Milltronics MultiRanger Plus Instruction Manual
MULTIRANGER
PLUS
PROGRAMMABLE
LEVEL SYSTEM
Instruction Manual
PL-443
June 1995
33454430
PRR 1.1
Table of Contents
General Information
Important 1 - 1
MultiRanger Plus 1 - 1
Specifications
MultiRanger Plus 2 - 1
Programmer 2 - 2
Transducer 2 - 2
Temperature Sensor 2 - 2
Current Output Isolator 2 - 2
Cabling 2 - 2
Installation
Multiranger Plus 3 - 1
Outline and Mounting 3 - 1
Circuit Board Layout 3 - 2
Interconnection 3 - 3
Installing the Transducer 3 - 3
Selecting Temperature Source 3 - 4
Current Output 3 - 4
Current Output Isolator 3 - 5
Synchronization 3 - 6
Power Connections 3 - 7
Programmer 3 - 8
Start Up
General 4 - 1
Programmer Keypad Run Mode 4 - 2
Legend 4 - 4
Parameter Entry 4 - 4
Common Display Messages 4 - 6
PL-443 i
Program Mode 4 - 3
Functional
Transceiver 5 - 1
Damping and Process Rate 5 - 1
Temperature Compensation 5 - 2
Sound Velocity 5 - 2
Blanking 5 - 3
Agitator Discrimination 5 - 4
Relays General 5 - 4
Function
Alarm 5 - 5
Pump 5 - 6
Miscellaneous 5 - 7
Analog Output 5 - 10
Applications 6 - 1
Simple Level Application 6 - 2
Pump Control Applications 6 - 4
Pump Run-On 6 - 8
Pump Totalizer Application 6 - 10
Volume Application 6 - 14
Common Tank Shapes 6 - 15
Custom Design Tanks 6 - 16
Compensation 6 - 19
Differential Level Application 6 - 22
OCM Applications 6 - 26
Single Exponential 6 - 33
Palmer-Bowlus 6 - 37
H Flumes 6 - 38
Other 6 - 39
Applications with Standpipes 6 - 42
PL-443 ii
Parameter Description
Parameters 7 - 1
Troubleshooting
General 8 - 1
Oscilloscope 8 - 1
Troubleshooting Guide 8 - 3
Maintenance
Maintenance 9 - 1
Appendices
Sound Velocities 10 - 1
Glossary 10 - 2
Alphabetical Parameter Listing 10 - 4
PL-443 iii
■
GENERAL INFORMATION
IMPORTANT
First and foremost it is essential that this manual be read and understood before
installation and start up of the MultiRanger Plus.
"Applications" provides a general description of the common applications found in
industry and illustrates them with examples. It is suggested that you refer to the
sub-section which most suits your application. The programming of the MultiRanger
Plus can be optimized by referring to Parameter Description or Appendices \
Alphabetical Parameter Listing.
THE MULTIRANGER PLUS
The MultiRanger Plus is a multi-purpose level monitoring system consisting
of a MultiRanger Plus in a CSA type 4 enclosure, a programmer and an
ultrasonic transducer.
The MultiRanger Plus emits an ultrasonic pulse via the transducer. The echo is
reflected from the material and received by the transducer. The echo is processed by
the MultiRanger Plus and the time at which the ultrasonic pulse hits the level or target
is extracted and compared to the time at which it was sent. The time differential is
then converted into distance, material level, volume, flow or differential level as a
basis for display, relay control, analog output and totalling.
As well as simple level measurement, the MultiRanger Plus was designed to handle
specific applications such as: pumped volume totalling, differential level and open
channel flow measurement.
