Fema Smart DCM, Smart SN Operating Instructions Manual
® U.S Registered Trademark
Copyright © 2007 Honeywell Inc. • All Rights Reserved MU2B-0328GE51 R0207A
Smart DCM/SN
ELECTRONIC PRESSURE SWITCHES AND TRANSMITTERS
OPERATING INSTRUCTIONS
GENERAL
Honeywell FEMA's Smart DCM Electronic Pressure Switches
and Smart SN Electronic Pressure Transmitters are microprocessor-controlled pressure measurement devices for
relative pressure measurements (-1…+1 bar / 0…40 bar).
With their high-performance stainless steel sensor material,
they are suitable for a wide range of liquid media or gases in
industrial applications. They are screwed (G1/2”) directly into
the line / vessel to be monitored.
BEFORE PROCEEDING!
VALIDITY
These Operating Instructions pertain to measuring systems
containing Smart SN Pressure Transmitters / DCM Pressure
Switches. Device software must be version 1.30 or higher.
QUALIFIED PERSONNEL AND USAGE
Use only these Operating Instructions (and the corresponding
Mounting Instructions) to set up and operate the device. Only
qualified personnel are permitted to install, commission,
operate, and maintain the device. This device may be used
only in applications and under operating conditions described
in these Operating Instructions.
TECHNICAL DATA
Materials
Parts contacting medium Stainless steel (1.4571)
Chemical resistance 4C4 as per EN 60721-3-4
HMI PA66 GF25
Total weight 300 g without, 350 g with HMI
Ambient (operating) temperature and humidity
Versions (non-HMI) -20...+80 °C
Versions (HMI) -20...+70 °C
Humidity 0...95% r.h., non-condensing
Temperature of medium -30...+100 °C (≤ 16 bar models)
-40...+100 °C (> 16 bar models)
Storage temperature
Versions (non-HMI) -40...+80 °C (≤ 16 bar)
-40...+100 °C (> 16 bar)
Versions (HMI) -30...+80 °C
Climate class
Indoors 4K4H as per EN 60721-3-4
Outdoors 3K8H as per EN 60721-3-3
Mechanical stability
Vibration 20 g as per IEC 68-2-6 (up to
2000 Hz)
Mechanical shock 100 g as per IEC 68-2-27
Device resistance / accuracy (combined non-linearity,
hysteresis, and repeatability at 20 °C)
P ≤ 16 bar P > 16 bar
overpressure safety 2x P
nominal
2x P
nominal
burst pressure 4x P
nominal
10x P
nominal
sensor type piezo thin-film
accuracy
max. ±0.8% FS
±0.5% FS (typ.)
max. ±1% FS
±0.6% FS (typ.)
Pressure meas. range 0…40 bar (rel.), -1…1 bar (vac.)
Cycle time 100 ms
EMC according to EN 61326
Protection class 2 as per EN 61010
Protection rating (non-HMI) IP67 as per EN 60529-2
Protection rating (HMI) IP65 as per EN 60529-2
Process connection G1/2" external thread
Electrical connection 4-prong A-coded M12x1 plug
Switch
Output, high level V
SUPPLY
minus 2 V (min.)
Output, low level GND plus 0.5 V (max.)
Reaction time max. 300 ms
WARN output voltage passive: V
SUPPLY
- 2 V
active: ≤ 0.5 V
Transmitter (analog) output
Current (2-wire) 4…20 mA
Voltage / current (3-wire) 0/2...10 V, 0/4...20 mA
V
SUPPLY
(2-wire) 18…35 Vdc
V
SUPPLY
(3-wire) 18…35 Vdc, 24 Vac +10%/-20%,
max. 50 mA
Current output (max. load) (V
SUPPLY
- 16 V) / 22 mA
(max. error ±0.25% FS)
Voltage output (min. load) 15 kΩ (max. error ±0.25% FS)
Transient response approx. 200 ms
Span, offset, and long-term drift (within temperature
compensation range of 0…80 °C)
max. typical
temp. effect on span ±0.3% FS / 10 K ±0.2% FS / 10 K
temp. effect on offset ±0.3% FS / 10 K ±0.2% FS / 10 K
long-term drift* ±0.3% FS / year ±0.2% FS / year
SMART DCM SWITCH – OPERATING INSTRUCTIONS
MU2B-0328GE51 R0207A
2
DCM SWITCH
SEQUENCE OF SCREENS
MONITOR FUNCTION
OUTPUTSET-PT RESET-PT
AUTO-0 SET ZERO RESET 0
PRESSURE,
STATE
SET-PT.
