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TSD121C HAND DYNAMOMETER
The multi-purpose hand dynamometer adds a new dimension to force measurements. This fully isometric transducer
can be used in the traditional hand grip strength fashion, pulled apart by both hands (the Dynagrips option), or
mounted against a wall and pulled. The hand dynamometer can be used in isolation, or combined with EMG
recordings for in-depth studies of muscular activity. The isometric design improves experiment repeatability and
accuracy. The hand dynamometer is designed to interface with the DA100C General Purpose Transducer Amplifier,
and the TEL100C remote monitoring module. The hand dynamometer transducer is the same for each system, but
they each use a different connector and a different part number. The equipment section provides you with a list of
the appropriate part numbers and interfaces.
TSD121C Calibration
With the proper equipment and correct scaling techniques described below, precise force measurements can be
obtained.
Equipment
TSD121C Hand Dynamometer
MP System and DA100C General Purpose Transduce Amplifier
SS25 Simple Sensor Hand Dynamometer
MP System and TEL100C Remote Monitoring Module Set
Hardware Setup
Connect the TSD121C to the DA100C, or the SS25 to the TEL100C. When using this type of transducer, proper
hand placement is at the uppermost portion of the foam grip, directly below the dynagrip connections.
Software Setup
1. Select Setup Channels under the MP menu
and enable one analog channel; make sure to
correlate this with the Analog Output
Channel you selected on the DA100C
module.
2. Select Scaling. A dialog similar to the one
shown here will be generated.
3. In the Map value column, enter the scaling
factors of 0 and 1, respectively. These
represent 0 and 1 kilograms.
4. Enter “Kg” for the Units label, as shown.
5. Take the TSD121C and rest it on the table.
6. Click on the Cal 1 button with the mouse to get a calibration reading.
To obtain a value for the Cal 2 box, add 13.15μV per volt of excitation to the value from the Cal 1 box. Currently,
the DA100C is factory set to 2 V (±1 V) of excitation. If you have set your amplifier to another level of excitation,
use the following equation wherein V = volts of excitation per 1 kg and G = gain setting on the DA100C or
TEL100C module:
(13.15μV*G * V) + Cal 1 = Cal 2
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