PL-443 1 – 1
■
SPECIFICATIONS
MULTIRANGER PLUS
Power: » 100/115/200/230 V ±15%, stab selective
» 50/60 Hz, 15 VA
» optional: » 12 V dc model, 10 to 18 V dc
Fuse: » 1/4 amp MDL Slo-Blo or equivalent
Range: » 0.3 to 15 m (1 to 50 ft)
Accuracy: » 0.25% of range or 6 mm (0.24"), whichever is greater
Resolution: » 0.1% of range or 2 mm (0.08"), whichever is greater
Memory: » EEPROM (non-volatile) no back-up battery required
Display: » Liquid Crystal Display of 4 digits, 18mm (0.7") high
Operating Temperature: » – 20 to 60 °C (– 5 to 140 °F)
Outputs: transducer drive: » 41 KHz, 400 V peak pulses of 1 msec
max duration at a max
repetition rate of 300 msec
analog: » 0 - 20 or 4 - 20 mA
» max loading: » 350 ohms, return to ground
» 24 V dc model, 18 to 36 V dc
» 750 ohms, return to –12 V
» resolution: 0.1% of range
» optional mA isolator
relays: » 5 multipurpose relays (for alarms, pump control,...)
» 1 Form "C" SPDT contact per relay, rated 5 A at
220 V ac non-inductive
» adjustable deadband
All relays are certified for use in equipment where the short
circuit capacity of the circuits in which they are connected is
limited by fuses having ratings not exceeding the rating of the relays.
Enclosure: » CSA enclosure type 4 (similar to NEMA 4)
» 160 mm W x 250 mm H x 82 mm D
(6.3" W x 9.5"H x 3.2"D)
» polycarbonate
Approvals: » CE
Weight » 1.8 kg (4lb)
PL-443 2 – 1
96/01/22
PROGRAMMER
Enclosure: » general purpose
Operating Temperature: » – 20 to 50 °C (– 5 to 122 °F)
Power: » 9 V battery (style - ANSI/NEDA 1604)
» 67 mm W x 100 mm H x 25mm D
(2.6" W x 4" H x 1" D)
» ABS plastic
TRANSDUCER
Refer to associated Transducer manual.
TEMPERATURE SENSOR
Refer to associated Temperature Sensor manual
CURRENT OUTPUT ISOLATOR (Optional, refer to PL-293)
Model: » LIs-1 loop isolator
Input: » 4 - 20 mA dc (from MultiRanger Plus)
Output: » 4 - 20 mA dc into 600 ohm max
Isolation: » 300 V ac continuous
Common Mode Rejection » 100 dB at 60Hz
CABLING
Optional: » RG-62A/U coax
» max distance to electronics: 365 m (1200 ft)
» must be run in grounded metal conduit
Temperature Sensor: » Belden 8760, 2 wire shielded
» max distance to electronics: 365 m (1200 ft)
» can be run with transducer cable
PL-443 2 – 2
■
INSTALLATION
97 mm
(3.8")
82 mm
(3.2")
MULTIRANGER PLUS
The MultiRanger Plus should be mounted in an area that is within the unit’s ambient
temperature range, and is suitable for CSA type 4 enclosures and polycarbonate
material. The front cover should be accessible for programming and viewing.
It is advisable to keep the MultiRanger Plus away from high voltage or current runs,
contactors and SCR control drives.
Do not mount the multiranger plus in direct sunlight
without the use of a sun shield.
OUTLINE AND MOUNTING
160 mm
(6.3")
131 mm
(5.1")
228 mm
(9")
lid screws
(6 places)
240 mm
(9.5")
programmer
suitable location for conduit entrances
mounting holes
(accessed under lid
4.3 mm (0.17") dia.
4 places
Milltronics recommends using a punch for making holes in enclosure.
PL-443 3 – 1
lid, clear
polycarbonate
enclosure, CSA
enclosure 4 polycarbonate
customer mounting
screw
CIRCUIT BOARD LAYOUT
18 to 36 V dc operation
24 V dc model
optional isolator
daughter board
10 to 18 V dc operation
12 V dc model
motherboard
PL-443 3 – 2
INTERCONNECTION
transducer
#2
All wiring must be done in conjunction with approved conduit,
boxes and fittings and to procedures in accordance
with all governing regulations.
