Mettler Toledo Cub-II Service Manual

Cub-II

Weight Only Scale

Service Manual

Version:1.0 (03/03)

CONTENTS

1

Introduction ....................................................................................... 1-1

2

Installation......................................................................................... 2-1

3

Set up and Calibration ......................................................................... 3-1

4

Operating Instructions.......................................................................... 4-1

5

Operations......................................................................................... 5-1

6

Over/Under ........................................................................................ 6-1

7

Batteries............................................................................................ 7-1

8

Service and Maintenance ..................................................................... 8-1

9

Parts and Accessories ......................................................................... 9-1

Introduction

CUB II Service Manual 1-1

1 Introduction

Thank you for purchasing the Cub II weigh only scale, designed for various weighing applications.

1.1 Cub II Overview

The Mettler Toledo model Cub II is a stand-alone weigh only scale designed to meet the needs of a worldwide
market. According to working environment, 3 versions are available including RW10, RW11 and RW12.

1.1.1 Reliability

The Cub II was developed, produced, and tested in a Mettler Toledo facility that has been audited and registered
according to international ISO 9001 quality standards and ISO 14000 environment control program.

1.1.2 Standard Features

Not all features are available in all models.

+ Capacity: 600gx0.2g; 1.5x0.5g; 3x0.001kg; 6x0.002kg;15 x 0.005kg

1.5x0.0005lb; 3x0.001lb; 6x0.002lb; 15x0.005lb; 30x0.01lb

+ Average updating speed: up to 0.8 seconds
+ Accuracy: 3000 approved*, 6000/7500 maximum displayed

+ Platter: stainless steel: 180X230mm, x?x (600g only)
+ Display: LCD: 19 mm high, optional backlight is available, 6 digits.

LED: 14 mm high, red, 6 digits.

+ Different display updating style: normal updating or holding display.

+ Keyboard: 4 touch keys with a tactile and tone feedback upon key closure.
+ Power supply: External 9VDC/500mA power supply.

6V/5Ah lead-acid rechargeable battery.
6 1# D-cells (LCD version only).

Clever battery capacity indication gives you more convenience of use of battery (LCD version only).

+ Enclosure: Plastic or SS top and plastic bottom covers, SS spiders (top/lower).

+ Basic functions: zero; tare; on/off, over and under.
+ IP 65
+ Sealing: The following 3-level sealing will be available for some models. Battery is in a sealed and separated

housing.

First level rubber ring sealing is between up cover and base and spider and up cove;
The second rubber ring sealing is for both main PCB and back PCB, the two housing for two PCB are
also be separated
The third glue sealing is for main PCB.

* 600g is not approved.

1.1.3 Option

Big SS platter sized 200X290mm

1.1.4 Physical Dimensions

1.1.5 Power

Power supply

Introduction

1-2 CUB II Service Manual

+ External 9VDC/500mA power supply.
+ 6V/5Ah lead-acid rechargeable battery.
+ 6 1# D-cells (LCD version only).

Notice: non-rechargeable battery can not be used in the scale with charging function.
The Work time is battery capacity/ working current.
Please use these calculated data as an indication, data will vary, depending on supplier, environment, age, way of
usage, etc.

1.1.6 Load Cell

The capacity of the analog load cell versus the capacity of the scale is as follows:

Capacity of the scale

600g 1.5kg/3lb 3kg/6lb 6kg/15lb 15kg/30lb 30kg/60lb

Capacity of the load cell 1kg 3.5kg 6.5kg 15kg 30kg 40kg

Resistance of the load cell 1000 ohm 350 ohm 350 ohm 350 ohm 350 ohm 350 ohm

1.1.7 Temperature and Humidity

Working temperature range: from -10 to +40 oC (+14 to +114F) at following humidity:

+ RW10: dry, 10 to 85% humidity, non-condensing.
+ RW11: IP 65, 10 to 85% humidity, non-condensing.
+ RW12: damp.

Storage temperature range: from -25 to +50oC at 10 to 85% humidity, non-condensing.

1.1.8 Weights and Measures Approval



UL60950: The approval number is:xxxxxxxx



OIML 3000e: The approval number is: xxxxxxx



Factory Audit OIML (first step) by the Eichdirektion Stuttgart

For most EU countries the Cub II will be factory stamped.

