ABB AK101 - Page 40

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Relay Action EA
EB
Alarm Set Point
RTX Type 4-20
0-20
0-10
Test Retrans (%)
Alter Sec. Code
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100.0
75.0
50.0
25.0
0.0
noitcAmralA
noitcADEL
tupnIrof
tnioPteSevobA
noitcADEL
tupnIrof
tnioPteSwoleB
noitcAyaleR
tupnIrof
tnioPteSevobA
noitcAyaleR
tupnIrof
tnioPteSwoleB
BE NOFFOdezigrene-eDdezigrenE
AE FFONOdezigrenEdezigrene-eD
Purge Gas Relay Action
For 'Fail-Safe' alarm operation the relay's alarm state must be the same as the power-
down state, i.e. the relay is de-energized.
For high alarm operation the relay must be Energized Below the alarm set point (EB).
For low alarm operation the relay must be Energized Above the alarm set point (EA).
The alarm LEDs are illuminated in the alarm condition.
Select the required alarm action from the following table:
The set point band is defined as the actual value of the set point  1% of the set point
value. Alarm action occurs if the input value is above or below the set point band. If the
input moves within the set point band the last alarm action is maintained.
Purge Gas Alarm Set Point
The alarm set point can be set to any value within the input range being displayed. The
set point value is subject to hysteresis within the set point band as detailed above.
Set the alarm set point to the required value.
Advance to next parameter
Retransmission Output Type
The retransmission output is assigned to the purge gas concentration.
Select the retransmission output current range required (4 to 20mA, 0 to 20mA or
0 to 10mA).
Advance to next parameter
Test Retransmission Output
The instrument transmits a test signal of 0, 25, 50, 75 or 100% of the retransmission
range. The % test signal selected is shown on the upper line of the display.
Example – for the range 0 to 20mA and 50% retransmission test signal, 10mA is
transmitted.
Select the required retransmission test signal.
Advance to next parameter
Alter Security Code
Set the security code to a value between 00000 and 19999.
This value will then have to be entered to regain access to the secure parameters.
Advance to Electrical Calibration Page.
…10.2.3 Set Up Outputs Page (LOWER DISPLAY) – AK101 only
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