Level Pro ITC 250 User Manual

Download

Page 1

250 SERIES

Loop Powered Display

USER MANUAL

FLOW METER ITC 250 SERIES

Firmware: V.1.00 or Higher Input Type: 4-20 mA Supply from Current Loop 4-20 mA

Read the user's manual carefully before starting to use the unit or software.

Manufacturer reserves the right to implement changes without prior notice.

* Quick Start Programming Menu Page 17

Page 2

250 SERIES

Loop Powered Display

* Quick Start Programming Menu

TABLE OF CONTENTS

1. BASIC REQUIREMENTS AND USER SAFETY

2. GENERAL CHARACTERISTICS

3. TECHNICAL DATA

4. DEVICE INSTALLATION

4.1. UNPACKING

4.2. ASSEMBLY

4.3. CONNECTION METHOD

4.4. MAINTENANCE

DESCRIPTION OF THE FRONT P

6. PRINCIPLE OF OPERATION

MEASUREMENT MODE

6.1.

ANEL AND IR REMOTE CONTROLLER PUSH-BUTTONS

Page 17

02 03 03 04 04 04 05 07 07 08 08

6.2. DETECTION OF THE P

6.3. CONTR

7. DEVICE PROGR

7.1. PROGR

7.2. PAR

7.2.1. Numeric paramet

7.2.2. Swit

7.3. MENU DESCRIPTION

7.3.1. “

7.3.2. “

7.3.3. ”HOLd” menu

7.3.4. “

7.3.5. “

OL OF THE RELAY OUTPUT

AMMING MENU

AMETERS EDITION.

rEL” menu inPt” menu

Scod” parameter dEFS” parameter

EAK VALUES

AMMING

ers (digit change mode)

ch parameters (“LIST” type)

09 09 10 10 11 11 11 12 12 13 15 16 16

7.3.6. “

7.4. MENU STRUCTURE

SErv” menu

16 17

Page 3

250 SERIES

Loop Powered Display

Explanation of symbols used in the manual

This symbol denotes especially important guidelines concerning the installation and operation of the device. Not complying with the guidelines denoted by this symbol may cause an accident, damage or equipment destruction.

IF THE DEVICE IS NOT USED ACCORDING TO THE MANUAL THE USER IS RESPONSIBLE FOR POSSIBLE DAMAGES.

This symbol denotes especially important characteristics of the unit. Read any information regarding this symbol carefully.

1. BASIC REQUIREMENTS AND USER SAFETY

Do not use the unit in areas threatened with excessive shocks, vibrations, dust, humidity, corrosive gasses and oils.

Do not use the unit in areas where there is risk of explosions. Do not use the unit in areas with significant temperature variations, exposure to condensation or ice. Do not use the unit in areas exposed to direct sunlight. Make sure that the ambient temperature (e.g. inside the control box) does not exceed the

recommended values. In such cases forced cooling of the unit must be considered (e.g. by using a ventilator).

The manufacturer is not responsible for any damages caused by inappropriate installation, not maintaining the proper environmental conditions and using the unit contrary to its assignment.

Installation should be conducted by qualified personnel . During installation all available safety requirements should be considered. The fitter is responsible for executing the installation according to this manual, local safety and EMC regulations.

GND input of device should be connected to PE wire; The unit must be properly set-up, according to the application. Incorrect configuration can cause

defective operation, which can lead to unit damage or an accident. If in the case of a unit malfunction there is a risk of a serious threat to the safety of people or property additional, independent systems and solutions to prevent such a threat must be used.

The unit uses dangerous voltage that can cause a lethal accident. The unit must be switched off and disconnected from the power supply prior to starting installation of troubleshooting (in the case of malfunction).

Neighboring and connected equipment must meet the appropriate standards and regulations concerning safety and be equipped with adequate overvoltage and interference filters.

Do not attempt to disassemble, repair or modify the unit yourself. The unit has no user serviceable parts. Defective units must be disconnected and submitted for repairs at an authorized service center.

