Nokeval 201 User manual

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User's Manual
Models 201 & 202
No 050101 Nokeval

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Contents
User's Manual Models 201 & 202 ..................................................................1
General description .............................................................................................................. 3
AutopoweredLED-displays ............................................................................3
Typicalapplication ................................................................................................................ 3
Front panel buttons and indicators ..................................................................5
Configurationmode.................................................................................. 5
Resettingconfigurationparameters .......................................................... 5
Alarmlevelsetting..................................................................................... 5
Alarmfunctions ........................................................................................ 5
Disablealarms.......................................................................................... 5
Manualreset............................................................................................. 5
Configuration...................................................................................................6
Enter into configuration mode .................................................................. 6
Access code for configuration ................................................................. 6
Description............................................................................................................................ 7
Inputterminals.......................................................................................... 7
Alarm connections, only with model 202 ................................................... 7
Measuringmode ................................................................................................................... 7
Configuration mode..............................................................................................................7
Alarms off................................................................................................. 7
Yrittäjäkatu12
37100 NOKIA,FINLAND
Tel. [phone]
Fax. [phone] email [email protected]
http:// www.nokeval.com
Nokeval Oy

3
AutopoweredLED-displays
201 and 202
AutopoweredbrightredLED-displayneedsnoexternal
power supply. Current signal 4-20 mA provides the
necessaryenergy.Therefore,itispossibletoinstallthe
meter in places having no auxiliary power available.
YoucannowreplacetheautopoweredLCD-displays,
havingverypoorvisibility, bybrightredLED-displays.
Therearetwomodels:201withoutalarmsandmodel
202withtwo alarm contacts.
Displayscalingandconfigurationbyfrontpanelbuttons.
Unit has digital filter for stabilizing the 4-digit display.
General description
Space for unit of measure.
Commonly used unit collection is
delvered with the unit.
Thisfeatureisusefullincaseswherelargenumerical
valueisneeded.
Inmodel202Youmayconfiguretwooptionalalarms,
high and low. Alarm value setting is designed for
applications where it can stay as it is once adjusted.
More versatile alarm settings and alternative alarm
modesofferourpoweredmodels2011and2021.Pass
word is settable for entering configuration and alarm
stages.
Front panel protection IP65.
• For process input 4-20 mA
•Without external power supply
• Loop resistance 240 ohm only
• 4-digit processor based display
• Scaling on front panel
•2settablealarms
• Pass words for alarms and
configuration
• Front panel rating IP 65
Uz=4,8 V
Semiconductor fuse
10 ohm
4..20 mA
Polarity
protected
(+)
( - )
3240
Transmitter
4-20 mA
4-20 mA
Alarm 1 (low level)
Alarm 2 (High level)
20.1
Nokeval
m³/h

4
654 321
-
+
7
Input
4-20mA
Lowlevel
alarm
Highlevel
alarm
Connections:
A1 A2
Relays max. 250 VAC, 150 mA
96
48
Gasket (IP65)
6
65
10
Case dimensions (mm):
Cutout
43.7 x 90,7 mm ± 0.7 mm
Terminal 3 is not used
Alarmonly inmodel202
Input 4..20 mA
Display scaling -999....+9999
Accuracy 0.05%ofspan
Inputvoltage drop 201 continuous 4,8 V = 4-20 mA (comparable 240 Ω, non resistive)
202 continuous 7,3 V = 4-20 mA (comparable 340 Ω, non resistive)with alarms
Alarmrelays(option) 2 solid state relays (SSR), max. 250 VAC, 150 mA
Alarmreset automaticormanual (hold) via front panel key
Alarmmode Highandlow level
Hysteresis Selectable 0..100 %
Display 4-digitred LED, 14.5 mm, adjustable brightness
Front plateprotection IP65 with gasket, without gasket IP54
Push buttons Switches underfront panel surface
Ambienttemperature 0...+60 °C
Terminals Detachable2,5mm²
Weight 150g
Technical specifications:
Order codes:
Model201-4/20mA 4-digit 4-20 mA loop powered indicator
Model202-4/20mA With optional 2 alarms
ø2,5
Nc

