Milltronics HydroRanger I Instruction Manual

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HYDRORANGER I

PROGRAMMABLE LEVEL SYSTEM

Instruction Manual

PL-399

May 1993

33453990

PROCESS MEASUREMENTS

Table of Contents

I GENERAL INFORMATION

Important 1 – 1 HydroRanger I 1 – 1

II SPECIFICATIONS

HydroRanger I 2 – 1 Programmer 2 – 2 Transducer 2 – 2 Alternate Temperature Sensor 2 – 3 Current Output Isolator 2 – 3 Cabling 2 – 3

III INSTALLATION

HydroRanger I 3 – 1 Transducer 3 – 1 Programmer 3 – 1 Current Output Isolator 3 – 2 Interconnection 3 – 2 Synchronization 3 – 2 Internal Checks 3 – 3

IV START-UP

General 4 – 1 Programmer Keypad Summary 4 – 2 Parameter Entry 4 – 3 Display Messages 4 – 6

V FUNCTIONAL

Transceiver 5 – 1 Transducer 5 – 1 Damping and Process Rate 5 – 1 Temperature Compensation 5 – 2 Sound Velocity 5 – 3 Blanking 5 – 3 Agitator Discrimination 5 – 4 Relays 5 – 5 Analog Output 5 – 10

VI APPLICATIONS

Simple Level Application 6 – 3

Example 1

Pump Control Application 6 – 7

Example 2

Pump Run-on 6 – 10 Pump Totalizer Application 6 – 13

Example 3

Volume Application 6 – 17

Example 4

Differential Level Application 6 – 25

Example 5

OCM Application 6 – 29

Example 6a

Other 6 – 41

Example 6b

Applications with Standpipes 6 – 44

Example 7

VII PARAMETER DESCRIPTION

Parameters 7 – 1

VIII TROUBLESHOOTING

Oscilloscope 8 – 1 Troubleshooting guide 8 – 4

IX MAINTENANCE AND SPARE PARTS

Maintenance 9 – 1

X APPENDICES

Sound Velocities 10 – 1 Glossary 10 – 2 Alphabetical Parameter Listing 10 – 4

Illustrations

Fig. 1 HydroRanger I Outline and Mounting Diagram Fig. 2 Circuit Board Layout

SECTION I

GENERAL INFORMATION

IMPORTANT

First and foremost, it is essential that this manual be read and understood before installation and start-up of the HydroRanger I.

Section VI, 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 calibration may be further optimized by referring to Section VII, Parameter Description or Appendix III, Parameter Listing.

The HydroRanger I

The Milltronics HydroRanger I is a multi-purpose level monitoring system consisting of a HydroRanger I in a watertight enclosure, a programmer and a transducer.

The HydroRanger I 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 HydroRanger I 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. This time differential is then converted into distance, material level, volume flow or differential level as a basis for display, relay control, analog output and totalizing.

As well as simple level measurement, the HydroRanger I was designed to handle specific applications such as: pump control, pumped volume totaling, differential level and open channel flow measurement.

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PL-399 1 – 1

SECTION II

SPECIFICATIONS

HydroRanger I

Power » 100/115/200/230 V ±15%, stab selectable

» 50/60 Hz, 15 VA

» optional : » 12 V DC model, 10 to 18 V DC

» 24 V DC model, 18 to 36 V DC

Fuse » 1/4 amp MDL Slo-Blo or equivalent

Range » 0.3 to 10 m (1 to 33 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

4 digits - 18 mm (0.7") high

Operating Temp. » -20 to 60 °C (range in which electronics will (-5 to 140 °F) operate within specs, includes temperature rise above ambient due to operation in enclosure.)

Ambient Temp. » -20 to 50 °C (range outside of (-5 to 122 °F) HydroRanger I enclosure)

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

750 ohms, return to -12 V

» resolution: 0.1% of range

» optional mA isolator

PL-399 2 – 1

relays » 5 multi-purpose relays (for alarms, pump control, ...)

» 1 Form ’C’ SPDT contact per relay, rated 5 A at 220 V AC non-inductive

» adjustable deadband

NOTE: 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 type 4 (NEMA 4/ IP 65 style)

» 160 mm W x 240 mm H x 82 mm D (6.3" W x 9.5" H x 3.2" D)

» polycarbonate

Weight » 1.8 Kg (4 lb)

Programmer

Enclosure » general purpose

» 67 mm W x 100 mm H x 25 mm D (2.6" W x 4" H x 1" D)

» ABS plastic

Operating Temp. » -20 to 50 °C

(-5 to 122 °F)

Battery » 9 V (ANSI/NEDA 1604, PP3 or equivalent)

Transducer

Model » ST-H with integral temperature sensor

Construction » 1" NPT conduit thread with standard 10 m (33 ft)

of neoprene jacketed cable.

» 2" NPT, 2" BSP or PF2 mounting thread

» Tefzel

Operating Temperature » -40 to 73 °C (-40 to 165 °F)

Pressure (vessel) » 200 kPa (2 bar or 30 psi) max.

encapsulated

Beam Angle » 12°

PL-399 2 – 2

Options » Flange Adapter Kit. Refer to PL-397.

» Submergence Coupling. Refer to PL-403

Temperature Sensor

(Optional)

Model: » TS-3

Refer to associated Temperature Sensor Manual, PL-401.

Current Output Isolator

(Optional)

Model: » LIs-1 loop isolator

Refer to associated Current Output Isolator manual, PL-293.

Cabling

(Optional)

Transducer » RG-62U coax

» max. distance to electronics: 336 m (1200 ft.) » must be run in grounded metal conduit

Temp. Sensor » Belden 8760, 2 wire shielded

» max. distance to electronics: 336 m (1200 ft.) » can be run with transducer cable.

TEFZEL



Tefzel is a fluoropolymer inert to most chemicals. For exposure to specific environments, check with chemical compatibility charts before installing and operating the HydroRanger I in your application.



Tefzel

is a registered trade mark of Dupont.

■

PL-399 2 – 3

SECTION III

INSTALLATION

HydroRanger I

The HydroRanger I should be mounted in an area that is within the unit’s ambient temperature range and is suitable for the specified enclosure. The front cover should be accessible for calibrating and viewing.

It is advisable to keep the HydroRanger I away from high voltage or current runs, contactors and SCR control drives.

DO NOT MOUNT THE HydroRanger I

IN DIRECT SUNLIGHT

WITHOUT THE USE OF A SUN SHIELD

Refer to Figure 1 for outline and mounting dimensions.

Transducer

NOTE: Wiring of transducer cable must be done in conjunction with approved

conduit, boxes and fittings and to procedures in accordance with all governing regulations. All transducer cabling must be run in grounded metal conduit for optimum noise rejection. Refer to Figure 4 for outline and wiring.

1. Mount the transducer above the highest anticipated material level by at least 30 cm (1 ft).

2. Install the transducer so that it can have a clear sound path perpendicular to the liquid surface.

3. To avoid false echoes, install the transducer such that the sound path will not intersect vessel fill spouts, rough vessel walls, ladders ... etc. Where possible, the transducer should be mounted 0.3 m (1 ft) from the closest vessel wall for every 3 m (10 ft) of depth.

Example: if the vessel is 10 m deep, the transducer should be mounted

at least 0.3 m/3 m x 10 m = 1.0 m from the closest vessel wall.

Programmer

In order to calibrate the HydroRanger I, a programmer must be set into the recess on the HydroRanger I front cover. It can be removed when operating in the RUN mode. (Note: since a programmer need not be ordered with each unit, check your order if you think that the programmer is missing).

PL-399 3 – 1

Current Output Isolator

The isolator is mounted onto the upper left hand corner of the motherboard using the two long machine screws provided. It is then interconnected from its input terminals to the motherboard output terminals, TB-1, using twisted pair maximum 16 ga. wire. Refer to Figure 2 and 3.

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.

Interconnection

NOTE: All wiring must be done in conjunction with approved conduit, boxes and

fittings and to procedures in accordance with all governing regulations.

Refer to Figure 2 for wiring of power, analog output, transducer and temperature sensor to the main electronics.

Synchronization

In applications where more than one HydroRanger I, 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 HydroRanger I(s) will transmit within 180 mSec. of the prior one(s).

To synchronize HydroRanger I’s, interconnect the SYNC terminals TB1-4 of all motherboards and ensure that there is a common hydro ground interconnecting all units.

To synchronize HydroRanger Is and MultiRanger Plus’s interconnect the SYNC terminals TB1-4 of all motherboards and ensure that there is a common ground interconnecting all units.

