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OZONE MONITOR BMT 932 Manual, Rev. 02/2021

50

Warning:

This product relies on the building's installation for short-circuit (overcurrent) protec-

tion. Ensure that a fuse or circuit breaker no larger than 15 A at 120 VAC (10 A at 240 VAC) is
used on the phase conductor.

Warning:

Disconnect electrical power before opening the cabinet door.

Précaution

: Couper l'alimentation avant d'ouvrier la porte d'analyseur.

Signal contacts (Connector "Output & Control") are as described on page 15. A splash-proof
connector for connection of the supplied serial cable is provided.

The BMT 932 C can be ordered with the option 932C-HAR. This provides a relay which can
switch an alarm horn in case of a High Concentration Alarm. Connection is made through an
additional splash-proof feed-through to the two pole connector on the PCB labeled "Horn". Ca-
ble diameter shall be 6.5 to 10 mm.

Warning:

The equipment connected to the option 932C-HAR shall be fused at 4 A.

Précaution

: Assurer la protection de l’équipement connecté au option 932C-HAR avec une fusible pour 4A.

C4

Operation

The operation of the BMT 932 C is the same as of the standard BMT 932.

For further description of the functions and properties of the cabinet version please refer to the
main part of this manual.

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Summary of Contents for 932

Page 1: ...29 696 77 0 fax 49 3329 696 77 29 OSTI Inc Monterey California USA Tel 1 831 649 11 41 fax 1 831 649 11 51 OZONE MONITOR BMT 932 Manual Rev 02 21 OZONE MONITOR BMT 932 BMT MESSTECHNIK BER LIN OSTI MONTEREY Auto Channel 3 0 123 ppm BMT MESSTECHNIK BERLIN OSTI MONTER EY ...

Page 2: ...Tubing 14 10 3 Moist Sample Gas 14 11 Electrical Installation 15 11 1 Power Connections 15 11 2 Output and Control Terminals 15 11 3 Channel Identification 16 11 4 Emergency Off Relays 17 11 5 Serial Interface 18 12 Switching On the Instrument 18 13 Front Panel Operation 19 Changing Parameters 21 The Menu View Parameters 21 The Menu Set Parameters 23 Unit Ozone 25 Alarms 25 High Alarms 25 Low Alar...

Page 3: ...nd Spare Parts 38 20 Trouble Shooting 39 19 1 Negative Ozone Concentration Values 39 21 Maintenance 40 20 1 Replacement of UV Lamp and Scrubber 40 20 2 Optical System Disassembling Cleaning 41 22 Specifications 42 Appendix A Link Mode Commands 43 Appendix C Cabinet Version BMT 932 C 48 C1 General Description 48 C2 Pneumatic Installation 49 C3 Electric Connections 49 C4 Operation 50 Appendix R Rela...

Page 4: ...tivates the Scrubber Alarm indicating a scrubber failure The ozone concentration is displayed on a two line 40 character alphanumeric display The con centration unit can be changed during operation Additional modifiable parameters are among others Alarm parameters two alarm thresholds for each channel alarm latching audible opening or closing relays EMO circuit to alarm assigment Date and time RS ...

Page 5: ... 0 10 0 20 0 50 0 100 0 250 0 ppmv unit µg m selectable resolution 0 001 ppmv 2 line x 20 character display 19 rack mount 132 x 300 mm H x D 9 kg or wall mount cabinet NEMA 4X 357 x 440 x 133 mm W x H x D 7 kg traceable to international standard NIST CE mark cTUVus NRTL listed 1 3 or 6 sample channels two threshold alarm levels relay contacts three EMO circuits with 6 relays cycle time 20 s per ch...

Page 6: ...ine and from the inter nal high voltage power supply of the UV lamp Warning Always disconnect the instrument from line power before opening it Warning UV radiation can cause eye damage Do not look into the UV lamp without proper eye protection Warning This product relies on the building s installation for short circuit overcurrent protec tion Ensure that a fuse or circuit breaker no larger than 15...

Page 7: ...V radiation Between 200 and 300 nm wavelength Hartley band ozone has one of its strongest absorption bands The maximum absorption in this band occurs at about 254 nm It happens that the strongest mercury line the wavelength of the highest radiation intensity produced by mercury plasma is at 253 7 nm This is the reason why the radiation of a mercury lamp is exceptionally well suited for photometric...

