Magnetrol R82 사용자 설명서
10
2.3
Before You Begin
2.3.1 Site Preparation
Each R82 Radar transmitter is built to match the specific
physical specifications of the required installation. Make
sure the antenna connection is correct for the threaded or
flanged mounting on the vessel or tank where the transmit-
ter will be placed.
physical specifications of the required installation. Make
sure the antenna connection is correct for the threaded or
flanged mounting on the vessel or tank where the transmit-
ter will be placed.
See Mounting, Section 2.4.
Make sure that the wiring between the power supply and
Radar transmitter are complete and correct for the type of
installation.
Radar transmitter are complete and correct for the type of
installation.
When installing the Radar transmitter in a general purpose
or hazardous area, all local, state, and federal regulations and
guidelines must be observed. See Wiring, Section 2.5.
or hazardous area, all local, state, and federal regulations and
guidelines must be observed. See Wiring, Section 2.5.
2.3.2 Equipment and Tools
No special tools are needed. The following items are
recommended:
recommended:
• Threaded antenna and transmitter . . . . . . 2" (50 mm)
• Torque wrench . . . . . . . . . . . . . . . . . . . . . highly desirable
• Flat-blade screwdriver
• Digital multimeter or volt/ammeter . . . . . Optional
• 24 VDC (23 mA) power supply. . . . . . . . Optional
2.3.3 Operational Considerations
Radar applications are characterized by three basic conditions;
Dielectric, Distance (measuring range) and Disturbances
(turbulence, foam, false targets, multiple reflections and rate
of change).
Dielectric, Distance (measuring range) and Disturbances
(turbulence, foam, false targets, multiple reflections and rate
of change).
2.3.3.1 Maximum Distance
The chart below shows the maximum measuring range
(Distance) of each antenna based on fundamental condi-
tions of Dielectric, Distance and Turbulence. Maximum dis-
tance is calculated as Tank Height + Sensor Offset
(see
(Distance) of each antenna based on fundamental condi-
tions of Dielectric, Distance and Turbulence. Maximum dis-
tance is calculated as Tank Height + Sensor Offset
(see
page 17
). It is measured from the Sensor Reference
Point (bottom of NPT thread, top of BSP thread or face of
a flange).
a flange).
2.3.3.2 Minimum Distance
If the liquid level is allowed onto the antenna, noise and
media build-up drastically decrease reliable measurement.
Liquid should not be allowed closer than 15 inches
(380 mm) from the bottom of the antenna mounting
threads (or face of sanitary flange).
media build-up drastically decrease reliable measurement.
Liquid should not be allowed closer than 15 inches
(380 mm) from the bottom of the antenna mounting
threads (or face of sanitary flange).
58-610 Model R82 Radar Transmitter
Dielectric
Turbulence
R82
1.7-3.0
None
26 (8.0)
Light, < 0.5"
21 (6.4)
Moderate, < 1.0"
14 (4.3)
Heavy, > 1.0"
7 (2.1)
3.0-10.0
None
33 (10.1)
Light, < 0.5"
26 (7.9)
Moderate, < 1.0"
19 (5.8)
Heavy, > 1.0"
12 (3.7)
10.0-100
None
40 (12)
Light, < 0.5"
32 (9.8)
Moderate, < 1.0"
24 (7.3)
Heavy, > 1.0"
17 (5.2)
MAXIMUM DISTANCE
feet (meters)