User manual FLUKE E-DWT-10000-AF

[. . . ] E-DWT-10000-AF Electronic Deadweight Tester Operation and Maintenance Manual NSN 6685-01-566-1341 © 2008 DH Instruments, a Fluke Company E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL 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. © 2008 DH Instruments, a Fluke Company All rights reserved. Information in this document is subject to change without notice. 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, a Fluke Company 4765 East Beautiful Lane, Phoenix AZ 85044-5318, USA. [. . . ] PRINCIPLE The RPM4-E-DWT has two RS-232 communications ports referred to as COM1 and COM2. COM1 is for communicating with a host computer (see Section 4), and COM2 is reserved for communicating with an external device (e. g. The ports' settings can be viewed and changed using [SPECIAL], <2remote>. RPM4-E-DWT has two remote communications formats, classic and enhanced (see Section 4. 3). The self test allows verification that the RPM4-E-DWT RS232 ports (COM1 and COM2) are operating properly and that a valid interface cable is being used. OPERATION To access the communications settings, press [SPECIAL], <2Remote>. · · Select <1COM1> to view and edit COM1 settings (see Section 3. 9. 2. 1). Select <2COM2> to view and edit COM2 settings (see Section 3. 9. 2. 1. ). Page 55 © 2008 DH Instruments, a Fluke Company E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL · · Select <4format> to select the remote communications command format (see Section 3. 9. 2. 3). Select <5RS232test> to run the COM1 and COM2 communications test (see Section 3. 9. 2. 4). 3. 9. 2. 1 <1COM1, 2COM2> The COMx ports can be set for specific communications settings. The available options are: Baud Parity Length 300, 600, 1 200, 2 400, 4 800, 9 600, 19 200, 28 800, 38 400 NONE, ODD or EVEN 7 or 8 Stop Bit 1 or 2 The default is <2 400, E, 7, 1> for both COM1 and COM2. The user can also specify one or two termination characters, referred to as "Term1" and "Term2", as well as define these characters. These define the characters that mark the end of commands that are sent to the RPM4-E-DWT as well as mark the end of replies sent back to the host computer. The RPM4-E-DWT typically uses the <Term1> character to mark the end, and will ignore the <Term2> character. The defaults are <13> (carriage return) and <10> (line feed) and usually should not be changed. 3. 9. 2. 2 <3IEEE-488> An IEEE-488 interface is not included in the E-DWT A70M/A7M-AF model. 3. 9. 2. 3 <4FORMAT> The RPM4-E-DWT has two different syntax formats available for the remote program commands. The classic remote command format is highly intuitive and conforms with previous DHI PPC and RPM4 products. The enhanced remote command format generally uses the same commands as the classic format, but in addition it follows the syntax, format, and status reporting features of IEEE Std 488. 2. [SPECIAL], <2remote>, <4format> allows the remote program command syntax to be selected. Select <1classic> or <2enhanced> as desired. 3. 9. 2. 4 <5RS232 SELF-TEST> The RS232 self-test is provided to check the RPM4-E-DWT COM ports and the interface cable independently of an external device or computer. If you are having difficulty communicating with RPM4-E-DWT from a host computer using RS232, the RS232 self test can help establish that the RPM4-E-DWT COM1 port you are trying to communicate with and the interface cable you are using are good. To run a self test of the RS232 ports (COM1 and COM2), press [SPECIAL], <2remote>, <5RS232test>. © 2008 DH Instruments, a Fluke Company Page 56 3. OPERATION The display prompts you to connect COM1 to COM2 using a standard pin-to-pin DB-9F to DB-9M RS232 cable. The test is first executed in the COM1COM2 direction and then in the COM2COM1 direction. [. . . ] Measurement mode in which the Q-RPT indicates gauge pressure (difference from atmospheric pressure), but only in the positive direction (above atmosphere). A difference in height between the RPM4-E-DWT reference level and the DUT. A DISPLAY function in which the highest and lowest pressure measurements since reset are recorded and displayed. The designation of a single Q-RPT in an RPM4-E-DWT, or, if there are two, the one that has the highest full scale default range. [. . . ]