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Hach Ultra MET ONE 237AB User Manual Download Page 35

32

Troubleshooting Procedures

7.3.2 Pump optimization

To optimize the pump:

1.

Assemble the pump again. Loosen the setscrew plug in top bracket and make the 
electrical connection to the MET ONE 237 particle counter. 

2.

Turn on the power to the MET ONE 237 particle counter to initiate a count cycle and 
turn on the pump. 

3.

Hold the pump motor steady. 

4.

Rotate the entire pump head in a 180° arc (refer to 

Figure 17

). 

5.

As the pump head is rotated listen for the point where the Rotations per minute 
(RPM) are the greatest. 

6.

Keep the pump head steady and tighten the set screw.

Figure 16  Removal of carbon vanes

1

Carbon vane

Figure 17  Rotation of the pump head

Summary of Contents for MET ONE 237AB

Page 1: ...701076 MET ONE 237AB Particle Detector USER MANUAL June 2008 Edition 5 ...

Page 2: ...701076 MET ONE 237AB Particle Detector USER MANUAL June 2008 Edition 5 Hach Ultra Analytics Inc 2008 All rights reserved Printed in the U S A ...

Page 3: ......

Page 4: ...p 13 4 1 Power up 13 Section 5 Operation 15 5 1 Front panel overview 15 5 2 Setup 16 5 3 Counting modes 16 5 3 1 Manual mode 16 5 3 2 Automatic mode 19 5 3 3 Concentration mode 21 5 3 4 Beep mode 23 5 4 Program the relative humidity and temperature probe RH T 23 5 4 1 Environmental alarms 24 Section 6 Maintenance 25 6 1 Maintenance guidelines 25 6 2 Clean the sensor 25 6 2 1 Battery replacement 26...

Page 5: ...1 A 3 RS485 converter 41 A 4 External printer 42 A 5 PortAll software 42 A 6 Carrying case 42 Appendix B Computer Interface Operations 43 B 1 Data analysis for ISO 14644 43 B 1 1 Computer communications 43 Appendix C PortAll Software 47 C 1 Connections 47 C 2 Operation 47 Appendix D DPU 414 Printer 49 D 1 Printer setup 49 D 2 Counter setup for the printer 50 ...

Page 6: ... and 5 0 micron 5 channel 0 3 0 5 0 7 1 0 2 0 and 5 0 micron 6 channel Coincidence error Less than 5 at 2 000 000 particles cubic feet Power 5 W 10 V approximately 6 V with battery pack Light source Laser diode Sample hold times 1 second to 24 hours Count alarms 1 to 9 999 999 counts Data storage 500 samples rotating buffer Count cycles Up to 100 in Auto mode Locations Up to 250 number appears on ...

Page 7: ...4 Specifications ...

Page 8: ...occur if not observed A symbol if noted on the instrument will be included with a danger or caution statement in the manual This symbol if noted on the instrument references the instruction manual for operation and or safety information Electrical equipment marked with this symbol cannot be disposed of in European public disposal systems after 12 August of 2005 In conformity with European local an...

Page 9: ...s can be damaged by static electricity resulting in degraded instrument performance or eventual failure The manufacturer recommends taking the following steps to prevent ESD damage to the instrument Before touching any instrument electronic components such as printed circuit cards and the components on them discharge static electricity This can be accomplished by touching an earth grounded metal s...

Page 10: ...oncentration mode in the MET ONE 227 particle counter is used to take a brief sample and estimate the probable cleanliness for areas with unknown particulate levels This is based on built in calculations performed in the microprocessor of the counter Long term use in uncontrolled environments such as open air office spaces or outdoor air will require frequent user maintenance The MET ONE 237 parti...

Page 11: ...eam in the sensor The particles in the sample scatter the laser light The sample then passes through the pump and a filter to trap particles in the counter The flashes of scattered light are converted to electronic pulses directly proportional to the amount of scatter to make a correlation to particle size The electronic pulses are counted and stored in channel bins in a data record which includes...

Page 12: ...d inspect for damage Verify that all items listed in Figure 3 are included If any items are missing or damaged contact the manufacturer or sales representative Retain the original packaging materials Use the original packaging material to store or ship the instrument to protect against damage during storage or transportation Figure 3 List of packaged items 1 Isokinetic probes Wand style Catalog No...

