User manual FLUKE COMPASS FOR MOLBOX

[. . . ] No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of DH Instruments, Inc. DH Instruments makes sincere efforts to the ensure accuracy and quality of its' published materials; however, no warranty, expressed or implied, is provided. DH Instruments disclaims any responsibility or liability for any direct or indirect damages resulting from the use of the information in this manual or products described in it. Mention of any product does not constitute an endorsement by DH Instruments of that product. [. . . ] This option causes the final flow value at a test point to be very close to the cardinal point as read by the molbox. DUT flow: At each flow point in the test, COMPASS continuously readjusts the set point command to the flow controller to adjust the flow to the target value as indicated by the DUT. This option causes the final flow value at a test point to be very close to the cardinal point as read by the DUT. For this selection to operate, the DUT cannot be a manual entry output type. The Regulation Delay entry determines the time, in seconds, between regulation loop cycles. This is how often the set point will be readjusted to get closer to the target value. Setting this value to a time value that is too short relative to the response time of the flow system will result in unstable flow control. The Test Definition [Leak Test] tab is used to specify whether a leak test will be run at the beginning of the test (see Section 7. The purpose of the [Leak Test] tab's fields and settings as well as instructions on how to use them are provided in Table 30. FEATURE System leak test (check box) Leak test after molbloc change (check box ) Abort test on failure (check box) DESCRIPTION Check this box to include a leak test at the beginning of the test. If a leak test is run, results are included in the test's Data File. Use the <Abort test on failure> to cause the test to abort after a leak test failure. Do not check this box if you want the test to continue after a failed leak test. Check this box for a leak test to be run after any molbloc change included in the test point sequence. Use the <Abort test on failure> to determine whether the test should continue after a leak test failure. The Test Definition [Purge] tab is used to specify whether a gas purge routine will be run at the beginning of the test (see Section 7. The purpose of the [Purge] tab's fields and settings as well as instructions on how to use them are provided in Table 31. FEATURE Automatic system purge (check box) Purge after molbloc changes (check box ) Purge target flow (conditional numeric entry field) Purge time (conditional numeric entry field) DESCRIPTION Check this box to include a purge routine at the beginning of a test. The flow rate at which to purge and purge time are set in other fields of this tab. Check this box for a purge routine to be run after any molbloc change included in the test sequence. Determines the duration, in seconds, of any purge routine included in the test. The Test Definition [Data] tab is used to specify whether or not to log certain data items when tests are run. [. . . ] Purge can be included in COMPASS test definitions at the start of a test and/or when a molbloc has been changed. Indication from a molbox of when flow is stable within the stability limit and below the flow Reynolds number limit. The device that will be used by COMPASS as the source of reference flow values when running a test; the flow standard in the test, the value of flow measured by the reference flow device. The pressure transducers used in molbox1 and molbox RFM are referred to as RPTs. [. . . ]