17
Use the values noted to set the remaining program parameters as described below.
8.3 TS: START TIMER
The Ts Start Delay Timer is used to inhibit monitoring during the motor start-up surge.
To determine the appropriate value for Ts, start the motor and observe how long -
seconds - it takes for the HPL110A kW[%] display value to stabilize.
Depress the MODE key to select Start Timer [s] and then use the D, Ñ keys to adjust Ts
value to a duration which is slightly longer than the settling time observed.
Since monitoring is inhibited while Ts is active, always try to set this parameter as low as
possible without generating false alarms.
8.4 MAX. LIMIT TRIP POINT
Using the Peak Detect function, run the system at its minimum load condition and
observe the max. normal reading by depressing the D key.
Set the Max. Limit value a few units higher than this value by depressing the MODE key
to select Max. Limit [%] and then use the D, Ñ keys to adjust.
8.5 MIN. LIMIT TRIP POINT
Again using the Peak Detect function, run the system at its minimum load condition and
observe the min. normal reading by depressing the D key.
Set the Min. Limit value a few units lower than this value by depressing the MODE key
to select Min. Limit [%] and then use the D, Ñ keys to adjust.
8.6 REACTION TIMER SETTING
The HPL110A has independent Reaction Timers for both the Max. Limit alarm and Min.
Limit alarm which delay the alarm response when running outside the programmed limits.
Their purpose is to reduce false alarms due to normal process fluctuations.
Both Reaction Timers should be set to the lowest value which does not result in false
tripping.
The default values of 0.1 sec. will be good starting points for applications requiring rapid
response, e.g. blockage detection on conveyors. For process applications such as pumps
and mixing, longer Tr values - 1 to 2 sec. - will probably be more appropriate.
To set Reaction Time, depress the MODE key to select Reaction Timer [s] and Max. Limit
[%] and then use the D, Ñ keys to adjust for Max. Limit Reaction Time.
Depress the MODE key again to select Reaction Timer [s] and Min. Limit [%] and then
use the D, Ñ keys to adjust for Min. Limit Reaction Time.
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