SOFTWARE CONFIGURATION cont.

25

The Advanced Configuration menu sets many parameters that

are not normally used in the operation of the unit. The

Advanced Configuration menu can be accessed from the run

mode by pressing ENT and

or

until the display shows:

The entire Advanced Configuration menu is shown below,

followed by the configuration instructions for each item.

Adv Config

to select

Advanced Configuration Menu

Menu Display

Menu Item Explanation

Adv Config

Enters the Advanced Configuration menu. Press ENT.

to select

Calibrate

Used to adjust for the speed of sound if the ultrasonic signal is going through media other than air.

xxxx units

NOTE: It is strongly recommended to consult the factory prior to using this feature!

Gain Limit

Used to limit the gain to a value between 0 and 32. Since the unit adapts its gain to suit the application, it is not

32

recommended to use this feature unless instructed to by the factory.

Starting Gain

Used to adjust the starting gain to a value between 0 and 32. Since the unit adapts its gain to suit the application,

0

it is not recommended to use this feature unless instructed to by the factory.

Damping (1-60)

Used to set the damping (1-60 seconds) for the unit. This value can be changed depending on how turbulent the

6

process is, or if the rate of fill is very fast or slow.

Echo Loss Delay

Used to set a delay (1-150 seconds) of the Fault Alarm (relay #1) when an echo loss occurs.

1 sec

Default Display

Allows the default display to be changed from Level to Loop (4-20 mA), or Volume or Flow if in the Volume or

Level

Flow mode.

Change Password

The factory preset password is 300. This screen is used to change the password for security purposes.

to select

Adjust Loop Pts

Offsets to the mA current loop can be made.

to select

Enter Tag Line

Used to replace the “Magnetrol Int’l” tag with a user-defined tag such as vessel number or location. Any

to select

alphanumeric characters can be entered as a tag.

Previous Menu

Reverts back to the beginning of Advanced Configuration.

to select

Calibrate

NOTE:

It is not recommended to use the calibrate feature

unless specifically directed to do so from the factory.

The Model 300/301 performs level measurement by timing

how long it takes for a round trip ultrasonic pulse to travel

from the face of the transducer to the liquid surface and

back. The measurement assumes that this round trip is in air

where the speed of sound is 1128 feet/second. This speed of

sound is altered when going through gases other than air.

The Calibrate mode can be used to adjust for the speed of

sound when going through homogenous (not stratified lay-

ers) gases other than air. However, since most gases exist as

stratified layers of vapors above the liquid surface, the

Calibrate mode is rarely used.

When entering the Calibrate mode, the display will indicate

the distance that the 300/301 has measured from the face of

the transducer to the liquid surface. If this distance is in error,

measure the actual distance and enter this value.

NOTE: Using the Calibrate mode may cause false level read-

ings. Consult factory for reset procedures.

Gain Limit

This displays the value of maximum gain that the unit will use.

This value is from 0-32 and the unit steps up in single-gain

increments until a suitable signal is received. Limiting the gain

to a lower value may help with secondary echo problems.

Enter a value between 0 and 32. Enter Password will be dis-

played and your chosen password must be entered at this

time. Press ENT to acknowledge the password.

Gain Limit cont.

The Model 300/301 adapts its gain to suit the conditions of

the application. There are 32 gain steps. The higher the num-

ber, the higher gain/drive required to detect an acceptable

signal.

Starting Gain

The gain starts out at a value of zero and adjusts itself to a

value (between 0 and 32) such that it can reliably measure

the liquid surface. Approximately once a minute it will reini-

tialize the gain starting from zero to make sure that the unit is

measuring the proper distance. This is particularly helpful in

tall vessels or those applications with turbulent surfaces. A

higher Starting Gain value will decrease the time for the unit

to achieve the proper Gain value. Adjusting the starting gain

should not be done without consulting the factory.

Damping

The factory default value is 6 seconds for damping. This

value can be changed (from 1-60) depending on the rate of

fill (or empty) of the vessel. Larger damping values can be

beneficial if the liquid surface is turbulent due to the vessel

fill, or agitation from a mixer.

Echo Loss Delay

Used to set a delay (1-150 seconds) of the Fault Alarm (relay

#1) when an echo loss occurs. This helps to avoid a fault

alarm if the 300/301 momentarily loses the ultrasonic signal

due to excessive turbulence, foam or other application

parameters.

ADVANCED CONFIGURATION MENU