Omega HHTQ35 User manual

HHTQ35
Digital Torque Gauges

HHTQ35 Digital Torque Gauges User’s Guide
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HHTQ35 Digital Torque Gauges User’s Guide
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Thank you…
Thank you for purchasing an Omega HHTQ35 digital torque gauge,
designed for handheld or test stand use.
With proper usage, we are confident that you will get many years of
great service with this product. Omega 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 HHTQ35 digital torque
gauge should be fully trained in appropriate operation and
safety procedures.
TABLE OF CONTENTS
OVERVIEW.........................................................3
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 .................................................14
OTHER SETTINGS...........................................18
SPECIFICATIONS............................................20

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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 gauge)
1 - Certificate of calibration
1 09-1165 USB cable
1 - Resource CD (USB driver, user’s guide)
1.2 Safety / Proper Usage
Caution!
Note the torque gauge’s capacity before use and ensure that the capacity is not exceeded.
Producing a torque greater than 150% of the gauge’s capacity can damage the internal sensor. An
overload can occur whether the gauge is powered on or off.
Typical materials able to be tested include many manufactured items, such as springs, electronic
components, fasteners, caps, mechanical assemblies, and many others. Items that should not be used
with the gauge 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.
The following safety checks and procedures should be performed before and during operation:
1. Never operate the gauge if there is any visible damage to the AC adapter or the gauge itself.
2. Ensure that the gauge is kept away from water or any other electrically conductive liquids at all
times.
3. The gauge should be serviced by a trained technician only. AC power must be disconnected and
the gauge must be powered off before the housing is opened.
4. 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.
5. Wear eye and face protection when testing, especially when testing brittle samples that have the
potential to shatter under force. Be aware of the dangers posed by potential energy that can
accumulate in the sample during testing. Extra bodily protection should be worn if a destructive
failure of a test sample is possible.
6. In certain applications, such as the testing of brittle samples that can shatter, or other applications
that could lead to a hazardous situation, it is strongly recommended that a machine guarding
system be employed to protect the operator and others in the vicinity from shards or debris.
7. When the gauge is not in use, ensure that the power is turned off.

HHTQ35 Digital Torque Gauges User’s Guide
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2 POWER
The HHTQ35 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 gauge (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
off), a message will appear, “BATTERY VOLTAGE TOO LOW. POWERING OFF”. A 4-tone
audio indicator will sound and the gauge will power off.
The gauge 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.
USB connector
Power input jack

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3 MECHANICAL SETUP
Fig. 3.1
Proper axial loading of HHTQ35 torque gauge.
3.1 Proper alignment
Load must be applied axially with respect to the sensor, as shown in Figure 3.1. If attachments are used,
ensure that the sample is acted upon axially with respect to the instrument. Side loading or off-center
loading can damage the instrument, whether power is turned on or off.
3.2 Mounting to a plate
The indicator portion of the gauge can be mounted to a plate with four thumb screws fastened into the
appropriate holes in the rear half of the housing.
The torque sensor portion of the gauge (shown in Figure 3.1) can be mounted to a stand, as required for
the application. Flat surfaces are provided to prevent rotation within a fixture.
Refer to the Dimensions section for detailed information.

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4 HOME SCREEN AND CONTROLS
4.1 Home Screen
No. Name Description
1 Measurement
direction
indicator
– indicates clockwise direction
– indicates counter-clockwise direction
These indicators are used throughout the display and menu.
2 Peaks The maximum measured clockwise and counter-clockwise readings. These
readings are reset by pressing ZERO or by powering the gauge off and on.
3 Primary reading
The current displayed load reading. See Operating Modes section for
details.
4 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 clockwise load, increasing to the left indicates
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.
5 Units The current measurement unit. Abbreviations are as follows:
lbFin – Pound-inch
ozFin – Ounce-inch
kgFmm – Kilogram-millimeter
Ncm – Newton-centimeter
Note: not all sensor models display all the above units. Refer to the capacity /
resolution table for details.
6 Mode The current measurement mode. Abbreviations are as follows:
RT – Real Time
PCW – Peak Clockwise
PCCW – Peak Counter-clockwise
See Operating Modes section for details about each of these modes
7 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.
1
2
4
56
7
8
9
3

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8 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
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
Secondary
Label Secondary Function
Powers the gauge 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.
MODE Toggles between measurement
modes.
(DOWN) Navigates down through the menu
and sub-menus.
DATA Transmits the current reading to an
external device via the USB port. DIRECTION Toggles between 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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4.3 Menu navigation basics
Most of the gauge’s various functions and parameters are configured through the main menu. To access
the menu press MENU. Use the UP and DOWN 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 UP and
DOWN 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 UP and DOWN 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 OPERATING MODES
Caution!
In any operating mode, if the capacity of the instrument has been exceeded by more than 110%,
the display will show “OVER” to indicate an overload. A continuous audible tone will be sounded
(if beeps are enabled) until the MENU key has been pressed or the load has been reduced to a
safe level.
Three operating modes are possible with the HHTQ35 torque gauge. To cycle between the modes, press
MODE while in the home screen.
5.1 Real time (RT)
The primary reading corresponds to the live measured reading.
5.2 Peak Clockwise (PCW)
The primary reading corresponds to the peak clockwise reading observed. If the actual load decreases
from the peak value, the peak will still be retained in the primary reading area of the display. Pressing
ZERO will reset the value.
5.3 Peak Counter-clockwise (PCCW)
Same as above, but for counter-clockwise readings.

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6 CHANGING THE UNITS
The HHTQ35 can display three different measurement units, depending on the model. To change the
unit, select Units from the menu. The display will list the available units, for example:
The gauge will always power on with the unit selected.
7 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 will appear as follows:
Two filters are available:
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. 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
stability.
8 SET POINT INDICATORS
8.1 General Information
Set points are useful for tolerance checking (pass/fail). 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.
8.2 Configuration
To configure set points, select Set Points from the menu. The screen will appear as follows:
UNITS
* lbFin
kgFmm
Ncm
DIGITAL FILTERS
(1 = Fastest)
Current Reading
8
Displayed Reading
1024