WELCOME
RESET-PT. MONITOR FUNCTION DROP-IN DROP-OUT
MESSAGE MESSAGE
DROP-IN DROP-OUT
PEAKS
UNIT LANGUAGE BACKLIGHT REFRESH ROTATE CONTRAST
DISPLAY
CLEARMIN. MAX. TEMP. SIMUL. SET CODE RESET
EXTRAS
ENTER
CODE
GO TO
CONFIRM
A
LL
SETTINGS
PLAUSIBLE
?
NO
Y
ES
SET-PT. RESET-PT. MONITOR F UNCTION DROP-IN DROP-OUT CODE SIMUL. STORING...
DISPLAY LEVEL
PARAMETRIZATION LEVEL
CODE
ERROR
START
CONFIRMATION LEVEL
Fig. 1. Sequence of screens - Overview (DCM)
Devices equipped with an HMI (Human-Machine-Interface)
feature pushbuttons and a display, allowing easy
configuration by means of a menu structure. The menu
structure is divided into the following segments:
• The START SCREEN;
• The DISPLAY LEVEL (where information including the
current pressure and parameterized values are shown but
cannot be edited);
• The CODE area (where you will have to enter the correct
four-digit CODE in order to proceed any further);
• The PARAMETRIZATION LEVEL (where you can edit
various different parameters);
• A ERROR-CHECKING area (where the device will check
the plausibility of your values and, if necessary, redirect
you back to the PARAMETRIZATION LEVEL); and
• The CONFIRMATION LEVEL (where you can review your
edited values before permanently storing them).
START SCREEN
Within 10 seconds of powering-up the device, an initial screen
– the START SCREEN - will appear briefly (see Fig. 2).
Startup
Fig. 2. Start screen
You will then be automatically directed to the DISPLAY
LEVEL.
DISPLAY LEVEL
In the DISPLAY LEVEL, you can view the current pressure as
well as the various different user-settings currently in force.
Reset-pt.
Monitor Function
Drop in
delay
0s
Drop
out delay
0s
4.00bar Window N.C.
MENU MENU MENU MENU MENU
-0.90
bar
Closed
MENU
NEXT
PREVIOUS
NEXT
NEXT
NEXT
NEXT
NEXT
PREVIOUS
PREVIOUS
PREVIOUS
PREVIOUS
PREVIOUS
Set-pt.
5.00bar
MENU
NEXT
PREVIOUS
ESCAPE ESCAPE ESCAPE ESCAPE ESCAPE ESCAPE
Fig. 3. DISPLAY LEVEL
ENTERING THE ENTRY CODE
In order to gain access to the PARAMETRIZATION LEVEL
(where you can edit values), it is first necessary to show that
you have the requisite authorization by entering the correct
four-digit ENTRY CODE (default: 0000).
CODE
NOT
V
ALID
Put code
0000
OK
-
+
0
Put code
0000
-
+
8
Put code
0000
-
+
9
Put code
0009
-
+
0
Put code
0009
-
+
1
Put code
0009
-
+
4
Put code
0009
-
+
5
ESCAPE
OK OK
LEFT LEFT LEFT
OK OK OK OK
Put code
0000
-
+
1
OK
LEFT
LEFT LEFT LEFT LEFT
Fig. 4. Entering the ENTRY CODE
SMART DCM SWITCH – OPERATING INSTRUCTIONS
MU2B-0328GE51 R0207A
3
PARAMETRIZATION LEVEL
Once you have successfully entered the ENTRY CODE and
thus gained access to the PARAMETRIZATION LEVEL, you
can edit values and reconfigure the device.
NOTE: The currently set option (e.g. "yes," "no," "window
monitor", etc.) is always marked in the display
screen with a small dot to the left (see Fig. 5).
Monitor
Max.
OK
Window
ESCAPE
Monitor
Max.
Window
ESCAPE
OK
DOT
Fig. 5. Dot indicating present setting
SET-PT.
In this screen, you can select the set-point. This is defined as
the pressure at which you want the device to switch.
The default setting is 60% of full-scale.