5
*
5620
Frontpanel buttonsandindicators
▲▼-arrow-buttonsareusedtochangenumerical
value and for moving on configuration menu.
Exitfromselectedconfigurationstage
Alarm indicators LED's A1..A2.
Conf-led indicates
configurationmode
Configurationmode
Configurationcanbestartedbypressingandholding
★- and ▲-keys simultaneously for 2 seconds.
Configuration stage is for selecting input, display
scaling and alarm function.
Specified instructions on pages 6-7 section
Configuration.
Resettingconfigurationparameters
Sometimesitisnecessarytoreturnindicatorparameters
to factory defaults, e.g. if secret access code is
missed. Resetting can be done by pressing and
holding★-and➤-keyssimultaneouslyfor2seconds
whenconnectinginputsignal4..20mA.Prosedurewill
reset all settings to factory defaults.
Alarmlevelsetting
Alarm levels are selected with ▲▼-buttons one number at a time.
Changingbeginsfromthemostsignifigantdigitontheleft,desimalpoint
is selected first. Next digit to right is selected with ➤-button.
Accept and exit with ★ -button.
Enter selections in
configurationstage
400.00 400.00
Value selection Selecting next digit
Numbers
0...9
Desimal point selection
with -keys before
number selection
Alarmfunctions
Alarmscanbeviewedinconfigurationmode.Special
instructions on pages 6-7, section configuration.
Disablealarms
Negativehysteresisvaluedisablesalarmfunction.
Manualreset
Auto reset is a standard function. Manual reset with
frontpanel▼-key canbeselectedbychoosingwider
hysteresisthan full span (Hi -Lo).For example:Input
scalingis0..100,0i.e.fullspanis100.Selecthysteresis
largerthan100(9999)andYouwillhavemanualreset.

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CAL
CFCO
TrF
Inte
FiLt
Hi
Lo
ALHy
AL H
AL L
SAVE
UnDo
CODE
Old value State of
change New value
DEC
Old value State of
change New value
*
*
Configuration
Configurationcanbestartedbypressingandholding
★- and ▲-keys simultaneously for 2 seconds. Arrow
keys▲▼movesupanddowninmainmenu.Desired
function is selected with ➤-key. Save mode can be
selected directly by pushing ★-key in main menu.
Enter into configuration mode
Configurationcanbestartedbypressingandholding
★- and ▲-keys simultaneously for 2 seconds. Arrow
keys ▲▼ moves up and down in main menu.
Display intensity 1-15.
15 = brightest
Digital filter, factory default 0,2.
Value 1 means no filter
Display scaling for 20 mA, maximum value.
e.g. 20 mA=1000, decimals are selected in
section DEC. Same routine as section Lo.
LO and HI
Display scaling for 4 mA.
Pointselectsnumberofdigits
(notdecimals)(▲▼)andthen
select minmum scale value
with arrow keys (➤) (▲▼).
Numberofdecimalsisselcted
insectionDEC.Whenexiting
with ★-key, display show
selectedvaluewithdecimals.
Alarm values and hysteresis are selected in
configurationmode.
ChangescanberestoredbyselectingtextUnDOinto
display and pressing ➤-key. Note! Detailed
configuration stage description on next page.
Undo changes
andexit
Return (★)
Pass word for configuration mode
Decimals 0-3
(▲▼)
Highalarmsetting,sameroutineas lowlevelsetting.
Input calibration. Detailed instructions on page 8.
Square root function: LIN = linear display
Sqrt = square root display
Saveand
Exit
Lowlevelalarmsetting.
Return (★)
Hysteresis0..50%.Negativevalue disables alarm function. Manual
reset with front panel keys can be selected by choosing wider
hysteresis than full span (Hi -Lo).
Accesscodefor configuration
Configuration mode can be secured with pass word.
IffunctionisselectedunitasksCODE.Enterrequired
key combination as shown on page 8 section CFCo.

