Cooper 7i User Manual

Users Guide

Model 7i Digital Force/Torque Indicator

CF 195

www.cooperinstruments.com

PH: 540-349-4746  FAX: [phone]

Model 7i Digital Force / Torque Indicator User’s Guide

Thank you…

Thank you for purchasing a Mark-10 Model 7i force/torque indicator, designed for
use with interchangeable remote force and torque sensors. A 7i-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 the 7i should be fully trained in
appropriate operation and safety procedures.

TABLE OF CONTENTS

OVERVIEW .........................................................2

POWER ...............................................................3

SETUP ................................................................4

HOME SCREEN AND CONTROLS ...................5

DIGITAL FILTERS ..............................................7

SET POINTS .......................................................8

BREAK DETECTION ..........................................9

OPERATING MODES .......................................11

DATA MEMORY AND STATISTICS ................19

FOOTSWITCH ..................................................21

COEFFICIENT OF FRICTION ..........................22

CUSTOM UNIT .................................................22

COMMUNICATIONS AND OUTPUTS .............23

CALIBRATION .................................................28

PASSWORDS ...................................................33

OTHER SETTINGS ...........................................34

SPECIFICATIONS ............................................36

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Model 7i 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, MESURTM Lite software,

MESUR

1.2 General Overview

From left to right: Model 5i indicator with Series R01 force
sensor, Model 3i indicator with Series R02 force sensor, and
Model 7i indicator with Series R50 torque sensor

and serial 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 7i, 5i or 3i indicator, the accuracy of the indicator being used
must be identified and taken into account, as follows:

Indicator Model Accuracy

7i / 5i ±0.1% of full scale
3i ±0.2% of full scale

The total system accuracy can be calculated by adding the sensor accuracy and indicator accuracy.
Refer to the following examples:

TM

gauge DEMO software, User’s Guide)

The 7i 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 7i, 5i,
or 3i indicators. They may be disconnected from one
indicator and connected to another without the need
for re-calibration 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

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Model 7i Digital Force / Torque Indicator User’s Guide

Example 1

Model MR01-100 sensor with Model 7i 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
Example 2

Model MR50-50Z sensor with Model 3i 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

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.

The resolution may be different for some sensors depending on whether a 7i, 5i, or 3i indicator is being
used. For example, a Series R01 force sensor will display finer resolution when connected to a 7i
indicator than when connected to a 3i indicator. Resolution information is shown in the sensors’ user’s
guide.

1.4 Safety / Proper Usage

Read through the following safety instructions thoroughly before using the 7i 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 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.

+

±0.1% of full scale

+

±0.2% of full scale

7i

3i

=

=

Total

±0.25% of full scale

Total

±0.55% of full scale

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Model 7i Digital Force / Torque Indicator User’s Guide

r

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 load. Always wear eye and face protection whe n
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 7i is powered either by an 8.4V NiMH rechargeable battery or by an AC adapter. Since the 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

Serial connecto

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

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Model 7i Digital Force / Torque Indicator User’s Guide

off), a message appears, “BATTERY VOLTAGE TOO LOW. POWERING OFF”. An audio
tone will sound and the indicator will power off.

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, it can be accessed by separating the two halves of the indicator.
Refer to the Setup section for details.

3 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 7i, 5i, or 3i 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
number, serial number, and load capacity may be found on the
labels affixed to the connector.

TM

connector. Sensor model

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

TM

& Test

connector.

3.2 Sensor connector orientation

In order to accommodate a variety of testing requirements, the orientation of the Plug & Test

TM

connector
may be set up in either of the two positions shown below. To change the orientation, loosen the two
captive screws on the back side of the housing, separate the two housing halves, rotate one half 180
degrees, and reassemble. Contact between the two halves is made by the spring pins and contact pads

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Model 7i Digital Force / Torque Indicator User’s Guide

on the printed circuit boards.

3.3 Mounting to a plate
The 7i 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.

Sensor connector

oriented up

Sensor connector

oriented down

3.4 Installing the USB driver

If communicating via USB, install the USB driver provided on the Resource CD. Installation instructions
may also be found on the CD or may be downloaded from www.mark-10.com

.

Caution!

Install the USB driver before physically connecting the indicator to a PC with the USB cable.

Further instructions for configuring and using the indicator’s outputs are provided in the Communications
and Outputs section.