Page 8: ...f Measure ppmv µg m3 1 atm different temperatures The internationally agreed upon definition of ozone content in the ambient air is ppmv parts per million volume of ozone per volume of sample gas The International Standard ISO FDIS 13964 of 1998 defines ambient ozone content as µg m3 at 1 atm 25 C or at 20 C or at 0 C Actually the definition of 1mg m3 1000 µg m3 at 1 atm 20 C usually used in the E...

Page 9: ...ve Scrubber UV Det Temp Press UV Det UV Lamp Timing Flow Control Tests Warnings Photometric Calculations Display Limit Alarms Select Select Flow Meter Catalyst Pump Cuvette Filter Sample Points 6 5 4 3 2 1 Sample Select ERROR WARMUP LAMP LOW LOW FLOW SCRUBBER HIGH ALARM LOW ALARM Purge Block ...

Page 10: ...s not any kind of scrubber really fulfills these demands perfectly The non ideal behaviour of a scrubber material of course depends upon the species and quanti ties of substances contained in the sample air which may be affected by the scrubber In other words The optimal choice of a scrubber material always depends upon the situation in which the ozone monitor is operated For ambient ozone monitor...

Page 11: ...OZONE MONITOR BMT 932 Manual Rev 02 2021 11 446 300 44 120 483 19 132 5 Auto Channel 3 0 123 ppm room for cables tubings OZON E M ONI TOR BMT 932 BMT M ESSTECHN IK BERLIN OS TI MO NTEREY CA Figure 3 ...

Page 12: ...OZONE MONITOR BMT 932 Manual Rev 02 2021 12 Figure 4 R S 232 S IGNA L S E MO C H ID OUT S AMP L E IN 100 240 VA C 35 VA DIS C ONNE C T MAINS B E F OR E OP E NING ...

Page 13: ...inlets this older tubing probably is more or less dirty inside resulting in more or less ozone destruction in the sample gas This is the reason why we strongly recommend that old tub ing be removed and replaced preferably by transparent FEP tubing We strongly recommend to replace SS tubing by FEP tubing in older installa tions One outlet fitting is provided for the sample gas after being measured ...

Page 14: ...ing will most likely lead to measure ment errors Sample tubing has to be 1 4 OD or 6 mm respectively BMT 932C 1 4 only We strongly recommend to use tubing material which is transparent like FEP Transparency is important in case some dirt namely droplets of condensated water would travel along the tub ing With an intransparent tubing e g PTFE droplets are invisible 10 3 Moist Sample Gas When the sa...

Page 15: ...ght side The according special water proof connector comes with the instrument Warning This product relies on the building s installation for short circuit overcurrent protec tion Ensure that a fuse or circuit breaker no larger than 15 A at 120 VAC 10 A at 240 VAC is used on the phase conductor The power receptacle or the mains socket outlet the instrument is connected to should be easily accessib...

Page 16: ...easurement about every 20 seconds The voltage outputs are isolated voltage signals 0 to 10 V and 0 to 1 V proportional to the con centration actually the 0 10V signal swings down to about 0 25 V below zero Input resistance of the load should be higher than 1 k The current output is an isolated current signal 4 to 20 mA proportional to concentration with an offset of 4 mA Input resistance of the lo...

Page 17: ...d to an EMO function becomes active concentration is above threshold the corresponding two relays will open Assignment of alarms to logical EMO functions can be done on the front panel and with the software BMT 932 Link provided with the instrument Max cur rent is 1 A AC or DC at a voltage of 28 V Example three generators with two sample points each have to be monitored by one OZONE MONITOR BMT 93...

Page 18: ...ge 29 for its usage 12 Switching On the Instrument After application of power the instrument will display the following Bootloader VX XX Checking Flash VX XX denotes the software version of the Bootloader The Bootloader is a small application which is run first It checks the contents of the main flash memory for integrity which takes a few seconds The Bootloader is also responsible for updating th...

Page 19: ... a six channel instrument before equipment ozone generators connected to the EMO outputs are allowed to start operation 13 Front Panel Operation The front panel consists of a two line x 20 character alphanumeric display LCD with white backlight illumination and three pushbuttons The concentration display will be updated when ever a new concentration measurement result is available i e every 20 s A...

