Reliance 57C435工控设备
如果显示的电桥电流未设置为所需值，使用和按钮升高或降低指示的电桥电流读数直到所需显示值。
注：1.仅限配置上限内的电桥电流值并且可以设置下限值。
2.按下按钮将取消显示的电流而不改变存储值。
（5） 按下按钮以永久设置新的电桥电流。
选定的控制卡将自动恢复正常
选定状态。零信号校准
要选择归零操作，请按以下步骤进行：
（1） 将工程钥匙插入工程卡前面板插座并检查解锁的LED（）是否点亮。
（2） 按住所需的控制卡复位/选择按钮约1.5秒，并检查所选
控制卡通过显示select（选择）来表示已选择偶像
（3） 按下工程卡零点按钮和工程
卡将自动禁止所选控制卡
以防止：正在生成错误警报。以下显示之一将是：
显示在所选控制信息显示屏上：
a、 指示稳定的气体读数。
b、 A A表示气体读数上升。
c、 V V V表示气体读数下降。
（4） 检查所选控制卡数字显示和条形图继续显示当前传感器信号数量
注意：在此阶段按下按钮将返回将控制卡切换到所选模式，无任何更改为原始零读数。
（5） 确保所选通道传感器处于无气体环境中。如果要求应用零气体，通常为不含气体的空气
根据所选的流量和时间进行测量通道传感器说明手册。（6） 当信息显示时，表示稳定阅读，按下按钮。所选控制卡将在信息显示屏上显示oooo
而控制卡执行以下操作：
a、 如果电流传感器信号在配置的零信号上限值和下限值。这个然后，控制卡将自动返回到所选的正常状态 状态
b、 如果信号超出存储的信号限制，将显示错误消息将显示在所选控制卡显示器上。
c、 自动返回到正常的选定状态，但是控制卡上的抑制将保持激活状态。
（8） 如果量程信号校准（第9节）不遵循该程序，移除抑制。
If the displayed bridge current is not set to the required
value, use the and push-buttons to raise or lower
the indicated bridge current reading until the required
value is displayed.
Note: 1. Only bridge current values that are within the configured upper
and lower limit values can be set.
2. Pressing the push-button will cancel the displayed current
without alteration to the stored value.
(5) Push the push-button to permanently set the new bridge current.
The selected control card will then automatically return to the normal
selected state.ZERO SIGNAL CALIBRATION
To select the zero operation, proceed as follows:
(1) Plug the Engineering Key into the Engineering Card front panel
socket and check that the Unlocked LED ( ) is illuminated.
(2) Push and hold the required control card RESET/SELECT pushbutton for approximately 1.5 seconds and check that the selected
control card indicates it has been selected by displaying the select
icon.
(3) Push the Engineering Card ZERO push-button and the Engineering
Card will automatically inhibit the selected control card to prevent
false alarms being generated. One of the following displays will be
shown on the selected control message display:
a. Indicates a stable gas reading.
b. A A A A Indicates a rising gas reading.
c. V V V V Indicates a falling gas reading.
(4) Check that the selected control card digital display and
bar graph continue to display the current sensor signal
level.
Note: Pushing the push-button at this stage will return
the control card to the selected mode without any
changes to the original zero reading.
(5) Ensure the selected channel sensor is in a gas free atmosphere. If
required apply zero gas, normally air not containing the gas to be
measured, at the flow rate and for a time according to the selected
channels sensor instruction manual.
(6) When the message display shows , to indicate a stable
reading, push the push-button. The selected control card will display oooo on the message display
while the Control Card carries out the following:
a. Zeroes itself at the current sensor signal, providing this is within
the configured upper and lower zero signal limit values. The
control card will then automatically return to the normal selected
state.
b. If the signal is outside the stored signal limits an error message
will be displayed on the selected control card display.
c. Automatically return to the normal selected state, however, the
inhibit on the control card will remain active.
(8) If the Span Signal Calibration (Section 9) is not to follow this procedure,
remove the inhibit.
