Mark-10 7i User manual

Model 7i
DIGITAL FORCE / TORQUE INDICATOR
User’s Guide

Model 7i Digital Force / Torque Indicator User’s Guide
1
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...............................................................4
SETUP ................................................................5
HOME SCREEN AND CONTROLS ...................7
DIGITAL FILTERS..............................................9
SET POINTS.....................................................10
BREAK DETECTION........................................11
OPERATING MODES.......................................13
DATA MEMORY AND STATISTICS ................21
FOOTSWITCH ..................................................23
COEFFICIENT OF FRICTION ..........................24
CUSTOM UNIT .................................................24
COMMUNICATIONS AND OUTPUTS .............25
CALIBRATION .................................................31
PASSWORDS...................................................35
OTHER SETTINGS...........................................37
SPECIFICATIONS ............................................39

Model 7i Digital Force / Torque Indicator User’s Guide
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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, MESUR
TM
Lite software,
MESURTMgauge DEMO software, User’s Guide)
1.2 General Overview
The 7i is a universal indicator designed for displaying
measurements from interchangeable Mark-10 Plug &
TestTM 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 & TestTM 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 & TestTM connector. The model
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:
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

Model 7i Digital Force / Torque Indicator User’s Guide
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Example 1
Model MR01-100 sensor with Model 7i Indicator
MR01-100
±0.15% of full scale + 7i ±0.1% of full scale = Total ±0.25% 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 + 3i ±0.2% of full scale = Total ±0.55% 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.

Model 7i Digital Force / Torque Indicator User’s Guide
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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 when
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.
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 backlight is turned on or
Serial connecto
r
USB connector
Power input jack

Model 7i Digital Force / Torque Indicator User’s Guide
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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 & TestTM connector must be inserted into the receptacle of the 7i, 5i, or 3i indicator with the side
marked “Plug & TestTM Technology” facing up (see Fig. 3.1). When fully inserted, the connector will lock
into place with a “click”.
Fig. 3.1
Appropriate orientation of Plug & TestTM connector. Sensor model
number, serial number, and load capacity may be found on the
labels affixed to the 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
& TestTM connector.
3.2 Sensor connector orientation
In order to accommodate a variety of testing requirements, the orientation of the Plug & TestTM 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

Model 7i Digital Force / Torque Indicator User’s Guide
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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.
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.
Sensor connector
oriented up
Sensor connector
oriented down

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4 HOME SCREEN AND CONTROLS
4.1 Home Screen
No. Name Description
1 Measurement
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.
2 Compression /
Clockwise peak
The maximum measured compression or clockwise value. This value may be
reset by pressing ZERO or by powering the indicator off and on.
3 Tension /
Clockwise peak /
Static COF
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.
4 Primary reading /
Kinetic COF
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
5 Load bar 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.
6 Units The current measurement unit. Abbreviations are as follows:
Force units:
lbF – Pound-force
ozF – Ounce-force
kgF – Kilogram-force
gF – Gram-force
1
2
3
4
689
10
11
12
13
5
7

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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
The letter “B” appears if the Break Detection function is enabled. Refer to the
Break Detection section for details.
8 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)
A – Average Mode
ET – External Trigger Mode
See Operating Modes section for details about each of these modes
9 Number of stored
data points
The number of stored data points in memory, up to 5,000. Displayed only if
Memory Storage or Data Capture functions are used.
10 Battery / AC
adapter indicator
Either the AC adapter icon or battery power icon will be shown, depending on
power conditions. Refer to the Power section for details.
11 Automatic data
output indicator
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
Secondary
Label Secondary 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.
ENTER Various uses, as described in the
following sections.
ZERO Zeroes the primary reading and
peaks.
(UP)
Navigates up through the menu and
sub-menus.
MENU Enters the main menu. ESCAPE Reverts one step backwards through
the menu hierarchy.

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MODE Toggles between measurement
modes.
(DOWN)
Navigates down through the menu
and sub-menus.
DATA Stores a value to memory, transmits
the current reading to an external
device, and/or initiates automatic
data output, depending on setup.
DELETE
Enables and disables Delete mode
while viewing stored data / shifts
cursor to the right for certain
functions.
UNITS Toggles between measurement
units.
DIRECTION Reverses the display during
calibration, and toggles between
measurement directions while
configuring set points and other menu
items.
Turns the LCD backlight on and off. N/A N/A
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 and keys to scroll through the items. The current
selection is denoted with clear text over a dark background. Press ENTER to select a menu item, then
use and again to scroll through the sub-menus. Press ENTER again to select the sub-menu
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 and keys to increment or
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 and parameters.
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 is 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:
Two filters are available:
DIGITAL FILTERS
(1 = Fastest)
Current Reading
1
Displayed Reading
1