Mettler Toledo SC30 Operating Instructions Manual

Brand: Mettler Toledo

Model: SC30

Type: Operating Instructions Manual

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Setup

Reset

Step

METTLER TOLEDO

SC30

Operating Instructions

Sample Delivery and Cleaning Unit

Table of contents

Introduction1 5

Safety Measure2 6

Layout of the Instrument3 7

The Instrument3.1 7

Terminal3.2 8

Installing SC304 9

Installing the Power Purge Unit (PPU)4.1 13

Sample Vials4.2 14

Connecting SC unit with the Density Meter (DM)4.3 16

Connecting the SC unit with the Refractometer (RM)4.4 17

Connecting the SC unit with the Density Module (DX) combined

with the Refractometer (RM)

4.5 19

Connecting the SC unit with the Refractive Index Modules (RX)

combined with the Density Meter (DM)

4.6 21

Operating of the SC unit5 23

Registering the SC unit in the measuring instrument 5.1 23

Activating additional equipment5.2 23

Useful settings for the measuring instrument5.3 23

Setting up the SC unit5.4 24

Adjusting the measuring instrument5.5 26

Entering an Adjustment method in the measuring instrument5.5.1 26

Performing an adjustment5.5.2 27

Performing the Cell Test (with air) for the Density Meter5.6 28

Entering a measuring method5.7 28

Performing an Offline Cleaning5.7.1 28

Activating Automatic Error Detection5.7.2 28

Setting the Sampling Speed5.7.3 29

Running a pre-defined sample series5.8 29

Defining series5.8.1 30

Using viscosity correction5.8.2 30

Performing a instrument test with a known liquid standard5.8.3 31

Using error detection5.8.4 31

Care and Maintenance6 32

Daily Performance Check6.1 32

Periodic Performance Check6.2 33

Adjusting the Sampling Mechanism6.3 33

Disposal 7 35

Error Messages and Malfunctions8 36

Technical Specifications9 37

Standard Equipment10 38

Connection tubes10.1 40

Optional Accessories11 41

Table of contents 3

1Introduction

The Sample Delivery and Cleaning Unit turns your METTLER TOLEDO Density Meter DM40 / DM45 DeltaRange /

DM50 or Refractometer (RM40 / RM50) or combined with the Refractive Index Modules (DM/RX) or Density

Modules (RM/DX) into a fully automated measuring system for the quality control of liquid samples.

Such a measuring system is capable of

●

measuring series of samples as well as adjusting and checking the instrument automatically at the push of

a button.

●

detecting measuring errors automatically or ruling them out in advance:

•

The samples are pushed and not aspirated (as is often the case in other systems) into the measuring

cell. In most cases this will exclude erroneous measurements due to air bubbles.

•

The sampling nozzle is completely cleaned and dried inside and out after each measurement, depending

on the sequence settings. Sample carryover can be safely ruled out.

•

Before measurement, the samples can be stored in sealable sample vials. The vials are opened by the

Sample Delivery and Cleaning Unit only just before the measurement takes place. A change in the sam

ple's properties due to evaporation or contamination is, therefore, not possible.

•

The most frequent sources of error in measuring refractive indices and densities are air bubbles, inhomo

geneous samples, solvent residues in the system, or scattered light caused by solid particles. These are

automatically recognized by the system and the user is warned accordingly.

●

performing multiple measurements of the samples automatically, and directly displaying and printing the

mean and standard deviation of individual results.

●

preventing permanent contamination of the measuring cell. The measuring system can be rinsed automati

cally with up to two solvents: the ﬁrst solvent removes the sample; the second solvent is a solvent of high

vapor pressure in order to dry the entire system. Both solvents are mixed with air and pumped through the

system at high speed. The resulting pulsating ﬂow causes a mechanical and thus very effective cleaning.

●

fulﬁlling special requirements:

•

The SC unit is able to handle very highly viscous samples. The high pressure built up by the peristaltic

pump used to move the sample into the measuring cell and back into the vial makes it possible to mea

sure samples with a viscosity of up to 30'000 mPa·s.

•

The sampling speed of the SC unit may be adjusted very accurately. If small vials are used for the sam

ples it is possible to perform density or refractive index measurements of samples that are available in

small quantities only.

•

By equipping the SC unit with a highly corrosion resistant sampling nozzle made of Hastelloy (option),

the system is able to handle very aggressive samples such as concentrated hydrochloric acid.

•

The SC unit is able to handle samples which contain particulate material of a small grain size. If the grain

size exceeds 0.4 mm, however, the SC unit needs to be equipped with an external drain valve

(ME51327346).