To synchronize HydroRanger I’s and MultiRangers, interconnect the SYNC terminal TB1-4 of the HydroRanger I 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, AiRanger, etc. ...), consult

Milltronics or your distributor.

Refer to Figure 3 for details on synchronization wiring.

PL-399 3 – 2

Internal Checks

•

If the integral ST-H temperature sensor is not used, jumper ‘J2’ must be set to ‘TS/P65’.

•

Make sure that voltage stab connector, ‘J9’, is properly set for either 100, 115, 200 or 230 V AC operation.

•

One fuse, 1/4 Amp, must be installed.

•

Make power connection. Be sure that wires are securely fastened and to proper terminals,

do not operate with grounding (earthing) wire disconnected.

PL-399 3 – 3

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SECTION IV

START-UP

General

The HydroRanger I has two modes of operation: RUN and CALIBRATE. 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 CALIBRATE mode is selected by pressing the RUN/CAL keypad switch. This mode will enable the user to calibrate the HydroRanger I to suit his preferences and to the particular application to which the HydroRanger I is being be applied.

NOTE

The first step when calibrating is to reset all parameters to their

factory setting by using the master reset P-99.

After having entered all the required parameters, the HydroRanger I 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 calibration has been completed, the HydroRanger I can be put into normal operation by pressing the RUN/CAL keypad switch.

Unsatisfactory response in the run mode, after calibrating, may indicate that the transducer aiming requires adjustment.

PL-399 4 – 1

Programmer Keypad Summary

1 9

—

Calibrate mode: numeric entries

Run mode: 1 = H.TOT; press to view high total, P-2 = 4 or 5 (P-55)

press to view level at DLD transducer #1, P-2 =3 2 = L.TOT; press to view low total, P-2 = 4 or 5 (P-54)

press to view level at DLD transducter #2, P-2 =3 3 = HEAD; press to view head reading, P-2 = 5 4 = FLOW; press to view flow rate, P-2 = 5 5 = mA; press to view mA output 6 = TEMP; press to view temperature (P-65) 7 = RATE; press to view rate of level change (P-70) 8 = CONF; press to view echo confidence (P-80) 9 = HRS 1; press to view pump 1 running time (P-24) 0 = HRS 2; press to view pump 2 running time (P-25)

Calibrate mode: decimal point entry

Run mode: HRS 3; press to view pump 3 running time (P-26)

Calibrate mode: negative entry

Run mode: HRS 4; press to view pump 4 running time (P-27)

CLR

RUN CAL

MEAS

↑

↓

Calibrate mode: clears display

Run mode: HRS 5; press to view pump 5 running time (P-28)

Calibrate mode: used to initiate parameter display after having entered

the calibrate mode or used to calibrate for percent reading

Run mode: READ; press to view reading (P-76)

Alternates operating modes

Calibrate mode: press to take a measurement

Run mode: press to view distance (P-78)

advance to next parameter

go back to previous parameter

PL-399 4 – 2

ALT

DSP

alternates display to show either the parameter number or parameter contents

ENTER

enters display as contents of selected parameter

Parameter Entry

Initial Start-Up

NOTE All entries are made via the calibrator keypad. All calibrators are

interchangeable, thus any calibrator can be used in conjunction with any HydroRanger I. The term “key” refers to any keypad switch of the calibrator.

1)Apply power to the HydroRanger I and place the calibrator in its front cover recess

run will be momentarily displayed and then a distance reading corresponding to

the parameter factory settings will appear. This is a space or distance reading of up to approximately 12 m.

If ’CAbL’/’LOE’ is alternately displayed, an open, short circuited or reversed polarity transducer connection is being indicated.

If LOE is displayed rather than a continuous numeric reading the actual material distance may be beyond 12 m. Proceed with the calibration and if LOE persists, consult the troubleshooting guide, Section VIII.

2)press

RUN CAL

CAL will be displayed

3)press

P-1 will appear

NOTE: the CAL display will revert to the run mode if is not pressed within a

minute and a half of initially pressing the CAL switch.

The user may now program the HydroRanger I.

PL-399 4 – 3

Parameters are entered as follows:

With ’P-#’ displayed, the user may increment or decrement the displayed parameter until the desired parameter is obtained or access the desired parameter directly by pressing the appropriate numbers on the keypad.

e.g.’P-1’ is displayed, P-27 is desired.

Press and then .

2 7

P-27 will be displayed.

If the wrong switch is depressed, press to clear the parameter display and the

CLR

desired numbers again selected.

Setting Parameters:

Once the desired parameter has been obtained on the display,

Press

ALT

DSP

this will cause the display to show the contents of the selected parameter. The contents may be changed to a new value or code by pressing the de-

sired numbers and then .

ENTER

NOTE: after a minute and a half, the contents display will revert to the parameter

ALT

number if the keypad is not further used. Press again if desired to

DSP

return to display of contents.

e.g. P-1, units, is displaying a value of ’2’ (cm); 1-% (% meters) is desired

press

1 *

and then

1P will be displayed

press

ENTER

1P will momentarily flash off to indicate that it has been entered.

PL-399 4 – 4

To set the next parameter:

press

↑

the next parameter will be displayed momentarily, followed by a display of its contents. The contents may be changed as previously described.

To directly access a parameter:

press

ALT

DSP

P-#

will be displayed

enter desired parameter number

press

ALT

DSP

the contents of this parameter are now displayed and may be changed as previously described.

To reset a parameter to its factory value:

select the desired parameter

press

ALT

DSP

present contents will be displayed

press

CLR

display will go blank

press

ENTER

factory setting of selected parameter is displayed and automatically entered.

PL-399 4 – 5

Display Messages

Display Message Comment

CAbL LOE

CAL

C.ALL

EEEE

LOE

P-#

run

cable loss of echo » messages CAbL and LOE

will alternately flash, indicating open, short circuited or reversed transducer connection

have entered calibrate mode

clear all parameters -

» appears after pressing

“RUN/CAL” switch

»P-99

return factory setting

overflow » reading is larger than display

capabilities

loss of echo » displayed in run mode to

indicate loss of echo

percent » appears when calibrating units

of measurement in percent

parameter number » indicates which parameter is

being displayed

have entered run mode » appears after pressing

“RUN/CAL” switch

- - - - -

no value » contents of parameter empty

or no reading display

invalid request » application does not yield

requested reading option or spare parameter

PL-399 4 – 6

SECTION V

FUNCTIONAL

Transceiver

The HydroRanger I transceiver will transmit 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 and the CABLE LOE message does not work.

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). Submergence detection (P-23) does not work with a long pulse.

Transducer

The HydroRanger I is designed to work in conjunction with the ST-H series of transducers with integral temperature sensor.

The transducer converts the electrical energy of the transmit pulse from the transceiver into acoustical energy and converts the acoustical energy of the echo back into electrical energy for the transceiver receive period.

The effective acoustical energy is generated from the face of the transducer and is radiated outward, decreasing in amplitude at a rate inversely proportional to the square of the distance. Maximum power is radiated axially (perpendicular) from the transducer face in a line referred to as the axis of transmission. Where power is reduced by half (-3 dB), a conical boundary defining the sound beam, centered about the axis of transmission is established. The diametric measurement of the cone in degrees defines the beam angle and varies according to the transducer type.

Impedance matching is used to optimize the transfer of power from the transducer into air and from the air back into the transducer.

Damping and Process Rate

The HydroRanger I provides damping to control the maximum rate of change of the displayed material level, volume or flowrate 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 (e.g. 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 process rate display

PL-399 5 – 1

parameter, P-70 or by pressing the “7" calibrator key while in the RUN mode. The amount of P-68 and P-69 damping 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 calibrate 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.

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 HydroRanger I and the integral ST-H 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: 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 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 HydroRanger I instead of using the remote sensor input by one of the following methods:

1. » set 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 jumper ‘J2’ to ‘TS/P65’

» insure that the temperature sensor input TB1 - 5/6 is left open/unconnected

PL-399 5 – 2

» select P - 61

» perform an empty calibration

The following temperature functions (in °C) can be viewed:

P-65 air temperature: » present temperature at sensor

» preset temperature, if sensor not used

P-66 max. air temperature: » highest temperature encountered

during operation

P-67 min. air temperature: » lowest temperature encountered

during operation

Sound Velocity

The HydroRanger I can be calibrated to compensate for transducer operation in homogenous 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 HydroRanger I then calculates the sound velocity by comparing the entered physical measurement to its own ultrasonic measurement (empty calibration, P-61).

P-63, velocity at 20°C, can be used to enter the known velocity at 20°C of sound in a particular gas or vapour or 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 at the temperature of P-65 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 Appendix I, 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 that interferes with the processing of the true 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 (refer to Figure 6) 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 (refer to Section VIII) and may be overcome by increasing the near blanking.

