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...10 PROGRAMMING
...10.1.1 Access to Secure Parameters
Continued from previous page
A1 Setpoint
A2 Action
EA
EB
A2 Setpoint
RTX Type
4-20
0-20
0-10
Test Retrans.
(%)
100.0
75.0
50.0
25.0
0.0
Range
85%-100%
80%-100%
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xxxxx
Alter Sec. Code
ELECTRICAL CAL
30
UPPER DISPLAY
Alarm 1 Set Point
The Alarm 1 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.
Alarm 2 Action
Repeat as for Alarm 1 Action above.
Alarm 2 Set Point
Repeat as for Alarm 1 Set Point above.
The decimal point position is set automatically. The alarm LEDs are illuminated in the alarm
condition.
Retransmission Output Type
The retransmission output is assigned to the hydrogen purity range.
Select the retransmission output current range required (4 to 20 mA , 0 to 20 mA or 0 to
10 mA).
Test Retransmission Output
The instrument automatically 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 of 0 to 20 mA and 50% retransmission test signal, 10 mA is
transmitted.
Select the required retransmission test signal.
Ranges:
4689 500/501
4689 500/503
Alter Security Code
Set the security code to a value between 00000 and 19999.
Advance to Electrical Calibration Page.
100–85% and 100–80%
85–100% and 80–100%
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