable-Flat

Unstable-Falling

Under-Range

8.3.3 Flow Calibration ‘ FLoW’

1. Use the ‘

▲’ up or ‘▼’ down buttons to select the flow calibration ‘ FLoW’ submenu and press ‘✓’ to accept.

2. The flow icon with the dot at the bottom starts flashing in order to tell the user that the unit is ready to read

the zero flow offset.

3. The inhibit ‘

’ icon is also displayed indicating that no alarm outputs will be generated during this process.

4. Press ‘

✓’ to confirm and the icon goes steady and a count down from 10 is shown as the zero flow offset

is read.

5. The display will show the flashing flow icon with the dot 1/4 ways up to tell the user to set the set point

1flow (350 cc/min).

Press ‘▲’ up or ‘▼’ down keys to adjust the reading on the external flow meter to the setpoint 1 target value.

(NOTE: The reading must be +/- 50 cc/min of target to be accepted).

7. Press ‘

✓’ to confirm and the target value flashes.

8. Press ‘

▲’ up or ‘▼’ down to enter the actual value read on the external flow meter.

(NOTE: Holding down the button will increase the increment speed).

9. Press ‘

✓’ to confirm and the icon goes steady and a count down from 10 is shown as the setpoint 1

value is read.

10. The display will show the flashing flow icon with the dot 3/4 ways up to tell the user to set the set point

2 flow (650 cc/min).

11.

Press ‘▲’ up or ‘▼’ down keys to adjust the reading on the external flow meter to the set point 2 target value.

(NOTE: The reading must be +/- 50 cc/min of target to be accepted).

12. Press ‘

✓’ to confirm and the target value flashes.

13. Press ‘

▲’ up or ‘▼’ down to enter the actual value read on the external flow meter.

(NOTE: Holding down the button will increase the increment speed).

14. Press ‘

✓’ to confirm and the icon goes steady and count down from 10 is shown as the setpoint 2 value

is read.

15. If successful the display shows UPdt (update) and the flow calibration is complete.

16. Press ‘

▲’ up or ‘▼’ down to select another submenu.

17. Press ‘X’ to return to set-up, calibration and test menu selection.

8.3.4 mA Calibration ‘mA 4-20’

1. Use the ‘

▲’ up or ‘▼’ down buttons to select the mA calibration ‘ mA4-20’ submenu and press

‘

✓’ to accept.

2. The display shows 4.00 mA indicating that the analog output should be reading 4 mA

3. The inhibit ‘ ’ icon is also displayed indicating that no alarm outputs will be generated during this process.

4. Use the ‘

▲’ up or ‘▼’ down buttons to adjust the analog output to read 4.00 mA.

5. Press ‘

✓’ to accept.

6. The display will show 20.00 indicating that the analog output should be reading 20 mA

7. Use the ‘▲’ up or ‘▼’ down buttons to adjust the analog output to read 20.00 mA.

8. Press ‘✓’ to update the changes (UPdt displayed) and return to step 1.

9. Press ‘▲’ up or ‘▼’ down to select another submenu.

10. Press ‘X’ to return to set-up, calibration and test menu selection.

11. Press ‘X’ again to return to normal operation.

8.4 Test Menu ‘ tEST’

The test menu is used to test the detector gas reading using bump test gas, and for simulation of alarm and fault display and output operation (relay, analog and digital). The test submenu also includes the detector inhibit facility. The test menu comprises of 3 submenus as shown in the table below.

Test submenu Icon Test

Bump Bump test detector with inhibited alarm outputs

Alarm/Fault

Test the alarm and fault display and output operation

Inhibit Put the unit into/out of an inhibit state and set

inhibit time out

Table 18. Test mode submenus.

To select the test menu from normal operation, press the ‘▲’ up button for a few seconds. Enter the pass code (if set). Use the ‘

▲’ up or ‘▼’ down buttons to select the test menu ‘ ’ icon and press the ‘✓’ accept button.

8.4.1 Bump Test ‘ bUmP’

1. Use the ‘

▲’ up or ‘▼’ down buttons to select the bump test ‘ bUmP’ submenu and press ‘✓’ to accept.

2. The inhibit ‘

’ icon is also displayed indicating that no alarm outputs will be generated during this process.

3. Apply the bump test gas and the display will show the measured gas concentration.

4. Remove the bump test gas and allow the detector reading to return to zero.

5. Press ‘X’ to exit.

6. Press ‘

▲’ up or ‘▼’ down to select another submenu.

7. Press ‘X’ to return to set-up, calibration and test menu selection.

8. Press ‘X’ again to return to normal operation.

8.4.2 Alarm/Fault Test ‘

Si m’

1. Use the ‘

▲’ up or ‘▼’ down buttons to select the alarm/fault test ‘ Si m’ submenu and press ‘✓’

to accept.

2. The display shows ‘Si m’ and the A1 ‘

▲’ icon.

3. Use the ‘

▲’ up or ‘▼’ down buttons to select A1 ‘▲’, A2 ‘ ’ or Fault ‘ ’ for test simulation.

4. Press ‘✓’ to select and the displays ‘SurE’ to indicate that the next step will activate the selected output

(relay, analog and digital)

5. Press ‘

✓’ and the display flashes ‘on’ indicating that the selected output is activated

6. Press ‘X’ to return to step 2 and select a different output for test.

7. Press ‘X’ to exit.

8. Press ‘

▲’ up or ‘▼’ down to select another submenu.

9. Press ‘X’ to return to set-up, calibration and test menu selection.

10. Press ‘X’ again to return to normal operation.

8.4.3 Inhibit State ‘ I nH’

1. Use the ‘

▲’ up or ‘▼’ down buttons to select the inhibit ‘ I nH’ submenu and press ‘✓’ to accept.

2. The display flashes ‘nonE’ indicating there is no inhibit currently set.

3. Use the ‘

▲’ up or ‘▼’ down buttons to select alarm, alarm and fault or all (Alm, AL-Ft or ALL) output inhibit

states. See table below for details of inhibit states.

4. Press ‘

✓’ to accept the selected inhibit state.

5. Press ‘

▲’ up or ‘▼’ down to set the inhibit timeout (between 0 minutes and 4 hrs- default 30 minutes).

6. Press ‘

✓’ to accept (UPdt displayed).

7. The selected outputs will be inhibited until the inhibit timeout has elapsed.

NOTE: If the inhibit timeout elapses before the inhibit state is set back to ‘nonE’ the maintenance fault

code M12 will be displayed.

8. To take the unit out of inhibit, select the inhibit ‘ ’ I nH submenu and press ‘✓’ to accept.

9. Use the ‘

▲’ up or ‘▼’ down buttons to select ‘nonE’

10. Press ‘

✓’ to return to the submenu selection.

11. Press ‘

▲’ up or ‘▼’ down to select another submenu.

12. Press ‘X’ to return to set-up, calibration and test menu selection.

13. Press ‘X’ again to return to normal operation.

Table 19. Inhibit states.

Inhibit state Display Function

None nonE No functions are inhibited.

Alarms Inhibited

ALm Alarm events will be detected, but alarm outputs (relays, 4-20 mA current loop

and Ethernet) will be disabled.

Alarms and Faults Inhibited

AL-Ft Alarm and fault events will be detected, but alarm and fault outputs (relays, 4-20

mA current loop and Ethernet) will be disabled.

Full Inhibit

ALL All monitoring functions inhibited. No monitoring is performed and no alarms or

faults (except for Inhibit Timeout) will be reported.

9 ROUTINE MAINTENANCE

MIDAS

is a fully serviceable product designed with modular components that can be readily replaced by trained

service personnel so as to minimize the time that the gas detector is not available.

External in-line air filters should be replaced every three months or more frequently if the system is sampling in environments that have high levels of particulate matter or very acidic / wet atmospheres. Similarly the internal particulate filter should be replaced once a year or more frequently if the sample lines are prone to heavy contamination.

Every sensor cartridge is shipped with a 12 month warranty and an extended 2 year warranty is also available for purchase. All sensor cartridges are factory calibrated to traceable national standards before shipment to the end user.

Note that testing or calibrating with the wrong (incorrect, out of date, non-traceable) calibration gases, calibration equipment, methods or operating conditions can actually damage the sensor cartridge’s lifetime and alter the calibration adversely. Only qualified calibration technicians should attempt to calibrate the MIDAS

gas

detector.

NOTE: For details regarding sensor cartridge calibration and bump testing method refer to section 18.

The internal pump module is designed to operate for a minimum of 18 - 24 months and it is recommended that this pump module (part number MIDAS-A-007) be replaced every 2 years.

9.1 Sensor Cartridge Replacement

To avoid the possibility of unwanted alarms or faults Zellweger Analytics recommend that the sensor cartridge be replaced without power to the MIDAS

unit. If fitting a sensor cartridge to a unit that is powered, please refer to

section 8.4.3 to inhibit the detectors outputs.

9.1.1 Sensor Cartridge Fitting/Replacement

1. Unscrew the thumbscrew located on the front panel and remove the cover by pulling it forwards off the main chassis (see diagram 22).

2. Ensure the power switch on the terminal module is in the off position.

3. Remove the old sensor cartridge from the unit (if fitted) by unclipping the two sensor cartridge locking tabs located either side of the sensor cartridge and using them to firmly pull the sensor cartridge out (see diagram 23).

4. Fit the new sensor cartridge by aligning the pins at the top of the sensor cartridge with the socket in the sensor cartridge chamber.

5. Carefully push the sensor cartridge into the sensor cartridge chamber until fully home and lock in place using the tabs either side of the sensor cartridge (see diagram 24).

6. Switch the power switch on the terminal module to the ‘on’ position.

7. Refit the detector’s cover by aligning the slots either side with the locating tabs on the mounting bracket assembly and pushing the cover horizontally until home. Tighten the thumbscrew located on the front panel (see diagram 25).

