Kracht SD 1 User manual

Electronic
SD1, AS 8, FM 16, ASR 16, ASR 20

KRACHT GmbH · Gewerbestr. 20 · D-58791 Werdohl · Tel. [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected]2

KRACHT GmbH · Postbox 1420/1440 · D-58774 Werdohl · Phone [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected]
List of contents
Contents Page
List of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SD 1 . . . . . . . . . . . . . . . . . . . . 4
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SD 1 . . . . . . . . . . . . . . . . . . . . 5
Type code, dimensions and electrical connection . . . . SD 1 . . . . . . . . . . . . . . . . . . . . 6
Function and product characteristics . . . . . . . . . . . . . AS 8 . . . . . . . . . . . . . . . . . . . . 7
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AS 8 . . . . . . . . . . . . . . . . . . . 8
Type code and dimensions . . . . . . . . . . . . . . . . . . . AS 8 . . . . . . . . . . . . . . . . . . . . 9
Flow rate / Volumetric measurement . . . . . . . . . . . . AS 8 . . . . . . . . . . . . . . . . . . . 10
Flow rate controller . . . . . . . . . . . . . . . . . . . . . . . . AS 8 . . . . . . . . . . . . . . . . . . . 11
Dosing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AS 8 . . . . . . . . . . . . . . . . . . . 12
Cylinder strobe measurement . . . . . . . . . . . . . . . . . AS 8 . . . . . . . . . . . . . . . . . . . 13
Flow rate and sum measurement . . . . . . . . . . . . . . . AS 8 . . . . . . . . . . . . . . . . . . . 14
Flow rate and difference measurement . . . . . . . . . . AS 8 . . . . . . . . . . . . . . . . . . . 15
Ratio measurement . . . . . . . . . . . . . . . . . . . . . . . . AS 8 . . . . . . . . . . . . . . . . . . . 16
Flow rate and ratio measurement . . . . . . . . . . . . . . AS 8 . . . . . . . . . . . . . . . . . . . 17
Ratio controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . AS 8 . . . . . . . . . . . . . . . . . . . 18
AS8-PUR-TESTER . . . . . . . . . . . . . . . . . . . . . . . . . . AS 8 . . . . . . . . . . . . . . . . . . . 19
VC simulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AS 8 . . . . . . . . . . . . . . . . . . . 20
Function and product characteristics . . . . . . . . . . . . FM 16 . . . . . . . . . . . . . . . . . . . 21
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 16 . . . . . . . . . . . . . . . . . . . 22
Type code and dimensions . . . . . . . . . . . . . . . . . . FM 16 . . . . . . . . . . . . . . . . . . . 23
Function and product characteristics . . . . . . . . . . . ASR 16 . . . . . . . . . . . . . . . . . . . 24
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . ASR 16 . . . . . . . . . . . . . . . . . . . 25
Type code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ASR 16 . . . . . . . . . . . . . . . . . . . 26
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . ASR 16 . . . . . . . . . . . . . . . . . . . 27
Function and product characteristics . . . . . . . . . . . ASR 20 . . . . . . . . . . . . . . . . . . . 28
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . ASR 20 . . . . . . . . . . . . . . . . . . . 29
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . ASR 20 . . . . . . . . . . . . . . . . . . . 30
3

Plug-in display unit SD 1
• The plug-in display unit
SD1 may be used with
any KRACHT flow meter
which uses a plug-in
connection according to
DIN 43650.
• The display unit is simply
inserted between the plug
and the plug socket on
the volume counter.
The displayed value will
be the actual flow rate
or the volume.
The square wave signal
remains available for
external processing.
Function
• Volume counters already
supplied can be equipped
with the plug-in display
unit. To achieve this the
amplifier card must be
removed from the plug
socket.
• The plug-in display unit is
freely programmable. All
necessary settings can be
achieved with two keys.
The programmed data is
stored on an FRAM and
therefore saved in case of
power failure.
• The SD1 Service is an
plug-in display unit which
may be used with any
KRACHT flowmeter with
plug-in connection
according to DIN 43650.
• The display unit is simply
put on the plug socket of
the flow meter.
• The accupack supplies the
SD1 and the sensors with
power.
• No seperate power supply
is necessary.
• If the accus are empty
the SD1 Service can be
operated and charged with
the enclosed charger.
• The impuls volume is
freely programmable.
• All necessary settings
can be achieved with
two keys.
• The programmed data are
stored on a FRAM and
therefore saved in case of
empty accus.
• With the accu pack an
operating time of 30
hours is possible without
recharging.
KRACHT GmbH · Postbox 1420/1440 · D-58774 Werdohl · Phone [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected] 4
Function+Product characteristics SD1-Service

