Instructions

UM-0085-B09 DT80 Range User Manual Page 294
RG
The following tables show the equivalent data for the "low power" DT80 models
Scan rate
0 analog channels
5 analog channels
30 analog channels
300 analog channels
continuous
1300 mW
2020 mW
2000 mW
2000 mW
1 sec
370 mW
720 mW
2000 mW
2000 mW
5 sec 200 mW 280 mW 630 mW 2000 mW
10 sec
100 mW
150 mW
320 mW
2000 mW
1 min 25 mW 35 mW 65 mW 380 mW
10 min
12 mW
12 mW
15 mW
50 mW
1 hour
10 mW
10 mW
11 mW
17 mW
10 hour and above
10 mW
10 mW
10 mW
10 mW
Table 14: DT82E/ 80L/ 80GL/ 85L/ 85GL core hardware average power consumption (external 12V power)
Scan rate
0 analog channels
5 analog channels
30 analog channels
300 analog channels
continuous
1400 mW
2300 mW
2300 mW
2300 mW
1 sec 420 mW 820 mW 2300 mW 2300 mW
5 sec
220 mW
320 mW
720 mW
2300 mW
10 sec 120 mW 170 mW 370 mW 2300 mW
1 min
35 mW
45 mW
80 mW
440 mW
10 min
21 mW
22 mW
26 mW
65 mW
1 hour 20 mW 20 mW 21 mW 27 mW
10 hour and above
20 mW
20 mW
20 mW
20 mW
Table 15: DT82E/ 80L/ 80GL/ 85L/ 85GL core hardware average power consumption (external 24V power)
Note that:
• At slow scan rates the logger spends nearly all of its time asleep, so the average power consumption is
determined solely by the core hardware's sleep mode power consumption, which is fixed.
• If sleep is disabled, then for slow scan rates the core hardware power consumption will approach the "idle"
power state value (300/ 500/ 700 mW for 6/ 12/ 24 V supply, or 350/ 400mW for 12/ 24V supply for low power
models)
• For a continuous schedule, the "30 analog channels" case actually uses slightly less power than the "5 analog
channels" case. This is because a greater proportion of the time is spent with the processor idle, waiting for the
analog sampling to complete.
• These tables assume that the schedule contains only analog channels. Digital channels can usually be
disregarded, but if there are a significant number of calculations being done then the average power
consumption will increase. If any very time consuming operations are performed (e.g. reading SDI-12 sensors)
then these tables are no longer applicable. Refer to Example 3 (P296) for more information.
• A measurement made using a CEM20 channel takes approximately twice as long as a DT80 channel. Thus if
15 CEM20 channels are sampled, you should use the values in the "30 analog channels" column above. See
Example 4 (P296).
For example, if 10 analog channels are being sampled once per minute then interpolating from Table 12 the core
hardware will draw an average of approximately 100 mW from a 12V external supply (although from Table 10 the peak
demand may be up to 1800 mW).