Rosemount 1151DP - User Manual

Questions and Answers

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Joseph SantiagoAug 3, 2025
What to do if my Rosemount 1151DP transmitter does not communicate with the HART Communicator?
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  Timothy LynchAug 3, 2025
  First, check the loop wiring to ensure a minimum of 250 Ω resistance between the power supply and the communicator connection, and that the transmitter receives adequate voltage (minimum 17 volts if the communicator and 250 Ω resistance are properly in the loop). Also, inspect for intermittent shorts, open circuits, and multiple grounds. Specify the transmitter by tag number. If using an I.S. Barrier, refer to its documentation for troubleshooting steps.
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tracy47Aug 11, 2025
Why is the output of my Rosemount 1151DP Measuring Instruments high?
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  Brad HoganAug 11, 2025
  A high output could stem from several causes: * Restrictions, leaks, or blockages in the primary element impulse piping. * Blocking valves not fully open. * Entrapped gas in liquid lines or liquid in dry lines. * Changes in the density of fluid in impulse lines. * Sediment in transmitter process flanges. Additionally, verify the power supply output voltage at the transmitter is within 12 to 45 V dc. Connect the HART Communicator and enter the XMTR TEST mode to determine any electronic failures, ensuring post connectors are clean. If the issue persists, the sensing element may be defective, indicated by obvious defects, such as a punctured isolating diaphragm or fill fluid loss.
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jacksondebraAug 17, 2025
What to do if my Rosemount 1151DP output is erratic?
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  Kimberly SmithAug 17, 2025
  An erratic output from your measuring instrument can be caused by several factors. Check the loop wiring for adequate voltage (12-45 V dc with no load), intermittent shorts, open circuits, and multiple grounds. Avoid using over 45 volts, as this may damage the transmitter electronics. If process pulsation is the cause, adjust the electronic damping using the HART Communicator. Also, connect the communicator and perform a transmitter test to identify any electronic failures, ensuring the post connectors are clean. Finally, inspect the impulse piping for entrapped gas in liquid lines or liquid in dry lines.
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Steve MurphyNov 23, 2025
Why doesn't my Rosemount Measuring Instruments transmitter characterize properly?
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  Seth HillNov 23, 2025
  A transmitter that doesn't characterize properly can be due to several factors. Start by checking the pressure source for restrictions or leaks, proper leveling or zeroing, and ensure the weights/gauge are set correctly. Verify the pressure source's accuracy, ensuring it's at least three times more accurate than the Rosemount 1151 Smart. Next, confirm the mA meter is functioning correctly. Also, check the power supply output voltage at the transmitter, ensuring it's 12 to 45 V dc with no load, and verify a minimum of 250 Ω resistance between the HART Communicator and the power supply. Connect the communicator and perform a transmitter test to identify any electronic failures, ensuring the post connectors are clean. If the electronics are still suspect, consider substituting them with new o...

Summary

Installation

Safety Messages

Crucial safety information and warnings for installation procedures.

Mounting and Process Connections

Details on how and where to mount the transmitter and process connection types.

Electrical Considerations and Wiring

Covers power supply, conduit, and wiring requirements for the transmitter.

Grounding and Hazardous Locations

Important information for safety and proper operation in specific environments.

Liquid Level Measurement

Configuration

Commissioning and Bench Setup

Initial setup and testing before field installation.

Setting Hardware Switches

HART Communication and Hook-up

Connecting and using a HART communicator for setup.

HART Communicator Menu Tree

Navigation guide for the HART communicator interface.

Testing and Verification

Common Configuration Functions

Reranging and Output Type

Operation and Maintenance

Smart Calibration Procedures

Detailed calibration procedures for smart transmitters.

Analog Calibration Procedures

Detailed calibration procedures for analog transmitters.

Sensor Trim and Digital Trim

Adjusting sensor characteristics for accuracy.

Zero and Span Adjustments

Linearity and Damping Adjustments

Troubleshooting

Smart Troubleshooting Guide

Diagnosing issues with smart transmitters.

Analog Troubleshooting Guide

Diagnosing issues with analog transmitters.

Disassembly and Reassembly Procedures

Sensor Module Checkout

Retrofitting the Rosemount 1151 Transmitter

Retrofitting Process Overview

Removing Analog Electronics

Installing Smart Retrofit Kit

Transmitter Characterization

Final calibration step after retrofitting for optimal performance.

Rosemount 1151DP Specifications

General

Type	Differential Pressure Transmitter
Ambient Temperature Limits	-40 to 185°F (-40 to 85°C)
Operating Temperature	-40 to 185°F (-40 to 85°C)
Storage Temperature	-40 to 185°F (-40 to 85°C)
Service	Liquid, gas, or steam
Output Signal	4-20 mA DC
Accuracy	±0.075% of span
Process Connection	1/4" NPT, 1/2" NPT
Process Temperature Limits	-40 to 250°F (-40 to 121°C)
Housing Material	Aluminum
Power Supply	12-45 VDC
Electrical Connection	1/2" NPT
Relative Humidity	0 to 100%
Mounting	Pipe or surface mounting