15
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Specifications
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LED condition
POWER, TRANSMITTING, ERROR,
FULL
Buzzer sound
Once (when executing key click)
Three times (when error occurs)
Connection
Logger: Infrared optical data transfer
(synchronous serial connection, three wire
type)
Personal computer: RS-232C
(asynchronous serial connection, two wire
type)
Transfer rate
(reference value)
The 3911-20 to Logger 250 data/s
The 3911-20 to PC 1000 data/s (19200
bps)
Recording capacity
16 channels
(16,000 data X 16 channels)
8 channels
(32,000 data X 8 channels)
Power supply
LR03 alkaline battery 1.5 V X4
Maximum rated
power
0.2 VA
Battery life
About 80 days (at 20 , when not in
operation)
Transferring data about 100 times (at 20
, receiving and sending maximum
16000 X 16 channels of data from logger
to personal computer)
Dimensions
Approx.68.5W X 92H X 36D mm
(excluding projections)
(2.7"WX 3.62"H X 1.42"D)
Mass
Approx.150 g (5.3 oz.)
(including batteries)
Location for use
Indoors, altitude up to 2000 m (6562-ft.)
Operate
temperature and
humidity range
-20 to 70 (-4 to 158 ), 80% RH or less
(no condensation)
0 to 40 (32 to 104 ) during data
transfer with personal computer using RS-
232C
Chapter 4
Specifications