SSI A20829, Operation Manual, Page: 24 / 38

Single Gas Sensor Module (SGSM)
Operations Manual
Super Systems Inc. Page 24 of 38 Page 24 of 51

DA: Calculated percent dissocation based on %H
2
reading and gas flows. Its full range
scale is defined as 0 – 100.

NH3: Percent ammonia calculation based on the %H
2
reading and gas flows. Its full
range scale is defined as 0 – 100.

KN: Calculated “super “ nitriding potential based on the %H
2
reading and gas flows. Its
calculated range shown on the Main webpage is 0 – 300, but the output range is limited
to a range of 0 – 100 where 0/4 mA is 0 Kn and 20 mA is 100 Kn. It displayed as “Super
KN” on the Main & SSi Configuration webpages.

External: Used to verify the output and for special case scenarios – see below.

Std. KN: Calculated nitriding potential based on the %H
2
reading and gas flows. Its
calculated range shown on the Main webpage is 0 – 300, but the output range is limited
to a range of 0 – 100 where 0/4 mA is 0 Kn and 20 mA is 100 Kn. It displayed as “Std.
KN” on the Main & SSi Configuration webpages.

O2: Percent oxygen reading for the sensor.
When an option is selected, the user can choose a 0 – 20 mA or 4 – 20 mA output range for that
option’s calibration range.
The “External” option is for special cases where an additional analog output is required from an
external source. Contact SSi for additional details about this option.
The Output Configuration screen allows you to adjust output parameters for loops 1 and 2.
For each loop, the following parameters can be adjusted:
• Source: A selected source: H2, DA, NH3, KN, External, or Standard KN.
• Zero (%): Is the selected source’s minimum calibrated zero value that corresponds to 4
mA on a 4-20 mA scale. (4-20 mA is the default Range setting. If Range is set to 0-20
mA, then the Zero % refers to 0 mA.).
• Span (%): Is the selected source’s maximum calibrated span value that corresponds to
20 mA on a 4-20 mA scale. (4-20 mA is the default Range setting. If Range is set to 0-20
mA, then the Span % still refers to 20 mA.).
• Range: Allows the user to choose between an output signal of 4-20 mA (default) and 0-20
mA.
• Manual (%): Allows the user to enter an output value to test the analog output. In order
for this option to function, Source must be set to
External
.
Use the applicable “Set” button to set each parameter (for example, use “Set Source” to set the
source).