Nohken GW100NR User manual

ＴＳ０２－１０００２２

ＩＮＳＴＲＵＣＴＩＯＮＭＡＮＵＡＬ

FOR

GUIDED PULSE LEVEL MEASUREMENT

MODEL: ＧＷ１００

Revised 2020-10-28

- ADD 1 -

Read this manual carefully for safe usage.

・This manual applies to general purpose equipment. For equipment intended for

use in potentially explosive atmospheres, see applicable manuals.

・This manual contains important information on handling, inspection and

operation of the equipment indicated on the cover page. Before handling the

equipment, read this manual carefully.

・Instructions in documents submitted by Nohken or its representative have

higher priority than those in this manual.

・Keep this manual within easy access.

・Depending on environment, the equipment may not satisfy specifications

shown in this manual. Check the application conditions carefully beforehand.

・Please contact our sales office for any questions or comments about the

equipment or this manual. Sales offices are shown on the back of the manual.

Safety Symbols:

WARNING Means a potentially hazardous situation which,

if necessary precautions are not observed, can result

in death, serious injury and/or considerable material

damage.

CAUTION Means a hazardous situation which, if necessary

precautions are not observed, can result in minor or

moderate injury or damage to the device.

Means prohibited actions.

Means mandatory actions.

- ADD 2 -

WARNING

This equipment is NOT intended for use in potentially hazardous

atmospheres. Never use it where flammable gas or vapor may be

present. Failure to observe this may result in ignition of flammable

gas or vapor, causing disaster.

Do not alter or disassemble the equipment, unless you have been

instructed to do so by Nohken or its representative.

Failure to observe this may result in:

- malfunction of or damage to the equipment or connected devices;

- ignition;

- electric shock or user injury.

Turn off the equipment before wiring or inspection. Otherwise

leakage or short circuit may cause ignition or electric shock.

After wiring is complete, always check for its correctness. Wrong

wiring may cause:

- damage to or malfunction of the equipment or connected devices;

- ignition;

- electric shock or user injury.

Turn off the equipment immediately in case smoke, unusual smells

or sounds are noticed. Do not supply power until problems are

solved.

CAUTION

Handle the equipment with care. Do not drop, throw, or give

a strong shock to avoid damage.

Observe operation conditions specified in the manual. Use outside

the specified conditions may result in malfunction of or damage to

the equipment or connected devices, ignition, user injury, or

electric shock.

Perform operation tests before actual application to ensure

performance. Install back-up instruments based on different

technologies if failure of this equipment is expected to result in

a serious incident.

- ADD 3 -

CAUTION

Check carefully for chemical compatibility of materials of

construction before installation.

Use the flange, thread or somewhere close to the process

connection to handle the equipment. Do not use the housing to

avoid dropping the equipment, and resultant damage to the

equipment or user injury.

Equipment 50cm or longer:

Lay the equipment when not in use. Otherwise it may fall and

damage itself or things around it, and cause user injury.

Always ground the equipment. (Grounding resistance: 100Ωmax.)

Without grounding, electric shock may occur in case excessive

voltage is applied to the housing.

When connecting to inductive or lamp loads:

Ensure the maximum voltage/current ratings will not be exceeded

to avoid damage to the relay contacts.

Use lightening arrestors or surge absorbers to prevent:

- malfunction, damage, or ignition of the equipment and connected

instruments;

- electric shock or injury.

- ADD 4 -

INTRODUCTION

A) This manual applies to standard models. Please note that information in

this manual may not be applied to customized versions.

B) We are willing to help customers select a suitable model or provide

information about chemical compatibility of materials used, but the

customer is responsible for the decisions made.

C) We always welcome suggestions and comments about this manual.

Please contact our sales office when you have questions or comments.

D) Component replacement:

The equipment design is regularly reviewed and improved. The same

components therefore may not be available when replacement is required.

In such cases, different components or products may be supplied. Please

contact our sales office for detail.

E) The contents of this manual are subject to change without prior notice as

a result of improvement of the equipment.

WARRANTY & DISCLAIMER

A) Nohken warrants the equipment against defect in design or material, and

workmanship for a period of one (1) year from the date of original

shipment from Nohken’s factory.

B) Nohken will not assume liability for loss nor damage resulting from the

use of the equipment.

