user manual iitrak2 - eps energy...0.2 13-dec-2012 removed temperature measurement removed battery...

Electronic & Software Engineering

User Manual

iiTRAK2

AC and DC Current Logger

PJ180 Version 2.5

Synopsis

Anerma Electrionics bvba Schaapsdries 25, 2260 Westerlo Belgium www.anerma.be

iiTRAK2

File: PJ180.iiTrak2_UM.2.5.doc Version 2.5 / 25

Revision History

Version Date Improvement

0.1 23-Oct-2012 Initial version

0.2 13-Dec-2012 Removed temperature measurement Removed battery and temperature log

1.0 7-Jan-2014 Extensive rewrite of sections 5 and 7 Updated specifications for battery and real time clock

2.0 10-Nov-2015 Full rewrite

2.1 3-Jun-2016 7.3.3 Mentioned progress bar during read 7.4 Added description for increasing display timeout

2.2 30-Nov-2016 8 Added additional measurement error specifications 9 Added chapter with reported errors

2.3 13-Dec-2016 7.1.1 Added note on real time clock reset

2.4 10-Feb-2017 7.3.3/7.3.4 Mentioned 3 seconds wait time

2.5 7-Mar-2017 5.2.1/6.1 Removed rechargeable batteries option 7.1.4 Removed different profiles 7.3.1 Single procedure for start, stop and readout + Added error messages 8 Lowered maximum number of days to 35

iiTRAK2


Limited Warranty and disclaimer Anerma products are guaranteed to be free of defects in workmanship or materials. Any product that proves to be defective will be replaced or repaired at the discretion of Anerma. LIMITATION This limited warranty only covers conditions resulting from normal use of products. Anerma's warranty shall not apply to the following products: products or parts repaired, altered or modified by other than Anerma or an authorized repair representative, failure to follow proper installation, operation or maintenance instructions and damage resulting from improper storage conditions.

Copyright © 2015 by Anerma. All rights reserved. No part of this publication may be reproduced or translated into any language, in any form, without prior written permission of Anerma.

iiTRAK2


Contents

1. Purpose ................................................................................................. 6

2. Intended Audience ............................................................................... 6

3. Glossary ................................................................................................ 6

4. Safety Regulations ............................................................................... 7

4.1. Warning, caution and notes ................................................................................ 7

4.2. General Safety Regulations ................................................................................. 7

4.3. International standards and certificates ............................................................... 7

4.3.1. EMC ........................................................................................................... 8

4.3.2. Safety ........................................................................................................ 8

5. Instrument Description ........................................................................ 9

5.1. General ............................................................................................................. 9

5.2. Functional Description ........................................................................................ 9

5.2.1. Power supply .............................................................................................. 9

5.2.2. Microcontroller............................................................................................ 9

5.2.3. Inputs ........................................................................................................ 9

5.2.4. Real Time Clock .......................................................................................... 9

5.2.5. Communication .......................................................................................... 9

5.2.6. Display ..................................................................................................... 10

5.2.7. Memory ................................................................................................... 10

6. Installation ......................................................................................... 11

6.1. Battery ............................................................................................................ 11

6.2. Current Clamp ................................................................................................. 12

6.3. 4..20 mA Analog Input ..................................................................................... 13

6.4. USB Drive ........................................................................................................ 13

7. Operation ............................................................................................ 14

7.1. Files ................................................................................................................ 14

7.1.1. IITRAK2.TMP ............................................................................................ 14

7.1.2. IITRAK2.LOG ............................................................................................ 16

7.1.3. IITRAK2.OLD ............................................................................................ 16

7.1.4. IITRAK*.BTY ............................................................................................ 16

7.1.5. IITRAK*.CFG ............................................................................................ 16

7.1.6. IITRAK*.APL ............................................................................................ 16

7.2. Power Up ........................................................................................................ 17

iiTRAK2


7.3. Procedures....................................................................................................... 17

7.3.1. Run Logger ............................................................................................... 17

7.3.1.1. Start Logger ......................................................................................... 17

7.3.1.2. Stop Logger .......................................................................................... 18

7.3.1.3. Read out of the logged data .................................................................. 18

7.3.2. Upgrade Software ..................................................................................... 18

7.4. Display ............................................................................................................ 19

7.5. Push button ..................................................................................................... 19

8. Technical Specifications ..................................................................... 20

9. Reported errors .................................................................................. 23

9.1. iiTrak2 hangs and seems dead. ......................................................................... 23

List of figures ............................................................................................ 24

List of Tables ............................................................................................. 25

iiTRAK2


1. Purpose

This document describes the user manual and the functional specifications of the iiTRAK2 Current Logger. The iiTRAK2 is identified by Project-ID PJ180.

