Qel QIRF User Manual (English)

Questions and Answers:

R
Rodney ReedAug 4, 2025
Why is the RS-485 RX or TX LED constantly ON in my Qel Accessories?
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  Tammy DavisAug 4, 2025
  If the RS-485 RX or TX LED on your Qel Accessories is constantly ON, it could be due to a problem with the RS-485 bus connection, a damaged RS-485 Driver U7, or an issue with the RS-485 Driver on the controller side. Try disconnecting the cable to isolate the problem. If that doesn't work, consider replacing the U7 IC on the display board or replacing the RS-485 Driver in the controller.
D
Danielle BakerAug 11, 2025
What to do if Qel Accessories is in Warm Up Mode too long?
- O
  olynchAug 11, 2025
  If your Qel Accessories device is stuck in Warm Up Mode for an extended period, it could be due to several reasons: the device is still warming up, the temperature sensor is broken, or the heater is broken. First, wait for the block to warm up. If the problem persists, check the IR Block Assembly.
T
Thomas YoungAug 18, 2025
How to fix Qel QIRF Accessories when IR Source LED is constant ON or OFF, not blinking?
- B
  Bobby JonesAug 18, 2025
  If the IR Source LED on your Qel Accessories is constantly ON or OFF instead of blinking, there might be a problem with the Main Board or the Heater is short/open. You should check the Firmware and Driver and check the IR Block Assembly.
P
Paul SalazarAug 27, 2025
What causes Qel QIRF Accessories reading abnormally high or low?
- K
  Kelly ColeAug 27, 2025
  If your Qel Accessories is reporting readings that are abnormally high or low, or jumping around randomly, it could be caused by a dirty sensor block, excessive moisture, a weak IR source, or a loose temperature sensor. Consider adding a filter to the gas inlet or replacing the IR Source Assembly. Also, check the IR Block Assembly.

Qel QIRF Specifications

General

Brand	Qel
Model	QIRF
Category	Accessories
Language	English

Summary

Read Before Operating

General Information

Provides an overview of the QIRF sensor, including its operating principle.

Key Features and Applications

Key Features

Lists the main technological advantages and components of the QIRF sensor.

Applications

Details the various industrial environments where the QIRF is suitable for refrigerant loss monitoring.

Specifications

Installation Guide

Sensor Location and Physical Dimensions

Offers guidance on selecting optimal placement and displays physical measurements and mounting details.

Gas Sampling and Wiring

Describes gas sampling methods and details how to mount the unit and connect system wiring.

System Components and Connections

Terminals and Power Supply

Explains the terminal block connections and power supply requirements for the QIRF.

Wiring and Communication Setup

Covers wire specifications, digital connection diagrams, and RS-485 termination.

Analog and RS-485 Outputs

Details the configuration and use of 4-20mA/2-10VDC analog output and RS-485 driver replacement.

Relays Output Configuration

Explains the functionality and specifications of the three programmable relays.

Function and Configuration

Working Modes and System Initialization

Outlines operational states including warm-up, monitoring, and initialization procedures.

Keypad Operation and Menu Navigation

Details how to use front panel keys and navigate through system settings and calibration options.

Status Indicators and Controls

Explains status LEDs, relay status, and functions for silencing buzzers or resetting relays.

System Setting Menu Options

Calibration Procedures

Zeroing Calibration Process

Describes the procedure for zero gas calibration, including equipment and steps.

Span Calibration Procedure

Outlines the steps and requirements for performing a span calibration with reference gas.

Output Testing and Database Management

Output Testing Functionality

Explains how to test relay and buzzer actions and analog output signals.

Relay Database Configuration

Details how to configure relay settings like enable, energize, latching, and action points.

Analog Output Setup

Describes the configuration of analog output, including concentration points for 4mA and 20mA signals.

Buzzer Configuration

Explains the setup options for the unit's buzzers, including priority and types.

Special Modes and Protocols

Output and Simulation Modes

Covers functions for disabling outputs during calibration and enabling simulation mode for testing.

Qel QIRF User Manual

Table of Contents