The unit is designed for operation in an industrial environment and must not be used in a household environment or similar.

Page 4

250 SERIES

Loop Powered Display

2. GENERAL CHARACTERISTICS

The ITC

250 is a simple digital wall-mounted indicator equipped with one measurement input (current

input, 4-20mA) used simultaneously as device power supply input. The current input has includes an over-current protection circuit which protects standard resistor. The ITC 250 allows user to select a

conversion characteristic of several kinds: linear, square, square root, and user defined (max.20 points length). The Display consists of 4-digits. The displayed values can be selected by the user, within the range of (-999 to 9999) including one decimal point.

Optionally ITC 250 can be equipped with bistable relay output. The device can be configured via IR remote controller.

IR remote controller is not a part of the ITC 250 and must be ordered separately.

3. TECHNICAL DATA

Minimal Supply Current

Measurement Loop voltage Drop

Current Input Current Measurement

Accuracy

3.5 mA | device supplied from current loop

Max. 7 V

4÷20 mA overload protected | maximum input current about 50 mA

± 0,1% @ 25°C | ± One Digit

Temperature Stability

Display Range Accepted Prolonged

Input Overload Relay Output

Display

Data Memory

Protection Level

Housing Type

Housing Material

Housing dimensions

Operating Temperature

Model Dependant

Storage Temperature Model Dependant

50 ppm | °C

-999 ÷ 9999 | plus decimal point

20%

Bistable 0.5A|30V AC (cos j = 1), min. switching delay: about 4 sec.

LED, 4 digit | 13mm height, Red

Non-volatile memory | EPROM type

IP 65

Wall Mounted

ABS + fibreglass Without Glands: 64 x 58 x 36 mm

With Glands: 64 x 82 x 36 mm 0°C to +50°C

or -20°C to +50°C

-10°C to +70°C | -20°C to +70°C

Mounting

Connection Cable

to wall | 2 M3 bolts Without relay : 2 Core Cable (Power Supply)

With relay : 4 or 5 core cable (2 power supply wires + 2 or 3 wires for relay)

www. levelprosales.com

Page 5

250 SERIES

Loop Powered Display

Max. Connection Leads Diameter

EMC

This is a class A unit. In a residential or a similar area it can cause radio frequency interference. In such cases the user can be requested to use appropriate preventive measures.

DEVICE INSTALLATION

The interference that may occur within a typical industrial environment. In order to take full advantage of these characteristics the installation of the unit must be conducted correctly and according to the local regulations.

has been designed and manufactured ensuring a high level of user safety and resistance to

unit

Installation should be conducted by qualified personnel. Read the basic safety requirements on page 3 prior to starting the installation. All installation works must be conducted with a disconnected power supply.

2,5 mm2

According to: PN-EN 61326-1

4.1. UNPACKING

After removing the unit from the protective packaging, check for transportation damage. Any transportation damage must be immediately reported to the carrier. Also, write down the unit serial number on the housing and report the damage to the manufacturer.

Included with the unit

User's Manual, Warranty,

4.2. ASSEMBLY

Disconnect the power supply prior to starting assembly. Check the connections are wired correctly prior to switching the unit on.

To install device on the wall, a pinholes should be made. Figure 4.1 presents dimensions of the device and distances between holes. The back side of the device has four mounting holes. This part of the case should be mounted to a wall by screws.

Page 6

250 SERIES

Loop Powered Display

4.3. CONNECTION METHOD

Installation should be conducted by qualified personnel. During installation all available safety requirements should be considered. The installer is responsible for executing the installation according to this manual, local safety and EMC regulations.

Wiring must meet appropriate standards and local regulations and laws. Tighten the clamping screws. The recommended tightening torque is 0.5 Nm. Loose

screws can cause fire or defective operation. Over tightening can lead to damaging the connections inside the units and breaking the thread.

