Robertshaw 5318B User manual

INSTRUCTION MANUAL
Level Tek II
Model 5318B
Robertshaw Industrial Products
1602 Mustang Drive
Maryville, TN 37801-3766
Telephone: [phone] Fax: [phone]
http://www.robertshawindustrial.com
909GF295
Revision D
20 July 2007

MODEL 5318B INSTRUCTION MANUAL
Level Tek II, Capacitance Level Switch 909GF295
Page i
RECORD OF CHANGES
Revision
Design
Engineer’s
Approval
Engineering
Manager’s
Approval
Approval
Date COS Number Brief Description
C P. Kronau B. Evans 4/20/07 96435
Corrected various typing
errors.
D P. Kronau B. Evans 13AUG07 96469 Revised to include setpoint “tweaking” and new
variants.

MODEL 5318B INSTRUCTION MANUAL
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Table of Contents
SECTION I – DESCRIPTION...................................................................................................1
1.1 GENERAL...................................................................................................................1
1.2 MODEL IDENTIFICATION..........................................................................................1
SECTION II – SPECIFICATIONS............................................................................................2
2.1 ENVIRONMENTAL.....................................................................................................2
2.2 PERFORMANCE ........................................................................................................2
2.3 ELECTRICAL..............................................................................................................2
2.4 ENCLOSURE..............................................................................................................2
2.5 APPROVALS..............................................................................................................2
SECTION III – INSTALLATION...............................................................................................3
3.1 GENERAL...................................................................................................................3
3.2 PROBE MOUNTING...................................................................................................3
3.2.1 HORIZONTAL MOUNTING .....................................................................................3
3.2.2 VERTICAL MOUNTING...........................................................................................3
3.3 INSTRUMENT MOUNTING ........................................................................................4
3.3.1 PROBE MOUNTED .................................................................................................4
3.3.2 REMOTE MOUNTED...............................................................................................4
3.4 ELECTRICAL CONNECTION ....................................................................................5
SECTION IV -- OPERATION
4.1 GENERAL...................................................................................................................6
4.2 DISPLAYS AND INDICATORS ..................................................................................6
4.2.1 LED INDICATORS...................................................................................................6
4.2.2 LCD DISPLAY .........................................................................................................6
4.3 SWITCHES .................................................................................................................6
4.4 SETUP ........................................................................................................................6
4.4.1 DETERMINING THE MEASUREMENT RANGE.....................................................7
4.4.2 CHOOSING THE DISPLAY FORMAT.....................................................................7
4.4.3 ADJUSTING THE SETUP VALUES........................................................................8
4.4.3.1 ACCESSING THE SETUP VALUES ....................................................................8

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4.4.3.1.1 SELECTING THE DISPLAY FORMAT..............................................................8
4.4.3.1.2 SELECTING THE SAMPLING RATE................................................................9
4.4.3.1.3 FAIL-SAFE MODE SELECTION .......................................................................9
4.4.3.1.4 TIME DELAYS .................................................................................................10
4.4.3.1.4.1 TIME DELAY ON ALARM ............................................................................10
4.4.3.1.4.2 TIME DELAY ON ALARM CLEAR...............................................................10
4.5 PERFORMING INSTRUMENT CALIBRATION........................................................11
4.5.1 ADJUSTABLE DIFFERENTIAL ............................................................................11
4.5.2 ALARM + + AND ALARM + ..................................................................................12
4.5.3 ALARM - - AND ALARM -.....................................................................................13
4.5.4 CONTROL..............................................................................................................14
4.6 SETPOINT ADJUSTMENTS (TWEAKING) .............................................................14
4.6.1 SELECTING THE SETPOINT TO BE ADJUSTED ...............................................14
4.6.2 ADJUSTING THE SETPOINT ...............................................................................15
4.6.3 RETURNING TO THE NORMAL DISPLAY MODE...............................................15
4.7 RECOVERING THE FACTORY DEFAULT SETTINGS...........................................15
SECTION V – TROUBLE SHOOTING..........................................................................18
5.1 STATUS LED............................................................................................................18
5.2 ERROR CODES........................................................................................................18
5.2.1 ERROR 01 – Reserved .........................................................................................18
5.2.2 ERROR 02 – Measurement Too High..................................................................18
5.2.3 ERROR 03 – Measurement Too Low ..................................................................18
5.2.4 ERROR 04 – Low Setpoint Too Close or Reversed...........................................18
5.2.5 ERROR 05 – High Setpoint Too Close or Reversed..........................................18
SECTION VI – SPARE PARTS ....................................................................................19
SECTION VII – ACCESSORIES...................................................................................20

