ISOMAG ML 252 User manual

OPERATING AND INSTALLATION MANUAL
CONVERTER
ML 252

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qIntroduction _______________________________________________________________________________________pag.3
§Symbols Used on the manual ____________________________________________________________________pag.3
§Overall dimensions _____________________________________________________________________________pag.4
qTechnical characteristics of converter ______________________________________________________________pag.5
§Electrical characteristics_________________________________________________________________________pag.5
§Environmental conditions of use__________________________________________________________________pag.5
§Operative temperature__________________________________________________________________________pag.5
§Measure and consumption ______________________________________________________________________pag.6
qElectrical connections______________________________________________________________________________pag.7
§Output on/off 50Hz _____________________________________________________________________________pag.7
qStart up and maintenance of the instruments_______________________________________________________pag.8
§Device switch on ______________________________________________________________________________pag.9
§Batteries power supply__________________________________________________________________________pag.9
qHow to access at the instrument functions ________________________________________________________ pag.10
§User interface ________________________________________________________________________________ pag.10
§Access codes _________________________________________________________________________________ pag.10
§Converter visualisation pages __________________________________________________________________ pag.11
§Flags interpretation and led_____________________________________________________________________ pag.12
§Converter key board___________________________________________________________________________ pag.13
§Functions description __________________________________________________________________________ pag.14
§Access to the configuration menu _______________________________________________________________ pag.17
qProgramming functions ___________________________________________________________________________ pag.19
§Functions description __________________________________________________________________________ pag.19
qAlarm messages __________________________________________________________________________________ pag.24
§Causes and action to be taken __________________________________________________________________ pag.24
§Anomalies codes ______________________________________________________________________________ pag.24
APPENDIX 1
Batteries substitution ______________________________________________________________________________________ pag.25
INDEX

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Symbols Used on the manual
This manual is integral part of the product. Read carefully the instructions contained it
since it contains important indications for a safe of use and maintenance.
Technic
al information and relative products in this manual could undergo modifications
without any previous notice.
The flow meter must be used for what it has been built for. The improper use, possible
tampering of the instrument or parts of it and substitutions
of any not original
components, makes the warranty to decay automatically.
The manufacturer is considered responsible only if the instrument in used in his original
configuration.
The reproduction of the present manual and of possible software supplied
with the instrument it’s strictly forbidden
ATTENTION
WARNING
PRECAUTIONS
DANGER ELECTRIC SHOCK
INTRODUCTION

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125
112 97
OVERALL DIMENSIONS

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TECHNICAL CHARACTERISTICS
OPERATING TEMPERATURE
CONVERTER
Ambient Temp.
Min. Max
°C °F °C
°F
-10*
-14*
50
122
ELECTRIC CHARACTERISTICS
Classification of the instrument: class I, IP 67, category of installation II
Power supply
version Power supply voltage Power supply frequency Max power Max Current
LITIUM
BATTERY 3,6 V –16,5 A/h
---
INPUT/OUTPUT ISOLATION
qInput/output are insulated up to 500V
q
Port RS 232 NON is not insulated
ENVIRONMENTAL CONDITIONS OF USE
qThe instrument can be installed inside or outside buildings
qAltitude: from –200 a 6000 m (from -656 to 19685 feet)
qHumidity range: 0÷100% (IP 67)
qLine voltage range: (see table on technical characteristics)
* For discontinuous use, the installation of heating
resistance is necessary