Note :
— — — — indicates customer wiring in all diagrams.
INSTALLING THE TRANSDUCER
Basic Wiring
black
white /
shield
Differential Level - Basic Wiring
refer to transducer manual
for wiring details
PL-443 3 – 3
white /
shield
transducer
#1
black
white /
shield
SELECTING TEMPERATURE SOURCE
mA Output - FLOATING
(additional to basic wiring)
board ‘B’
Integral Sensor (transducer)
board ‘B’
CURRENT OUTPUT
mA Output - GROUNDED
(additional to basic wiring)
Note : TB1-2 is internally
connected to electrical
ground TB1-28.
TS-3 or Program
to customer’s equipment
maximum loading 350 Ω
PL-443 3 – 4
mA output wiring into floating input ONLY.
750 Ω max. Do Not Ground!
CURRENT OUTPUT ISOLATOR
TB1
If the isolator has not been factory installed, mount it on the upper left hand corner of
the motherboard using the two long machine screws provided. The input terminals of
the isolator are then connected to the motherboard output terminals,TB-1, using
twisted pair maximum 16 gauge wire.
Proper shielding and grounding are required in order to minimize noise levels that
could otherwise affect weak receiver signals by introducing false echoes.
The isolator enclosure is grounded by the mounting bolts to the motherboard. This
can be checked with an ohmmeter if a poor connection is suspected.
The isolator output wiring must be a shielded twisted pair. The shield must be
intact up to the isolator and the shield grounded at the isolator mounting screw
only. Do not ground shield at any other point as this will void isolation.
mA Output - Optional Isolation
(additional to basic wiring)
Customer Wired
Keep shield intact up to output terminals.
Ground shield at screw ONLY!
optional
LIs-1
isolator
Route output wiring
cable in separate
conduit, entering
enclosure as near as
possible to isolator.
Keep wiring as short
as possible. Do not
route cable along
terminal board.
isolated 4 - 20 mA output wiring into 600 Ω max
Factory Wired
optional
LIs-1
isolator
isolated 4 - 20 mA output wiring into 600 Ω max
PL-443 3 – 5
TB1
SYNCHRONIZATION
to next MultiRanger Plus
to next MultiRanger
TB1-9 or next
MultiRanger Plus
TB1-4
In applications where more than one MultiRanger Plus, up to a maximum of 8, are
going to be used or where their transducers will be sharing a common conduit,
synchronization is required. When synchronized, no MultiRanger Plus(s) will transmit
within 180 msec of the prior one(s).
To synchronize MultiRanger Plus’s, interconnect the SYNC terminals TB1-4 of all
motherboards and ensure that there is a common hydro ground interconnecting
all units.
To synchronize MultiRanger Plus’s and MultiRangers, interconnect the SYNC terminal
TB1-4 of the MultiRanger Plus to the SYNC terminal TB1-9 of the MultiRanger.
To synchronize more than 8 MultiRangers or MultiRangers with other Milltronics
ultrasonic level detection models (e.g. MicroRanger, AirRanger, etc...) consult
Milltronics or your distributor.
Synchronization of 2 to 8 MultiRanger Plus’s
(additional to basic wiring)
MultiRanger Plus #1
Synchronization of 2 to 8 MultiRanger / MultiRanger Plus’s
MulitRanger Plus
(additional to basic wiring)
All units to be synchronized must be
PL-443 3 – 6
interconnected by a common hydro ground.
MultiRanger Plus #2
MultiRanger
POWER CONNECTIONS
18 to 36 V dc
ac Volage Selection
The MultiRanger Plus accepts 100, 115,
200 or 230 V ac per jumper ‘J9’ (board B)
selection or 10 to 36 V dc.
ac Power
select voltage via J9
on board B
12 V dc Model
10 to 18 V dc
24 V dc Model
PL-443 3 – 7
PROGRAMMER
In order to program the MultiRanger Plus, a programmer ( which has a magnetic back
plate ) must be placed into the front cover recess on the MultiRanger Plus. Be sure to
keep it away from objects such as floppy disks that are susceptible to damage from
magnetic fields.
