Reference
BlastMate III Operator Manual
5–1
5. R
EFERENCE
This chapter discusses wall and ceiling installation procedures, and the theory of operation for
Instantel’s standard transducer, microphone, Sensorcheck, anti-alias filter, and data analysis
techniques.
5.1. Additional Installation Procedures
The following sections outline procedures to install the standard transducer on walls and ceilings.
5.1.1. Wall Installation
The standard transducer may be installed on a wall alone or with the optional leveling plate where
leveling is required. In both cases, bolts install the standard transducer to a wall. Before installing
the standard transducer, you must switch the position of the vertical and transverse geophones.
This positions the geophones to their natural axes compensating for the vertical wall installation.
This is a simple procedure requiring no special tools.
To switch the vertical and transverse geophones, remove the three screws on the top cover. Insert
a screwdriver into the slot on the side of the standard transducer and pry off the top cover.
Remove the two screws securing the electronics to expose two geophones. Switch the vertical and
the transverse geophones. Replace the electronics. Replace the top cover while maintaining the
gasket’s position. Align the cover with the screw holes and the center hole. Insert the three screws
and tighten until the cover, gasket, and housing press together. Finally, tighten the three screws in
a clockwise sequence to assure proper gasket seating. Tighten each screw to 10 lbf/in. (1.2 N.m)
torque. A proper seal occurs when the gasket begins to bulge out slightly from the transducer
cover and housing.
WARNING:
Do not over-tighten the lid or the installation bolt. Over-tightening the lid may
damage the gasket and break the seal, strip the screw hole threads, or cause
Sensorcheck failure.
Summary of Contents for Blastmate III
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