PL-399 5 – 3

ringing

typical receiver signal

true echo

(level)

false echo

end of

transmit

P-5

near blanking

empty distance to transducer

P -3

range

level

far end

blanking

range extension (P-87)

as % P-3

typical processed signal

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 the 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 measurement’s reliability and accuracy. As range extension is factory

set for 20% of P-3, 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/or velocity compensation are 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 HydroRanger I 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.

PL-399 5 – 4

Agitator discrimination, however, slows down the HydroRanger I’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.

Note: Agitator discrimination will not work if the blades are stationary and in the transducer’s beam path.

Relays

General

Five on board multi-purpose relays are provided on each HydroRanger I. Each relay may be assigned to one out of thirteen functions, except relay 5 which has the added scanner function for differential level operation. Each relay has a corresponding status LED which is visible through the front cover. For ease of reference, the functions have been divided into three groups:

•

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 at the end of this sub-section.

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.

Functions

level: » in high alarm or pump down, the function goes on when

level rises to the ON setpoint and goes off when the level lowers to the OFF setpoint. In low alarm or 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.

in bounds: » the relay will be in alarm if the level is inside the zone be-

tween the setpoints.

out of bounds: » the relay will be in alarm if the level is outside of the zone

between the setpoints.

differential: » the high alarm or pump down function goes on when differ-

ential level increases to the ON setpoint and goes off when the differential level decreases to OFF setpoint. The low alarm or 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.

PL-399 5 – 5

pump control: » refer to Section VI, Pump Control Application. Select func-

tion option 8, 9 or 10 and press “*” to scroll through the loss of echo defaults. For options 9, pressing “*” will also scroll through the cumulative, ratio or duty/back-up mode of pump operation.

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,

de-energized under loss of echo

totalizer and samplers:

» refer to Section VI, Pump Totalizer and OCM applications.

Relays are normally de-energized, contact closure is approximately 200 mSec duration.

scanner: » this function is specific to relay 5 and the DLD mode of op-

eration. The transducer hot is wired to the common terminal of the relay so that when switched, the transceiver may alternately access transducer #1 and #2. Refer to Section VI, Differential Level application and Figure 3.

Setpoints

If the

setpoint is higher than the

•

high alarm

•

pump down control

•

high differential alarm

setpoint, the relay will function as a:

OFF

If the

PL-399 5 – 6

setpoint is lower than the

•

low alarm

setpoint, the relay will function as a:

OFF

•

pump up control

•

low differential alarm

The common to other relays. The deadband or hysteresis is the difference between the and

2 % of span from each setpoint.

and

setpoints. For ‘in bound’ and ‘out of bounds’ relay functions, the hysteresis is

OFF

setpoints can not be the same on an individual relay but may be

OFF

The setpoints for level alarm functions 1 - 4 and pump control functions 8 - 10 are always entered in the P-1 units of measurement selected (

but not %)

. The setpoints are measured from the bottom up, referenced to zero or empty except for the differential functions, 4 and 10. There the setpoints represent the absolute differential between levels, regardless of the level with respect to zero.

Relay status - non run modes

When the fail-safe timer expires, pump control relays respond as previously described. However, alarm relays will respond in the following manner.

FAIL-SAFE MODE

P-74

fail-safe high on

fail-safe low off

RELAY STATUS

high alarm low alarm

off

fail-safe hold hold

hold

Upon entering the CALIBRATE mode, all pump control relays will be turned OFF. Alarm relays will hold their prior status, but will respond to measurements take when “MEAS” is pressed.

Simulation

Parameters P-76 through P-78 can be used to simulate relay operation in the CALIBRATE mode. Pump relays will be held OFF during simulation, however their corresponding LED’s will respond. Remote totalizer and flow sampler relay operation do not apply to simulation. Refer to Section VII.

NOTE

If the relay status can affect plant operation or personnel safety, it is advisable to override the relay functions or disconnect the relay wiring during calibration or simulation.

KEEP POWER DISCONNECTED

AT MAIN BREAKER WHEN

HydroRanger I COVER IS OPENED

PL-399 5 – 7

It should be noted that some relay functions can not be used in certain modes of operation. The following table shows the valid relay functions for the five modes of operation.

Relay Function Vs Mode Of Operation

Mode of Operation

Function Material Space DLD Pump Vol. OCM

(P2 = 1) (P2 = 2) (P2 = 3) (P2 = 4) (P2 = 5)

0 off off off off off

1 level level level level level

2 in bounds in bounds off in bounds in bounds

3out of

bounds

4 off off differential

out of

bounds

off out of

bounds

off off

out of

bounds

level

5 rate rate off rate rate

6 temp. temp. temp. temp. temp.

7 L.O.E. L.O.E. L.O.E. L.O.E. L.O.E.

8 pumppumppumppumppump

9 sequential sequential off sequential sequential

10 off off pump on

off off

differential

11 off off off totalizer totalizer

12 off off off flow

sampler

13 time

sampler

time

sampler

time

sampler

time

sampler

flow

sampler

time

sampler

14 off off scanner off off

PL-399 5 – 8

PL-399 5 – 9

Analog Output

The HydroRanger I can be programmed to provide an analog output (P-6) of 0 or 4 - 20 mA, proportional or inverse span.

The 4 and 20 mA levels can be trimmed slightly via P-97 and P-98 respectively to compensate for any offset between the HydroRanger I and the customer’s equipment.

The analog output feature may be turned OFF by setting P-6 = 0. The output and

alternate displays ( & P-92) will immediately drop to 0 mA after a new

measurement is processed. The output will remain disabled during simulation (P-76, 77

& 78). However, the test routine of P-92 and the trim parameters will remain active. If

0, then the analog output will return to its programmed output after a new

≠

P-60 measurement is processed.

If the analog output must be isolated, the optional mA isolator Model LIs-1 must be mounted on the motherboard and wired per Figures 2 and 3. When using the isolator the load adjust can be done via P-97 and 98 rather than via the load adjust potentiometer as mentioned on the isolator instruction sheet, PL-293.

The current output responds in the following manner:

MODES

CURRENT

OUTPUT

Responds

P2=1

LEVEL

material

level

P2=2

SPACE

material

distance

P2=3 DLD.

differential (if P-32 = 1 )or level on xdcr 1

(if P-32 =2)

P2=2

VOLUME

volume

P2=4

PUMP TOTAL

level

(if P-34=0)

or volume

(if P-34≠0)

P2=5 OCM

head 1

(if P-50=1)

flow

(if P-50=2)

if P-6=1 or 2, reads 20 mA

when

if P-6=3 or 4, reads 20 mA

when

PL-399 5 – 10

full

empty

full

maximum

differential

or level

differential

or level

full

empty

full

empty

at max.

head

or flow

at 0

head

or flow

SECTION VI

APPLICATIONS

Application Page

Simple Level 6 — 2 Pump Control 6 — 6 Pump Totalizer 6 — 12 Volume 6 — 16 Differential Level 6 — 24 OCM 6 — 28 Standpipes 6 — 44

This section highlights the most common applications for which the HydroRanger I is designed. When calibrating, refer to the application which most suits your

requirements.

A practical example has been given to further illustrate the calibrating features used for an application. In actual practice, however, the example may not cover all facets of the particular application. Therefore, the user should become familiar with all of the available parameters.

For ease of reference and programming, parameters have been organized into groups relating to their function or application.

P-0 security P-1 to P-7 general P-8 to P-22 relays P-23 to P-33 pump control P-34 to P-39 volume and display conversion P-40 to P-50 OCM P-51 to P-59 OCM and pump totalizer P-60 to P-67 custom calibration P-68 to P-75 filters P-76 to P-78 measurement and display P-79 to P-88 echo processing and analysis P-89 to P-98 testing

P-99 master reset Parameter information can be obtained through Section VII, Parameter Description or via Appendix III, Parameter Listing.

As the minimum distance from the transducer face to the target

is approx. 30 cm (1 ft.), near blanking (P-5) can be set up to a

minimum distance of 30 cm (1 ft.).

PL-399 6 – 1

Simple Level Application

The most common application of the Milltronics ultrasonic level measuring systems is for simple level monitoring, whereby the material level or space measurement is displayed. This may or may not include alarms and mA output.

When in the calibrate mode, alarm relays will remain in their prior state. However, they will respond to measurements taken when “MEAS” is pressed.