Page 20: ...easurement modes available are Auto and Manual In Auto mode the monitor will sequently measure concentrations on all active channels see p 28 in 20 s intervals If in Auto mode the ENTER button is pressed the instrument will change to Manual mode meaning that only one channel will be sampled continuously Each time ENTER is pressed in Manual mode the monitor will select the next active channel If EN...

Page 21: ...ng the SCROLL button for 2 s properties can be changed freely The Windows software BMT 932 Link can be used to change this PIN to any other 4 digit number If the PIN is differ ent from 0000 pressing the SCROLL key for 2 s will lead to the display of Enter PIN 0000 Only the correct PIN will allow entry to Set Parameters any other number will lead back to the display of ozone concentration The PIN i...

Page 22: ... Unit of ozone concentration ppmv or µg m Alarms Activation thresholds and latching for each channel or all channels ot once assigment of the available alarms to the three EMO groups closing or opening of Alarm Relays RS 232 Baud rate periodic transmission or polling time interval of periodic transmission Gas Parameters normalizing temperature and pressure Time Date The meaning of these parameters...

Page 23: ...ms EMO3 High Alarms Sniffer On Off Select all or single Channels by pressing SCROLL then ENTER In order to move from View Parameters to Set Parameters the SCROLL button has to be held down for at least 2 seconds The configuration of the BMT 932 can be changed here The diagram shows the selectable pa rameters In order to change a setting the ENTER button has to be pressed Logical variables as e g E...

Page 24: ... m One more example the numerical parameter High Alarm Threshold determines the thresh old above which a High Alarm occurs shall be changed from 0 3 ppm to 0 52 ppm only for channel 2 Button Display 0 000 ppm SCROLL View Parameters SCROLL 2s Set Parameters ENTER Set Ozone Unit SCROLL Set Alarms ENTER Set All High Alarms SCROLL Set High Alarm Ch1 SCROLL Set High Alarm Ch2 ENTER Enable Disable SCROL...

Page 25: ...entration unit is changed the range will change too ppm µg m Range ID 1 000 2000 1 10 000 20000 2 50 00 100000 3 100 0 200000 4 250 0 500000 5 2 000 4000 6 5 000 10000 7 20 00 40000 8 The thresholds of all High and Low Alarms are recalculated automatically Alarms High Alarms High Alarms can be configured for each channel individually or for all channels at once Only active channels see p 28 can be...

Page 26: ...w Alarms can be configured for each channel individually or for all channels at once Only active channels see p 28 can be configured These alarms occur if Enable Disable on a certain channel is activated and concentration is above the limit stored under Threshold The Low Alarm Relay switches to the alarm position At the same time a Low Alarm Event is entered into the Event Log The display alternat...

Page 27: ...acts Channel 5 is not shown because in this case it is not activated Input Output Simulate Analog Out For test purposes the analog outputs can be set to their max 10 V 1 V 20 mA respectively min 0 V 4 mA values With the software BMT 932 LINK any voltage and current can be put out RS 232 This menu item is used to configure the serial interface The User Baud rate can be set to one of the following v...

Page 28: ... Other Parameters Set Active Channels This item can be used to select the channels which shall be sampled Non active channels are skipped in Auto mode and are not selectable in Manual mode Con centration alarm setups and EMO assignment are only possible for active chan nels The display reads Set Active Channels 1Y 2Y 3Y 4Y 5N 6Y In this example all channels except channel 5 are active Set Sniffer ...

Page 29: ...ays Are you sure If ENTER is pressed again parameters are set as described in the following table Parameter Setting Ozone Unit ppm All High Alarm Limits 30 of Range High Alarms enabled Yes High Alarms latched No Low Alarm Limits 10 of Range Low Alarms enabled Yes Low Alarms latched No Date Format dd mm yy RS 232 user output Timed RS 2323 user output interval 1 s User Baud Rate 9600 Baud Alarm Beep...

Page 30: ...mm ss Six Ozone concentrations including unit depending on the setting of Units Ozone posi tion of decimal point depends on range Six blocks of concentration data are always shown even in one or three channel instruments starting with channel one and ending with channel six If there are no data available N A is displayed instead of a concentration value This could have the following reasons Channe...

