Instruction Manual

760004-A February 2002

Model NGA 2000 HFID

than 0.5 inches of water. (Monitor display message, Purge Gas (ON) in Miscellaneous Control Parameters menu for correct state. Proper sealing hardware must be used in order to obtain the required purge air in flow rate and case pressure).

•Five case volumes of purge air have been achieved and the three above conditions are present. The time duration to achieve a safe system is a minimum of 6 min. The elapsed time can be monitored in the Technical Startup Analyzer menu. (Moni- tor the Purge Air Green LED (ON), Purge

Control Status (ON), or Purge Air Alarm for indication of the state of the safety system.)

As stated above, proper sealing hardware is crucial to the successful operation of the safety system. Therefore, a specific torque sequence (shown in Figure 3-3) must be followed when the front panel of the module is being reinstalled after removal. All front and rear panel screws must be installed.

NOTE

Do not over-torque rear panel screws.

3-6 Operation

Rosemount Analytical Inc. A Division of Emerson Process Management