5
KRACHT GmbH · Postbox 1420/1440 · D-58774 Werdohl · Phone [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected]
Technical data SD 1+SD1-Service
Processor PIC 17 C 42
Power unit
Supply 18 VDC – 28 VDC
optional 10 – 19 VDC
Current input approx. 120 mA
General data
Display principle: 7 segment LED,
7.62 mm, red
display: 0.000... 9999
with floating
decimal point
overflow (>9999):
display 9999
Keyboard two keys behind the front panel
Housing material aluminium
Dimensions height(without plug)
approx. 35 mm,
width approx. 60 mm,
depth approx. 60 mm
Protection (DIN 40050) IP 65
Weight approx. 0.12 kg
Connections angled connector DIN 43650
(4-pins) polarized
Analog output current output
(optional) 0 – 20 mA, 4 – 20 mA
load <= 250 Ohm,
at 18–28 VDC supply
load <= 50 Ohm,
at 10 VDC supply
10 bit resolution,
short-circuit-proof
Pulse output Incremental signal
Pulse amplitude approx. 0.8 x supply voltage
Pulse shape with
symmetrical output signal sqare wave, pulse duty
factor/channel 1:1, +/--15%
Pulse offset between
two channels 90°, +/-- 30°
Output power/channel Pamax = max. 0.3 W
short-circuit-proof
Enveronmental conditions
Operating temperature -- 0 °C up to +60 °C
Storage temperature --25 °C up to +85 °C
SD1
Processor PIC 17 C 42
Current supply
Accumulator 6 VDC
Working time approx. 30 hours
Battery charger controlled by micro-controller
Input voltage 230 VAC
Charging current max. 700 mA
Charging time approx. 4 hours
General characteristics
Display prinziple: 7 segment LED,
7.62 mm, red
display: 0.000 ... 9999
with floating point
overflow (>9999):
display 9999
Keyboard two keys on the front side
Housing material aluminium
Protection (DIN 40050) IP 65
Weight approx. 0.46 kg
Connections angled connector DIN 43650
(4-pins) polarized
Environmental conditions
Operating temperature -- 0°C up to +60°C
Storage temperature --10°C up to +85°C
SD1-Service

Type code, dimensions and electrical connections SD 1
Type code
KRACHT GmbH · Postbox 1420/1440 · D-58774 Werdohl · Phone [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected] 6
Product name
SD1 –R – 24
output signal
Rsquare wave signal
(incremental signal)
Icurrent output
0 – 20 mA, 4 – 20 mA
Ktwo relais contacts
24 VDC/1A
operating voltage
24 24 VDC
12 12 VDC
without specification =
Flow rate measurement
V Volume measurement
Dimensions
Electrical connection
1
2
3
SD 1
35
60
PIN 1 = 12/24 VDC
PIN 2 = GND
PIN 3 = Relais 1
PIN = Relais 2
/V
Version: K
1
2
3
PIN 1 = 12/24 VDC
PIN 2 = GND
PIN 3 = 0/4-20 mA
PIN = —
Version: I
1
2
3
PIN 1 = 12/24 VDC
PIN 2 = GND
PIN 3 = Channel 1
PIN = Channel 2
Version: R
At version V = Volume measurement on Pin lays „Enable Summation“