The unit is equipped with housing, cover and gland or M12 connector, protecting against water intrusion. Pay special attention to their correct tightening or clamping. In the case of any doubt consider using additional preventive measures (covers, roofing, seals, etc.). Carelessly executed assembly can increase the risk of electric shock.

Due to possible significant interference in industrial installations appropriate measures assuring correct operation of the unit must be applied. To avoid the unit of improper indications keep recommendations listed below.

CAUTION

Avoid common (parallel) leading of signal cables and transmission cables together with power supply cables and cables controlling induction loads (e.g. contactors). Such cables should cross at a right angle.

Contactor coils and induction loads should be equipped with anti-interference protection systems, e.g. RC-type.

In the case of magnetically induced interference the use of twisted couples of signal cables (socalled “spirals”) is recommended.

Connections of measurement signal and relay output should be made by screw connectors mounted inside the housing.

0.25"

max. 0.08"

Figure 4.2. Method of cable insulation replacing and cable terminals

Page 7

1 2

3 4

250 SERIES

Loop Powered Display

3 4

OFF

Figure 4.3. Terminals description

24V DC

4 5

Figure 4.4. Connection of 2-wire current converters

1 2

Figure 4.5. Connection of 3-wire current converters

www. levelprosales.com

Page 8

250 SERIES

Loop Powered Display

4.4. MAINTENANCE

The unit does not have any internal replaceable or adjustable components a vailable to the u ser. Pay attention to the ambient temperature in the room where the unit is operating. Excessively high temperatures can result in damage to the internal components and shorten the fault-free time of unit operation. In cases where the unit gets dirty do not clean with solvents. For cleaning u se warm water with small amount of detergent or in the case of more significant contamination ethyl or isopropyl alcohol.

Using any other agents can cause permanent damage to the housing.

Product marked with this symbol should not be placed in municipal waste. Please check local regulations for disposal of electronic products.

5. DESCRIPTION OF THE FRONT PANEL AND IR REMOTE CONTROLLER PUSH-BUTTONS

infrared transmitter

Symbols and functions of Push Buttons:

Symbol used in the manual : [ESC/MENU]

ESC

Functions:

• Enter to main menu ( press and hold for at least 2 sec.)

• Exit the current Scr

• Cancel the changes made in parameter being edited

een and Enter to previous menu (or measure mode)

Page 9

250 SERIES

Loop Powered Display

Symbol used in the manual : [ENTER]

Functions :

ENTER

• Start to edit the parameter

• Enter into the sub-menu

• Confirmation of changes made in parameter being edited

Symbol used in the manual : [^] [v]

Functions :

• Change of the present menu

• Modification of the parameter value

• Change of the display mode

6. PRINCIPLE OF OPERATION

Power to the 250 Series display is supplied from current loop. To ensure the display functions correctly the signal of the current loop must be greater than 3.5mA. If signal value is below 3.5mA a

running decimal point is displayed. Device configuration using remote controller is possible if signal value of current loop is greater than 10mA (Located on front panel LED marked “IR”).

6.1 MEASURING PRICIPLE

The measurement range e and the measurement range equal to the extended nominal range is called: permissible measurement range (figure 6.1).

”Lo r” parameter

qual to the nominal range is called: nominal measurement range,

”Hi r” parameter

Figure 6.1. Definitions of measurement ranges in mode 4 ÷ 20mA

If the result of measurement exceeds the permissible measurement range, warning “-Hi-” or “-Lo-” is displayed rather than input signal, depends on exceeded value (see description of “Lo r” i “Hi r” parameters, paragraph “inPt” menu).

If the measurement value do not exceed the permissible measurement range exceeds range -999 ÷ 9999, the warning “-Ov-” is displayed rather than the calculated result.

, but displayed value

Page 10

250 SERIES

Loop Powered Display

Configuration of the device via menu does not interrupt the level measurement.

6.2. DETECTION OF THE PEAK VALUES

The ITC 250 controller is equipped with a peak detection function. It can detect the input signal peaks and display their values. Presets connected with this function are placed in “HOLd” menu (see description of “HOLd” menu).

