Nokeval 2012 User manual

2012
2800-2012
910E/920E-2012
1000F-2012
1100F-2012
1800F-2012
For process inputs
User manual
1.12.2014
Firmware V1.5

INTRODUCTION
2012 is an input card for measurin mA or V
si nal or a potentiometer. The card can be
plu ed into the 2000 panel meter series,
2800 field meter series, 910E/920E lar e
panel meter series, or 575F/1000F/1100F/-
1800F lar e field display series.
The readin is displayed with six di its, if
desired. Fixed trailin zeros are available.
The card features a freely adjustable
lowpass filter, hold function, and tare
function. An external switch or relay contact
can be used to tri er the hold and tare
functions.
2012 supports several 2000 series auxiliary
cards: an analo output card, a serial
communications card, and two- or three-
relay alarm cards.
If the same device is equipped with two 2012
input cards, the combination is called 2212.
It is possible to calculate a simple
mathematical operation amon the channels.
About this manual
The next pa e shows a quick look at the
connectors.
Every series (small/lar e panel/field) has a
chapter of its own concernin installation and
power supply connections and how to start
the confi uration.
If the confi uration is performed usin the
display and buttons, refer to chapter User
interface.
Then, every card type has a chapter of its
own, ivin jumper settin s, connections,
and confi uration settin s.
Finally there is a table of technical
specifications.
Table of contents
Introduction.....................................................................................................................................2
Connections....................................................................................................................................3
Installin 2000.................................................................................................................................4
Installin 2800.................................................................................................................................6
Installin 910E/920E.......................................................................................................................8
Installin 1000F/1100F/1800F......................................................................................................10
User interface...............................................................................................................................13
Input card 2012-IN........................................................................................................................17
Output card 2000-OUT.................................................................................................................21
Serial card 2000-RS.....................................................................................................................23
Relay card 2000-RELx.................................................................................................................25
Specifications................................................................................................................................27
Manufacturer
Nokeval Oy
Yrittäjäkatu 12
FIN-37100 Nokia
Tel [phone]
Fax [phone]
WWW http://www.nokeval.com
2

CONNECTIONS
01 panel meter
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1 987
Slot A Slot B Slot C
Supply
volta e
800- 01 field meter
987
Slot A
Slot B
Slot C
-24V+
987
230VAC
PEL N
910E/9 0E- 01 large panel meter
Conf
Slot A
Slot B
Slot C
Supply volta e 2
3
4
1
+
-
PE
1000F/1100F/1800F- 01 large field meter
See installation chapter on pa e 11.
Cards
6
5
4
3
2
1
ExtSw
+Pot
+V
Com
+mA
+24V
2012
6
5
4
3
2
1
V
mA
Com
OUT
6
5
4
3
2
1
D1+
RS-485RS-232
D0-
TxD
Com
RxD
Com
RS
6
5
4
3
2
1
1
2
REL2
6
5
4
3
2
1
1
2
3
REL3
3

INSTALLING 000
This chapter ives instructions how to install 1/8 DIN panel meter
2012. The field meter 2800-2012, lar e panel meter 910/920E-2012
and the lar e field displays xxxF-2012 have chapters of their own.
Opening the enclosure
The enclosure has to be opened only, if the jumper positions are
chan ed or a card is added or removed.
The enclosure can be opened from either end. Openin from the front end is possible when the
meter is not installed in a panel. Pull the front bezel on the middle.
To open from the rear end, unscrew the four screws.
The base card with other cards can be withdrawn after openin the case.
Mounting
The meter is installed in a panel openin accordin to the picture, or in a standard 92x45 mm
openin . Use the two holders supplied to fasten the meter.
Connections
There is three slots for the cards, called A, B, and C. The
connections of these cards depend on the installed card
types. Every card type has a chapter of its own.
4
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1 987
Slot A Slot B Slot C
Supply
volta e

Supply voltage
The power supply is connected in a three-pole connector, that has terminals
numbered 7, 8, and 9. The supply is brou ht to terminals 7 and 9. The polarity does
not matter. The 24VDC model has reen connector block, while the 230VAC model
has a rey one.
The 230VAC model is built with a reinforced insulation, so a protective earth connection is not
needed.
The meter has internal pre-fuse. If an external is used, it should be at least 2AT for 24VDC
model and 500mAT for 230VAC model.
Other cards
See the chapters of the card types.
Configuration
The panel meter can be confi ured with many ways:
•By usin the front panel display and buttons. Usin the buttons is described in chapter User
interface.
•Via the RS-232 or RS-485 bus. Available only, if the device is equipped with a serial
communications card. Use the free Mekuwin software.
•Via the POL connector on the input card in slot A. Available only, if the device is NOT
equipped with a serial communications card. Suitable pro rammin cables include POL-
RS232 (for RS-232 port of a PC) and DCS772 (for USB port). Additionally an adapter POL-
3PIN is needed. Use the free Mekuwin software. Caution: Do not operate the 230VAC model
with no enclosure to avoid an electrick shock!
5
987
+L -N