Page 31: ... The User Mode described above is now deactivated The BMT 932 contains a Link Mode timer Timeout can be set by a Link Mode command This timer is reset by the sending of Link Mode commands to the BMT 932 The instrument will fall back into User Mode automatically if this timer runs out due to Link Mode commands not being received Caution If the BMT 932 is connected to a programmable component a PC o...

Page 32: ...oncentration never to exceed 0 1 ppm In the United States OSHA www osha gov has established a Permissable Exposure Limit PEL of 0 1 ppm TWA 8 hour Time Weighted Average This limit is federal law 29 CFR 1910 1000 The same threshold value is recommended by ACGIH www acgih org for light work and NIOSH www niosh org In addition OSHA recommends a STEL 15 minute Short Term Exposure Limit of 0 3 ppm Loca...

Page 33: ...lay indicate error Lamp High Error In case the lamp becomes too bright for some reason this error is activated Concentration data are inaccurate Error Lamp High is shown on the first line of the display The Error Relay indicates an error The instrument should be thoroughly checked by BMT MESSTECHNIK s also Chapter Trouble Lamp High Warning The Firmware version 1 16 for the OZONE MONITOR BMT 932 in...

Page 34: ...nue operating with the reserve scrubber Measurement results will be correct but the utility scrubber should be replaced as soon as possible The reserve scrubber will also be tested in this mode of operation every 24 hours If it fails the test too Error Res Scrubber is displayed and the analog outputs put out the maximum possible values 1 V 10 V and 20 mA The information that the utility scrubber h...

Page 35: ...e channels with low flow The Error Relay will be in its error postion Measurement results will be inaccurate low 17 Event and Error Log These two logs are stored by the BMT 932 and document important events and errors The last 103 events and the last 16 errors are stored which means that the oldest entries are overwritten when new entries are stored Both logs are read out via the serial interface ...

Page 36: ...parameters displayed are also serial number operating hours etc storing of all modifiable charcteristics in configuration files In order to configure several instruments with the same set of parameters only the corresponding file has to be loaded recording logging of selectable measurement results or parameters such as concentrations alarms etc in an ASCII file on the PC view and printout of all i...

Page 37: ... include both the Error and Event Log The Save and Load functions in the main menu under File are used to save configurations of the BMT 932 onto your PC and load it again at a later time This helps configuring all monitors with the same parameter set in different locations within one project For a more detailed description of the software please refer to the helpfile bmt932 chm to be opened with ...

Page 38: ...onnector 50 pole D Sub connector RelayBox option incl screw driver 0 4 x 2 0mm for spring cage contacts 932 TERM 16 932 TERM 12 932 TERM 7 932 DSUB 50 6 screws and nylon washers set of 4 set of number stickers for sample point set of number bracelets for sample point USA 10 32 x Europe M6 x 16 932 SCREW 10 32 932 SCREW M6 932 STICKER 932 BRACELET 7 4 pole RS 232 connector mains connector tube cutt...

Page 39: ... be displayed by an ozone monitor when 1 the sample contains substances which produce an extinction in the UV range around 254 nm and 2 the scrubber retains these substances partly or completely Even without any ozone contained in the sample the extinction at about 254 nm is lower during the zeroing cycle than during the measur ing cycle which leads to a positive ozone concentration displayed whic...

Page 40: ...oft cloth for installing the new lamp Finally replace the black L shaped lid and insert and fasten both screws The UV lamp itself is held by two lamp holders B and C which are not identical Lamp holder B has a slot L which holds the lamp wire by a grub screw M reaching into the slot The opposite lamp holder C has a plug in contact which in turn holds the UV lamp s wire Caution Do not touch the gru...

Page 41: ...y clean the cuvette and the cuvette windows the cuvette tube the long bar of the Tee has to be removed from the cuvette assembly First disconnect the clear FEP tubing from the SS one touch fitting elbow by pushing the ring and at the same time pulling out the FEP tubing Then pull the black Viton tubing off of the grey plastic nipple other end of the long bar of the Tee Remove both screws using the...

Page 42: ...very 24 h reserve scrubber takes over automatically Warmup Gas ports Compresssion type for or 4x6mm FEP tubing Cabinet version OD only Safety catalyst for off gas included Signal outputs Concentration 4 20 mA isolated active Concentration 0 1 V 0 10 V isolated Sample port identification EMO Control output Lamp low relay contact 30 V 1 A Digital interface RS 232 isolated showing concentration alarm...