NOTE: If replacing a sensor cartridge with a different gas type sensor cartridge the display will scroll the message ‘CHANGE GAS?’ If you are changing the sensor cartridge gas type press ‘

✓’ to accept. If not, fit the correct sensor cartridge. The pass code (if set) must be entered to change sensor cartridge gas type. To set the correct gas for a multi gas type sensor cartridge refer to section 8.2.2.

Diagram 22. Removing detector cover Diagram 23. Removing sensor cartridge

Diagram 24. Fitting/replacing sensor cartridge Diagram 25. Refitting detector cover

REMOVING COVER

mounting

bracket

chassis

cover

loosen

idas

G a

s Se

s o

r C

rt r

i d

g e

N IT

R OG

I F LU

I D

F 3

: M

I D

-S

: 02

4 4

s e

b y

ll w

i c s

chassis

sensor

idas

a s

n s

o r

C a

r i d

N IT

R OG

E N

I F LU

I D

S-S-

: 02

4 56

: 07

006

e g

t i c

HOW CARTRIDGE IS FITTED

chassis

cartridge

i d

a s

so r

r i d

g e

NITROG

E N

R I F

I DE

D A

S-

-H FX

3 44

U se

-20

l w

l y t

i cs

slots

tighten

HOW COVER IS FITTED

tabs

cartridge fitted

9.2 PUMP REPLACEMENT

The pump module has been designed to allow easy replacement. New pump modules are supplied with new springs, bracket and tubing pre-assembled for quick release / replacement

Diagram 26. Location of pump module

The following procedure should be followed carefully and only performed by suitably trained personnel.

1. Isolate the power to the detector.

2. Unscrew the thumbscrew located on the front panel.

3. Remove the cover by pulling it forward off the main chassis.

4. Unscrew the two retaining screws located at the bottom front of the chassis.

5. Pull the main chassis forward to disconnect it from the mounting bracket assembly.

Pump module

6. Remove the 4 pump module screws.

7. Remove the two fixing clips and disconnect the tubes at the manifold.

8. Slide the pump module out and disconnect the connector from the pcb.

9. Fit the new pump module following the steps above in reverse order.

9.3 Re Assembling the Detector

1. Align the PCB at the top rear of the main chassis with the connector located at the top of the mounting bracket assembly.

2. At the same time align the two tubes at the bottom rear of the main chassis with the two tubes located on the bottom of the mounting bracket assembly.

3. Slide the chassis backwards on the mounting bracket assembly so that the PCB, connector and tubes engage simultaneously.

4. Ensure the PCB, connector and tubes are fully engaged by firmly pushing the main chassis horizontally backwards on the mounting bracket assembly (WARNING: DO NOT PUSH ON THE LCD AS THIS MAY CAUSE DAMAGE).

5. Align the two fixing screws located at the bottom of the chassis with the screw threads on the mounting bracket assembly.

6. Tighten the screws to secure the chassis to the mounting bracket assembly.

7. Switch the power switch on the terminal module to the ‘on’ position.

8. Refit the detector’s cover by aligning the slots either side with the locating tabs on the mounting bracket assembly.

9. Push the cover horizontally until home.

10. Tighten the thumbscrew located on the front panel.

9.4 Filter Replacement

The internal filter has been designed for easy replacement.

The following procedure should be followed carefully and only performed by suitably trained personnel.

1. Isolate the power to the detector.

2. Unscrew the thumbscrew located on the front panel.

3. Remove the cover by pulling it forwards off the main chassis.

4. Unscrew the two retaining screws located at the bottom front of the chassis.

5. Pull the main chassis forward to disconnect it from the mounting bracket assembly.

6. Locate the filter access slot in the side of the main chassis.

Main chassis

Filter

Filter access slot

Diagram 30. Filter location

7. Carefully disconnect both sides of the filter from the pump manifold.

8. Remove the old filter and replace with a new filter ensuring that the filter connectors are fully engaged in the manifold ports and that the filter is the correct way round (arrow pointing downwards).

Diagram 31. Filter orientation

Filter connector

Manifold ports

New filter correct orientation

10 PYROLYZER MODULE OPTION

The pyrolyzer module option is installed underneath the standard MIDAS through the pyrolyzer to the sensor cartridge. The pyrolyzer converts Nitrogen Trifluoride (NF sample into Hydrogen Fluoride (HF) by means of pyrolysis. The HF can then measured by the sensor cartridge and the concentration displayed as the equivalent reading in ppm NF availability of other detectable gases using the pyrolyzer module.

gas detector. The air sample is drawn

. Contact Zellweger Analytics for the

) present in the air

Diagram 32. Pyrolyzer module attached to MIDAS

gas detector

MIDAS

gas detector

Pyrolyzer module (MIDAS-T-00P)

WARNING: To maintain stated sensor performance when using the pyrolyzer, ensure the constant ambient temperature and humidity levels of the installation point do not exceed the maximum operating temperature and humidity range. This product can tolerate temporary changes in temperature and humidity, but constant exposure to higher levels of temperature and humidity will require more frequent bump testing or calibration to confirm working specification.

10.1 Fitting the Pyrolyzer Module

1. Isolate the power to the detector.

2. Unscrew the captive thumbscrew located on the front panel.

3. Remove the cover by pulling it forwards off the main chassis.

4. Unscrew the two captive screws located at the bottom front of the chassis.

5. Pull the main chassis forwards to disconnect it from the mounting bracket assembly.

6. Thread the connector and ribbon cable from the pyrolyzer through the rectangular access in the bottom of the mounting bracket.

7. Plug the connector into the socket (con5) at the bottom left of the terminal board.

Diagram 33. Connecting the Pyrolyzer module

8. Offer the pyrolyzer module up underneath the mounting bracket ensuring that the fitting at the top rear of the pyrolyzer mates with the sample inlet port at the bottom of the mounting bracket.

9. Align the three screw mounting bosses on the top of the pyrolyzer with the three screw holes in the mounting bracket.

10. Insert and tighten the three screws provided.

Rectangular access at bottom of bracket

Mounting screws (x3)

Socket

Connector

Pyrolyzer module

Power switch

Thermal module

Gas sample inlet as NF

MIDAS sample

inlet as HF

Pyrolyzer Option

super-heater

Gas sample

chamber

Needle valve (Heater flow adjustment

)

Diagram 34. Pyrolyzer main components

10.2 Re-Assembling the MIDAS® Detector

1. Align the PCB at the top rear of the main chassis with the connector located at the top of the mounting bracket assembly.

2. At the same time align the two tubes at the bottom rear of the main chassis with the two tubes located on the bottom of the mounting bracket assembly.

3. Slide the chassis backwards on the mounting bracket assembly so that the PCB and connector and tubes engage simultaneously.

5. Align the two fixing screws located at the bottom of the chassis with the screw threads on the mounting bracket assembly.

6. Tighten the screws to secure the chassis to the mounting bracket assembly.

7. Fit sensor cartridge MIDAS-S-HFX into the sensor cartridge chamber.

8. Switch the power switch on the terminal module to the ‘on’ position.

Refit the detector’s cover by aligning the slots either side with the locating tabs on the mounting bracket assembly.

10. Push the cover horizontally until home.

11. Tighten the thumbscrew located on the front panel.

12. After applying power ensure that the sensor cartridge gas id code 08-03 is set. Refer to section 8.2.2 for details of how to set the gas id code.

The MIDAS

gas detector automatically detects the connection of the pyrolyzer module and provides all the power

and signaling for the device.

Diagram 35. Pyrolyzer detail

Gas sample inlet as NF3

Exhaust Tubing

MIDAS sample

inlet as HF

Jumper Teflon tubing

between pyrolyzer and

MIDAS (included with

pyrolyzer option)

Mounting holes

for M3 screws (3)

Terminal for Power and communication

connection

Pyrolyzer Option

Freon filter

Diagram 36 shows in a simple form how the gas sample is drawn through the pyrolyzer module by the pump (located at the end of the gas path) and is first routed to the pyrolyzer via the freon filter before being resent to the gas sensor cartridge, where the gas measurement is taken. The sample continues via the flow-meter through the dust filter and is finally exhausted from the instrument. Adjustment of the gas flow through the instrument is done automatically. To perform a flow calibration refer to section 8.3.3.

Diagram 36. Pyrolyzer configuration gas flow

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Diagram 37 shows in diagrammatic form how the gas sample flows through the various components. It shows how the instrument controls, monitors and measures the gas sample flow and signals any fault conditions to the user via the LCD screen, e.g. due to flow problems caused by pump failure, or failure of the pyrolyzer unit, etc.

Diagram 37. Pyrolyzer option flow diagram

Pyrolyzer Gas Sensor

Sample Inlet 500 ml/min

Pyrolyzer Flow rate

50 ml/min

Voltage/

Current

Sensin

Driver

Heater

Heater Controller

Pyrolyzer Option

heater voltage/current sensing system to detec

Heater Controller utilizes

element failure and out of

conditions such as heater

temperature range.

Bypass flow

Flow Controller

Pump Drive

Pressure Sensin

Pyro Fault Flow Fault

Sensor

Pressure

Pump

Exhaus

Sample

Flow Controller utilizes differential pressure over laminar flow element to monitor flow conditions

Elemen

Laminar Flow

Gas Sample Flow

Signal/Control Flow

Dust Filter

Particulat

Freon/

lter

MIDA

S Transmitter

Main

Control PC

450 ml/min

11 ANALOG INPUT MODULE

MIDAS

can be fitted with an analog module (MIDAS-T-00A) that allows it to be used as a control ‘hub’ for other remotely connected 4-22 mA analog detection devices such as other gas detectors, flow sensor cartridges and other industrial monitoring apparatus.

NOTE: Not all analog devices will be compatible with the MIDAS

Analog Input module. Zellweger Analytics

is not responsible for ensuring the compatibility of the MIDAS

transmitter and analog input module with other manufacturers’ analog output devices. Please contact your local Zellweger Analytics representative prior to ordering this option.