Example 1

The application is to obtain a level measurement and corresponding 4 - 20 mA output of a 30 ft. high vessel. The transducer face is level to the top of the vessel, the empty level will be at 0 ft. (bottom) and the full level will be at 28 ft. from the bottom (span). A high alarm is required at 4 ft. from the top (26 ft. from the bottom) and a low alarm is required at 5 ft. from the bottom. The maximum filling rate is 1 ft./min. The maximum emptying rate is 1 ft/min, a rate greater than this should set an alarm. In the event of a loss of echo, the HydroRanger I is to go into fail-safe hold after 2 minutes.

select:

P-1 enter option “3”, units in feet

advance to:

P-2 enter option “1”, material level

P-3 enter “30”, empty distance to transducer

P-4 enter “28”, span

P-5 enter “2”, blanking distance, 30’ - 28’ = 2’

P-6 enter option “2”, 4 - 20 mA output

P-7 enter “2”, display max. 2 digits after decimal

P-8 enter option “1”, relay 1 - alarm function

P-9 enter “26”, relay 1 - alarm ON

(30’ - 4’ = 26’)

P-10 enter “25.5”, relay 1 - alarm OFF

deadband = 0.5’, arbitrary setting

P-11 enter option “1”, relay 2 - alarm function

P-12 enter “5”, relay 2 - alarm ON P-13 enter “5.5”, relay 2 - alarm OFF

PL-399 6 – 3

P-14 enter option “5”, relay 3 - rate of change function

P-15 enter “-1”, relay 3 - alarm ON

P-16 enter “-0.9”, relay 3 - alarm OFF

P-37 enter “1”, convert display (x1)

P-68 enter “1”, max. fill damping 1 ft/min

P-69 enter “1”, max. empty damping 1 ft/min

P-74 enter option “3”, fail-safe hold

P-75 enter “2”, fail-safe timer - 2 min.

press:

RUN CAL

to re-enter run mode

PL-399 6 – 4

Pump Control Application

The basic difference between a simple level application and a pump control application is that

are energized when pumping is required.

The HydroRanger I can be programmed to control up to 5 pumps, each in one of the following ways.

1. fixed roster: (P-8,11,14,17 & 20 = 8)

2. sequential operation:

the relays assigned to pump functions are normally in a de-energized state and

selected pump relays 1 - 5 always operate in conjunction with their respective relay setpoints. i.e. relay 1’s operation is always subject to relay 1 setpoints (P-9 & P-10). Any combination of the selected pumps can be operating at a time.

• cumulative (P-8,11,14,17 & 20 = 9)

selected pump relays 1 - 5 sequentially rotate through the associated relay setpoints changing pump/setpoint assignment each time the lead pump is turned off. The lead pump is defined as the pump responding to the first on setpoint.

• duty/back-up: (P-8,11,14,17 & 20 = ’9)

similar the to cumulative sequential loop except that only one of the pumps designated as duty/back-up can be on at a time. This feature is useful in older installations where the discharge main can not tolerate excessive pressure. If the lead pump, through wear or blockage, can not keep up with the inflow, the next pump in sequence will come on and the lead pump will be turned off. The ON setpoints are generally in close proximity, but the OFF setpoints must be common for all pumps on the loop.

• ratio: (P8, 11 14 17 & 20 = A9)

assignment of a pump/relay contact to a setpoint parameter is done by ratio of the logged service hours relative to the allocated ratio as set by parameter P-24 through P-28. When a pump is required, the pump with the least amount of service hours (C-24 to 28) is started. When a pump is not required, the pump with the most hours of service is stopped.

e.g. relay 1,2 and 3 control three pumps by service ratio. It is required that

pump 1 operate 60% of the time, pump 2 operate 10% of the time and pump 3 operate 30% of the time. set the relay function : P-8, 11, 14 = dE:A9 set the relay setpoints : P-9/10, 12/13, 15/16 set the P-24, 25, 26 ratios : A-24 = 60, A-25 = 10, A-26 = 30

PL-399 6 – 7

NOTE: sequential operation can be programmed as either cumulative,

duty/back-up or ratio, but not more than one The HydroRanger I will take the last mode entered as the common choice for all sequenced relays.

Relays assigned to pump control operation are software set that no two pumps can start up within 10 seconds of each other, a power failure or return to the RUN mode.

When in the calibrate mode, pump relays will be held de-energized (OFF). In the event of a loss of echo condition, the pump relays can be individually programmed to be:

•

de-energized (dE)

•

energized (En)

•

hold (Ho)

when the fail-safe timer P-75 expires. Refer to Section V, relays.

The mA output, however, will remain at its prior value but will respond to measurements taken when “MEAS” is pressed.

In applications where flooding is possible, the transducer should be fitted with the optional submergence coupling. The coupling creates a cavity of trapped air that insures that a high level reading will be maintained rather than a loss of echo condition when the liquid level reaches the transducer.

In addition, parameter P-23 must be set

to accommodate this feature.

P-24 through P-28 are multi-level parameters related to the respective relays (1-5) when assigned to a pump control function. The parameter levels are accessed by pressing "*" and are identified in the display as ‘P’, ‘C’ and ‘A’.

P - : log of the pump service hours C - : log of the number of pump starts

The ‘P’ and ‘C’ levels may also be viewed while in the run mode by pressing the respective "PUMP" keys. The initial pressing of the key causes the display to show the service hours. Holding the key in for at least five seconds causes the number of starts to be displayed. Each log may be reset to 0 by pressing "CLR" and then "ENTER" or preset to a particular value. The preset value is immediately stored in memory, however subsequent values are only stored every 4 hours. Thus, after a power failure, the logs will display last value stored. The logs automatically reset to 0 after reaching a value 9,999.

A - : ratio setting for sequential / ratio pump control.

Refer to Figure 6.

Example 2

The application is to control the level in a wet well 3 meters deep. It is required that:

•

the level be displayed in meters

PL-399 6 – 8

•

to start/stop two constant speed pumps start pump 1 at 1 m level start pump 2 at 2 m level stop both pumps at 0.5 m level

•

two pumps operate on a cumulative sequential loop, de-energized under loss of echo

•

low alarm be set at 0.4 m to protect the two pumps from cavitating

•

the transducer be mounted 3.3 meters from the bottom of the wet well

•

the span of level in the well be 3 m

•

max. fill rate be 1 m/min, max. draw rate be 0.2 m/min

•

in the event of loss of echo, go into fail-safe low after 30 seconds to protect pumps

•

the transducer be the submersible type as there is possibility of flooding

select:

P-1 enter option “1”, units in meters

advance to:

P-2 enter option “1”, material level P-3 enter “3.3”, empty distance to transducer P-4 enter “3”, span P-5 enter “0.3”, near blanking distance, 3.3 m - 3.0 m = 0.3 m P-7 enter “2”, display max. 2 digits after decimal

P-8 press and then until “ d E 9” is displayed

enter option “dE 9”, relay 1 - pump function P-9 enter “1”, relay 1 - pump ON P-10 enter “.5”, relay 1 - pump OFF

P-11 press and then until “dE 9" is displayed

enter option “dE 9”, relay 2 - pump function P-12 enter “2”, relay 2 - pump ON P-13 enter “0.5”, relay 2 - pump OFF P-14 enter option “1”, relay 3 - alarm function P-15 enter “0.4”, relay 3 - alarm ON P-16 enter “0.45”, relay 3 - alarm OFF

deadband = 0.05 m, arbitrary setting P-23 enter option “1”, using submersible transducer P-37 enter “1”, convert display (x1) P-68 enter “1”, fill damping 1 m/min

PL-399 6 – 9

P-69 enter “0.2”, empty damping 0.2 m/min P-74 enter option “2”, fail-safe low to protect pumps P-75 enter “.5”, fail-safe timer

at a max. draw rate of 0.2 m/min, this would protect pumps. If a loss of echo occurred at 0.5 m, after 30 sec. level would equal that of acceptable low level alarm and pump would shut off.

press:

RUN CAL

to re-enter run mode

Pump Run-on

Pump run-on is a special feature designed to allow the pump assigned, temporarily (sequential loop) or permanently (fixed roster), to the lowest OFF setpoint to continue pumping after it has reached that OFF setpoint. The duration of run-on is set by P-30. Only one run-on duration is allowed per interval. The interval is the time period set by P-29 which begins upon return to the run mode or resumption of power. No run-on is allowed during the first interval.

CAUTION

EXTENDED PUMP RUN-ON CAN LEAD TO CAVITATION,

CAUSING AIR LOCK OR PUMP DAMAGE

Conditions of use:

•

Do not use run-on feature during pump-up operation as an overflow condition may occur. Set P-29 and 30 to 0.

•

Select the loss of echo default “dE” to protect pumps from cavitating in the event of loss of echo.

