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If there are agitators in the tank, the instrument should be installed as far away from
these as possible. Once the installation is completed, the ""virtual echo learning" should
be carried out while the agitators are running. This will eliminate the influence of false
echo generated by mixing blades. If foam, strong liquid agitation or only a narrow clear
volume is available then the customer should consider a guided wave radar sensor
such as the Honeywell SLG-700 series.
Figure 5: Agitation
WIRING
Wiring must comply with local codes, regulations and ordinances.
Grounding may be required to meet various approval body certification,
for example CE conformity. Refer to the SmartLine Level Non-Contact
Radar User's Manual, Document #34-SL-25-13.
HART / 4-20mA Operating Ranges
The Power supply and the output current signal are carried by the same two-core cable.
The allowed supply voltage range is 12V to 30Vdepending on loop resistance. There
must always be between 12V and 30V on the transmitter terminals, regardless of loop
current. A safety barrier (refer to
Table 5
between the power supply and instrument for the intrinsically safe version.
The grounding mode of current output can be adopted for the standard instrument, while
the floating current output should be adopted for the intrinsically safe instrument.
Normally, the grounding terminals can be connected to the grounding point of tank or an
available nearby ground in case of plastic tank.
Maximum Loop Resistance (Ω)
Figure 7: Maximum Loop Resistance (Ω)
Table 5: Maximum Loop Resistance (Ω)
Supply Voltage (VDC)
12
17.5
23
30
for detailed specification) should be placed
Max. Loop
Resistance (Ω)
0
250
500
818
Quick Start Installation Guide
Conduit Entry Plugs and Adaptors
Procedures
It is the User/Installer's responsibility to install the transmitters in accordance with
national and local code requirements. Conduit entry plugs and adapters shall be
suitable for the environment, shall be certified for the hazardous location when required
and acceptable to the authority having jurisdiction for the plant.
CONDUIT ENTRY PRECAUTIONARY NOTICE
THE CONDUIT/CABLE GLAND ENTRIES OF THIS PRODUCT ARE SUPPLIED
WITH PLASTIC DUST CAPS WHICH ARE NOT TO BE USED IN SERVICE.
IT IS THE USER'S RESPONSIBILITY TO REPLACE THE DUST CAPS WITH
CABLE GLANDS, ADAPTORS AND/OR BLANKING PLUGS WHICH ARE
SUITABLE FOR THE ENVIRONMENT INTO WHICH THIS PRODUCT WILL BE
INSTALLED. THIS INCLUDES ENSURING COMPLIANCE WITH HAZARDOUS
LOCATION REQUIREMENTS AND REQUIREMENTS OF OTHER GOVERNING
AUTHORITIES AS APPLICABLE
Conduit entry
with plug
installed
Figure 6: Electronic Housing Conduit Entries
Use the following procedures for installation.
Conduit Entry Plugs
Step
1
Remove the protective plastic cap from the threaded conduit entry.
To ensure the environmental ingress protection rating on tapered
2
thread (NPT), a non-hardening thread sealant may be used.
Thread the appropriate size conduit plug (M20 or ½" NPT) into the
conduit entry opening. Do not install conduit entry plugs in conduit
3
entry openings if adapters or reducers will be used.
Tighten adapters according to the following torque:
Torque: 32 Nm or 24 lb-ft
4
Note: Plugs do not come installed in the housings. All housings come with
temporary plastic dust protectors (red or blue) installed and are not certified for
use in any installation.
A regular two conductor cable can be used as the power supply cable, and the
outside diameter of the cable should be (5-9) mm to ensure the sealing of cable
entry. The two ends of the shielded cable should be grounded only where allowed by
the installation location. In hazardous locations, only one end of the cable can be
shielded, typically on the non-hazardous side.
Remove the display to access the wiring connections
Figure 8: 2-wire wiring for HART
Note: For intrinsically safe installations, shield is normally
terminated at one end only
Conduit entry
without plug
installed
Action
3
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