Auber TD220 사용 설명서 - 페이지 3

{카테고리_이름} Auber TD220에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Auber TD220 4 페이지. Differential temperature controller

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AUBER INSTRUMENTS

Alarm can be cancelled by press V key. The alarm will not turn on until DT re-

enter the alarm zone after it returned to the normal range once. To disable the

alarm, set AH = AL.

The maximum value of the AL can be set is the current value of AH. But AH can

be set to the value between -58 ~ 306ºF or -50 ~ 170ºC. When AH is set to a

value lower than current AL, the AL will be adjusted to the AH value automatically.

For example, when AH = 95.0ºF, AL can be set to any value between -58 and

95.0. For AH, it can be set to any value between -58 and 306. If you set The AH

to 25.0, the AL will be changed to 25.0 automatically.

Note 3. The Cooling Antishort is the delay the time to turn the cooling load on.

when the controller is used for cooling and load is a compressor, it should not

turn on the compressor when it is at high pressure (just after turned off).

Otherwise, It may shorten the life of compressor. The Anti-Short cycle delay

function can be used to prevent the rapid cycling of the compressor. It

establishes the minimum time that the NO contact remains open (after reaching

cutout) before closing again. The delay overrides any Load Demand and does

not allow the NO contacts to close until the set time-delay value has elapsed. It

gives time to release the refrigerant pressure through evaporator. It is typically

set to 4 - 6 (minutes). By default, AS is set to 6 minutes.

Note 4. The SFA defines how the output would be if the sensor fails. It can be

set to 0-0, 0-1 or 1-0. Please refer to table 2 for details.

Table 2. Output of the controller when sensor fails.

SFA

Controller output when sensor fails

0-0

Cooling device off, heating device off

1-0

Cooling device on, heating device off

0-1

Cooling device off, heating device on

For example, when the unit controls a refrigerator for food, you may want to set

SFA to 1-0 if the sensor fails to keep the food cold. When it controls a heater,

you may want to set SFA to 0-0 for safety purpose.

Note 5. The offset is used to set an input offset to compensate the error produced

by the sensor or input signal itself. For example, if sensor 1 displays 37ºF when

the actual temperature is 32ºF, setting parameter 1oF = -5 will make the

controller display 32ºF.

Note 6. The differential mode can be set to 1-2 or 2-1. It defines the how the

value of DT is calculated. For example, 1-2 means DT is equal to the reading of

sensor 1 minus reading of sensor 2.

6. How to install the sensor to the unit.

The connector of sensor contains a slot for fitting pin connection. It also has a

spring lock to prevent disconnections from accidental pulling on the cable.

To install the sensor to the controller: 1) identify the key on the male connector

(Figure 4, a) and the notch on the female connector (Figure 4, b); 2) hold the

tail of the female connector, align the notch and the key, and push the female

connector forward (Figure 4, c). To remove the connector, hold the spring-

loaded collar on the female connector and pull it back. Please see Figure 5.

2017.10

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Figure 4. Install the sensor.

(a)

(b)

(c)

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