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List of Figures
Figure 3-1 Horizontally Mounted Instrument .........................................................................3
Figure 3-2 Vertically Mounted Instrument..............................................................................3
Figure 3-3 Probe Mounting......................................................................................................4
Figure 3-4 Remote Mounting...................................................................................................4
Figure 3-5 Electrical Connections...........................................................................................5
Figure 4-1 User Controls..........................................................................................................6
Figure 4-2 Menu Tree .............................................................................................................17
Figure A-1 Installation Drawing .............................................................................................21

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MODEL 5318B INSTRUCTION MANUAL
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SECTION I - DESCRIPTION
1.1 GENERAL
The Robertshaw Model 5318B Level-Tek is a
RF capacitance point (On/Off) level switch that
employs all solid state electronics for detecting
predetermined product level changes in tanks,
sumps, silos and other vessels or containers.
The Model 5318B is capable of detecting a
variety of products, including liquids, powders,
granular, lump and flake materials. The
product can be conductive or non-conductive,
depending on the probe selection. Probes are
sold separately.
The Model 5318B is self-contained and uses
microprocessor based digital circuits to ensure
long-term stability, reliability and reduced
maintenance. Control signals are provided
through the contacts of a DPDT relay. The
instrument features adjustable time-delays that
are individually adjustable for the "Alarm" and
"Return-to-Normal" changes in state. There
are both fixed and adjustable differential
settings. The unit is available for either AC or
DC supply voltages.
The Model 5318B allows for three (3) different
control ranges: 250 pF, 500 pF and 1,000 pF.
Setup and calibration can be done in either the
raw measurement mode, or in the converted
mode. The converted mode uses a
measurement that is directly proportional to the
sensed capacitance. Calibration is
accomplished using an integral LCD display
and four (4) pushbuttons.
1.2 MODEL IDENTIFICATION
Identify instrument models in accordance with
the description and variations listed in each table
below. Dashes are used in the model number
only in those spaces as indicated in the example
below:
Key Model Number
Table 1 - Supply Power
Table 2 - Options
Table 3 - Enclosure
5318B B1 A
Key Model Number
Designation Description
5318B Capacitance actuated On-Off Level
Control. DPDT relay, fixed and
adjustable differential (dead-band)
and adjustable time delays.
Explosion-proof, weather tight
enclosure. Unit can be either
probe, or remote, mounted. Probe
not included.
Table 1 – Supply Power
Designation Description
A 18-36 VDC
*B 100-240 VAC, 50/60Hz
C 9-18 VDC
Table 2 - Options
Designation Description
*1 Standard
2 Special, Lower Measurement
Frequency (Consult Factory)
3 Custom Calibration (Consult
Factory)
Table 3 - Enclosure
Designation Description
*A ½” NPT Probe Hub, Type 4, Nitro
Blue
B ¾” NPT Probe Hub, Type 4, Nitro
Blue
D ½” NPT Probe Hub, Type 4X, Gray
Epoxy
E ¾” NPT Probe Hub, Type 4X, Gray
Epoxy
* Denotes standard configuration.

MODEL 5318B INSTRUCTION MANUAL
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SECTION II – SPECIFICATIONS
2.1 ENVIRONMENTAL
Storage Temperature Limits....... -55ºF to +225ºF
(-48ºC to +107ºC)
Operating Temperature Limits... -40ºF to +160ºF
(-40ºC to +70ºC)
Vibration Limits.............................2 g’s to 100 Hz
Operating Humidity Limits............... 0 to 95% RH
(non-condensing)
Weight..........................................3.5 lbs (1.6 kg)
Shipping Weight..............................5 lbs (2.3 kg)
2.2 PERFORMANCE
Temperature Coefficient.......................0.01pF/ºC
Control Point
Time Delay:
On ALARM........ Adjustable, 0 to 60 seconds
On Return.........Adjustable, 0 to 60 seconds
Control Range............................User Selectable
250, 500, 1,000 pF max
Differential (dead-band):
ON/OFF (Adjustable).......................0.2 pF to
100% of Control Range
ALARM + + (fixed)...............................1.0 pF
ALARM + (fixed)..................................0.2 pF
ALARM - (fixed)...................................0.2 pF
ALARM - - (fixed).................................1.0 pF
CONTROL (fixed)................................0.2 pF
2.3 ELECTRICAL
Supply Voltage:
Standard..............100 to 240 VAC, 50/60 Hz
Optional.....................................18 - 36 VDC
........................................9 - 18 VDC
Supply Power.................5 watts, 5 VA maximum
Control Relay:
Contacts ...............................DPDT (Form C)
Rating................................... 5 A @ 28 VDC;
5 A @ 120/240 VAC, non-inductive
2.4 ENCLOSURE
Standard ............Explosion proof, cast aluminum
painted with blue polyurethane enamel.
Suitable for Class I, Division 1, Groups C & D,
Class II, Division 1, Groups E, F, & G
hazardous areas
Dust tight CSA Enclosure 5.
Meets Enclosure 4.
Optional.......................... Same as above, except
painted with gray epoxy enamel.
Also meets Enclosure 4X
2.5 cETLus APPROVALS
UL..................................Standard 61010-1
CAN/CSA....................C22.1 NO. 61010-1
RoHS
Compliance........EU Directive 2002/95/EC

