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Alarm_1_Low The lower limit of the concentration alert for the parameter assigned to Alarm_1_Flag. If
the system value linked to the alarm falls below this value, the alert will be activated.
Alarm_2_Low The lower limit of the concentration alert for the parameter assigned to Alarm_2_Flag. If
the system value linked to the alarm falls below this value, the alert will be activated.
Max_Cal_Err Maximum allowable deviation between actual and calculated moisture generator values.
The value entered here is a percentage of new span value. If the new (calculated) value for
span exceeds this limit, the system alarm will be activated.
Max_Zero_Err Maximum allowable deviation of
on the new coefficient D value. If the new (calculated) value for coefficient D exceeds this
limit, the system alarm will be activated.
Max_Span Maximum allowable cell span (Moist_Span). The value entered here is essentially a cor-
rection factor, no units are associated with it. If the new (calculated) value for span exceeds
this limit, the system alarm will be activated.
Max_Zero Maximum allowable coefficient D in Hz. If the new (calculated) value for coefficient D
exceeds this limit, the system alarm will be activated.
Analog Ranges
Analog output 1 has two fully programmable ranges and output 2 has one range. Upper ("output") and lower ("off-
set") limits are assigned to the ranges to adjust for desired sensitivity. Range on output 1 can be shifted from low to
high or high to low either manually using the
(Chapter 5): Flags1 for more information on enabling the auto-range function.
Auto-range switches from low to high range when the signal on output 1 is 97% of the upper limit on the low range.
Range will also switch automatically from high to low range when the signal on output 1 is 85% of the upper limit
of the low range.
Range ID Alert
The Range ID contacts open when the channel 1 analog output (4-20 mA) is operating in the higher of its two
output ranges. This signal can be used to alert user recording/acquisition equipment that the channel 1 range has
shifted.
analog range
Example:
Assume that moisture concentration data is linked to the output and the two pro-
grammed ranges are :
When operating in the low range, the range will automatically switch from low to
high range if the signal indicates 48.5 ppm. When operating in the high range, the
range will switch back to the low range when the indicated value falls to 42.5 ppm.
∆
in Hz.
ƒ from zero
button or by using the auto-range function. Refer to
Low:
0 to 50 ppm
High: 25 to 75 ppm
The value entered here is based
Controller Function 4-7
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