ERROR MESSAGE: "VALUE OUT OF RANGE"
If you have entered a set-point outside of the device's
specified pressure measurement range or which is for any
other reason not rational, this error message will appear,
whereupon you should then enter a correct value.
RESET-PT.
In this screen, you can select the reset-point. This is defined
as the pressure at which you want the device to switch back.
The default setting is 40% of full-scale.
ERROR MESSAGE: "VALUE OUT OF RANGE"
If you have entered a reset-point outside of the device's
specified pressure measurement range or which is for any
other reason not rational, this error message will appear,
whereupon you should then enter a correct value.
OUTPUT
MONITOR
Here, you can choose between three types of monitors: min.,
max., and window.
• Min.;
• Max.;
• Window;
See Fig. 7 on page 5 for an explanation of the meanings of
these different settings.
The default setting is "Max."
FUNCTION
Here, you can choose the type of action you want the DCM
Switch to have:
• N.O.: Normally-open switch (meaning: when the switch is
activated, it will CLOSE); or
• N.C.: Normally-closed switch (meaning: when the switch
is activated, it will OPEN).
See Table 2 and Fig. 7 on page 5 for more information.
The default setting is "N.O."
AUTO ZERO
The purpose of the auto zero function is to allow the user to
adjust the device to local ambient atmospheric pressure and
to compensate for drift. To use this function properly, the
device must be mounted in the application and the pressure
sensor exposed to local ambient atmospheric pressure (i.e.
0 bar relative pressure).
• Yes: The device takes the current local ambient
atmospheric pressure as its zero.
• No: The device setting remains unchanged.
The default setting is "No".
SET ZERO
The difference between the pressure value you enter in this
screen and the pressure which the device is currently
measuring will be taken as the offset. This offset can be reset
to zero using the reset zero option (see section "Reset Zero"
below).
The default setting is the pressure which the device is
currently measuring (meaning that the offset is then zero).
ERROR MESSAGE: "VALUE OUT OF RANGE"
If you have set a zero outside the permissible range (±25%
full-scale), this error message will appear, whereupon you
should then enter a correct value.
RESET ZERO
Here, you can reset the zero:
• Yes: The pressure offset will be set to zero.
• No: The device setting remains unchanged.
The default setting is "No".
DROP-IN
Here, you can select the drop-in value. See also Fig. 8.
Possible values range from 0 to 99 seconds.
The default setting is "0" seconds.
DROP-OUT
Here, you can select the drop-out value. See also Fig. 8.
Possible values range from 0 to 99 seconds.
The default setting is "0" seconds.
PEAKS
Here, you can view the historical max. and min. measured
pressures as well as the max. measured temperature
(historical = measured since the device has been put into
operation / since the last time the peaks were cleared).
If desired, by proceeding to "Clear" and choosing "yes," you
can also permanently erase all such values. All such peaks
will then be erased and the recording of peaks will be reinitiated.
DISPLAY
Here, you can select/alter various modes of displaying screen
information.
UNIT
Here, you can choose the units in which the device displays
pressures:
• bar: All pressures will be displayed in bars.
• Pa: All pressures will be displayed in Pascals.
• Psi: All pressures will be displayed in pounds / in2.
The default setting is "bar".
LANGUAGE
English is the only supported language.
SMART DCM SWITCH – OPERATING INSTRUCTIONS
MU2B-0328GE51 R0207A
4
BACKLIGHT
Here, you can select how the device's screen backlight
should operate:
• Always: The backlight will remain ON at all times.
• Demand: The backlight will come ON whenever the
device's keys are operated, and remain ON for 25 s.
• Never: The backlight is shut OFF permanently.
The default setting is "Never".
REFRESH
Here, you can set how often (in seconds) the screen contents
should be refreshed (i.e. refilled with freshly-measured data).
Possible values range from 1 to 9 seconds.
The default setting is "1" sec.
ROTATE
Here, you can permanently rotate (by 0°, 90°, 180°, or 270°)
the orientation in which the screen's contents are displayed.
This is for easier viewing / enhanced legibility.
The default setting is "0" degrees (i.e. screen contents vertical
when device mounted in upright position).
CONTRAST
Here, you can choose the degree of contrast with which the
screen's contents are displayed:
• Min.: The contrast is decreased to its minimum value;
• Mean: The contrast is set to its mean value;
• Max.: The contrast is increased to its maximum value.
The default setting is "Mean".
