Download GW-200 hand-reader - Grain

®
GRAIN-WATCH SYSTEMS
with Hand Instrument
INSTALLATION/USER MANUAL
AB LIROS ELECTRONIC
A719A01 GW200manualENG071115.cdr
TABLE OF CONTENTS
1. Overview
1
1.1 GW200 and sensor lines for silos
1
1.2 GW200 and sensor spears for flat storage
2
2. Electrical installation
3
2.1 GW200 for use with sensorlines GWSL1000/2000.
3
2.2 GW200 for use with sensor spears GWSS2000
4
2.3 ATEX
4
3 Operation and maintenance
5
3.1 Normal use
5
3.2 Batteries
6
3.3 Troubleshooting
6
4. Technical data
AB Liros Electronic,
Box 9124, S-200 39 Malmö, SWEDEN
Tel: +46 40 14 20 80, Fax: +46 40 94 73 88
www.liros.se, [email protected]
6
MODEL
Grain-Watch
Handheld temperature monitor
GW200
ATEX version. The ATEX version is in the
compliance and certified according to the
EC-directive 94/9/EC.
This explosion proof version is certified
where there is a ATEX certified due to the
possible presence of combustible dust in
grain storage facilities.
The GW200 is not in itself ATEX certified
but the system can still be used where
ATEX certified equipment is required by
the use of the GWBA-01 safety barrier.
The GW200 is in the safe area and the
GWBA-01 in between the sensor line and
GW200 hand instrument.
The GW200 can read and present
temperatures from up to 32 sensors at a
time. These sensors can be divided
between several sensor lines or spears.
More than 32 sensors can be read but this
requires more than one acquisition point.
The acquisition point is simply a 3.5mm
standard telephone plug connected to the
sensors which jacks directly into the
GW200. There are no requirements for an
external power supply. All power that is
needed is taken from the batteries inside
the GW200 during the readout.
1. OVERVIEW
The GW200 is a portable handheld
temperature indicator that is part of the
G r a i n -Wa t c h p r o d u c t r a n g e f o r
temperature and humidity measurement
in grain storage facilities.
The GW200 is intended for facilities with
few sensors where the temperature is
manually sampled on regular intervals.
The GW200 is very simple to operate, just
plug it in to the acquisition point from the
sensor-lines or senso- spears, press a key,
wait a few seconds and instantly read the
highest temperature on the large, easy to
read, backlit display.
The GW200 interfaces to the same type of
sensor lines and sensor spears that is
used for the on-line, PC based, GrainWatch system. This means that upgrading
to an automatic system in the future is an
easy step where the existing sensor
components can be used.
The Grain-Watch “Sensor-lines” and
“Sensor-Spears” are available in both a
standard version (NON-ATEX) and an
1.1 GW200 and sensor lines for silos
Junction Box JB-05
GW200
Sensor Lines
hanging down with sensor points evenly
distributed throughout the entire length of
the silo.
When the GW200 is used for silo
storages, it usually interfaces to
GWSL1000/2000 sensorlines which are
suspended in the ceiling of the silo and
AB LIROS ELECTRONIC
1
A719A01 GW200manualENG071115.cdr
for one acquisition point, the sensor-lines
have to be of different types regarding the
programming of the sequence number in
the sensors. This is because the GW200
sees multiple lines as one long,
contiguous sensor line. Sensor-line 1 will
then for example be equipped with
sensors 1-5, sensor-line 2 with sensors 610, sensor-line 3 with sensors 11-15 and
so on. All sensor-lines do not have to be
equipped with the same number of
sensors, though.
The number of sensor-lines that can be
used for one acquisition point is limited
by the following factors:
p The maximum number of sensors is
limited to 32.
p The maximum cable length, including
the length for the lines, is limited to
200m.
p No more than 6 sensor-lines should
be used for one acquisition point.