Function and product characteristics AS 8
Examples of application
flow rate measurement . . . . . . . .hydraulic test stand
volume measurement . . . . . . . . .consumption record
volume measurement . . . . . . . . .indirect cylinder
. . . . . . . . . . . . . . . . . . . . . . . . .path measurement
ratio measurement . . . . . . . . . . .two-component devices
dosing . . . . . . . . . . . . . . . . . . . .filling units
test apparatus . . . . . . . . . . . . . .volume counter
• EMC construction
• programmable micro-
processor
• used for KRACHT Volume
Counters and other sen-
sors with 24 volt incre-
mental signals
• power supply voltage
230 /120 V 50/60 Hz
24 VDC / 12 VDC
• integrated sensor power
supply 24 VDC 50mA
• flow rate or
volume measurement
• smoothing function by
means of a digital filter
• 2 programmable relays
• user-selected analog
output
current: ± 20 mA,
0...20 mA,
4...20 mA
voltage: ± 10 V,
0...10 V,
• serial interface RS 232
• selectable time basis
(sec, min, hrs)
• selectable units for dis-
play
• enclosure with dimen-
sions according to DIN
• The microcontroller AS 8
processes incremental
input signals from
KRACHT Volume Counters
and other sensors.
• The input signals are filte-
red in the unit, interpreted
and converted into the
values of flow rate and
volume.
Function Product characteristics
• The user may choose to
have either flow rate or
volume displayed.
• Two relays, one analog
output or one serial inter-
face are available for
further, external proces-
sing.
7
KRACHT GmbH · Postbox 1420/1440 · D-58774 Werdohl · Phone [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected]

8
Technical data AS 8
Processor PIC 17C42
Supply 230 VAC, + 6% ... – 10% / 50 – 60 Hz, optional 120 VAC, 24 VDC, 12 VDC
Power input (power consumption) ca. 3.5 W
Sensor supply 24 VDC +/-- 20%, 50 mA
General data
Display principle: 7 segment LED, 13.2 mm, red
display: 0.000 ... 9999 with floating decimal point
overflow ( >9999 ): display 9999
overflow (<-9999 ): display -9999
status indicator: LEDs K1 and K2 for relays 1 and 2
Keyboard three keys behind the front panel, optional keys on front panel
Housing for switch panel plug-in unit made of plastic
Panel frame 96 x 48 mm, DIN 43700
Insertion depth ca. 122 mm with plug board
Panel cutout 92 x 45 mm, tolerance +0.8 x +0.6 mm
Protection (DIN 40050) IP 54 in appropriate switch panel mounting
Ground (weight) approx. 0.4 kg
Connections 15 pins terminal connecting block
2 relay contacts one normally-open-contact switching-time each
2 digital inputs
Input impendance >= 7500 Ohm
Input amplitude low <= 9 volt, high >= 12 volt
Switching time typ. 1 ms
1 analogue output current or voltage output adjustable by means of jumper
Voltage output ± 10 volt, 0 – 10 volt, 2 – 10 volt / load >= 1 kOhm,
or 10 bit resolution, short-circuit-proof
Current output ± 20 mA, 0 – 20 mA, 4 – 20 mA / load <= 250 Ohm,
10 bit resolution, short-circuit-proof
1 volume counter input
Input impendance >= 7500 Ohm
Input amplitude low <= 9 volt, high >= 12 volt
Rate-of-flow principle of measurement period length measurement (rising tooth flank)
Maximum input frequency 1Hz ... 2500 Hz
Measurement range totalizer 2 x 109pulses
Serial interface
RS 232 cable length <= 15 m
Input voltage max. ± 30 V
Input current typ. ± 3 mA at ± 9 V input voltage
Output current typ. ± 3 mA
Adjustment (selection) 9600 baud, 8 bit, no parity, 1 stop bit
Cable shield data cables recommended
Environmental conditions
Operating temperature 0 °C up to +60°C
Storage temperature --25 °C up to +85 °C
KRACHT GmbH · Postbox 1420/1440 · D-58774 Werdohl · Phone [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected]