•

The run-on interval must be greater than the run-on duration.

e.g. P-29 = 24 and P-30 = 15

After 24 hours from going into the run mode, the HydroRanger I enters the second run-on interval allowing only one pump run-on cycle of 15 seconds, at the first time the lead pump turns off. If the lead pump turns off a second time during that 24 hour interval, no run-on will occur. After the 24 hour interval has elapsed, whether a pump run-on has occurred or not, the next run-on interval will begin, allowing one run-on cycle.

PL-399 6 – 10

Pump Totalizer Application

This type of application is an extension of the pump control application, accessed by setting P-2 = 4. Unlike a pump application, in which the mode of the measurement (P-2) can be of material or space, the pumped volume totalizer mode is a measurement of the liquid volume pumped with reference to the material level.

The material level must be converted to volume using volume conversion parameters P-34, 35 and 36 and/or convert display P-37. The HydroRanger I in pump-down, will record the volume being pumped out. Alternately, the HydroRanger I will record the volume pumped in if the pump setpoints are set for pump-up.

When the pump(s) is OFF, the HydroRanger I estimates the volume of the inflow or discharge by recording the rate at which the liquid level changes. When the pump(s) is operating, the estimated inflow or discharge volume may be added (P-33 = 1) to the pumped volume to obtain the net volume pumped during the pump cycle or omitted (P-33 = 2) from the pumped volume total, such as in batch processing.

When the pump(s) stops, the pumped volume of the previous pump cycle is added to the total volume pumped in the 8 digit totalizer.

The totalizer contents are stored in RAM and will be lost in the event of a power failure. However, after every 1 hour of continuous operation, the totalizer contents are stored in the EEPROM. Thus, after a power failure, the totalizer will be loaded with the last value stored.

In the event of a loss of echo, the totalizer will continue being incremented by the flowrate established from the last valid echo. If the fail-safe timer expires (’LOE’ is displayed) or when in the calibrate mode, the totalizer will stop being incremented and hold its last updated value. Once the totalizer has been filled (99999999), it will automatically reset itself to zero and resume totaling.

The HydroRanger I can be calibrated (P-39) to normally display one of the following readings:

•

enter option “0”, hold last reading selected in run mode

•

enter option “1”, high total: 4 highest digits of the 8 digit totalizer

•

enter option “2”, low total: 4 lowest digits of the 8 digit totalizer

•

enter option “5”, level

It must be noted that only half of the totalizer digits can be accessed or viewed at one time.

e.g. high total low total

P-54 P-55

8 digit total 1 3 2 5 4 7 6 9

PL-399 6 – 13

If it is wished to momentarily view an alternate reading while in the RUN mode and P-39

≠

0, press the desired calibrator key (3 - HEAD and 4 - FLOW are not applicable to the

pumped volume totaling)

e.g. - normal reading is high total, P-39 = 1

- to momentarily view low total, press

#### low total, is momentarily displayed

#### normal reading, high total is returned

If P-39 = 0, alternate readings cannot be momentarily displayed. Pressing the desired key will change the display and hold it there until the next alternate reading is selected.

In the calibrate mode, the high and low totals can be viewed or preset to any value by P-54 and P-55 respectively.

The pumped volume readings (high and low total) may be scaled down by factors of 10 (P-52) to slow down the totalizer’s rate of fill and its decimal point (P-53) positioned for the resolution required. If it is desired to change the scaling factor or decimal point location after totaling has begun, record the high and low totals and reset the totalizer to zero.

Further to alarm and pump functions, relays may be programmed to act as a momentary contact closure for a remote totalizer, flow sampler or time sampler (refer to section V, Relays). The duration of a momentary contact closure is 200 mSec for which the corresponding relay status LED will flash. As a remote totalizer relay, the contact is closed each time the displayed total is increased by the amount entered into P-56. As a flow sampler relay, the contact is closed each time the volume of liquid as set by P-57 and P-58 is pumped. As a time sampler relay, the contact is closed at the rate of the time period entered into P-59.

The mA output responds to the liquid reading (level, if P-34 = 0 or volume, if P-34 only. In the event of fail-safe due to loss of echo, the mA output will respond as programmed by P-6 and P-74, but the totalized volume will hold its last reading.

Refer to Figure 6.

PL-399 6 – 14

≠

Example 3

Further to example 2 it is required that the volume pumped be totalized. A daily flow total of 1,200 cubic meters is expected and a contact closure is required every 10 cu. m. The full level of the well is equal to 42 cu. m. The following parameters should be set.

select:

P-2 enter option “4”, volume totalizer

P-17 enter option “11”, relay 4 - remote totalizer contact

P-33 enter option “1”, estimated inflow volume is added to pumped volume

P-37 enter “14”, convert display (x14)

42/3 = 14

P-39 enter option “2”, display low total

P-52 enter “1”, totalizer convert display, totalized volume will read as tens of

cubic meters or 1 count per 10 cubic meters.

P-53 enter option “0”, totalizer decimal point no decimal digits or resolution

equals 100% of a count

P-54 press

CLR

enter “0”, totalizer preset value, arbitrarily chosen

P-55 press

CLR

enter “0”, totalizer preset value arbitrarily chosen

P-56 enter “1”, totalizer contact control - closure every 10 cu. m

press

RUN CAL

to re-enter run mode.

PL-399 6 – 15

Volume Application

In addition to simple liquid level and pump applications, volume conversions can be included in the calibration.

Common Tank Shapes

Volume conversion is provided for 8 common tank shapes, (P-34). Dimensions are entered using P-4, 35 and 36. Volume is displayed as 0 - 100% and may be converted to volume units using P-37.

Note that P-4, span, must equal 100% (full) level of tank.

Example 4

The application is to measure the volume of glue in a horizontal tank with parabolic ends. The tank manufacturer’s specifications state that the total volume is 40.6 cubic meters.

1 m

transducer

man hole

0.5 m

3 m = Span, P-4

(must equal height of tank)

A = 0.75 m

L = 5 m

The maximum fill/draw rate is 0.35 cu. m/min. In the event of a loss of echo, the HydroRanger I is to go into fail-safe high after 30 sec.

select:

P-1 enter option “1”, units in meters

advance to:

P-2 enter option “1”, material level

P-3 enter “3.5”, empty distance to transducer

PL-399 6 – 17

P-4 enter “3”, span (inside diameter of tank)

P-5 enter “.5”, near blanking distance, 3.5 m - 3.0 m = 0.5 m

P-7 enter “1”, display max. 1 digit after decimal

P-34 enter option “7”, tank shape for volumetric conversion

P-35 enter “.75”, tank dimension A

P-36 enter “5”, tank dimension L

P-37 enter “.5”, convert (x 0.5)

automatically show the levels in %. As 100% full = 40.6 cubic meters, a conversion factor of .406 must be entered.

actual volume = conversion factor percentage

P-68 enter “10”, fill damping 10 m/min

50 cu. m = 143 min total fill time

0.35 m/min.

3 m = 0.021 m/min average fill rate 143 min.

However, because of the tank’s shape, the top and bottom levels will fill faster than the middle section. Therefore the actual P-68 value should be greater than the average value. Typically, the factory set damping of “10” can be used.

P-69 enter “10”, empty damping - same as fill damping rate

P-74 enter option “1”, fail-safe high

P-75 enter “0.5”, fail-safe timer, 30 sec.

press:

RUN CAL

to re-enter run mode.

PL-399 6 – 18

Custom Design Tanks

Where the tank design does not match one of the eight common tank shapes, P-34 may be programmed for level versus volume characterization.

Characterization is achieved by entering the level and corresponding volume for the elevations where there is a change in the tank profile. Where curves are involved, the more breakpoints that are defined, the more accurate will be the volume measurement. A maximum of eleven breakpoints can be defined.

Level data is entered in the linear units selected (P-1) and volume data is entered in the desired volumetric units. Both of these are referenced to the bottom to the tank.

By setting P-34=9, the H-# and F-# co-ordinates, where:

H = level data

F = volume data

# = breakpoint 1 to 11

may be alternately accessed for the selected breakpoint by successively pressing .

∗

Breakpoints are selected by entering the desired breakpoint number or by pressing

the or key. When the desired coordinate has been selected, the entry field

↑

is accessed by pressing . and the level or volume is entered.

↓

ALT

DISP

To end programming of H and F co-ordinates, press CLR while H-# or F-# is being displayed.

