Emerson Rosemount 6888A, Reference Manual

Page: 86 / 136

System Parameters
(continued)
Table 3-1:
Parameter name Unit Description
Alarm Level -- O
2
alarm level
0 = 3.5 mA
1 = 21.1 mA
Cal Gas 1 % Test gas 1 value. This is the actual value of the gas being
applied during the Test Gas 1 phase of a calibration.
Cal Gas 2 % Test gas 2 value. This is the actual value of the gas being
applied during the Test Gas 2 phase of a calibration.
Gas Time sec Test gas application time. This is the length of time test
gases are applied to the O
2
probe during low or high test
gas phase of a calibration.
Purge Time sec Test gas purge time. This is the length of time before the
output will be returned to the process reading after a cali-
bration.
Slope mV/Dec Current calibration slope. This is the slope value that was
calculated as a result of the last successful calibration.
Constant mV Current calibration constant. This is the constant value
that was calculated as a result of the last successful calibra-
tion.
Impedance ohm Cell impedance. This is the sensor resistance that was cal-
culated as a result of the last successful calibration.
Time Days ago Time stamp of the last successful calibration.
Cal Logs | Slope mV/Dec Previous calibration slope. There are ten calibration results.
1
is the most recent, and
10
is the least recent calibration
slope.
Cal Logs | Constant mV Previous calibration constant. There are ten calibration re-
sults.
1
is the most recent, and
10
is the least recent cali-
bration constant.
Cal Logs | Impedance ohm Previous cell impedance. This is the sensor resistance that
was calculated as a result of a previous successful calibra-
tion. There are ten calibration results.
Index 1
is the
most recent, and
Index 10
is the least recent sensor re-
sistance measured.
Cal Logs | Time Days ago Time stamp of the previous successful calibration. There
are ten calibration time stamps.
Index 1
is the most re-
cent, and
Index 10
is the least recent time stamp.
Configuration, startup, and operation
78 Rosemount 6888A