19
( )
Time
L
h
D
B
=
×
−
+
⎧
⎨
⎪
⎩⎪
⎫
⎬
⎪
⎭⎪
262144
2
VR60 MEMORY (OPTION 03B)
The VR60 memory feature (Option 03B) provides 256K of data storage memory and the firmware
to log data telemetry transmitters. The data logging option is intended to compress and store data
which would normally be written down from the display or printed through the serial port, during
use in the field. The stored data, along with a time record, can later be transferred to a printer or
external computer.
Memory Storage Capacity
It is possible to calculate the amount of data that can be stored before the memory is fills. The
following table lists the number of bytes required for various functions.
MEMORY STORAGE REQUIREMENTS
FUNCTION
DISPLAY
# of BYTES
NOTES
Start decode one
channel transmitter
DECODING TR#xx
FREQ xx.x kHz
5.5
Also saves Parameters such as TEMP (°F),
or PRES (psi).
Start decode two
channel transmitter
DECODING TR#xx
FREQ xx.x kHz
6.5
Also saves Parameters such as TEMP (°F),
or PRES (psi).
Store time at each
reading
xx:xx:xx:xx
2 - 5
Number of bytes depends on amount of
change in time (2 bytes if only seconds
changed, 3 bytes if seconds and minutes
change, 4 bytes if seconds, minutes, and
hours change, etc.)
Store data each
reading
xxxx
Y ÷ 2
where Y = number of digits stored
(including period)
Change frequency
FREQ xx.x kHz
2.5
The time required to fill the memory is calculated using the equation below:
where:
Time = time (in seconds) before memory is full
L = Log Interval in seconds (see Glosary)
h = number of bytes required for header
D = number of digits in transmitted data
B = number of bytes required to store time
