User manual DHI PPC4E

[. . . ] PPC4E Pressure Controller/Calibrator Operation and Maintenance Manual © 2010 Fluke Calibration 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. Only use a supply outlet that has a protective earth contact. [. . . ] If there is a password in place, the Password screen will be displayed. Enter the password at the prompt "Enter Password:". If no password has been entered the Security screen will be displayed immediately, bypassing the Password screen. Note At the bottom left of the Password entry screen is a code (SN: sss-nnnn). The first part (sss) is the PPC4E serial number. The second part (nnnn) is a numer that is changed each time the secondary password is used (see 3. 2. 24. 5). Select and Enter a Security from the choices, Off, Low or High (see Table 11 for function access affected by the security level). Entering a choice makes the change and returns to the Main Run Screen. [Back] returns to <Preferences> without making a change. [Esc] or exit to the Main Run Screen without making a change. 4. 7. 7. 6 Edit Security Password [Edit Password] from Security opens the password editing screen. Passwords can be up to six numbers in length and cannot start with a zero. If <0> is entered, the password is made inactive and the user will not be required to enter a password to access the user level menu. This condition, with a security level of Low, is the factory default. Caution Once a password has been entered, the user level cannot be changed without reentering the password or the secondary password. Note The factory secondary password is available in case the user's password has been misplaced or forgotten. It can be obtained by contacting a FLUKE CALIBRATION Authorized Service Center (see Table 31). The factory secondary password is different for all PPC4E's and changes each time it is used. [OK] to accept the change and return to Security. [Back], [Esc] or exit to Security without making a change. Page 67 © 2010 Fluke Calibration PPC4TM OPERATION AND MAINTENANCE MANUAL 4. 7. 8 Control 4. 7. 8. 1 Pressure Limits PURPOSE To set the upper and lower limit pressure value for a pressure range and measurement mode (see Section 3. 2. 20). OPERATION [Settings], <Control>, Pressure Limits opens the screen to edit or reset the Upper and Lower Limits. To modify the upper limit, edit the value, noting the pressure units associated with this value. [OK] to accept changes and return to the Main Run Screen. [Back] to return to <Control> and make no changes. [Esc] or to exit to the Main Run Screen and make no changes. Note · If the current measurement mode is absolute or gauge, there is an upper limit only. The maximum upper limit is 105 % of AutoRange range or 102 % of default RPT range, whichever is smaller. For negative gauge mode ranges, the lower limit is ­ATM for ranges where the maximum is greater than or equal to +ATM and negative of the upper limit for ranges where the maximum is less than +ATM. [. . . ] Internal Lo, an identifier for the lower of two reference pressure transducers internal to PPC4EX. Whether pressure is being measured relative to absolute zero or vacuum (absolute mode) or relative to atmospheric pressure (gauge mode and negative gauge modes). Measurement mode in which the PPC4E indicates gauge pressure (difference from atmospheric pressure), in both positive and negative directions (above and below atmosphere). The difference between the Hi RPT reading and the Lo RPT at the last Vent. [. . . ]