Technical Specifications
Model Number
VFC400-WiFi
Temperature Sensor Measurement Range
-40 °C to +99 °C (-40 °F to +210 °F
1
)
Logger Operating Temperature Range
-30 °C to +60 °C (-22 °F to +140 °F)
Storage Temperature Range
-10 °C to +40 °C (32 °F to +104 °F)
Ambient humidity range during transport and use
0 to 95%RH
Rated Temperature Resolution
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0.1 °C (0.2 °F) for measurements -40 °C to +50 °C (-40 °F to +122 °F)
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0.2 °C (0.4 °F) for measur50 °C to +70 °C (+122 °F to +158 °F)
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0.3 °C (0.5 °F) for measur70 °C to +80 °C (+158 °F to +176 °F)
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0.4 °C to 0.6 °C (0.7 °F to 1 °F) for measur80 °C to +99 °C (+176 °F
to +210 °F)
Rated Temperature Accuracy
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Better than ±0.8 °C (±1.4 °F) for -40 °C to -20 °C (-40 °F to -4 °F), typically
±0.5 °C (0.9 °F)
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Better than ±0.5 °C (±0.9 °F) for -20 °C to +40 °C (-4 °F to +104 °F), typically
±0.3 °C (0.6 °F)
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Better than ±0.8 °C (±1.4 °F) for +40 °C to +70 °C (+104 °F to +158 °F),
typically ±0.7 °C (1.3 °F)
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Better than ±1.2 °C (±2.2 °F) for +70 °C to +99 °C (+158 °F to +210 °F),
typically ±1 °C (1.8 °F)
Sensor Compatibility
All ST100 precision thermistor external probes can be interchangeably connected
to the VFC400-WiFi.
Sensor Type
Precision Thermistor
Clock accuracy
Quartz crystal locked real time clock, rated accuracy ±25ppm @ 25 °C (equiv to
2.5 seconds/day)
Rated temperature coefficient is -0.034±0.006ppm/°C (i.e. typ/-
0.00294seconds/day/°C)
Recording Capacity
16129 real time temperature values, giving
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66 days @ 6 minute logging interval or
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110 days @ 10 minute logging interval
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165 days @ 15 minute logging interval.
Supports continuous logging ("wrap-around") or specific recording period.
Statistics memory
for displaying statistics on LCD
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Max/Min values for the past 30 days
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Alarm duration values for the past 30 days
Memory type
Non volatile
Sampling Interval
Configurable from 30 seconds to 18 hours.
Alarm functions
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one configurable upper alarm
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one configurable lower alarm
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four additional alarms, freely configurable as upper or lower alarms
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indicator on display, linked to alarms
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Red Alarm LED
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Audible alarm
1
Values above 199.9 °F cannot be shown on the display. The values will, however, be
recorded and shown in the Control Solutions VTMC software
Start options
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Push button start with optional configurable start delay from 1 minute to 72
hours
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Date/time start up to 180 days in the future
Vibration
Withstands vibration specification as detailed in EN12830:1999
Shock
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Withstands shock specification as detailed in EN12830:1999
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Withstands 5 drops from 1m onto smooth concrete floor without loss of
function or calibration
EMC compliance
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EC EMC directive EN 55024:2010 (Immunity)
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EC EMC directive EN 55032:2015 (Emission)
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47 CFR Part 15 Subpart B (unintentional radiator) as a Class A digital device
as defined in section §15.101
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RoHS2 Directive 2011/65/EU
Environmental
IP51 when vertically mounted or hung
Case Material
Polycarbonate
Power source
5V/5W from commercial USB power supply with Micro-USB plug
2 x 1.5V AAA batteries (optional, recommended)
1 x CR2032 3V LiMnO
2
battery with extended temperature Chemistry – User
replaceable, non-rechargeable (for backup)
Battery life
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AAA batteries - typically around 2 months if unit is operated without power
supply and used under normal operating conditions (6 minute logging,
statistics reviewed on the display no more than once daily for no longer than
30 seconds each time, download data monthly, strong WiFi signal present)
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CR2032 battery - up to 10 years, provided the unit is operated permanently
from AAA batteries or external power
The audible alarm reduces battery life significantly. WiFi connection will not work
when the unit is powered from the CR2032 battery.
Size
123 mm(H) x 63mm (W) x 12.5mm (T) (excluding probe)
Weight
80g (excluding probe and AAA batteries)
Calibration
Factory Accuracy Certificate, traceable to an ISO/IEC 17025 accredited testing
laboratory
PDF features
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compliant with standard 1.6 and later
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Single page report with trip and alarm summary
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Single page day summary with Min/Max report
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Multi page report with list of readings including date/time
WiFi
802.11 b/g/n with WPA/WPA2-PSK security protocols
Wireless Range
50m in open air
USB compatibility
USB 2.0, Micro-USB plug
Download time
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Typically with full memory (16129 readings) less than 10 seconds, depending
on computer or readout device used
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Typically with full memory (16129 readings) less than 30 seconds from time
of insertion to availability of PDF report
Software requirements
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Control Solutions VTMC version 3.1r5 or later to configure and download
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PDF reader software to access onboard PDF files
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LogTag
®
Online account for accessing real-time readings
Accessories
2m Micro-USB to USB-A cable for connecting to a PC or power supply
Page 52
VFC400-WiFi Product User Guide, Revision 1.3, copyright © 2018-2019,
Control Solutions
. All rights reserved.