Page 13: ... be Mounted directly on machines Suspended from the ceiling Mounted on the wall or through the wall Note Make sure the the isokinetic probes are attached before sampling To install the isokinetic probe 1 Remove the red sensor inlet cap from the MET ONE 237 particle counter Note The isokinetic probes are protected with plastic caps on the openings and should remain in place till they are used in or...

Page 14: ...e printer paper 1 Open the paper tray cover 2 Remove any remaining paper from the last roll Snip the paper at the spool and press PAPER FEED until the paper tray is empty 3 Trim the end of the new paper roll To an arrow shaped edge for a Seiko Printer Figure 5 To a straight edge for a Fujitsu Printer Figure 5 Note The Fujitsu printer has a paper tension release lever that must always be in the Dow...

Page 15: ...ll the RH T probe 1 The RH T probe is connected to the back of the unit refer to Figure 6 on page 12 item 1 2 Attach the RH T probe to the inlet so that the open end faces the direction of the air stream Note Make sure that the RH T probe is attached before the counter is turned on 3 3 Rear panel connections The power switch fuse holders and all connectors are on the rear panel of the counter as s...

Page 16: ...hen turned on Figure 7 on page 15 If the LO BATT indicator is lit plug in the AC adaptor to charge the battery The counter may be operated during the charging of the battery Note Use the AC adapter provided by the manufacturer to charge the battery or operate the counter Other off the shelf power modules may have different power current or polarity which could damage the counter ...

Page 17: ...14 System Start Up ...

Page 18: ...cators Show the current display mode LED display 3 digit display shows parameter and 7 digit display shows value Control keys Used to operate the counter Table 1 provides a description about indicators and key features or functions Figure 7 Front panel of the MET ONE 237 particle counter 1 Status indicators 4 Control keys 2 Display mode indicators 5 Mode keys 3 LED display Table 1 Indicators and k...

Page 19: ... of sampling cycles and so on PROG Helps to program the different settings of the counter This is used to program the date and time enable the printer change the sample period set the alarm limits set the number of sampling cycles and so on UP arrow This is an adjustment key and it helps to navigate up in the choices available It helps scroll through the different sizes the counter is programmed t...

Page 20: ... sample flow rate of 0 1 cubic feet per minute cfm Multiply the results of a 1 minute sample by ten to estimate the actual particle count in a cubic foot of a sample Note Parameters such as Change the sample period refer to section 5 3 1 2 on page 17 and Enable the printer refer section 5 3 1 3 on page 18 are programmed in any order and at any time the counter is not running as long as the steps t...

Page 21: ...e setting in the HH MM SS format for example 08 26 470 The Counting is visible in the seconds field 2 Press and hold the PROG key The light on the PROG key turns red and the HH digits flashes 3 Press and hold the SELECT key until the desired digits flash Use the UP and DOWN arrow keys to change the selected digits to the required value 4 Press and hold the PROG key to save the new settings and exi...

Page 22: ...rammed Period time and Hold time three cycles is typical for a routine verification check Programming a number of cycles greater than one automatically causes the MET ONE 237 particle counter to enter the Average mode An Average mode shows the average count cycles and generates a report for the printer and the memory buffer For example if the number of cycles is set to three the counter will take ...

Page 23: ...hold the PROG key The light on the PROG key turns red and the HH digits begin to flash 3 Press and hold the SELECT key until the required digits begin to flash Use the UP and DOWN arrow keys to change the selected digits to the required value 4 Press and hold the PROG key to save the new settings and exit the programming function The digits will not flash now and the red light on the PROG key will...

Page 24: ...is appropriate for areas where the particulate levels are unknown and may exceed the operating limits of the counter The concentration counting mode does not store write the data records in the memory buffer The concentration mode gives a continuously updated approximation of the number of particles per cubic foot or per liter The approximation is based on a user selectable sample period of one to...

Page 25: ... PROG key turns red and the volume units in the 7 digit display begins to flash 2 Press the UP or DOWN arrow till the required setting is displayed 3 Press and hold the PROG key to save the settings The light on the PROG key will turn off and the display will not flash now 5 3 3 1 Set the sample period To set the sample PERIOD to the desired length 1 Press and hold the SELECT key until the PER lig...

Page 26: ... the remaining size ranges to zero Note The beep mode limits and count alarm limits are the same To change the Beep mode limits 1 Press and hold the SELECT key until the CNT light is lit The 3 digit display will show the particle size channel and the 7 digit display will show the count for that size 2 Press and hold the PROG key The light on the PROG key turns red and the 7 digit display shows the...

