Riken Keiki GH-5001 User Manual

PT1E-10511
Indicator/Alarm Unit
RM-5000 Series
Operating Manual

Riken Keiki GH-5001 Specifications

General

Model	GH-5001
Display	LCD
Response Time	Less than 30 seconds
Measurement Range	0 to 100% LEL
Weight	Approx. 1.5 kg
Alarm Set Points	Adjustable
Operating Temperature Range	-20°C to +50°C
Alarm Method	Visual and audible alarms
Output Signal	4-20 mA
Operating Humidity	0 to 95% RH

Summary

Outline of the Product

1-3. Hazard Definitions

Explains hazard classifications (Danger, Warning, Caution) and notes for safe operation.

Important Safety Notices

2-1. Danger Cases

Highlights critical safety warnings, such as the unit not being explosion-proof.

2-2. Warning Cases

Details warnings regarding device connection, power supply, grounding, and operation.

2-3. Precautions

Provides essential precautions for operation, maintenance, and modifications.

How to Use

4-1. Before Using the Unit

Outlines precautions to follow before operating the indicator/alarm unit.

4-2. Installation Point Precautions

Details environmental and physical conditions to avoid when installing the unit.

4-3. System Design Precautions

Provides guidance on system design, power supply, and lightning protection.

4-4. How to Install

4-5. Wiring Recommendations

Specifies recommended cables and wiring precautions for connecting the unit.

4-5. Grounding

Explains proper grounding procedures, including warnings about gas pipes.

4-5. Detector Head Wiring (OX/GH)

4-5. Detector Head Wiring (EC/RM)

4-5. Detector Head Wiring (RM-5003)

How to Operate

5-1. Preparation for Start-up

Lists essential precautions before connecting power and starting the unit.

5-2. Basic Operating Procedures

Explains the basic operation modes (Detection, Maintenance, Gas Alarm Test).

5-3. How to Start the Unit

Details the step-by-step procedure for powering on and starting the indicator/alarm unit.

5-4. Modes Overview

5-4. User Mode Details

5-4. Regular Maintenance Mode Details

5-6. Alarm Test Mode

Describes how to perform alarm tests for lamps and external outputs.

5-7. User Mode Operations

5-7. Zero Adjustment

5-7. Setting Display

5-8. How to Exit

Operations and Functions

6-1. Gas Alarm Activation

Explains how the unit triggers alarms based on gas concentration levels.

6-2. Fault Alarm Activation

Explains how fault alarms are triggered and what the FAULT lamp indicates.

6-3. External Output Operation (4-20mA)

6-3. External Output Operation (NC-5001W)

Maintenance

7-1. Maintenance Intervals and Items

Outlines daily, monthly, and regular maintenance tasks and their frequencies.

7-2. Regular Maintenance Mode

Introduces the regular maintenance mode and its available functions.

7-2. GAS TEST Function

7-2. Zero and Span Adjustment

Explains the Zero and Span adjustment procedures in regular maintenance mode.

7-2. Operation Settings

7-2. Alarm Settings

7-2. Environmental Setting 2 (Address/Time)

7-2. Environmental Setting 2 (RLY PTRN/ALM TYPE)

7-2. Environmental Setting 2 (MNT OUT/MA 4-20)

7-2. Contact Setting Specification

7-2. Environmental Setting 3 (PCB/Heater/Load)

7-2. Amplifier Initialization

7-2. Heater Current Adjustment

7-3. Gas Calibration Method

Explains gas calibration procedures for detector heads using calibration gas.

7-3. Zero Adjustment

Step-by-step guide for performing the zero adjustment on the detector head.

7-3. Span Adjustment (GP-5001)

Procedure for span adjustment of the detector head for GP-5001 model.

7-3. Span Adjustment (NC-5001W Low Range)

Procedure for low range span adjustment of the NC-5001W model.

7-3. Span Adjustment (NC-5001W High Range)

Procedure for high range span adjustment of the NC-5001W model.

7-5. How to Replace Fuse

Storage, Relocation and Disposal

Troubleshooting

9. Troubleshooting Overview

9. Unit Abnormalities

Lists unit-specific symptoms, causes, and troubleshooting actions.

9. Reading Abnormalities

Product Specifications