Diagram 38. Analog module configuration

Any MIDAS® detector can be fitted with the optional analog input module that accepts the analog signal from a remote device. MIDAS

can then be configured to display the remote system’s analog reading on the local LCD,

trigger relays and provide a digital output via Modbus/TCP Ethernet.

For full installation and wiring instructions please refer to the separate MIDAS

Analog Input module Quick Start

Guide (MIDAS-A-023) available on request from Zellweger Analytics.

11.1 Fitting the Analog Module

1. Isolate the power to the detector.

2. Unscrew the thumbscrew located on the front panel.

3. Remove the cover by pulling it forwards off the main chassis.

4. Unscrew the two retaining screws located at the bottom front of the chassis.

5. Pull the main chassis forwards to disconnect it from the mounting bracket assembly.

6. Thread the connector and ribbon cable from the analog module through the rectangular access in the bottom of the mounting bracket.

7. Plug the connector into the socket (con5) at the bottom left of the terminal board.

8. Offer the analog module up underneath the mounting bracket ensuring that the three screw mounting bosses on the top of the module align with the three screw holes in the mounting bracket.

9. Insert and tighten the three screws provided.

Diagram 39. Analog module connection.

Rectangular access at bottom of bracket

Mounting screws (x3)

Socket

Connector

Analog module

11.2 RE-ASSEMBLING THE MIDAS

DETECTOR

1. Align the PCB at the top rear of the main chassis with the connector located at the top of the mounting bracket assembly.

2. At the same time align the two tubes at the bottom rear of the main chassis with the two tubes located on the bottom of the mounting bracket assembly.

3. Slide the chassis backwards on the mounting bracket assembly so that the PCB, connector and tubes engage simultaneously.

4. Ensure the PCB connector and tubes are fully engaged by firmly pushing the main chassis horizontally backwards on the mounting bracket assembly (WARNING: DO NOT PUSH ON THE LCD AS THIS MAY CAUSE DAMAGE).

5. Align the two fixing screws located at the bottom of the chassis with the screw threads on the mounting bracket assembly.

6. Tighten the screws to secure the chassis to the mounting bracket assembly.

7. Fit the dummy sensor (optional accessory MIDAS-A-013) as per Section 9.1.1

8. Switch the power switch on the terminal module to the ‘on’ position

9. Refit the Detector’s cover by aligning the slots either side with the locating tabs on the mounting bracket assembly.

10. Push the cover horizontally until home.

11. Tighten the thumbscrew located on the front panel.

12 TROUBLE SHOOTING AND FAULT DIAGNOSIS

General trouble shooting guide and specific fault code table.

Table 20. Fault code descriptions

Fault code Description Condition Recovery

m10

Over range. A large concentration has

been detected. The MIDAS

requires an independent confirmation that the gas hazard is gone.

Supply known clean air to the MIDAS

and clear this fault.

m11

Calibration expires soon.

The user specified calibration interval has elapsed.

Perform zero and span calibrations. Increase span calibration period.

m12

Cartridge expires soon.

Cartridge is old and will expire soon.

Replace the cartridge with a new cartridge.

m13

Flow low.

MIDAS

is no longer able to regulate flow.

Check filters and pump.

m14

Interferent present.

An interferent is degrading the ability of

the MIDAS

to detect gas.

Check application.

m15

Temperature near limit.

Temperature within 2 Celsius of limit.

Check installation environment.

m16

BaseLine fault. Sensor baseline has

drifted.

Check for background gas concentration, temperature or humidity fluctuations. Perform zero calibration. Replace cartridge.

m17

Inhibit timeout. Transmitter has been in

inhibit mode too long.

Resume monitoring or increase timeout value.

F40

Sensor overdosed. Sensor has been exposed

to high gas concentrations for long periods.

Replace cartridge.

F41

BaseLine fault. Sensor baseline has

drifted.

Check for background gas concentration, temperature or humidity fluctuations. Perform zero calibration. Replace cartridge.

F42

Calibration expired.

Too long since last calibration.

Replace or calibrate the cartridge.

F43

Cartridge expired. Cartridge is too old. Replace cartridge.

F44

Cell failure. Cartridge has failed

Reflex™ check.

Replace cartridge.

F45

Stabilization timeout.

Cartridge has failed to stabilize.

If temperature or humidity shocks exist, precondition the cartridge. Check for background gas concentration. Replace cartridge.

F46

Cartridge analog failure.

Various reasons. Replace cartridge.

F47

Cartridge memory invalid.

Checksum error. Replace cartridge.

F48

Cartridge absent. No communications. Reseat cartridge. Replace cartridge.

F49

Cartridge wrong type.

Cartridge type found to be incorrect after boot-up.

Replace cartridge.

F80

Temperature limits Exceeded.

Temperature is outside limits

Check installation environment.

F81

Flow fail. Flow < 70% of nominal

for 15 seconds.

Check filters. Check for kinked tubing, Replace pump.

F82

Excessive electrical noise.

Internal electronics repeatedly noisy.

Check grounding of MIDAS

chassis. Check termination of cable shields.

Relo

cate the MIDAS® further from noise sources. Add ferrite inductors to cables.

F83

Pyrolyzer fail. Pyrolyzer fails to heat. Check electrical connection to pyrolyzer. Replace heater. Replace pyrolyzer.

F84

Misc. transmitter fault.

Transmitter is defective.

Service or replace MIDAS

13 REFLEX®

MIDAS

uses patented Zellweger Analytics technology to continuously monitor the health check status of specific electrochemical cells and alert the user if a cell enters a variety of fault conditions (such as open or short circuit etc.) which would leave the cell unable to detect gas and raise an appropriate alarm signal.

REFLEX® overcomes this unseen failure mode by applying periodically a special electronic pulse to the cell and reviewing the ‘echo’ from the cell as it responds to the applied signal. If the cell is deteriorating within certain pre-set limits based on the received signals then MIDAS

will decrease the REFLEX® sampling interval in order

to establish the actual viability of the cell. Within a relatively short time, MIDAS

will be able to alert the user via fault codes that the electrochemical cell is likely to be requiring replacement and is possibly unable to correctly detect gas.

REFLEX® is not required for pellistors or oxygen electrochemical cells as these sensor cartridges provide alternative electronic means to indicate open circuits and other sensor cartridge damage issues.

14 INTERNAL WEB SERVER

The MIDAS

gas detector unit utilizes an Ethernet port with the TCP/IP protocol as standard. The MIDAS® can function as a HTML web page server and these web pages can be viewed on external computer equipment (PC, PocketPC etc.). These web pages replicate the user interface on the front panel of the MIDAS

in a more flexible and friendly format for diagnostic and data entry purposes. The web pages also contain additional features not available via the keypad.

This procedure explains how to view web pages for a single MIDAS

which is connected to a single PC only.

In this example the MIDAS

is separately powered by 24 VDC. Of course it is possible to connect hundreds of

MIDAS

units to an Ethernet network which is part of the end user’s process LAN and more information may be

required from the local IT department and Zellweger Analytics as appropriate.

14.1 Physical Network Components

The Ethernet 100BaseT physical network is intended to connect computers to other computers through hubs. For this reason, a MIDAS

cannot communicate directly with a PC using a standard cable. This problem can be overcome by using a special “cross-over” Ethernet cable or by using a ‘hub’ or ‘switch’ and two standard (straight through wire connections) Ethernet cables. An example of a cross-over cable is the Belkin A3X126 family. An example of an Ethernet switch is the Linksys SD205. These or similar parts are commonly available from local IT equipment suppliers.

14.2 Internet Settings

Communications requires knowledge of the IP address and netmask of both the MIDAS® and the PC. Unless the MIDAS® is connected to a large network with a DHCP server, the addresses must be set manually. To view or set the IP address of the MIDAS

, see section 8.2.6. The procedure for setting the IP address of a PC is

detailed in the following example using a PC loaded with Microsoft™ Windows XP and Internet Explorer version

5.0 or higher as illustrated by Diagram 40. In the usual case the netmask for both computers should be set to

255.255.255.0. The most-significant three bytes of the IP address must be identical and the least-significant byte must be unique. For example, if the IP address of the MIDAS

was set to 169.254.60.1 then an appropriate IP

address for the PC would be 169.254.60.42.

14.3 Running the Web Browser

Start Microsoft™ Internet Explorer or similar web browser. Set the URL to “http://xxx.xxx.xxx.xxx” where the “xxx” fields are replaced with the IP address of the MIDAS

. A screen similar to Diagram 41. should be displayed. The

status and configuration of the MIDAS

can be viewed and set by clicking on the appropriate links.

Diagram 40 - IP Address setting in Windows XP

Diagram 41 - Sample MIDAS

web page

15 TYPICAL INSTALLATION TOPOLOGIES

MIDAS

has very flexible installation options to allow the user to select the one most suitable for their specific

application.

15.1 Conventional Installation

15.2 Modbus/TCP Installation

15.3 Power over Ethernet (POE) Installation

16 ORDERING INFORMATION

This section contains details of how to order complete MIDAS

detector and sensor cartridge kits, separate

transmitters and sensor cartridges as well as spares and accessories.

16.1 MIDAS

Transmitter

Description Part no.

MIDAS

transmitter. Complete with manual and quick start guide. (1) PG16 gland fitting for power in and relays out, 1/4” O.D. x 1/8” I.D. sample inlet tubing (10’) [3m], 3/16” I.D. exhaust tubing (10’) [3m], and a sample line tubing duct adapter. Order a sensor cartridge separately for each transmitter.

MIDAS-T-001

16.2 MIDAS® Pyrolyzer

Description Part no.

MIDAS

Pyrolyzer Module. Pyrolyzer MIDAS® transmitters provide detection of NF3 specifically. Unit includes a snap on pyrolyzer module that operates with and universal MIDAS

Extractive Transmitter (order separately) and (1) Freon in line filter. Units are powered via direct connection to transmitter unit. Consult ZA for additional gases that may become available via pyrolysis. Pyrolyzer includes Pyrolyzer Quick Start Guide and installation screws. Order the NF

cartridge (MIDAS-S-HFX)

separately.

