User manual FLUKE E-DWT-H

[. . . ] E-DWT-H Electronic Deadweight Tester Operation and Maintenance Manual © 2009 DH Instruments, a Fluke Company E-DWT-H OPERATION AND MAINTENANCE MANUAL W Warning · High pressure liquids and gases are potentially hazardous. Energy stored in these liquids and gases can be released unexpectedly and with extreme force. High pressure systems should be assembled and operated only by personnel who have been instructed in proper safety practices. This instrument is not to be operated in any other manner than that specified by the manufacturer. · © 2009 DH Instruments, a Fluke Company All rights reserved. Information in this document is subject to change without notice. [. . . ] The display prompts you to connect COM1 to COM2 using a standard pin-to-pin DB-9F to DB-9M RS232 cable. Once the cable has been installed, press [ENT] to run the self-test. The test is first executed in the COM1COM2 direction and then in the COM2COM1 direction. If the COM1COM2 test passes: <PASSED> displays briefly and the test proceeds to COM2COM1. If COM2COM1 passes: <PASSED> is displayed briefly followed by the conclusion, <The RS232 test has PASSED>. If a test fails: Execution is suspended until [ENT] is pressed. Note The RPM4-E-DWT RS232 test can fail for three reasons: The RS232 cable being used is incorrect (Section 4. 2. 1. 1, 4. 2. 1. 2) for information on the correct cable). COM1 and COM2 do NOT have the same serial communications settings and therefore cannot communicate together (see Section 3. 9. 2. 1 to set the COM ports). The reason for failed communications is almost always a cable or incorrect RS232 interface settings. Be sure that these are correct before concluding that a COM port is defective. © 2009 DH Instruments, a Fluke Company Page 60 3. OPERATION 3. 9. 3 <3HEAD> PURPOSE To view or change the properties of the HEAD function (see Section 3. 7. 8) including the unit of measure of length for head height entry and the test fluid type and species for density calculations. OPERATION From the MAIN RUN screen, press [SPECIAL], <3Head>. Select the desired height unit of measure and press [ENT]. Select <1gas> or <2liqud> depending on the pressurized medium between the RPM4-E-DWT and the height at which pressure is to be calculated. The liquid selection <3User>, is to create a custom liquid with a user entered density. Use [HEAD] to set a head height if desired. 3. 9. 4 <4SDS> PURPOSE This feature is not used in RPM4-E-DWT A70M/A7M-AF. 3. 9. 5 <5prefs> PURPOSE To access a menu of RPM4-E-DWT operational preferences and functions. OPERATION To access the PREFS menu press [SPECIAL], <5prefs>. The display is: The PREFS menu includes: <1ScrSvr> View and change the screen saver activation time (see Section 3. 9. 5. 1). <2sound> View and change the key press sounds (see Section 3. 9. 5. 2). <3time> <4ID> <4level> View and edit the internal time and date settings (see Section 3. 9. 5. 3). View the RPM4-E-DWT serial number (SN) and view or edit the ID number (see Section 3. 9. 5. 4). View and set the user security level and/or password (see Section 3. 9. 5. 5). 1ScrSvr 2sound 3time 4ID 5level 3. 9. 5. 1 <1SCRSVR> PURPOSE To adjust the idle time after which RPM4-E-DWT's SCREEN SAVER activates. [. . . ] Used by the AutoZ function to compensate Q-RPT readings for zero drift over time. Atmospheric pressure (zero gauge) for RPM4-E-DWT A70M/A7M-AF. Pressure adder, used to offset a Q-RPT or barometer to calibrate it. Pressure multiplier, used to adjust span of a Q-RPT or barometer to calibrate it. [. . . ]