A programmer need not be ordered with each unit.
Check your order if you think that the programmer is missing.
PL-443 3 – 8
■
START UP
GENERAL
The MultiRanger Plus has two modes of operation: Run and Program (Cal). When
the unit is powered up, after installation procedures have been completed, it is factory
set to start up in the run mode, to detect the distance from the transducer face to the
target in meters. This is the normal mode of operation, which can be programmed to
display level, volume, totals or flow readings and yield corresponding mA output and
relay closures for alarms, pump controls, etc.
The program mode is selected by pressing the
the user to program the MultiRanger Plus to suit his preference and to the particular
application to which the MultiRanger Plus is being applied.
The first step when programming is to reset all parameters to their
After having entered all required parameters, the MultiRanger Plus can be made to
simulate its operation within the particular application giving display, relay operation
and analog output. Refer to parameters P-76 through P-78.
When programming has been completed, the MultiRanger Plus can be put into normal
operation by pressing the
factory setting by using the master reset P-99
Run/Cal
key.
Run/Cal
key. This mode will enable
PL-443 4 – 1
PROGRAMMER KEYPAD
All entries are made via the programmer keypad.
Run Mode
Press the associated key to view.
H TOT • high total; P-2 = 4 or 5 (P-55)
L TOT • low total; P-2 = 4 or 5 (P-54)
HEAD head reading, P-2 = 5
FLOW flow rate, P-2 = 5
mA mA output
TEMP temperature (P-65)
RATE rate of level change (P-70)
CONF echo confidence (P-80)
HRS 1 pump 1 service hours (P-24)
HRS 2 pump 2 service hours (P-25)
HRS 3 pump 3 service hours (P-26)
HRS 4 pump 4 service hours (P-27)
HRS 5 pump 5 service hours (P-28)
• PT 1; press to view level at DLD
transducer #1 P-2 = 3
• PT 2; press to view level at DLD
transducer #2, P-2 = 3
PL-443 4 – 2
READ reading (P-76)
RUN initiates access into
CAL program mode
DIST press to view distance (P-78)
Program Mode
1
CLR
RUN
CAL
MEAS
ALT
DISP
9
to
numeric entry
decimal point entry
negative entry
clear display
completes access
into program mode
enter run mode
press to make
a measurement
increments display to
show the next parameter
decrements display to
show the preceeding parameter
alternates display to show either
the parameter number or
parameter value
PL-443 4 – 3
enters display as contents of
ENTER
selected parameter
LEGEND
Press the associated key on programmer:
Display shown on MultiRanger Plus:
Display appears for a short time:
Programmer key:
ENTER
PARAMETER ENTRY
Initial start up
All entries are made via the programmer keypad. All programmers are
interchangeable, thus any programmer can be used in conjunction with any
MultiRanger Plus.
Apply power to the MultiRanger Plus and place the programmer in its front
cover recess. will be momentarily displayed and then a distance reading
e.g. will appear. This is a space or distance reading of up to
approximately 12 m.
If is alternately displayed, an open or short circuited transducer
connection is being indicated.
If is displayed rather than a continuous numeric reading the actual material
distance may be beyond 12 m. Proceed with the programming and if
persists, consult Troubleshooting guide.
To enter Program mode
RUN
CAL
The user may now program the MultiRanger Plus starting at parameter P-1.
To direct access a parameter:
The display should have a ‘ P- ’ and the number of the currently selected parameter.
Current parameter selection
Select desired parameter.