Type code and dimensions AS 8
KRACHT GmbH · Postbox 1420/1440 · D-58774 Werdohl · Phone [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected]
Type code
9
Dimensions
109
122
89.5
8
42.5
96
48
92
K 1 K 2
45
Panel cutout
Terminals
Optional: Desktop unit
19" plug-in unit
Product name
EXAMPLE
UVoltage ± 10 V
ICurrent ± 20 mA
RS Serial
interface RS 232
O without analog output
(RS 232 available)
just for 12 and 24 volt
230 230 V – 50/60 Hz
120 120 V – 50/60 Hz
24 24 VDC
12 12 VDC
Analogue output Power supply voltage
AS 8– U – 230– ... / F
Keyboard
without specification =
Switches behind front cover
Fwith keys on front panel
Versions
without specification
Standard = Flow rate or volume-
tric measurement
RP Flow rate controller
DOS Dosing program
ZM Cylinder stroke
measurement
A2F Flow rate and
sum measurement
D2F Flow rate and
difference measurement
VA Ratio measurement
V2F Flow rate and ratio
measurement
PUR Ratio controller
FM20 Flow rate indication
switchable for all
KRACHT volume counter
SIM Simulator for
volumetric meter

Flow rate / Volumetric measurement AS 8-standard
• The standard version AS 8
is an indication and control
device for dynamic flow
rate and volume measure-
ment. The setting is made
by means of three keys,
which are accessible on
removal of the front cover.
Optional via keys on front
panel (version /F).
• The switch-over between
the display units is made
by means of DIP switches,
located behind the front
cover.
Functional characteristics
K 1 K 2
Volume Counter
Reset
(Zero position) Volume indication
e.g.: 20 l
Two relay contacts
Incremental encoder signals
Analogue output
± 10 Volt, 0–10 Volt
± 20 mA, 0–20 mA,
4–20 mA oder RS 232
Volume indication
• The incremental input signals are summed and converted
to the dimensions of volume by the microcontroller, using
a programmable factor.
• The physical units l and US gal can be set for display.
• A 24 volt digital input enables the summation to be reset
to zero.
• Two programmable relays,
an analogue output, or an
RS 232 serial interface,
are available for further
external processing.
• The integrated 24 VDC
transducer supply enables
Incremental encoder signals
K 1 K 2
Volume counter
Two relay contacts
Flow rate indication
e.g.: 20 l/min
Analogue output
± 10 Volt, 0–10 Volt
± 20 mA, 0–20 mA,
4–20 mA oder RS 232
the Volume Counter to be
directly connected.
• The type AS 8 series
measuring devices are
available as built-in
control panel units,
as bench units or as 19"
rack-mounted units.
Flow rate measurement
Flow rate indication
• The incremental input signals are filtered, converted and
processed by the microcontroller to yield the dimensions
of flow rate.
• Any of the following physical units can be set for the indi-
cator reading: l/h, l/min, l/s, or US gal/hr, US gal/min,
US gal/s.
Volumetric measurement
KRACHT GmbH · Postbox 1420/1440 · D-58774 Werdohl · Phone [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected] 10

Flow rate controller AS 8-RP
Flow rate controller
• Two relay contacts enable
the overshoot of permissi-
ble error bandwidths to be
signalled.
Functional characteristics
• Programming and setting
is carried out by means of
three keys which are
accessible on removal of
the front cover. Optional
via keys on front panel
(version /F).
K 1 K 2
Volume counter Flow rate indication
e.g.: 2000 l/min
Controller
on/off Relay
Analogue output
0–10 Volt
or 0–20 mA
K 1 K 2
FU
Rotary transducer
Rotational speed A
e.g.: 1000 min-1 Rotational speed Relay
Frequency
converter
Rotational speed controller
• A further application
example is that of rotatio-
nal speed regulation.
• The required speed is set
on the AS 8. The actual
rotational speed is
detected by the rotary
transducer and fed to the
AS 8 as a square-wave
signal.
• The controller output is
connected to the motor
via a frequency converter
and used to control the
rotational speed.
Flow rate controller
• The AS8-RP Flow rate
controller version
controls the flow rate
of a component.
• The required flow rate is
set on the AS 8.
The flow rate is detected
by the Volume Counter
and fed to the AS 8 as a
square-wave signal.
• The controller output is
connected to a contin-
uously variable valve via a
position amplifier, or is
used to control the speed
of a delivery pump.
Rotational speed controller
• The integrated 24 VDC
transducer supply enables
the direct connection of
the Volume Counter.
• The type AS 8 series
measuring devices are
available as built-in
control panel units,
as bench units, or as 19"
rack-mounted units.
KRACHT GmbH · Gewerbestr. 20 · D-58791 Werdohl · Tel. [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected] 11
Controller on/off

