Cooper 3i User Manual
Model 3i
DIGITAL FORCE / TORQUE INDICATOR
User’ s Guide
Model 3i Digital Force/Torque Indicator User’s Guide
Thank you…
Thank you for purchasing a Mark-10 Model 3i digital force / torque
indicator, designed for use with interchangeable remote force and torque
sensors. A 3i-sensor combination can be used with some Mark-10 test
stands grips, and data collection software.
With proper usage, we are confident that you will get many years of great
service with this product. Mark-10 instruments are ruggedly built for many
years of service in laboratory and industrial environments.
This User’s Guide provides setup, safety, and operation instructions.
Dimensions and specifications are also provided. For additional
information or answers to your questions, please do not hesitate to
contact us. Our technical support and engineering teams are eager to
assist you.
Before use, each person who is to use a Model 3i indicator should be fully trained in appropriate
operation and safety procedures.
TABLE OF CONTENTS
OVERVIEW .........................................................2
POWER ...............................................................4
MECHANICAL SETUP .......................................5
HOME SCREEN AND CONTROLS ...................6
OPERATING MODES .........................................8
CHANGING THE UNITS .....................................9
DIGITAL FILTERS ..............................................9
SET POINT INDICATORS ..................................9
COMMUNICATIONS ........................................10
CALIBRATION .................................................13
OTHER SETTINGS ...........................................17
SPECIFICATIONS ............................................20
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Model 3i Digital Force/Torque Indicator User’s Guide
1 OVERVIEW
1.1 List of included items
Qty. Part No. Description
1 12-1049 Carrying Case
1 08-1022 AC adapter body with US, EU, or UK prong
1 08-1026 Battery (inside the indicator)
1 - Certificate of conformance
1 09-1165 USB cable
1 - Resource CD (USB driver, user’s guides, MESURTM Lite
software, MESUR
1.2 General Overview
From left to right: Model 3i indicator with Series R03
force sensor, and Model 5i indicator with Series R50
torque sensor
numbers are also identified in the Information screen of the indicator.
1.3 Accuracy and Resolution
Indicator accuracy must be combined with sensor accuracy to determine the total accuracy of the system.
Since sensors may be used with either the 5i or 3i indicator, the accuracy of the indicator being used
must be identified and taken into account, as follows:
Indicator Model Accuracy
5i ±0.1% of full scale ±1 digit
3i ±0.2% of full scale ±1 digit
The addition of “±1 digit” refers to the least significant digit shown on the indicator display. This is
equivalent to one increment of resolution. The resolution may be different for some sensors depending on
whether a 5i or 3i indicator is being used. For example, a Series R01 force sensor will display finer
resolution when connected to a 5i indicator than when connected to a 3i indicator. Resol ution information
is shown in the sensors’ user’s guides.
The total system accuracy can be calculated by adding the sensor accuracy, indicator accuracy, and one
count of resolution. Refer to the following examples:
TM
gauge DEMO software, User’s Guide)
The 3i is a universal indicator designed for displaying
measurements from interchangeable Mark-10 Plug &
TM
Test
sensors. Sensor capacities are available from 0.25
to 10,000 lbF (1 N to 50 kN) of force, and from 10 ozFin to
5,000 lbFin (7 Ncm to 550 Nm) of torque. These sensors
can be handheld or mounted to a fixture or test stand for
more sophisticated testing requirements.
Plug & Test
TM
sensors are used with either the 3i or 5i
indicator. They may be disconnected from one indicator
and connected to another without the need for recalibration or re-configuration. All such data is saved
within a PCB located inside the smart connector.
The model number, serial number, and capacity of the
sensor are identified in the rectangular label located on
the Plug & Test
TM
connector. The model and serial
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Model 3i Digital Force/Torque Indicator User’s Guide
Example 1
Model MR50-50Z sensor with Model M3i Indicator
MR50-50Z
±0.35% of full scale
This translates into a fixed error of up to:
0.55% x 50 ozFin = 0.275 ozFin + 0.02 ozFin = 0.295 ozFin
Example 2
Model MR01-100 sensor with Model M5i Indicator
MR01-100
±0.15% of full scale
This translates into a fixed error of up to:
0.25% x 100 lbF = 0.25 lbF + 0.05 lbF = 0.30 lbF
Because accuracy is defined as a percentage of full scale, the fixed error is possible anywhere on the
scale from 0 to the capacity. As such, this value represents an increasingly large error as percentage of
reading towards the low end of the scale. It is, therefore, recommended that a sensor is selected with
capacity as close as possible to the expected load.
