2-13
Installation
Hazardous Locations
Installations
The transmitter is designed with explosion-proof housings and circuitry
suitable for intrinsically safe and non-incendive operation. Each
transmitter is clearly marked with a tag indicating the approvals
carried. To maintain certified ratings for installed transmitters, install
in accordance with all applicable installation codes and approval
drawings. Verify that the operating atmosphere of the transmitter is
consistent with the appropriate hazardous locations certifications. Both
transmitter covers must be fully engaged to meet explosion proof
requirements. Refer to Appendix D: Hazardous Area Approval
Installation Drawings for transmitter installation drawings.
IMPORTANT
Once a device labeled with multiple approval types is installed, it
should not be reinstalled using any of the other labeled approval types.
To ensure this, the approval label should be permanently marked to
distinguish the used from the unused approval type(s).
INSTALLATION
PROCEDURE
Installation consists of mounting the transmitter and sensor and
making electrical connections. If you are mounting the transmitter
directly to the sensor assembly, use the process shown in Figure 2-13. If
you are mounting the transmitter apart from the sensor assembly, use
conduit between the sensor and transmitter. The transmitter accepts
male conduit fittings with
1
/
2
–14 NPT, M20 × 1.5 (CM 20), PG 13.5
(PG 11), or JIS G
1
/
2
threads. Make sure only qualified personnel
perform the installation.
Typical North American
Configuration
1. Mount the thermowell to the pipe or process container wall. Be
sure to install and tighten thermowells and sensors. Perform a
leak check before starting the process.
2. Attach any necessary unions, couplings, and extension fittings.
Be sure to seal the fitting threads with silicone or tape (if
required).
3. Screw the sensor into the thermowell.
4. Verify all sealing requirements for severe environments or to
satisfy code requirements.
5. Attach the transmitter to the thermowell assembly. Be sure to
seal all threads with silicone or tape (if required).
6. Pull sensor leads through the extensions, unions, or couplings
into the terminal side of the transmitter housing.
7. Install conduit for field wiring to the remaining conduit entry of
the transmitter.
8. Pull the field wiring leads into the terminal side of the
transmitter housing. Avoid contact with the leads and terminals.
9. Attach the sensor leads to the transmitter sensor terminals.
Attach the power leads to the transmitter power terminals. Avoid
contact with the leads and terminals.
10. Attach and tighten both transmitter covers. Both transmitter
covers must be fully engaged to meet explosion-proof
requirements.
See “Safety Messages” on page 2-1 for complete warning information.