Promag 53/83/93 Pulse Output Setting Guide

Overview of Pulse Output Settings

Pulse output is a common signal output method in industrial flowmeters, used to convert flow totalization or instantaneous values into frequency signals for acquisition by PLCs, counters, or remote systems. The Endress+Hauser Promag 53, Promass 83, and Prosonic 93 series transmitters all support pulse output functionality, but the setting steps differ slightly by model. Proper configuration of pulse output ensures accurate transmission of flow data and avoids measurement errors.

The following content introduces the pulse output setting methods for these three instruments step by step, including parameter access, output configuration, wiring, and verification.

Preparation Before Setting

Before starting the setup, ensure that the instrument is properly installed and powered, and is in an operable state. At the same time, you need to prepare the following information:

• Pulse equivalent (volume or mass represented by each pulse, e.g., 1 pulse = 0.1 L)
• Maximum output frequency (must match the receiving device)
• Output mode (active/passive, open collector, etc.)
• Wiring diagram (refer to the manual for the corresponding model)

It is recommended to record the original parameters before setting so that they can be restored if necessary.

Promag 53 Pulse Output Setting Steps

The Promag 53 electromagnetic flowmeter is configured through the local display or FieldCare software. The local operation steps are as follows:

1. Enter the main menu and select "Setup" → "Outputs".
2. Select "Pulse output" and enter the configuration interface.
3. Set the pulse equivalent (Pulse value): enter the volume corresponding to each pulse, for example, 0.1 L/P.
4. Set the pulse width (Pulse width): choose according to the requirements of the receiving device, usually 0.1~100 ms.
5. Set the output mode (Output mode): select "Active" or "Passive".
6. Confirm and save the settings.

Note: The pulse equivalent and pulse width must satisfy the maximum frequency limit; otherwise, the instrument will report an error.

Promass 83 Pulse Output Setting Steps

The pulse output setting of the Promass 83 Coriolis mass flowmeter is similar to that of the Promag 53, but the menu structure is different. The operation is as follows:

1. Press the "E" key to enter the main menu and select "Setup" → "Outputs".
2. Select "Pulse/frequency output" and enter.
3. Select "Operating mode" as "Pulse".
4. Set the pulse equivalent (Pulse value): enter the mass or volume corresponding to each pulse.
5. Set the pulse width (Pulse width): it is recommended to calculate according to the frequency to ensure a suitable duty cycle.
6. Set the output signal: select "Active" or "Passive".
7. Save and exit.

The Promass 83 supports pulse output for mass flow and volume flow, and the measurement variable must be selected according to the application.

Prosonic 93 Pulse Output Setting Steps

The pulse output setting of the Prosonic 93 ultrasonic flowmeter is usually completed through the transmitter menu. The steps are as follows:

1. Enter the main menu and select "Setup" → "Outputs".
2. Select "Pulse output" and enter.
3. Set the pulse equivalent (Pulse value): enter the volume corresponding to each pulse.
4. Set the pulse width (Pulse width): usually 0.5~100 ms.
5. Select the output type: active or passive.
6. Confirm and save.

The pulse output of the Prosonic 93 may be affected by the number of sound paths and installation conditions. It is recommended to verify the signal after setting.

Comparison of Pulse Output Parameters

The key pulse output parameters of the three instruments are compared as follows:

The actual range may vary depending on the model and version. Please refer to the manual.

Wiring and Verification

Pulse output wiring requires selecting the correct terminals according to the output mode. Active output usually provides power, while passive output requires an external power supply. After wiring, verification can be performed by the following methods:

• Use an oscilloscope or frequency meter to measure the output terminals and confirm the pulse signal.
• Check the pulse output frequency or totalized value on the transmitter display.
• Simulate flow changes and observe whether the pulse frequency changes accordingly.

If the signal is abnormal, check the wiring, parameter settings, and receiving device configuration.

Common Problems and Solutions

The following problems may be encountered when setting the pulse output:

• No pulse output: Check whether the output mode matches the wiring and whether the pulse equivalent is too large, causing the frequency to be too low.
• Inaccurate pulse frequency: Confirm that the pulse equivalent is calculated correctly and that the maximum frequency is not exceeded.
• Signal interference: Use shielded cables and ensure good grounding.

If the problem persists, it is recommended to contact the manufacturer's technical support.