Campbell Hausfeld CC640 - Manual (Page 35)

Operating Manual
The quiescent power consumption in Amp-Hours is calculated as follows:
P
quiescent
= 250x10 -6 Amps * 24 Hours = 0.006 Amp-Hrs / Day
The operating power usage per picture in Amp-Hours is calculated as follows:
P
operating
= 0.250 Amps * (30Sec. / 3600 Sec./Hr) = 0.00208 Amp-Hrs / Picture
The daily power usage will depend on the number of pictures taken per day. The
power usage can be calculated using the following formula:
P
usage
/ Day = 0.006 Amp-Hrs + (0.00208 Amp-Hrs * Number of Pictures Per Day)
The following table shows the power usage versus the number of pictures taken
per day:
Table 3. Standalone Operation Power Usages
Number of Pictures Per Day Power Usage Per Day
1 (Every 24 Hours) 0.008 Amp-Hrs
4 (Every 6 Hours) 0.014 Amp-Hrs
12 (Every 2 Hours) 0.031 Amp-Hrs
24 (Every 60 minutes) 0.056 Amp-Hrs
48 (Every 30 minutes) 0.106 Amp-Hrs
96 (Every 15 minutes) 0.206 Amp-Hrs
288 (Every 5 minutes) 0.606 Amp-Hrs
1440 (Every minute) 3.006 Amp-Hrs
11.2 Operation with Communications
If the camera is operating in a standalone mode, the time the camera is operational
in this mode is typically 30 seconds. The power calculations are more complicated
when communications are involved, as the amount of time the camera is in
operating mode is increased by the amount of time it takes for the camera to
transfer an image.
The transfer times are influenced by two main factors: the size of the image and
the transfer speed used to send the image. The amount of time the camera is on
will be increased as the size of the image becomes larger or as the communication
rate slows down.
To properly determine the power consumption when using communications, the
additional time the camera stays in operating mode needs to be accounted for. The
following table is a guideline for determining the amount of time it takes to
transfer an image using RS-232 Communications.
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