2. Intended Audience

The intended audience is generally anybody who wants to familiarize with and use the iiTRAK2.

3. Glossary

A Ampere

AC Alternating Current (50 or 60Hz for the VIPtrak)

ADC Analog to Digital Converter

ASCII American Standard Code for Information Interchange

mA milli-Ampere

MH Metal-Hydride

N Neutral

PC Personal Computer

ppm Parts Pro Million

RMS Root Mean Square, calculates effective value

RTC Real time Clock

UTC Universal Time Code (Brussels= UTC+2)

Vac Alternating voltage

Vdc Direct voltage (no frequency)

Vrms Effective Voltage (calculated by root-mean-square method)

W

*

Watt = 1 J/s

Wild card in file names

iiTRAK2


4. Safety Regulations

4.1. Warning, caution and notes

Warnings, cautions and notes within this manual will be used as follows: WARNING: Used to denote a danger to personnel of serious injury and/or death. The warning will be preceded by the caption WARNING and the detail of any warning will be in bold and uppercase. CAUTION: Used to denote a possibility of damage to material or equipment but not a danger to personnel. The caution will be preceded by the caption CAUTION and the detail of any caution will be in bold and lowercase. NOTE: used to draw attention to information that is extraneous to the immediate subject of the text. A note will be preceded by the caption NOTE and the detail will be in italics. All warnings, cautions and notes will precede the relevant sections of the text.

4.2. General Safety Regulations

WARNING: THIS DEVICE IS NOT DESIGNED FOR AND THEREFORE NOT INTENDED FOR USE IN ANY ENVIRONMENT WHERE HUMAN LIFE DEPENDS DIRECTLY ON THE USE OF PROVEN RELIABILITY AND FAILSAFE TECHNIQUES AND COMPONENTS. WARNING: THIS DEVICE MUST ONLY BE OPERATED IN ENVIRONMENTS LIMITED TO THE SPECIFIED TEMPERATURE AND HUMIDITY CONDITIONS.

WARNING: THIS DEVICE IS NOT PROTECTED AGAINST ANY CORROSION FROM ANY TOXICAL VAST PARTICLE, FLUID OR GAS. WARNING: THIS DEVICE MUST NOT BE USED IN NUCLEAR PLANTS OR IN ANY EXPLOSIVE ENVIRONMENT. CAUTION: The maximum input voltages must not be exceeded.

4.3. International standards and certificates

The iiTRAK2 logger meets the specifications of the following standards, regulations and guidelines: The iiTRAK2 logger is certified according to:

iiTRAK2


4.3.1. EMC

In accordance with IEC61326 including amendment No1

4.3.2. Safety

Complies with IEC 1010-2-032 category III, Pollution degree 2

iiTRAK2


5. Instrument Description

5.1. General

The iiTRAK2 is a precise current meter that combines the measurement of a flexible current clamp and a 4..20mA DC current input. The current clamp input auto-ranges from 1 A to 3000 A (AC). All readings and events are stored with time and date, while the device has a real time clock with separate battery-backup on board. Logged data is compressed and stored in the 16Mbyte physical memory. At read out, data is decompressed, and presented as a disk of 128Mbyte (FAT16) on the USB. The protocol for USB disks/memory sticks is used, so the drivers are already present.

5.2. Functional Description

5.2.1. Power supply

The device is powered by a single AA-battery cell. This can be a Mangan type cell of 1.5V. Note: the rest energy curve for the “Duracell ultra power” battery is used by default, to calculate the rest energy, in potential log-days.

5.2.2. Microcontroller

The micro controller measures input and output, controls the display, performs calculations and stores readings and events. The processor board is build around a 32-bit Arm Cortex M0+ 48 MHz Micro controller. To save power the processor runs at 4MHz during measurements and goes into sleep mode between samples.

5.2.3. Inputs

iiTRAK2 measures AC-current via the fixed flexible current probe in a range from 1A to 3000A (AC-current only). Harmonic currents, different from 50 or 60Hz, are rejected. A 4..20 mA signal input signal can be measured by the 2-pin input port. The device is factory calibrated.

