User Manual

Specifications A-3
Modem
Telit HE910-NAD UMTS/HSPA+/GSM cellular
modem using TCP/IP (Transmiss i on Cont rol
Protocol /Internet P rot ocol)
Bands: UT MS 800/850/AWS/ 1900; GSM 800/
900/1800/1900
Approvals
Hazardous Area – Approved for use in Zone 0,
Class I, Division 1, Groups C & D, in the US and
Zone 0 in the EU via SIRA/ATEX
Certified under I ECEx (International
Elect rotechnical Commi s sion Explosion Proof )
Intrins i c Safety s tandards for use in Z one 0/
Class I , Div. 1, Groups C & D rat ed hazardous
areas.
(See Chapter 1 for a li s t of countries accepti ng
demons t rated compl i ance with the IECEx
scheme.)
Certificate of Compliance f rom the Canadian
Standards Associ at i on (CS A) for Intrinsically Saf e
and Non-Incendive Sys t ems – For Hazardous
Locations, Zone 0.
Calculati ng the Total Days of Storage Available
This section includes a special equation to use in determining the
number of days of data that can be stored in the monitor memory
based on a specific application. Co nside r the following when
calculating the total days:
• The monitor memory holds 832 kilobytes (or 851,968 bytes) of
data.
• The log rate determines the numb er o f readings taken per day.
At a 15-minute sample rate, the monitor will record 96 readings
a day for a single entity. At a 5-minute sample rate, the
monitor will record 288 rea dings a day for a single entity.
• One entity reading co nsumes 8 bytes of monitor memory.
• The following table lists the standard number of entities
recorded for each sensor device. The date/time stamp for a
reading is equal to o ne reading. Therefore, each total below