●

returning the samples to the vial after the measurements. This setting is a must when using the heated ver

sion, to ensure that the sample doesn’t leave the heated area (risk of solidification). The built-in sample

recovery function pushes the samples back into the vials after the measurements (the shortest and quickest

way to empty the cell!).

Thus, the SC unit helps you to reduce the workload associated with measuring densities and refractive indices,

to ensure reliable results and to increase safety in the workplace.

5Introduction

2Safety Measure

These instruments have been tested for the applications documented in the appropriate operating instructions.

However, that does not absolve you of the responsibility to check for yourself the suitability of the products sup

plied by us for the procedures and purposes for which you intend to use them. You should therefore observe the

following safety measures.

Measures for your protection

Risk of electric

shock

●

Ensure that you plug the supplied power cable into a socket that is grounded! In the

absence of grounding, a technical fault could be lethal.

●

Only use the power supply which was supplied with the device.

Risk of explosion

●

Never work in an environment subject to explosion hazards! The housing of the

instrument is not gas tight (explosion hazard due to spark formation, corrosion

caused by the ingress of gases).

●

Test highly combustible, poisonous or corrosive substances under an extractor

hood and follow the normal laboratory rules and precautions.

●

Wear safety glasses and other items for personal safety (protective gloves and

clothing) when working with the equipment. The samples, the rinsing liquids and

the air are under pressure when working with the system. A splashing out of liquids

may therefore not be excluded.

●

Be especially careful when measuring highly viscous samples. The overpressure

created in the vial during sampling may cause the sample to splash out if the sam

pling nozzle is quickly moved out of the membrane.

●

Never work without having the protective cover mounted on the equipment. The

movable parts of the equipment may hurt you.

Risk of corrosion

●

When using chemicals and solvents, comply with the manufacturer's instructions

and the general lab safety rules!

●

If the instrument is not going to be used for a longer period of time, clean the diaphragm pump and tubing

connections by rinsing the instrument with water (for more information about rinsing the instrument, refer to

"Manual operation: Automation> Action: Rinse" in your Operating Instructions of your measuring instru

ment).

●

We recommend storing the instrument in the cardboard box in which it was delivered.

Only have the instrument serviced by an authorized METTLER TOLEDO Service agent!

6 Safety Measure

3Layout of the Instrument

3.1The Instrument

PPU

PPU IN

PPU

Enter

Setup

Reset

Step

METTLER TOLEDO

SC30

SC30 Overview

A Peristaltic pump .

To build up the overpressure for sampling and sample recovery

B Protective cover

The cover protects the user from movable parts (sampling nozzle).

7Layout of the Instrument

C Sampling nozzle

D Rinsing liquid 1 (solvent capable of dissolving the samples, e.g., water)

E Rinsing liquid 2 (highly volatile solvent, e.g., acetone)

F Turntable for 30 samples

G Transportation pin for turntable

This pin is eccentric and allows adjustment of the turntable.

H Foot (height adjustable)

I Protective cover for power switch and ventilator

J Rinsing pot

This is where the sampling nozzle is cleaned and dried after the measurements.

K Potentiometer to adjust the sampling speed

L Air ﬁlter

M Power switch

To switch the SC30 and the connected instrument on and off.

O Terminal

P Desiccator

To dry the measuring cell and the tubing. After a measurement and before an adjustment air is

pumped through the system. This air is drawn in through the desiccator (ﬁlled with silica gel) and

thereby dried.

Q Power supply

Connect the power cable here. The instrument automatically adjusts to the mains voltage of your

country if this lies between 100 and 240 V.

R Power cable to connect the power supply of the measuring system.

T Serial interface

For connecting the measuring instrument with SC30.

V Connector for the waste tube

3.2Terminal

EnterSetup

Reset

Step

METTLER TOLEDO

Buttons Description

Reset Stops all actions of the SC unit and aborts the running task on the main instrument

(emergency stop).

Setup The Setup menu is used to detect the SC unit at the measuring systemTo leave the "Set

up" menu, press Setup again.

Enter Confirms settings in the Setup dialog.

Selects the menu items in the "Setup" menu.

Step Rotates the turntable. If this key is pressed quickly, the turntable rotates one position

forwards (clockwise). If this key is pressed for more than 2 seconds, the turntable

rotates until position 1 is at the sampling position.

8 Layout of the Instrument

4Installing SC30

The Sample Delivery and Cleaning Unit can be connected to all METTLER TOLEDO Density Meters (DM40/

DM45 DeltaRange/ DM50 Density Meters) and Refractometers (RM40/ RM50).

