Mettler Toledo FlowPac-M For PM balances Operating instructions

Brand: Mettler Toledo

Model: FlowPac-M For PM balances

Type: Operating instructions

Operating Instructions

METTLER TOLEDO

FlowPac-M

Date

Time

Reset

Clear

Tol %

ENTER

Prt

Preset

FILL

+5%

-5%

MIN

STOP

MAX

M-TARE

Leerseite

Contents

Page

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

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

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.

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.

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)

Fine display

Set value

Coarse display

- Tolerance limit + Tolerance limit

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

Reset

Clear

ID Date Time

PrtCode

Fill++/--

Tol %

ENTER

PresetMode

Reset

Time

ENTER

Clear

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

Prt

Code

Tol %

Preset

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

MIN

MAX

++/--

Fill

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%.

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.

4. Operating modes

ABCD

Refill type

Alarm type

Interface type

Operating mode

Mode

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.

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

Interface type (pumps)

Frequency controlled, max. 7200 [storkes/h]

Frequency controlled, max. 6000 [storkes/h]

Pulse width controlled

Analog signal controlled GA37

Alarm type

Continue dispensing after alarm

Shut down after alarm

Refill type

Manual refilling

Automatic refilling

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

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).

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

Entry

GM54

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

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

200-240 V: T 63 mA

100-120 V: T 125 mA

GM54

Scale

GA37

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

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

Issuing commands

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

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)

Date

Interval

Flow direction

Max. refill limit

Operating code

Tolerance

Time

Identification No.

Set value

Numeric tare

Min. refill limit

Start value

Duration

Code No.

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Mettler Toledo FlowPac-M For PM balances Operating instructions

Mettler Toledo FlowPac-M For PM balances Operating instructions

Mettler Toledo FlowPac-M For PM balances Operating instructions

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