Level Pro ITC 250 SERIES User manual

Read the user's manual carefully before starting to use the unit or software.
Manufacturer reserves the right to implement changes without prior notice.
Firmware: V.1.00 or Higher
Input Type: 4-20 mA
Supply from Current Loop 4-20 mA
USER MANUAL
FLOW METER ITC 250 SERIES
Loop Powered Display
250 SERIES
* Quick Start Programming Menu
Page 17

1.BASIC REQUIREMENTS AND USER SAFETY
2.GENERAL CHARACTERISTICS
3.TECHNICAL DATA
4.DEVICE INSTALLATION
4.1.UNPACKING
4.2.ASSEMBLY
4.3.CONNECTIONMETHOD
4.4.MAINTENANCE
5.DESCRIPTION OFTHE FRONT PANEL AND IR REMOTE CONTROLLER PUSH-BUTTONS
6.PRINCIPLE OF OPERATION
6.1.MEASUREMENTMODE
6.2.DETECTIONOFTHEPEAKVALUES
6.3.CONTROLOFTHERELAYOUTPUT
7.DEVICE PROGRAMMING
7.1.PROGRAMMINGMENU
7.2.PARAMETERSEDITION.
7.2.1.Numericparameters(digitchangemode)
7.2.2.Switchparameters(“LIST”type)
7.3.MENUDESCRIPTION
7.3.1.“rEL”menu
7.3.2.“inPt”menu
7.3.3.”HOLd”menu
7.3.4.“Scod”parameter
7.3.5.“dEFS”parameter
7.3.6.“SErv”menu
7.4.MENUSTRUCTURE
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TABLE OF CONTENTS
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* Quick Start Programming Menu
Page 17

Loop Powered Display
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Explanation of symbols used in the manual
1. BASIC REQUIREMENTS AND USER SAFETY
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.
This symbol denotes especially important characteristics of the unit. Read any
information regarding this symbol carefully.
IF THE DEVICE IS NOT USED ACCORDING TO THE MANUAL THE USER IS
RESPONSIBLE FOR POSSIBLE DAMAGES.
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.
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 unit is designed for operation in an industrial environment and must not be used in a
household environment or similar.
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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.
Minimal Supply
Current
3.5 mA | device supplied from current loop
Measurement Loop
voltage Drop
Max. 7 V
Current Input
4÷20 mA overload protected | maximum input current about 50 mA
Current Measurement
Accuracy
± 0,1% @ 25°C | ± One Digit
Temperature Stability
50 ppm |°C
Display Range
-999 ÷ 9999 | plus decimal point
Accepted Prolonged
Input Overload
20%
Relay Output
Bistable 0.5A|30V AC (cos j = 1), min. switching delay: about 4 sec.
Display
LED, 4 digit | 13mm height, Red
Data Memory
Non-volatile memory | EPROM type
Protection Level
IP 65
Housing Type
Wall Mounted
Housing Material
ABS + fibreglass
Housing dimensions
Without Glands: 64 x 58 x 36 mm
With Glands: 64 x 82 x 36 mm
Operating Temperature
Model Dependant
0°C to +50°C
or -20°C to +50°C
Storage Temperature -
Model Dependant
-10°C to +70°C |-20°C to +70°C
Mounting
to wall | 2 M3 bolts
Connection Cable
Without relay : 2 Core Cable (Power Supply)
With relay : 4 or 5 core cable (2 power supply wires + 2 or 3 wires for relay)
3. TECHNICAL DATA
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.
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Max. Connection
Leads Diameter
2,5 mm2
EMC
According to: PN-EN 61326-1
4. DEVICE INSTALLATION
The unit has been designed and manufactured ensuring a high level of user safety and resistance to
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.
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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.
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.
4.2. ASSEMBLY
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.
Disconnect the power supply prior to starting assembly.
Check the connections are wired correctly prior to switching the unit on.
User's Manual,
Warranty,
Included with the 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.
5D

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.
Connections of measurement signal and relay output should be made by screw connectors
mounted inside the housing.
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 (so-
called “spirals”) is recommended.
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.
0.25"
max. 0.08"
Figure 4.2. Method of cable insulation replacing and cable terminals
4.3. CONNECTION METHOD
CAUTION
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Figure 4.3. Terminals description
5
3
4
ON
OFF
R+
-
1
2
Figure 4.4. Connection of 2-wire current converters
1
2
5
3
4
24V DC
Figure 4.5. Connection of 3-wire current converters
+
-
1
2
5
3
4
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5. DESCRIPTION OF THE FRONT PANEL AND IR REMOTE
CONTROLLER PUSH-BUTTONS
4.4. MAINTENANCE
The unit does not have any internal replaceable or adjustable components available to the user. 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 use 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.
infrared
transmitter
+
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Symbols and functions of Push Buttons:
Functions:
• Enter to main menu ( press and hold for at least 2 sec.)
• Exit the current Screen and Enter to previous menu (or measure mode)
• Cancel the changes made in parameter being edited
MENU
ESC
Symbol used in the manual :[ESC/MENU]

Functions :
• Start to edit the parameter
• Enter into the sub-menu
• Confirmation of changes made in parameter being edited
Functions :
• Change of the present menu
• Modification of the parameter value
• Change of the display mode
ENTER
Symbol used in the manual :[ENTER]
Symbol used in the manual :[^] [v]
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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”).
Themeasurementrangeequaltothenominalrangeiscalled:nominalmeasurement range,
and the measurement range equal to the extended nominal range is called: permissible
measurement range (figure 6.1).
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).
”Lo r” parameter ”Hi r” parameter
Figure 6.1. Definitions of measurement ranges in mode 4 ÷20mA
If the measurement value do not exceed the permissible measurement range, but displayed value
exceeds range -999 ÷ 9999, the warning “-Ov-” is displayed rather than the calculated result.
6.1 MEASURING PRICIPLE

