Woburn, MA 01801

Telephone: (781) 935-4600

                                        TECHNICAL SERVICE BULLETINS



                                                                                     TSB-2008002

Date: March 3, 2008

Application: All oxygen sensor and analyzer types, all ranges of operation

Summary: Storage of Delta F Oxygen Sensor recommendation

Details: If the analyzer/sensor will not be placed into active service for a period of 30 days or longer, add electrolyte to the
              sensor and carefully store the analyzer/sensor with the electrolyte installed. Clearly label the sensor and analyzer, if applicable,
              warning electrolyte is in the sensor and it should be handled very carefully.

TSB-2008001

Date: February 1, 2008

Application: All oxygen sensor and analyzer types, all ranges of operation

Effective: Immediately

Summary: New Oxygen Sensor Startup Procedure

Description of Change:

Old Instruction: At the time of initial startup of all Delta F oxygen sensors, the electrolyte should be poured into the sensor
and the gas and power can be applied immediately.

New Instruction: At the time of initial startup of all Delta F oxygen sensors, the electrolyte should be poured into the sensor
and allowed to sit for 60 minutes before gas and voltage are applied.

                                                                                                                                 TSB-2007905

Date:      September 5, 2007

Application: All DF 700 Series Analyzers

Effective: Immediately

Summary: UTMA Firmware vX.0.9 Release – Summary of changes since vX.0.8.

Software Changes

1.    E Sensor Support: Reference to Replenishment Solution added to all menu items and reports. No changes made that affect PPB reading.

NOTE: These changes only affect DF-760 systems. But Delta F highly recommends that sites with multiple 700 series instruments be upgraded to the same firmware revision to insure optimum analyzer performance and factory support.

                                                                                                                    TSB-2007601

Date:      June 18, 2007

Application: All DF 700 Series Analyzers

Effective: Immediately

Summary: UTMA Firmware vX.0.8 Release – Summary of changes since vX.0.7.

Software Changes

1.    USB Flash Drive Support: This software can be configured to direct all data downloads and uploads to either the floppy drive (Drive A:) to the USB Flash Drive (Removable Drive D:) and is required for all systems equipped with an USB port.

These changes only affect systems equipped with USB ports.

2.    Improved System Watchdog: Low-level system errors reported as Error 222 no longer trigger a system reboot. Instead a system reset is activated at the application level resulting in quicker system recovery and data verification to eliminate “bogus” moisture data.

This change improves the reliability of the analyzer and eliminates false readings that can result from a complete system reboot.

3.    Delta F highly recommends upgrading to this firmware version.

                                                                                                                    TSB-20061201

Date:      December 18, 2006

Application: All DF 700 Series Analyzers

Effective: Immediately

Summary: UTMA Firmware vX.0.8 Release – Summary of changes since vX.0.7.

Software Changes

1.    Peak Lock Enhancement: The peak lock algorithm has been improved to eliminate over-corrections to the laser control current to maintain peak centering. These changes are focused on improving system reliability and preventing false peak lock errors.

The customer will notice no changes in the operation of the analyzer and fewer 102 errors.

2.    Improved Diagnostic Data Download: The diagnostic download now creates a single compressed file to include all data files. The diagnostic information has been enhanced and now contains data for 7 days from the date of the requested download (instead of 2 days) and also a critical parameter trending file (new feature). The trend file is automatically created during the upgrade and update weekly. The diagnostic download now creates a single compressed file to facilitate data transfer.

This feature was added to improved customer support efficiency by providing critical historic data for the instrument as well as reduces the need for the customer to download additional data files. This enhancement does not affect the system operation and is transparent to the user.

3.    Service Enhancement: Several features added to improve serviceability. For example, a new menu item was added to Service Menu to reset the laser temperature to the factory setting or adjust it to a new setting. These features require the user to contact Customer Service.

This enhancement does not affect the system operation and is meant to be a Service Only item.

4.    Oxygen Sensor Diagnostic Menu: The Polarization Voltage item was removed for the menu since the output was not precise enough to help diagnose a problem with the oxygen sensor.

This menu now displays the Electrolyte, Temp and Flow only. This change does not impact system operation and is for diagnostics only.

5.    Fan Alarm Update: The Fan Alarm routine was changed to eliminate a condition that would indicate a Fan Alarm Status when the fans were operating properly.

This enhancement is recommended to eliminate a possible nuisance false alarm status.