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PENBERTHY MODEL MGT-362 LEVEL MEASUREMENT TRANSMITTER
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
1.1 System description
The Model MGT-362 level transmitter is
designed to be used in conjunction with a
Multiview™ liquid level meter. It measures the
liquid level in a process vessel by detecting
the position of the float in the Multiview™
communicating chamber. The float's position is
then relayed by the electronics via a 4 to 20 mA
output signal.
Specifically, the Model MGT-362 is a loop
powered level measurement transmitter. As
the magnet located in the float closes a group
of reed switches the divided resistance of the
network changes. The electronics located in the
transmitter monitor this change in resistance
and alter the output current proportionally.
As the float ascends, each reed switch
encountered will provide a higher voltage
output than the previous switch. Therefore,
as the float rises the loop current increases.
2 SPECIFICATIONS/APPROVALS
2.1 Enclosure
Watertight (NEMA 4) and Explosion-proof
(NEMA 7) cast aluminum housing NBR O-ring.
2.2 Transmitter
Input:
11 V DC minimum;
30 V DC maximum
Output:
4 to 20 mA continuous
22 mA maximum (failure
indication)
Resolution:
0.375" (10 mm)
Response time: 30 milliseconds
Operating
temperature:
-40°F to 160°F (-40°C to 71°C)
transmitter
-260°F to 257°F (-162°C to 125°C)
sensing element
2.3 Approvals
CSA certified Exi d
Explosion-proof for:
Division 1,2;
Class I; Groups B, C, D;
Class II; Groups E, F, G;
Class III, Type 4
When installed in accordance with control
drawing 18F51-009 (Figure 4)
CSA certified Exi a
Intrinsically safe for:
Division 1,2;
Class I; Groups A, B, C, D;
Class II; Groups E, F, G;
Class III, Type 4
When installed in accordance with control
drawings:
• For transmitter - 18F52-009 (Figure 5)
• For Model MGT-362R sensor - 18J54-009
(Figure 6)
3 INSTALLATION
3.1 Unpacking
Upon receiving the Model MGT-362 level
transmitter, check all components carefully
for damage incurred in shipping. If damage
is evident or suspected, do not attempt
installation.
Notify the carrier immediately and request a
damage inspection. Check each item against
the packing list.
3.2 Mounting the transmitter (for side
connected Multiview™)
1. Measure the distance from the top of the
indicator on the magnetic level meter to the
top of the communicating chamber. Record
this distance. If the mounting clamp does
not clear the indicator:
2. Loosen the clamps holding the indicator
to the communicating chamber. The
clamps that will be used to mount the
Model MGT-362 must pass between the
indicator housing and the communicating
chamber.
3. Mount the Model MGT-362 so the top of
the sensor cap is below the bottom side
connection and the bottom of the seal-off
is above the upper side connection. For
optimal installation, make the distance
between your reference points on the
Model MGT-362 sensor and the side
connections the same. Use the clamps
supplied to secure the sensor to the
communicating chamber. The upper clamp
should be above the upper side connection
and the lower clamp should be below the
bottom side connection. Never clamp
directly on the sensing tube. If the indicator
clamps were loosened:
4. Adjust the position of the indicator so that
the distance from the top of the housing to
the top of the communicating chamber is
the same as in Step 1. Tighten the clamps
for the indicator.
FIGURE 1
MGT-362 Standard Mounting Orientation
2
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