Omega DFG207 User manual

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TM
User’s Guide
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DFG207
Digital Force Gauge

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omega.com [e-mail]
Servicing North America:
Omega Engineering, Inc.
800 Connecticut Ave. Suite 5N01, Norwalk, CT 06854
Toll-Free: 1-800-826-6342 (USA & Canada only)
Customer Service: 1-800-622-2378 (USA & Canada only)
Engineering Service: 1-800-872-9436 (USA & Canada only)
U.S.A.
Headquarters
:
Tel: [phone]
e-mail: [e-mail]
Fax: [phone]
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains and reserves
the right to alter specifications without notice.
Servicing UK:
Omega Engineering, Limited
One Omega Drive, Northbank
Irlam, Manchester M44 5BD
Servicing DE:
Omega Engineering, GmbH
Daimlerstrasse 26, Deckenpfronn,
Germany 75392

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Table of Contents
Table of Contents............................................................................................................................................... 3
1Introduction................................................................................................................................................ 4
1.1 Safety/Proper Usage ........................................................................................................................................4
2Power ......................................................................................................................................................... 5
2.1 Power On & Off................................................................................................................................................5
2.2 Battery Replacement........................................................................................................................................5
3Hardware Setup.......................................................................................................................................... 6
3.1 Installation & Measurement.............................................................................................................................6
4Home Screen & Controls ............................................................................................................................. 7
4.1 Overall Structure..............................................................................................................................................7
4.2 Display.............................................................................................................................................................8
4.3 Operation Key..................................................................................................................................................9
5Operating Modes ...................................................................................................................................... 10
5.1 Real-Time Measurement Mode & Peak Hold Mode.........................................................................................10
5.2 Unit Conversion Function ...............................................................................................................................10
5.3 Setting of Auto Power Off...............................................................................................................................10
6Calibration................................................................................................................................................ 10
7Data Memory & Statistics ......................................................................................................................... 10
7.1 Data Memory.................................................................................................................................................10
7.2 Data Scanning ................................................................................................................................................10
7.3 Data Deleting.................................................................................................................................................10
8Specifications............................................................................................................................................ 11
8.1 Accessories ....................................................................................................................................................11
8.2 Specification and Application of Accessories ...................................................................................................12

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1Introduction
Thank you for purchasing an Omega Model DFG207 digital force gauge; designed for push force and pull force testing in
numerous applications across virtually every industry.
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 Model DFG207 should be fully trained in appropriate operation and safety
procedures.
1.1 Safety/Proper Usage
Caution: Please read this manual carefully before measurement, keep it properly after reading, in
preparation to read again.
•It is possible to damage the gauge or cause serious accident if the device is operated incorrectly. Proper usage
of the device is described in the manual.
•If the device is being used to test impact load, select a model with a safe load range of at least double the
impact load.
•In destructive testing, protective masks and gloves should be worn to prevent the occurrence of the damage
to the human body because of material splashing during testing.
•Do not use fixtures which have been damaged or severely bent. For users, please refer to the relevant
specifications in this manual when using a self-made fixture (various types of fixtures are provided for
customers to select according to need).
•Do not test force exceeding the maximum range of the gauge. Otherwise, it may cause damage to the sensor,
or even an accident.
•When the tested force exceeds 110% of the range, a continuous buzzer alarm will activate. In this case, please
remove the load quickly, or reduce the load.
•When using the power adapter, the voltage of power supply should be the same as the rated voltage, or it
may cause electric shock or fire
•Do not pull out or insert the plug with wet hands, or it may lead to electric shock.
•Don't pull the cable of the power adapter to pull the plug, to avoid wire broken and electric shocks.
•Please use a soft cloth to clean the gauge. Soak the cloth in the water with cleaning agent, wring it out, and
then use it to remove the dust and dirt.
Note: Do not use volatile chemicals to clean the gauge (such as volatile agents, thinner, alcohol, etc.).

