3
PENBERTHY
MODEL MGT-362 LEVEL MEASUREMENT TRANSMITTER
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
3.3 Mounting the transmitter (for end
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 bottom
of the seal-off is four inches above the top
of the indicator. Use the clamps supplied
to secure the sensor to the communicating
chamber. 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.
3.4 Installation
1. If you are using conduit for the transmitter
wiring use a conduit seal with a drain or
a drip-loop to prevent condensate from
entering the housing. Condensate can cause
electrical shorts.
The transmitter housing has a ½" NPTF
connection for the wiring conduit.
3.5 Wiring the transmitter (integral mounted
units)
The sensor is pre-wired to the electronics
assembly at the factory. All that is necessary is
to connect your power supply.
1. Connect the positive (+) lead from your loop
power supply to TB2 (+) and the negative
(-) lead to TB2 (-). (See Figure 2)
3.6 Wiring the transmitter (remote mounted
units)
1. Connect the red, green and black sensor
wires to TB1. (See Figure 2)
2. Attach the positive (+) lead from your loop
power supply to TB2 (+) and the negative (-)
lead to TB2 (-). (see Figure 2)
3. The cable connecting the sensor and
transmitter should not exceed 50 feet
in length. Beldon cable #85240 is
recommended for connecting the sensor to
the transmitter.
4 SET-UP
4.1 Calibration
The Model MGT-362 is factory calibrated for
the corresponding Multiview™ unit. However,
if necessary the Model MGT-362 may be bench
calibrated using the float or the calibration
magnet (supplied). The following procedures
require that power be applied to the unit with
the cover removed.
WARNING
'Live' electrical circuits can ignite flammable
gases. Be sure that the unit is properly grounded
and that a suitable intrinsically safe barrier has
been installed between the power supply and this
unit. Failure to use a barrier can result in severe
personal injury or property damage.
1. Turn off power to the unit.
2. Remove the housing cover and check to see
that all wires have been properly installed.
3. Disconnect the positive (+) loop wire from
TB2. Connect this wire to the positive lead
of a millimeter. Connect the negative lead of
your millimeter to TB2 (+). (See Figure 2)
4. Connect the positive (+) lead of a digital
voltmeter to TP1 on the circuit board. Connect
the negative (-) lead of a digital voltmeter to
TP2 on the circuit board. (See Figure 2)
5. Lower the liquid level in the vessel to the
'zero' point. For bench calibration place the
float or calibration magnet on the sensing
element at the zero point.
6. Turn the NULL, SPAN and OFFSET
potentiometers (R16, R15, and R14) fully
counter clockwise. (See Figure 2)
7. Apply power to the unit. The millimeter
should read 4 mA or less. If not, contact the
factory. If the millimeter reads over 20 mA
then the float or calibration magnet may not
be in proximity to the sensor or the sensor
wires are not properly connected at TB1.
Reposition the float or inspect the wiring.