EXTRAS
SIMUL. (= SIMULATION MODE)
The simulation mode allows the user to test the device within
the application without actually applying pressure.
When the simulation mode is initiated, the device's diagnostic
features are not active, and use of the device in an active
safety application is impossible.
After leaving the simulation mode and returning to the normal
operating mode, the device is again ready for use in safety
applications.
• Yes: The simulation mode is started.
• No: The device remains in its normal operating mode.
The default setting is "No".
WARNING
After you have completed testing in the simulation mode, do
not forget to return to this screen and re-instate the active
operating mode.
SET CODE
Here, you can change the ENTRY CODE. After leaving the
PARAMETRIZATION LEVEL and proceeding through the
CONFIRMATION LEVEL, the new ENTRY CODE will then be
in effect.
RESET
Here, you can re-instate all factory (i.e. default) settings:
• Yes: All factory settings are re-instated.
• No: currently-set values are retained.
PLAUSIBILITY CHECK
Upon attempting to leave the PARAMETRIZATION LEVEL,
the device will determine two checks to determine the
plausibility of your values.
ERROR MESSAGE: "MIN. DISTANCE BETW. SET-PT. AND
RESET-PT. IS 0.5% FS. PLEASE CORRECT PARAMS"
The difference between the set-point and the reset-point will
be checked. If the distance is too small (i.e. less than 0.5% of
the full-scale), this error message will appear.
ERROR MESSAGE: "OFFSET MUST BE BETWEEN -25%FS &
+25%FS. PLEASE CORRECT"
The offset will also be checked. If the offset is not within 25%
of the full-scale, this error message will appear.
CONFIRMATION LEVEL
Here, you have the opportunity of once again viewing all of
the device's settings (including any changes you may have
made) in a quick overview. If you reject any settings, you will
be automatically redirected to the PARAMETRIZATION
LEVEL. If you accept all settings, these values will be
permanently stored, and you will be automatically redirected
to the DISPLAY LEVEL.
IMPORTANT
You should be completely satisfied with the correctness of the
settings displayed in the CONFIRMATION LEVEL. As soon
as you complete the CONFIRMATION LEVEL, all of these
settings will become effective.
SMART DCM SWITCH – OPERATING INSTRUCTIONS
MU2B-0328GE51 R0207A
5
OUTPUT DESCRIPTION
1
2
4
3
L+
L-
OC PNP
1
2
3
4
P
L+
L-
OC PNP
WARN
WARN
Fig. 6. Pin assignment of A-coded M12 plug
NOTE: The unit and any field devices (actuators, sensors,
etc.) to which it is electrically connected must be
provided with a common ground via pin 3.
The initial conditions of the device's signal outputs are as
follows:
Table 1. DCM Switch signal outputs after power-up
WARN (pin 2) POWER OUTPUT (pin 4)
passive -- open
NOTE: The WARN output (pin 2) is an auxiliary output
used for signaling errors. It cannot be used to drive
high loads.
DCM SWITCH BEHAVIOR IN OVERCURRENT
CONDITIONS
In order to prevent damage of the device electronics, the
device measures the current flowing into the load.
If the current flowing from the switch output to the load
exceeds 250 mA, the load is automatically disconnected and
the WARN output is set to < 0.5 V for 5 sec. The load is then
reconnected, the current is measured again, and the WARN
output is set to the power supply voltage. If the current is still
greater than 250 mA, the load is disconnected and the WARN
output is set to < 0.5 V… in a loop.
Table 2. DCM Switch functions and definitions
definition function
equa-
tion
"active" = "inactive" =
max. monitor N.O.
1 closed open
max. monitor N.C.
1 open closed
min. monitor N.O.
1 open closed
min. monitor N.C.
1 closed open
window monitor N.O.
2 closed open
window monitor N.C.
2 open closed
Equation 1 (min./max. monitor):
active x ≥ USP
y
n+1
= inactive x ≤ LSP
y
n
otherwise
Equation 2 (window monitor):
active LSP ≤ x ≤ USP
inactive x ≤ LSP minus (0.5%
±
range)
Inactive x ≥ LSP plus (0.5%
±
range)
y
n+1
=
yn otherwise
Where
y
n
is the analog output value as determined in the
previous cycle,
y
n+1
is the analog output value as determined in the current
cycle, and
x is the current measured pressure.
