OMEGA DFG207 Digital Force Gauge User Guide
- June 5, 2024
- Omega
Table of Contents
User’s Guide
DFG207
Digital Force Gauge
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info@omega.com
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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.
Introduction
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 the 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 a serious accident if the device is operated incorrectly. Proper usage of the device is described in the manual.
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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.
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In destructive testing, protective masks and gloves should be worn to prevent the occurrence of damage to the human body because of material splashing during testing.
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Do not use fixtures that 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).
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Do not test force exceeding the maximum range of the gauge. Otherwise, it may cause damage to the sensor or even an accident.
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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.
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When using the power adapter, the voltage of the power supply should be the same as the rated voltage, or it may cause electric shock or fire
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Do not pull out or insert the plug with wet hands, or it may lead to electric shock.
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Don’t pull the cable of the power adapter to pull the plug, to avoid wire breaking and electric shocks.
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Please use a soft cloth to clean the gauge. Soak the cloth in the water with the 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.). -
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 a permanent fault of the gauge.
Power
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, and 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 a 6V DC power supply.
Hardware 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.
Home Screen & Controls
4.1 Overall Structure
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.
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.
4-6 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 the battery
power supply.
4.2 Display
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.
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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 ‘
’.
4.3 Operation Key
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.
Operating 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.
Calibration
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.
Data 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.
Specifications
| Accuracy | ± 0.2% FS ± 1Digit |
|---|---|
| Unit | kgf, gf, N, Lbf |
| Measurement | Peak Value Measurement, Real Time Measurement |
| Display | 2 Reversible 4 Digit LCD Displays |
| Power Off | 10 Minutes Auto Power Off, Manual Power Off |
| Backlight | Blue Backlight |
| Safe Load | 150%FS (Buzzer Alarm Over 110% FS) |
| Power Supply | 2x AA Battery or 6V DC Power Supply |
| Operating Conditions | Temperature: 0-40°C (0-104°F) Humidity: <80% |
| Surrounding | No Vibration Source |
| Weight | 390g |
| Size | 211x80x36mm (8.3×3.15×1.42in) |
8.1 Accessories
| Carrying Case
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Manual
Pulling Hook
Flat Tip
Cone Tip
V-shaped Groove Tip
V-shaped Wedge Tip
Lengthening Screw Rod
Connection Rod Cap
Nut
8.2 Specification and Application of Accessories
| Accessory | Structure Diagram | Applications |
|---|---|---|
| Pulling Hook | To hang tested objects when testing pulling force. | |
| Flat Tip | To test thrust of flat surface or convex surface. | |
| Cone Tip | To test thrust of a flat surface, concave surface or circular |
hole.
V-shaped Groove Tip| | To test the thrust of the cylindrical surface or the
edge of the perpendicular plance.
V-shaped Wedge Tip| | To test thrust of flat surface or groove surface.
Lengthening Connection Rod| | It is used in situation when the measurement tip
is not long enough.
omega.com info@omega.com
Servicing North America:
U.S.A.
Headquarters:
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)
Tel: 203-359-1660
e-mail: info@omega.com
Fax: 203-359-7700
Servicing UK:
Omega Engineering, Limited
One Omega Drive, Northbank Irlam, Manchester M44 5BD
Servicing DE:
Omega Engineering, GmbH
Daimlerstrasse 26, Deckenpfronn,
Germany 75392
References
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