ALL-TEST PRO ATPOL II, Руководство пользователя

Страница: 49 / 109

49
occurred, estimates can be prepared for how many cycles occur per hour, per day, or per week. These
measures can be helpful in determining problems with control of a system (such as thermostat
problems).
Duty Cycle / Power Cycle Measurements in ATPOL II
If power consumption is being monitored, the percent of the time that current is flowing in phase 1 is
displayed by pressing [On/Off Cycles]. The average "on" time and the average "off" time are
displayed by repeatedly pressing [More...]. For instance, if you are monitoring a refrigeration unit,
press [On/Off Cycles] to display how much of the time the compressor is running and then press
[More...] to display how long the compressor runs on average.
The level of current considered to be "on" is easily set by the user. It is a function accessed through
the [Setup] key. Using this feature, a user could define 2 amps as "on" (and hence anything less than 2
amps as "off"). This would allow minor currents to flow in a circuit without affecting the duty cycle
measurement. ATPOL II comes from the factory with the "on" current set to 1 amp.
If power consumption is being monitored, the number of times that current in phase 1 goes "on" is
displayed by pressing [On/Off Cycles] once or twice. Based on the history of monitoring consumption,
estimates of the rate of on/off cycles are calculated each second. These estimates are available by
repeatedly pressing [More...] after displaying the total number of power cycles.
For instance, if you are monitoring an air conditioning system and wish to know how many times per
hour the unit turns on and off, press: [On/Off Cycles] until the number of power cycles during
monitoring is displayed and then [More...] to display power cycles per hour.
Time and Capacity Measurements
ATPOL II performs the following time and capacity measurements:

present time and date

time capacity of consumption log

elapsed time of monitoring

time remaining to fill consumption log

record capacity of log

number of records used in log

time and date that monitoring started

programmed start time and date of monitoring

programmed stop time and date of monitoring
The present time and date is the time and date of the clock inside ATPOL II used for creating
timestamps for the records of the log and for dating waveform sets that are saved. It can be changed
as one of the administrative functions (see the
Administrative Functions section).
The time capacity of the log is how much time it will take to fill the consumption log. This is under your
control by changing the variables selected to be recorded using the Data Setup feature of PSM (see the
Setting Measurement Types section). The time capacity of swell/dip and high-speed transient logs is
determined solely by how quickly events occur.
The elapsed time of monitoring is how long the unit has been monitoring. Generally, this is how much
time is recorded in the log. If the log fills up and logging continues, writing over the oldest data, the
elapsed time keeps increasing even though the logged time quits increasing. This means that the