18108 Version 17 SQ2020/40
Page 21
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9. Specifications
ANALOGUE INPUTS
Basic accuracy (5-45°C): ..............................................± (0.05% readings + 0.025% range)
Common mode rejection: ...........................................................................................100dB
Input impedance: ...................................................................................................> 1MOHM
Linearity: ..................................................................................................................0.0015%
Series mode line rejection:...........................................................................50/60Hz 100dB
EM field and Conducted RF effect: ………………….………………….…...………….< 1% †
DIGITAL INPUTS
Zero input voltage....................................................................... 0 to 0.5V (or shorted input)
One input voltage..................................................................2.7 to 5V (or open circuit input)
Input protection......................................will turn on below about -0.5V and above about 6V
ANALOGUE-DIGITAL CONVERSION
Type: ....................................................................................................................Sigma-Delta
Resolution: .....................................................................................................................24bit
Sampling rate: ..................................................................Up to 20/100 readings per second
Note: 100Hz Mode not available on 1F8 models
ALARM OUTPUTS.......................................................................4 x open drain FET (18V 0.1A Max)
SENSOR POWER SUPPLY..............................Regulated 5 VDC (50mA) or supply voltage (100mA)
TIME AND DATE...........................................................................................In built clock in 3 formats
SCALING DATA.......................................................Displays readings in preferred engineering units
MEMORY
Internal: ...........................................................................128 Mb (Up to 14,400,000 readings)
External: ...........................................................Up to 1Gb removable MMC/SD memory card
RESOLUTION.................................................................................................Up to 6 significant digits
PROGRAMMING/LOGGER SET-UP................................SquirrelView or SquirrelView Plus software
COMMUNICATION.......................................................USB 1.1 and 2.0 / RS232 / Ethernet (not 1F8)
Internal option: ………………………………………………...……………………………...Wi-fi
External options: ......................................................................GSM, Ethernet and wireless
POWER SUPPLY
Internal: ..........................................................................................6*x AA Alkaline batteries
External: .........................................10-18VDC, reverse polarity and over-voltage protected
† This effect may be larger at 288kHz, re-orientate the input cables or add a suitable
axial ferrite bead close to the logger input if required.
* Maximum operating temperature for supplied alkaline batteries is 50°C
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