2 0
??
e.g. select
parameter P-20
PL-443 4 – 4
To set a parameter:
scroll ahead to P-21
e.g. value of P-21
access desired parameter e.g. P-20
ENTER
ALT
DISP
5
display parameter value e.g. 0
select new option e.g. 5
new value is entered and displayed e.g. 5
To reset a parameter to its factory value:
e.g. reset P-20
ENTER
ALT
DISP
CLR
display parameter value
display will go blank
factory setting of parameter is entered
and displayed
After a minute and a half, the content display will revert to the parameter number if
the keypad is not used further. Press again if it is desired to return to a display
of the content.
ALT
DISP
To access the next parameter:
To access the previous parameter:
PL-443 4 – 5
parameter number
displayed
parameter content
displayed
e.g. value of P-20
value of P-21
scroll back to P-20
value of P-20
COMMON DISPLAY MESSAGES
cable loss of echo » messages CAbL and LOE will alternately
have entered » appears after pressing
program mode "RUN/CAL" key
clear all parameters » P-99
- return factory setting
overflow » reading is larger than display capabilities
loss of echo » displayed in run mode to indicate
percent » appears when programming units of
parameter number » indicates which parameter is
flash, indicating open or short circuited
transducer connection
loss of echo
measurement in percent
being displayed
have entered » appears after pressing
run mode "RUN/CAL" key
no value » contents of parameter empty or
invalid request » application does not yield requested
PL-443 4 – 6
no reading display
reading option or spare parameter
■
FUNCTIONAL
TRANSCEIVER
The MultiRanger Plus transceiver will transmit via the transducer, a set of long and/or
short pulses per measurement. The number and duration of the pulses is dependent
upon P-88.
A short pulse has a maximum measurement range of 2 m (6.6 ft) from the transducer
face.
A long pulse has a measurement range of 2 m (6.6 ft) from the transducer face out to
its maximum setting (P-3, empty distance to transducer plus P-87, range extension).
DAMPING AND PROCESS RATE
The MultiRanger Plus provides damping to control the maximum rate of change of the
displayed material level, volume or flow rate and of the mA output signal. As most
relay functions respond to the dampened level reading, they indirectly fall under the
control of the damping function. Damping may be set within the range of 0.001 to
9999 in units selected per minute (eg. if P-1 = 3 and P-68 = 15, then the fill damping
rate is 15 ft/min). P-68 is set to provide damping specifically for filling conditions while
P-69 is set to provide damping specifically for emptying conditions.
The required damping may be estimated by filling and emptying the vessel at its
normal rate. The rate of material level change can be viewed via the process rate
display parameter, P-70 or by pressing "7" while in the run mode. The value of P-68
and P-69 should be equal to or greater than the rates of level change encountered in
P-70. The process rate averaging parameter P-71 selects the method of averaging
used to determine the process rate display, however it has no bearing on the
damping function.
Damping is often used to slow down the rate of response of the display especially
where liquid surfaces are in agitation or material falls into the sound path during filling.
When in the program mode, the damping is automatically overridden to give fast
response when "MEAS" is pressed. In the run mode, the response can be further
increased by turning the fuzz filter (P-72) and agitator discriminator (P-73) off
- ONLY if they are not required.
If the transducer aiming is being adjusted while in the run mode, it is suggested that
damping be at its factory setting of 10 to start. The damping can later be changed to
suit prevailing conditions.
Upon a loss of echo condition and after the fail-safe timer (P-75) expires, the display
will go to fail-safe high at the fill damping rate if P-74 = 1 or to fail-safe low at the
empty damping rate if P-74 = 2.
PL-443 5 – 1
TEMPERATURE COMPENSATION
In order to provide compensation for uniform temperature variances of the sound
medium, temperature compensation is provided. Temperature compensation consists
of on board circuitry in the MultiRanger Plus and the integal (transducer) temperature
sensor. The integral temperature sensor uses the transducer’s wiring and input
terminals (TB1 - 8/9) to interface with the on board circuitry. Note: board ‘B’ jumper
‘J2’ must be set to ‘TRANS’.
