
5TISSUE PULLER - MODEL 560TP - USER MANUAL
CHAPTER 2 CLEANING AND MAINTENANCE
The Tissue Puller is a very delicate and sophisticated piece of research equipment. DMT recommends that the following sections
are read carefully and that the instructions are followed at all times.
2.1 Cleaning the Tissue Puller
2.2 Maintenance of the force transducer
Force transducer: The force transducer is the most delicate and fragile component of the 560TP. Extreme care must be used
when handling or touching the force transducer. As part of daily maintenance, inspect the grease around the transducer pin ex-
tending from the transducer compartment pinhole before starting any experiment. Insufcient grease in this area will allow buffer
and water to enter the transducer compartment and cause irreparable damage to the force transducer.
IMPORTANT NOTES
DMT RECOMMENDS THAT THE HIGH VACUUM GREASE SEALING THE TRANSDUCER PINHOLE IS CHECKED AND REPLACED
AT LEAST ONCE A WEEK, ESPECIALLY IF THE MYOGRAPH IS USED FREQUENTLY
DMT TAKES NO RESPONSIBILITY FOR THE USE OF ANY OTHER KIND OF GREASE OTHER THAN THE GREASE SUPPLIED BY
DMT FOR THIS PURPOSE
DMT TAKES NO RESPONSIBILITY FOR ANY KIND OF DAMAGE CAUSED BY MISHANDLING OF THE FORCE TRANSDUCERS
2.2.1 Checking the force transducer
The 560TP force transducer is a strain gauge connected to a Wheatstone bridge. The force transducer is housed in a separate,
protective compartment (see gure 4.1 below). While the protective cover offers some mechanical protection for the force trans-
ducers, it is still very vulnerable to applied forces exceeding 1 Newton (100 grams) or uid running into the transducer compart-
ment due to inadequate greasing of the transducer pinhole (see chapter 4.3 Maintenance). If the force readings in MyoPULL ap-
pear unstable or noisy, then perform a new calibration of the force transducer as described in chapter 2.3.2 - Weight Calibration
of force transducer. During the calibration monitor the relative force reading values in the FORCE CALIBRATION sub-menu in the
MyoPULL Software. The normal operating values for the force transducer during calibration should be between 3000 and 3500.
• If the value is 0, a single digit, or a three digit number, the force transducer is broken and needs to be replaced.
• If the value is less than 2000 or greater than 4500, the force transducer is broken and needs to be replaced.
In addition, if the force reading cannot be reset to zero AND the transducer cannot be recalibrated, the force transducer is broken
and needs to be replaced. If any other problems related to the force transducer are encountered, please contact DMT for advice
or further instructions.
2.2.2 Force Transducer Replacement
If the force transducer breaks and needs to be replaced the 560TP need to be shipped back to DMT for replacement. The ship-
ping address is:
Danish Myo Technology A/S
Skejby Science Center
Skejbyparken 152
DK-8200 Aarhus N.
Denmark
Tel: +45 8741 1100
Please contact your Sales Representative and request a Return to Manufacturer Authorisation (RMA) Number to attach to your
shipping documentation.
CHAPTER 2