ADS Environmental Services IETG FlowHawk QR 775012 A4 - Manual (Page 348)

Specifications A-3
• The log rate determines the number of readings taken per day.
At a 15-minute sample rate, the monitor will record 96 readings
a day for a single entity. At a 2-minute sample rate, the
monitor will record 720 readings a day for a single entity.
• One entity reading consumes 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 one reading. Therefore, each total below
represents the actual entities plus one date/time stamp. A
date/time stamp must be included for each monitoring point
associated with the monitor.
Peak
Combo
Sensor
Surface
Combo
Sensor
Ultrasonic
Depth
Sensor
Ultrasonic
Depth Sensor
with Pressure
Option
Slimline
Peak
Combo
Sensor
7 6 3 4 6
• Deduct 1 to 2 days from every 25 days from the total days of
storage to compensate for additional overhead in memory.
Following is the equation for calculating the total days of storage
available in the monitor memory:
Data Storage Available in the Monitor (in Bytes)
=
Total Days of
Storage in
the Monitor
Memory
Number of
Readings
Taken per
Day for
One entity
X
Memory
Consumed for
One Entity
Reading
(Date/Time
Stamp)
X
Number of
Entities Logged
by the Monitor
(based on the
selected
devices)
For example, recording data at a 2-minute sample rate using a Peak
Combo Sensor offers approximately 20 days of data storage.
851,968 bytes
= 21 days (20 when
accounting for
overhead)
720 readings X 8 bytes X 7 entities (including
1 for the date/ time
stamp)