In the following there are instructions for installing the SC unit and to connect it to your measuring instrument.

Enter

Setup

Reset

Step

METTLER TOLEDO

SC30

SC unit front view

●

Put the protective cover (I) for the power switch and the ventilator in the designated holder.

●

Put the turntable (F) on the SC unit.

Make sure that the transportation pin (G) is located in the oval hole of the turntable.

PPU IN

PPU

SC unit rear view

●

Install the desiccator (P) on the SC unit.

●

Connect SC unit with the provided power cable (Q).

The power cable R can be used to connect your measuring system (see below).

9Installing SC30

Rinsing

liquid 1

Rinsing

liquid 2

●

Prepare the rinsing liquids.

Fill one bottle (rinsing liquid 1) with a solvent capable of dissolving your samples (e.g., water if you are

measuring aqueous solutions) and the other (rinsing liquid 2) with a highly volatile solvent (e.g., acetone).

●

Place the bottles in the holder.

t1 / t2

●

Push the tubes for the rinsing liquids (t1 and t2) through the bottle's covers and install the filters (a). Screw

the covers onto the bottles.

●

Connect the tubes for the rinsing liquids to the SC unit (t1 to input "RINSE 1"; t2 to input "RINSE 2") and

screw them tight by hand.

10 Installing SC30

PPU IN

PPU

SC pump compartment view

●

Put an appropriate waste receptacle (e.g., a plastic canister, not included) under the lab table.

•

Put the screw and the plastic seal (ring) onto the thick waste tube (t10).

•

By hand, screw tube (t10) tightly onto the "DRAIN" connector.

•

Place the other end of the tube in the waste receptacle.

•

Caution! The waste receptacle may not be hermetically sealed! The air used for pumping and drying must

be able to escape unhindered!

●

Place an empty vial in a position before the vial holder.

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Using the step key, position the vial just right of the sampling needle.

The sampling nozzle will not move when no vial is detected at this position!

Sampling nozzle

Prepare the sampling nozzle as follows:

●

Switch on SC unit.

●

Press the -key.

- The sampling nozzle is going up.

Note: An audio-signal will sound if no vial is detected at the current position.

●

Press Reset as soon as the sampling nozzle is up between the rinsing pot and the turntable.

●

Completely screw the locknut (e) onto the tube (t5).

●

By hand, screw the tube (t5) clockwise into the sampling nozzle and tighten the locknut clockwise

●

Connect the other end of the tube (t5) to the "TO NOZZLE" port on the SC unit (see figure above: "SC pump

compartment view").

11Installing SC30

●

By hand, tighten the connection well in the clockwise direction.

●

Place the seal (c, a white Teflon washer) into the thread above the sampling nozzle. The system will leak if

that Teflon washer is missing!

●

By hand, tighten the inlet tube of your measuring system (t3) on the sampling nozzle well in the clockwise

direction. Then tighten the locknut (d) well by hand in the clockwise direction.

Before the measurement the sampling nozzle is pressed onto the sample vial, and the sample vial is sealed

with a perﬂuoroelastomer seal. Air is pumped into the vial through a collar and the sample, due to the pressure

build up, is pressed into the measuring cell of the attached measuring instrument. If the sample recovery func

tion is activated, the sample is pushed back into the vial after the measurement. The sampling nozzle moves to

the rinsing pot where it is cleaned and dried inside and out.

Vial holder orientation

●

The horizontal orientation of the sample vial holder is adjusted with 2 screws (x).

Adjust the turntable

1 Close a vial with a cap and put it onto the turntable one position before the sampling position.

2 Press Step on the SC unit.

The vial moves into the sampling position.

3 Press the -key.

The sampling nozzles moves to the vial.

4 Press Reset before the needle of the sampling nozzle touches the membrane of the vial.

5 Verify the correct adjustment of the turntable by repeating the steps a) to d) above for at least 2 vials.

Repeat the adjustment if necessary.

12 Installing SC30

If the needle of the sample nozzle should not be in the center of the membrane, loosen the screw of the trans

portation pin (G) and turn it until the needle is located exactly in the center of the vial. Make sure not to touch

the turntable while adjusting it in order to avoid a faulty adjustment of the turntable due to the play of its drive.

Tighten the screw of the transportation pin (G).