MIDAS-T-00P

16.3 MIDAS® Analog INPUT Module

Description Part no.

MIDAS

Analog Input Module. For use with the MIDAS® gas detector for connection of external 4-20 mA inputs from other 4-20 mA analog transmitter devices to be displayed on the local MIDAS

display; activation of the 3 on board relays and transmission of the signal output via 0-22 mA and TCP Modbus Ethernet output. In this configuration the transmitter cannot be configured to measure gas directly with a separate MIDAS

cartridge, which should not be installed.

MIDAS-T-00A

16.4 MIDAS® Plug in Sensor Cartridges (Standard Warranty)

The plug in sensor cartridges for the MIDAS

Gas Transmitter are sold separately with a 1 year (12 month) standard warranty. For extended warranty sensor cartridges see the section 16.5. Some sensor cartridges can be configured to detect more than 1 target gas. Details of the gases, ranges and part numbers for the standard warranty sensor cartridges available are listed below.

Description Range Part no.

Ammonia 0-100 ppm MIDAS-S-NH3

Arsine 0-0.2 ppm MIDAS-S-ASH

Boron Trichloride 0-8 ppm MIDAS-S-HCL

Boron Trifluoride 0-8 ppm MIDAS-S-HFX

Bromine 0-0.4 ppm MIDAS-S-BR2

Chlorine 0-2 ppm MIDAS-S-HAL

Chlorine Dioxide 0-0.4 ppm MIDAS-S-BR2

Chlorine Trifluoride 0-0.8 ppm MIDAS-S-SF4

Carbon Dioxide 0-2.0% vol MIDAS-S-CO2

Carbon Monoxide 0-100 ppm MIDAS-S-COX

Diborane 0-0.4 ppm MIDAS-S-HYD

Dichlorosilane 0-8 ppm MIDAS-S-HCL

Disilane 0-20 ppm MIDAS-S-SHX

Fluorine 0-4 ppm MIDAS-S-HAL

Germane 0-0.8 ppm MIDAS-S-HYD

Hydrogen* 0-1000 ppm MIDAS-S-H2X

Hydrogen 0-100% LEL

Hydrogen Bromide 0-8 ppm MIDAS-S-HCL

Hydrogen Chloride 0-8 ppm MIDAS-S-HCL

Hydrogen Cyanide 0-20 ppm MIDAS-S-HCN

Hydrogen Fluoride 0-12 ppm MIDAS-S -HFX

Hydrogen Selenide 0-0.4 ppm MIDAS-S-HSE

Hydrogen Sulfide 0-40 ppm MIDAS-S-H2S

Methane 0-100% LEL

Nitric Oxide 0-100 ppm MIDAS-S-NOX

Nitrogen Dioxide 0-12 ppm MIDAS-S-NO2

Nitrogen Trifluoride 0-40 ppm MIDAS-S-HFX

Oxygen 0-25% v/v MIDAS-S-O2X

Ozone 0-0.4 ppm MIDAS-S-O3X

Phosphine 0-1.2 ppm MIDAS-S-PH3

Phosphorous Oxychloride 0-0.8 ppm MIDAS-S-POC

Silane 0-20 ppm MIDAS-S-SHX

Silane low level 0-2 ppm MIDAS-S-SHL

Sulfur Dioxide 0-8 ppm MIDAS-S-SO2

Sulfur Tetrafluoride 0-0.8 ppm MIDAS-S-SF4

TEOS Tetraethyl Orthosilicate 0-40 ppm MIDAS-S-TEO

Tungsten Hexafluoride 0-12 ppm MIDAS-S-HFX

MIDAS-S-LEL

MIDAS® detectors are not ETL approved for monitoring in or sampling from classified areas above 25% LEL

16.5 MIDAS® Plug in Sensor Cartridges (Extended Warranty)

The plug in sensor cartridges for the MIDAS

Gas Transmitter are available with an extended 2 year (24 month) warranty. Some sensor cartridges can be configured to detect more than 1 target gas. Details of the gases, ranges and part numbers for the extended warranty sensor cartridges available are listed below.

Description Range Part no.

Ammonia 0-100 ppm MIDAS-E-NH3

Arsine 0-0.2 ppm MIDAS-E-ASH

Boron Trichloride 0-8 ppm MIDAS-E-HCL

Boron Trifluoride 0-8 ppm MIDAS-E-HFX

Bromine 0-0.4 ppm MIDAS-E-BR2

Chlorine 0-2 ppm MIDAS-E-HAL

Chlorine Dioxide 0-0.4 ppm MIDAS-E-BR2

Chlorine Trifluoride 0-0.8 ppm MIDAS-E-SF4

Carbon Dioxide 0-2.0% vol MIDAS-E-CO2

Carbon Monoxide 0-100 ppm MIDAS-E-COX

Diborane 0-0.4 ppm MIDAS-E-HYD

Dichlorosilane 0-8 ppm MIDAS-E-HCL

Disilane 0-20 ppm MIDAS-E-SHX

Fluorine 0-4 ppm MIDAS-E-HAL

Germane 0-0.8 ppm MIDAS-E-HYD

Hydrogen 0-1000 ppm MIDAS-E-H2X

Hydrogen 0-100% LEL

Hydrogen Bromide 0-8 ppm MIDAS-E-HCL

Hydrogen Chloride 0-8 ppm MIDAS-E-HCL

Hydrogen Cyanide 0-20 ppm MIDAS-E-HCN

Hydrogen Fluoride 0-12 ppm MIDAS-E-HFX

Hydrogen Selenide 0-0.4 ppm MIDAS-E-HSE

Hydrogen Sulfide 0-40 ppm MIDAS-E-H2S

Methane 0-100% LEL

Nitric Oxide 0-100 ppm MIDAS-E-NOX

Nitrogen Dioxide 0-12 ppm MIDAS-E-NO2

Nitrogen Trifluoride 0-40 ppm MIDAS-E-HFX

Oxygen 0-25% v/v MIDAS-E-O2X

Ozone 0-0.4 ppm MIDAS-E-O3X

Phosphine 0-1.2 ppm MIDAS-E-PH3

Phosphorous Oxychloride 0-0.8 ppm MIDAS-E-POC

Silane 0-20 ppm MIDAS-E-SHX

Silane low level 0-2 ppm MIDAS-E-SHL

Sulfur Dioxide 0-8 ppm MIDAS-E-SO2

Sulfur Tetrafluoride 0-0.8 ppm MIDAS-E-SF4

TEOS Tetraethyl Orthosilicate 0-40 ppm MIDAS-E-TEO

Tungsten Hexafluoride 0-12 ppm MIDAS-E-HFX

MIDAS-E-LEL

MIDAS® detectors are not ETL approved for monitoring in or sampling from classified areas above 25% LEL

16.6 MIDAS® Complete Gas Detector Kits

A complete kit including a universal MIDAS

transmitter (MIDAS-T-001) and a selected MIDAS® sensor cartridge can be ordered as a combined package. Each sensor cartridge is supplied with an extended 2 year warranty. Sensor cartridge and gas detector are packaged separately for ease of installation. Note that to detect NF

separate pyrolyzer module (MIDAS-T-00P) must also be ordered.

Complete detector kit and sensor cartridge description Kit part no.

Ammonia 0-100 ppm kit MIDAS-K-NH3

Arsine 0-0.2 ppm kit MIDAS-K-ASH

Boron Trichloride 0-8 ppm, Dichlorosilane 0-8 ppm, Hydrogen Bromide 0-8 ppm, Hydrogen Chloride 0-8 ppm MIDAS-K-HCL

Boron Trifluoride 0-8 ppm, Hydrogen Fluoride 0-12 ppm, Nitrogen Trifluoride 4-40 ppm and Tungsten Hexafluoride 0-12 ppm kit

Bromine 0-0.4 ppm and Chlorine Dioxide 0-0.4 ppm kit MIDAS-K-BR2

Chlorine 0-2 ppm and Fluorine 0-4 ppm kit MIDAS-K-HAL

Carbon Dioxide 0-2.0% v/v kit MIDAS-K-CO2

Carbon Monoxide 0-100 ppm kit MIDAS-K-COX

Diborane 0-0.4 ppm and Germane 0-0.8 ppm kit MIDAS-K-HYD

Hydrogen 0-1000 ppm kit MIDAS-K-H2X

Hydrogen 0-100% LEL and Methane 0-100% LEL kit

Hydrogen Cyanide 0-20 ppm kit MIDAS-K-HCN

Hydrogen Selenide 0-0.4 ppm kit MIDAS-K-HSE

Hydrogen Sulfide 0-40 ppm kit MIDAS-K-H2S

Nitric Oxide 0-100 ppm kit MIDAS-K-NOX

Nitrogen Dioxide 0-12 ppm kit MIDAS-K-NO2

Oxygen 0-25% v/v kit MIDAS-K-O2X

Ozone 0-0.4 ppm kit MIDAS-K-O3X

Phosphine 0-1.2 ppm kit MIDAS-K-PH3

Phosphorous Oxychloride 0-0.8 ppm kit MIDAS-K-POC

Silane 0-20 ppm and Disilane 0-20 ppm kit MIDAS-K-SHX

Silane low level 0-2 ppm kit MIDAS-K-SHL

Sulfur Tetrafluoride 0-0.8 ppm and Chlorine Trifluoride 0-0.8 ppm kit MIDAS-K-SF4

Sulfur Dioxide 0-8 ppm kit MIDAS-K-SO2

TEOS 0-40 ppm kit MIDAS-K-TEO

MIDAS® detectors are not ETL approved for monitoring in or sampling from classified areas above 25% LEL

MIDAS-K-HFX

MIDAS-K-LEL

16.7 Accessories and Spares

Description Part no.