INSTALLING 800
Mounting
First open the lid with the four plastic screws. The
four mountin holes in the corners are exposed.
Connections
Cable glands
There is three PG11 cable lands in the lower wall of the enclosure.
Power supply
In the 24VDC model the power supply is connected in the base card
terminals 7 and 9. The polarity does not matter. The connector is reen.
In the 230VAC model the Live is connected in the base card terminal 7 and
the neutral to terminal 8. The protective earth is connected in terminal 9. The
connector is rey.
6
987
- +
987
+L -N PE
163
180
130
113.5
987
Supply
volta e
Slot A
Slot B
Slot C

Cards
The card connections depend on the card types installed – refer to the chapters of the card
types. The terminal 1 is closest to the bottom.
Configuration
There are several ways to confi ure the meter:
•By usin the front panel display and buttons. Usin the buttons is described in chapter User
interface.
•Via the RS-232 or RS-485 bus. Available only, if the device is equipped with a serial
communications card. Use the free Mekuwin software.
•Via the POL connector on the input card in slot A. Available only, if the device is NOT
equipped with a serial communications card. Suitable pro rammin cables include POL-
RS232 (for RS-232 port of a PC) and DCS772 (for USB port). Additionally an adapter POL-
3PIN is needed. Use the free Mekuwin software. Caution: Do not operate the 230VAC model
with the enclosure open to avoid an electrick shock!
7

INSTALLING 910E/9 0E
Mounting
The lar e panel displays are installed in a rectan ular openin in the panel usin the two steel
holders provided. Clip the holders in the roove and ti hten the screw.
Dim 910E5 9 0E4 9 0E5
W1 303 417 507
H1 111 161 161
D2 80 80 80
H3 57 100 100
W4 291 408 498
H4 100 153 153
The openin dimensions are iven for a tolerance of +2/-1 mm.
Connections
First detach the lid of the connector room on the backside of the unit. It can be reco nized from
the two mouseholes in the lower ed e.
The connector blocks can be detached by pullin them off. In fact they must be detached to
allow ti htenin the connector screws.
8
1234
Openin
W1
H3 H2 H1
D2
H4
W4
Conf
Slot A
Slot B
Slot C
Supply volta e 2
3
4
1
+
-
PE

The power supply is brou ht to the lowest connector terminals 1 and 2. The polarity does not
matter. The enclosure may be earthed usin the terminal 4.
The card slot connections depend on the installed cards – refer to the chapters of the card
types. The terminal 1 is the one nearest to the back panel.
Configuration
There are several ways to confi ure the lar e panel meter:
•By usin the back panel display and buttons. Usin the buttons is described in chapter User
interface.
•Via the RS-232 or RS-485 bus. Available only, if the device is equipped with a serial
communications card. Use the free Mekuwin software.
•Via the POL connector on the input card in slot A. Available only, if the device is NOT
equipped with a serial communications card. Accessin the connector requires detachin the
electronics unit. Suitable pro rammin cables include POL-RS232 (for RS-232 port of a PC)
and DCS772 (for USB port). Additionally an adapter POL-3PIN is needed. Use the free
Mekuwin software.
9

INSTALLING
1000F/1100F/1800F
Mounting
External dimensions and mountin hole locations for 1000F, 1100F, and 1800F respectively:
Opening the enclosure
To access the electrical connections and the small user interface used for confi urin the unit,
the steel case has to be opened. First unscrew all the screws surroundin the display, then lift
off the black steel frame and the red plexi lass. Finally unscrew the screw that is located on the
ri ht hand side of the ri htmost di it. Now the display assembly may be turned away on its
hin es.
Connections
There is two PG11 cable lands on the lower wall of the enclosure allowin the cables to be
brou ht in.
The lar e field displays are available for two supply volta e ran es, called "24VDC" and
"230VAC". Moreover, the 230VAC model may be equipped with an auxiliary power supply or
not. If the aux power supply is installed, it is completely wired on the factory, but it affects where
the power supply cable is connected in. The aux power supply is used only on certain 1800F
models.
10
455, 625, 1025
500, 670 1045
188,250, 375
147, 210, 330
482, 650, 1030
120,130,
210