When more than one sensor-line is used
1.2 GW200 and sensor-spears for flat storage silos
length of the spear is limited to 100m.
p No more than 10 sensor-spears
should be used for one acquisition
point.
Just as for the sensor-lines, the sensorspears have to be of different types
regarding the programming of the
sequence number in its sensors when
more than one spear is to be used for one
single acquisition point. This means that
sensor-spears for different acquisition
points can not be mixed.
This is a generalisation for the use of
sensor-spears in flat storage. Depending
on the layout of the facility and how the
grain is filled and emptied, short sensorlines could also be used in flat storage
instead of sensor-spears.
When the GW200 is used in flat storage, it
is normally used together with sensor
spears of up to 6 meters in length, which
are equipped with 2 – 6 sensors each. Up
to 10 spears are linked together with cable
and connectors to one easily accessible
acquisition point. The spears are inserted
into the grain, evenly distributed
throughout the area, when the flat storage
has been filled and then remains there
until it is emptied.
The number of sensor-spears that can be
used for one acquisition point is limited by
the following factors:
p The maximum number of sensors is
limited to 32.
p The maximum total cable length
between the spears and to the
acquisition point, not including the
AB LIROS ELECTRONIC
2
A719A01 GW200manualENG071115.cdr
2.1 GW200 for use with sensor-lines
GWSL1000/2000.
2. ELECTRICAL INSTALLATION
The GW200 connects to the sensors at the
acquisition point with a 3.5mm standard
jack plug.
0V (-)
If a single GWSL1000/2000 is to be used, a
2 pole cable between the top of the
sensor-line and the jack plug at the
acquisition point is all that is needed.
The signal (+) from the jack plug is
connected to the red wire in the sensorline and 0V (-) from the jack plug is
connected to the black wire in the sensorline.
Signal (+)
The tip in the jack plug connects to the
data signal (+) from the sensors and the
sleeve connects to 0V (-).
Signal (+)
0V (-)
Red
Black
(Red/White)
If more than one GWSL1000/2000 is to be used for one acquisition point, one or two
junction boxes, JB-05, has to be used.
The junction box should be placed on top of the silo, as close to the sensor-lines
connected to it as possible.
Sensor-Line
Sensor-Line
Sensor-Line
JB-05
Junction Box JB-05
Signal (+) Jack Plug
0V (-)
Junction Box JB-05
Jack plug
at acquisition
point
Sensor Lines
AB LIROS ELECTRONIC
3
A719A01 GW200manualENG071115.cdr
2.2 GW200 for use with sensor-spears GWSS-XX
Extension wires
The sensor-spears are manufactured with
one connector for the last or single spear
in a group, or two connectors for all other
spears. The connectors are attached to
short cables which normally need to be
extended with extension wires of a length
that is individually selected to fit the plant.
The connectors are polarized so there
should be no way to connect them wrong.
Just make sure to connect the spears in
the correct order according to the
sequence number for the sensor points in
them. If not, the instrument will still work
and display correct temperatures but it
might be difficult to find out which spear
in a group that has the displayed
temperature.
Connectors
Sens
Jack plug
at acquisition
point
or-sp
ears
2.3 ATEX
GWBA01 has to be used between the
acquisition point and the sensor lines.
When the GW200 is going to be used in an
environment which requires ATEX
approved equipment, the safety barrier
Hazardous area, Zones 20, 21 or 22
Safe area
ATEX Junction Box
ATEX Junction Box
GWBA01
Safety barrier
Jack plug at
acquisition point
GW200
Sensor-lines
Note: The junction boxes used in hazardous area must also
be ATEX approved.
GWBA01
3,5mm jack plug at
acquisition point
+5V
GND
DIN
+5VNET
GND
DNET
0V(-) to sensor-lines or junction boxes
Signal (+) to sensor-lines or junction boxes
See also the installation manual for the GWBA01 for more details.
