Installing The Npt Ex Seal - Teledyne Meridian User Manual

4.1.13 Installing the NPT Ex Seal

The NPT Ex seal is used to maintain the explosion proof/flame proof integrity of the enclosure. The following
describes installing between the device and a Meridian junction box assembly in the field. Refer to
NPT Ex Seal Installation.
NOTE: This procedure is only necessary if you did not originally order the device configured in this
manner from the factory.
WARNING: ENSURE RECEIVERS AND POWER SUPPLIES ARE NOT POWERED WHEN
INSTALLING PCB INTO THE DEVICE. FAILURE TO DO SO COULD RESULT IN INJURY OR
DEATH.
WARNING: ENSURE THE ATMOSPHERE IS FREE FROM COMBUSTIBLE AND/OR TOXIC
GASES PRIOR TO STARTING THIS PROCEDURE. FAILURE TO DO SO COULD RESULT IN INJURY
OR DEATH.
1. Unscrew the setscrew and housing cover.
2. Pull on the LCD PCB/CPU PCB set away from the four (4) standoffs.
Information contained herein is classified as EAR99 under the U.S. Export Administration Regulations. Export, reexport or diversion contrary to U.S. law is
Figure 4-7: NPT Ex Seal Installation
USE AND DISCLOSURE OF DATA
prohibited.
MERIDIAN
UNIVERSAL GAS DETECTOR
INSTALLATION
Figure 4-7:
4-17