5.2.4. Real Time Clock

The iiTRAK2 has an accurate real time clock on board, powered by a separate lithium-battery. This clock has an offset and temperature compensation. All logging is done with a time and date stamp.

5.2.5. Communication

All user communication to the logger is done via the USB connection. When the iiTRAK2 is connected to a PC with a USB cable, the PC will detect a 128MB drive. Normal disk operations can then be performed.

iiTRAK2


5.2.6. Display

The iiTRAK2 contains a graphical 128x64 pixel OLED display that shows the measured values in real-time.

5.2.7. Memory

The iiTRAK2 memory can hold 2 log files with 35 days of data each.

iiTRAK2


6. Installation

Display

4..20mA Connector

Current Coil

Button

USB

Figure 6-1 Top & Front View

6.1. Battery

The device is powered by a single Mangan AA-battery cell of 1.5 Vdc. WARNING: REPLACE THE BATTERY ONLY BY THE TYPE LISTED ABOVE Softly slip the Battery Compartment door away from the logger while pressing the door slightly on the mark. Place the battery in the battery holder, and replace the compartment door. CAUTION: Never reverse battery polarity. Although iiTRAK2 has reverse battery protection, the logger will not operate. Polarity is represented in Figure 6-2 Battery Compartment NOTE1: The iiTRAK2 has no power On/Off switch. When batteries are in place, the logger will immediately be ready for operation.

iiTRAK2


Battery Compartment

Figure 6-2 Battery Compartment

6.2. Current Clamp

No specific installation safety rules have to be followed. Place the flexible current clamp round the power line that has to be measured. Close the current clamp for accurate measurements. The current clamp is not sensible to current direction flow. The iiTRAK2 measured both the base frequency (50 or 60 Hz) component of the input signal and the True-RMS value. Both measurements can be viewed on the LCD display. Only the base frequency component is logged. NOTE: The logged values will be different from results measured by True-RMS meters, since True-RMS meters measure signals with harmonics included. The following 3 methods can be used to measure current:

- Rectified mean method: this is only accurate when the current is pure sinusoidal. - True-RMS: this method measures the real current that flows through a wire. - 50 or 60Hz base current: because only the base frequency current delivers power to

an engine, this measurement can be used to calculate the consumed power of an electric motor or load.

P=U*I(base)*cos(φφφφ)

U(base) and U(eff) are only different in poor power distribution grids with harmonic distortion on the supplied voltage.

iiTRAK2


6.3. 4..20 mA Analog Input

iiTRAK2 has one 4..20 mA analog input. Connect an active 4..20mA sensor to the input connector as shown below. The logged value is the absolute value of the measured current. A resettable PTC fuse will limit the current. CAUTION: The 4..20mA maximum input voltage should not exceed 24 Vdc.

iiTRAK2

24Vdc

Figure 6-3 4..20mA Analog Input Connection

6.4. USB Drive

When connected over USB, the iiTRAK2 acts as a 128MB USB drive. The drive is formatted by the iiTRAK2 itself. No formatting by a PC is required.

iiTRAK2


7. Operation

7.1. Files

All communication with the logger is done via the USB drive. Six types of files are used to perform logger settings and read logger data:

File Access Description

IITRAK2.TMP R Contains the most recently measured data without time synchronization, it’s the active log file.

IITRAK2.LOG R Contains the most recently measured data with time synchronization

IITRAK2.OLD R A backup of the previously measured data

IITRAK*.CFG W Time synchronization file

IITRAK*.BTY R/W Battery profile

IITRAK*.APL W New Logger application software

Table 7-1 File List The first 3 files are log files and are generated by the IITRAK2 itself. Only the 3 last files can be written by the user. Make sure that each filename starts with the 6 characters “IITRAK” and that it has the correct file extension. The rest of the filename is free. This is indicated by the wild card “*“ in the filenames. Names longer than 8 characters are allowed. The IITRAK*.APL file contains application code and is therefore not readable. Only the first bytes are readable, these contain the version number and date. All other files are text-only based. This means that they can easily be created, modified and saved using a standard text-editor (NotePad, WordPad, EditPlus, ...).

