PicoLog Self-Help Guide
AR346-1
© Copyright 2014 Pico Technology Ltd.
21/34
To get a sampling rate of 1 ms you need to be in Streaming (single converter only)
mode:
1.
First click File, then New Settings.
2.
In the Recording dialog, for Recording method select Streaming (single converter
only) and then click OK.
3.
When the 1216 has enumerated, click OK again and now you can select the
sample rate and number of samples.
In this mode you can sample on all 16 channels, getting one reading from each in a 1 ms
period. AC voltage, frequency and dB readings will not be offered, though.
Triggering in PicoLog
The PicoLog 1012 and 1216 data loggers can trigger from any of the available input
channels, but only in "Block" mode.
Sampling modes
PicoLog 1000 Series loggers can run in various sampling modes. At high sampling rates,
the logger collects data much faster than it can be sent to the PC. To compensate for
this, the logger stores a block of data in an internal memory buffer, delaying transfer to
the PC until a preset number of data points have been sampled. This is called Block
mode. At very low sampling rates, you may want to switch to Streaming mode. This
allows accurately timed data to be transferred back to the PC in short blocks, without
gaps. Real-time continuous mode is also provided for use at low sampling rates, when
immediate data transfer without gaps is required but timing accuracy is not critical.
Block mode
A sampling mode in which the computer prompts the oscilloscope to collect a block of
data into its internal memory before stopping the oscilloscope and transferring the whole
block into computer memory. This mode of operation is suitable when the input signal
being sampled contains high frequencies. Note: To avoid aliasing effects, the sampling
rate must be greater than twice that of the highest-frequency component of the input
signal.
Streaming mode
This is a sampling mode in which the oscilloscope samples data and returns it to the
computer in an unbroken stream. This mode of operation is suitable when the input
signal being sampled contains only low frequencies.
Real time continuous mode
This is a sampling mode in which the software repeatedly requests single samples from
the oscilloscope. This mode is suitable for low sampling rates when you require the latest
sample to be displayed as soon as it is captured.
Monitor 4-20mA signals with the PicoLog 1012 logger
With the addition of one 120 Ω resistor per channel used, the 1012 can accept 4–20 mA
signals, which will develop 0.48 to 2.4 volts across the 120 Ω resistors. This can be
easily scaled within our free PicoLog program to the correct engineering units and
displayed live on-screen and saved to a file on the hard drive of the attached PC or