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Installing a Single-Channel
Analog Input Board on a 6850 GC
Agilent 6850 Series II Network GC System
Accessory G3375A
This section reviews the procedure for installing a single-channel analog
input board (AIB) on an Agilent 6850 Gas Chromatograph (hereafter called
the GC.) With the analog board installed, you can connect nonAgilent
detectors with 1 V of analog output to the GC.
This kit contains:
Description
Grommet
Screw, M3 × 0.5, 12-mm long, pan head
™
Torx
screw, M4 × 18-mm long
Screw, M4 × 0.7, 12-mm long
Analog signal cable, general purpose, 6 pins
Analog input board
Detector PCB bracket
Insulation detector blank
MS detector plate
Quantity
Part number
1
0400-0914
1
0515-1084
2
0515-3034
2
0515-2496
1
G1530-60560
1
G1556-60015
1
G2397-00020
1
G1530-00660
1
G2630-20980
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Summary of Contents for Agilent Technologies G3375A
- Page 1 Installing a Single-Channel Analog Input Board on a 6850 GC Agilent 6850 Series II Network GC System Accessory G3375A This section reviews the procedure for installing a single-channel analog input board (AIB) on an Agilent 6850 Gas Chromatograph (hereafter called the GC.) With the analog board installed, you can connect nonAgilent...
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Page 2: Required Tools
Installing a Single-Channel Analog Input Board on a 6850 GC Required tools • Electrostatic protection such as grounded wrist strap (part no. 9300-0969 [large] or part no. 9300-0970 [small]) • T-20 Torx screwdriver • Small, flat-bladed screwdriver • 1/8-inch drill bit and drill Overview Caution Before starting, review the safety information listed at the end of this... - Page 3 Installing a Single-Channel Analog Input Board on a 6850 GC Prepare the GC Load the service method or set all GC temperatures to ambient/35 °C. Allow time for all heated zones to cool. Turn off the GC and unplug the power cord. If you have an injector installed, set it aside.
- Page 4 Installing a Single-Channel Analog Input Board on a 6850 GC Remove the existing detector and flow manifold On the top of the lid, loosen the connector cover plate screws and remove the plate. Cover plate screws (4) Flow manifold (µECD shown) Manifold mounting screws Gas fittings...
- Page 5 Installing a Single-Channel Analog Input Board on a 6850 GC TCD (thermal conductivity detector) – Remove two mounting screws. Mounting screws µECD (micro cell electron capture detector) - Remove four mounting screws. Mounting screws FPD (flame photometric detector) - Remove four mounting screws. You will need a new top cover.
- Page 6 Installing a Single-Channel Analog Input Board on a 6850 GC WARNING The fibrous insulation material can cause irritation to the skin, eyes, and mucous membranes. Always wear gloves when working with the insulation. If the insulation is flaky/crumbly, wear protective eye wear and a respirator. Remove any insulation that may be in the hole under the detector.
- Page 7 Installing a Single-Channel Analog Input Board on a 6850 GC Remove existing detector PC board Since there is room for only one detector on the 6850 GC, you must remove any existing detector PC board before installing the AIB. Loosen the two bottom screws on the detector electronics cover. Caution Board components can be damaged by static electricity;...
- Page 8 Installing a Single-Channel Analog Input Board on a 6850 GC Prepare the detector board for removal. For small boards, such as the µECD shown below, remove the M3 screw that secures the detector board to the printed circuit board (PCB) bracket. M3 screw securing board to bracket Detector board...
- Page 9 Installing a Single-Channel Analog Input Board on a 6850 GC For large boards, such as the FPD board shown below, remove the detector PCB bracket holding the detector board in place. Detector board (FPD shown) Detector PCB bracket mounting screw A/D converter board...
- Page 10 Installing a Single-Channel Analog Input Board on a 6850 GC Unplug and remove the existing detector board from the A/D converter board. An FPD board is shown below. Other detector boards connect similarly. A/D converter board/ detector board connection Disconnect and remove all cables from the old detector board. All detectors –...
- Page 11 Installing a Single-Channel Analog Input Board on a 6850 GC FPD, FID – Unplug the ignitor cable. Pass all cables through the hole to the top side of the lid. The FID PC board is shown below. Ribbon cable connector Ignitor cable connector TCD –...
- Page 12 Installing a Single-Channel Analog Input Board on a 6850 GC If you have a TCD or FPD detector PCB bracket installed, remove the existing detector PCB bracket. Bracket for TCD or FPD removed...
- Page 13 Installing a Single-Channel Analog Input Board on a 6850 GC Position the analog cable Using a small screwdriver, install the grommet into the circular opening in the top of the lid. Route the spade lug end of the analog cable from the circular hole (with grommet installed) underneath the lid thru the top of the lid.
- Page 14 Installing a Single-Channel Analog Input Board on a 6850 GC Install the AIB Caution Board components can be damaged by static electricity; use a properly grounded static control wrist strap when handling the board. Install the new detector PCB bracket using the two 12-mm long M4 screws.
- Page 15 Installing a Single-Channel Analog Input Board on a 6850 GC Connect the analog signal cable to the top of the AIB. Analog cable connected Detector PCB bracket M3 (T-20) screw A/D Converter board Note The AIB cable may be shipped with the black ferrite core positioned right at the end of the cable, secured there with a tie wrap.
- Page 16 Installing a Single-Channel Analog Input Board on a 6850 GC Install the insulation blank and detector plate The 6850 lid is counterbalanced for the weight of installed components, namely GC detectors. Without a detector installed, the lid will open too quickly, posing a hazard to the user and potential damage to the GC.
- Page 17 Installing a Single-Channel Analog Input Board on a 6850 GC Use two 18-mm long M4 screws to install the detector plate over the insulation blank, as shown in the figure below. Detector plate Screws...
- Page 18 Installing a Single-Channel Analog Input Board on a 6850 GC Connect the analog signal cable to your nonAgilent detector Connect the cable to your nonAgilent detector. The table below displays the cable pinouts. The red, brown, and blue leads are not used and can be cut off, if desired.
- Page 19 Installing a Single-Channel Analog Input Board on a 6850 GC...
- Page 20 Indicates earth (ground) terminal. Failure to comply with these precautions violates safety standards of design and the intended use of the instrument. Agilent Technologies Indicates explosion hazard. assumes no liability for the customer’s failure to comply with these requirements.