”timE”

”PEA”

Figure 6.4. Process of peaks detection

6.3. CONTROL OF THE RELAY OUTPUT

The 250 Series display is equipped with one bistable SPDT relay output. When energized it will LED 'R' will light up. It is not possible to change relay state until after 10 seconds has elapsed since the device has been powered on. The display must be powered by at least 3.5 mA current. After the display is properly powered the change of relay state is four (4) seconds. During device power off the

relay is set according to the value of “AL” parameter. The different modes of the control can be changed and are dependent on the parameter values for “SEtP”, “SEt2”, “HYSt”, “modE” and “AL”. The “modE” parameter will also the controlled over one or two thresholds values. If one threshold is used (figure 6.4) the relay can be turned on (“modE” = “on”) or off (“modE” = “oFF”) when the input signal value enters the zone A. If two thresholds are used (figure 6.5) the relay will be turned on when value of input signal enters the zone A (“modE” = “in”) or zone B (“modE” = “out”) and turned off if the signal enters the second one.

relay to be used or

Page 11

250 SERIES

Loop Powered Display

Figure 6.5. One threshold control of the relay/LED outputs

”SEt P” or ”SEt P2” parameter

Figure 6.6. Two threshold control of the relay/LED outputs

The relay outputs and LEDs (named "R") can be controlled depend on both - the current value and the peak value (when peak detection is active, for flow rate only) of the input signal.

7. DEVICE PROGRAMMING

The display menu allow user to set all parameters connected to operation of measurement input, control modes, critical situations behavior (relay) and access settings. The meaning of the particular parameters is described in paragraph MENU DESCRIPTION.

The device is configured via IR and the temperature must be at least 0°C in order to do that.

remote controller but it must be supplied at least by 10mA current

7.1. PROGRAMMING MENU

To enter main menu (measurement mode) the operator must to press and hold the [ESC/MENU] button for a minimum of two (2) seconds If the user password is defined (see parameter “Scod”), the operator will have to correctly enter it at this point prior to proceeding to menu options . After entering of last digit of the correct password the first menu position will be displayed if the password is incorrect that a warning “Err” will be displayed.

Page 12

250 SERIES

Loop Powered Display

Functions of the buttons while sub-menu and parameters choice:

Selection of sub-menu or parameter for editing. Name of selected item (submenu or parameter) is displayed.

Operation of [ENTER] button depend on present menu position:

• if the name of some sub-menu is displayed - Press Enter; the name of the first parameter (or next level sub-menu) is then displayed,

• if the name of some parameter is displayed - Press Enter; present value of the parameter is displayed

ESC

After about 1 minute of inactivity (since last use of the button), the device exits the menu mode and returns to the measurement mode.

[ESC/MENU] button allow user to exit present menu level and move to upper level menu (or measurement mode).

7.2. PARAMETERS EDITION

To start edition of any parameter user should select name of desired one using [^] [v] buttons and then press [ENTER].

7.2.1. Numeric parameters (Digit Change Mode)

Numerical p arameters a re d isplayed a s decimal n umbers. T he m ode o f i ts new v alue e ntering depends on chosen edit method ( see parameter “Edit”). In mode “by digit” (“Edit”=“dig”) pressing one of t he keys [^] or [v] causes change of current position (flashing digit) or the sign (+/-). S hort p ressing of the [ENTER] button c auses change of the p osition (digit). Press [ENTER] at least 2 seconds to accept the changes, after that question “SEt?” is displayed, and user must to confirm (or cancel) the changes. To confirm changes (EEPROM) press the [ENTER] button shortly after “SEt?” is displayed. To cancel the changes press [ESC] button shortly after “SEt?” is displayed. The device will then return to the main menu.

