YOKOGAWA ADMAG AXR - Page 158

12-3
IM 01E30D01-01EN
<12. OUTLINE>
Totalizer Display Function (*2):
Theowrateiscountedonecountatatimeaccord-
ing to the setting of totalization pulse weights. For
forwardandreverseowmeasurementfunctions,
thetotalizedvaluesoftheowdirection(forwardor
reverse)andtheowdirectionaredisplayedonthe
indicator together with the units. The difference of
totalized values between the forward and reverse
owratecanbedisplayed.Totalizationforthere-
verseowrateiscarriedoutonlywhen“Forwardand
reverseowmeasurementfunctions”isselected.
Damping Time Constant (*2):
The time constant can be set from 1.0 second to
200.0 seconds (63% response). The default is 5
seconds.
Whenthedampingtimeisshort,theoutputuctu-
ates. Set the time to 5 seconds or more for control
loop.
Span Setting Function (*2):
Spanowscanbesetinunitssuchasvolumeow
rate,massowrate,time,orowratevalue.The
velocity unit can also be set.
Volume Flow Rate Unit: kcf, cf, mcf, Mgal (US), kgal
(US), gal (US), mgal (US), kbbl (US)*,
bbl(US)*,mbbl(US)*,μbbl(US)*,Ml
(megaliter), m
3
, kl (kiloliter), l (liter), cm
3
Mass Flow Rate Unit (Density must be set): klb
(US), lb (US), t (ton), kg, g
Velocity Unit: ft, m (meter)
Time Unit: s (sec), min, h (hour), d (day)
* “US Oil” or “US Beer” can be selected.
Pulse Output (*1)(*2):
Scaled pulse is output one by one according to the
setting of pulse weight.
PulseWidth:Duty50%orxedpulsewidth(0.05,
0.1, 0.5, 1, 20, 33, 50, 100, 200, 330,
500, 1000, 2000 ms) can be selected.
Output Rate: 0.0001 to 10,000 pps (pulses per
second)
Multi-range Functions (*1)(*2):
Automatic range switching
Whentheowrateexceeds100%oftherange,
transition to the next range (up to two ranges) is
carried out automatically. Range switching can be
conrmedbythestatusoutputandontheindicator.
Forward and Reverse Flow Measurement Func-
tions (*1)(*2):
Flows in both forward and reverse directions can be
measured.Thereverseowmeasurementcanbe
conrmedbythestatusoutputandontheindicator.
Totalization Switch (*1)(*2):
The status output is carried out when a totalized val-
ue becomes equal to or greater than the set value.
Preset Totalization (*1)(*2):
The parameter setting enables a totalized value to be
preset to a setting value or zero.
Alarm Selection Function (*2):
AlarmsareclassiedintotheSystemAlarms(hard-
ware failure), Process Alarms (such as Signal
OverowandAdhesionAlarm),SettingAlarms,and
Warnings. Process Alarms and Setting Alarms can be
activated or deactivated for each item. The current
output for an alarm can be selected from the follow-
ing settings. If any System Alarm occurs, turn the
power off and back on again to return to the normal
condition.
System Alarm: 21.6 mA or more, 3.2 mA or less
Process Alarm, Setting Alarm:
21.6 mA or more, 20.5 mA, HOLD
 (xedtothecurrentvaluebefore
the alarm), 4 mA, 3.8 mA, 3.2
mA or less.
The default settings of each alarm are as follows:
Standard
Optional
code C1
System Alarm
21.6 mA or more 3.2 mA or lessProcess Alarm
Setting Alarm
Note: In the case of style: S1 with optional code C1, the
current output is set up to 3.8 mA during Process
Alarms and Setting Alarms.
NE-107 Alarm Message (*2):
Alarmsareclassiedinto4categoriesbyNAMUR
NE-107 and can be displayed.
-F: Failure
-C: Function check
-S:Outofspecication
-M: Maintenance required
Alarm Output (*1)(*2):
Alarms are generated only for the items selected
via the ‘Alarm Selection Function’ if relevant failures
occur.
Self Diagnosis Functions (*2):
When an alarm is output, details of the System
Alarms, Process Alarms, Setting Alarms, and Warn-
ingsaredisplayedtogetherwiththespecicdescrip-
tion of corresponding countermeasures.
Resultsofmeanowmeasurementduringagiven
period, etc. can be checked by using parameters.
FlowRateUpper/LowerLimitAlarms(*1)(*2):
Ifaowratebecomesoutofthepredetermined
range, the alarm output is generated.
Electrode Adhesion Diagnosis Function (*1) (*2):
This function enables checking of the adhesion level
of insulating substances to the electrodes. Depend-
ingonthestatusofadhesion,usersarenotiedbya
warning or an alarm via status outputs.
While adhesion diagnosis is being carried out (ap-
proximately 5 minutes), a current of 4 mA is output
becausetheowmeasurementisnotperformed.
Adhesion diagnosis should only be carried out when
theuidvelocityiscompletelyzerobyclosingthe
valve.
When adhesion diagnosis is carried out, change the
controllooptothemanualmoderst.
Data Security during Power Failure:
Data (parameters, totalization value, etc.) storage by
EEPROM. No back-up battery required.
Low Cut (*2):
In this function, the values of the current output along
with LCD indication, totalization, and pulse, which are
correspondingtosettingspanof0to20%,arexed
at0%(includingreverseow).Thedefaultsettingis
3%.
When the Low Cut point is small, the incorrect output
mayoccurattheowrateofzero.SettheLowCut
point to 3% or more. If the span is small, the damping
timeisshortortheuidislowconductivity,theincor-
rectoutputmayeasilyoccurattheowrateofzero.