Page 43: ...number 6 6 long 8 Auto Manual If Bit 7 of this word is set Manual Mode is selected 8 8 word 9 Concentration float Concentration byte Unit 0 ppm 1 µg m 9 9 float byte 11 Temperature float in Kelvin 11 11 float 12 Operating hours 12 12 long 14 Get Scrubber Test Interval normal 24h 1 99h 14 14 byte 15 Set Scrubber Test Interval normal 24h 1 99h 15 byte 15 16 Get Scrubber Test Timer how many minutes u...

Page 44: ...l EMO 3 setting bits 0 5 assign Low Alarms on channels 1 6 to this function 27 byte 27 28 Set High Alarm EMO Mask 3 Assign High Alarms to logical EMO 2 setting bits 0 5 assign High Alarms on channels 1 6 to this function 28 byte 28 29 Time hh mm ss 29 29 byte byte byte 30 Set Hour 30 byte 30 31 Set Minute 31 byte 31 32 Set Second 32 byte 32 33 Date Format 0 DD MM YY 1 MM DD YY 33 33 byte 34 Set Da...

Page 45: ...us Channel 2 Concentration 10 High Alarm status Channel 3 Concentration 11 High Alarm status Channel 4 Concentration 12 High Alarm status Channel 5 Concentration 13 High Alarm status Channel 6 Concentration 14 High Alarm any Channel Concentration 15 Low Alarm any Channel Concentration 54 Reset all parameters to standard factory setting 54 54 66 Active Channels Shows which channels are active retur...

Page 46: ...38400 95 byte 95 98 High Alarm Parameter Channel 1 float Limit in present unit byte1 Enabled 1 true byte2 Latching 1 true 98 98 float byte1 byte2 99 High Alarm Parameter Channel 2 parameters as above 99 99 float byte1 byte2 100 High Alarm Parameter Channel 3 parameters as above 100 100 float byte1 byte2 101 High Alarm Parameter Channel 4 parameters as above 101 101 float byte1 byte2 102 High Alarm...

Page 47: ...eve concentration unit first 117 float 117 118 Set High Alarm Limit 3 High Limit Low Limit retrieve concentration unit first 118 float 118 119 Set High Alarm Limit 4 High Limit Low Limit retrieve concentration unit first 119 float 119 120 Set High Alarm Limit 5 High Limit Low Limit retrieve concentration unit first 120 float 120 121 Set High Alarm Limit 6 High Limit Low Limit retrieve concentratio...

Page 48: ...m BMT MESSTECHNI K BERLIN OSTI MON TEREY AMBIENT OZONE RANGE S ER NO For sample gas connection FEP or PTFE tubing should be used which will be supplied on re quest The power connector is water proof Dimensions of the cabinet are 357 x 440 x 133 mm W x H x D and weight is less than 7 kg The cabinet must be wall mounted using the four brackets provided at the rear four mounting holes are 6 mm ID spa...

Page 49: ...es in re moval In the OZONE MONITOR BMT 932C accessories kit a Tube Cutter TK 3 SMC Corp is in cluded This cutter tool should be used to cut the front end of the tubing We strongly recommend installation of the BMT 932C together with new sample gas tubing In case some old sample tubing is still in place from a former ozone monitor installation it should be replaced by a fresh FEP tubing TIHB07N or...

Page 50: ...upplied serial cable is provided The BMT 932 C can be ordered with the option 932C HAR This provides a relay which can switch an alarm horn in case of a High Concentration Alarm Connection is made through an additional splash proof feed through to the two pole connector on the PCB labeled Horn Ca ble diameter shall be 6 5 to 10 mm Warning The equipment connected to the option 932C HAR shall be fus...

Page 51: ...r AC can be applied Current per relay should not exceed 1 A Output data of the Relay Box will be updated with every completed measurement If the instru ment is powered off the Low and High Alarms will be active The following table describes the pinout of the D SUB connector Sample Sample ID closing Low Alarm High Alarm Common Opening Closing Common Opening Closing 1 1 34 5 38 22 11 44 28 2 2 18 6 ...

Page 52: ...OZONE MONITOR BMT 932 Manual Rev 02 2021 52 Appendix U UBA Certificate ...

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