4VDC model
Brin the supply volta e to the connector indicated in the picture. A pre-fuse is not necessary,
but if one is used, it should be at least 2 AT. The protective earth is not required for electrical
safety, but will protect from EMI fields.
30VAC model with no auxiliary power supply
Brin the Live and Neutral wires to the electronics unit as in picture. Connect the Protective
Earth wire to the M4 screw usin the Faston connector provided - a Faston crimpin tool is
needed. A pre-fuse is not necessary, but if one is used, it should be at least 500mAT.
The power and si nal wires must be fastened usin cable ties or equivalent so that if one si nal
wire is detached, it can not touch any of the power supply wires, or vice versa.
30VAC model with an auxiliary power supply
11
0.0
Slot A
Slot B
Slot C
Supply
Electronics unit
Main enclosure
Flat cable to the lar e di its Tw o cable lands
9
8
7
Supply 24 VDC.
Free polarity.
Small display and buttons
Protective earth
Hined
display
assembly
0.0
Slot A
Slot B
Slot C
Supply
N
L
Supply volta e
100…240 VAC
or VDC.
Protective earth

Brin the Live, Neutral, and Protective Earth wires to the connectors mounted on the DIN rail.
The other power supply cablin is factory installed.
Cards
The card slot connections depend on the installed cards – refer to the chapters of the card
types. The terminal 1 is the one nearest to the back panel.
Configuration
There are several ways to confi ure the lar e field display:
•By usin the small display and buttons inside the main enclosure. Usin the buttons is
described in chapter User interface.
•Via the RS-232 or RS-485 bus. Available only, if the device is equipped with a serial
communications card. Use the free Mekuwin software.
•Via the POL connector on the input card in slot A. Available only, if the device is NOT
equipped with a serial communications card. Accessin the connector requires openin both
the main enclosure and the electronics unit, which will expose dan erous volta es and must
not be done if the supply volta e is hi her than 24 V. Suitable pro rammin cables include
POL-RS232 (for RS-232 port of a PC) and DCS772 (for USB port). Additionally an adapter
POL-3PIN is needed. Use the free Mekuwin software.
12
0.0
Slot A
Slot B
Slot C
Supply volta e
100…240 VAC
or VDC
PE
N
L
PE
N
L
Aux
pow er
230/12V
Tw o flat cables

USER INTERFACE
The panel meter front panel and the small display on lar e displays can be used to view the
readin s and to chan e confi uration settin s. The user interface has four states:
•Normal state – indicatin readin s.
•Operator menu – adustin the alarm levels.
•Confi uration state – chan in the confi uration settin s.
•Monitor state – indicatin troubleshootin readin s.
Normal state and the indicator LEDs
After switchin the power on, the user
interface is in normal state, indicatin
readin s. There is three modes for the
normal state, selected in the Master
confi uration menu, item Gen/Mode:
•Sin le: Indicates only one pre-selected
channel usin up to six di its. The channel
is selected in the confi uration menu
Master/Gen/Ch.
•Step: The leftmost di it on the display
indicates a channel number, and the four
ri htmost di its are indicatin the readin
of that channel. The channel can be
chan ed manually with buttons ^v.
•Scan: Like Step but the displayed channel
is automatically stepped once a second.
•Scan2...Scan5: Like Scan, but slower.
Indicator LEDs A1…A4 indicate the state of
the alarms on the optional relay card. A1 and
A2 follow the alarms on slot C. A3 and A4
follow the alarms on slot B. If the C slot is
equipped with a three-relay card, the
indicators A1 to A3 are used for it.
The alarms can be pro rammed to blink the
display when active.
Indicator LED M2 is lit when an external
contact connected in slot A is active.
Conf LED is lit when the user interface is in
the confi uration state.
* button may be used to perform tarin if
confi ured so on the input card menu, or for
resettin the alarms if confi ured so on the
relay card.
Operator menu
The operator menu allows quickly adjustin
the alarm levels on the relay card installed in
slot C without enterin the confi uration
state.
The operator menu is entered from the
normal state with the > button. If a password
has been set for the operator menu
(Master/Gen/AlCode), it has to be entered
now.
> button is used to advance from one level
settin to another. While the button is kept
pressed, the name of the level is displayed,
e. . AL2 = alarm level 2. After the last level,
> returns to the normal state.
13
*
A1 A2 A3 A4 M1 M2 Conf
LEDs
Display
Buttons

