Micromeritics ASAP 2420 1-mmHg Transducer Option User manual

Feb 2010 1
Installing the ASAP 2420 1-mmHg Transducer Option
(Units with Serial Number 199 and below)
P/N 242-42805-00
This document contains instructions for installing the 1-mmHg Transducer option only or for
installing both the 1-mmHg transducer and micropore options on an ASAP 2420 analyzer.
Follow the set of instructions that applies to the customer’s system.
Tools Required
The following tools are required for installation of the transducer option:
• 1/2-in. wrench
• 9/16-in. wrench
• 3/4-in. wrench
• Phillips screwdriver
• Small flat-blade screwdriver
Installing the 1-mmHg Transducer Option Only
This set of instructions describes how to install the 1-mmHg Transducer option on an ASAP
2420 system equipped with the Micropore option.
1. Backfill the manifold to 760 mmHg.
2. Close the ASAP 2420 software.
3. Turn off power to the vacuum pumps and to the analyzer.
4. Remove the four retaining screws from the top panel of the ASAP 2420.

Installing the 1-mmHg Transducer Option Only ASAP 2420 1-mmHg Transducer Option
2 Feb 2010
5. Lift the panel up and off the analyzer.
6. The 10-mmHg transducer must be removed from the top of the old transducer block and
installed on the front of the new block, and the 1-mmHg transducer must be installed on
top of the new block. For reference, the following photograph shows the location of the
transducers after installation.
Location of 1-mmHg transducer mounted on top of transducer block
Location of 10-mmHg transducer mounted on front of transducer block
Analyzer Top Panel

ASAP 2420 1-mmHg Transducer Option Installing the 1-mmHg Transducer Option Only
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7. To remove the 10-mmHg transducer, first disconnect the 10-mmHg transducer ribbon
cable from the J8 connector on the transducer board (P/N 202-17706-001).
8. Use a wrench to loosen the nut that connects the 10-mmHg transducer to the transducer
block. Retain the nut, you will use it to reinstall the transducer.
9. Remove the transducer from the block.
J8
10-mmHg
transducer
Connector nut
Transducer
block

Installing the 1-mmHg Transducer Option Only ASAP 2420 1-mmHg Transducer Option
4 Feb 2010
10. Use a wrench to loosen the nuts that connect the transducer block to the manifold tee
connectors and to the gas inlet line, then remove the block.
11. Remove the block mounting screws, connector nuts, and the spacer and ferrules from each
tee connector.
Remove connector nuts
Connector nut
Rear ferrule
Front ferrule
Spacer
Front and rear
ferrules (under
nut)
Screw
Lock washer
Old Block

ASAP 2420 1-mmHg Transducer Option Installing the 1-mmHg Transducer Option Only
Feb 2010 5
12. Assemble the new transducer block, spacers, ferrules and connector nuts.
13. Insert the mounting screws and lock washers into the block and tighten.
14. Use a wrench to tighten the nuts that connect the transducer block to the manifold tee
connectors and to the gas inlet line.
Connector nut
Front ferrule
Spacer
Front and rear
ferrules (under
nut)
Rear ferrule
Screw
Lock washer
New Block
Use new spacers, ferrules, screws and lock washers from the upgrade kit. Do not
replace the ones you removed, they may be damaged.
Tighten connector nuts

Installing the 1-mmHg Transducer Option Only ASAP 2420 1-mmHg Transducer Option
6 Feb 2010
15. Place the connector nut, and front and rear ferrules on the 1-mmHg transducer.
16. Install the transducer on top of the transducer block; tighten securely with a wrench.
17. Connect the ribbon cable to the 1-mmHg transducer and to J7 on the transducer board
(202-17706-001).
Nut
Front ferrule
Rear ferrule
Transducer block
Connector nut (between
transducer and block)
J7
1-mmHg transducer
Transducer board

ASAP 2420 1-mmHg Transducer Option Installing the 1-mmHg Transducer Option Only
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18. Install the 10-mmHg transducer, with new front and rear ferrules, in the front of the
transducer block. Use the connector nut you removed earlier; tighten the nut securely with
a wrench.
19. Make sure the zero adjustment on the 10-mmHg transducer is accessible. You may have to
cut away some of the foam if it interferes with the transducer.
10-mmHg transducer Connector nut
Use new ferrules from the upgrade kit. Do not replace the ones you removed, they may
be damaged.
Zero
adjustment

Installing the 1-mmHg Transducer Option Only ASAP 2420 1-mmHg Transducer Option
8 Feb 2010
20. Attach the ribbon cable from the 10-mmHg transducer to the J8 connector on the
transducer board.
21. Replace the top panel.
22. Replace and tighten the top panel retaining screws.
23. Turn on power to the analyzer and to the vacuum pumps.
24. Install the updated software (refer to the ASAP 2420 Operator’s Manual for instructions).
25. Open the ASAP 2420 software.
J8
10-mmHg
transducer

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26. Select Unit [n] > Show Instrument Schematic > Enable Manual Control.
27. Open valves 7 and 8. Make sure the 1-mmHg and 10-mmHg transducer readings are
displayed on the schematic.
28. Perform a leak test (refer to Appendix D of the ASAP 2420 Operator’s Manual).
29. Calibrate the 1-mmHg, 10-mmHg and 1000-mmHg transducers (refer to Product
Calibration Procedure for the ASAP 2420 (P/N 242-34000-76 Rev C).
30. Perform the following procedures from the Product Calibration Procedure for the ASAP
2420, P/N 242-34000-76 Rev C:
• 5.8 Analysis Servo and Transducer Accuracy Test
• 5.10 System Volume Calibration
• 5.11 Blank Tube Test (Nitrogen)
• 5.12 Reference Chamber Analysis
• 5.13 Nitrogen Standards Test (N2 Surface Area)
• 5.14 Performing a Krypton Blank Tube Test
• 5.15 Krypton Standards Test
1-mmHg transducer 10-mmHg transducer

Installing the 1-mmHg Transducer and Micropore Options ASAP 2420 1-mmHg Transducer Option
10 Feb 2010
Installing the 1-mmHg Transducer and Micropore Options
This set of instructions describes how to install the 1-mmHg Transducer option and the
Micropore option on ASAP 2420 Krypton systems.
1. Backfill the manifold to 760 mmHg.
2. Close the ASAP 2420 software.
3. Turn off power to the vacuum pumps and to the analyzer.
4. Remove the four retaining screws from the top panel of the ASAP 2420.
5. Lift the panel up and off the analyzer.