AB LIROS ELECTRONIC
4
A719A01 GW200manualENG071115.cdr
3 OPERATION AND MAINTENANCE
As mentioned before the GW200 is very easy to operate. A normal measurement is done
with these simple steps.
3.1 Normal use
1 Insert the jack plug at the
acquisition point into the GW200.
2 Press any of the two keys on the front
panel and hold it for about 1 second. The
GW200 is now powered on and starts
with displaying the version number of
the internal software.
3 The display will now show “Scanning”
for a brief period:
4 After a couple of seconds the display
starts to enumerate all temperature
sensors from the one with the lowest
sequence number to the highest.
5 When done with all sensors, the
display moves to the sensor with the
highest temperature and alternates the
sequence number with the text ”Hi”.
At this point the highest temperature
for this group of sensor lines or sensor
spears is known.
6 Temperatures for other sensors can be
displayed by simply pressing the up
and down buttons. The display will
then show next or previous sensor for
this acquisition point.
7 When the buttons are not pressed, the
GW200 will automatically switch of
after a few seconds.
During the enumeration process of all sensors in item 4 above, it is recommended to
check that the instrument really displays all expected sensor numbers for the
measured group. If it doesn't, the instrument hasn't found the sensor that isn't
displayed which could mean that there is something wrong with the sensors. See also
3.3 Troubleshooting, below.
If there are sensors missing in the sequence between the highest and lowest
found sequence numbers, the display
indicates this by showing dashes for that
sensor instead of a temperature when
the sensors are browsed with the up and
down button. Note that this may not be a
fault but instead a deliberately inserted
delimiter between the sequence numbers
of two adjacent sensor lines or sensor
spears in order to easier place a sensor
in its correct sensor line or spear when
AB LIROS ELECTRONIC
browsing them. This shows that the
operator must know how many sensors
there should be to be able to interpret
the result correctly.
5
A719A01 GW200manualENG071115.cdr
3.2 Batteries
The GW200 is powered with two standard
AA sized batteries. These will normally
last for approximately one year if the
instrument is used once a day to measure
the temperatures at a couple of
acquisition points.
If the batteries are almost discharged,
“Low bat” will be indicated on the display
alternated with the normally displayed
data. Also, the background lighting for the
display will be switched off in order to
save power.
3.3 Troubleshooting
Symptom
Cause
Solution
The display is showing
“No Line” even though
the jack plug is inserted.
There is no connection
between the GW200 and
the temperature sensors.
Check the wiring.
The display is
continuously showing
“Scanning”.
The wires to the sensorlines/spears are either
shorted or one or more of
the sensor-lines/spears
have the wires crossed.
Check the wiring.
One or more of the
sensors for an acquisition
point is skipped when the
sensors are enumerated
and showing the text “---“
instead of the
temperature when
browsing with the
up/down buttons.
The GW200 has not been
able to find the sensor.
This could be because a
sensor is broken,
because the same type of
s e n s o r - l i n e / s p e a r,
regarding sensor
sequence numbers, is
used for one acquisition
point.
Check that all sensor
lines/spears are of
different type
regarding sensor
sequence number.
In case you need to contact LIROS regarding troubleshooting or service, make sure to
have the version number of the internal software available - See 3.1 above.
4. TECHNICAL DATA
Item
Data
Type name
Maximum number of sensors
Interfaces to
Size
Weight
Material
Power
Battery life
Operating temperature
GW200 - Handheld temperature indicator
32
GWSS-XX (sensor- spears), GWSL1000/2000 (sensor- lines)
200mm*95mm*40mm
240g (including batteries)
ABS
2 * standard AA batteries
Approximately 1 year
0°C – 40°C
®
GRAIN-WATCH
Silo Temperature
Monitoring
AB Liros Electronic,
Box 9124, S-200 39 Malmö, SWEDEN
Tel: +46 40 14 20 80, Fax: +46 40 94 73 88
www.liros.se, [email protected]