MODEL 5318B INSTRUCTION MANUAL
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SECTION III – INSTALLATION
3.1GENERAL
Examine the instrument for possible shipping
damages.
IMPORTANT: If for any reason it is determined
that parts should be returned to the factory,
please notify the nearest Robertshaw Industrial
Products sales representative prior to shipment.
Each unit must be properly packed to prevent
damage. Robertshaw assumes no responsibility
for equipment damage in shipment due to
improper packaging.
Choose a location in accordance with good
instrument practice, avoiding extremes of
temperature, humidity, and vibration. (See
“Specifications”, Section II)
3.2 PROBE MOUNTING
Robertshaw probes are purchased separately
from the instruments and are available in a
variety of sizes and types with numerous options
for the materials and construction. Each probe
should be selected for the specific application in
order to insure the best and most reliable
operation of the system.
Probes are available with, or without insulation.
Insulated probes may be used for liquid, solid or
interface detection and can also be used on
conductive materials. Bare probes are normally
used on non-conductive materials only.
Standard type probes are installed so that the
face of the packing gland is flush (or nearly so)
with the vessel wall. When installing a probe in
a nozzle, recess or open end well, a sheathed
probe should be used, with the sheath length
equal to the nozzle, recess, or well length. This
insures that the “active” portion of the probe is
extended into the process area and eliminates
potential problems due to build-up in the nozzle,
recess, or well.
CAUTION: When installing an insulated probe,
care should be taken not to accidental puncture
the probe insulation.
3.2.1 HORIZONTAL MOUNTING
Horizontally mounted rod-type probes must be
installed in vessels at the desired point of level
detection. Horizontally mounted probes provide
the closest control (smallest deadband) in that a
small change at, or near, the probe will produce
a large capacitance change.
On applications involving viscous liquids, or
materials, that have a tendency to “cling” or
“build-up”, it is recommended that the probe be
mounted on a slight downward angle to permit
draining of the material from the probe.
Figure 3-1 Horizontally Mounted Instrument
3.2.2 VERTICAL MOUNTING
Vertically mounted rod-type probes should be
installed in either the top or bottom of the vessel
with the midpoint on the probe corresponding to
approximately the desired level detection point.
Vertically installed probes allow a variation in the
level detection point up and down the length of
the probe by means of the instrument
calibration.
Figure 3-1 Vertically Mounted Instrument

MODEL 5318B INSTRUCTION MANUAL
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3.3 INSTRUMENT MOUNTING
3.3.1 PROBE MOUNTED
The Model 5318B Level Tek II is designed to be
mounted directly on the installed probe
assembly as shown in Figure 3-1 and may be
mounted or oriented in any position.
Prior to installing the instrument onto the probe,
the probe electrical connection pin (included with
the instrument) must be installed in the end of
the probe as shown in Figure 3.1 to provide the
electrical connection between the probe and the
instrument. Do not over tighten the probe pin.
Figure 3-3 Probe Mounting
3.3.2 REMOTE MOUNTED
The Model 5318B Level Tek II may also be
remotely mounted from the probe using a
remote mount cable assembly (sold separately,
see SECTION VII -- ACCESSORIES). This
cable assembly allows the instrument to be
mounted up to 15 feet from the probe. For
longer distances consult the factory. Figure 3-2
shows the details of this mounting option.
Figure 3-4 Remote Mounting

MODEL 5318B INSTRUCTION MANUAL
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3.4 ELECTRICAL CONNECTIONS
The instrument chassis may be removed from
the housing for wiring installation by loosening
the three (3) captive mounting screws and
withdrawing the chassis straight out. In re-
installing the chassis assembly, make certain
that the probe connection pin is engaged in the
chassis receptacle.
All electrical connections should be made in
accordance with Figure 3.3 and any applicable
national, state and/or local codes. See
Specifications (Section II) for control relay
contact ratings.
Table 3.1
Electrical Connections
TB101 – Supply Power
GND Earth Ground
NEU (-) AC Neutral/
DC Negative
HOT (+) AC Hot/
DC Positive
Table 3.2
Electrical Connection
TB102 – Relay Contacts
NC1 Normally Closed #1
COMM1 Common #1
NO1 Normally Open #1
NO2 Normally Open #2
COMM2 Common #2
NC2 Normally Closed #2
GND
NEU (-)
HOT (+)
N02
NO1
COMM2
NC2
COMM1
NC1
NOTE: CONTROL RELAY CONTACT
DESIGNATIONS ARE SHOWN WITH
THE RELAY IN THE DE-ENERGIZED
CONDITION. THE RELAY IS
NORMALLY ENERGIZED AND
BECOMES DE-ENERGIZED WHEN
AN ALARM CONDITION IS
DETECTED.
Figure 3-5 Electrical Connections
NOTE – Refer to drawing number
909HB918, Certified Print, Installation
Drawing, Model 5318B for complete
installation and wiring requirements.