Dosing AS 8-DOS
• The AS8 dosing version
is especially designed for
employment in dosing
lines. It allows of one
Volume Counter to be
connected.
• 6 dosages (programmes)
can be stored in the AS8.
Specific dosages are
called up via the three
keys on the front panel.
The input values are
arranged in menus.
• The filling process is star-
ted by the digital input.
The AS8 resets the last
dosage quantity and
switches the dosage valve.
The Volume Counter
measures the flow and
delivers square wave
signals to the AS8.
The AS8 sums the input
signals. When the quantity
is reached the dosage
valve will be switched.
• The second relais contact
enables the indication of
faulty dosages.
Functional characteristics
• The settings are made by
using the three keys on the
front panel. The input
values are arranged in
menus.
• The integrated 24 VDC
sensor supply enables
direct connection to the
Volume Counter.
• The type AS8 measuring
devices are available as
built-in control panel units,
as desk-top units, or as
19" rack-mounted units.
KRACHT GmbH · Gewerbestr. 20 · D-58791 Werdohl · Tel. [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected]12
F1 F2 F3
Volume counter
Dosage valve
Volume indication
e.g.: 2 L
Failure
Start
Stop
K 1
K 2

Cylinder stroke measurement AS 8-ZM
K 1 K 2
• The cylinder stroke mea-
surement version of the
AS 8 enables an indirect
measurement to be made
of hydraulic drive move-
ments, in combination
with a Volume Counter.
• In this system, the Volume
Counter is installed in an
operating line, to generate
pulses which are propor-
tional to the flow rate and
to indicate the direction of
flow.
Functional characteristics
• The electrical pulses are
converted by the micro-
controller into the physi-
cal dimensions of flow
rate and volume, or stroke
and velocity.
• Erroneous measurements,
due to leakage at the
end positions, can be
prevented by means of a
programmable blocking
frequency. The signals
are only processed when
the flow rate exceeds the
blocking frequency.
• Two relays, an analogue
output or an RS 232 inter-
face, are available for
additional external proces-
sing.
• Programming and setting
is carried out by means of
three keys, which are
accessible on removal of
the front cover.
• The integrated 24 VDC
transducer supply enables
the direct connection of
the Volume Counter.
Volume counter
Cylinder position
e.g.: 200 mm Two relay contacts
Reset (Zero position)
Analogue output
± 10 volt, 0–10 volt
± 20 mA, 0–20 mA,
4–20 mA or RS 232
• The type AS 8 series
measuring devices are
available as built-in
control panel units,
as bench units, or as 19"
rack-mounted units.
KRACHT GmbH · Gewerbestr. 20 · D-58791 Werdohl · Tel. [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected] 13

KRACHT GmbH · Postbox 1420/1440 · D-58774 Werdohl · Phone [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected] 14
F1 F2 F3
Sum indication
A+B = 15.00 l/m
Flow rate component A = 10 l/m
Flow rate component B = 5 l/m
Component A
e.g.: 10 l/m
Component B
e.g.: 5 l/m
Analogue output
0 – 10 Volt,
0/4–20 mA,
Key ■■
F3
Key ■■
F1
Key ■■
F2
Relay
• Two Volume Counters
could be connected to the
AS 8-A2F. The AS 8
shows the flow rate of
component A and B and
the sum A+B.
• The different indications
are switched by the keys
■■
F1 , ■■ F2 and ■■ F3 .
Functional characteristics
• For each Volume Counter
a density factor can be
put in.
• One square-wave signal is
required of each Volume
Counter. The input signals
are filtered, converted and
processed by the micro-
controller to yield a sum.
• The settings are made
using the three keys of
the Front panel. The input
values are arranged in
menus.
• Two relay contacts, an
analogue output or an RS
232 interface are available
for additional external
processing.
• The integrated 24 VDC
transducer supply ena-
bles the direct connection
of the Volume Counter.
• The type AS 8 series
measuring devices are
available as built-in
control panel units,
as bench units, or as 19"
rackmounted units.
Flow rate and sum measurement AS 8 - A2F
F1 F2 F3
F1 F2 F3