4.1Installing the Power Purge Unit (PPU)

Power Purge Unit㩷

t13

PPU IN

PPU

The Power Purge Unit (PPU) is an external diaphragm pump. It has a considerably higher delivery rate than the

diaphragm pump (P1), which is built-in in the SC unit. The PPU pumps additional dry air to the system during

the first rinsing cycle and the drying procedure. This drastically reduces the time required to complete the clean

13Installing SC30

ing procedure: In general, depending on the viscosity and stickiness of the sample, rinsing times for the first

rinsing procedure are cut by half and the drying time required is cut down to approximately 20%.

The Power Purge Unit is required for cleaning and drying when working with the heated version of the SC unit.

The Power Purge Unit is installed as follows:

1 Remove the plug from the tube connector "PPU IN" of the SC unit.

2 Screw the Connection tube t13 of the PPU into this connector.

3 Test for tightness: Gently pull on the Teflon tube. If you have the feeling that the tube end is still moving ever

so slightly, you need to tighten this screw even more, until the tube end is firmly pressed against its socket.

4 Attach the cable (y) of the Power Purge Unit to the power outlet marked with "PPU"on the SC unit.

5 Install the drying tower (z) on the PPU.

6 Position the PPU in such a way that it is slightly elevated to the SC unit (on the SC unit, on an elevated shelf

behind the SC).

Operating the measuring system is done in the same way, with or without the use of a PPU. However, you

have to consider during the setup of the instrument, that you have to enter appropriate times to specify the dura

tion of drying the measuring cells. The high flow rate of dry air from the PPU results in the Auto Purge function

"Purge Auto" of the sequence to react very slowly. This results in unnecessary long drying times.

Therefore you should always use the setting "Purge Set" for the drying process of the measuring cells. If you

use acetone as second rinsing liquid, please use the following times to specify the duration of the drying proce

dure, independently of the used measuring instrument.

Method for adjustments: "Purge Time": 90 s

Method for measurements: "Purge Time": 30 s

If you use ethanol as the second rinsing liquid, enter in both cases the double span of time for the drying proce

dure.

For special samples, like for example honey (very sticky), or concentrated acids or bases (strongly exothermal

reaction with water) it could be advantageous to adapt the air: water ratio in the rinsing cycle of the SC unit (in

the respective method function of your density meter). You can change this in the Clean function of your mea

suring method: Change the air addition to ‘Low’ or to ‘Very low’.

To use the Power Purge Unit, you have to activate it in the "Setup" of your measuring system (refer to the refer

to the Operating Instructions of you measurement instrument:: "Setup > Hardware > Automation").

4.2Sample Vials

METTLER TOLEDO offers two different types of sample vials suitable for the SC unit Sample Delivery and Clean

ing Unit (see picture).

14 Installing SC30

●

20 mL sample vials. These vials are available in borosilicate glass or in PP. They can be used without

cap, or they can be sealed with a cap with built-in membrane. We recommend to close the vials with a cap

for the following cases:

•

The membrane prevents the properties of the sample from changing due to evaporation or contamination

prior to the measurement.

•

The sampling nozzle is wiped off after the measurements before it moves to the rinsing pot for cleaning.

Advantage: Less time and cleaning solvent required to clean the sampling nozzle, no drops of the sample

may fall down onto the instrument when the nozzle moves from the vial to the rinsing pot.

•

The sealing of the vial during sampling is better. The sealing is done by the sampling nozzle directly on

the cap. When measuring very highly viscous samples, the time required for sampling is shorter if a

sealed vial is used.

●

6 and 9 mL sample vials. These small vials (3, 4) have to be used with an adaptor (5, order no.

51322304) and must always be sealed with a membrane (6, order no. 51322305). Before and after

measurements, these vials may be sealed with a screw cap (order no. 51322306). If you clean and dry

the system after each measurement or if you work with a Heating Option, we recommend you use this type

of vial.

To seal these types of vials, always make sure that the slits in the membrane face down (into the vial). If

this is not the case, a piece of the membrane could be cut by the sampling needle and clog the tubings!

15Installing SC30

4.3Connecting SC unit with the Density Meter (DM)

PPU IN

PPU

PPU IN

PPU

Enter

Setup

Reset

Step

METTLER TOLEDO

SC30

Power Supply

SC 30 connected with the density meter (DM)

●

Place your measuring instrument to the left of the SC unit on the lab table.

●

Connect the "RS" port on the SC unit with the "Automation" port on the measuring instrument with the

RS232 cable (m). Tighten the connectors on both ports.

Connect tube (t3).

Mount the locknut at the free end of (t5), connect it to the sample nozzle (angled connector at front), and

secure the locknut.

