Systems Micro Technology APT-9600 User manual

Revision 08.1. Date 20190218 1
APT-9600
Asset Tracking Device
User Manual
Contents
Contents.................................................................................................................................................1
1. History of revisions .....................................................................................................................2
2. Introduction ................................................................................................................................2
3. Abbreviations..............................................................................................................................2
4. Instructions for the shipper ........................................................................................................3
5. Turn ON and Turn OFF ................................................................................................................3
6. Device Components....................................................................................................................4
7. Types of Data ..............................................................................................................................4
7.1. Events history - type of records....................................................................................... 5
7.2. Demo and Normal Mode for Sensor Alert ..............................................................................5
7.3. One-time and Long Alerts .......................................................................................................6
8. Communication Logic .................................................................................................................7
9. GPS Logic.....................................................................................................................................8
10. Parameters of Device..................................................................................................................9
10.1. Forced Active Mode.............................................................................................................9
10.2. Train mode...........................................................................................................................9
11. Sensor Characteristics...............................................................................................................10
11.1. Sensor Sampling Rate .................................................................................................... 10
11.2. Temperature .................................................................................................................. 10

Revision 08.1. Date 20190218 2
11.3. Shock, Vibration and Tilt. Methods and Units............................................................... 11
12. Status Check by Gesture Feature..............................................................................................15
FCC Information...................................................................................................................................16
References ...........................................................................................................................................16
1. History of revisions
#rev
Date
List of changes
08
20190218
Inclusion of FCC information
07
20180821
Basic revision for clarity
04
20180110
Added description of SVT methods and units (shock vibration tilt)
01-03
20170501
Basic revision
2. Introduction
This document describes the following key items:
-instructions for the shipper
-basic logic of device operation and its operating modes
-main functionality and features
-description of how the device gets and processes data from its sensors
-description of device communication logic
-description of device GPS update logic
-interaction for the user and the device
3. Abbreviations
oAccel - accelerometer

Revision 08.1. Date 20190218 3
4. Instructions for the shipper
Before the shipment of cargo with an attached APT-9600 device it is recommended for the shipper
to make sure that device is activated. To check the device status, use the gesture feature described
in the Status Check by Gesture Feature section of this document.
If the cargo is shipped while the device is not activated then there will be no records from the cargo’s
trip.
5. Turn ON and Turn OFF
The process to turn ON (activation) and turn OFF (de-activation) is simple:
-Short click of the MODE button to turn ON
1
.
-Long press of the MODE button to turn OFF
2
.
1
Short clicks just mean a simple click and release of the button
2
Long press means press and hold the button until the LED activates (5-6 seconds)

Revision 08.1. Date 20190218 4
•Active mode: The mode when device is actively monitoring the cargo. The sensors are
turned on in accordance to the parameters set in web portal.
•Standby mode (Reverse mode): The mode for Reverse logistics of the device. In this mode all
sensors are off and the device is only set to communicate every 30 days.
6. Device Components
The APT-9600 device has the following components:
-charging port (protected by rubber cover)
-sensors (sensitive spots on the plastic enclosure)
-MODE button (to turn ON and OFF)
-LED (indication of mode)
7. Types of Data
The Device has two general types of data:
1) Events history—contains location, battery, and sensor measurements obtained during location
update or communication session.
2) Sensor measurements history—contains measurements obtained on a regular basis according to
the time intervals set in the Parameters applied to the device.

Revision 08.1. Date 20190218 5
7.1.Events history - type of records
Events history consists of two types of records:
1) Event means a record obtained during a normal state of secured cargo, when there is no initiation of
an alert state. An Example would be during every scheduled communication or every GPS update.
2) Alert means a record with a sensor state of alarm or return from alarmed state to normal. The
alarming state happens when the value measured by a sensor exceeds the allowed value (threshold)
set in the Parameters and applied to the device. For example, the max temperature is set to +40⁰C
and the current measured value is +43⁰C, this will cause the device to generate a temperature alert.
7.2.Demo and Normal Mode for Sensor Alert
There are two general modes for sensor alerts:
•Normal mode
•Demo mode
The selection of Demo or Normal mode is done in the Parameters tab of the web portal. Demo or
Normal mode is applied to the entire device, i.e. to all of its sensors.
Demo/Normal mode defines the minimum delay between the repeated sensor alerts.
•For Demo mode the min. delay is 1 second.
•For Normal mode the min. delay is different for every sensor. Value of delays are specified in Table 1.
Table 1. Min delay between repeated sensor alerts for Normal mode
Sensor
Min. Delay, [s]
Temperature
1800
Shock
90
Vibration
1800
Tilt
1800
Low power3
1800
The specified delay in Normal mode means that the sensor doesn't generate additional records of
alerts until the delay ends, since the moment when alert was triggered.
NOTE: This rule is in place no matter how alert state was changed –from triggered to normal, or
from normal to triggered.
3
Low-power alert is generated when estimated remaining battery charge is under 10%.

