Compliance Module
BlastMate III Operator Manual
3–7
You can view previously recorded events while the monitor is in the monitor mode. See the
section describing the Event key, page 3–24.
3.7. Program Keys
The Program keys access the BlastMate III recording settings and allow you to change how the
monitor records events.
3.7.1. Record Mode Key
The Record
Mode
key sets the record mode, sample rate, storage mode, and geophone range.
a. Record Mode
A record mode determines how the BlastMate III records events. The BlastMate III offers the
following record modes.
(1) Single Shot Record Mode
Use single shot record mode to record one event automatically. The BlastMate III records the
event, displays the results, and stops. No further recording occurs. Recording begins automatically
when an event’s ground vibrations or air pressure exceeds the trigger level.
(2) Continuous Record Mode
Use continuous record mode to record multiple events automatically. The BlastMate III records an
event, displays the results, and continues to monitor, ready to record following events. The
BlastMate III records all events whose activity exceeds a preset trigger level.
(3) Manual Record Mode
Use manual record mode if automatic triggering is unreliable, due to excessive wind or nearby
vehicle activity, or to record the background noise level in the vicinity of a site.
(4) Histogram (Strip chart) Record Mode
Use the histogram record mode for long–term recording periods such as monitoring pile driving
operations. Histogram record mode operates with both four and eight channel monitors. Four
channel histogram events can be printed by the monitor, eight channel events cannot. To print
eight channel events, use the BlastWare III software program.
In this mode, the BlastMate III stores summary event information in intervals rather than in the
real time continuous method used in the other record modes. The monitor samples data
continuously at the chosen sample rate but only stores the relevant peaks for the interval. This
reduces the data recorded to specific criteria only and greatly increases the monitor’s recording
time. For each interval, the monitor calculates the maximum positive and negative peaks, the
frequency of the largest peak, and up to two peak vector sums (one with four channel monitors,
two with eight channel monitors). For each channel, the maximum peak, its frequency, and the
largest peak vector sum is calculated over the entire event. Events may be printed in histogram or
tabular mode. Histogram mode prints all peaks over the entire event along with the numerical
results of the data analysis. In tabular mode, only the numerical results are printed.
Note:
Histogram record mode consumes more battery power than the Single Shot, Continuous or
Manual recording modes. We recommend connecting a monitor to the AC adapter or an
external 12 VDC power supply.
Summary of Contents for Blastmate III
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