Reference Manual
00809-0100-4148, Rev BA
July 2010
A-1
Rosemount 148
Appendix A
Specifications
Transmitter Specifications . . . . . . . . . . . . . . . . . . . . . . . . . page A-1
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-6
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-8
TRANSMITTER
SPECIFICATIONS
Functional
Specifications
Inputs
User-selectable. See “Transmitter Accuracy and Ambient Temperature Effect”
on * for sensor options.
Outputs
2-wire 4–20 mA, linear with temperature or input.
Isolation
Input/output isolation tested to 500 V AC rms (707 V DC) at 50/60 Hz.
Power Supply
An external power supply is required. The transmitter operates on 12.0 to
42.4 V DC transmitter terminal voltage.
Humidity Limits
0 - 95% relative humidity, non-condensing
NAMUR Recommendations
The Rosemount 148 meets the following NAMUR recommendations:
• NE 21 - Electromagnetic compatibility (EMC) for Process and
Laboratory Apparatus
• NE 43 - Standard of the signal level breakdown information of digital
transmitters
Transient Protection
The optional Rosemount 470 prevents damage from transients induced by
lightening, welding, heavy electrical equipment, or switch gears. Refer to the
Rosemount 470 Product Data Sheet (Document Number 00813-0100-4191)
for more information.