Sample Line Tubing Duct Adapter

Heater Element for NF

Replacement Pump Assembly for MIDAS

Replacement Internal Air Filter for MIDAS

Pyrolyzing Module MIDAS-A-006

Gas Detector MIDAS-A-007

Gas Detector MIDAS-A-009

Replacement RJ45 restraining strap MIDAS-A-010

PoE Ethernet Injector MIDAS-A-011

PoE 24 point Ethernet Hub MIDAS-A-012

Dummy Sensor (for use with analog module) MIDAS-A-013

IPA Scrubber Kit for CO applications

Replacement IPA Filter

Freon Filter for NF

Pyrolyzing Gas Detector 1830-0027

Flexible Conduit 21” - length

Flexible Conduit 27” - length

Flexible Conduit 36” - length

Operating Instructions and Quick Start Guide for MIDAS

Gas Detector - English MIDAS-A-001

End of line particulate filter

1283K1090

1283K2220

1830-0080

0235-0128

0235-0163

0310-2055

0780248

17 General Specifications

Physical

Size (unit with Sensor cartridge) 120 mm(H) x 63 mm(W) x 145 mm (D) (4.72 x 2.48 x 5.71 in)

Weight (unit with Sensor cartridge) 0.8 kg (1.76 lb)

Pyrolyzer Dimensions

Size 70 mm (H) x 63 mm (W) x 80 mm (D) (2.75 x 2.48 x 3.15 in)

Weight 0.41 kg (0.9 lb)

Power Requirements:

Operating Voltage 24 V Nominal +10 to -15%

Operating Voltage with Power over Ethernet 36-57 Vdc via PoE, 48 V Nominal

Power Consumption:

Transmitter unit < 5 W

With pyrolyzer < 12.95 W

Outputs:

Visual Alarm, power and fault LEDs plus LCD with all gas readings and events.

Relays Alarm1, Alarm2, Fault Relays (3) rated 1.0 A @ 30Vdc or 0.5 A @ 125 Vac, configurable as normally

open or closed, latched or unlatched.

Analog 2 wire Isolated 0-22 mA, Sink or Source

Digital Communications Modbus / TCP Ethernet / Power over Ethernet (PoE)

Service Port RS232C / PPP protocol

Certification & Specification:

European CE Marked for sale in European Community

Meets EN 50270:1999 (Type 2) and EN55011:2000

Environmental ETL approved UL61010B-1 and CSA-C22.2 No. 1010.1-92

Performance Designed to meet UL2075 (pending 2004)

Electrical IEEE 802.3af-2003

Response Times:

Typically Toxic T90 < 30 seconds

Catalytic T90 < 10 seconds

Transport System:

Flow Rate 500 cc / min

Transport Time 2 – 30 seconds maximum

Performance

LDL < LAL LAL = ½ TLV (typically 12% FSD) FSD = Typically 4 x TLV

Sampling Distance:

Tubing Length Up to 30 m (100 feet) with FEP tubing

Ambient Point In line air filter required

Exhaust Length Up to 30 m (100 feet)

Operating Temperature:

Unit with sensor cartridge 0°C to 40°C (32°F to 104°F)

Tubing Requirement:

Sample 6.35 mm OD (1/4”) x 3.18 mm (1/8”), FEP, 30 m (100 feet) maximum dependent on gas type

Exhaust 6.35 mm (1/4”) OD x 4.76 mm (3/16”), FEP, 30 m

Wiring Requirement:

4- 20mA 2 wire, 14 AWG maximum

Digital CAT5 cable or equivalent; RJ45 connector

Gas Concentration Display & Interface:

Instrument 4-digit alphanumeric display with separate units, flow rate bar graph and other icon driven indicators.

Remote Option for PC / PDA internet browser access via Ethernet or other Bus system

Warranty:

Transmitter Unit 1 year

Sensor cartridge 1 year standard, 2 years with extended warranty program

Expected lifetime of pump 2 years

Mounting:

Case Material:

4 button interface membrane keypad

Wall mounted using pre-drilled holes on chassis

Painted steel

18 Calibration and Bump Testing

All MIDAS approved calibration methods to a proven ISO 9000 quality controlled procedure. The MIDAS design is very robust and resistant to long term drift; in fact in a normal operating environment it is possible to extend the calibration interval with MIDAS calibrations). This design feature is another element that supports MIDAS

sensor cartridges are pre-calibrated by Zellweger Analytics using traceable gas standards and

up to 24 months (subject to local requirements concerning

as a long term cost effective gas

sensor cartridge

detection solution.

NOTE: It is the sole responsibility of each user to determine their own calibration and bump test schedule based on their own safety assessments and understanding of local requirements.

Calibration of an electrochemical sensor cartridge is a relatively complex discipline to master and it is possible that in less ideal field conditions the calibration can be far less accurate than under laboratory conditions and therefore substantial inaccuracies can be introduced. In the absence of any formal calibration policy by the end user and due to the low drift and long lifetime of the MIDAS

equipment, it is acceptable that the original factory

calibrations can be retained where appropriate thereby ensuring a high degree of accuracy of calibration

Care must be taken to ensure that the correct materials for an extractive application are obtained from reputable suppliers and are of proven quality and composition. Inappropriate calibration equipment will lead to under or over-presenting the wrong concentration of gas to the sensor cartridge during the calibration period. Likewise contaminated or inadequately flushed tubing and other gas-wet surfaces can also introduce errors into the calibration process. Only qualified, trained personnel should attempt to perform gas calibrations; contact your local Zellweger Analytics Service Representative for further details on calibration services

Bump tests are also used as a quick, low cost and approximate means to present a controlled gas release to the sensor cartridge in order to verify that the transmitter does respond accordingly. Bump testing is popular as typical experiences show that a smaller list of cheaper and easier to handle gases can be used to provide functional tests on a wider range of gas types. In the absence of a formal calibration policy from the end user, Zellweger Analytics would recommend a minimum annual schedule of at least one ‘bump test’ per sensor with the appropriate test gas (see details below).

The risks of bump testing are that it may reduce sensor cartridge lifetime and the accuracy of the calibration if applied incorrectly or too frequently. Testing sensor cartridges with non target gases can also lead to errors and drift related effects.

sensor cartridges have their calibration and bump test gases documented in data sheets that are readily

MIDAS available from Zellweger Analytics.

WARNING: To maintain stated sensor performance when using the pyrolyzer, ensure the constant ambient temperature and humidity levels of the installation point do not exceed the maximum operating temperature andhumidity range. This product can tolerate temporary changes in temperature and humidity, but constant exposure to higher levels of temperature and humidity will require more frequent bump testing or calibrationto confirm working specification.

The following table indicates the recommended calibration or bump test gas for the MIDAS® sensor cartridges:

Please consult with your Zellweger Analytics Service Representative for approved methods and materials before commencing calibrations and bump tests.

Gas Name Chemical

Ammonia NH

Arsine AsH

Boron Trichloride BCl

Boron Trifluoride

Bromine Br

Carbon Dioxide

Formula

Range Sensor

Cartridge Part Number

0-100 ppm MIDAS-S-NH3 Ammonia Ammonia

0-0.2 ppm MIDAS-S-ASH Arsine Phosphine

0-8.0 ppm MIDAS-S-HCL Hydrogen

0-8.0 ppm MIDAS-S-HFX Hydrogen

0-0.4 ppm MIDAS-S-BR2 Chlorine Chlorine

0-2.0% vol MIDAS-S-CO2 Carbon Dioxide Carbon Dioxide

Carbon Monoxide CO 0-100 ppm MIDAS-S-COX Carbon Monoxide Carbon Monoxide

Chlorine Cl

Chlorine Dioxide

Chlorine Trifluoride

Diborane B2H

Dichlorosilane H2SiCl

Disilane Si2H

Fluorine F

Germane GeH

Hydrogen (% LEL)

Hydrogen (ppm)

Hydrogen Bromide

Hydrogen Chloride

Hydrogen Cyanide

Hydrogen Fluoride

Hydrogen Selenide

Hydrogen Sulfide

Methane (% LEL) CH

Nitrogen Dioxide

Nitrogen Oxide

Nitrogen Trifluoride

Oxygen Proficiency & Deficiency

Ozone O

Phosphine PH

Phosphorous Oxychloride

Silane SiH

Silane (low level)

Sulfur Dioxide

Sulfur Tetrafluoride

Tetra Ethyl Ortho Silicate

Tungsten Hexafluoride

MIDAS® detectors are not ETL approved for monitoring in or sampling from classified areas above 25% LEL

ClO

ClF

HBr 0-8.0 ppm MIDAS-S-HCL Hydrogen

HCl 0-8.0 ppm MIDAS-S-HCL Hydrogen

HCN 0-20 ppm MIDAS-S-HCN Hydrogen

HF 0-12 ppm MIDAS-S-HFX Hydrogen

H2Se 0-0.4 ppm MIDAS-S-HSE Silane Hydrogen Sulfide

H2S 0-40 ppm MIDAS-S-H2S Hydrogen Sulfide Hydrogen Sulfide

NO 0-100 ppm MIDAS-S-NOX Nitric Oxide Nitric Oxide

POCl

SiH

TEOS 0-40 ppm MIDAS-S-TEO TEOS Carbon Monoxide

0-2.0 ppm MIDAS-S-HAL Chlorine Chlorine

0-0.4 ppm MIDAS-S-BR2 Chlorine Chlorine

0-0.8 ppm MIDAS-S-SF4 Hydrogen

0-0.4 ppm MIDAS-S-HYD Diborane Phosphine

0-8.0 ppm MIDAS-S-HCL Hydrogen

0-20 ppm MIDAS-S-SHX Silane Hydrogen Sulfide

0-4.0 ppm MIDAS-S-HAL Chlorine Chlorine

0-0.8 ppm MIDAS-S-HYD Diborane Phosphine

0-100% LEL

MIDAS-S-LEL Hydrogen Hydrogen

0-1000 ppm MIDAS-S-H2X Hydrogen Hydrogen

0-100% LEL

MIDAS-S-LEL Hydrogen Hydrogen

0-12 ppm MIDAS-S-NO2 Nitrogen Dioxide Nitrogen Dioxide

0-40 ppm MIDAS-S-HFX Hydrogen

0-25% vol MIDAS-S-O2X Oxygen Air

0-0.4 ppm MIDAS-S-O3X Ozone Chlorine

0-1.2 ppm MIDAS-S-PH3 Phosphine Phosphine

0-0.8 ppm MIDAS-S-POC Hydrogen

0-20 ppm MIDAS-S-SHX Silane Hydrogen Sulfide

0-2.0 ppm MIDAS-S-SHL Silane Hydrogen Sulfide

0-8.0 ppm MIDAS-S-SO2 Sulfur Dioxide Sulfur Dioxide

0-0.8 ppm MIDAS-S-SF4 Hydrogen

0-12 ppm MIDAS-S-HFX Hydrogen

Calibration Gas Recommended Bump Test Gas

Chloride

Fluoride

Chloride

Cyanide

Fluoride

Chloride

Fluoride

Chlorine

Carbon Monoxide

Chlorine

Bump Testing MIDAS

A bump test is not intended to be an accurate calibration, but is used as a confidence check to ensure that the gas detection system is functional. Since some of the target gases are difficult to handle, bump testing often makes use of cross sensitivities so that more convenient gases can be used.