7.2.2. Switch parameters (“LIST” type)

Switch parameters can be described as a s ets of values (a lists) out of which only one o f the options available on the list can be selected f or t he g iven parameter. O ptions of switching parameter are selected using [^], [v] keys. Pressing of the [ENTER] will prompt the user to acknowledge the question (“SEt?”). If key [ENTER] is pressed once again, the changes are accepted and will be stored in EEPROM. Pressing the key [ESC] after “SEt?” will cancel any changes and will return to the main display menu.

Page 13

250 SERIES

Loop Powered Display

Functions of buttons when editing numeric and switching parameters :

While editing numeric parameter - change of current (flashing) digit. While editing switch parameter - selection of switch parameter.

If numerical parameter is being changed or edited a quick pressing of the [ENTER] button will change edited position. A longer press and hold (min 2 sec) of the [ENTER] button will causes the display to prompt the user a “SEt?” ask, which allow user to make sure if change of the parameter value is correct. If switch parameter is being edited, a short press of [ENTER] button causes of display a “SEt?” ask. When [ENTER] button is pressed again (while “SEt?” is displayed) the new value of the parameter is stored in EEPROM memory.

ESC

Pressing this button operator can cancel the changes done up to now (if they were not approved by [ENTER] button after the “SEt?” ask) and come back to menu

7.3. MENU DESCRIPTION

- password checking. If some password different from “0000” is set, then every enter to

“- - - -”

main menu follows the entering of password. If entered password is correct then first menu position will be displayed else warning “Err”, and unit returns to measurement mode.

Due to problem with direct displaying of “m” letter, it is exchanged with special sign “m“. Independently in user manual letter “m” is used to make it more readable (example: “modE”).

7.3.1. “rEL” menu

This menu allows to configure the operation mode of relay and LED marked “R”. Principle of the relay operation is described in paragraph CONTROL OF THE RELAY OUTPUT.

The relay output and LED (named R) can be controlled depend on both - the current value and the peak value (when peak detection is active) of the input signal.

“SEtP”

“SEt2”

“HYSt”

first threshold of the relay (range -999 ÷ 9999). Negative values can be input by selecting a “-” sign on first digit (to change value use [^] and [v] buttons). Threshold is the medium value of relay hysteresis.

second threshold of the relay (range -999 ÷ 9999). Negative values can be input by selecting a “-” sign on first digit ( to change value use [^] and [v] buttons). This threshold is accessible when “modE” parameter is set to “in” or “out” value. Threshold is the medium value of relay hysteresis.

hysteresis of relay (range 0 ÷ 999). Full hysteresis of the relay is equal to 2x “HYSt” parameter. The relay state can change when an input signal is out of threshold-hysteresis to threshold+hysteresis zone.

Presented parameters should be set to ensure that “SEtP” + ”HYSt”, “SEt2” + ”HYSt”, “SEtP” ”HYSt” or “SEt2” - ”HYSt” do not exceeds the measure range. Additionally, in two threshold mode (“modE” = “in” or “out”), the hysteresis for both thresholds must not cover each other (in other case relay can't change its state).

Page 14

250 SERIES

Loop Powered Display

"modE" - relay operation mode:

“noAc”

“on”

“oFF”

“in”

“out”

“AL”

the relay is not active (doesn’t change state)

one threshold mode, the relay turns ON when input signal exceeds from the bottom SEtP+HYSt value, and turns OFF when exceeds from the top SEtP-HYSt,

one threshold mode, the relay turns ON when input signal exceeds from the top SEtP-HYSt value, and turns OFF when exceeds from the bottom SEtP+HYSt,

- two threshold mode, the relay turns ON when the input signal exceeds from the bottom “lower threshold + HYSt” or from the top “bigger threshold - HYSt”, and turns OFF when exceeds from the top “lower threshold - HYSt” or from the bottom “bigger threshold + HY one of “SEtP” and “SEt2” thresholds, the lower threshold means lower one of “SEtP” and “SEt2” thresholds.