7.1.1. IITRAK2.TMP

IITRAK2.TMP is the file to which the device writes its measured current data from the flexible current clamp and the 4..20mA current input. The data is stored in ASCII format. iiTRAK-1712600 SoftVersion:2.0.7.0 CalVersion:0.0.0.1

InternalTimeLogStart:500478781 InternalTimeReadOut:

UTCTimeReadOut: LogInterval:1

I (A) In (mA)

----- -------

0 0

0 0

0 0

0 0

0 0

0 0

0 0

0 0

iiTRAK-1712600 500478789 Log closed due to USB connect

Every time a new log sequence is started, the device will create a device header and a data header.

iiTRAK2


The device header contains several fields, each with a name and a value. These fields contain the following information:

Item Description

iiTRAK2-n Serial number

SoftVersion Application Software Version number

CalVersion Calibration Software Version number

InternalTimeLogStart The start time of the log based on the iiTrak2 internal clock, counted in seconds

InternalTimeReadOut The readout time of the log based on the iiTrak2 internal clock, counted in seconds

UTCTimeReadOut The readout time of the log based on the PC clock

LogInterval Log interval time (in seconds)

Table 7-2 Log File Device Header

Item Description

I (A) Current clamp input from 1.0 to 3000.0 A

In (mA) 4 to 20 mA current input

Table 7-3 Log File Data Header Header information is separated by tabs only (ASCII character 9) and ends by a CR character. The .TMP file contains no time synchronization. The value for the fields “InternalTimeReadOut” and “UTCTimeReadOut” is omitted. After the header a single data line is added for each log. The data values are separated by one tab. Every Line is ended by a CR character. When logging is ended, a message is appended to the log file. When a USB cable is connected: iiTRAK-1712600 500478789 Log closed due to USB connect

When the user stop the log with the button: iiTRAK-1712600 500478789 Log closed by user

When the logging memory is full: iiTRAK-1712600 500478789 Log closed while Card full

To limit the file size, unnecessary characters are omitted:

0.5 is printed as .5 0.0 is printed as 0 1.0 is printed as 1

At startup, the time value in the real time clock is verified. If it is incorrect, the time is reset. This is indicated in the logfile with the following message: iiTRAK-1712600 518400019 Real time clock reset

iiTRAK2


7.1.2. IITRAK2.LOG

IITRAK*.LOG contains the same data as IITRAK*.TMP and includes time synchronization. In the header, the fields “InternalTimeReadOut” and “UTCTimeReadOut” have a value. iiTRAK-1712600 SoftVersion:2.0.7.0 CalVersion:0.0.0.1

InternalTimeLogStart:500478781

InternalTimeReadOut:500479105 UTCTimeReadOut:12345

LogInterval:1

I (A) In (mA)

----- -------

0 0

0 0

0 0

0 0

0 0

0 0

0 0

0 0

iiTRAK-1712600 500478789 Log closed due to USB connect

7.1.3. IITRAK2.OLD

This is a backup of the last IITRAK2.LOG file.

7.1.4. IITRAK*.BTY

IITRAK*.BTY contains a battery profile. This profile is used to estimate the amount of logging left based on the battery voltage.

7.1.5. IITRAK*.CFG

IITRAK*.CFG contains time synchronization information. The content is a string of 1 to 10 digits. Other lengths aren’t allowed. This decimal number can range between 0 and 4294967295 On writing this file to the IITRAK2, the following process is started if IITRAK2.TMP exist:

- The IITRAK2.OLD file is deleted - The IITRAK2.LOG file is renamed to IITRAK2.OLD - The IITRAK2.TMP file is renamed to IITRAK2.LOG - The internal iiTrak2 time is stored in the InternalTimeReadOut field of the

IITRAK2.LOG file. - The time found in the IITRAK*.CFG file is stored in the UTCTimeReadOutfiles field of

the IITRAK2.LOG file. - The IITRAK*.CFG file is deleted - USB is disconnected - USB is reconnected

7.1.6. IITRAK*.APL

IITRAK*.APL is an optional file: it is not necessary for correct operation of the device. This file is intended to easily upload software with enhanced features and bug recovery.

iiTRAK2


After this file is written to the IITRAK2, the format is ok, the program code of the iiTrak2 is replaced when and new application version number is different from the actual one. When software upload is finished, the logger immediately resets. CAUTION: Apply only IITRAK*.APL files provided by ANERMA. Any .APL file from a different source than ANERMA may result in mal- or nonfunctioning of iiTRAK2 at all.

