Instantel Blastmate III Operator'S Manual Download

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Chapter 3

3–16

BlastMate III Operator Manual

without the microphone turned on. To choose a setting, display it on the BlastMate III display
then press the

Enter

key.

f. Microphone Type

(Compliance Module Only)

Two types of microphones may be connected to the BlastMate III: Linear “L” and “A” Weight.
The BlastMate III must be configured to the microphone type being used to ensure the proper
measurement units and data analysis techniques are used during recording. This setting tells the
BlastMate III which microphone you are using. To check the type of your microphone, read the
label on the side of the microphone. All Instantel microphones have a model number.

Lin Mic

identifies a linear microphone.

A Mic

identifies an “A” Weight microphone.

To select a microphone type, press the Setups

Special

key when the Main Window is displayed.

Press the

Enter

key repeatedly to scroll through the windows until the Microphone Type Window

appears. Press the

Down

key to display the two microphone types, Linear or “A” Weight.

To choose a setting, display it on the BlastMate III display and press the

Enter

key. On eight

channel monitors, set the microphone type for the second microphone, Mic2.

g. Microphone Units

(Compliance Module Only)

The measurement units used on the microphone channel depend on the microphone type and
measurement system being used. For Linear “L” microphones, you have the choice between psi
(L), dB (L), or pa. (L). For “A” weight microphones, units are dB (A) only. For this reason, when
you chose the “A” Weight microphone type, this window does not appear on the BlastMate III
display.

To choose a microphone measurement unit, press the Setups

Special

key when the Main Window

is displayed. Press the

Enter

key repeatedly to scroll through the windows until the Microphone

Units: Window appears. Press the

Down Arrow

key to display the three microphone unit

choices. Press the

Enter

key to select a measurement unit when it appears on the display.

h. Geophone Type

(Compliance Module Only)

Two types of geophone may be connected to the BlastMate: a Standard Geophone or a 4.5 Hz
Geophone.

To select a geophone type, press the

Right Arrow

key and the

Setups

key together. Press the

Enter

key to scroll the windows until the Geophone Type Window appears. Press the

Right

Arrow

key to display the two microphone types, Standard or 4.5 Hz. To choose a setting, display

it on the BlastMate III display and press the

Enter

key.

Note that for the 4.5 Hz Geophone, the unit will perform a continuity test when Sensorcheck is
run instead of the standard Sensorcheck test.

i. Geo Alarm Level

(Compliance Module Only)

The Geo Alarm Level controls the triggering of an optional remote alarm (711A1401). On eight
channel monitors, the geo alarm level operates on channels one to four only.

The remote alarm sounds two alarms: warning and alarm. The warning alarm sounds when event
activity exceeds the geophone trigger level. The geophone alarm level can be set to a higher level
than the geophone trigger level. This allows for the triggering of a second alarm at the higher
level.

For example, in pile driving operations the remote alarm triggers a warning when activity exceeds
the trigger level for the geophone, notifying the operator that the pile driving activity has
exceeded that set level. The second alarm triggers when activity exceeds the geophone alarm
level, set to a higher level, notifying the operator that operations should cease immediately.