Equipment

The following items are required:

Test gas (see table)

Special regulator for extractive use (if using field calibration cylinder) or suitable sample bag (if not sampling directly from cylinder)

Tubing (suitable for gas being applied)

Preparation

Most of the test gases are highly toxic. It is essential that personnel using these toxic gases be trained in their use. Ensure that the test gas will be vented safely.

Applying test gas may cause alarm, fault or maintenance fault indications on the 4-20 mA loop, relays or digital outputs. Before starting a test, ensure that suitable steps have been taken to prevent these indications from triggering unwanted actions. The MIDAS

has a special mode for bump testing where the alarm outputs are

inhibited (see section 8.4.1).

To test extractive systems we recommend the use of a gas sample bag and allow the extractive unit to draw a sample of gas at its normal working flow rate. Suitable sample bags are available from SKC Inc. (www.skcinc.com). Special regulators for extractive applications to use with field calibration cylinders are also available.

If non-PTFE-lined tube has to be used, response times may be longer than expected, especially when using chlorine. In this case, it is especially important to keep the tubing short.

The pyrolyzer should be tested in the same way as an extractive system, but using NF is not available, chlorine can be used at a concentration of 5 ppm. If using chlorine, the freon filter must be

as the test gas. If NF3

removed from the unit before the test and replaced after the test.

NOTE: A test with chlorine operates the electrochemical cell and the unit’s electronics, but does not test the pyrolyzer module itself.

Target Gas Formula Cartridge

Ammonia NH

Arsine AsH

Boron Trichloride

Boron Trifluoride

Bromine Br

Carbon Dioxide

Carbon Monoxide

Chlorine Cl

Chlorine Dioxide

Chlorine Trifluoride

Diborane B2H

Dichlorosilane SH2Cl

Disilane Si2H

Fluorine F

Germane GeH

Hydrogen H2(ppm) MIDAS-S -H2X 1,000 Hydrogen 1000 500 120

Hydrogen H2(%LEL) MIDAS-S-LEL 100% LEL Methane 500 120

BCl

CO MIDAS-S-COX 100 Carbon

ClO

ClF

Part No.

MIDAS-S-NH3 100 Ammonia 50 500 120

MIDAS-S-ASH 0.2 Phosphine 0.5 500 120

MIDAS-S-HCl 8 Chlorine 5 500 120

MIDAS-S-HFX 8 Chlorine 5 500 120

MIDAS-S-BR2 0.4 Chlorine Low 500 120

MIDAS-S-CO2 2% v/v Carbon Dioxide 2% v/v 500 120

MIDAS-S-HAL 2 Chlorine 2 500 120

MIDAS-S-BR2 0.4 Chlorine Low 500 120

MIDAS-S-SF4 0.8 Chlorine Low 500 120

MIDAS-S-HYD 0.4 Phosphine 0.5 500 120

MIDAS-S-HCl 10 Chlorine 5 500 120

MIDAS-S-SHX 20 Hydrogen Sulfide < 25 500 120

MIDAS-S-HAL 4 Chlorine 5 500 120

MIDAS-S-HYD 0.8 Phosphine 0.5 500 120

Range (ppm) Recommended

Bump Test Gas

Monoxide

Conc. (ppm) Flow Rate

100 500 120

(cc/min)

Max. Time

Target Gas Formula Cartridge

Hydrogen Bromide

Hydrogen Chloride

Hydrogen Cyanide

Hydrogen Fluoride

Hydrogen Selenide

Hydrogen Sulfide

Methane CH

Nitric Oxide

Nitrogen Dioxide

Nitrogen Trifluoride

Oxygen O

Ozone O

Phosphine PH

Phosphorus Oxychloride

Silane SiH

Sulfur Dioxide

Sulfur Tetrafluoride

HBr MIDAS-S-HCl 8 Chlorine 5 500 120

HCl MIDAS-S-HCl 8 Chlorine 5 500 120

HCN MIDAS-S-HCN 20 Sulfur Dioxide 15 500 120

HF MIDAS-S-HFX 12 Chlorine 5 500 120

H2Se MIDAS-S-HSE 0.4 Hydrogen Sulfide Low 500 120

H2S MIDAS-S -H2S 40 Hydrogen Sulfide 25 500 120

NO MIDAS-S-NOX 100 Nitric Oxide 50 500 120

POCl

Part No.

MIDAS-S-LEL 100% LEL Methane 500 120

MIDAS-S-NO2 12 Nitrogen Dioxide 10 500 120

MIDAS-S-HFX 40 Chlorine 5 500 120

MIDAS-S-O2X 25% v/v Air 500 120

MIDAS-S-O3X 0.4 Chlorine Low 500 120

MIDAS-S-PH3 1 Phosphine 0.5 500 120

MIDAS-S-POC 0.8 Chlorine Low 500 120

MIADS-S-SHX 2 Hydrogen Sulfide < 25 500 120

MIDAS-S-SHL 20 Hydrogen Sulfide < 25 500 120

MIDAS-S-SO2 8 Sulfur Dioxide 8 500 120

MIDAS-S-SF4 0.8 Chlorine Low 500 120

TEOS TEOS MIDAS-S-TEO 40 Carbon

Tungsten Tetrafluoride

MIDAS-S-HFX 12 Chlorine 5 500 120

Range (ppm) Recommended

Bump Test Gas

Monoxide

Conc. (ppm) Flow Rate

(cc/min)

Max. Time

100 500 120

Notes

1. If Phosphine is not available, Hydrogen Sulfide can be used to test these sensors. Use a concentration of 2 ppm. Important: this should only be done once to avoid the danger of poisoning the sensor.

2. The ambient Oxygen level is typically 20.9% by volume. If there is a serious problem with an Oxygen sensor, the reading will not be 20.9%. As an extra check, the sensor can be breathed on or temporarily blocked. In either case the reading should decrease.

3. The flow rate is regulated by the Midas unit.

All test gases must be in a balance of air, not Nitrogen.

As an alternative, the actual target gas can always be used instead of a cross-sensitive gas.

Higher concentrations than the recommended ones can be used if necessary, but extra time may be needed for the reading to recover to zero.

IMPORTANT: Do not exceed the recommended concentrations or application times where Hydrogen Sulfide is used to test Silane. Doing this can damage the cell.

Finishing

Wait for the gas reading to return to normal levels. This may take some time, especially if concentrations above the recommended levels have been used or if the test gas has been applied for an extended period of time.

Ensure that any latched faults or alarms that have been generated by the testing have been cleared.

Make sure that the gas detection system is fully restored to its normal operating state and that any control system overrides used during the testing have been removed.

The alarms generated by the testing will have created entries in the transmitter’s history log.

Troubleshooting

If the test does not produce a satisfactory result, check the following points.

1. Check the gas cylinder concentration and type are correct

2. Check the expiration date of the cylinder.

3. Check that there is sufficient gas left in the cylinder.

4. Check that there are no leaks on the test system.

5. Make sure that the tubing length is as short as possible and that there are no blockages.

6. Make sure that the transmitter is not displaying a fault before the test is started.

19 Warranty Statement

All products are designed and manufactured to the latest internationally recognized standards by Zellweger Analytics under a Quality Management System that is certified to ISO 9001.

As such, this instrument (including the pump) is warranted under proper use, to the original end-user purchaser, against defects in materials and workmanship within 24 months from the date of first turn-on. Separate warranty conditions apply to the sensor cartridges limited as indicated below. During this period, Zellweger Analytics will repair or replace defective parts on an exchange basis, F.O.B. to approved service centers on a global basis.

This warranty does not cover damage caused by accident, abuse, abnormal operating conditions or extreme poisoning of the sensor cartridge.

Defective goods must be returned by the Buyer at the Buyer’s own expense to Zellweger Analytics premises accompanied by a detailed report stating the nature of the defect. Returned goods must detail the Service Event Number (SE#) clearly on the package and the Buyer shall obtain an SE# by contacting Zellweger Analytics in advance.

If no such report is included then Zellweger Analytics reserves the right to charge an investigative fee (prices available upon request) before any repair or replacement is performed.

Zellweger Analytics shall not be liable for any loss or damage whatsoever or howsoever occasioned which may be a direct or indirect result of the use or operation of the Contract Goods by the Buyer or any Party.

This warranty covers the gas detector and parts sold to the Buyer only by authorized distributors, dealers and representatives as appointed by Zellweger Analytics. A warranty claim will only be accepted if a proof of purchase is submitted and all conditions obtained within this Warranty are met. When in the opinion of Zellweger Analytics, a warranty claim is valid, Zellweger Analytics will repair or replace the defective product free of charge and send it or any replacement back.