USP
USP
USP
LSP
LSP
LSP
NORMALLY-OPEN NORMALLY-CLOSED
time
time
time
p
p
p
closed
closed
closed
open
open
open
time
time
time
p
p
p
closed
closed
closed
open
open
open
USP
USP
USP
LSP
LSP
LSP
MAX. MONITORMIN. MONITORWINDOW MONITOR
Fig. 7. DCM Switch output (max./min./window monitor)
USP
LSP
time
p
closed
open
N.O. MAX. MONITOR (OR N.C. MIN. MONITOR)
T
1
T
3
T
2
T
4
LEGEND:
T less than drop-in time
T greater than or equal to drop-in time
T less than drop-out time
T greater than or equal to drop-out time
1
2
3
4
Fig. 8. Drop-in / drop-out time
SMART SN TRANSMITTER – OPERATING INSTRUCTIONS
MU2B-0328GE51 R0207A
6
SN TRANSMITTER
SEQUENCE OF SCREENS
MODE FUNCTION
OUTPUTSTART-PT END-PT
AUTO-0 SET ZERO RESET 0
PRESSURE,
STATE
START-PT.
WELCOME
END-PT. MODE FUNCTION ATTENUATION
MESSAGE MESSAGE
ATTENUATION
PEAKS
UNIT LANGU AGE BACKLIGHT REFRESH ROTATE CONTRAST
DISPLAY
CLEARMIN. MAX. TEMP. SIMUL. SET CODE RESET
EXTRAS
ENTER
CODE
GO TO
CONFIRM
A
LL
SETTINGS
PLAUSIBLE
?
NO YES
START-PT. END-PT. MODE FUNCTION ATTENUATION CODE SIMUL. STORING...
DISPLAY LEVEL
PARAMETRIZATION LEVEL
CODE
ERROR
START
CONFIRMATION LEVEL
Fig. 9. Sequence of screens – Overview (SN)
Devices equipped with an HMI (Human-Machine-Interface)
feature pushbuttons and a display, allowing easy
configuration by means of a menu structure. The menu
structure is divided into the following segments:
• The START SCREEN;
• The DISPLAY LEVEL (where information including the
current pressure and parameterized values are shown but
cannot be edited);
• The CODE area (where you will have to enter the correct
four-digit CODE in order to proceed any further);
• The PARAMETRIZATION LEVEL (where you can edit
various different parameters);
• A ERROR-CHECKING area (where the device will check
the plausibility of your values and, if necessary, redirect
you back to the PARAMETRIZATION LEVEL); and
• The CONFIRMATION LEVEL (where you can review your
edited values before permanently storing them).
START SCREEN
Within 10 seconds of powering-up the device, an initial screen
– the START SCREEN - will appear briefly (see Fig. 10).
Startup
Fig. 10. Start screen
You will then be automatically directed to the DISPLAY
LEVEL.
DISPLAY LEVEL
In the DISPLAY LEVEL, you can view the current pressure as
well as the various different user-settings currently in force.
Function
A
tt. filter
Non-inv. 10%
MENU
NEXT
PREVIOUS
End
pressure
10.00bar
Mode
2-wire
4..20mA
Start
pressure
0.00bar
MENU
NEXT
PREVIOUS
ESCAPE ESCAPE
MENU
NEXT
PREVIOUS
ESCAPE
NEXT
PREVIOUS
ESCAPE
MENU
NEXT
PREVIOUS
ESCAPE
MENU
0.22
bar
4.35mA
MENU
NEXT
PREVIOUS
Fig. 11. DISPLAY LEVEL (example: SN 2-Wire)
Function
Att. filter
Non-inv. 10%
MENU
NEXT
PREVIOUS
End
pressure
10.00bar
Mode
3-wire
0..10V
Start
pressure
0.00bar
MENU
NEXT
PREVIOUS
ESCAPE ESCAPE
0.22
bar
0.21V
MENU
NEXT
PREVIOUS
MENU
NEXT
PREVIOUS
ESCAPE
NEXT
PREVIOUS
ESCAPE
MENU
NEXT
PREVIOUS
ESCAPE
MENU
Fig. 12. DISPLAY LEVEL (example: SN 3-Wire)
ENTERING THE ENTRY CODE
In order to gain access to the PARAMETRIZATION LEVEL
(where you can edit values), it is first necessary to show that
you have the requisite authorization by entering the correct
four-digit ENTRY CODE (default: 0000).
