GC/MS PARTS

Part #: GLTS-0905-1242 replaces obsolete Agilent 0905-1242

5972 MSD Analyzer O-ring that seals between top plate and manifold. Customers often wait far too long to replace this seal after it looses its resiliency or suffers surface damage, generating air leaks. It costs less than a filament from Agilent!

Part #: GLTS-05971-60412 replaces obsolete Agilent 05971-60412

5971/5972 MSD Filament Cable Assembly. This is one of the causes of intermittant signal degradation in MSDs. The relatively high current and low voltage used in the filament circuit is sensitive to any contact resistance. Over time, and with repeated handling, the connections can develop resistance. This effectively changes the heating of the filament, and therefore its emmisivity of electrons, which then changes the ionization levels in the source. Worn connections and broken clips on the original cables can contribute to poor contact as well. This is a primary replacement part when 5971 & 5972 MSD response is becoming unstable, and all of the "usual suspects" have already been addressed.

Part #: GLTS-05971-60424 replaces obsolete Agilent 05971-60424

The 5971 diffusion pump has two sensors that are used to tell when the pump is in an appropriate temperature range for operation. The "Too Cold" sensor tells the MSD to continue waiting before allowing the energizing of the analyzer's voltages to prevent damage when a poor vacuum may exist. The "Too Hot" sensor is a critical function that declares the heating of the pump has run away, which then causes the MSD to lock out diff pump heating to prevent possible backstreaming. Both sensors have their place and are useful assets in maintaining proper operation.

If either the "Too Hot" or "Too Cold" sensor becomes intermittent, then the MSD will at best be intermittently "offline", or at worst, will be shutting down the diff pump system as if an emergency exists, requiring a power cycling of the MSD to clear the "Too Hot" error.

This sensor set comes with two new sensors, a new wiring harness and connector, a pin extractor tool to release the diff pump power leads from the old connector, and heat-sink compound to properly mount the new sensors on the diff pump stack for proper operation. This 5971 version of the sensor set has longer leads to connect it internally to the Power/Vac board within the MSD. The 5972 version has shorter leads that mate with a connector on the rear frame of the MSD.

You might consider changing the diffusion pump cooling fan that directs a cooling stream of air across the upper portion of the pump. We have seen that after around 7 years of operation, the sleeve bearings can start to bind and cause a changing fan speed, which directly changes the high vacuum pumping capacity of the diff pump. By the time that an operator can hear the fan making noise, it will have already been playing with changing the system's sensitivity for some time!

Part #: GLTS-05972-60402 replaces obsolete Agilent 05972-60402

The 5972 diffusion pump has two sensors that are used to tell when the pump is in an appropriate temperature range for operation. The "Too Cold" sensor tells the MSD to continue waiting before allowing the energizing of the analyzer's voltages to prevent damage when a poor vacuum may exist. The "Too Hot" sensor is a critical function that declares the heating of the pump has run away, which then causes the MSD to lock out diff pump heating to prevent possible backstreaming. Both sensors have their place and are useful assets in maintaining proper operation.

If either the "Too Hot" or "Too Cold" sensor becomes intermittent, then the MSD will at best be intermittently "offline", or at worst, will be shutting down the diff pump system as if an emergency exists, requiring a power cycling of the MSD to clear the "Too Hot" error.

This sensor set comes with two new sensors, a new wiring harness and connector, a pin extractor tool to release the diff pump power leads from the old connector, and heat-sink compound to properly mount the new sensors on the diffusion pump stack for proper operation. This 5972 version of the sensor set has shorter leads that mate with a connector on the rear frame of the MSD. The 5971 version has longer leads to connect it internally to the Power/Vac board within the MSD.

You might consider changing the diffusion pump cooling fan that directs a constant cooling stream of air across the upper portion of the pump. We have seen that after around 7 years of operation, the sleeve bearings can start to bind and cause a changing fan speed, which directly changes the high vacuum pumping capacity of the diff pump. By the time that an operator can hear the fan making noise, it will have already been playing with changing the system's sensitivity for some time!

Part #: GLTS-05971-60540 replaces obsolete Agilent 05971-60540

The 5971 diffusion pump directs a constant cooling stream of air across the upper portion of the pump. We have seen that after around 7 years of operation, the sleeve bearings can start to bind and cause a changing fan speed, which directly changes the high vacuum pumping capacity of the diff pump. By the time that an operator can hear the fan making noise, it will have already been playing with changing the system's sensitivity for some time!

This new fan is mounted in a 5971-style frame with its grill, and the proper lead length and connector.

Requires the return of the old fan & mount to GLTS for remanufacturing.

Part #: GLTS-05972-60540 replaces obsolete Agilent 05972-60540

The 5972 diffusion pump directs a constant cooling stream of air across the upper portion of the pump. We have seen that after around 7 years of operation, the sleeve bearings can start to bind and cause a changing fan speed, which directly changes the high vacuum pumping capacity of the diff pump. By the time that an operator can hear the fan making noise, it will have already been playing with changing the system's sensitivity for some time!

This new fan is mounted in a 5972-style frame with its grill, and the proper lead length and connector.

Requires the return of the old fan & mount to GLTS for remanufacturing.

Part #: GLTS-G1946-80001 replaces original Agilent G1946-80001 & G1946-89001

Refurbished Edwards EXT250 Hi-Performance Turbo Pump with Drag Stage (needed for LC/MS applications). Requires return of defective pump with non-locked rotor to GLTS in repairable condition. If rotor is locked or the turbo rotor is crashed, then replacement unit price is $1500 higher.

Part #: GLTS-G2589-80062 replaces original Agilent G2589-80062 & G2589-89062

Refurbished Edwards EXT255 Hi-Performance Turbo Pump with Drag Stage (needed for LC/MS applications). Requires return of defective pump with non-locked rotor to GLTS in repairable condition. If rotor is locked or the turbo rotor is crashed, then replacement unit price is $1500 higher.

Part #: GLTS-05990-65412 replaces Agilent 05990-65412 & 05990-69412

Working SmartCard II Plus (sometimes referred to as SCII++) that communicates over HPIB to GC/MS ChemStation. Originally found in later 5973A MSDs, this card can also be used in a 5971 or 5972 in place of a SmartCard II, with the addition of a SmartCard Cable Upgrade Kit.

Set DIP switch position 1 "down" for 5971/2, and "up" for 5973A.

See also the Static Strap in the "Tools" section to protect your investment while installing it.

Requires return of former SmartCard to GLTS.

Part #: GLTS-05990-65410 replaces Agilent 05990-65410 & 05990-69410

Working SmartCard II Plus that communicates over HPIB to GC/MS ChemStation for the 5973A only.

See also the Static Strap in the "Tools" section to protect your investment while installing it.

Requires return of former SmartCard to GLTS.

Part #: GLTS SCII Cable Upgrade Kit

This cable upgrade kit allows the use of a newer SmartCard II Plus (05990-6X412) in a 5971 or 5972 MSD. The original rear panel connectors have internal cables for the HPIB bus and the Remote Start cable that won't match the newer SmartCard. Kit includes the HPIB cable and Remote cable with rear panel sockets.

See also the Static Strap in the "Tools" section to protect your investment while installing it.