Revision 08.1. Date 20190218 6
7.3.One-time and Long Alerts
There are two types of alerts:
1) One-time alert records to the Events history when the sensor goes over the threshold value. When
the sensor returns to a normal state no additional recording is done by the device.
2) Long-time alert records to the Events history when the sensor goes over the threshold value and
continues until the sensor returns to a normal state.
Type of alerts per sensors are specified in the Table 2.
Table 2. One-time and long alerts
Sensor
Type of alerts
Note
Temperature
Long
Alert means that the temperature is either
higher than max threshold or lower than min
threshold
Shock
One-time
Alert means that the shock value exceeded
max threshold. Shock is an instant event.
Therefore, it is related to "one-time" alert.
Vibration
Long
Alert means that vibration value exceeded
max threshold
Tilt
Long
Alert means that the tilt value exceeded max
threshold
Low-power
Long
Alert means that the remaining battery
charge is low (at or below 10%)
Reverse
Long
Alert means that device was turned OFF

Revision 08.1. Date 20190218 7
8. Communication Logic
Table 3 contains default communication intervals and availability to change the interval remotely, via
command from the web portal.
The default communication interval will be in effect when the device is first powered on (battery
connected or battery charged after full depletion) until the first successful communication with the
server, when the device downloads the new parameter settings from the server.
Table 3. Default communication intervals
Mode
Comm
interval
Possible to change
remotely
NOTE
Active
15 min
YES
May be changed via settings
Reverse
1 month
NO
Value is hardcoded in firmware
Logic of communication is presented in the flowchart.

Revision 08.1. Date 20190218 8
9. GPS Logic

Revision 08.1. Date 20190218 9
10. Parameters of Device
Parameters of a device are set remotely via the web portal. This section describes specific options
set in Parameters.
10.1. Forced Active Mode
User can turn on "Forced Active Mode" for a particular device.
•When Forced Active Mode is turned on the device always stays in active mode.
•If the MODE button is pressed for >5 s the LED quickly flashes twice to indicate to the user
that device cannot be switched to reverse mode.
•Communication intervals in Forced Active Mode are the same as in active mode.
•The Forced Active Mode is deactivated the same way as it is activated: by changing the
Parameters in the web portal.
Forced Active Mode from reverse/off mode:
If the device is in reverse logistics mode, it communicates every month. If it receives the parameter
to activate the forced active mode during that communication period, it will turn and stay on. The
user can remotely activate a device, even in reverse logistics mode, but they need to wait a
maximum of 1 month.
10.2. Train mode
Train mode increases the probability of fast data delivery to the server in poor cellular coverage
areas.
NOTE: Name of this mode came from the application of the device on a train where the coverage is
sometimes good and sometimes not, but is never lost for a long time.
Description:
When Train mode is ON, if the device fails to communicate with the server, it cyclically repeats the
attempts to communicate, making a special delay between attempts.
•By default, the train mode is OFF.
•Train mode may be turned ON/OFF in the web portal, using Parameters.
Train mode works for any communications made by the device - scheduled or triggered by an alert.
The Train mode operation functions as follows:
•10 repeated connection attempts with 10-minute intervals between the attempts.
Failed GPRS attempts take up 1-5 minutes. Therefore, it will be 1-5 minutes of
LTE/GSM active and 5-9 minutes of pause. Then an interval of LTE/GSM active
followed by the interval of pause and so on, in a cycle.
•If communications fail 10 times, then attempts are made every hour.

Revision 08.1. Date 20190218 10
•Attempts are repeated until a successful connection takes place or until battery
capacity falls below or equal to 20%.
•Once the battery reaches 20%, the device reverts to the standard communication
interval.
11. Sensor Characteristics
11.1. Sensor Sampling Rate
Sensor
Sampling Rate
NOTE
Shock
32 Hz
Same rate for normal and
economic mode
Vibration
32 Hz
Same rate for normal and
economic mode
Tilt
32 Hz
Same rate for normal and
economic mode
Temperature
1 Hz
for normal mode
0.1 Hz
for economic mode
11.2. Temperature
The temperature sensor has restrictions for setting the threshold values used for triggering alerts.
The restrictions are as follows:
Where dt is the difference between the min and max values for temperature set in Parameters.
The device will adapt the threshold values not fitting the restrictions according to the following rules:
•Temperature rule:
dt >= 2.1 degrees Celsius
dt_min = 2.1
if max - min < dt_min then
new_max = max;
new_min = max-dt_min