Optionally, the alternate TS-3 Temperature Sensor can be used to provide a
temperature input, rather than by using the integral temperature sensor.
In order to do this:
» set board ‘B’ jumper ‘J2’ to ‘TS / P65’
» optional TS-3 Temperature Sensor must be connected to TB1 - 5/6/7
If the temperature of the sound medium is to remain constant, compensation may be
programmed into the MultiRanger Plus instead of using the remote sensor input by
one of the following methods:
1. » set board ‘B’ jumper ‘J2’ to ‘TS / P65’
» insure that the temperature sensor input TB1 - 5/6 is left open/unconnected
» select P-65
» enter temperature in °C
2 » set board ‘B’ jumper ‘J2’ to ‘TS / P65’
» insure that the temperature sensor input TB1 - 5/6 is left open/unconnected
- select P-61
- perform an empty calibration
The following temperature functions (in °C) can be viewed:
P-65 air temperature » present temperature at sensor
or
» programmed temperature, if sensor not used
P-66 max. air temperature » highest temperature encountered during operation
P-67 min. air temperture » lowest temperature encountered during operation
SOUND VELOCITY
The MultiRanger Plus can be calibrated for transducer operation in homogeneous
vapours with sound velocities other than that of air.
The basis is to physically measure the level (measuring tape or sight glass) and enter
this value via P-61. The MultiRanger Plus then calculates the sound velocity by
comparing the entered physical measurement to its own ultrasonic measurement
(empty calibration, P-61)
PL-443 5 – 2
P-63, velocity at 20 °C can be used to enter the known velocity at 20 °C of sound in a
far end
blanking
range extension (P-87)
as % P-3
particular gas or vapour to view the resultant velocity of a sound velocity
compensation, normalized to 20 °C.
P-64, velocity at P-65, can be used to enter the known velocity of sound in a particular
gas or vapour, or to view the resultant velocity of a sound velocity compensation, at
the temperature of P-65.
Refer to Appendices/Sound Velocities, for typical sound velocities in various gases
and vapours.
BLANKING
Near blanking (P-5) is used to ignore the zone in front of the transducer where ringing
or other false echo is at a level with the processing of the true echo.
ringing
typical receiver signal
true echo
(level)
false echo
Ringing is the inherent nature of the transducer mass to continue vibrating after the
transmit pulse has ceased. The amount of ringing varies with the type of transducer
used and decays to acceptable levels in the order of milliseconds. Excessive cold and
overtightening of the transducer mounting will increase the ring time such that it may
appear as an echo during the receive cycle. This is usually indicated by an incorrect
high level reading. This condition may be verified with the use of an oscilloscope and
may be overcome by increasing the near blanking (refer to Troubleshooting).
Far end blanking is a design function that ignores the zone below the zero or empty
level where false echoes may appear at levels that interfere with the processing of
true echo.
In applications where the zero level is above the bottom of the vessel and it is desired
to monitor the zone below the normal zero, range extension (P-87) may be used to
extend the range into the far end blanking. Range extension is entered as a percent of
P-3. As range extension reduces the protection afforded by the far end blanking, it
should be used judiciously. Avoid excessive range extension as this may reduce the
PL-443 5 – 3
end of
transmit
P-5
near blanking
empty distance to transducer
P-3
range
typical processed signal
0
level
measurement’s reliability and accuracy. If it is found that false echoes are appearing
ahead of the blanking zone, P-87 should be reduced accordingly.
Blanking is automatically corrected for sound velocity change where temperature
and velocity compensation is used, keeping the blanking at the distance at which it
was entered.
AGITATOR DISCRIMINATION
In applications where there is an agitator operating in the vessel, the blades may
interfere with level readings when the material level is lower than the blades. In such a
case, the agitator discriminator (P-73) can be turned on (factory setting).
With the agitator turned on, the reading will not change unless the echo is closer for at
least 5 consecutive measurements nor will it change unless the echo is farther for at
least 2 consecutive measurements.