●

Connect the tubes to the measuring cell as shown in the pictures above.

●

Mount the locknut at the free end of (t5), connect it to the sample nozzle (angled connector at front), and

secure the locknut.

●

Loosen the holder (k) for the tubes on the left side of the sampling mechanism of the SC unit.

●

Pull the relevant tubes through the tube holder and tighten the holder. Make sure that the length of the tubes

above the tube holder allows for complete free movement back and forth by the sampling nozzle!

●

Attach tube (t6) to the output of the measuring module and to the "MEAS.CELL" connection on the back of

the SC unit (see figure above "SC unit rear view").

●

Connect SC unit with the power cable (j).

16 Installing SC30

●

Connect the SC unit to the power supply of the measuring instrument with the power cable. Connect the

power socket of your measuring instrument with the provided cable (n).

4.4Connecting the SC unit with the Refractometer (RM)

PPU IN

PPU

Power Supply

PPU IN

PPU

Enter

Setup

Reset

Step

METTLER TOLEDO

SC30

SC 30 connected with RM

●

Install the Refractive Index Flow Cell on the Refractometer RM (refer to the Installation Information: "Refrac

tive Index Flow Cell").

●

Place your measuring instrument to the left of the SC unit on the lab table.

17Installing SC30

●

Connect the "RS" port on the SC unit with the "Automation" port on the measuring instrument with the

RS232 cable (m). Tighten the connectors on both ports.

Connect tube (t3).

Mount the locknut at the free end of (t5), connect it to the sample nozzle (angled connector at front), and

secure the locknut.

●

Connect the tubes to the measuring cell as shown in the pictures above.

●

Mount the locknut at the free end of (t5), connect it to the sample nozzle (angled connector at front), and

secure the locknut.

●

Loosen the holder (k) for the tubes on the left side of the sampling mechanism of the SC unit.

●

Pull the relevant tubes through the tube holder and tighten the holder. Make sure that the length of the tubes

above the tube holder allows for complete free movement back and forth by the sampling nozzle!

●

Attach tube (t6) to the output of the measuring module and to the "MEAS.CELL" connection on the back of

the SC unit (see figure above "SC unit rear view").

●

Attach tube t6 and t4 to the flow cell of the Refractometer (RM).

●

Connect SC unit with the power cable (j).

●

Connect the SC unit to the power supply of the measuring instrument with the power cable. Connect the

power socket of your measuring instrument with the provided cable (n).

18 Installing SC30

4.5Connecting the SC unit with the Density Module (DX) combined with the

Refractometer (RM)

PPU IN

PPU

SC30

SC30:

“TO NOZZLE“

RM in

RM out

DX in

DX out

SC30:

“MEAS. CELL“

Enter

Setup

Reset

Step

METTLER TOLEDO

SC30

PPU IN

PPU

Power Supply

SC30 connected with DX combined with RM

●

Place the Density Module (DX) to the left on the Refractometer (RM).

●

Connect the the Density Module (DX) with the Refractometer (RM). For more information about connecting

the DX module to RM, refer to "DX Installation Information: Getting Started".

●

Place the measuring instruments to the left of the SC unit on the lab table.

●

Connect the "RS" port on the SC unit with the "Automation" port on the measuring instrument with the

RS232 cable (m). Tighten the connectors on both ports.

19Installing SC30

●

Connect tube (t4).

Mount the locknut at the free end of (t5), connect it to the sample nozzle (angled connector at front), and

secure the locknut.

●

Attach tube (t3) to the output of RM and to the input of DX (low-lying connector).

●

Connect the tubes to the measuring cell as shown in the pictures above.

●

Mount the locknut at the free end of (t5), connect it to the sample nozzle (angled connector at front), and

secure the locknut.

●

Loosen the holder (k) for the tubes on the left side of the sampling mechanism of the SC unit.

●

Pull the relevant tubes through the tube holder and tighten the holder. Make sure that the length of the tubes

above the tube holder allows for complete free movement back and forth by the sampling nozzle!

●

Attach tube (t6) to the output of the measuring module and to the "MEAS.CELL" connection on the back of

the SC unit (see figure above "SC pump compartment view").

●

Connect SC unit with the power cable (j).

●

Connect the SC unit to the power supply of the measuring instrument with the power cable. Connect the

power socket of your measuring instrument with the provided cable (n).

20 Installing SC30

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Mettler Toledo SC30 Operating Instructions Manual

Mettler Toledo SC30 Operating Instructions Manual

Mettler Toledo SC30 Operating Instructions Manual

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