1.4 Safety / Proper Usage
Read through the following safety instructions thoroughly before using the 3i with a sensor:
1. Note the sensor’s capacity before use and ensure that the capacity is not exceeded. Producing a
load greater than the indicated safe overload value can damage the sensor. An overload
can occur whether the sensor’s indicator is powered on or off.
2. In order to extend the life of the sensor, avoid repetitive shock and impact loading.
3. When moving the sensor to another location, never lift from the cable or strain relief. This can
cause damage to the sensor. Always lift the sensor housing itself.
4. Always ensure that load is applied axially with respect to the sensor.
5. Ensure that the sensor is kept away from water or any other electrically conductive liquids at all
times.
6. The sensor and indicator should be serviced by a trained technician only. AC power must be
disconnected and the indicator must be powered off before the housing is opened.
7. Always consider the characteristics of the sample being tested before initiating a test. A risk
assessment should be carried out beforehand to ensure that all safety measures have been
addressed and implemented.
8. Typical materials able to be tested include many manufactured items, such as springs, electronic
components, fasteners, caps, films, mechanical assemblies, and many others. Items that should
not be used with the sensor include potentially flammable substances or products, items that can
shatter in an unsafe manner, and any other components that can present an exceedingly
hazardous situation when acted upon by a force. Always wear eye and face protection whe n
±0.2% of full scale
+
±0.1% of full scale
+
M3i
±1 digit
M5i
±1 digit
=
=
Total
±0.55% of full scale
±1 digit
Total
±0.25% of full scale
±1 digit
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Model 3i Digital Force/Torque Indicator User’s Guide
testing, especially in aforementioned hazardous cases. Extra bodily protection should be worn if a
destructive failure of a test sample is possible.
9. In aforementioned hazardous situations, it is strongly recommended that a machine guarding
system be employed to protect the operator and others in the vicinity from shards or debris.
10. Sensors have threaded holes or chucks, designed for the mounting of grips, fixtures, or
attachments. If any such accessories are used, ensure they are mounted firmly to prevent a
potential safety risk to the operator and others in the vicinity. If using an accessory from a supplier
other than Mark-10, ensure that it is constructed of suitably rugged materials and components.
Similar precautions should be taken when mounting the sensor to a test stand, work bench, or
other piece of equipment.
2 POWER
The 3i is powered either by an 8.4V NiMH rechargeable battery or by an AC adapter. Since these
batteries are subject to self discharge, it may be necessary to recharge the unit after a prolonged period
of storage. Plug the accompanying charger into the AC outlet and insert the charger plug into the
receptacle on the indicator (refer to the illustration below). The battery will fully charge in approximately 8
hours.
USB connector
Power input jack
Caution!
Do not use chargers or batteries other than supplied or instrument damage may occur.
If the AC adapter is plugged in, an icon appears in the lower left corner of the display, as follows:
If the AC adapter is not plugged in, battery power drainage is denoted in a five-step process:
1. When battery life is greater than 75%, the following indicator is present:
2. When battery life is between 50% and 75%, the following indicator is present:
3. When battery life is between 25% and 50%, the following indicator is present:
4. When battery life is less than 25%, the following indicator is present:
5. When battery life drops to approximately 2%, the indicator from step 4 will be flashing.
Several minutes after (timing depends on usage and whether the backli ght is turned on or
off), a message will appear, “BATTERY VOLTAGE TOO LOW. POWERING OFF”. A 4-tone
audio indicator will sound and the indicator will power off.
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Model 3i Digital Force/Torque Indicator User’s Guide
The indicator can be configured to automatically power off following a period of inactivity. Refer to the
Other Settings section for details.
If battery replacement is necessary, the battery may be accessed by loosening the two captive screws in
the rear half of the housing and separating the two halves of the housing.
3 MECHANICAL SETUP
3.1 Connecting a sensor
The Plug & Test
marked “Plug & Test
into place with a “click”.