The initial warranty period is not extended by virtue of any works carried out there under.

The decision to repair or replace parts shall be determined by Zellweger Analytics.

Sensor Cartridge Warranties

All sensor cartridges are supplied with a standard 12 months (1 year) warranty; sensor cartridges purchased with an extended warranty for 24 months (2 year) cover period have the same conditions as the standard cartridge conditions as detailed below but for the longer time period of 24 months.

1. The oxygen sensor cartridge is guaranteed to operate satisfactorily for one year from the date of sale (i.e. the date of shipment) and will be replaced at no charge within that period only if it will not provide a correct reading after calibration by authorized service personnel. Physical or chemical damage, resulting from exposure to improper elements, is not covered.

2. The combustible (LEL) sensor cartridge is guaranteed to operate satisfactorily for one year from the date of sale (i.e. from date of shipment). If it will not provide a correct reading after calibration by authorized service personnel, it will be replaced at no charge within that period. This guarantee is void if it has been contaminated by some unusual substance, including but not limited to, water and/or other liquids, oily compounds, corrosives, silicones, lead vapors, extremely high concentrations of combustible gases, and various particulates which may inhibit gas flow to the sensor cartridge element.

3. The toxic sensor cartridges are guaranteed to operate satisfactorily for one year from the date of sale (i.e. the date of shipment). They will be replaced at no charge within that period only if they will not provide a correct reading after calibration by authorized service personnel, and only if the sensor cartridge membranes exhibit no physical or chemical damage resulting from exposure to improper substances.

Note that the MIDAS

sensor cartridge stores an electronic history of each individual sensor cartridge’s

manufacture, warranty and calibration activity that is accessible by authorized Service personnel.

Conditions and Exclusions

To maintain this warranty, purchaser must perform maintenance and appropriate testing as prescribed in the instrument operation manual, including prompt replacement or repair of defective parts and such other necessary calibration, maintenance and repair as may be required in the reasonable judgment of Zellweger Analytics. Normal wear and tear, and parts damaged by abuse, misuse, negligence or accidents are specifically excluded from the warranty.

Purchaser acknowledges that, notwithstanding any contrary term or provision in the purchaser’s purchase order or otherwise, the only warranty extended by Zellweger Analytics is the express warranty contained herein. Purchaser further acknowledges that there are no other warranties expressed or implied, including without limitation, the warranty of merchantability or fitness for a particular purpose; that there are no warranties which extend beyond the description of the face hereof; that no oral warranties, representations, or guarantees of any kind have been made by Zellweger Analytics, its distributors or the agents of either of them, that in any way alter the terms of this warranty; that Zellweger Analytics and its distributors shall in no event be liable for any consequential or incidental damages, including but not limited to injury to the person or property of the purchaser or others, and from other losses or expenses incurred by the purchaser arising from the use, operation, storage or maintenance of the product covered by the warranty; that Zellweger Analytics liability under this warranty is restricted to repair or replacement of defective parts at Zellweger Analytics sole option; and that Zellweger Analytics neither assumes nor authorizes any other person to assume for it any other warranty. The warranty shall be void if serial numbers affixed to the products are removed, obliterated or defaced.

Contact Zellweger Analytics

For all information on ordering, spares and other technical issues please contact the Zenter Customer Center:

Zellweger Analytics – Zenter USA Zellweger Analytics – Zenter Europe & Asia

400 Sawgrass Corporate Pkwy. Wilstrasse 11-U11

Suite 100 CH-8610 Uster

Sunrise, FL 33325 USA

Switzerland

Tel: +1 954 514 2700 + 41 (0) 1 943 4300

Toll Free: +1 800 538 0363 +41 (0) 1 943 4398

Fax: +1 954 514 2784

sales@zelana.co.uk

Email: sales@zelana.com

Website: www.zelana.com

20 SOFTWARE MENU STATE CHARTS

20.1 Top Level

Midas Simulator State Chart

Monitoring

Status

Review

Mode

Selection

Setup

Mode

Selection

Calibratio

Mode

Selection -

Test

Cancel

Up (1 Sec -

Passcode)

Down (1 Sec No Passcode

)

Down

Cancel

Top Level

Accept (Check)

Down

Cancel (X

)

Monitor

Reset Alarms

and Faults (2 Sec Hold)

Additional Button Functions

Setup Mode

Calibration

Mode

Test

Mode

Enter

Passcode

Up (1 Sec -

With Passcode)

Down (1 Sec -

With Pa

sscode)

Cancel

(With Correct

sscode)

(With Incorrect Passcode)

Test - Inhibit

Enter

Passcode

Cancel

(With Correct

Passcode)

(With Incorrect Passcode)

Accept (1 sec -

Passcode)

sec - With Passcode)

20.2 Review Mode

Midas Simulator State Chart

Function

Selection

Show Alar

Function

Selection -

Show

Fault

Cancel

Down

Review

Function

Selection

Show

Network

Down

Cancel

Down

Review - Network

Function

Selection

Show

te/Time

Down

Review - Date/Time

Monitoring

Status

Function

Selection

Show

Even

t Log

Review - Event Log

Down

Cancel

Down

Cancel

Function

Selection

Show

Gas Ca

Down

Cancel

Review - Alarm

Review - Fault

Review - Gas

Calibration

Function

Selection

Show

Software

Down

Review - Software

Cancel

20.3 Review Software Info, Alarm, Fault and Gas Calibration

Midas Simulator State Chart

Function

Selection

Show Alar

Function

Selection

Show Fault

Show

Alarm Rela

Off

State

Show Alarm

tching

Show Fault

Latching

Show Fault

Relay Of

State

Review - Software Info, Alarm, Fault & Gas Calibration

Show

Alarm

Setpoint

Show

Alarm

Setpoint

Show Alarm

Dela

Function

Selection

Show

Gas Ca

Show Last

Gas Ca

Month An

Date

Show Days

To Next

Gas

Show Last

Gas Ca

Year

Show

Alarm

Type

Accept (Check)

Down

Cancel (X

)

Review

Returns to Normal

Operation - Monitoring

Goes

to next Function Selection state. See

Review

state chart for Function Selection

sequence.

Additional Button Functions

Goes to previous Function Selection state. See Review

state chart for Function Selection

sequence

Show

Alarm

Type

Show

Function

Selection

Show

Software

Show Software Revision

Show Software

Checksum

Show Fault

Rela

Configura

tion

20.4 Review Date/Time and Network

Midas Simulator State Chart

Review - Date/Time & Networ

Function

Selection

Show

Networ

Show

Subnet

4th Digi

Show

Subnet

3rd Digi

Show IP

Addres

t Digit

Show

IP Addres

Auto

Manual

Show

Subnet

2nd Digit

Show

Subnet

1st Digi

Show IP

Addres

3rd Digi

Show IP

Addres

2nd Digi

Show IP Addres

4th Digit

Function

Selection

Show

Date/Time

Show

Time

Show

Month an

Date

Show

Year

Accept (Check)

Down

Cancel (X

)

Review

Retu

rns to Normal Operation - Monitoring

Goes

to next Function Selection state. See

Review

state chart for Function Selection

sequence

Additional Button Functions

Goes to previous Function Selection state. See Review

state chart for Function Selection

sequence

20.5 Review Event Log

Midas Simulator State Chart

Review

- Event Log

Function

Selection

Show

Even

t Log

Show

Event Data

Show

Even

t Time

(After Last

Even

(Go To

Firs

Event)

Show

Event Month

and Date

(Before Last

Event - Go To

Event)

Notes:

Events are in chronological order starting with the newest event.

Maximum number of e vents is 7.

3) At Function Selec tion - Show Event Log, the dots from the flow meter show the number of events available.

4) When showing even

t data, the dots from the flow meter show the index of the current event.

Accept (Check)

Down

Cancel (X

)

Review

Returns to Normal

Operation - Monitor ing

Goes

to next Function Selection state. See

Review

state chart for Function Selection

sequence

Additional Button Functions

Goes to previous Function Selection state. See Review

state chart for Function Selection

sequence

20.6 Set-up Mode

Midas Simulator State Chart

Mode

Selection

tup

Function

Selection

Set Alarm

Function

Selection

Set Faul

Cancel

Down

Setup

Function

Selection

Passcode

Down

Cancel

Down

Setup - Passcode

Function

Selection

Set

Network

Down

Setup - Network

Cancel

Function

Selection

Set Ga

Calibratio

Down

Cancel

Function

Selection

te/Time

Setup - Date/Time

Down

Cancel

Setup - Alarm

Setup - Fault

Setup - Gas

Calibratio

Accept (Check)

Down

Cancel (X

)

Setup

When

at Function Selection, 1 second hold goes

Function Selection - Zero Gas Calibration in

Calibration.

When

at Function Selection, 1 second hold goes

Function Selection - Bump Test in Test.

Additional Button Functions

20.7 Set-up Alarm, Fault and Gas Calibration

Midas Simulator State Chart

Function

Selection

Set Alarm

Function

Selection

t Fault

Set Alarm Relay Of

Stat

Set Alarm

Latching

Set Fault

Rela

Configuratio

Set Fault La

tching

Cancel

Setup - Alarm, Fault & Gas Calibration

Set Alarm 2

Setpoint

Set Alarm 1

tpoint

Cancel

Set Alarm

Dela

Function

Selection

t Gas

Calibration

Set Gas

Calibratio

Period

Cancel

Set Alarm 1

Type

Cancel

Accept (Check)

Down

Cancel (X

)

Setup

Save

new set of values if last step in sequence.

Abort changes.

When

setting value, increments or toggle value

(1 second hold for fas ter increment).

When

setting value, decrements or toggle value

(1 second hold for fas ter decrement).

