Mettler Toledo FlowPac-M For PM balances Operating instructions

Mettler Toledo
Brand
Mettler Toledo
Model
FlowPac-M For PM balances
Type
Operating instructions
Operating Instructions
METTLER TOLEDO
FlowPac-M
I
D
7
Co
de
4
1
0
Date
8
Time
9
Reset
5
6
Clear
2
3
Print
.
Tol %
-
ENTER
Mo
de
%
Prt
Preset
++
/-
FILL
+5%
-5%
0
MIN
STOP
MAX
M-TARE
Leerseite
1
Contents
Page
2
2
3
3
4
5
9
10
12
13
14
15
15
16
21
22
23
25
26
27
28
1.1 The METTLER TOLEDO FlowPac
1.2 Attaching the keypad and instruments to the scale
1.3 Inserting the program cassette
1.4 Configuration register with FlowPac
2.1 Display
2.2 Keypad
4.1 Selecting the operating mode
5.1 Installation
5.2 Closed-loop control
5.3 Measurement
6.1 General information
6.2 Interface for pumps, valves and alarm devices
6.3 Interface for a printer or computer
9.1 Measurement accuracy
9.2 Control accuracy
9.3 Record
9.4 METTLER TOLEDO accessories
9.5 Selecting the pump
1. Preparation
2. Display and controls
3. Input ranges and default settings
4. Operating modes
5. FlowPac operation
6. Interfaces
7. Error messages
8. What if ...?
9. Appendix
2
1.2 Attaching the keypad and instruments to the scale
The two connection sockets at the rear of the scale are intended for the following instruments:
Socket “DATA I/O”: Instruments with RS232C or CL interface, e.g. GA44 Printer.
Socket “GM”: FlowPac keypad and GM instruments with adapter plug, e.g. GM54 Process
Interface.
The coding pins at the sockets prevent improper insertion of the connection cables.
DATA
I/O
GM
200-240 V: T 63 mA
100-120 V: T 125 mA
1. Preparation
1.1 The METTLER TOLEDO FlowPac
The METTLER TOLEDO FlowPac has been specially developed for use in the lab. It comprises
a keypad and a plug-in program cassette.
When attached to a METTLER TOLEDO scale employing the M-technology, the FlowPac can
control or measure mass flow rates.
• Closed-loop control: - Mass flow control by pumps with frequency or analog signal control.
- Mass flow control with an electromagnetic valve for gases and liquids.
- Continuous computer-controlled mass mixing.
• Measurement: - Measurement and recording of mass flows for the calibration or
certification of pumps, valves or measuring instruments.
- Determination of filter efficiencies.
3
1.3 Inserting the program cassette
Insertion of the program cassette is described in the operating instructions of the scale used.
Note:
Please keep the standard program cassette in a safe place. It will be needed again when the scale
is operated without the FlowPac.
1.4 Configuration register with FlowPac
The FlowPac can be matched to features specific to the application. In the “Unit” sector of the
configuration register (see operating instructions of the scale, “Configuration” section), the
following can be selected notwithstanding the standard software of the scale:
• Language: -E -Yes- English (default setting)
-F -Oui- French
-d -Ja- German
• Date: EU-date Day, month, year (default setting)
US-date Month, day, year
• Record: AU-Prot Automatic printout (default setting)
SEL-Prot Printout only with Print key.
Notes:
• If the configuration register can not be selected, the jumper of the program cassette must be set
to the “unsecured” position (see operating instructions of the scale, “Configuration” section).
• Language and date are not reset when the Reset key is pressed.
4
2. Display and controls
2.1 Display
When used with the FlowPac, the scale operates with three display ranges:
(1)Status display
(2)Value display
(3)METTLER DeltaTrac
Status display
This display indicates the current operational status. The following displays are possible:
_ Minimum fill level reached
Refilling
Siphoning off (maximum fill level reached)
Manual refill key pressed
Normal operation (no status display)
Value display
In this display the following values are shown in the different operating phases:
• Normal operation – display of the actual value of the mass flow rate in g/h.
