Auber Instruments DSPR300 Manual de instrucciones - Página 8

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goto

alam

Knob

Alarm 1

ah1

high limit

off

Knob

Alarm 1

al1

off

low limt

Knob

Alarm 1

hy1

hysteresis band

0.3

Knob

ap1

Alarm 1 pulse

length

Figure 9. Flow Chart of Setting Alarm Parameters.

Note 17: AH (High Alarm), determines at what temperature that is higher than

the set temperature the alarm relay will be activated. This setting applies to both

process and derivation alarms. The unit is in degree C or F. AH1 is for Relay 1

and AH2 for Relay 2. It can be set to any temperature that the controller is

capable to reading, or set to "off". If a relay is set to process alarm, the value of

AH represents the absolute high alarm; the relay will be activated when PV >=

AH. If a relay is set to deviation alarm, the value of AH represents the

temperature deviation above the set value; the relay will be activated when

PV >= (SV+ AH).

Note 18: AL (Low Alarm), determines at what temperature that is lower than

the set temperature the alarm relay will be activated. This setting applies to both

process and derivation alarms. The unit is in degree C or F. It can be set to any

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 Boiling Mode (on DSPR120 or

DSPR300) where there is no set temperature.

Note 19: 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 20: 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.

2021.05

End

100

Knob

Press

Alarm 2

ap2

pulse length

Press

Knob

Alarm 2

hy2

hysteresis

0.3

band

Press

Knob

Alarm 2

al2

low limt

off

Press

Knob

ah2

Knob Press

off

Alarm 2 high

limit

This setting is only valid when the Relay Latching Mode is set to Pulsing, i.e.,

LAt = P.

Press

8. Application Examples

8.1 Timer operation example

The timer can be used for several ways to help managing mashing or boiling

process.

Press

1) Use it to automatically control the boiling time (boiling mode).

Set the parameter as following

tF=on, btSP=210, tdIr=dn, bEO=OFF, bt=1:30,

Press

The timer will start to count when temperature reaches 210 degrees. The timer

will count down from 1:30, when time out, the controller will stop heating, beeps,

and flash "End".

2) Use the timer as a regular timer (boiling mode).

Press

Set btSP below the ambient temperature so that timer is available, set bt to a

very long time so that it will not end before operator decide to end the boil. The

counting direction should be up. Use the reset button (rSt) to reset the timer at

any time

tF=on, btSP=50, tdIr=up, bEO=on, bt=60:00.

3) Use the timer as a regular timer (mashing mode).

Set tSP below the ambient temperature so that timer is available, set t to a very

long time so that it will not end before operator decide to end the mash. The

counting direction should be up. Use the reset button (rSt) to reset the timer at

any time

tF=on, tSP=50, tdIr=up, EO=on, t=60:00.

4) Use EZboil as a manual regulator (similar to DSPR1)

To use it as manual regulator with temperature reading, please set it to boiling

mode. Disable timer, and set boiling acceleration set temperature below ambient

temperature (or just zero).

Mode=boiling, tF=off, bAST=0

9. Wiring Examples

Example 1. Here are two wiring diagrams of how to connect a DC triggered AC

SSR with this power regulator.

RTD

Figure 10. Wiring examples of controlling a heater with SSR and DSPR300 in a

120VAC system (upper) and in a 240VAC system (lower).

Example 2. Here is the wiring diagram of how to wire an auxiliary heating

element to the controller via a contactor (for acceleration period only).

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SSR

Heater

SSR

Heater

120V AC

240V AC

P8/9