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•Do not use the gauge in the following environment:
- Wet environment
- Dusty environment
- Next to an environment with chemicals or oils
- Next to a vibration source
•After use, please put the force gauge into the portable box to protect the testing shaft from damage.
•Do not disassemble or repair the machine by yourself, which may cause permanent fault of the gauge.
2Power
2.1 Power On & Off
Power On
Install the batteries correctly or plug in the DC power supply. Then press the Power/Exit Key (POWER/EXIT) to power on
the gauge.
Power Off
Manual Power Off
In the state of power-on, press and hold the Power/Exit Key (POWER/EXIT) for about 2 seconds, the indicator ‘OFF’
appears. Then release the key and the gauge will be powered off.
Auto Power Off
The Auto power off function can be activated by the user. When it is activated, the gauge will be powered off
automatically after 10 minutes with no key operation. For details, please refer to Section 5.5 Setting Auto Power Off.
2.2 Battery Replacement
When it is necessary to replace the battery, the battery symbol will appear on the device display. Follow the
instructions below to replace the battery:
Step 1: Slide the Battery Cover away from the gauge and remove the batteries.
Step 2: Install new batteries correctly into the case.
Step 3: If the gauge is not to be used for any extended period, remove the batteries.
*Power can be supplied by either alkaline batteries or 6V DC power supply.

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3Hardware Setup
3.1 Installation & Measurement
Once the gauge is powered on, press the operation keys to select the intended measurement mode according to the
use case, or measure directly with the factory default settings.
Step 1: Select the appropriate test fixtures to install on the force gauge (to use self-made fixtures, please refer to the
relevant data on the next page).
Step 2: When measuring, hold the force gauge firmly or install it on a suitable test machine. Apply the
force and the sensing rod in a straight line, so that measurements of load are accurate.
Step 3: After measuring, remove the load, turn off the gauge, remove the fixtures, and then put the items back in
the toolbox after cleaning, to prepare for the next use.
Figure 1: The Correct Measurement Direction

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4Home Screen & Controls
4.1 Overall Structure
Figure 2: DFG207 Unit Structural Diagram
Function Description of Overall Structure
4-1 Sensing Screw
The screw is the main force-sensing structure component of the whole instrument. The
function of the screw is to conduct the outer applied force into the gauge. It can be
connected to accessories such as the pull hook, the flat measurement head, the conical
measurement head, the V shape groove measurement head, the V shape wedge
measurement head, the lengthening connection rod, etc. For details of accessories, see Page
12.
4-2 Display A
Display A is used to display the readings of measurement, units of measurement, the
indications of the operation, etc.
4-3 Operation Key Area
All operation keys are distributed on this area. Thus, all keys of the gauge can be found here.

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4-4 Display B
Display B is used to display the readings of measurement, units of measurement, the
indications of the operation, etc. It is designed for more convenient reading on multiple
directions.
4-5 USB Cable Interface
The interface accepts a USB data cable for data collection.
4-6 Fixing Screw
The fixing screw allows the gauge sensor to be connected to external components.
4-7 Power Interface
The power interface accepts a 6 V DC power supply.
4-8 Screw Holes
Device casing screw holes.
4-9 Rear Battery Case
The location of the battery compartment for battery power supply.
4.2 Display
Figure 3: Unit Display Diagram
Function Description of Display
4-10 Battery Indicator
When the battery voltage is low, the battery icon ‘’ appears on the top left corner
of the display, indicating lack of voltage and the batteries need to be replaced.
4-11 Displayed Reading
For this gauge, the pushing force is a positive value (not shown "+"); the pulling force is a
negative value (display "-").
4-12 Peak Value Indicator MAX
When the indicator ‘MAX.’ appears, it indicates that the device is in Peak Value Hold
Mode, in which the displayed reading is the peak value during measurement. When the
indicator ‘MAX.’ does not appear, it indicates that it is in Real-Time Measurement Mode,
in which the displayed reading changes according to the applied load.
4-13 Memory Indicator SV
When ‘SV’ appears, it indicates that it is in measurement mode, in which the displayed
reading can be memorized into the gauge.
4-14 Scanning Indicator RD
When ‘RD’ appears, it indicates the device is in Data Scanning Mode, in which the
displayed value is one of the data stored in the device memory.
4-15 Measurement Unit
It indicates the current measurement unit, which includes ‘kgf’, ‘gf’, ‘N’, ‘lbf’.
4-16 Amount of Data in
Memory / Serial Number of
Data
In the Measurement Mode, the device indicates the amount of data in memory, for
example ‘ While in the Scanning Mode, it indicates ‘Serial Number Of Data / Amount
Of Data In Memory’, for example ‘ ’.