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The converter can be used in two different modes:
qwith continuous sampling
qwith sampling to preset unit of time.
qCONTINUOUS SAMPLING (pic.1) (ENERGY SAVING OFF)
In this mode the converter make the measure in accordance with the classical diagram of the
flow meter; the consumption of the system, with any diameter of the sensor is 0,05 W ;the
life of battery is about 1 month (6 with 6 battery)
The accuracy of the system is definite in those conditions.
qSAMPLING TO PRESET UNIT TIME ( pic. 2 ) ( ENERGY SAVING ON )
This mode works sampling the range to intervals of preset time (see MEASURE menu, func.
3.5); it allows a great saving of energy
In this conditions the consumptions are:
Sampling
time (s) Battery life -n° 1 battery (years) Battery life –“ N “ batteries (years)
10,7 0,7 * N
21.3 1.3 * N
52.1 2.1 * N
10 2.7 2.7 * N
15 3.0 3.0 * N
>= 30
5
5.0 * N
Whatever the results ,
the maximum time is
limited to 10 years
FLOW RATE
SAMPLE
FREQUENCY
SAMPLE
TIME
tt
FLOW RATE
SAMPLE
FREQUENCY
PIC 1 PIC 2
ATTENTION:
the consumptions on the table are wit
hout optional IF2 cable connected to the
converter. This device accelerate the consumption of the batteries even if the instrument is in standby
mode
. Recommends to disconnect the IF2 cable from the converter after every his uses or
switch off the converter by the dip-switches (see page 9)
MEASURE/ CONSUMPTIONS

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ELECTRICAL CONNECTIONS
4 poles : OUT ON/OFF
OUT 1 = Yellow ( terminal C )
OUT 2 = Pink ( terminal D )
50 V
Out common : Cyan ( terminal B )
Technical characteristics
qOpto-insulated output ( Opto-MOS )
qMaximum switching voltage: 40 Vdc
qMaximum switching current: 100mA
qMaximum Ron = 70 Ohm
qMaximum switching frequency
( loadRL=240Ω, VOUT=24Vdc): 32 Hz
qInsulation from other secondary
circuits: 500 Vdc
6 poles
q
A ( ORANGE ) : external power supply
8-35 VDC
qB ( GREEN ) : GROUND
qC ( BROWN ) : RS232 –TX
qD ( VIOLET ) : RS232 –RX
qE ( BLU ) : to IF22USB interface
qF : not connected
IF22

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Before to close the converter verify the following:
qSealing surfaces mast be clean
qTighten the screw in cross mode up to about 12/13 Nm
qRepeat the tightening operations after 2/3 minutes
1
23
4
INSTRUMENT START UP AND MAINTENANCE
Clean surfaces
Before to switch on the instrument verify the following:
qPower supply voltage must correspond to that specified in the name plate
qElectric connections must be done as described at page 8-10
qGround connections must be done
Verify periodically:
qTh
e integrity of the power supply cables, wiring and other electrical parts
connected
qThe integrity of the instrument’s housing (this must not have bruises or other
damages that may compromises the hermetical sealing)
qThe tightening of the sealing elements (cable glands, covers, etc.)
q
The integrity of the front panel (display and keyboard), damages may
compromise the sealing
qThe mechanical fixing of the instrument on the pipe or on the wall stand
Tighten in cross mode

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batteries pack
Batteries Power Supply
qBatteries quantity : N° 1 standard ( + N° 1 optional )
SWITCH-ON DEVICE
Switch battery 1
ON/OFF SWITCH 1-2
INSTRUMENT START UP
Switch battery 2

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Some functions in the converter are enabled by the access
codes. The information of this manual is related to all the
functions available with L2 level. All the functions available
through higher level are protected and reserved to the
service. Description of the L2 access code
(menu “11 Internal data” pos. 11.1)
qwith code L2 = 00000
(with this code only) you
disable the request of code L2
NOTE: the availability of the functions is related to the
selected block
q*with L2 customised
(freely chosen by the user) you
can proceed programming all the functions up to L2
security level, entering its code whenever you enter the
Main menu
*ATTENTION:
take note very carefully of the customised
code you have chosen, since
there is no way for the user to
retrieve it if it is forgotten
The converter is delivered with access code L2:
11111
and with the "Quick start menu" enable. Press the key
to access to the "Quick start menu" from one of the
visualization pages
The “Quick start menu” may be set without entering any
access code (see example 1 on page 17).
FACTORY PRESETTINGS
USER INTERFACE
ML252 is available only in blind version, therefore
the only way to view and set
the functions of instrument it’s the serial interface IF22
ACCESS CODE