TM
connector must be inserted into the receptacle of the 3i or 5i indicator with the side
TM
Technology” facing up (see Fig. 3.1). When fully inserted, the connector will lock
Fig. 3.1
Appropriate orientation of Plug & Test
Sensor model number, serial number, and load
capacity information may be found on the labels
affixed to the connector.
TM
connector.
To release the connector, press both buttons on either side of the indicator housing to release the sensor
(see Fig. 3.2). Pull the connector completely out of the indicator by holding the curved aluminum section.
DO NOT pull on the cable or strain relief.
Fig. 3.2
Press both buttons on either side of the indicator
housing to release the Plug & Test
TM
connector.
3.2 Mounting to a plate
The 3i can be mounted to a plate with four thumb screws fastened into the appropriate holes in the rear
half of the housing. Refer to the Dimensions section for detailed hole information and locations.
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Model 3i Digital Force/Torque Indicator User’s Guide
4 HOME SCREEN AND CONTROLS
4.1 Home Screen
9
No. Name Description
1 Measurement
2 Peaks
3 Primary reading
4 Load bar
5 Units
8
7
direction
indicator
– indicates compression direction (for force sensors)
– indicates tension direction (for force sensors)
– indicates clockwise direction (for torque sensors)
– indicates counter-clockwise direction (for torque sensors)
These indicators are used throughout the display and menu.
The maximum measured compression/tension or clockwise/counter-clockwi se
readings. These readings are reset by pressing ZERO or by powering the
indicator off and on.
The current displayed load reading. See Operating Modes section for
details. If a sensor is not plugged in, this value will be replaced by a message,
as follows: SENSOR NOT CONNECTED
Analog indicator to help identify when an overload condition is imminent. The
bar increases either to the right or to the left from the midpoint of the graph.
Increasing to the right indicates compression or clockwise load, increasing to
the left indicates tension or counter-clockwise load. If set points are enabled,
triangular markers are displayed for visual convenience. This indicator reflects
the actual load, which may not correspond to the primary reading (depends
on operating mode). The ZERO key does not reset the load bar. See
Operating Modes section for details.
The current measurement unit. Abbreviations are as follows:
Force units:
lbF – Pound-force
ozF – Ounce-force
kgF – Kilogram-force
gF – Gram-force
N – Newton
kN – Kilonewton
1
2
3
4
56
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Model 3i Digital Force/Torque Indicator User’s Guide
Torque units:
lbFin – Pound-inch
ozFin – Ounce-inch
kgFm – Kilogram-meter
kgFmm – Kilogram-millimeter
Nm – Newton-meter
Ncm – Newton-centimeter
Note: not all sensor models display all the above units. Refer to the capacity /
resolution table for the respective sensor series for details.
6 Mode
The current measurement mode. Abbreviations are as follows:
RT – Real Time
PC – Peak Compression (for force sensors)
PT – Peak Tension (for force sensors)
PCW – Peak Clockwise (for torque sensors)
PCCW – Peak Counter-clockwise (for torque sensors)
See Operating Modes section for details about each of these modes
7 Battery / AC
adapter indicator
8 High / low limit
indicators
Either the AC adapter icon or battery power icon will be shown, depending on
power conditions. Refer to the Power section for details.
Correspond to the programmed set points. Indicator definitions are as follows:
– the displayed value is greater than the upper load limit
– the displayed value is between the load limits
– the displayed value is less than the lower load limit
9 Set points
The programmed load limit values. Typically used for pass/fail type testing.
One, two, or no indicators may be present, depending on the configuration
shown in the Set Points menu item.
4.2 Controls
Primary
Label Primary Function
Powers the indicator on and off.
Press briefly to power on, press and
hold to power off. Active only when
Secondary
Label Secondary Function
ENTER
Various uses, as described in the
following sections.
the home screen is displayed.
ZERO
MENU
Zeroes the primary reading and
peaks.
Enters the main menu.
(UP)
ESCAPE
Navigates up through the menu and
sub-menus .
Reverts one step backwards through
the menu hierarchy.
MODE
DATA
Toggles between measurement
modes.
Transmits the current reading to an
external device via the USB port.
(DOWN)
DIRECTION
Navigates down through the menu
and sub-menus.
Toggles between tension and
compression (or clockwise and
counter-clockwise) directions while
configuring set points and other menu
functions.
Note: Measurement units are configured through the menu. Refer to Section 6 for details.
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