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Model 7i Digital Force / Torque Indicator User’s Guide

4 HOME SCREEN AND CONTROLS

4.1 Home Screen

1

13

12

11

10

No. Name Description
1 Measurement

direction
indicator

2 Compression /

Clockwise peak

3 Tension /

Clockwise peak /
Static COF

4 Primary reading /

Kinetic COF

5 Load bar

6 Units

– 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 or clockwise value. This value may be
reset by pressing ZERO or by powering the indicator off and on.
The maximum measured tension or counter-clockwise value. If the COF unit
is selected, this represents the static coefficient of friction. May be reset by
pressing ZERO or by powering the indicator off and on.
The current displayed load reading. When the COF unit is selected, this
reading represents the kinetic coefficient of friction upon completion of an
Averaging sequence. 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

7

689

2
3

4

5

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Model 7i Digital Force / Torque Indicator User’s Guide

N – Newton
kN – Kilonewton
mN – Millinewton

Torque units:

lbFft – Pound-foot
lbFin – Pound-inch
ozFin – Ounce-inch
kgFm – Kilogram-meter
kgFmm – Kilogram-millimeter
gFcm – Gram-centimeter
Nm – Newton-meter
Ncm – Newton-centimeter
Nmm – Newton-millimeter
Note: not all sensor models display all the above units. Refer to the capacity /
resolution table for the respective sensor series for details.

7 Break Detection

On/Off

8 Mode

The letter “B” appears if the Break Detection function is enabled. Refer to the
Break Detection section for details.
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)
A – Average Mode
ET – External Trigger Mode
See Operating Modes section for details about each of these modes

9 Number of stored

data points

10 Battery / AC

adapter indicator

11 Automatic data

output indicator

The number of stored data points in memory, up to 5,000. Displayed only if
Memory Storage or Data Capture functions are used.
Either the AC adapter icon or battery power icon will be shown, depending on
power conditions. Refer to the Power section for details.
If Auto Output has been enabled under Serial / USB Settings, this indicator
is displayed. When automatic data output is occurring, the icon becomes
animated. See Communications section for details.

12 High / low limit

indicators

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

13 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
the home screen is displayed.

ZERO

Zeroes the primary reading and
peaks.

MENU

Enters the main menu.

Secondary

Label Secondary Function

ENTER

Various uses, as described in the
following sections.

(UP)
ESCAPE

Navigates up through the menu and
sub-menus.
Reverts one step backwards through
the menu hierarchy.

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Model 7i Digital Force / Torque Indicator User’s Guide

MODE
DATA

UNITS

4.3 Menu navigation basics

Most of the indicator’s various functions and parameters are configured through the main menu. To
access the menu press MENU. Use the

selection is denoted with clear text over a dark background. Press ENTER to select a menu item, then
use

item.
For parameters that may be either selected or deselected, press ENTER to toggle between selecting and

deselecting. An asterisk (*) to the left of the parameter label is used to indicate when the parameter has
been selected.

For parameters requiring the input of a numerical value, use the
decrement the value. Press and hold either key to auto-increment at a gradually increasing rate. When
the desired value has been reached, press ENTER to save the change and revert back to the sub-menu
item, or press ESCAPE to revert back to the sub-menu item without saving. Press ESCAPE to revert one
step back in the menu hierarchy until back into normal operating mode.

Refer to the following sections for details about setting up particular functions an d parameters.

Toggles between measurement
modes.
Stores a value to memory, transmits
the current reading to an external
device, and/or initiates automatic
data output, depending on setup.
Toggles between measurement
units.

Turns the LCD backlight on and off.

and keys to scroll through the items. The current

and again to scroll through the sub-menus. Press ENTER again to select the sub-menu

(DOWN)
DELETE

DIRECTION

N/A

Navigates down through the menu
and sub-menus.
Enables and disables Delete mode
while viewing stored data / shifts
cursor to the right for certain
functions.
Reverses the display during
calibration, and toggles between
measurement directions while
configuring set points and other menu
items.
N/A

and keys to increment or

5 DIGITAL FILTERS

Digital filters are provided to help smooth out the readings in situations where there is mechanical
interference in the work area or test sample. These filters utilize the moving average technique in which
consecutive readings are pushed through a buffer and the displayed reading i s the average of the buffer
contents. By varying the length of the buffer, a variable smoothing effect can be achieved. The selection
of 1 will disable the filter since the average of a single value is the value itself.