• Refill phase – display of the net weight.
• Entry mode – display of the keyed-in entry.
METTLER DeltaTrac
The METTLER DeltaTrac shows the deviation of the actual value from the set value. The tolerance
limits are also displayed. The DeltaTrac has a coarse and a fine display.
Interpretation of the indicator position:
- Fine display at 12 o’clock : Actual value = set value
- Fine display on : Lower tolerance limit reached (alarm)
- Fine display on : Upper tolerance limit reached (alarm)
1
23
Fine display
Set value
Coarse display
- Tolerance limit + Tolerance limit
5
2.2 Keypad
The keypad is used to enter all parameters needed for operation. Several data can be stored in
a fail-safe manner with the storage key (key symbol) (see section 3, “Input ranges and default
settings”).
Key functions
Reset key
Clears all entries and resets the FlowPac to the default settings. Default settings, see section 3,
“Input ranges and default settings”.
Clear key
Clears the last keystroke. On repeated pressing, the entire entry can be cancelled.
Print key
Printout of the current weight or the current parameters and a set of measured values.
Enter key
Each numeric entry must be closed with Enter.
Time key
• Entry of the current time.
• Entry of the number 9.
STOP
-5%
+5%
MIN
MAX
M-Tare
0
Reset
Clear
Print
ID Date Time
PrtCode
Fill++/--
Tol %
ENTER
PresetMode
%
0
1
4
78
5
23
6
9
.
-
Reset
Time
9
ENTER
Print
Clear
6
Date key
• Entry of the current date.
• Entry of the number 8.
Identification key
• Entry of a 7-digit identification number.
• Entry of the number 7.
Start manipulated variable key
• Entry of the anticipated initial delivery rate of the pump in percent at start of delivery.
The initial delivery rate can be ascertained automatically by pressing the Preset key.
• Entry of the number 6.
Record timer key
• Entry of the time interval in minutes at which records should be printed out. If 0 is entered, no
record is printed out.
• Entry of the number 5.
Code key
• Entry of a 7-digit code number that should be printed out, but not stored.
• Entry of the number 4.
Tolerance key
• Entry of the admissible tolerance of the set value in percent for the alarm function.
• Entry of the number 3.
Preset key
• Determination of the pump delivery rate.
• Entry of the number 2.
Date
8
ID
7
%
6
Prt
5
Code
4
Tol %
3
Preset
2
7
Mode key
• Entry of the characteristic number for selection of the operating mode (see section 4, “Operating
modes”).
• Entry of the number 1.
Set value key
Entry of the set value in grams or grams per hour (depending on the operating mode selected).
Timer key
• Entry of operating time in minutes in the “Control” operating mode. The entry of 0 results in
continuous operation.
• In the operating mode “Measurement”, the interval is entered in seconds.
Flow direction key
• Entry of the flow direction. After this key has been pressed, the flow direction can be selected
by entry of the following numbers.
0 = delivery to scale
1 = transport from scale.
• Entry of the number 0.
Maximum fill limit key
Entry of the maximum net content at which the refilling operation should be stopped or the
siphoning-off operation started.
Refill limit key
Entry of the minimum net content at which the refilling operation should be started or the siphoning-
off operation stopped.
Refilling operation start/stop key (manual refilling)
Manual start or stop of the refilling operation.
Mode
1
MIN
MAX
++/--
0
Fill
.
8
0
M-Tare
-
STOP
+5%
-5%
Tare key
Taring of the empty container on the scale.
Manual tare key
Numeric entry of a known tare value (when vessels full).
Storage key
Stores the entries in a fail-safe manner. Possible only with certain keys (shown in section 3, “Input
ranges and default settings”, page 9).
Start key
Starts the FlowPac operation.
Stop key
Stops the operation.
