Reliance 57C435工控設備
如果顯示的電橋電流未設置為所需值，使用和按鈕升高或降低指示的電橋電流讀數直到所需顯示值。
注：1.僅限配置上限內的電橋電流值并且可以設置下限值。
2.按下按鈕將取消顯示的電流而不改變存儲值。
（5） 按下按鈕以永久設置新的電橋電流。
選定的控制卡將自動(dòng)恢復正常
選定狀態(tài)。零信號校準
要選擇歸零操作，請按以下步驟進(jìn)行：
（1） 將工程鑰匙插入工程卡前面板插座并檢查解鎖的LED（）是否點(diǎn)亮。
（2） 按住所需的控制卡復位/選擇按鈕約1.5秒，并檢查所選
控制卡通過(guò)顯示select（選擇）來(lái)表示已選擇偶像
（3） 按下工程卡零點(diǎn)按鈕和工程
卡將自動(dòng)禁止所選控制卡
以防止：正在生成錯誤警報。以下顯示之一將是：
顯示在所選控制信息顯示屏上：
a、 指示穩定的氣體讀數。
b、 A A表示氣體讀數上升。
c、 V V V表示氣體讀數下降。
（4） 檢查所選控制卡數字顯示和條形圖繼續顯示當前傳感器信號數量
注意：在此階段按下按鈕將返回將控制卡切換到所選模式，無(wú)任何更改為原始零讀數。
（5） 確保所選通道傳感器處于無(wú)氣體環(huán)境中。如果要求應用零氣體，通常為不含氣體的空氣
根據所選的流量和時(shí)間進(jìn)行測量通道傳感器說(shuō)明手冊。（6） 當信息顯示時(shí)，表示穩定閱讀，按下按鈕。所選控制卡將在信息顯示屏上顯示oooo
而控制卡執行以下操作：
a、 如果電流傳感器信號在配置的零信號上限值和下限值。這個(gè)然后，控制卡將自動(dòng)返回到所選的正常狀態(tài) 狀態(tài)
b、 如果信號超出存儲的信號限制，將顯示錯誤消息將顯示在所選控制卡顯示器上。
c、 自動(dòng)返回到正常的選定狀態(tài)，但是控制卡上的抑制將保持激活狀態(tài)。
（8） 如果量程信號校準（第9節）不遵循該程序，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.