F1 F2 F3
Difference indication
A–B = 5.00 l/m
Flow rate component A = 10 l/m
Flow rate component B = 5 l/m
Component A
e.g.: 10 l/m
Component B
e.g.: 5 l/m
Analogue output
0 – 10 Volt,
0/4–20 mA,
Key ■■
F3
Key ■■
F1
Key ■■
F2
Relay
• Two Volume Counters
could be connected to the
AS 8-D2F. The AS 8
shows the flow rate of
component A and B and
the difference A–B.
• The different indications
are switched by the keys
■■
F1, ■■ F2 and ■■ F3 .
Functional characteristics
• For each Volume Counter
a density factor can be
put in.
• One square-ware signal is
required of each Volume
Counter. The input signals
are filtered, converted
and processed by the
microcontroller to yield a
difference.
• The settings are made
using the three keys of
the front panel. The input
values are arranged in
menus.
• Two relay contacts, an
analogue output or an
RS 232 interface are
available for additional
external processing.
• The integrated 24 VDC
transducer supply ena-
bles the direct connection
of the Volume Counter.
• The type AS 8 series
measuring devices are
available as built-in
control panel units,
as bench units, or as 19"
rackmounted units.
Flow rate and difference measurement AS 8 - D2F
F1 F2 F3
F1 F2 F3
KRACHT GmbH · Gewerbestr. 20 · D-58791 Werdohl · Tel. [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected] 15

KRACHT GmbH · Postbox 1420/1440 · D-58774 Werdohl · Phone [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected] 16
Ratio measurement AS 8-VA
• Two programmable relays,
an analogue output, or an
RS 232 serial interface,
are available for further
external processing.
Functional characteristics
K1 K 2
Component A
e.g.: 10 l/m
Component B
e.g.: 5 l/m
Mixture ratio indication
e.g.: A / B = 2
Relay
K 1 K 2
Rotational speed A
e.g.: 1000 min-1
Rotational speed B
e.g.: 500 min-1
Rotational speed ratio
A / B = 2
Relay
• The programming and
settings are achieved via
three keys, accessible on
removal of the front cover.
Optional via keys on front
panel (version /F).
Rotational speed
ratio indicator
• Another application example is that of rotational speed
ratio measurement.
The pulse trains A and B from the rotary transducers are
detected and indicated on the AS 8 as a rotational speed
ratio.
Mixture ratio indicator
• The AS 8 mixture indicator displays the mixing ratio of
two components.
• A square-wave signal is required from each volumetric
meter. The input signals are filtered, converted and
processed by the micro-controller to yield a mixture ratio.
Mixture ratio measurement
Rotational speed ratio measurement
• The integrated 24 VDC
transducer supply enables
the direct connection of
the Volume Counter.
• The type AS 8 series
measuring devices are
available as built-in
control panel units,
as bench units, or as 19"
rack-mounted units.
Analogue output
0–10 volt, 0/4–20 mA
or RS 232
Analogue output
0–10 volt, 0/4–20 mA
or RS 232

17
KRACHT GmbH · Postbox 1420/1440 · D-58774 Werdohl · Phone [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected]
F1 F2 F3
Mixture ratio indication
A/B = 2.000
Flow rate component A = 10 l/m
Flow rate component B = 5 l/m
Component A
e.g.: 10 l/m
Component B
e.g.: 5 l/m
Analogue output
0 – 10 Volt,
0/4–20 mA,
key ■■
F3
key ■■
F1
key ■■
F2
Relay
• Two Volume Counters
could be connected to the
AS 8-V2F. The AS 8
shows the flow rate of
component A and B and
the mixture ratio A/B.
• The different indications
are switched by the keys
■■
F1 , ■■ F2 and ■■ F3 .
Functional characteristics
• For each Volume Counter
a density factor can be
put in.
• One square-ware signal is
required of each Volume
Counter. The input signals
are filtered, converted and
processed by the micro-
controller to yield a mix-
ture ratio.
• The settings are made
using the three keys of
the front panel. The input
values are arranged in
menus.
• Two relay contacts,
an analogue output or an
RS 232 interface are
available for additional
external processing.
• The integrated 24 VDC
transducer supply enables
the direct connection of
the Volume Counter.
• The type AS 8 series
measuring devices are
available as built-in
control panel units,
as bench units, or as 19"
rackmounted units.
Flow rate and Ratio measurement AS 8 - V2F
F1 F2 F3
F1 F2 F3