SMART SN TRANSMITTER – OPERATING INSTRUCTIONS
MU2B-0328GE51 R0207A
7
CODE
NOT
V
ALID
Put code
0000
OK
-
+
0
Put code
0000
-
+
8
Put code
0000
-
+
9
Put code
0009
-
+
0
Put code
0009
-
+
1
Put code
0009
-
+
4
Put code
0009
-
+
5
ESCAPE
OK OK
LEFT LEFT LEFT
OK OK OK OK
Put code
0000
-
+
1
OK
LEFT
LEFT LEFT LEFT LEFT
Fig. 13. Entering the ENTRY CODE
PARAMETRIZATION LEVEL
Once you have successfully entered the ENTRY CODE and
thus gained access to the PARAMETRIZATION LEVEL, you
can edit values and reconfigure the device.
NOTE: The currently set option (e.g. "yes," "no,"
"4…20 mA", etc.) is always marked in the display
screen with a small dot to the left (see Fig. 5).
Function
N.O.
OK
N.C.
ESCAPE
Function
N.O.
N.C.
ESCAPE
OK
DOT
Fig. 14. Dot indicating present setting
START-PT.
In this screen, you can select the start-point. This is defined
as the pressure at which you want the device to begin
providing an analog output signal.
The default setting is "0".
ERROR MESSAGE: "VALUE OUT OF RANGE"
If you have entered a start-point outside of the device's
specified pressure measurement range or which is for any
other reason not rational, this error message will appear,
whereupon you should then enter a correct value.
END-PT.
In this screen, you can select the end point. This is defined as
the pressure at which you want the device to stop providing
an analog output signal.
The default setting is 100% of full-scale.
ERROR MESSAGE: "VALUE OUT OF RANGE"
If you have entered an end-point outside of the device's
specified pressure measurement range or which is for any
other reason not rational, this error message will appear,
whereupon you should then enter a correct value.
OUTPUT
MODE
Here, you can set the device's mode. Four different modes
are possible:
• 0…10V: the voltage range is set to 0…10 V;
• 0…20mA: the current range is set to 0…20 mA;
• 2…10V: the voltage range is set to 2…10 V;
• 4…20mA: the current range is set to 4…20 mA (default).
NOTE: The only mode supported by the SN 2-Wire Trans-
mitter is "4…20 mA". However, it can be inverted
to "20…4 mA" (see section "Function" below).
FUNCTION
Here, you can invert the device's function (see also Fig. 15):
• Non-invert.: the mode (current range or voltage range, as
the case may be) is set to 0/4…20 mA or 0/2…10 V (as
the case may be) (default);
• Inverted: the mode (current range or voltage range, as the
case may be) is set to 20…0/4 mA or 10…0/2 V (as the
case may be).
The default setting is "non-invert."
U/I
MAX MAX
U/I
MAX MAX
U/I
MIN MIN
U/I
MIN MIN
output U/I output U/I
NORMAL OPERATION INVERTED OPERATION
pressure pressure
pressure
start
pressure
start
pressure
end
pressure
end
Fig. 15. SN Transmitter output (normal/inverted)
AUTO ZERO
The purpose of the auto zero function is to allow the user to
adjust the device to local ambient atmospheric pressure and
to compensate for drift. To use this function properly, the
device must be mounted in the application and the pressure
sensor exposed to local ambient atmospheric pressure (i.e.
0 bar relative pressure).
• Yes: The device takes the current local ambient
atmospheric pressure as its zero.
• No: The device setting remains unchanged.
The default setting is "No".
SET ZERO
The difference between the pressure value you enter in this
screen and the pressure which the device is currently
measuring will be taken as the offset. This offset can be reset
to zero using the reset zero option (see section "Reset Zero"
below).
The default setting is the pressure which the device is
currently measuring (meaning that the offset is then zero).
ERROR MESSAGE: "VALUE OUT OF RANGE"
If you have set a zero outside the permissible range (±25%
full-scale), this error message will appear, whereupon you
should then enter a correct value.
RESET ZERO
Here, you can reset the zero:
• Yes: The pressure offset will be set to zero.
• No: The device setting remains unchanged.
The default setting is "No".
ATT. FILTER
Here, you can attenuate (dampen) the outputted portion of
the peak. Possible values range from 0 to 99%. The default
setting is "10" percent.