- two threshold mode, the relay turns ON when the input signal exceeds from the top “lower threshold - HYSt” or from the bottom “bigger threshold + HYSt”, and turns OFF when exceeds from the bottom

“lower threshold + HYSt” or from the top “bigger threshold “SEtP” and “SEt2” thresholds, the lower threshold means lower one of “SEtP” and

- HYSt”. The bigger threshold means bigger one of

St”. The bigger threshold means bigger

“SEt2” thresholds.

• LED lights when “ON” part of the relay is closed, independently of relay’s mode.

• When power supply fail, unit sets relay state accordingly to “AL” parameter.

- this parameter defines the relay reaction when some critical situations occurs:

“noCH” - relay do not change his state, “on”  - relay will be turned ON, “oFF”  - relay will be turned OFF.

If parameter “modE” is set to “on” , “oFF”, “in” or “Out” the “critical situation” means that allowable measurement range is exceeded.

• If option “noCH” is selected for “AL” parameter, behaviour of the relay may depend on “FiLt” parameter in some cases. If “FiLt” is set to big value and the input signal drops, result value of the measure will change slow, causes of turning on or off relay due to thresholds values. The critical situation is slowly detected, so it is impossible to predict the relay state in that situations.

• If parameter “AL” = “on”, the relay will be turned on in the critical situations, even if his parameter “modE” = “noAC”.

7.3.2. “inPt” menu

This menu presets the measurement input:

- this option presets type of the conversion characteristic, and can be set to:

“CHAr”

“Lin”  - linear “Sqr”  - square “Sqrt” - square root

“USEr”-

user defined characteristic. Maximal length 20 points. Every point is defined by user. Adding, Editing and Deleting of points is done by options “AddP”, “EdtP”, “dELP” (“InPt” menu) respectively.

If user defined characteristic is selected, and if number of defined points is lower than 2 then warning “Errc” is displayed in measurement mode.

When one of those characteristics is chosen display range is defined by “Lo C” and “Hi C”.

}

Page 15

250 SERIES

Loop Powered Display

The process of displayed result calculation is described in details in DISPLAY VALUES CALCULATION paragraph.

“FiLt”

“Pnt”

“Lo C”

“Hi C”

- this parameter sets filtration rate. It can be set to values from 0 (no filtration ) to 5 (strongest filtration – time window about 3 sec).

- decimal point position. It can be set to one of : “0”, “0.0”, “0.00”, “0.000” Decimal point position is changed by [^], [v] buttons.

These parameters describe the values displayed for minimum and maximum input current. “Lo C” parameter defines the value displayed when input current is equal 4 mA, and “Hi C” parameter defines the value displayed for 20 mA of input current. Available range for these parameters: -999 ÷ 9999. Negative values can be set by entering '-'

sign on the first position (by use of [^], [v] buttons).

If user defined characteristic is selected (parameter “CHAr” = “USEr”) the parameters “Lo C” and “Hi C” are not available for modification, due to their values are calculated from defined characteristic.

- this menu allow user to add single point to the user defined characteristic. After selection of this option device waits for “X” and “Y” coordinates of new point. Modification of the coordinates is done accordingly to numerical

“AddP”

parameters edition. Coordinate “X” defines the percentage ratio of input current to selected current range. The “X” range: -99,9 ÷ 199,9. Coordinate “Y” changed in range: -999 ÷ 9999, decimal point position depend on “Pnt” parameter (menu “inPt”).

defines displayed value for particular

“X” value. The “Y” value can be

• User can not enter two points with the same value of “X” coordinate. If user trays to do it, “Err” warning is displayed. To modify any defined point use “EdtP” option.

• To distinguish “X” and “Y” c

oordinates, if “X” coordinate is displayed an additional decimal point on

utmost right position is displayed.

• If user defined characteristic is selected, and if number of defined points is lower than 2 then warning

“Errc” is displayed in measurement mode.

“dELP”

“Pnt”

“AddP”, “dELP” and “EdtP” options are available only if the user defined characteristic is used (it means when parameter “CHAr” = “USEr”).