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Description
Input terminals
1(+)signalloop(4…20mA)
2(-)signalloop
3Not used, can be used as a spare terminal
Voltagedropin4..20mAinputloopismax4.8V.This
corresponds 240ohmloopresistance.Whenalarms
areused(optional)voltagedropismax7.3V.Inputis
securedforreversedpolarityandovercurrenttolerance
is 100 mA.
Alarm connections, only with model 202
4,5 Lowlevelalarm,displayis lowerthanalarmlevel
6,7Highlevelalarm,displayishigherthanalarmlevel
Solid state realays,SSR: max. 250 V ±DC/AC,
150 mA, 12 ohm. Isolation between input loop 4 kV.
Alarms can be taken into use by removing jumper
inside the case. Voltage drop will increase to 7,3 V.
Measuring mode
Thisisnormaloperatingmode.Scaledinputsignalis
in display. LED indicators functions are:
A1 = Low level indicator
A2 = High level indicator
Conf = Unit in configuration or calibration mode
Measuring mode can be changed to Configuration
modebypressingsimutaneously▲★-keys.IfAccess
code is used it must be entered when display shows
Code, enter selected button combination.
Configuration mode
Undo, Save ➤➤
➤➤
➤
Exit from configuration mode. SAVE saves new
configurationandUndo exitswithoutsaving.
AL L, AL H ➤➤
➤➤
➤
Alarmlevels(L=low,H=high).Bothalarmscannotbe
energizedatthesametime.Thereforelowlevelcannot
havehighervaluethanhighalarmandviceversa.
Ifinputsignalisunder3mArelayswillbede-energized.
(Normalopen'NO'relaysneedsenergytobeclosed).
ALHy ➤➤
➤➤
➤
Alarmhysteresisisnumberofdigitsbelowandabove
selected alarm level (both sides have same value).
Normallyalarmrelaysareenegizedwhendisplayvalue
goestoalarmlevelandde-energizedwhenitgoesover
hysteresisvalue.
Alarms can also have manual reset when hysteresis
value is set larger than measuring range (full span).
Manual reset is done with ▼-key from front panel.
An example of Manual reset / hold function:
High level alarm is 100 °C and low level -5 °C. When
inputis over100°C,LED A2lits(relay A2energized)
anditdon'tgooffeveniftheinputgoesbelow100°C.
It must be resetted manually with front panel key ▼.
Alarmwillberesettedalsoifinputgoesbelowselected
lowlevel(-5°C).Thatisbecausebothrelayscannotbe
energizedatthesametime.IfYoudonotwanttouse
this bossibility given by the other alarm, select it's
value larger that the scaled range (not in use).
Alarmsoff
Negativehysteresisvaluedisablesalarmfunction.
Dec ➤➤
➤➤
➤
Decimal selection 0..3, i.e. 0.9, 0.99 or 0.999
Lo, Hi ➤➤
➤➤
➤
Lo andHi scalesdisplaytoinput signal 4..20 mA. Lo
valueisselectedforinput4mAandcorrespondinglyHi
value is for 20 mA input.
e.g. 4..20 mA = display Lo -100.. Hi +200
Filt➤➤
➤➤
➤
Display Filter. This fucntion stabiles display value
whenwidemeasuringrangeisused.
Filtervaluecanbesetbetween1(min)..0.010(max).
1.000 = no filter
0.200=normal filter
e.g. 0.2 =(1/5) one new measurement and 4 old
values or
0.1 = (1/10) one new + 9 old values (slower)
Alarms are controlled with the filtered value (filter
affects to alarms reaction time).
Inte ➤➤
➤➤
➤
Display intesity (brightness). You can change the
intensity with ▲▼-buttons. Hold ▼-key to decrease
intensityandviceversa.
Inmeasuringmodeintensitydecreasesautomatically
when input is under 6 mA.
TrF ➤➤
➤➤
➤
Transferfunctionselection.
Lin= normal fnction
Sqrt= square root function
Squarerootfunctionenablesevennegativeinput.This
is usefull in cases where e.g. flow goes backwards.
CFCo ➤➤
➤➤
➤
Access code for configuration mode. Access code is
formed with ▲▼★➤-keys. Code is formed with six
pushesoffrontpanelbuttons.Notinusewhencodeis
set to (★★★★★★) (factory default).
Ifconfigurationaccesscodeisforgotten,allthesettings
canbereturnedtofactorydefaults(notcalibration)by
holdingdownbuttons★and➤whileconnectinginput
signal 4..20 mA.

8
Yrittäjäkatu12
37100 NOKIA,FINLAND
Tel. [phone]
Fax. [phone] email [email protected]
http:// www.nokeval.com
Nokeval Oy
Calibration
When calibrating, accurate 4 and 20 mA signals are
needed.Thedeviceisfactorysuppliedcalibrated,
and it is scaled to display 0-100.0 unless ordered
differently.
CAL >
Ifthedevicedisplaysincorrectreadings(morethan
0.05%ofrange),itshouldberecalibrated.Before
doing that, ensure that the input signal is correct
(using a separate mA meter) and that the scaling
(Lo,Hi)isappropriate.
Enter configuration menu, select CAL and press ➤
key.Entercalibrationpassword112213,
▲▲▼▼▲★. “4_20” is displayed.
Feed a precise 4.000 mA signal to the device and
press ▼key. Wait until the display reappears. Then
feed20.000mAand press▲key.Calibrationvalues
arestored immediatelyandcannotbeundone.
Finally exit to the configuration menu with ★key.