BAM 1020-9800 Manual Rev W.docx
Page 40
6.1 CLOCK Setup Screen
The SETUP > CLOCK screen allows for the setting of the time and date. Time is a 24-hour
clock only. Use the arrow keys to select and increment/decrement the desired field, then
press the SAVE soft-key. The lithium battery backup keeps the clock running during power-
down. Met One Instruments recommends a monthly check of the clock.
6.2 SAMPLE Setup Screen
– Range, Sample, and Timing Settings
The SETUP > SAMPLE screen is used to set the BAM 1020 sampling and averaging periods,
and some other important settings. The SAMPLE screen is shown below. The fields can be
edited with the arrow keys, then saved with the SAVE soft-key.
The SETUP > SAMPLE Screen
RS-232:
This allows you to set the baud rate of the RS-232 serial port. The available
values are 300, 600, 1200, 2400, 4800, 9600, 19200, and 38400 baud. The default setting is
9600 baud. The BAM 1020 must be set to 9600 baud during flash firmware upgrades, but
may be set faster
for data collection. The handshaking settings “8N1” means 8 data bits, no
parity, 1 stop bit. These cannot be edited.
BAM SAMPLE:
This value sets the number of minutes per sample hour that the pump is
ON. See Section 4.1 for a description of the hourly cycle. The BAM SAMPLE time must be
set in response to the COUNT TIME value, since current versions of the BAM 1020 allow the
option of setting the count time to 4 or 8 minutes.
If the BAM 1020 is used for PM
2.5
FEM or
EU PM
2.5
monitoring, the BAM SAMPLE must be set to 42 minutes with 8-minute count time.
PM
10
monitors are usually set for 50 minute sample time with 4 minute count time, but may
be set for 42/8 if the installed firmware allows it.
Count Time BAM Sample
Used for
4 min
50 min
PM
10
monitoring, units without a count time setting
8 min
42 min
All PM
2.5
FEM, PM-coarse, EU PM
2.5
monitoring, PM
10
monitoring
The BAM SAMPLE setting has a range of 0-200 minutes for custom applications. If set for
shorter period, such as 15 minutes, the pump will only sample for 15 minutes and then wait
until the end of the hour before beginning a new cycle. This may not leave time for the
membrane span check. Only one pump cycle per hour is allowed, regardless of duration.
Setting the BAM SAMPLE value too long may cause the total measurement cycle to overlap
into the next hour, so that the BAM 1020 only collects the concentration every second hour.