MODEL 5318B INSTRUCTION MANUAL
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SECTION IV – OPERATION
4.1 GENERAL
All controls and indicators are located on the
Measurement PCA. These controls and
indicators are accessible by removing the cover
of the Model 5318B.
CAUTION: UTILIZATION OF THESE
CONTROLS REQUIRES THE REMOVAL OF
THE COVER. REMOVING THE COVER
VIOLATES THE EXPLOSION-PROOF RATING
OF THE ENCLOSURE
4.2 DISPLAYS AND INDICATORS
Figure 4-1 User Controls
4.2.1 LED INDICATORS
There are two (2) LED indicators located above
the LCD display on the Measurement PCA. The
left hand LED (DS203) indicates the health of
the Model 5318B. It flashes at a rate of
approximately once every two seconds.
The other LED (DS202) indicates the current
state of the instrument. It is illuminated when
the Model 5318B is in the ALARM condition,
relay de-energized.
4.2.2 LCD DISPLAY
A 2-line by 8-character liquid crystal display,
LCD, (DS201) is provided to aid in the setup and
calibration of the Model 5318B. In normal
operations the top line displays the current
status and the bottom line displays the current
input.
4.3 SWITCHES
There are four (4) navigation pushbutton
switches located immediately below the LCD
display. These switches are identified as
follows:
• LEFT [LT] (S203)
• UP [UP] (S202)
• DOWN [DN] (S205)
• RIGHT [RT] (S204).
The function of these switches varies as the
user navigates through the menus.
4.4 SETUP
The initial step in putting the Model 5318B into
operation is to determine the proper
configuration of the instrument. The unit is
shipped from the factory with the following
default setup values:
Table 4-1 Default Setup Values
Variable Standard Low Freq Custom
High Setpoint 11400 1065 26250
Low Setpoint 14400 1490 26250
Setpoint
Mode Adj. Diff Adj. Diff. Control
Failsafe
Mode HLFS HLFS LLFS
Alarm Delay 5 5 0
Return Delay 3 3 0
Display Mode RAW RAW RAW
Update Rate 4/sec. 4/sec. 4/sec.

MODEL 5318B INSTRUCTION MANUAL
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4.4.1 DETERMINING THE CONTROL
RANGE
The first item that must be selected is the control
range. The Model 5318B offers three (3) control
ranges, but the default value should be sufficient
for most typical, horizontally mounted probe,
installations.
Applications involving vertically mounted probes
may require use of one of the other ranges. The
signal range is a function of the probe and the
media being sensed. The setpoint(s) must fall
within the control range selected.
The control range is determined by selecting the
appropriate update rate. The relationship
between the control range and update range is
as follows:
20* – 250 pF......................4/second
20* – 500 pF......................2/second
125* – 1,000 pF.................1/second
* These values are 30 pF for the low
frequency version.
EXAMPLE #1:
Consider a vertically mounted Model 740A-
B048-N0 probe, 48 inches long used in a
conductive liquid. This probe has a gland
capacitance of 24 pF and the pF/Ft in air is
4.5.
Assuming that the material being sensed
has a dielectric constant of 60 the pF/Ft of
the length submerged in the material is 53.
With the product level below the end of the
probe the capacitance input to the Model
5318B will be:
A) Gland...........................24 pF
B) Probe (4 x 4.5).............18 pF
C) Total ............................42 pF
With all but 6 inches of the probe
submerged in the material the capacitance
input to the Model 5318B will be:
A) Gland..................... 24.00 pF
B) Probe; In Air
(0.5 x 4.5).................2.25 pF
C) Probe; Immersed
(3.5 x 53)............. 185.50 pF
D) Total .................... 211.75 pF
These calculations show that the input
capacitance for this application will be 42 to
212 pF and the default sampling rate of
4/second (0-250 pF) will be acceptable.
EXAMPLE #2:
Consider a vertically mounted Model 740A-
B120-N0 probe, 12 feet long used in water.
This probe has a gland capacitance of 24 pF
and the pF/Ft in air is 4.5.
Using a dielectric constant of 80 the pF/Ft of
the length submerged in the material is 56.
With the product level below the end of the
probe the capacitance input to the Model
5318B will be:
A) Gland...........................24 pF
B) Probe (12 x 4.5) ..........54 pF
C) Total............................78 pF
With all but 1 foot of the probe submerged in
the water the capacitance input to the Model
5318B will be:
A) Gland......................24.00 pF
B) Probe; Air
(1 x 4.5)...................4.50 pF
C) Probe; Immersed
(11.5 x 56)...........644.00 pF
D) Total.....................672.50 pF
These calculations show that the
capacitance input for this application will be
78 to 673 pF and the sampling rate of
1/second would be required.
4.4.2 CHOOSING THE DISPLAY
FORMAT
During normal operation the results of the
previous input conversion, measurement, are
displayed on the right hand side of the bottom
line of the LCD display. The user has the option
of displaying this value either as the actual,
RAW, measurement or as a converted,
CNVRTD, value.
The actual measurement (RAW) is a non-linear
function and the converted (CNVRTD) value is
linear. Regardless of the display format
selected the Model 5318 operates internally
using the actual measurement value.