Additional Button Functions

Set Alarm 2

Type

Set Gas

Cancel

Set Fault Relay Of

State

Cancel

20.8 Set-up Date/Time and Network

Midas Simulator State Chart

Setup - Date/Time & Networ

Function

Selection

Set

Network

Set Subnet

4th Digi

Set Subnet

3rd Digi

Cancel

Set IP

Addres

t Digit

Set

IP Address

Auto

Manual

(Man.)

Cancel

Set Subnet

2nd Digi

Set Subnet

1st Digi

Cancel

Set IP

Addres

3rd Digi

Set IP

Addres

2nd Digit

Cancel

Set IP

Addres

4th Digi

Cancel

(Auto)

Function

Selection

Date/Tim

Set Minutes

Set Hours

Cancel

Set Year

Set Date

Format

Cancel

Set MonthSet Date

Cancel

Accept (Check)

Down

Cancel (X

)

Setup

Save

new set of values if last step in sequence.

Abort changes.

When

setting value, increments or toggle value

(1 second hold for faster increment).

When

setting value, decrements or toggle value

(1 second hold for faster decrement).

Additional Button Functions

20.9 Set-up Pass Code

Midas Simulator State Chart

Setup - Passcode

Function

Selection

Set

Passcode

Repeat

Passcode

4th Digi

Repeat

Passcode

3rd Digi

Cancel

Set

Pass

code

2nd Digi

Set

Passcode

t Digit

Cancel

Repeat

Passcode

2nd Digi

Repeat

Passcode

1st Digi

Cancel

Set

Passcode

4th Digi

Set

Pass

code

3rd Digi

Cancel

Accept (Check)

Down

Cancel (X

)

Setup

Saves new passcode after last entry if the two ente

red passcodes are the same.

Abort changes.

When

setting value, increments value (1 second

hold

for faster increment).

When

setting value, decrements value (1 second

hold

for faster decrement).

Additional Button Functions

20.10 Calibration Mode

Midas Simulator State Chart

Mode

Selection

Calibration

Function

Selection

Zero

Gas

Calibration

Cancel

Calibration

Function

Selection

Span

Gas

Calibration

Cancel

Down

Accept (Check)

Down

Cancel (X

)

Calibration

When

at Function Selection, 1 second hold goes

Function Selection - Bump Test in Test.

When

at Function Selection, 1 second hold goes

Function Selection - Set Alarm in Setup.

Additional Button Functions

Function

Selection

4-20

Calibra

tion

Function

Selection

Flow

libration

Down

Calibration - 4-20 mA

Calibra

tion

Calibration - Span Gas

Calibra

tion

Calibration - Zero Gas

Calibration

Cancel

Calibration - Flow

libration

20.11 Calibration Gas Zero and Span

Midas Simulator State Chart

Function

Selection

Zero Ga

Calibration

On Calibration

Success or

Failur

Cancel

Calibration - Gas Zero & Span Calibration

Accept (Check)

Down

Cancel

(X)

Calibration

Abort changes

When

setting value, increments value (1 second

hold fo

r faster increment).

When

setting value, decrements value (1 second

hold fo

r faster decrement).

Additional Button Functions

Zero

Calibration

Prepare Zero

Cancel

Show Gas

Calibration

Result

Stable

Over-Range

Unstable -Rising

Unstable - Flat

Unstable - Falling

Unde

r-Range

Calibration Status

Indicators In

Gas

Bottle Icon (based

last 5 seconds)

Current Settings:

Max Delta for Stability = 2% of Full Scale Ze

ro Gas Range = +/- 10% of Full Scale

Span

Gas Range = Target Conc +/- 20% of Full Scale

Stable

Time Required For Calibration Success = 15 seconds

Calibration Timeout = 60 second

Gas Calibration Result Codes:

PASS Successful Calibration FL:0H Zero Calibration Timeout - Over-Rang

FL:0L Zero Calibration Timeout - Under-Rang

e FL:0U Zero Calibration Timeout - Unstable FL:SH Span Calibration Timeout - Over-Range FL:SL Span Calibration Timeout - Unde

r-Range

FL:SU Span Calibration Timeou

t - Unstable

Function

Selection

Span

Gas

Calibra

tion

Span

Calibra

tion

Select Cal

On Calibration

Success or

Failur

Cancel

Zero Cal

Required

Messag

Accept (if Zero Cal

Not Re

quired)

Cancel

Show Gas

Calibra

tion

Result

Cancel

Accept (if Zero Cal

Required)

At Calibration Result state, saves new calibration values

if calibration was successful.

Select Cal

Gas Type

Enter Span

Gas Conc

Cancel

20.12 Calibration - Flow Calibration

Midas Simulator State Chart

Function

Selection

Zero Ga

Calibra

tion

After A/D Readings

are co

mpleted

Read Flow Zero Offset

Prepare For

Calibratio

Cancel

Calibration - Flow Calibration

Enter

Setpoi

nt 2

Flow

Adjust

Setpoint

Flow

Adjust

Setpoi

nt 2

Flow

Enter

Setpoint

Flow

Read A/D For

Setpoint

Read A/D For

Setpoi

nt 2

Accept (Check)

Down

Cancel

(X)

Calibration

Abort changes

When

adjusting flow, increases flow (simulated

on flow

slider). When entering flow, increments

value

(1 second hold for faster increment).

When

adjusting flow, decreases flow (simulated

on flow

slider). When entering flow, decrements

value

(1 second hold for faster decrement).

Additional Button Functions

After A/D Readings

are co

mpleted

After A/D Readings

are comple

ted

Cancel

Notes:

Setpoint 1 values:

Target Flow

: 350 cc/min Minimum Flow: 300 cc/min Maximum Fl ow

: 400 cc/min

Setpoint 2 values:

Target Flow

: 650 cc/min Minimum Flow: 600 cc/min Maximum Fl ow

: 700 cc/min

For “Adjust Flow” states, flow would be adjust to approximately

the target flow ra

te using the arrow buttons and would be

measured

on an external flowm eter.

For “Enter Flow” states, the actual flow shown on the external

flowme

ter would be entered.

For “Read Flow” states, the display will count down the read

process. Final values

would be saved after the Read Setpoint 2

Flow state.

20.13 Calibration - 4-20 mA

Midas Simulator State Chart

Calibration

- 4-20 mA Calibration

Accept (Check)

Down

Cancel (X

)

Calibration

Abort changes.

When

adjusting, increases output level (1 second

hold

for continuous increase).

When

adjusting, decrease s output level (1 second

hold

for continuous decrease).

Additional Button Functions

Saves new calibration values after last adjustment

Function

Selection

4-20

Calibra

tion

Adjust

4 mA

Adjust

Cancel

20.14 Test Mode

Midas Simulator State Chart

Mode

Selection

Test

Function

Selection

Bump

Test

Cancel

Test

Accept (Check)

Down

Cancel (X

)

Test

When

at Function Selection, 1 second hold goes

Function Selection - Set Alarm in Setup.

When

at Function Selection, 1 second hold goes

Function Selection - Zero Gas Calibration in

Calibration.

Additional Button Functions

Function

Selection

Alarm/Faul

Simulation

Down

Test - Bump Test

Test - Alarm/Fault

Simulation

Cancel

Function

Selection

Inhibi

Test - Inhibit

Down

20.15 Test Bump, Alarm/Fault Simulation

Midas Simulator State Chart

Function

Selection

Bump Test

Bump

Test

Cancel

Test - Bump Test & Alarm/Fault Simulation

Function

Selection

Alarm/Fault

Simulatio

Request

Alarm

Simulatio

Cancel

Request

Alarm

Simulation

Request

Faul

Simulation

Confirm Alarm

Simulatio

Confirm Alarm

Simulation

Confirm

Faul

Simulation

Alarm 1

Simulatio

Active

Alarm 2

Simulation

Active

Fault

Simulation

Active

Cancel

Down

20.16 Test Inhibit

Midas Simulator State Chart

Test

- Inhibit

Accept (Check)

Down

Cancel (X

)

Test

Abort changes

When

setting value, increments value (1 second

hold fo

r faster increment).

When

setting value, decrements value (1

second

hold for faster decr ement).

Additional Button Functions

At Set Inhibit Timeout state or Set Inhibit Level state

(if Inhibit is None), saves new values.

Function

Selection

Bump

Test

Set Inhibit

Leve

Cancel (if entered

from Test

Menu)

Set Inhibit

Timeout

Cancel (if entered

from

Test Menu)

Monitoring

Status

Cancel (if entered

directly

from

Moni

toring Status)

Cancel (if entered

directly from

Monitoring Status

)

Accept (if Inhibit Level

not set to None

)

Accept (if entered

directly

from

Moni

toring Status)

Accept (if entered

from Test Menu)

Accept (if entered

directly from

Monitoring Status

and Inhibi

t Level

set to None

)

(if entere

from

Test

and

Inhibit Leve

t to None)

Start here if

tered directly

from

Monitoring Status

The inhibit levels are:

a) None - no functions are inhibited.

b) Alarms Inhibited - alarm events will be detected, but alarm outputs (relays, 4-20 mA current loop and Ethernet) will be disabled.

c) Alarms and Faults Inhibited - alarm and fault events will be detected, but alarm and fault outputs (relays, 4-20 mA current loop and Ethernet) will be disabled.

d) Full Inhibit - all monitoring functions inhibited. No monitoring is performed and not alarms or faults (except for Inhibit Timeout) will be reported.

21 Contact Details

Contact your local Zellweger Analytics representative or visit Zellweger Analytics’ web site at: http://www.zelana.com

Specifications subject to change without notification.

MDA Scientific and MIDAS

are registered trademarks of Zellweger Analytics, Inc.

For Emergency (after hours) Service, call: +1 (847) 634-2840

PLEASE NOTE:

While every effort has been made to ensure accuracy in this publication, no responsibility can be accepted for errors or omissions. Data may change, as well as legislation, and you are strongly advised to obtain copies of the most recently issued regulations, standards, and guidelines. This publication is not intended to form the basis of a contract.

MDA Scientific midas Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual