042
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DATALOGGER
NI400
NI400
043
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DATALOGGER
NI400
NI400
Identification:
A short string (16 characters maximum) to identify the datalogger.
Identification is used for USB data export. Admitted characters are:
Letters (a-z, A-Z)
Numbers (0-9)
Only this special characters: ._()[]-{}
Non-admitted characters will be substituted with _ (underscore) character.
Measurement Settings (Standard, High Precision, Fast):
These are 3 different measure
configurations. User can also modify settings, these are recommended settings.
Fast Measurement:
The datalogger does not execute analog autocalibration.
Relay Warmup:
Delay time between relay activation and acquisition process
ADC Average Number:
Number of average computed by Analog to Digital Converter
Simultaneous Relay Number:
number of simultaneously activated relays
Relay time Gain:
Relay excitation time (tens of milliseconds)
ADC Speed:
ADC Sample rate, in SPS (Sample per Seconds)
Relay Discharge:
before acquisition process, all relays are set to short circuit to dis-
charge capacitors.
Relay Reset:
Optimization of relays movements
Polynomial digit:
This field establishes number of decimal digits for channel with Linear
or Polynomial conversions. This number is used if the channel is left at “DEFAULT”. A
single channel can override this setting in its own setting page.
Enable VW Tracking:
This option will speed up Vibrating Wire Excitation by lowering the
time needed for frequencies scan.
VW Noise subtraction:
It performs a noise analysis of the channel, to have a better SNR
after excitation.
VW Excitation:
This field enables the excitation of Vibrating Wire. If it’s disabled, no
excitation will be applied while reading vibrating wire, thus making the reading impos-
sible. It can be used to test with functions generators.
Thermocouple break check:
before TC readings, NI400 inspects TC circuitry to check
total resistance. If value is out of thresholds, TC will be flagged as broken, and NAN, +FS
or -FS will be recorded. If Thermocouple break check is disabled, this control won’t be
executed. It is useful to disable this control when using calibrators or mV sources con-
nected as thermocouple, since their behavior is not the same as Thermocouple’s wire.
CSV Name Format Upload on FTP: it
allows choice between different file name’s for-
mats.
Low Battery Alarm Threshold:
An alarm will be triggered if V IN voltage drops below
this threshold.
Radio Mode:
Allows to select GSM.
DATALOGGER CONFIGURATION
Overview
This chapter will explain following webserver configuration pages:
• Change Datalogger’s name
• Acquisition speed and precision
• IoT Enabling
• Acquisition Frequency
Configuration -> Datalogge
r
This page is dedicated to low levels tweaks to improve stability and correct readings.
Serial Number:
This is the device serial number. It is composed by 8 decimal digits.
Figure 41
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