The formula for calculating the attenuation is as follows:
1
100
)
100
1(
−
+−=
nnn
y
nattenuatio
x
nattenuatio
y
SMART SN TRANSMITTER – OPERATING INSTRUCTIONS
MU2B-0328GE51 R0207A
8
Where
y
n
is the analog output value
x
n
is the measured offset-compensated pressure in this
cycle
y
n-1
is the analog output value generated in the previous
cycle
PEAKS
Here, you can view the historical max. and min. measured
pressures as well as the max. measured temperature
(historical = measured since the device has been put into
operation / since the last time the peaks were cleared).
If desired, by proceeding to "Clear" and choosing "yes," you
can also permanently erase all such values. All such peaks
will then be erased and the recording of peaks will be reinitiated.
DISPLAY
Here, you can select/alter various modes of displaying screen
information.
UNIT
Here, you can choose the units in which the device displays
pressures:
• bar: All pressures will be displayed in bars.
• Pa: All pressures will be displayed in Pascals.
• Psi: All pressures will be displayed in pounds / in2.
The default setting is "bar".
LANGUAGE
English is the only supported language.
BACKLIGHT
Here, you can select how the device's screen backlight
should operate:
• Always: The backlight will remain ON at all times.
• Demand: The backlight will come ON whenever the
device's keys are operated, and remain ON for 25 sec.
• Never: The backlight is shut OFF permanently.
The default setting is "Never"
NOTE: The only backlight option supported by the SN 2-
Wire Transmitter is "Never."
REFRESH
Here, you can set how often (in seconds) the screen contents
should be refreshed (i.e. refilled with freshly-measured data).
Possible values range from 1 to 9 seconds.
The default setting is "1" sec.
ROTATE
Here, you can permanently rotate (by 0°, 90°, 180°, or 270°)
the orientation in which the screen's contents are displayed.
This is for easier viewing / enhanced legibility.
The default setting is "0" degrees (i.e. screen contents vertical
when device mounted in upright position).
CONTRAST
Here, you can choose the degree of contrast with which the
screen's contents are displayed:
• Min.: The contrast is decreased to its minimum value;
• Mean: The contrast is set to its mean value;
• Max.: The contrast is increased to its maximum value.
The default setting is "Mean".
EXTRAS
SIMUL. (= SIMULATION MODE)
The simulation mode allows the user to test the device within
the application without actually applying pressure.
When the simulation mode is initiated, the device's diagnostic
features are not active, and use of the device in an active
safety application is impossible.
After leaving the simulation mode and returning to the normal
operating mode, the device is again ready for use in safety
applications.
• Yes: The simulation mode is started.
• No: The device remains in its normal operating mode.
The default setting is "No".
WARNING
After you have completed testing in the simulation mode, do
not forget to return to this screen and re-instate the active
operating mode.
SET CODE
Here, you can change the ENTRY CODE. After leaving the
PARAMETRIZATION LEVEL and proceeding through the
CONFIRMATION LEVEL, the new ENTRY CODE will then be
in effect.
RESET
Here, you can re-instate all factory (i.e. default) settings:
• Yes: All factory settings are re-instated.
• No: currently-set values are retained.
PLAUSIBILITY CHECK
Upon attempting to leave the PARAMETRIZATION LEVEL,
the device will perform two checks to determine the
plausibility of your values.
ERROR MESSAGE: "MIN. DISTANCE BETW. START-PT. AND
END-PT. IS 50% FS. PLEASE CORRECT PARAMS"
The difference between the set-point and the reset-point will
be checked. If the distance is too small (i.e. less than 50% of
the full-scale), this error message will appear.
ERROR MESSAGE: "OFFSET MUST BE BETWEEN -25%FS &
+25%FS. PLEASE CORRECT"
The offset will also be checked. If the offset is not within 25%
of the full-scale, this error message will appear.
CONFIRMATION LEVEL
Here, you have the opportunity of once again viewing all of
the device's settings (including any changes you may have
made) in a quick overview. If you reject any settings, you will
be automatically redirected to the PARAMETRIZATION
LEVEL. If you accept all settings, these values will be
permanently stored, and you will be automatically redirected
to the DISPLAY LEVEL.
IMPORTANT
You should be completely satisfied with the correctness of the
settings displayed in the CONFIRMATION LEVEL. As soon
as you complete the CONFIRMATION LEVEL, all of these
settings will become effective.
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