Revision 08.1. Date 20190218 11
In summary, if the maximum value and the minimum value are within 2.1 degrees Celsius, the
minimum value will be adjusted to be 2.1 degrees Celsius lower than the maximum value.
Temperature alert is generated by the following rules:
* Hysteresis is fixed and equal to 1.0 degree Celsius.
11.3. Shock, Vibration and Tilt. Methods and Units.
11.3.1. Tilt
Units: tilt is reported in degrees.
Method: tilt is calculated as an angle above horizontal plane. Rotation along the gravity vector
doesn't affect the tilt calculation.
Max value of tilt is 180 deg.
a) alert appears (higher than max value):
value > threshold
b) alert disappears:
value < threshold - hysteresis*
c) alert appears (lower than min value):
value < threshold
d) alert disappears:
value > threshold + hysteresis

Revision 08.1. Date 20190218 12
11.3.2. Shock
Units: shock is reported in [g] units. NOTE: [g] is equal to 9.8 m/s2.
Method: shock is a fast event. Device uses the following approach to estimate the magnitude of
shock:
- high frequency digitization of accelerometer measurements:
RAWRAWRAW ZYX ,,
- low-pass filtering to compute the constant component caused by the gravity vector, its projection
on the current axes of the device:
),,(,, RAWRAWRAWLPFLPFLPF ZYXlowpassZYX =
- computation of shock vector value - removal of constant component from the raw value:
   
),,,,,(,, LPFLPFLPFRAWRAWRAWiii ZYXZYXdiffZYX =
- computation of shock magnitude as a vector norm:
222 iiishock ZYXA ++=
Shock Magnitude (g)
11.3.3. Vibration
Units: vibration is reported in g2/Hz.
Method: vibration is computed as a power spectral density (PSD) of measured acceleration.

Revision 08.1. Date 20190218 13
Every second the device makes FFT. With FFT the device only takes into account the latest period of
time(T) equal to a few seconds and utilizes the Hanning Window function for the removal of boundary
transient processes caused by the periodicity of the function. The periodicity in turn is caused as the
result of FFT transformation.
( ) ( ) ( )
2 2 2
t R R R
A X X p Y Y p Z Z p
= − + + − + + − +
tt
B A A

=−
For given frequency band (
f
from 1 to 5 Hz) the spectral density is computed:
22
Re Im
2ff
f
ST
+
=
Power refers to the fact that the magnitude of the PSD is the mean-square value of the signal being
analyzed. It does not refer to the physical quantity power (as in watts or horsepower). But since power is
proportional to the mean-square value of some quantity (such as the square of current or voltage in an
electrical circuit), the mean-square value of any quantity has become known as the power of that quantity.
Spectral refers to the fact that the PSD is a function of frequency. The PSD represents the distribution of a
signal over a spectrum of frequencies just like a rainbow represents the distribution of light over a
spectrum of wavelengths (or colors).
Density refers to the fact that the magnitude of the PSD is normalized to a single hertz bandwidth. For
example, with a signal measuring acceleration in units of G’s, the PSD has units of G2/Hz.
Since the name PSD does not include the quantity being measured, the word power is sometimes replaced
by the name of the quantity being measured. For example, the PSD of an acceleration signal is sometimes
referred to as the Acceleration Spectral Density. [1]

Revision 08.1. Date 20190218 14
Graph of power spectral density
Implementation of the source signal with random duration (i.e. its deviation is not decreased with
increasing of T) means that it's statistically unstable. Therefore, the device utilizes low-pass filter on
obtained current values of
f
S
.
Observed max level of
f
S
(power spectral density) is an estimate of the vibration magnitude.

Revision 08.1. Date 20190218 15
12. Status Check by Gesture Feature
Gesture feature can be performed as follows:
•Flip the device upside-down and then back, with holding device in a flipped position for at least 1
second.
•Wait about one second.
•Repeat same rotation, i.e. gesture is done twice.
Overall this double gesture should be performed within a total of 5 seconds; otherwise, it is ignored
by the device.
If the device is active, after gesture is detected, it will show the LED "rainbow" - sequentially
glowing green - yellow - red - yellow - green in cycle, for 5 seconds. Then the LED goes off.
This gesture is limited to flipping/rotation of the device only. The device will not react to shaking,
vibration, or shock.
Illustration of Gesture Feature
LED will show “rainbow” if the device is active.
If the device is not active, there will be no LED reaction to the gesture.
1.) Flip upside-down
2.) Hold in this position
at least 1 second.
3.) Flip back to initial
position. Repeat
gesture two times

Revision 08.1. Date 20190218 16
FCC Information
Equipment:
VITT-4G-NA-LT (APT-9600)
Trademark(s) and Model(s):
Kirsen Technologies Inc.
Manufacturer:
Kirsen Technologies Inc.
FCC ID in case other parts of this
equipment are subject to certification:
0028198505
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
The following test reports are subject to this declaration:
XPYTOBYL201
Note: This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to
radio communications. Operation of this equipment in a residential area may cause harmful
interference in which case the user will be required to correct the interference at his own expense.
References
[1] PSD. http://www.vibrationresearch.com