MESSKO D1272AT User Manual

BA 2082/02/10 5
2.2 输入
Pt100 或 4-20 mA 信号可根据设备设计（参考铭牌）与
D1272AT 的输入端连接。
监测输入范围，如果出现错误，显示以下消息：
• 输入传感器故障或者未连接。
• 输入范围降低至（下限）以下。
• 输入范围超出（上限）。
4-20 mA 输入端可与有源或无源信号结合使用。
有源信号：传感器/信号转换器已经通电，不需要任何额
外的外部电源（例如油位显示器 MTO/TT 或温度变送器
TT-PWM60）。
无源信号：传感器/信号转换器需要外部电源（例如指针
温度计MT-ST160SK/TT）。
2.3 偏移调节
偏移调节可用于更改显示值（参考章节 2.1）。相应地修
改模拟输出，并用校正的值激活报警触点。
2.4 最小/最大内存
上一次重置被存储之后，出现最小和最大测量值。可用
正面的键调用。参见章节 2.1。
2.5报警触点ALM1和ALM2（可选）
可选择为数字指示器 D1272AT 装配双继电器（参考铭
牌）。2 个常开触点的开关点可设为不同的限值，并且
可用于生成报警消息或类似信息。超出设定限值时，
特定的触点关闭（报警 1 或报警 2），并且相关状态
LED（ALM1 和 ALM2）闪烁。继电器在背面连接。参
见章节 4.3。
限值可按照章节 2.1 所述进行设置。
返回控制滞后为 1 K。
2.2 Input
A Pt100 or 4-20 mA signal can be connected to the input of
the D1272AT in accordance with the device design (refer to
nameplate).
The input range is monitored and, in case of error, the follow-
ing messages are displayed:
• The input sensor is defective or not
connected.
• The input range has fallen below (Low).
• The input range has been exceeded (High).
The 4-20 mA input can be used with an active or a passive
signal.
Active signal: The sensor/signal transducer is already powered
and does not require any additional external power source
(e.g., oil level indicator MTO/TT or temperature transmitter
TT-PWM60).
Passive signal: The sensor/signal transducer requires an
external power source (e.g., pointer thermometer
MT-ST160SK/TT).
2.3 Oset adjustment
The oset adjustment can be used to change the display value
by a certain value (refer to chapter 2.1). The analog output
is modied accordingly and the alarm contacts are activated
with the corrected value.
2.4 Min-/Max-memory
The minimum and maximum measured value occurring since
the last reset are stored. They can be called with keys on the
front. See chap. 2.1.
2.5 Alarm contacts ALM1 and ALM2 (optional)
The digital indicator D1272AT can be optionally equipped with
a double relay (refer to nameplate). The switching points of the
2 N/O contacts can be set to dierent limit values and can be
used to generate an alarm message or similar. When the set
limit value is exceeded, the particular contact closes (alarm1
or alarm2) and the related status LED (ALM1 and ALM2)
ashes. The relays are connected on the back. See chap. 4.3.
The limit values can be set as described in chap. 2.1.
The return control hysteresis is 1 K.
2 产品规格/Product Specication

MESSKO D1272AT Specifications

General

Brand	MESSKO
Model	D1272AT
Category	Measuring Instruments
Language	English