MODEL 5318B INSTRUCTION MANUAL
Level Tek II, Capacitance Level Switch 909GF295
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If the converted format is selected the change in
displayed value is proportional to the sensed
capacitance.
For Options 1 & 3 a sampling rate of 4/second
the display will change ~50 units/1 pF change in
the input capacitance. This gives a resolution of
~0.02 pF/unit. For the 2/second sampling rate
the change in the display will be ~25 units/pF
change or ~0.04 pF/unit. Lastly at the 1/second
sampling rate the display change will be ~12.5
units/pF or 0.08 pF/unit.
For Option 2 a sampling rate of 4/second the
display will change ~100 units/1 pF change in
the input capacitance. This gives a resolution of
~0.01 pF/unit. For the 2/second sampling rate
the change will be change in the display will be
~50 units/1 pF change or ~0.02 pF/unit. Lastly
at the 1/second sampling rate the display
change will be ~25 units/1 pF or ~0.04 pF/unit.
The selection of the display format is up to the
user’s preference and does not affect the
operation of the instrument. It should be noted
that setpoint values will be displayed in the
same format as the measurement.
4.4.3 ADJUSTING THE SETUP VALUES
Once the sampling rate and display format has
been determined the next step will be to adjust
the instruments setup values. These values are
accessible using the navigation switches located
just below the LCD display.
CAUTION: UTILIZATION OF THESE
CONTROLS REQUIRES THE REMOVABLE OF
THE COVER. REMOVING THE COVER
VIOLATES THE EXPLOSION-PROOF RATING
OF THE ENCLOSURE
4.4.3.1. ACCESSING THE SETUP
VALUES
To access the setup values press the [DN]
pushbutton once followed by pressing the [RT]
pushbutton once. The display should now show:
High SP
XXXXX
Where “XXXXX” represents the currently set
High Setpoint value. It should be noted that this
value is the result of calibrating the instrument.
This value can be changed, or tweaked, here.
Adjusting the setpoint(s) is discussed later in this
section.
4.4.3.1.1. SELECTING THE DISPLAY
FORMAT
Pressing the [DN] pushbutton six (6) more times
will bring the access to the display format
variable. The LCD display will initially show:
Display
YYYYY
Where “YYYYY” represents the currently
selected display format. After a short time the
top line of the display will begin scrolling the
message:
“Select RAW measured frequency or
CONVERTED value proportional to
level”
Pressing the [RT] pushbutton once will select
this value for changing and the LCD will initially
show:
Display
Press
RT
After a short time the bottom line of the display
will begin scrolling the message:
“Press RT to change mode of displayed
measurement”
Pressing the [RT] pushbutton once will open the
value for change and the LCD will initially show:
Display
RAW
After a short time the top line of the display will
begin to scroll the message:
“Select RAW measured frequency or
CONVERTED value proportional to
level”
The [UP] and [DN] pushbuttons can be used to
scroll between the two possible value. The
currently selected format is identified by an “*”
appended to the end of the format. When the
desired format is displayed press the [RT]
pushbutton to select that format. The display
will return to the previous level of the Setup
menu.

