AUBER INSTRUMENTS
WWW.AUBERINS.COM
2021.09
P8/9
temperature that the controller is capable of reading, or set to “off”. If a relay is
set to process alarm, the value of AL represents the absolute low alarm; the relay
will be activated when PV <= AL. If a relay is set to deviation alarm, the value of
AL represents the temperature deviation below the set value; the relay will be
activated when PV <= (SV- AL).
Tip 1: In Process Alarm Mode, AL should always be less than AH (AL1 < AH1,
AL2 < AH2), otherwise, the alarm relay will stay activated all the time.
Tip 2: A relay can be set to work for process/deviation high alarm only (i.e., set
AL = off), for low alarm only (i.e., set AH = off), or for both high and low alarm.
Tip 3: Deviation alarm settings are not valid for Distilling Mode (on DSPR220 or
DSPR400) where there is no set temperature.
Table 7. Alarm parameters listed in alarm setting menu
Alarm Configuration (Alarm parameters part 2)
Display
Code
Description
Setting Range
Initial
Setting
Remark
AH1
AH1
Alarm 1 high limit
OFF, 1 ~ 9999
OFF
Note 20
AL1
AL1
Alarm 1 low limit
OFF, 1 ~ 9999
OFF
Note 21
HY1
HY1
Alarm 1 hysteresis
band
0.1-100.0
0.3
Note 22
AP1
AP1
Alarm 1 pulse length
1-100
5
Note 23
AEO1
AEo1
Alarm 1 ending option
0, 1, 2
2
Note 24
AH2
AH1
Alarm 2 high limit
OFF, 1 ~ 9999
OFF
Note 20
AL2
AL1
Alarm 2 low limit
OFF, 1 ~ 9999
OFF
Note 21
HY2
HY1
Alarm 2 hysteresis
band
0.1-100.0
0.3
Note 22
AP2
AP1
Alarm 2 pulse length
1-100
5
Note 23
Aeo2
AEo2
Alarm 2 ending option
0, 1, 2
2
Note 24
goto
alam
Knob
ah1
off
Knob
al1
off
Knob
hy1
0
.
3
Knob
ap1
5
Press
Press
Press
Press
Alarm 1
high limit
Alarm 1
low limt
Alarm 1
pulse length
pulse
80
100
Knob
ap2
5
Knob
hy2
0
.
3
Knob
al2
off
Knob
aeo2
2
Press
Press
Press
Press
Alarm 2
low limt
high
End
Knob
aeo1
2
Press
Knob
ah2
off
Press
Alarm 2 high
limit
Knob Press
Alarm 1
ending option
Alarm 2
ending option
Alarm 2
pulse length
Alarm 1
hysteresis
band
Alarm 2
hysteresis
band
Figure 9. Flow chart of setting alarm parameters
Note 22. HY (Hysteresis Band),
determines the hysteresis band between
temperature of activating and deactivating alarms. It is also called differential
band by some manufacturer. The unit is degree F or C. For example, Relay 1 is
set as a non-latching process alarm with relays settings RL1 = Pr, Lgc1 = RL_C,
LAt1 = N, AH1 = 200, AL1 = 100 and HY = 3 (temperature unit is F). For the high
limit alarm, when the process temperature is greater and equal to 200˚F, the
relay will pull in; and when process temperature is less than 197˚F, relay
will drop
off. For the low limit alarm, relay will pull in when process temperature is less
than 100˚F; and the relay will drop off when process temperature is greater or
equal to 103˚F.
Note 23. AP (Alarm Pulse),
determines the time duration of which a relay stays
activated. The unit is second. Pulse length can be set from 1 to 100 seconds.
This setting is only valid when the Relay Latching Mode is set to Pulsing, i.e.,
LAt = P.
Note 24. AEO (Alarm Ending Option),
determines the alarm relay status when
timer is ended. (The top display will switch between the current temperature and
“
End
” alternately.) AEO1 is for alarm relay 1 and AEO2 is for alarm relay 2.
AEO parameter can be set to 0, 1 and 2. If AEO = 0 and timer is ended, there is
no status change on that specific relay output; if AEO = 1 and timer is ended,
that specific relay output will be reset to the initial status automatically; If AEO =
2 and timer is ended, user needs to manually press the front key A/key B to reset
that alarm 1/alarm 2 to the initial status. For example, if AEO1 = 2 and timer is
ended, push front key A to reset alarm 1; if AEO2 = 2 and timer is ended, push
front key A to reset alarm 2.
8.
Application Examples:
8.1
Example for alcohol distilling
Set the high power accelerated heating limit to 170.0° F (76.7° C) and power
output to be at 100% of the element capacity, set distilling power at 30%. Set the
foreshots/heads alarm at 172° F. Set the distillation ending criterial to be either
when temperature rise to 200.0 ° F or when the time is more than 3 hours. When
the controller is powered up, it will heat the wash with full power. After the wash
temperature reaches 170° F, the power is automatically reduced to 30%. When
temperature reaches 172° F, the alarm will beep four times to notify the operator
that temperature is close to the alcohol boil temperature so that he can remove
the heads. Soon the temperature rise to 173.0° F, the timer is activated. After
distilling for a while the content of alcohol is depleted and temperature starts to
rise. Once the temperature reaches 200.0° F, the heater is turned off and the
controller will send long beeps and flashing "End" on the display. if the
temperature does not rise to 200.0° F after 3 hours, the heater will also be turned
off. During the distillation, the user can use the rotary knob to fine tune the boil
at any time. The figure below shows how the power is correlated to the
temperature and time.
Figure 10. Example for alcohol distilling (Power output correction with
temperature and time.) Setting: dAST=170, dOUT=100, dt=3:00, dFSP=200.0,
dALH=172.0 dtSP=173, tF=ON, FF=ON, dEO=OFF. Dial=P30.