When the level is displayed, it may be edited
by pressin either ^ or v. One di it of the
display starts blinkin and the level can be
edited as described below in section
Confi uration state, editin floatin point
numbers. The editin is ended with the *
button.
Configuration state
Entering
In the normal state, press the * and ^
buttons to ether two seconds.
Select the slot to be confi ured usin the ^v
buttons. The options are Master, Slot A, Slot
B, and Slot C. Enter with the > button. The
contents of the menu depend on the card
type installed, and is described in the
chapter of that card type. The Master
confi urations affect the user interface and
the math channel, and are described later in
this chapter.
If a password has been set for the
confi uration menu, it has to be entered
now. The display will show Cod.0 and waits
for six button pushes. (If the password is
for otten, it may be reset by keepin * and
> pressed while switchin the power supply
on.)
Navigating
The menu is a hierarchical structure. Within
one menu you can move with the ^v
buttons. A submenu is entered with > and
exited with *.
Editing
Pressin the > button shows the value of the
settin and allows editin it.
Most data types are edited simply with ^v
buttons and exited with *.
Floating point numbers are edited usin
the buttons ^v>. Select the di it to be
edited or the decimal point with > and edit it
with ^v. The first di it can be edited to a
minus si n.
Setting passwords: First enable the
password by pressin ^ - Set will be
displayed. Then press >, and the display
shows Cod.0. Enter a series of six button
presses usin freely the four buttons. Then
re-enter the same series. If these matched,
Set is displayed a ain and you may exit with
*:llä. The password can not be ******.
The password is disabled by selectin v Off
instead of Set.
Lock and Free
Some items in the confi uration and monitor
menus accept Lock and Free commands.
The purpose of these depend on the menu
item.
The Lock command is iven by pressin and
holdin the > button and pressin the ^.
Before this, the item name must be in the
display, not the value.
The Free command is iven the same way
but usin v instead of ^.
Exiting
When all is done for this slot, exit from the
menu with * button. Select ^v Save (keep
the chan es) or Undo (discard the chan es)
14
Master
Slot A
Slot B
Slot C
*+^ >
^
v
Input settin s, see
chapter Input card.
Option card settin s,
see appropriate
chapters.
User interface settin s,
see below.

and press *. You will be in the slot selection menu. Select another slot or exit with *
button.
Monitor state
Monitorin means viewin some internal
values mainly for testin and
troubleshootin .
The monitorin mode is entered by pressin
* and v to ether. After that, a slot is
selected with ^v and entered with >. The
monitorin item can be chan ed with ^v.
The item name and the value are displayed
alternatin .
The last item in the monitor menu is Diag,
allowin viewin self-dia nostics messa es.
Press >. If nothin happens, there is no
active messa es. If happens, use ^v to see
if there is more messa es. Exit to the
monitorin menu with *.
The monitorin state is exited with *.
Master configuration menu
Gen/Mode
The display mode in the normal state. The
options are described above in section
Normal state and the indicator LEDs.
Gen/Ch
The channel to be displayed in the Sin le
mode. The channels are:
•1 = slot A readin
•2 = slot B readin
•7 = math channel
Gen/Bright
Display bri htness 1…15. Default value 7.
Does not affect the bri htness of the lar e
displays of models 910E/920E/575F/1000F/-
1100F/1800F.
Gen/CfCode
Password for the confi urations. If this is set,
the same password has to be entered when
next time enterin the confi uration state.
Gen/AlCode
Password for the operator menu. The alarm
levels may be quickly accessed from the
normal state, but if this password is set, it
must be entered first.
Math/From1
The channel to be used as the first operand
of the mathematical operation.
Math/From
The channel to be used as the second
operand of the mathematical operation. Not
used with the Sqrt function.
15
Master
Slot A
Slot B
Slot C
Gen
Math
*+^ >
^
v
^
v
Mode
Ch
Bri ht
CfCode
AlCode
From1
From2
Op
Dec