MODEL 5318B INSTRUCTION MANUAL
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4.4.3.1.2. SELECTING THE SAMPLING
RATE
Changing the sampling rate can be accessed by
pressing the [DN] pushbutton once from the
“Display” variable. The display will initially show:
Sampling
X/sec
Where “X” represents the currently selected
number of updates per second. After a short
time the top line of the display will begin to scroll
the message:
“Use lower sampling rate only for high
capacitance probes”
Pressing the [RT] pushbutton once will select
the value and the LCD will initially show:
Sampling
Press
RT
After a short time the bottom line of the display
will begin scrolling the message:
“Press RT to change sampling rate”
Pressing the [RT] pushbutton once will open the
value for change and the LCD will initially show:
Sampling
X/sec*
The [UP] and [DN] pushbuttons can be used to
scroll among the three possible values. The
current sampling rate is identified by an “*”
appended to the end of the format. When the
desired sampling rate is displayed press the
[RT] pushbutton to select that rate. The display
will return to the previous level of the Setup
menu.
4.4.3.1.3. FAIL-SAFE MODE SELECTION
Once the sampling rate and display mode have
been set the next logical item to be set is the
Fail-Safe Mode. The Model 5318B provides two
fail-safe modes; high level (HLFS) and low level
(LLFS).
HLFS is the mode in which the “Alarm” condition
exists when the sensed level is above the High
Setpoint. The alarm then clears, returns to
normal, when the level falls bellow the Low
Setpoint.
Conversely, LLFS is the mode in which the
“Alarm” condition exists when the sensed level is
below the Low Setpoint. The alarm then clears
when the level rises above the high Setpoint.
To select the required fail-safe mode enter the
Setup Menu, from the normal operating mode by
pressing the [DN] pushbutton, followed be
pressing the [RT] pushbutton. This action will
bring you to the first item in the Setup Menu,
High SP.
Pressing the [DN] pushbutton three (3) times will
bring you to the ‘Alarm ON” variable. The
display will initially show:
Alarm ON
XXXX
Where XXXX represents the currently selected
fail-safe mode. After a short time the top line of
the display will begin to scroll the following
message:
“Enables alarm – above HIGH setpoint
or below LOW setpoint”
Pressing the [RT] pushbutton once will select
the value and the LCD will initially show:
Alarm ON
Press
RT
After a short time the bottom line of the display
will begin scrolling the message:
“Press RT to change Alarm setpoint”
Pressing the [RT] pushbutton once will open the
value for change and the LCD will initially show:
Alarm ON
XXXX*
Where XXXX represents the currently selected
fail-safe mode. After a short time the top line of
the display will begin to scroll the following
message:
“Enables alarm – above HIGH setpoint
or below LOW setpoint”
The [UP] and [DN] pushbuttons can be used to
scroll among the two possible values. The
current fail-safe mode is identified by an “*”
appended to the end of the format. When the
desired fail-safe mode is displayed press the
[RT] pushbutton to select that rate. The display
will return to the previous level of the Setup
menu.

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4.4.3.1.4. TIME DELAYS
Refer to the Figure 4 - 2 to see the organization
of the Setup Menu. There are two (2) more
variables that can be adjusted from the Setup
Menu. These are the AlarmDly and Ret. Dly,
which are the time delays associated with the
detecting of an alarm and the clearing of an
alarm.
These delays specify the time between the
detection of a change in the alarm state and the
operating of the relay. When an alarm is
detected the time delay will be the time that the
alarm condition must exist before the relay is de-
activated. When a return-to-normal condition is
detected the time delay will be the time the
condition must exist before the relay is activated.
The delays can be turned “off” by setting the
delay to “00” and the active delay times are 1 to
60 seconds. This allows either or both delays to
be turned “Off” and the delay times to be
adjusted independently.
4.4.3.1.4.1. TIME DELAY ON ALARM
To select the required time delay enter the
Setup Menu, from the normal operating mode by
pressing the [DN] pushbutton, followed be
pressing the [RT] pushbutton. This action will
bring you to the first item in the Setup Menu,
High SP.
Pressing the [DN] pushbutton four (4) times will
bring you to the “AlarmDly” variable. The
display will initially show:
AlarmDly
XX
Where XX represents the currently set time
delay. After a short time the top line of the
display will begin scrolling the message:
“Relay delay when alarm goes ON
[seconds]”
Pressing the [RT] pushbutton once will select
the variable. The display will initially show:
AlarmDly
Press RT
Pressing the [RT] pushbutton will open the
variable for change. After a short time the
bottom line of the display will begin to scroll the
message:
“Press RT to change Alarm delay”
Pressing the [RT] pushbutton will allow the time
delay to be changed. The display will initially
show:
AlarmDly
XX*
Where XX* represents the current time delay
setting. After a short time the top line of the
display will begin scrolling the message:
“Relay delay when alarm goes ON
[seconds]”
The [UP] and [DN] pushbuttons can be used to
scroll among the possible values. The current
time delay is identified by an “*” appended to the
end of the format. When the desired time delay
value is displayed press the [RT] pushbutton to
select that value. The display will return to the
previous level of the Setup menu.
4.4.3.1.4.2. TIME DELAY ON ALARM
CLEAR
To select the required time delay enter the
Setup Menu, from the normal operating mode by
pressing the [DN] pushbutton, followed be
pressing the [RT] pushbutton. This action will
bring you to the first item in the Setup Menu,
High SP.
Pressing the [DN] pushbutton five (5) times will
bring you to the “Ret. Dly” variable. The display
will initially show:
Ret. Dly
XX
Where XX represents the currently set time
delay. After a short time the top line of the
display will begin scrolling the message:
“Relay delay when alarm goes OFF
[seconds]”
Pressing the [RT] pushbutton once will select
the variable. The display will initially show:
Ret. Dly
Press RT
Pressing the [RT] pushbutton will open the
variable for change. After a short time the
bottom line of the display will begin to scroll the
message:
“Press RT to change return delay”

