Rosemount Model 1195/ProPlate/Mass ProPlate
5-26
Failure Mode Alarm vs.
Saturation Output Values
The failure mode alarm output levels differ from the output values that
occur when applied pressure is outside the range points. When pressure
is outside the range points, the analog output continues to track the
input pressure until reaching the saturation value listed b
Write Protect
and Alarm Jumpers. elow; the output does not exceed the listed saturation
value regardless of the applied pressure. For example, for pressures
outside the 4–20 range points, the output saturates at 3.9 mA or 20.8
mA. When the transmitter diagnostics detect a failure, the analog
output is set to a specific alarm value that differs from the saturation
value to allow for proper troubleshooting.
NOTE
The preceding output values can be altered by an analog
output trim procedure.
Use the following steps to change the jumper settings:
1. If the transmitter is installed, secure the loop and remove power.
2. Remove the housing cover opposite the field terminal side.
3. Locate the jumper on the output electronics board (see Figure 5-9),
then move the jumper to the desired setting.
4. Reattach the transmitter cover. To avoid condensation, metal to
metal contact is preferred.
5. If the transmitter is installed, reapply power.
Level 4–20 mA Saturation Value 4–20 mA Alarm Value
Low 3.9 mA 3.75 mA
High 20.8 mA 21.75 mA
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