Opticon Sensors Europe BV EE150 Manual Do Utilizador
EE-150
V-0.1
9
6 Electrical Specifications
6.1 Electrical Characteristics
Conditions: Operating voltage 3.0V unless otherwise specified
The ESL is in sleep mode almost the entire time. The device wakes up at regular intervals
(called the poll time) and it then transmits a poll request to the base station. When the base
station has no data to send, it acknowledges the poll after which the ESL immediately goes
back to sleep. The minimum poll rate is configurable and is set to 20 seconds by default. A
higher poll rate will decrease the power consumption but will increase the response time.
6.2 Battery
The power is supplied to the ESL by 1 CR2450 battery:
• Nominal capacity: 600 mAh
• Nominal voltage: 3.0 V.
• Maximum self-discharge rate: <1% per year
• Battery life: 4 years minimum (Update frequency: 4 times per day, poll time 20 seconds). A
more detailed set of conditions is listed in the table below.
The battery life is made up of several factors. During transmission e.g. the current consumption
is much higher than when the ESL is ‘sleeping. The table below shows the various factors that
make up the entire current consumption, plus the conditions under which the lifetime calculation
was done.
• Nominal capacity: 600 mAh
• Nominal voltage: 3.0 V.
• Maximum self-discharge rate: <1% per year
• Battery life: 4 years minimum (Update frequency: 4 times per day, poll time 20 seconds). A
more detailed set of conditions is listed in the table below.
The battery life is made up of several factors. During transmission e.g. the current consumption
is much higher than when the ESL is ‘sleeping. The table below shows the various factors that
make up the entire current consumption, plus the conditions under which the lifetime calculation
was done.
Factor
Conditions
Correlation * Influence **
Data communication
Poll interval: 20 seconds
Retransmissions: 10%
Report ratio: 1 to 39
Retransmissions: 10%
Report ratio: 1 to 39
Yes
No
Yes
No
Yes
61%
Display updates
4 updates per day
Temperature: 15~25° C
Temperature: 15~25° C
No
Yes
Yes
20%
No connection with base station
(Out of range or base station off)
(Out of range or base station off)
Not connected: 2%
Number of channels: 5
Number of channels: 5
No
No
No
4%
Sleep time
99,9%
Yes
9%
Battery self-discharge
1 % / year
No
6%
* The correlation shows whether increasing the listed value under ‘Conditions’ increases (Yes)
or decreases (No) the battery life of the EE-150.
** The influence shows the percentage of the specified factor on the entire current consumption.
For example:
• Increasing the poll interval improves the battery life
• Turning off the base stations shortens the battery life.
• A lower operating temperature (below 15° C) shortens the battery life.
• More display updates per day shortens the battery life.
Parameter
Typ
Unit
Remarks
Operating voltage
2.3~3.3
V
One CR2540 Lithium primary battery
Sleep current
1
µA
When the transmitter and receiver are idle
Poll time
>= 20
seconds
See below