Introduction

CUB II Service Manual 1-3

1.2 Model Configuration

LED Version:

RWXX - X X X X -Country Code

0: Double Sides
1: Single Side display

Power 0: AC

2: AC/DC ( Lead-acid Rechargeable )

Display 2=LED

Capacity: 1: 1.5kg/3lb

2: 3kg/6lb
3: 6kg/15lb
4: 15kg/30lb
6: 0.6kg/1.5lb

RW serial Cub II weigh only scale
10: Dry application
11: IP 65
12: damp

LCD Version:

RWXX - X X X X -Country Code

0: Double Sides
1: Single Side display

Power 0: AC

1: DC D-cell not in the scale
2: DC Lead-acid Rechargeable

Display 1=LCD

Capacity: 1: 1.5kg/3lb

2: 3kg/6lb
3: 6kg/15lb
4: 15kg/30lb
5: 30kg/60lb
6: 0.6kg/1.5lb

RW serial Cub II weigh only scale
10: Dry application
11: IP 65
12: damp

Notice: to Stainless steal version, the model will be RWXX-XXXXS-XXX. The difference between SS version and
plastic version (RWxx-xxxx-xxx) is just the one part, up cover, one is plastic, and the other is SS.

Installation

CUB II Service Manual 2-1

2 Installation

2.1 Precautions

This chapter gives detailed instructions and important information to install the Cub II scale successfully.

2.2 Environment

Before you install the scale, identify the best location for the equipment. The proper environment enhances its
operation and longevity. Keep in mind the following factors, which might have a negative influence on the scale's
operation:

+ Vibration

Vibration diminishes the scale’s ability to measure accurately. Electrical machinery such as conveyors and drill
presses can cause inaccurate and non-repeatable readings. The scale may also read inaccurately if it is not leveled
properly.

+ +Air current

Moving air can cause the scale to read an additional force (add. weight) and have the same effect as vibration.

+ +Friction

A scale cannot measure accurately if an object is rubbing or pressing against the plate.

2.3 Unpacking and inspection

Please inspect the package as it is delivered by the carrier. If the shipping container is damaged, check for internal
damage and file a freight claim with the carrier if necessary. If the container is undamaged, open the box, remove
the scale and place it on a solid, flat surface. Please keep the packing material and shipping insert in case you
need to return the scale to METTLER TOLEDO. The Cub II is a precision instrument and may be permanently
damaged if not shipped in factory approved packaging.
Package contents for all Cub II units include:
Package contents for all Cub II units include:
+ Cub II scale + platter+ AC-DC power adapter + operation manual

2.4 Setup

Open the box and pull up the scale, including the packing material. Remove the packing material from each side of
the scale.
Set the unit on a sturdy, level surface. Level the scale by turning the adjustable feet on the bottom of the unit. When
the bubble indicator is in the centre of the circle, Cub II is leveled correctly.

Bubble indicator: Good Wrong

All four feet must touch the surface to make sure that Cub II does not rock.
Put the platter on top of Cub II.
If no battery is in the scale, unpack the power adapter and plug it into the bottom of the scale. Plug the line cord
into a properly grounded AC power outlet.

2.5 Power up sequence and Turn Off the Scale

Press the power key turn on the Cub II. It goes through a series of self-tests when it is turned on. The scale
performs a diagnostic test on its ROM and RAM, and proceeds to normal operating mode. The power-up sequence
is as follows:

•

Light all segments of the display characters. This verifies operation of all segments.

•

Display the software part number, revision number, GEO value and battery type one by one.

•

Capture zero and be ready for normal operation.

Note: Before switching on the Cub II scale, always make sure there is nothing on the platter.
Press the power key until “OFF” is shown to turn off the scale.

Installation

2-2 CUB II Service Manual

2.6 Sealing

After installation is complete, most legal-for-trade applications require sealing the enclosure so settings cannot be
changed.

There are two kinds of sealing, one is lead wire sealing, the other is sticker sealing

2.6.1 The lead wire sealing

•

Install special through-hole sealing screw.

•

Tighten these two screws and run a wire seal through the holes in the heads of the screws.

•

Apply the seal.

2.6.2 Sticker Sealing

Security Sticker Ø 15mm material Vinyl white 3690 E UL, colour red, type black.

The position for the sealing and stamping stickers is shown below.

Lead head

Sealing plate

Sealing plate

MTCN