Table of Contents
Advertisement
• Computer communication (RS-232).
n
Formula for Determining Battery Life
The following calculation will determine the battery life for UNIDATA
battery packs (Model 6910A):
Life (days) = [ST/(RT+35)] * 3300
ST = Scan Time (seconds)
RT = Run Time (milliseconds)
... where external instrument load does not exceed 20mA.
The run time is determined by examining Address 1 of the PROLOGGER
(Block 0, locations 1 and 2), where the program run time is saved.
6910A battery packs have a maximum life of 3 years.
n
Battery Life Estimation Tables
The following table details the estimated battery life from loggers with
various scan rates and battery types. This table assumes a program run time of
12 milliseconds (approximately 40 instructions).
Scan Rate
0.25
1
5
10
Model 6910A – 10 Ah Alkaline Battery Pack.
Model 6910B – 4 Ah Nickel Cadmium Battery Pack.
4.1.2
Battery Pack Connections
The Model 6910 battery packs are manufactured with a 3-way socket
connector that plugs into the Model 7001 PROLOGGER.
Model 6910B
Life (days)
12
30
40
40
PROLOGGER Hardware
Model6910A
Life (days)
16
66
330
660
POWER SUPPLY 17
Advertisement
Table of Contents