Math/Op
Mathematical operation. The result is placed
on channel 7.
The operation can be one of the followin :
•Off: No mathematical operation. Channel 7
is not included in the display scannin in
mode Scan.
•Sum: Sum of the channels From1+From2.
•Av : Avera e (From1+From2)/2.
•Diff: Difference From1-From2.
•Mul: Multiplication From1*From2.
•Div: Division From1/From2. Dividin by
zero will ive an undefined result.
•Min: Lesser of the two From1 or From2.
•Max: reater of the two.
•Sqrt: Square root from the channel
selected with From1. A ne ative value will
ive ne ative results.
Tip: a square of the value can be calculated
by selectin Mul operation and settin
From1=From2.
Math/Dec
The number of decimals to be displayed on
the math channel.
Master monitor menu
Mainch
The channel bein displayed.
Act
The state of the external contact and the
front panel button *.
16

INPUT CARD 01 -IN
Jumpers
The jumpers are set in factory and there is
no need to alter them. The correct positions
are shown in the picture.
Connections
A volta e or a current si nal
can be connected in the
input card but not both. A
volta e si nal is connected
in terminals 4+ and 3-.
An active (=remotely
powered) current si nal is
connected in terminals 2+
and 3-. On 2012-IN card, the current oes
throu h a 50 ohm resistor and approx 30
ohm self-resettin semiconductor fuse.
The terminals 1+ and 3- provide a 24 VDC
supply for a transmitter. A two-wire
transmitter is connected in terminals 1+ and
2-.
The potentiometer upper end is connected in
terminal 5, feedin 2.5 V excitation. The
lower end is connected in 3. The wiper is
connected in terminal 4.
If usin two 2012-IN cards, please note that
they share the common round (terminals 3
are internally to ether).
An external switch may be connected in
terminals 6+ and 3-. This card will pull the
terminal 6 volta e to approx +5 V via
10 kohm. The external contact (NPN or
mechanical) may then pull this volta e to
round. The switch may be pro rammed to
activate the hold function, tare the input,
reset the alarms, or to bypass the lowpass
filter.
Operation
The microcontroller sets the multiplexer
"Mux" to measure the V or mA input
accordin to the confi uration settin s. The
input is measured usin a 24-bit analo -to-
17
6
5
4
3
2
1
ExtSw
+Pot
+V
Com
+mA
+24V
POL
J2
J5
J6
ExtSw
mA
Gnd
V
Pot
+24V
A/D conv
Mux
mA
V/Pot
Pot. excitation 2.5V
5
4
2
Lopass
& Hold Scalin
+
Tare
-
+
Mea
Dead
Sca
Ch 1
3

di ital converter. The factory-adjusted
calibration values are used to convert the
result to an accurate mA or V readin . This
unprocessed readin can be seen in the
monitor menu, item Mea.
If the di ital lowpass filter is enabled, the
readin is processed with it. Likewise if the
Hold function is active, the readin is locked.
The readin is scaled usin up to ten user-
entered scalin points Mea/Sca to a scaled
(en ineerin ) readin . If the tare function is
active, the current tare value is subtracted.
The current value is copied to the tare value
memory when a switch pro rammed as a
tare switch is activated. The tare value is
stored in an EEPROM memory and is
retained even if the power supply is cut off.
The last element in the chain is Dead zone.
It allows roundin very small readin s to
zero, to et a empty wei h to indicate zero
readin despite of a small tare error.
The readin processed this way is
observable in the monitor menu item Sca,
and it is also stored to the channel table to
be used on the display and analo and serial
outputs and alarms. The card in slot A stores
the readin to channel 1 and card in slot B to
channel 2.
Configuration menu
In/Setup/Range
Defines the physical input si nal type.
Contains predefined ran es 0-20mA, 4-
20mA, 0-5V, and 0-10V, and free scalin
ran es mA, V, and Pot (=potentiometer).
Predefined ranges
When usin one of the predefined ran es 0-
20mA, 4-20mA, 0-5V, or 0-10V, the scalin
to en ineerin units is done by ivin the
scaled endpoints in menu items Lo and Hi.
When the input si nal is at the low end of the
ran e, the scaled (displayed) readin
corresponds to Lo settin .
Free scaling
When usin free scalin ran es mA, V, or
Pot, the In/Setup/Pts settin defines how
many scalin points are desired. It can be
adjusted from 0 to 10.
If 0 points is selected, the readin is not
scaled at all, but milliamps or volts are
displayed as are. A potentiometer will ive
unscaled readin s 0 to 100.
Two point scalin is achieved by settin Pts
to 2. Settin s Mea1, Sca1, Mea2, and Sca2
will appear in the menu. Mea1 and Sca1
form a pair: when the physical input si nal
corresponds to Mea1, the scaled
(en ineerin ) readin will be Sca1. The
same applies for the other pair, and linear
interpolation and extrapolation is used
elsewhere.
An example how to scale 4-20mA si nal to
be displayed 0-100::
Pts=2
Mea1 = 4 (mA)
Sca1 = 0 (scaled)
Mea2 = 20 (mA)
Sca2 = 100 (scaled)
A non-linear behaviour is obtained by usin
more than two points. The points can be
18
Master
Slot A
Slot B
Slot C
Setup
Filter
*+^
>
^
v^
v
Ran e
Lo
Hi
MeaMin
Dec
Lopass
Disable
Dead
Hold
More
Tare
Pts
Mea1
Sca1
Mea2
Sca2
Act
Value
Visible when Ran e
is 0-20mA, 4-20mA,
0-5V, or 0-10V.
Visible, when
Ran e is mA, V, or
Pot.
^
v
>
In
>