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Pressing the [RT] pushbutton will allow the time
delay to be changed. The display will initially
show:
AlarmDly
XX*
Where XX* represents the current time delay
setting. After a short time the top line of the
display will begin scrolling the message:
“Relay delay when alarm goes OFF
[seconds]”
The [UP] and [DN] pushbuttons can be used to
scroll among the possible values. The current
time delay is identified by an “*” appended to the
end of the format. When the desired time delay
value is displayed press the [RT] pushbutton to
select that value. The display will return to the
previous level of the Setup menu.
4.5. Performing Instrument
Calibration
Once the instrument has been setup the next
step is calibrate the instrument to the
vessel/process. The Model 5318B provides for
several calibration procedures. Some of the
procedures require varying the level in the
vessel, while others do not. These calibration
procedures are as follows:
• Adjustable Differential – this
procedure is typically used when the
level difference or deadband between
the high and low setpoints on vertically
mounted probe is desired. Typically
used for applications involving motor or
pump control.
• Alarm + + – Used to provide single
point control. This procedure allows
high setpoint calibration when the
current level is below the desired
setpoint. This procedure is typically
used with high dielectric materials and a
horizontally mounted probe.
• Alarm +– Same as the procedure
above except for use with a low
dielectric material.
• Alarm -– Used to provide single point
control. This procedure allows low
setpoint calibration when the current
level is above the desired setpoint. This
procedure is typically used with low
dielectric materials and a horizontally
mounted probe.
• Alarm - - – Same as the procedure
above except for use with a High
dielectric material.
• Control – Used to set a single setpoint
on a probe. This procedure is typically
used with a vertically mounted probe.
All of these procedures involve a fixed
differential, except Adjustable Differential.
Once the applicable calibration procedure has
been selected the calibration is performed using
the appropriate description below.
4.5.1. ADJUSTABLE DIFFERENTIAL
This procedure requires physically varying the
level in the vessel. This procedure is begun with
the level in the vessel at any level.
CAUTION: UTILIZATION OF THESE
CONTROLS REQUIRES THE REMOVAL OF
THE COVER. REMOVING THE COVER
VIOLATES THE EXPLOSION-PROOF RATING
OF THE ENCLOSURE
To access this calibration procedure you must
first be sure that the instrument’s LCD display is
in the normal mode. This can be confirmed by
pressing the [LT] pushbutton until the normal
display is reached.
To reach the Calibration menu first press the
[DN] pushbutton twice, followed by pressing the
[RT] pushbutton once. The display will now
show:
Step 1 RT
The bottom line will be scrolling the following
message:
“Select method of setpoint calibration”

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Press the [RT] pushbutton once to enter the
methods submenu. The display will now show:
Exit
The bottom line will be scrolling the following
message:
“Scroll down to select mode, then press
RT to enter or LT to exit”
Pressing the [DN] pushbutton once will access
the desired procedure and the display will show:
AdjDiff
If this is the last procedure used to calibrate the
instrument, there will be an “*” at the end of the
top line. The bottom line will be scrolling the
message:
“Calibrate high and low setpoints
separately”
Press the [RT] pushbutton to begin the
procedure. The display will show:
First Sp
High RT
After a short period of time the top line of the
display will scroll the following message:
“Select setpoint for first measurement”
Using the [UP] and [DN] pushbuttons, scroll
between the two (2) possible setpoints. When
the desired setpoint is displayed press the [RT]
pushbutton. If the high setpoint is selected the
display will show:
High SP
XXXXX
“XXXXX” represents the current measurement.
After a short period of time the top line of the
display will begin scrolling the message:
“Fill tank to HIGH setpoint, then press
RT”
With the level is at the desired setpoint press
[RT] to enter the save setpoint mode. The
display will show:
Save Sp-?
YES RT
Press the [RT] pushbutton to store the value or
the [LT] to abort.
After the [RT] pushbutton is pressed the display
will show:
Low SP
XXXXX
“XXXXX” represents the current measurement.
After a short period of time the top line of the
display will begin scrolling the message:
“Fill tank to LOW setpoint, then press
RT”
With the level is at the desired setpoint press
[RT] to enter the save setpoint mode. The
display will show:
Save Sp-?
YES RT
Press the [RT] pushbutton to store the value or
the [LT] to abort.
When the value has been successfully stored
the display will return to the normal mode.
4.5.2. ALARM + + AND ALARM +
These two modes are typically used with the
level in the vessel is below the horizontally
mounted probe. These procedures take the
current measured level and subtract a
predetermined offset to determine the setpoint.
The same value is stored into both setpoints.
This procedure is entered from the normal mode
by depressing the [DN] pushbutton twice,
followed by pressing the [RT] pushbutton once.
The display will show:
Step 1 RT
The bottom line will be scrolling the following
message:
“Select method of setpoint calibration”
Press the [RT] pushbutton once to enter the
methods submenu. The display will now show:
Exit
The bottom line will be scrolling the following
message:
“Scroll down to select mode, then press
RT to enter or LT to exit”