To access digital filter settings, select Filters from the menu. The display appears as follows:

DIGITAL FILTERS

(1 = Fastest)

Current Reading
1
Displayed Reading
1

Two filters are available:

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Model 7i Digital Force / Torque Indicator User’s Guide

Current Reading – Applies to the peak capture rate of the instrument.
Displayed Reading – Applies to the primary reading on the display.

Available settings: 1,2,4,8,16,32,64,128,256,512,1024,2048,4096,8192. It is recommended to keep the
current reading filter at its lowest value for best performance, and the displayed reading filter at its highest
value for best visual stability.

6 SET POINTS

6.1 General Information

Set points are useful for tolerance checking (pass/fail), triggering an external device such as a motorized
test stand, or alarm indication in process control applications. Two limits, high and low, are specified and
stored in the non-volatile memory of the instrument and the primary reading is compared to these limits.
The results of the comparisons are indicated through the three outputs provided on the 15-pi n connector,
thus providing “under”, “in range”, and “over” signaling. These outputs can be connected to indicato rs,
buzzers, or relays as required for the application.

6.2 Configuration

To configure set points, select Set Points from the menu. The screen appears as follows:

SET POINTS
Upper Disabled
* Upper Enabled

5.000 lbFin
Lower Disabled
* Lower Enabled

3.500 lbFin

Either one, two, or none of the set points may be enabled. To toggle between measurement directions,
press the DIRECTION key.

If two set points have been enabled, they are displayed in the upper left corner of the display. If only one
set point has been enabled, the word “OFF” appears in place of the value. If no set points have been
enabled, the upper left corner of the display will be blank.

When set points are enabled, the following indicators are shown to the left of the primary reading:

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Model 7i Digital Force / Torque Indicator User’s Guide

– the displayed value is greater than the upper

set point (NO GO HIGH)

– the displayed value is between the set points

(GO)

– the displayed value is less than the lower set

point (NO GO LOW)

Note: Set point indicators and outputs reference the displayed reading, not necessarily the current live
load.

6.3 Set Point Outputs Schematic Diagram

6.4 Using Set Points to Control a Mark-10 Motorized Test Stand

When using set points to stop/cycle Mark-10 motorized test stands, the upper a nd lower set points must
be set to opposite measuring directions. Both set points must be set, even if the intended application is
to stop/cycle at only one of the set points. The opposite set point should be a value sufficiently large that it
does not get triggered during the course of the test.

For certain Mark-10 test stands, the upper and lower set point directions are reversed.

7 BREAK DETECTION

The break detection function identifies when a sample has broken, clicked, slipped, or otherwise reached
a peak load and then fell by a specified percentage drop. Upon detection of the break, the indicator can
perform several automatic functions, depending on the mode in which break detection is enabled, as
follows:

1. Transmit the peak reading (Auto Output).

2. Save the peak value to memory (Auto Storage).

3. Zero the primary and peak readings (Auto Zero).

4. Toggle a pin (for example, to stop crosshead movement on a Mark-10 motorized test stand).

Break detection functions and settings are configured from a central location, and apply to any mode in
which it is enabled. Refer to the Operating Modes section for details on configuring each mode.

7.1 Configuration

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Model 7i Digital Force / Torque Indicator User’s Guide

To enable Break Detection and configure the automatic functions, select Break Detection from the main
menu. The display appears as follows:

BREAK DETECTION
* Disabled

Enabled-End Test

Enabled-Abort
+ Break Settings
+ Auto Output
+ More

Select “+ More” for additional options:

BREAK DETECTION 2

* Auto Storage
* Auto Zero
Auto Zero Delay
3 sec.

Any combination of the above functions may be selected.

Function Description

Arms the break detection function. When enabled, the letter “B” appears on the

Enabled-End Test

home screen, between the Mode and Unit indicators. Refer to the Home Screen
and Controls section for details. Applies to modes in which a Break Detect Stop
Condition is specified.

Enabled-Abort
Break Settings

Auto Output
Auto Storage
Auto Zero

Same as above, except applies to situations in which a premature break occurs
before the specified Stop Condition is reached.

Refer to the following sub-sections for details.
Automatically stores the peak reading to memory.

Automatically zeroes the display following data transmission and/or storage.

If tones are enabled, a tone will sound when the output, storage, and zero functions have occurred.

7.2 Break Settings

Select Break Settings from the main menu to configure the settings. The display appears as follows:

BREAK DETECTION

SETTINGS

Threshold: 5 %
% Drop: 50 %

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