KRACHT GmbH · Postbox 1420/1440 · D-58774 Werdohl · Phone [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected] 18
Ratio controller AS 8-PUR
• The ratio controller versi-
on of the AS 8 controls
the mixing ratio of two
components.
• The mixing ratio of the
reference component A to
component B is set on the
AS 8.
• The volumetric flows are
detected by the Volume
Counter and fed to the
AS8 as square-wave
signals. The input signals
are filtered, converted and
processed by the micro-
controller, to yield a
mixing ratio. The control-
ler output is either directly
connected, or connected
via a position amplifier,
to a continuously con-
trollable valve, or used to
control the speed of a
delivery pump.
• Two relay contacts enable
the overshoot of permissi-
ble error bandwidths to be
signalled.
• All settings are made
using three keys, which
are accessible on removal
of the front cover.
Optional via keys on front
panel (version /F).
The input values are
arranged in menus.
• The integrated 24 VDC
transducer supply enables
the direct connection of
the Volume Counter.
Functional characteristics
F1 F2 F3
Component B
e.g.: 5 l/m
Mixture ratio indication
e.g.: A / B = 2 Relay
Analogue output
0–10 Volt
oder 0–20 mA
Component A
e.g.: 10 l/m Controller
on/off
key ■■
F2
Flow rate component A = 10 l/m
key ■■ F1
Flow rate component B = 5 l/m
key ■■
F3
F1 F2 F3
F1 F2 F3

19
KRACHT GmbH · Postbox 1420/1440 · D-58774 Werdohl · Phone [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected]
AS 8 PUR-TESTER
• The volume counters
could be connected to the
AS 8 PUR-TESTER.
Depending on the volume
counters type of connec-
tion either the cables
with Cannon-connector or
with Hirschmann-connec-
tor have to be used.
• The AS 8 PUR-TESTER
shows the flow rate of
component A and B and
the mixture ratio A/B.
• The different indications
are switched by the keys
■■
F1, ■■ F2 and ■■ F3.
For each volume counter
a density factor can be
put in.
Functional characteristics
• One square-wave signal is
required of each volume
counter.
This input signals are
filtered, converted and
processed by the micro-
controller to yield a mixtu-
re ratio.
Front view
Rear view with analogue output All dimensions in mm
• The setting are made
using the three keys on
the front panel. The input
values are arranged in
menus.
• An analogue output is
available for aditional
external processing.
The integrated 24 VDC
transducer supplies ena-
bles the direct connection
of the volume counter.
The delivery contains:
• AS8 with keys on front panel, software version V2F
assembled in a desk-top unit.
• 2 cables for Cannon-connector.
• 2 cables for Hirschmann-connector.
approx. 165

KRACHT GmbH · Postbox 1420/1440 · D-58774 Werdohl · Phone [phone] · Fax [phone] · Internet: www.kracht-hydraulik.de · e-mail: [email protected] 20
Flow rate display unit AS 8-FM20
• One Volume counter
can be connected to the
AS 8-FM20.
• By pressing the „Select“ –
button each Volume
Counter size of KRACHT
GmbH can be selected.
The internal configuration
like geometrical tooth
volume and the setting of
the analogue output are
made automatically.
Functional characteristics
• The indication is made
in l/min. The selection of
current or voltage analo-
gue output can be made
by changing the jumper
position inside the AS 8.
Front view
Rear view with analogue output
All dimensions in mm
• The AS 8-FM20 will be
delivered in a desk-top
unit.
K2 K1
AS8
SELECT
ENABLE
SELECT
OPERATE
205
173
Si
VC-EINGANG ANALOGAUSGANG
PIN 5 SCHIRM
PIN 4 GND(INTERN)
PIN 3 KANAL 2
PIN 2 KANAL 1
PIN 1 +24V(INTERN)
PIN 4 GND(INTERN)
PIN 1 +/-10V
100 mA/250 V
AS8- -
GMBH
ca. 165
5.6
87.5
151
approx. 165