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Pressing the [DN] pushbutton twice accesses
the ALARM++ procedure. The display will show:
Alarm++
XXXXX
– or –
Pressing the [DN] pushbutton three times will
access the Alarm+ procedure. The display will
show:
Alarm+
XXXXX
“XXXXX” represents the current measurement.
After a short period of time the bottom line of the
display will begin scrolling the message:
“Calibrate horizontal probe in air for high
dielectric materials”
– or –
“Calibrate horizontal probe in air for low
dielectric materials”
Pressing the [RT] pushbutton will enter the save
setpoint procedure. The display will show:
High SP
XXXXX
“XXXXX” represents the current measurement.
After a short period of time the top line of the
display will begin scrolling the message:
“Fill tank to HIGH setpoint, then press
RT”
Since the level is already at the desired setpoint
press [RT] to enter the save setpoint mode. The
display will show:
Save Sp-?
YES RT
Press the [RT] pushbutton to store the value or
the [LT] to abort. After pressing the [RT]
pushbutton the setpoint will be stored and the
display will return to the normal mode.
4.5.3. ALARM - - AND ALARM -
These two modes are typically used with the
level in the vessel is above the horizontally
mounted probe. These procedures take the
current measured level and add a
predetermined offset to determine the setpoint.
The same value is stored into both setpoints.
This procedure is entered from the normal mode
by depressing the [DN] pushbutton twice,
followed by pressing the [RT] pushbutton once.
The display will show:
Step 1 RT
The bottom line will be scrolling the following
message:
“Select method of setpoint calibration”
Press the [RT] pushbutton once to enter the
methods submenu. The display will now show:
Exit
The bottom line will be scrolling the following
message:
“Scroll down to select mode, then press
RT to enter or LT to exit”
Pressing the [DN] pushbutton four times
accesses the ALARM - procedure. The display
will show:
Alarm-
XXXXX
– or –
Pressing the [DN] pushbutton five times will
access the Alarm - - procedure. The display will
show:
Alarm - -
XXXXX
“XXXXX” represents the current measurement.
After a short period of time the bottom line of the
display will begin scrolling the message:
“Calibrate submerged horizontal probe
for low dielectric materials”
– or –
“Calibrate submerged horizontal probe
for high dielectric materials”
Pressing the [RT] pushbutton will enter the save
setpoint procedure. The display will show:
Low SP
XXXXX

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“XXXXX” represents the current measurement.
After a short period of time the top line of the
display will begin scrolling the message:
“Fill tank to LOW setpoint, then press
RT”
Since the level is already at the desired setpoint
press [RT] to enter the save setpoint mode. The
display will show:
Save Sp-?
YES RT
Press the [RT] pushbutton to store the value or
the [LT] to abort. After pressing the [RT]
pushbutton the setpoint will be stored and the
display will return to the normal mode.
4.5.4. CONTROL
This mode provides a fixed differential at a
control point determined by the calibrated level.
It is typically used with vertically mounted
probes.
The procedure is entered from the normal mode
by pressing the [DN] pushbutton twice, followed
by the [RT] pushbutton once. The display will
show:
Step 1 RT
The bottom line will be scrolling the following
message:
“Select method of setpoint calibration”
Press the [RT] pushbutton once to enter the
methods submenu. The display will now show:
Exit
The bottom line will be scrolling the following
message:
“Scroll down to select mode, then press
RT to enter or LT to exit”
Pressing the [DN] pushbutton six times will
access the CONTROL procedure. The display
will show:
Control
The bottom line of the display will be scrolling
the message:
“Calibrate vertical probe with fixed
differential”
Pressing the [RT] pushbutton will access the
save setpoint procedure. The display will show:
Set SP
XXXXX
“XXXXX” represents the current measurement.
After a short period of time the top line of the
display will begin scrolling the message:
“Fill tank to setpoint, then press RT”
With the level at the desired setpoint, press the
[RT] pushbutton. The display will show:
Save Sp-?
YES RT
After a short period of time the top line of the
display will begin scrolling the message:
“Do you want to save measured
setpoint?”
Press the [RT] pushbutton to store the value or
the [LT] to abort. After pressing the [RT]
pushbutton the setpoint will be stored and the
display will return to the normal mode.
4.6. SETPOINT ADJUSTMENTS
(TWEAKING)
It is sometimes desirable to make small
adjustments to the setpoint(s) once the Model
5318B is in “normal” operation. Setpoint
“tweaking” enables changing the setpoint by up
to 10%, in 0.1% increments.
4.6.1. SELECTING THE SETPOINT TO BE
ADJUSTED
The setpoints are adjusted from the setup menu.
The adjustment procedure is entered from the
normal mode by pressing the [DN] pushbutton
once, followed by pressing the [RT] pushbutton
once. The display will show:
High SP
XXXXX