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4.3 Operation Key
Figure 4: Unit Operation Key Diagram
Function Description of Operation Key
4-17 Unit Conversion Key (UNIT)
The key for unit conversion.
4-18 Delete Key (DEL)
The key for deleting the memorized data.
4-19 Power/Exit Key (POWER/EXIT)
The key for powering on/off the gauge. It is also the key for exiting from Data
Scanning Mode. Additionally, it is the key for going into the Auto Power Off
Settings.
4-20 Read/Downward Key (READ/▼)
The key for entering Data Scanning Mode, for transferring data from the gauge to
the computer, for downward scanning in Data Scanning Mode, and for time
conversion in Power Off Setting Mode.
4-21 Save/Upward Key (SAVE/▲)
The key for memorizing data, for upward scanning in Data Scanning Mode, and
for time conversion in Power Off Setting Mode.
4-22 Peak Value Key (PEAK)
The key for conversion between the Peak Value Hold Mode and the Real-Time
Measurement Mode.
4-23 Zero Key (ZERO)
The key for zero calibration of the gauge.

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5Operating Modes
5.1 Real-Time Measurement Mode & Peak Hold Mode
Two kinds of measurement modes can be set for this gauge, the Real-Time Measurement Mode and the Peak Hold
Mode. When there is no peak indicator "MAX" on the display, it is in the Real-Time Measurement Mode. The displayed
test value changes according to the load.
Press the Peak Value Key (PEAK) and the peak indicator "MAX" will appear on the display. This indicates the device is in
Peak Hold Mode. The displayed test value is the maximum value during the measurement.
5.2 Unit Conversion Function
In either Real-Time Measurement Mode or Peak Hold Measurement Mode, press the Unit Key (UNIT) for measurement
unit conversions.
5.3 Setting of Auto Power Off
When the gauge is powered on, press and hold the Power/Exit Key (POWER/EXIT) for about 3 seconds. Release the key
when the indicator (AUTO) appears on the display indicating auto power off in 10 minutes with no key operations and
non-auto power off. Press the Save/Upward Key (SAVE/▲) or the Read/Downward Key (READ/▼) to convert between
these two settings. Press the Power/Exit Key (POWER/EXIT) to quit.
6Calibration
Install the gauge at the position of measurement according to the requirements. Then press the Zero Key (ZERO) to
calibrate the gauge, a value of zero will appear on the display.
* When the weight of the used fixture is more than 20% of the range, or the load of the gauge is more than 20% of the
range, the gauge is not able to be calibrated. In this case, it is necessary to use a lighter fixture or remove the load, then
calibrate afterward.
7Data Memory & Statistics
7.1 Data Memory
When the gauge is in measurement mode, the memory indicator ‘SV’ will appear on the display. Press the Save/Upward
Key (SAVE/▲), the displayed data will be memorized in the gauge, the amount of data in memory plus one. The gauge
can store up to 99 sets of measured data.
7.2 Data Scanning
After a certain amount of data are memorized in the gauge, press Read / Downward Key (READ/▼) to enter the Data
Scanning Mode. The memory indicator ‘SV’ will disappear and the Scanning Indicator ‘RD’ will appear on the display.
Also, the present memorized data and the ‘Serial Number Of Present Data / Amount Of Data In Memory’, such as ‘ ’, will
appear on the display. Press the Save/Upward Key (SAVE/▲) or Read/Downward Key (READ/▼) for data switching. To
exit the Data Scanning Mode, just press the Power/Exit Key (POWER/EXIT).
7.3 Data Deleting
In the Data Scanning Mode, press the Delete Key (DEL) to delete the present data. In measurement modes, press and
hold the Delete Key (DEL) for about 3 seconds, all of the memorized data will be deleted.