7.2. Power Up

The iiTRAK2 has no power-ON/OFF switch. Power is applied when batteries are placed into the battery placeholder.

7.3. Procedures

7.3.1. Run Logger

The following procedure describes how to start the logger and read out the data.

Step Description

1 Make sure the iiTrak2 has no supply: USB is not connected and no battery is inserted.

2 Insert a new AA Alkaline battery

3 iiTrak2 will check the battery. If battery < 1.25V then “Bat: 0 days” is displayed and no log starts → return to Step 2

4 iiTRAK2 starts logging. “REC” is blinking (If error message “E1” to “E4” is blinking, return the iiTRAK2 for repair.)

5 iiTrak2 stops logging and goes into low power state when memory is full (35 days) or battery < 1.25V (display shows “Do not remove battery before downloading logfile!” if button is pressed) or button iiTrak2 pressed (6 sec) or connected to PC with USB Do not remove the battery and go to Step 6

6 Connect the iiTrak2 to a PC with a USB cable. Synchronize and read out the log.

7 Remove USB and battery

Table 7-4 Log procedure

7.3.1.1. Start Logger

The iiTRAK2 starts logging when a battery is inserted. USB must be disconnected. When starting a log, the iiTRAK2 performs a status check. If any error is detected, no log is started. This is indicated on the screen by a blinking error indication. Instead of a blinking “REC” sign, the display shows “REC off”.

iiTRAK2


Error Indication

Description

E1 The internal real time clock failed.

E2 The lithium battery for the internal real time clock is low.

E3 The iiTRAK2 calibration values are incorrect.

E4 The logging memory is not functioning correctly.

Table 7-5 Error Indications When inserting the battery, the next process is started when no IITRAK2.TMP file exist:

- The IITRAK2.OLD file is deleted - A IITRAK2.TMP file is created

The display indicates that the log is being initiated. Every 200 seconds, a new packet with measurements is stored in the IITRAK2.TMP file. The first packet contains the measurement header. During logging, REC will blink on the display.

7.3.1.2. Stop Logger

The logging can be stopped by pressing the button for longer than 6 seconds. The display shows a progress bar to indicate when logging shall stop. The last measurements, not stored yet, are written to the IITRAK2.TMP file together with a log end message. Logging also stops when a USB connection is made. The device never logs when USB is connected. Logging is also stopped when the memory is full, or when the battery goes empty. The display indicates “REC off” when the iiTRAK2 is not logging. Do not remove the battery after logging has stopped. The data has to be read out first.

7.3.1.3. Read out of the logged data

Step Description

1 Stop the logging.

2 Connect the iiTRAK2 to a PC with a USB cable. The device will become available as a USB disk. The disk label contains the device’s serial number.

3 Write an IITRAK*.CFG file to the device containing the actual time of the PC. After this step, the iiTRAK2 will wait until 3 seconds have passed without disk activity. After that the iiTRAK2 will reset the disk.

4 Read the IITRAK2.LOG file. The display shows a progress bar during reading.

Table 7-6 Read procedure

7.3.2. Upgrade Software

To upgrade to a new software version, the IITRAK*.APL file for that version is required.

iiTRAK2


Make a USB connection to the IITRAK2. Write the APL file to the iiTRAK2. The iiTRAK2 will wait untill 3 seconds have passed without disk activity. Then it starts the upgrade. If it succeeds, it will reset and show the new application version on the display. The IITRAK*.APL file will be removed automatically.

7.4. Display

The sharp OLED display can be read out from any angle and is self-lighting. Press the button for at least one second to enable the display. Next info will be shown:

- General information during 3 seconds. - Measured currents during 27 seconds. - The display is switched off to save energy.

The timeout for the screen is 30 seconds. If the push button is pressed 3 times within 2 minutes, the timeout is increased to 5 minutes.

