Lighthouse HANDHELD 3016 IAQ Gen E Operating Manual
5-40 5HY
Note: When the buffer
has wrapped, the record
that is first displayed in the
Data screen is the first
record in the data buffer.
This may not be Rec#1.
If you press the single
down arrow button once,
the instrument will display
the last record in the data
buffer.
• Rec# - Identifies which record is currently viewed.
• *Recs - Displays how many records are currently stored in the
HANDHELD’s buffer. When there is an asterisk (*) next to the
word “Recs”, this means that the 3000 record data buffer has
wrapped. The basic concept is First In, First Out (FIFO).
• Size - Lists the channel sizes configured on the instrument.
• PM - Indicates Particulate Matter, expressed in micrograms per
cubic meter (ugr/m3). PM is calculated by summing the mass
concentration levels for all channels smaller than the indicated
channel. For example, the PM 1.0 = (Mass Concentration of 0.3) +
(Mass Concentration of 0.5). PM 10.0 = the sum of the Mass
Concentration levels of the 0.3 + 0.5 + 1.0 + 2.5 + 5.0m channels.
Note that the Mass Concentration of the 10.0m channel is not
included. It is, however, included in the TPM value, see TPM
below.
Figure 5-48 can be used to aid understanding of PM. Note that the
1.0 value, 6.41, is the sum of the values in the ugr/m3 entries for the
0.3 and 0.5m channels (2.12 + 4.29 = 6.41).
• TPM - Total Particulate Matter, expressed in micrograms per cubic
meter, is the sum of mass concentration levels of all channels.
• ugr/m3 - Lists the Mass Concentrations for each individual
channel, expressed in micrograms per cubic meter (ugr/m3).
• Density - The mathematical formula used to compute Mass
Concentration (simplifies to Mass = Density * Volume) assumes a
density value of Carbon, which is 2.5 grams per milliliter. The
Density factor may be changed, if desired, using the LMS XChange
program.
• Loc - Indicates the location at which the data record was recorded.
The Location name listed is the alphanumeric label that was saved.
• Smpl - Indicates the Sample Time (HH:MM:SS) at which the data
record was sampled.
• Date - Indicates the instrument date on which the data was
recorded. The date will display in the format selected in the
configuration (MM/DD/YYYY, DD/MM/YYYY or YYYY/MM/
DD).
• Time - Indicates the instrument time at which the data was
recorded (HH:MM:SS).
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