Page 27: ...t the low temp level is currently being programmed The 7 digit display shows the current alarm limit and the left digit begins to flash and the scale being used 6 Press and hold the SELECT key until the desired digit flashes Note The temperature scale is only programmable with the HI temperature alarm limit 7 Press the UP and DOWN arrow keys to change the digit to the required value 8 Press and ho...

Page 28: ...iations Important Note Never connect or disconnect the sensor cable from the counter when the counter is on 6 2 Clean the sensor To clean the sensor 1 Remove the six screws three screws on each side that hold the top cover on the counter refer to Figure 11 on page 26 2 Remove the two screws from the sides allowing the chassis tray to pivot for sensor access 3 Disconnect the clear tubing from the s...

Page 29: ...ead and the plate 5 Move the paper to the left and right to clean the print head 6 3 2 Correct light print CAUTION Do not make the print dark as it can cause the print head to be damaged by overheating Important Note Darken it just enough to make the print easily readable The printer PCBA Printed circuit board assembly is on the bottom of the chassis tray To correct the light print 1 Remove the tw...

Page 30: ...head assembly 3 Tilt the chassis tray up as in section 6 3 on page 26 step 1 Locate the printer ribbon cable connector Note The connector must be unlocked by pulling the edges of the connector away from the PCBA before attempting to remove the cable from the connector 4 Carefully remove the cable from the connector 5 Replace the printer ribbon and follow steps 4 to 1 to assemble the printer ribbon...

Page 31: ...28 Maintenance ...

Page 32: ...ck at the bottom of the counter 2 Place the counter on the stand or on any stable surface and charge for 10 12 hours SENSOR The primary cause of this condition is sensor contamination Indicates that the internal particle sensor is no longer operating within acceptable limits and any count data taken during this alarm condition should be disregarded as inaccurate When this alarm occurs 1 Purge the ...

Page 33: ... connection 4 Disconnect the tubing from the pump Note Make sure to note the attachments to the Vacuum V fitting and the Pressure P fitting 5 Use a 1 27 mm or 1 5 mm hex key Allen wrench to loosen the set screw on the bracket on top of the pump refer to Figure 12 6 Push the bracket to one side and remove it from the pump refer to Figure 13 on page 31 7 Remove the top of the pump Note the locator p...

Page 34: ...31 Troubleshooting Procedures Figure 13 Removal of the bracket 1 Bracket Figure 14 Removal of top of the pump 1 Locator pin 2 Top of the pump Figure 15 Removal of the pump body 1 Pump body ...

Page 35: ...the power to the MET ONE 237 particle counter to initiate a count cycle and turn on the pump 3 Hold the pump motor steady 4 Rotate the entire pump head in a 180 arc refer to Figure 17 5 As the pump head is rotated listen for the point where the Rotations per minute RPM are the greatest 6 Keep the pump head steady and tighten the set screw Figure 16 Removal of carbon vanes 1 Carbon vane Figure 17 R...

Page 36: ... mount 2080613 Purge filter 1 2080442 AC adapter 1 770007 115 VAC 770012 230 VAC 770009 100 VAC Thermal printer paper optional 1 460519 RH Temp probe optional 1 2080825 1 High pressure diffuser optional 1 2080372 6 RS485 converter optional 1 2082383 2 Clean room printer paper optional 1 460521 PortAll software optional 1 2084045 Carrying case optional 1 2080879 ...

Page 37: ...34 Replacement Parts and Accessories ...

Page 38: ...36 ...

Page 39: ... location within the same country as the service support center This warranty shall not apply to any defect failure or damage caused by improper use or maintenance or by inadequate maintenance or care This warranty shall not apply to damage resulting from attempts by personnel other than Hach Ultra representatives or factory authorized and trained personnel to install repair or service the instrum...

Page 40: ...38 ...

Page 41: ...ass A EN 500081 1 1992 Emissions EN 55011 1991 Class A Radiated EN 55011 1991 Class A Conducted EN 61326 1998 EN 50082 1 1997 Immunity EN 61000 4 2 Electrostatic Discharge EN 61000 4 3 Electromagnetic Field EN 61000 4 4 Electrical Fast Transient EN 61000 4 5 Surge Test Common and Differential mode EN 61000 4 6 3 Volt Modulated Interfering Signal EN 61000 4 8 Susceptible Magnetic Fields EN 61000 4 ...

Page 42: ...r or event of force majeure iii misuse fault or negligence of or by Buyer iv use of the Products in a manner of which they were not designed v causes external to the Products such as but not limited to power failure or electrical power surges vi improper storage of the Products or vii use of the Products in combination with equipment or software not supplied by Seller If Seller determines that Pro...