Example 4a

The application is to measure the level of liquid in a custom design tank. The tank manufacturer specifies the following level vs. volume data.

select:

transducer

158.9 m3 @ 6 m

58.42 m3 @ 4 m

29.12 m3 @ 3 m

P-3

6.5 m

P-4 6 m

4 m3 @ 1 m

0 m3 @ 0 m

P-1 enter option "1", units in metres

PL-399 6 – 19

advance to:

P-2 enter option "1", material level

P-3 enter "6.5", empty distance to transducer

P-4 enter "6", span

P-5 enter ".5" near blanking distance

P-34 enter option "9" universal level vs. volume

press display will show or enter *H-1 ALT. DISP. ---00 ENTER 0.000

H-2

↑ ---1 1 ENTER 1.000 ↑ H-3

---3 3 ENTER 3.000 ↑ H-4

---4 4 ENTER 4.000 ↑ H-5

---6 6 ENTER 6.000 * F-5

---ALT. DISP. F-5 1 F-1 ALT. DISP. ----

PL-399 6 – 20

0 0

ENTER 0.000

F-2

----

4 4

ENTER 4.000

↑ F-3

----

29.12 29.12

ENTER 29.12

↑ F-4

----

58.42 58.42

ENTER 58.42

↑ F-5

----

158.9 158.9

ENTER 158.9

ALT. DISP. F-5

CLR P-40

press:

RUN

CAL

to re-enter run mode

Compensation

In many volume applications, the ambient atmosphere is other than air or at a temperature other than 20°C. Refer back to Temperature or Sound Velocity, Section V, for details on compensating for such circumstances.

If it is noted that the HydroRanger I reading is consistently off by a constant amount as compared to the physical reading, this may be compensated for by P-62. This measurement offset might occur when P-3 or P-4 does not exactly match the tank dimensions referenced for volume conversion. If the cause of the offset appears below the relay setpoints, the setpoint parameters may need to be reset as these will have shifted accordingly.

Refer to Figure 7.

Example 4b

NOTE Further to Example 4 or 4a, the liquid is a glue giving off formaldehyde

vapor. A velocity compensation will be required.

As the next two steps involve physical level measurements, for

convenience sake, P-60 can be done before P-61.

PL-399 6 – 21

select:

P-62 (optional to P-60) record present offset for reference

P-60 (optional)

with the tank as full as permissible, without going into the blanking zone,

press

MEAS

the HydroRanger I will take a measurement and display the level. Press “MEAS” at least 5 times and insure that a stable reading is being obtained.

enter the “physical measurement”, the HydroRanger I will now calculate the measurement offset to be used in future level measurements. The offset reading will be automatically entered into P-62, and can now be viewed.

P-63 record present sound velocity for reference

P-61 with the tank as empty as permissible and filled with its normal vapor and

at its normal temperature (refer to Figure 7),

press

MEAS

the HydroRanger I will take a measurement and display the level in the units selected, regardless that percent, volume or convert display are used. Press “MEAS” at least 5 times and insure that a stable reading is being obtained

enter the “physical measurement”. The HydroRanger I will now calculate the correct sound velocity to be used in future level measurements. The new sound velocity will be automatically entered into P-63 and P-64, and can now be viewed.

press:

RUN

CAL

PL-399 6 – 22

to re-enter run mode

Differential Level Application

This type of application monitors the difference between two liquid levels, hence two transducers are required. The HydroRanger I monitors the two levels, calculates the difference and displays the differential as the reading. The following parameters should be left at their factory setting:

•

volume conversion (P-34)

•

display conversion (P-37)

•

offset (P-62)

•

velocity compensation (P-63)

•

temperature compensation (P-65)

In the run mode, the reading display will show the absolute difference between the levels, hence there are no negative readings. The level at transducer 1 or 2 may be viewed individually by pressing "PT 1" or "PT 2" respectively.

When calibrating as a differential level detector:

•

P-2, mode: option 3 must be selected for DLD operation

•

P-3, empty distance to transducer: represents the lowest or common level

•

P-4, span: represents differential level corresponding to the 20 mA value

•

P-6, mA output: select range

•

P-20, function: option 14 must be selected for relay 5 to operate as scanner

•

P-32, mA output: may be dedicated to correspond to differential or level under transducer # 1

On alarm and pump relay functions with setpoints referenced to zero, the setpoints are common to both levels. The in bounds, out of bounds, rate of change and sequential relay functions are not allowed.

In the event that the echo on either transducer is lost:

•

if set for fail-safe high: the differential reading will display the maximum differential level (P-4)

•

if set for fail-safe low: the differential reading will display zero

•

if set for fail-safe hold: the display will hold its present reading after the fail-safe timer has expired

In order to use the HydroRanger I as a differential level detector, TB-1 must be wired as in Figure 3 and both transducers must be installed at the same level.

Refer to Figure 6 for application notes.

PL-399 6 – 25

Example 5

The application is to monitor the differential level across a sewage bar screen. When a differential level of greater than 12” is obtained, it is required that a rake be started. If the water level on either side rises above 20", a high level alarm is required.

The height from the common (low) level to the transducer face is 4 ft. A 4 - 20 mA output corresponding to the differential is required and the 20 mA level has been arbitrarily set to correspond to a 24" differential (span). In the event of a loss of echo, the HydroRanger I should go into fail-safe high after 5 minutes.

select:

P-1 enter option “4”, units in inches P-2 enter option “3”, differential level P-3 enter “48”, empty distance to transducer P-4 enter “24”, span P-5 enter “16”, near blanking distance, 48" - (12" + 20") = 16" P-6 enter option “2”, 4 - 20 mA output P-7 enter “1”, display max. 1 digit after decimal P-8 enter option “4”, relay 1 - differential alarm P-9 enter “12”, relay 1 - rake on

NOTE: This would be used only to initiate the rake control

circuitry. P-10 enter “6”, relay 1 - reset this value can be arbitrarily set P-11 enter option “1”, relay 2 - alarm function P-12 enter “20”, relay 2 - alarm ON P-13 enter “19”, relay 2 - alarm OFF P-20 enter option “14”, relay 5 - scanner P-32 enter option “1”, mA output on differential P-68 enter “393.7”, fill damping 393.7 in/min. Normally this level would rise over

a period of days or weeks, therefore damping requirements

would be fairly low. Typically, the factory set damping of

32.81 can be used.

P-69 enter “393.7”, empty damping - same as fill damping P-74 enter option “1”, fail-safe high P-75 enter “5”, fail-safe timer

press:

RUN

CAL

PL-399 6 – 26

to re-enter run mode

OCM Application

This application is specific to monitoring the flowrate in one of the four following categories of primary measuring devices. Refer to the respective drawings at the end of this section for weir and flume outlines and transducer location.

Single Exponential, these are flumes and weirs that can be characterized by a single exponential term (P-40 = 1).

i.e.: Q = K H where Q = flow

Examples: Primary measuring device exponent Suppressed rectangular, Cipolletti weir, or Venturi flume 1.50 Parshall Flume, or Leopold Lagco 1.55 V-notch weir 2.50

etc.......

NOTE: Refer to manufacturers specifications for the exact exponent.

K = constant H = head X = exponent, characteristic to the primary

measuring device (flume or weir)

The exponents listed above are for reference only.

Palmer-Bowlus flumes, specifically those manufactured by Plasti-Fab or Warminster Fiberglass (P-40 = 2).

H-flumes, excluding HS and HL sizes, as developed by the U.S. Department of Agriculture, Soil Conservation Service (P-40 = 3).

Other, these are primary measuring devices that do not fit the first three categories (P-40 = 4).

As most OCM applications are outdoors, the use of a temperature sensor is strongly recommended for optimum accuracy. If a temperature sensor is not used, the expected error due to temperature variations will increase from 0.01 to 0.17% per celsius degree over the operating range (P-3).

Flow readings are calculated by the HydroRanger I as a function of the head under the transducer, installed upstream from the primary measuring device (P-40). The flows are then accumulated in the arbitrary volume units chosen per the time units of P-41 in an 8 digit totalizer. In the event of a loss of echo, the totalizer will continue being incremented by the flowrate established from the last valid echo. If the fail-safe timer expires (’LOE’ is displayed) or when in the calibrate mode, the totalizer will stop being incremented and hold its last updated value.

The totalizer contents are stored in RAM and will be lost in the event of a power failure. However, after every 1 hour of continuous operation, the totalizer contents are stored in

PL-399 6 – 29

the EEPROM. Thus, after a power failure, the totalizer will be loaded with the last value stored.

Once the totalizer has been filled (99999999), it will automatically reset itself to zero and resume totaling.