This feature allows the MultiRanger Plus to remain locked on the true echo, even if
there are occasional false echoes due to the agitator blades, electrical noise or
crosstalk from other ultrasonic units.
Agitator discrimination, however, slows down the MultiRanger Plus’s speed of
response. Therefore, if fast response is required, especially when aiming the
transducer while in the run mode, and there is no agitator involved, the discriminator
should be turned off.
Agitator discrimination will not work if the blades are
stationary and in the transducer’s beam path.
RELAYS
General
Five onboard multi-purpose relays are provided on the MultiRanger Plus. Each relay
may be independently assigned to one function and has a corresponding status LED,
visible through the front cover.
The relay functions fall under three modes of operation :
» alarm : alarm ON = LED ON = relay coil de-energized
» pump : pump ON = LED ON = relay coil energized
» miscellaneous : contact closed = LED ON = relay coil energized
Complete programming of each relay requires two steps. Refer to the Relay
Programming Chart Relays.
1 - select a relay function
2 - enter relay ON/OFF setpoints for function options 1-6 and 8-10.
OR
- set control parameters for function options 7,11,12,13 and 14.
PL-443 5 – 4
Function
Alarm
level : - in high alarm, the function goes on when the level rises
in bounds : - the relay will be in alarm if the level is inside the zone
out of bounds : - the relay will be in alarm if the level is outside the
differential : - the high alarm function goes on when differential
rate of change : - in filling alarm, the function goes on when the rate of filling
to the ON setpoint and goes off when the level lowers to
the OFF setpoint. In low alarm, the function goes on
when the level lowers to the ON setpoint and goes off
when the level rises to the OFF setpoint.
between the setpoints.
zone between the setpoints.
level increases to the ON setpoint and goes off when the
differential level decreases to OFF setpoint. The low alarm
function goes on when the differential level decreases
to the ON setpoint and goes off when the differential level
increases to the OFF setpoint.
increases to the ON setpoint and goes off when the rate of filling
drops to the OFF setpoint. In emptying alarm, the function goes
on when the rate of emptying increases to the ON setpoint and
goes OFF when the rate of emptying drops to the OFF setpoint.
For emptying alarm, the setpoints must be entered as
negative values.
temperature : - in high alarm, the function goes on when the temperature rises to
loss of echo : - the function goes on when the fail-safe timer expires. The function
PL-443 5 – 5
the ON setpoint and goes off when the temperature lowers to the
OFF setpoint. In low alarm, the function goes on when the
temperature lowers to the ON setpoint and goes off when the
temperature rises to the OFF setpoint.
goes OFF when a valid echo is received (fail-safe timer is reset).
Pump
level : - in pump down, the function goes on when the level rises
sequential : - refer to Applications\Pump Control. Select function option 8, 9 or 10
differential : - the pump down function goes on when differential
to the ON setpoint and goes off when the level lowers to the
OFF setpoint. In pump up, the function goes on when
the level lowers to the ON setpoint and goes off when the
level rises to the OFF setpoint.
and press "*" to scroll through the loss of echo defaults.
For option 9, pressing "*" will also scroll through the cumulative,
ratio or duty/back-up mode of pump up operation.
level increases to the ON setpoint and goes off when the
differential level decreases to OFF setpoint. The pump up
function goes on when the differential level decreases
to the ON setpoint and goes off when the differential level
increases to the OFF setpoint.
LCD display
loss of echo default
En = energized, pump ON after P-75 expires
dE = de-energized, pump OFF after P-75 expires
Ho - hold prior relay status after P-75 expires
:
sequential loop. optional to function 9
blank = cumulative
’ = duty/back-up
A = ratio
function
8 = level, fixed roster
9 = level, sequential
10 = differential
e.g. dE : ’9 = duty/back up sequential pumping
PL-443 5 – 6
de-energize under loss of echo
Loading...