Page 43: ...ons A 2 High pressure diffuser The high pressure diffuser refer to Figure 19 is connected to the sensor inlet tubing of the MET ONE 237 particle counter The diffuser permits direct sampling of pressurized air at pressures from 30 to 150 psi A 3 RS485 converter The RS485 converter refer to Figure 20 converts data from RS232 to RS485 format for longer serial networking to a computer Contact technica...

Page 44: ...of the buffer and to display the data on the computer in a spreadsheet format The software performs calculations for Fed Std 209E and ISO 14644 The software includes an adapter for use with a standard 9 pin serial cable Refer to Appendix C on page 47 for additional information A 6 Carrying case The carrying case refer to Figure 22 protects the MET ONE 237 particle counter during shipment and stora...

Page 45: ...r simple serial interface when PortAll software is purchased B 1 1 Computer communications The MET ONE 237 particle counter is setup for RS232 and RS485 serial data communications capabilities RS232 serial interface circuitry Provides asynchronous communications between the counter and computer RS485 serial network circuitry Provides asynchronous communications between up to 64 counters and a cont...

Page 46: ...Record The next record in the rotating buffer will be sent When the rotating buffer is empty a will be sent Each record is erased from the buffer as it is sent If no count cycles have been completed since the counter was turned on then a will be sent The record cannot be sent until the current count cycle is complete R Resend Record The last record sent will be sent again Records sent prior to the...

Page 47: ...vailable from the counter Each data point is preceded by a 3 character tag that identifies the type of data that follows in the next six data characters Figure 24 shows an example of the serial communications format of a MET ONE 237B particle counter Figure 24 Serial communications format example 1 Status 9 Relative humidity 2 Date 10 Location 3 Time 11 Checksum 4 Period 12 End message 5 Channel 1...

Page 48: ...46 ...

Page 49: ... accurate classification result from PortAll software The data returned from the particle counter contains a location number for each sample Change the location number from the front panel instrument controls each time the instrument is moved to a new location The PortAll software relies on the location number as an accurate indicator of the number of sample locations and number of samples per loc...

Page 50: ...ation could result Make sure that the address value does not exceed 31 The PortAll software will not recognize an instrument whose address is outside of the range of 0 31 For ISO 14644 1 The PortAll software stores the ISO classification limits internally in a table as counts per cubic meter Normalize the data in the spreadsheet to counts per cubic meter in order to obtain accurate classifications...

Page 51: ...old the ONLINE button 2 Turn the power switch on 3 When the printer begins to print the default DIP switch settings release the ONLINE button The current settings will be printed and the printer will be in the DIP switch setting mode If the DIP switch settings match the settings in Table 5 on page 50 no changes are necessary 4 Press the FEED button to exit the DIP SW setting mode If changes are ne...

Page 52: ...inter will automatically exit the DIP SW programming mode after the last position is set and print DIP SW setting complete Make sure that the printer is ONLINE when the programming is complete D 2 Counter setup for the printer Connect one end of the printer cable to the printer and the other end to the printer connector port at the back of the MET ONE 237 particle counter refer to Figure 6 on page...

Page 53: ...onsiderations 6 Environmental alarms 24 H High pressure diffuser 41 L Laser safety information 6 LED display 15 M Maintenance guidelines 25 Manual mode 16 Mode Key 15 O operation principle 8 P PortAll software 42 Power up 13 Precautionary labels 5 protocol communication 44 R Relative Humidity Temperature RH T probe 41 Replacement Parts 33 RS485 converter 41 S Safety information 5 statement of conf...

Page 54: ...52 Index ...

Page 55: ...el électrique en Europe doivent désormais retourner le matériel usé ou périmé au fabricant pour élimination sans frais pour l utilisateur Remarque Veuillez vous adresser au fabricant ou au fournisseur du matériel pour les instructions de retour du matériel usé ou périmé aux fins d élimination conforme Ce document est important Conservez le dans le dossier du produit ITALIAN Le apparecchiature elet...

Page 56: ...Trademarks are property of their respective owners Specifications subject to change without notice ...

Page 57: ...ng the details below UK Office Keison Products P O Box 2124 Chelmsford Essex CM1 3UP England Tel 44 0 330 088 0560 Fax 44 0 1245 808399 Email sales keison co uk Please note Product designs and specifications are subject to change without notice The user is responsible for determining the suitability of this product ...

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