Controller keys
Controller on
Manual switching on of the controller (closing of the control loop).
Controller off
Manual switching off of the controller. After execution of this function, operation is continued with
the manipulated variable last used (opening of the control loop).
Manual control of the final control element. Possible only when controller switched off.
Increases the mass flow by 5%.
Decreases the mass flow by 5%.
9
3. Input ranges and default settings
The following values can be entered using the keypad:
Key Storage Input range Unit Default setting
Time 000000 - 235959 – 000000
Date EU: 010189 - 311299 – DD.MM.YY
US: 010189 - 123199 – MM.DD.YY
Identification 0 - 9999999 (including point) – 0
Code 0 - 9999999 (including point) – 0
Record timer X 0 - 255 [min] 0
Start manipu-
lated variable X 0 - 100 [%] 50
Mode X 1111 - 4422 (see section 5) – 1111
Tolerance X 1 - 10 [%] 10
Max. fill limit X Entire weighing range [g] 0
Refill limit X Entire weighing range [g] 0
Manual tare X Entire weighing range [g] 0
Timer X 0 - 65000 [min] [s] 0
Set value X 0 - 1000000 [g/h] [g] 0
Flow direction X 0 or 1 – 0
-
The entries marked with X can be stored in a fail-safe manner.
10
4. Operating modes
ABCD
Refill type
Alarm type
Interface type
Operating mode
Mode
1
1
2
3
4
The FlowPac distinguishes four different operating modes. Three operating modes are used for
the open-loop control and one for the measurement of mass flow rates. After the operating mode
has been selected, information regarding the nature of the pump interface, the alarm type and the
type of refilling must also be entered.
4.1 Selecting the operating mode
To select the operating mode, an operating code is used. It is entered in the form of a 4-digit number
using the keypad. The required operating code should be compiled from the criteria listed in the
following tables and then entered via the keypad.
A
Operating mode
Control 1
Control 2
Control 3
Measurement
Entries
Set value [g/h]
Duration [min]
Set value [g/h]
Duration [min]
End value [g]
Duration [min]
Measurement
interval [s]
Record interval [min]
Display
Delivered mass in [g]
divided by the time
since delivery start
Mean value of mass
flow over the last
30 seconds
Delivered mass in [g]
divided by the time
since delivery start
Mean value of mass
flow over the last
measurement interval
Function
Mass flow delivery
x [g/h] over y [min]
Mass flow delivery
x [g/h] over y [min]
Mass flow delivery
x [g] over y [min]
Mass flow measure-
ment
11
1
2
3
4
Interface type (pumps)
Frequency controlled, max. 7200 [storkes/h]
Frequency controlled, max. 6000 [storkes/h]
Pulse width controlled
Analog signal controlled GA37
1
2
Alarm type
Continue dispensing after alarm
Shut down after alarm
1
2
Refill type
Manual refilling
Automatic refilling
B
C
D
Example:
You wish to deliver 200 g of a liquid over a
20-minute period (under A).
A pump with analog signal control has been
selected as the final control element
(under B).
For safety reasons the delivery should be
discontinued if the alarm is triggered
(under C).
Automatic refilling is not required (under D).
Operating code to be set: 3421
3421
No refilling
Shut down after alarm
Pump with analog signal control
Delivery x [g] over y [min]
DCB
A
12
5. FlowPac operation
5.1 Installation
• Prepare the scale for operation (see sections 1.2 through 1.4).
• Complete mechanical installation and set up instrument data and power connections (see GM54
operating instructions and operating instructions of the components of other manufacturers).
• Switch on scale and initialize with -Reset- (scale menu).
• For an external emergency shutdown, attach the METTLER TOLEDO transfer cable.
Notes:
• The following sections “Closed-loop control” and “Measurement” should be viewed as examples
and not as instructions. The entry of data and the described procedure can be designed to match
your specific needs. If certain data are not entered, the Pac assumes the default settings (see
section 3, “Input ranges and default settings”).