The HydroRanger I can be calibrated (P-39) to normally display one of the following readings:

•

enter option “0”, hold last reading selected in run mode

•

enter option “1”, high total: 4 highest digits of the 8 digit totalizer

•

enter option “2”, low total: 4 lowest digits of the 8 digit totalizer

•

enter option “3”, head

•

enter option “4”, flow

It must be noted that only half of the totalizer digits can be accessed or viewed at one time.

e.g. high total low total

P-54 P-55

8 digit total 1 3 2 5 4 7 6 9

If it is wished to momentarily view an alternate reading while in the RUN mode and P-39

≠

0, press the desired calibrator key (* - READ is not applicable to OCM).

e.g. - normal reading is high total, P-39 = 1

- to momentarily view low total, press

#### low total, is momentarily displayed

#### normal reading, high total is returned

If P-39 = 0, alternate readings cannot be momentarily displayed. Pressing the desired key will change the display and hold it there until the next alternate reading is selected.

In the calibrate mode, the high and low totals can be viewed or preset to any value by P-54 and P-55 respectively.

The flow readings (high and low total) may be scaled down by factors of 10 (P-52) to slow down the totalizer’s rate of fill and its decimal point (P-53) positioned for the resolution required. If it is desired to change the scaling factor or decimal point location after totaling has begun, record the high and low totals and reset the totalizer to zero.

The HydroRanger I can be programmed to ignore low head, i.e. flows for heads less than that set in P-48 will not be accumulated into the totalizer. The low head cutoff is measured in % of maximum head (P-45).

Further to alarm and pump functions, relays may be programmed to act as a momentary contact closure for a remote totalizer, flow sampler or time sampler (refer to

PL-399 6 – 30

Section V, Relays). The duration of a momentary contact closure is 200 mSec for which the corresponding relay status LED will flash. As a remote totalizer relay, the contact is closed each time the displayed total is increased by the amount entered into P-56. As a flow sampler relay, the contact is closed each time the volume of liquid as set by P-57 and P-58 is pumped. As a time sampler relay, the contact is closed at the rate of the time period entered into P-59.

The mA output responds to the head or flow (P-50). In the event of fail-safe due to loss of echo, the mA output will respond as programmed by P-6 and P-74.

When calibrating the HydroRanger I for the OCM function, the empty distance to transducer (P-3) may be considered and entered as the distance from the transducer face to the 0 head or no flow reference level. If this measurement is not easily obtained, P-3 can be estimated and corrected via P-47 . This is referred to as the Auto Zero calibration and requires the HydroRanger I to compare a physical measurement (from wall gauge, dipstick or stilling well) to the ultrasonic measurement via P-47. Refer to Example 6a.

It should also be noted that when operating in the OCM function: percent display, volume conversion (P-34) and convert display (P-37) are inoperative. Empty calibration (P-61) must be clear, i.e. 4 hyphens in the display.

Example 6

9" Parshall Flume

Q = 1.98 H

1.53

where Q = flow rate, MGD (million gallons per day)

H = head, feet

- max. flow rate - Q max. = 4.112 MGD = 4,112,000 gal./day

- max. head - H max. = 1.61

- transducer is mounted 3 ft above the zero flow level

- max. flow rate display = 4,112 i.e.: one count = 1000 gal.

select:

P-1 enter option “3”, units in inches

P-2 enter option “5”, OCM

P-3 enter “3”, zero level distance to transducer

P-4 enter “1.61”, max. head

PL-399 6 – 31

P-5 enter “1”, near blanking distance, minimum allowable

P-39 enter option “4”, display flowrate in units per day

P-40 enter option “1”, primary measuring device - exponential

P-41 enter option “4”, flowrate time units - per day

P-42 enter “1.53”, exponent from manufacturer’s specs. for 9" Parshall Flume

P-46 enter “4112”, max. flow in thousand gal./day

P-49 enter option “3”, flowrate decimal point display max. 3 digits after decimal

P-52 enter option “0”, totalizer convert display total is divided by 1 before being

displayed or 1 count per thousand gallons

P-53 enter option “2”, totalizer decimal point display 2 digits after decimal or

resolution equals 1/100th of a count

P-68 enter “32.81”, fill damping 32.81 ft/min As the head would fluctuate over a

period of hours, damping requirements would be fairly low. Typically, the factory set damping of 32.81 can be used.

P-69 enter “32.81”, empty damping - same as fill damping

Example 6a

(Auto Zero)

Further to Example 6, the following is required:

•

alarms at 10% overflow (approx. = 1.8 ft) and 0 head

•

in the event of loss of echo, the HydroRanger I is to go into low alarm after 45 sec.

•

head to read to 1 decimal place

•

sampler contact every hour

•

head under 1" (40 thousand gal./day) not be totalized

•

4-20 mA output to respond to flow

PL-399 6 – 32

select:

P-3 enter “3.33” estimated empty distance to transducer

P-6 enter option “2”, 4 to 20 mA

P-7 enter option “1”, decimal location for head display max. 1 digit after decimal

P-8 enter option “1”, relay 1 - alarm function

P-9 enter “1.8”, relay 1 - alarm ON

P-10 enter “1.5”, relay 1 - alarm OFF

P-11 enter option “1”, relay 2 - alarm function

P-12 enter “0”, relay 2 - alarm ON

P-13 enter “.3”, relay 2 - alarm OFF

P-14 enter option “13”, relay 3 - time sampler contact

P-47 Auto Zero

press

CLR ENTER

and then 4 hyphens must appear in the display

press

MEAS

at least 5 times to insure that the HydroRanger I will obtain a stable

ultrasonic measurement. The resultant reading will be the

with respect to the

estimated P-3 = 3.33 ft.

Enter “physical head measurement”, over the displayed value previously obtained. This is the true head measurement from a wall gauge, dipstick or stilling well, taken at the same time as the ultrasonic measurement and representing the same head measurement point as seen by the transducer. The physical head measurement must not be in the near blanking zone. An offset value, which is the apparent head minus the true head, is automatically calculated and entered into P-62. P-62 can only be cleared by P-47.

apparent head

P-48 enter “5.2”, low head cutoff is 5.2% of P-45. Flow for head

below 1" (40 thousand gal./day) will not be totalized

1" = 0.052 = 5.2%

12"/ft x 1.61 ft

PL-399 6 – 33

P-50 enter option “2”, mA output responds to flow

P-59 enter “1”, time sampler control closure once every hour

P-74 enter option “2”, fail-safe low

P-75 enter option “.75”, fail-safe timer, 45 sec.

PL-399 6 – 34

SINGLE EXPONENTIAL, P-40 = 1

Weirs

transducer location

3 to 4 h

max

Applicable Weir Profiles

near blanking (P-5) min. 0.3 m (11.81")

crest profile

v-notch or

triangular

suppressed

rectangular

Non-Applicable Weir Profiles

contracted

rectangular

compound approximate

Flows through these weirs may be measured using the universal head vs.

flow characterization, P-40=4

PL-399 6 – 35

cipolleti or

trapezoidal

Poebing

sutro or

proportional

exponential

SINGLE EXPONENTIAL, P-40 = 1 (cont’d)

FLUMES

Parshall Flume

2/3 C

plan

transducer

•

sized by throat width

•

set on solid foundation

•

general free flow equation is Q = KH where Q = flow rate

•

for rated flows under free flow conditions, the head is measured at 2/3 the length of the converging section from the beginning of the throat section

K = constant H = head x = exponent

0 head

side

Khafagi Venturi

•

for related flows under free flow conditions, the head is measured 15 cm (6") upstream from the beginning of the converging section

•

position the transducer such that it is centered over the flow at a minimum height of 30 cm (12") above the maximum head.

•

position the transducer such that it is centered over the flow at a minimum height of 30 cm (12") above the maximum head.

converging

throat

15 cm

plan

diverging

transducer

side

0 head

front

PL-399 6 – 36

SINGLE EXPONENTIAL, P-40 = 1 (cont’d)

FLUMES (cont’d)

Leopold Lagco (as manufactured by Leopold Co., Inc.)

•

designed to be installed directly into pipelines and manholes

•

Leopold Lagco may be classed as a rectangular Palmer-Bowlus flume

•

sized by pipe (sewer) diameter

converging

plan

throat

transducer

diverging

•

for rated flows under free flow

point of measurement

conditions, the head is measured at a point upstream referenced to the beginning of the converging section. Refer to the following table.

Flume Size Point of Measurement

(pipe dia. in inches) cm Inches

4 — 12 2.5 1

15 3.2 1-1/4 18 4.4 1-3/4 21 5.1 2 24 6.4 2-1/2 30 7.6 3 42 8.9 3-1/2 48 10.2 4 54 11.4 4-1/2 60 12.7 5 66 14.0 5-1/2 72 15.2 6

side

0 head

front

•

general free flow equation is Q = KH

where Q = flow rate

K = constant H = head x = exponent

•

position the transducer such that it is centered over the flow at a minimum height of 30 cm (12") above the maximum head.

