Fisher Weather Radio 244ER User Manual
Rosemount Models 244EH and 244ER PC-Programmable Temperature Transmitters
A-2
Failure Mode
The values that the transmitter drives its output to in failure mode
depend on whether it is factory configured to standard or
NAMUR-compliant operation. The values for standard and
NAMUR-compliant are as follows:
depend on whether it is factory configured to standard or
NAMUR-compliant operation. The values for standard and
NAMUR-compliant are as follows:
Humidity Limits
0 to 99% relative humidity, non-condensing
Turn-on Time
Performance within specifications is less than 5.0 seconds after power
is applied to the transmitter
is applied to the transmitter
Update Time
Approximately 0.5 seconds
Performance
The Models 244EH and 244ER maintain a specification conformance of
at least 3
at least 3
s.
Stability
±0.1% of span or 0.1 °C, whichever is greater, over 12 month period
Power Supply Effect
Less than ±0.005% of span per volt
Vibration Effect
The transmitters tested to the following specifications with no effect on
performance:
performance:
CE Electromagnetic Compatibility Compliance Testing
The Models 244EH and 244ER meet all requirements listed under IEC
61326: Amendment 1, 1998.
61326: Amendment 1, 1998.
TABLE A-1. Operation Parameters
Standard
NAMUR-Compliant
Linear Output:
3.9
≤
I
≤
20.5 mA
3.8
≤
I
≤
20.5 mA
Fail High:
21
≤
I
≤
23 mA (default)
21
≤
I
≤
23 mA (default)
Fail Low:
I
≤
3.75 mA
I
≤
3.6 mA
Frequency
Vibration
10 to 60 Hz
0.21 displacement
60 to 2000 Hz
3 g peak acceleration