• If the GA44 Printer or a scale employing the SM-technology is used in the FlowPac system, the
Print keys of these instruments have an emergency OFF function.
• Owing to the absence of an RS232C interface, the METTLER TOLEDO GA44 Printer can not
be used with the GA37. In such a case, we advise using a commercially available printer with
an RS232C interface (e.g. Epson FX800).
13
5.2 Closed-loop control
If the FlowPac is used to control mass flows, the system can be set up as follows:
• Place empty container or vessel on the weighing platform.
• Enter the following data using the keypad:
- Time xxxxxx <Enter> Enter time
- Date xxxxxx <Enter> Enter date
- ID xxxxxx <Enter> Enter identification number
- Code xxxxxx <Enter> Enter code number
- Prt x <Enter> Enter record interval [min]
- Valve % 50 <Enter>
- Mode xxxx <Enter> Select operating mode (see section 4.)
- Tol % xx <Enter> Enter tolerance limits
- Max xxx <Enter> Enter upper limit
- Min xxx <Enter> Enter lower fill limit
- →0← Tare
- M-Tare 0 <Enter> Enter manual tare if need be
- Timer xxx <Enter> Enter duration of operation with timer key [min]
• Store entries in a fail-safe manner with the storage key.
• Fill containers/vessels.
• Set up pump/metering devices and adjust.
• Enter desired set value in grams per hour and store in a fail-safe manner.
• Check that delivery tubing is free from bubbles and then press the Preset key.
• Press the Start key.
Notes:
• To obtain good results, the pump delivery rate during operation should be at least 15% of the
max. pump capacity (including allowance for any loss of accuracy).
• In operation with analog-controlled pumps, the GA37 D/A Converter is attached to the RS232C
interface. The converter is connected between the scale and the printer.
• For correct operation, it is essential to enter the data shown in boldface.
Regulated mass flow
Pump
Refilling
Valve
Supply
Record printer
Alarm
RS232C
or CL
GM bus
GM bus
Entry
GM54
14
5.3 Measurement
If the FlowPac is used for the measurement of mass flows, the system can be set up as follows:
• Place empty container or vessel on the weighing platform.
• Enter the following data using the keypad:
- Time xxxxxx <Enter> Enter time
- Date xxxxxx <Enter> Enter date
- ID xxxxxx <Enter> Enter identification number
- Code xxxxxx <Enter> Enter code number
- Prt x <Enter> Enter record interval [min]
- Mode 4xxx <Enter> Select operating mode (see section 4.)
- Tol % xx <Enter> Enter tolerance limits
- Max xxx <Enter> Enter upper limit
- Min xxx <Enter> Enter lower fill limit
- →0← Tare
- M-Tare 0 <Enter> Enter manual tare if need be
- Timer xx <Enter> Enter measurement interval with timer key [min]
• Store entries in a fail-safe manner with the backup key.
• Fill container/vessel and press the Start key.
Note:
For correct operation, it is essential to enter the data shown in boldface.
Inflow
Device under test
Outflow
Set value entry
Record printer
GM bus
RS232C
or CL
15
6. Interfaces
6.1 General information
The system includes an RS232C or CL interface at the scale for the attachment of a printer or a
computer. A GM interface is also available for the attachment of the FlowPac keypad and GM units
from METTLER TOLEDO.
6.2 Interface for pumps, valves and alarm devices
For the attachment of pumps or valves to the FlowPac, the GM54 Process Interface is used.
Pumps with the following types of control can be attached:
• frequency-controlled pumps, the delivery rate depends on the number of pulses;
• electromagnetic valves with control of the opening time, the delivery rate depends on the pulse
duration;
• current- or voltage-controlled pumps, the delivery rate depends on the value of the analog signal
(current or voltage).
If analog controlled pumps are used, the GA37 D/A Converter must also be installed.
In the control of pumps and valves, the limit data shown below must be observed. At relatively high
load, a commercial switching amplifier must be installed between the GM54 and the pump/valve.