PL-399 6 – 37

SINGLE EXPONENTIAL , P-40 = 1(cont’d)

FLUMES (cont’d)

Cuthroat Flume

•

similar to Parshall flume except that the floor is flat bottomed and throat has no virtual length.

•

refer to manufacturer’s specifications for flow equation and point of head measurement.

Flows through the following flumes may be measured using the universal head vs. flow characterization, P-40=4.

plan

Trapezoidal Flume

•

similar to Parshall flume except that floor is flat bottomed and walls are sloped outward

Dual range (nested) Parshall Flume

•

two flumes, a larger on top of the smaller, in order to handle a larger range of flows

plan

front

isometric

PL-399 6 – 38

PALMER-BOWLUS FLUME, P-40 = 1

(as manufactured by Warminster Fiberglass or Plasti-Fab)

transducer

D/2 point of measurement

plan

head

side

•

sized by pipe diameter

•

flume relief is trapezoidal

•

designed to install directly into pipelines and manholes

•

head is referenced to bottom of the throat

•

for rated flows under free flow conditions, the head is measured at a distance of D/2

not

D = pipe or sewer diameter

to bottom of pipe.

front

upstream from the beginning of the converging section.

•

position the transducer such that it is centered over the flow at a minimum height of 30 cm (12") above the maximum head.

PL-399 6 – 39

H FLUMES, P-40 = 3

(as developed by the U.S. Department of Agriculture, Soil Conservation Service)

plan

front

•

sized by max. depth of flume

•

approach is preferably rectangular, matching width and depth for distance 3 to 5

transducer

point of

measurement

side

times the depth of the flume.

•

flow range 100:1

•

may be installed in channels under partial submergence (ratio of downstream level to head). Typically: -1% error @ 30% submergence

-3% error @ 50% submergence

•

for rated flows under free flow conditions, the head is measured at a point downstream for the flume entrance. Refer to the following table.

Flume Size Point of Measurement

(D ft) cm Inches

0.5 5 1-3/4

0.75 7 2-3/4

1.0 9 3-3/4

1.5 14 5-1/2

2.0 18 7-1/4

2.5 23 9

3.0 28 10-3/4

4.5 41 16-1/4

•

H flumes come with flat or sloping floor. Same flow table can be used as error is less than 1%.

•

position the transducer such that it is centered over the flow at a minimum height of 30 cm (12") above the maximum head

PL-399 6 – 40

OTHER, P-40 = 4 or 5

Where the primary measuring device does not fit one of the three other categories, P-40 may be programmed for one or two head versus flow characterizations.

- P-40 = 4 : curved

- P-40 = 5 : linear

Head

P-40 = 4, curved

l o w

Head

P-40 = 5, linear

Select the method which best fits the flow characteristics of the primary measuring element.

Characterization is achieved by entering the head (H parameter) and corresponding flow (F parameter) either from empirical measurement or from the manufacturer’s specification. The more breakpoints that are defined, the more accurate will be the flow measurement. Breakpoints should be concentrated in areas exhibiting the higher degrees of non linear flow. A maximum of eleven breakpoints can be defined.

Head data is entered in the linear units selected (P-1) and flow data is entered in the desired units of flowrate.

By setting P-40 = 4 or 5, the H-# and F-# co-ordinates, where:

H = head data

F = flow data

# = breakpoint 1 to 11

may be alternately accessed for the selected breakpoint by successively

pressing . Breakpoints are selected by entering the desired breakpoint number

or by pressing the or key. When the desired co-ordinate has been selected,

the entry field is accessed by pressing and the head or flow is entered.

∗

↑

↓

ALT

DISP

To end programming of H and F co-ordinates, press CLR while H-# or F-# is being displayed.

PL-399 6 – 41

Example 6b

The application is to measure the flow across a 4 ft. rectangular weir with end contractions. The flow is characterized by the following formula:

cfs = 3.33 (L - 0.2H) H

1.5

where cfs = flow in cu ft/sec

select:

P-1 enter option "3", units in feet

advance to:

P-2 enter option "5", OCM

P-3 enter "4", empty distance to transducer

P-4 enter "3", span

P-5 enter "1" near blanking distance

P-39 enter option "4", display flowrate

P-40 enter option "4", universal head vs. flow

L = length of crest H = head

press display will show or enter

*H-1 ALT. DISP. ---00 ENTER 0.000 ↑ H-2

----

ENTER 0.300 ↑ H-3

----

ENTER 0.600 ↑ H-10

----

2.7 2.7 ENTER 2.700 ↑ H-11

----

33 ENTER 3.000

PL-399 6 – 42

*F-11

----

ALT. DISP. F-11 1F-1 ALT. DISP. ---00 ENTER 0.0000 ↑ F-2

----

2.156 2.156 ENTER 2.156 ↑ F-3

----

6.005 6.005 ENTER 6.005 ↑ F-10

----

51.12 51.12 ENTER 51.12

58.83 58.83 ENTER 58.83 ALT. DISP. F-12 CLR P-40

P-41 enter option "4", flowrate time units - per day

P-46 enter option :"58.83", maximum flowrate in ft3/sec

P-49 enter option "3", flowrate decimal point display max. 3 digits after decimal

P-52 enter option "0", totalizer convert display is divided by 1 before being

displayed or 1 count per thousand ft

P-53 enter option "2", totalizer decimal point display 2 digits after decimal or

resolution equals 1/100th of a count

press:

RUN

CAL

PL-399 6 – 43

to re-enter run mode

Applications with Standpipes

In many solids and liquid applications, access to the vessel must be made via a standpipe. In such cases, Milltronics can provide flange mounted transducers that will readily mate to the standpipe (refer to Figure 4).

The maximum standpipe length that can be used without additional near blanking (P-5 not greater than 0.3 m) is 200 mm (8"). For greater standpipe lengths, up to 30" long, near blanking must be extended to 150 mm (6") beyond the end of the pipe.

The preferred dimension when selecting a standpipe arrangement is a 100 mm (4") dia. pipe, 300 mm (12") long. Near blanking would be set at 460 mm (18").

Example 7

Referring to Example 4, if the transducer were mounted to a 150 mm dia. flanged standpipe 0.5 m long, instead of a 1 m dia. manhole, the following will be required:

select:

P-5 enter “.65”, near blanking

0.50 m (standpipe length) +0.15 m (blanking past pipe)

0.65 m total blanking distance

press:

RUN

CAL

to re-enter run mode.

PL-399 6 – 44

■

NOTE:

•

(F) indicates the parameter’s factory setting, where applicable. For reference only - factory set values may change with software revisions.

•

(V) indicates that parameter can be viewed only, not entered.

P-0 security

This parameter can be used to lock out the calibrator such that the content of parameters P-1 through P-99 can not be changed. This however does not prevent the parameters from being selected and viewed. The calibrator is locked out if the content of P-0 is of any value other than

1954. P-0 can only be direct accessed. content = 1954, calibrator functional (F)

= – 1, pumps active during simulation

SECTION VII

PARAMETER DESCRIPTION

1954, calibrator locked out

≠

P-1 units of calibration and display

enter 1 = meters (F) 1* = calibrate in meters, display in %

2 = centimeters 2* = calibrate in centimeters, display in % 3 = feet 3* = calibrate in feet, display in % 4 = inches 4* = calibrate in inches, display in %

NOTE: For % display, entry must be made as and will be

displayed as “#P”

e.g. : press keypad switches and then , display will

appear as “3P”’

# *

3 *

PL-399 7 – 1

P-2 mode of measurement

enter 1 = liquid level

2 = space (F) 3 = differential level 4 = volume totalizer (pump totalizer) 5 = OCM (open channel measurement)

P-3 empty distance to transducer

enter desired amount (F=10.00 m)

P-4 span

- distance between full (high) and empty (low) levels

- max. level differential if DLD (P-2 = 3) is selected

- max. head if OCM (P-2 = 5) is selected

enter desired amount (F=10.00 m)

P-5 near blanking

enter distance required, in units as set in P-1. Note that entry must be slightly larger than distance to end of standpipe or to far side of obstruction. (F=0.300 m)

P-6 milliamp output

enter 0 = off

1 = 0 to 20 mA 2 = 4 to 20 mA (F) 3 = 20 to 0 mA 4 = 20 to 4 mA

P-7 decimal point location

Sets the maximum number of digits after the decimal. The number of digits after the decimal will automatically reduce to avoid display overflow.

enter 0 = no digits after decimal

1 = one digit after decimal 2 = two digits after decimal (F) 3 = three digits after decimal

P-8 relay 1 function

Refer to Section V, Relays. enter desired option (F=0)

P-9/10 relay 1 - ON/OFF setpoints