7.5. Push button

A push on the button results in next actions: - A push shorter than 1 seconds results in no action. - A push between 1 and 3 seconds will switch on the display. See 7.4 - A push between 3 and 6 seconds will show the stop in progress bar - A push longer than 6 seconds will stop the logging. See 7.3.2

iiTRAK2


8. Technical Specifications

Specification: Battery Units Value

Battery life: Alkaline type AA 1500mAh days 35

Table 8-1 Battery

Specification: Real Time Clock Units Value

Accuracy at 25 °C ppm ±10

Expected Build in Lithium Battery life years 10

Table 8-2 Real Time Clock

Specification: Current Clamp Input

Units Value

Measurement method - 1 Phase AC coupled base current

Nominal current range A AC 0..3000

Crest Factor - 2.5 (1) Frequency Range Hz 48..52 and 58..62

Isolation voltage V AC 1000

Accuracy(current > 3A) 0 to 70° operating temperature Including 2 Years aging

% of measurement 1

Additional error due to measurement position.

% of measurement 0 at the location of calibration 0.5 within 50mm of this location 1 within 80mm of this location 2 for other locations

Resolution up to 300A A AC 0.1

Resolution 300A up A AC 1

(1) At 3000A

Table 8-3 Current Clamp Input

Figure 8-1 Current Clamp total error, 0 to 70°, 2 Year aging

0,1 1 10 100 1000

0

1

2

3

4

5Maximum total error [%]

iiTRAK2


Figure 8-2 shows the error in respect to the position of the conductor/cable in the clamp. Calibration is done at the position indicated by the cable stub. For a minimal position error, place the coil around the cable at the same place if possible. It is best placed as far away as possible from the clasp.

Figure 8-2 Current Clamp additional error due to position of the conductor

Specification: 4..20mA Current Input Units Value

Nominal Input Current mA DC 4..20

Absolute maximum input voltage V DC 24

Maximum voltage drop V DC 2

Isolation voltage, USB not connected, battery compartment closed

V AC 1000

Isolation voltage, USB connected, or battery compartment open

V AC 0

Accuracy 0 to 70° operating temperature Including 2 Years aging

% 1

Resolution mA DC 0.03

Table 8-4 4..20mA Current Input

iiTRAK2


Specification: Dimensions Units Value

Height x Width x Depth mm 33 x 93 x 66 (2) Weight (battery not included) g 210

Cable length between coil and logger m 2

Coil Length mm 500

Coil Capacity mm 150 (3) Equipment class - Class 1

Measurement Category - III

Pollution Degree - 2

(2) Dimensions are mentioned without plugs mounted and coil not included. (3) Total diameter of cable(s)

Table 8-5 Dimensions

Specification: Operational Environment Value

Ambient Temperature 0 to 60 °C

Humidity 95% relative humidity, non-condensing

Table 8-6 Operational Environment

Specification: Storage Environment Value

Temperature -20 to +70 °C

Humidity 95% relative humidity, non-condensing

Table 8-7 Storage Environment

iiTRAK2


9. Reported errors

9.1. iiTrak2 hangs and seems dead.

There is a probability of 10% that the iiTrak2 will hang if the battery is removed while the display is on. This error can be fixed with a software upgrade. From serial number 1712600 and up, this new software version is installed by default. Action: do not remove the battery while the display is on. Reanimation: follow and repeat the next sequence for 1 to 8 times.

1) Remove the battery and wait 3 seconds. 2) Insert the battery and wait 2 seconds 3) If the display doesn’t light up, go to step 1 4) When the display lights up, then this reanimation is successful.

iiTRAK2


List of figures

Figure 6-1 Top & Front View .......................................................................................... 11

Figure 6-2 Battery Compartment .................................................................................... 12

Figure 6-3 4..20mA Analog Input Connection .................................................................. 13

iiTRAK2


List of Tables

Table 7-1 File List .......................................................................................................... 14

Table 7-2 Log File Device Header ................................................................................... 15

Table 7-3 Log File Data Header ...................................................................................... 15

Table 7-4 Log procedure ................................................................................................ 17

Table 7-5 Error Indications ............................................................................................ 18

Table 7-6 Read procedure ............................................................................................. 18

Table 8-1 Battery .......................................................................................................... 20

Table 8-2 Real Time Clock ............................................................................................. 20

Table 8-3 Current Clamp Input ....................................................................................... 20

Table 8-4 4..20mA Current Input.................................................................................... 21

Table 8-5 Dimensions .................................................................................................... 22

Table 8-6 Operational Environment ................................................................................ 22

Table 8-7 Storage Environment ...................................................................................... 22

user manual iitrak2 - eps energy...0.2 13-dec-2012 removed temperature measurement removed battery...

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