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).
6.2. DETECTION OF THE PEAK VALUES
Configuration of the device via menu does not interrupt the level measurement.
”timE”
”timE”
”PEA”
”PEA”
Figure 6.4. Process of peaks detection
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The 250 Series display is equipped with one bistable SPDT relay output. When energized it will LED
'R' will light up. It is notpossible 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 relay to be used or
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.
6.3. CONTROL OF THE RELAY OUTPUT

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.
Figure 6.5. One threshold control of the relay/LED outputs
Figure 6.6. Two threshold control of the relay/LED outputs
”SEt P” or ”SEt P2” parameter
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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.
7.1. PROGRAMMING MENU
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 remote controller but it must be supplied at least by 10mA current
and the temperature must be at least 0°C in order to do that.

To start edition of any parameter user should select name of desired one using [^] [v] buttons and
then press [ENTER].
[ESC/MENU] button allow user to exit present menu level and move to upper level menu
(or measurement mode).
7.2. PARAMETERS EDITION
After about 1 minute of inactivity (since last use of the button), the device exits the menu mode
and returns to the measurement mode.
MENU
ESC
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Numerical parameters are displayed as decimal numbers. The mode of its new value entering
depends on chosen edit method ( see parameter “Edit”).
In mode “by digit” (“Edit”=“dig”) pressing one of the keys [^] or [v] causes change of current position
(flashing digit) or the sign (+/-). Short pressing of the [ENTER] button causes change of the position
(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.
7.2.1. Numeric parameters (Digit Change Mode)
Switch parameters can be described as a sets of values (a lists) out of which only one of the options
available on the list can be selected for the given parameter. Options 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.
7.2.2. Switch parameters (“LIST” type)
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
Functionsofthebuttonswhilesub-menuandparameters choice:

MENU
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
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7.3. MENU DESCRIPTION
7.3.1. “rEL” menu
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”).
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.
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).
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.
- 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.
“- - - -”
“SEtP”
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.
“SEt2”
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.
“HYSt”
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.
Functionsofbuttonswheneditingnumericandswitchingparameters:
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.

This menu presets the measurement input:
7.3.2.“inPt”menu
•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.
• 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”.
If parameter “modE” is set to “on” , “oFF”, “in” or “Out” the “critical situation” means that
allowable measurement range is exceeded.
If user defined characteristic is selected, and if number of defined points is lower than 2 then warning
“Errc” is displayed in measurement mode.
“in”
- 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 + HYSt”. The bigger threshold means bigger
one of “SEtP” and “SEt2” thresholds, the lower threshold means lower one of “SEtP” and “SEt2” thresholds.
“out”
- 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 - HYSt”. The bigger threshold means bigger one of
“SEtP” and “SEt2” thresholds, the lower threshold means lower one of “SEtP” and “SEt2” thresholds.
“AL”
- 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.
“CHAr”
- this option presets type of the conversion characteristic, and can be set to:
“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.
When one of those characteristics is chosen display
range is defined by “Lo C” and “Hi C”.
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"modE" - relay operation mode:
“noAc”
the relay is not active (doesn’t change state)
“on”
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,
“oFF”
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,

The process of displayed result calculation is described in details in DISPLAY VALUES CALCULATION
paragraph.
“AddP”, “dELP” and “EdtP” options are available only if the user defined characteristic is used (it
means when parameter “CHAr” = “USEr”).
• 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” coordinates, 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.
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.
“FiLt”
- this parameter sets filtration rate. It can be set to values from 0 (no filtration )
to 5 (strongest filtration – time window about 3 sec).
“Pnt”
- 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.
“dELP”
- 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 [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 displaying “dEL?” ask. If [ENTER] button is pressed again, current point is deleted and new
updated number of points of the user defined characteristic is displayed.
“Pnt”
- 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 Xand Yvalue 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 numerical parameters edition.
“AddP”
- 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
parameters edition. Coordinate “X” defines the percentage ratio of input current to selected current range.
The “X” range: -99,9 ÷ 199,9. Coordinate “Y” defines displayed value for particular “X” value. The “Y” value can be
changed in range: -999 ÷ 9999, decimal point position depend on “Pnt” parameter (menu “inPt”).
“Lo C”
“Hi C”
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).
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“Lo r”, “Hi r”
- 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.

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
7.3.3.”HOLd”menu
The “Lo r” parameter determines lower border of the permissible range calculated due to
expression: Imin = 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: Imax = 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.
“modE”
- the type of detected changes of the input signal, can be set to values:
“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”,
""
" " " "
5
" "
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“PEA”
- minimal detected signal change classified as peak or drop (see Figure 6.2)
“timE”
- maximum time of displaying of the peak (drop) value, can be set from 0.0 to 19.9 sec, with 0.1 sec. resolution.
“HdiS”
- type of displayed values:
“H r1”
- relay/LED output R operation mode:
“rEAL”- current value is displayed,
“HOLd” - peak (drop) value is displayed,
“rEAL” - relay/LED operates depend on the current value,
“HOLd”- relay/LED operates depend on the peak (drop) value.

This parameter defines user password (4-digits number). If this parameter is set at value “0000”, user
password is turned off.
7.3.4.“Scod”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.
7.3.5.“dEFS”parameter
This menu contains theparameters for authorized service only. To enter this menu proper service
password must be entered. Improper settings can causes of damage of the device.
7.3.6.“SErv”menu
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.
Loop Powered Display
250 SERIES
16

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Loop Powered Display
250 SERIES
17