Pumps with control of the frequency or opening time
Maximum contact voltage (open contact) 36 V (<1 mA) DC
Maximum contact current (closed contact) 100 mA (<1.8 V) DC
Pumps with control of current/voltage
Control current: 0 - 20 mA or 4 - 20 mA
Control voltage: -10 V to +10 V or 0 ... 10 V
Note:
The GA37 receives the manipulated variables from the RS232C interface of the scale.
1 Refilling
3 Alarm
4 Consumption measurement active
5 Control loop passive
6 Control loop active
GM 54
0 Pump / Valve
Contact number of GM54
METTLER GA37
DATA
I/O
GM
200-240 V: T 63 mA
100-120 V: T 125 mA
GM54
Scale
GA37
16
6.3 Interface for a printer or computer
The scale with FlowPac has a bidirectional RS232C/CL (20 mA) data interface that can be used
to control the FlowPac. All entries that are possible via the keypad can also be performed via the
interface. In such a case, the FlowPac keypad can be removed. Commands can be issued to the
FlowPac and operating parameters transferred or read. Correct functioning requires adherence
to the command formats described in the following sections:
Notes:
• For successful communication between computer and scale, the following transmission
parameters of the interfaces must match:
- Transmission rate (baud rate)
- Parity
- Handshake (type and cable wiring)
• The data formats, data types and ranges of values can be found in section 3, “Input ranges and
default settings”.
Read
commands
Write
commands
17
6.3.1 Writing to the FlowPac
When commands are issued to the FlowPac or operating parameters have to be set, the following command formats must be observed:
Definition: An ASCII character Space Several ASCII characters
X
_
Issuing commands
A
R
F
W
C
L
1
A
R
F
W
C
L
0
A
R
F
W
C
L
2
A
R
F
W
C
L
3
A
R
F
W
C
L
81
A
R
F
W
C
L
4
A
R
F
W
C
L
02
A
R
F
W
C
L
12
A
R
F
W
C
L
22
A
R
F
W
C
L
32
A
R
F
W
C
L
42
Start
Stop
Switch off control (open control loop)
Switch on control (close control loop)
Fill (GM54 refill contact closes)
Set zero load (102)
Store in fail-safe manner
Increase manipulated variable by 5%
Decrease manipulated variable by 5%
Print (read measured value set)
Execute Preset function (learning)
Operating parameter
18
Setting operating parameters
Set identification number
Set date
Set time
Set code number
Set tolerance band (alarm)
Set set value
Set operating time. In the operating mode “Control”, the entry is in minutes, in the operating
mode “Measurement” in seconds.
Set record timer
Set initial set value of the pump
Set 4-digit operating code
Select flow direction (0 = deliver to scale, 1 = transport from scale)
Set upper refill limit
Set lower refill limit
Set numeric value of tare (M-tare)
A
R
F
W
C
L
_
6
Date
A
R
F
W
C
L
_
1
Interval
2
A
R
F
W
C
L
_
1
Flow direction
5
A
R
F
W
C
L
_
1
Max. refill limit
6
_
g
A
R
F
W
C
L
_
1
Operating code
4
A
R
F
W
C
L
_
9
Tolerance
_
%
A
R
F
W
C
L
_
7
Time
A
R
F
W
C
L
_
5
Identification No.
A
R
F
W
C
L
_
1
Set value
0
_
g
A
R
F
W
C
L
_
1
Numeric tare
9
A
R
F
W
C
L
_
1
Min. refill limit
7
_
g
A
R
F
W
C
L
_
1
Start value
3
_
%
A
R
F
W
C
L
_
1
Duration
1
A
R
F
W
C
L
_
8
Code No.
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Mettler Toledo FlowPac-M For PM balances Operating instructions

Mettler Toledo
Brand
Mettler Toledo
Model
FlowPac-M For PM balances
Type
Operating instructions
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