used freely, but the Mea settin s must be in
ascendin order: Mea1 is smaller than Mea2
etc.
If a Lock command is iven to a Mea settin
(Mekuwin: L button, user interface: see pa e
14), the current unscaled readin is copied
to the value of this Mea settin . The
correspondin desired scaled readin can
then be manually entered to the associated
Sca settin . This way the scalin may be
teached.
In/Setup/MeaMin
The smallest acceptable si nal in milliamps
or volts. If the si nal oes below this, the
readin is considered to indicate fault and
dashes are displayed and all alarms
followin this readin are activated.
For example, with a 4-20mA input si nal, it is
advisable to set this to 2, so that if the
current loop is broken, the alarms are
activated.
In/Setup/Dec
The number of decimals to be displayed
after the decimal point. If the selected
number does not fit in the display, the
decimals are automatically temporarily
decreased.
If Dec is set ne ative, no decimals will be
displayed, but the last di its are rounded to
zero. E. . if Dec=-1, the display will be
rounded to the nearest 10. This affects the
display only.
In/Filter/Lopass
Third order di ital lowpass filter, that is used
to reduce noise and fluctuation in the
readin . Set the time constant in seconds –
in that time the filter has passed throu h
63% of a step chan e. To disable, set to 0.
In/Filter/Disable
Lowpass filter bypass switch selection. The
options are:
•Off: Not used.
•FP: Front panel * button works as a
bypass switch.
•ExtSw: An external contact connected in
slot A works as a bypass switch.
•Both: Both of the above switches work.
When the selected switch is activated, the
lowpass filter is switched off. Can be used,
when the input si nal is chan ed and the
filtered readin is desired to jump to that.
In/More/Dead
Dead zone around zero. If the absolute value
of the scaled readin is smaller than the
Dead settin , the readin is rounded to zero.
This can be used to et a zero readin in a
wei h even if there is a small tare error.
If Dead is set to 0, only ne ative readin s
are forced to 0. If Dead is set ne ative (e. .
-1.0), the function is disabled.
In/More/Hold
Hold switch selection:
•Off: Not used.
•FP: Front panel * button works as a hold
switch.
•ExtSw: An external contact connected in
slot A works as a hold switch.
•Both: Both of the above switches work.
While the hold switch is active, the readin is
locked and keeps the same value.
In/Tare/Act
Tare switch selection:
•Off: Tare function disabled.
•Front panel * button works as a tare
switch.
•ExtSw: An external contact connected in
slot A works as a tare switch.
•Both: Both of the above switches work.
When the tare switch is activated, the current
scaled readin is captured and stored in the
tare value memory. The tare value will then
be subtracted from every readin .
The tare value is stored in an EEPROM
memory and will be retained also when the
meter is powered down.
The tare value is captured and stored only
once when the switch is activated. Keepin
the switch active will not cause successive
tarin s.
If this settin is set to Off, the tare value will
not be subtracted from the readin anymore.
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Monitor menu
Mea
The unscaled readin in
milliamps/volts/percents dependin on the
input ran e.
If a Lock command is iven to this item, the
meter stops updatin the Mea value and
allows it to be chan ed manually. This way
the operation of the scalin , analo outputs,
alarms, etc may be tested with no need to
feed in different physical si nals. The normal
operation is restored with a Free command.
Sca
The scaled readin , that has also one
throu h the lowpass filter, tare subtraction
and dead zone function.
Diag
•EEPROM: Not used.
•ADC: The A/D converter is not workin .
The input card needs service.
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