“Lo r”, “Hi r”

- this option allows user to delete any of the points of the user defined characteristic. After selection current number of points of the user defined characteristic is displayed for about approx. 1.5 sec. After that device waits for selection of point being deleted (by [^], [v] buttons). The short pressing of switching between X and Y value of the displayed point. The long press (press and hold at least 2 sec) of [ENTER] button causes by displaying “dEL?” ask. If [ENTER] button is pressed again, current point i updated number of points of the user defined characteristic is displayed.

- this option allows user to modify of particular point of the user defined characteristic. After selection current number of points of the user defined characteristic is displayed for about approx. 1.5 sec. After that device waits for selection of point being edited (by [^], [v] buttons). The short pressing of [ENTER] button causes by switching between X and Y value of the displayed point. The long press (press and hold at least 2 sec) of [ENTER] button causes by entering to edit the selected coordinate of the point. Modification of the coordinates is done accordingly to nume

- these parameters define the expansion of nominal range in percent. They determine the permissible range of input signal (figure 7.1).

The permissible range allow user to exceed the nominal range of input signal. If input value is contained in the permissible range a proper result is displayed. If input signal exceeds this range (defined by “Lo r” and “Hi r”), “-Lo-” or “-Hi-” warning is displayed depend on input signal value.

rical parameters edition.

[ENTER] button causes by

s deleted and new

Page 16

250 SERIES

Loop Powered Display

" "

The “Lo r” parameter determines lower border of the permissible range calculated due to expression: I

min = 4 mA - 4 mA × “Lo r” %.

The “Lo r” value can be set from 0 to 12.4%. Parameter “Hi r” determines the upper border of the permissible range accordingly to the expression: I

max = 20 mA + 20 mA × “Hi r” %.

The value of “Hi r” can be set from 0 to 19.9% In example no 1 of the DISPLAY VALUES CALCULATION paragraph the procedure of the permissible

input range determining is presented in details.

If the measurement value do not exceeds permissible measurement range but displayed value exceeds range -999 ÷ 9999, the warning “-Ov-” is displayed rather than the calculated result.

7.3.3. ”HOLd” menu

This menu contains parameters connected with peak detection function. See also full description of the peak detection function in paragraph: DETECTION OF THE PEAK VALUES

- the type of detected changes of the input signal, can be set to values:

“modE”

“PEA”

“timE”

“HdiS”

“norm”- peaks - peak and next drop of the input signal of value equal at least “PEA”, “inv”  - drops - drop and next peak of the input signal of value equal at least “PEA”,

- minimal detected signal change classified as peak or drop (see Figure 6.2)

- maximum time of displaying of the peak (drop) value, can be set from 0.0 to 19.9 sec, with 0.1 sec. resolution.

- type of displayed values:

“rEAL”- current value is displayed, “HOLd” - peak (drop) value is displayed,

- relay/LED output R operation mode:

“H r1”

“rEAL” - relay/LED operates depend on the current value, “HOLd”- relay/LED operates depend on the peak (drop) value.

Page 17

250 SERIES

Loop Powered Display

7.3.4. “Scod” parameter

This parameter defines user password (4-digits number). If this parameter is set at value “0000”, user password is turned off.

If the user do not remember his password, the access to the menu is possible by the “one-use password”. To get this password please contact with Marketing Division. “Single use password” can be used only one time, after that it is destroyed. Entering this password causes in clearing of user password, it means sets the user password to “0000”.

The “one-use password” can be used ONE TIME ONLY, it is impossible to use it again! The “one-use password” can be restored by Service Division only.

7.3.5. “ dEFS” parameter

This setting allows to restore the factory settings of the device. To get the access to this option special password is required: “5465”, next the device displays acknowledge question “SEt?”. Press [ENTER] to acknowledge the restoring of factory settings or [ESC] to cancel.

7.3.6. “SErv” menu

This menu contains the parameters for authorized service only. To enter this menu proper service password must be entered. Improper settings can causes of damage of the device.

Page 18

250 SERIES

Loop Powered Display