C) Nohken will not assume liability for damage resulting from:

C-a) not observing instructions in this manual;

C-b) installation, wiring, operation, maintenance, inspection, or storing in

a manner not outlined in this manual;

C-c) unauthorized alterations and repairs;

C-d) the use of or replacement with components not provided by Nohken;

C-e) devices or instrument other than those manufactured by Nohken;

C-f) the use not described in Chapter 1 Purpose of Use of the manual;

C-g) force majeure including, but not limited to, fire, earthquake, tsunami,

lightning strike, riot, commotion, war, armed conflict or terrorist

attack, radioactive pollution, act of God, governmental decisions or

actions, and compliance with laws and regulations.

THE PROVISIONS OF THIS SECTION DO NO LIMIT YOUR LEGAL RIGHTS.

Table of Contents

1.PURPOSE OF USE

····································· 1

2.DESCRIPTION

····································· 1

2.1 Product Overview ····································· 1

2.2 Principle of Operation ····································· 1

3.SPECIFICATIONS

····································· 2

3.1 Parts Name and Function ····································· 2

3.2 Model Numbering ····································· 3

3.3 Specifications ····································· 4

3.4 Outline Drawing ····································· 5

3.5 Probe length and Components ····································· 9

3.6 Optional Components ····································· 10

4.HANDLING NOTES

····································· 11

5.INSTALLATION

····································· 12

5.1 Tools for Mounting ····································· 12

5.2 Tools for Probe Trimming ····································· 13

5.3 Unpacking ····································· 14

5.4 Assembling Probe ····································· 15

5.4.1 Rod probe sensors (GW100□R□□) ···································· 15

5.4.2 Sensors with tubing with threaded connection(GW100NP□□) ················ 17

5.4.3 Sensors with tubing with gasket(GW100SP□□)······························ 19

5.5 Cutting Probe ····································· 20

5.5.1 Rod probe (GW100□R□□) ····································· 20

5.5.2 Wire probe (GW100□W□□) ····································· 21

5.6 Mounting Sensor ····································· 23

5.6.1 Location ····································· 23

5.6.2 Mounting ····································· 26

6.WIRING

····································· 27

6.1 Before Wiring ····································· 27

6.2 Wiring ····································· 27

6.3 Cable Inlet ····································· 29

6.4 Placing Cover ····································· 29

7.OPERATION

····································· 30

7.1 Before Operation ····································· 30

7.1.1 Key name and function ····································· 30

7.1.2 Modes and operation flow ····································· 31

7.1.3 Startup behavior ····································· 32

7.2 Commissioning ····································· 33

7.3 Quick Setting ····································· 33

7.3.1 Procedures ····································· 34

7.3.2 Canceling Quick Setting ····································· 37

7.4 Parameter Reference ····································· 38

7.4.1 Program mode parameter ····································· 38

7.4.2 Test mode parameter ····································· 43

7.5 Reference Drawing ····································· 44

7.6 Program Mode ····································· 45

7.6.1 Switching to Program Mode ····································· 45

7.6.2 Updating data ····································· 46

7.6.3 Canceling entry ····································· 47

7.6.4 Blanking ····································· 48

7.6.5 Fail-safe ····································· 50

7.6.6 Sensitivity ····································· 53

7.6.7 False echo suppression with material ····································· 55

7.6.8 False echo suppression without material ·································· 57

7.6.9 Reset ····································· 59

7.7 Test Mode ····································· 61

7.7.1 Switching to Test Mode ····································· 61

7.7.2 Exiting Test Mode ····································· 62

7.7.3 Simulation (mm, %) ····································· 63

7.7.4 Simulation (mA) ····································· 65

7.7.5 LCD test ····································· 67

8.MAINTENANCE AND INSPECTION

························· 68

8.1 Maintenance Procedure ····································· 68

8.2 When to Replace Components ····································· 68

9.STORING

····································· 69

9.1 Conditions ····································· 69

10.TROUBLESHOOTING

····································· 70

10.1 Error Code ····································· 70

10.2 Troubleshooting ····································· 71

11.APPENDIX

····································· 76

11.1 Glossary ····································· 76

11.2 Parameter List ····································· 77

- 1 -

1. PURPOSE OF USE

Guided Pulse Level Measurement GW is a sensor designed to continuously measure liquid level, and

provide output for alarms or to control pumps. Do not use the product for any other purpose.

2. DESCRIPTION

2.1 Product Overview

GW comprises of an electronics in a housing, process connection (threaded connection*or flange*)

and probe*. The probe is inserted into the tank and used to measure the distance to the material

level.

The probe assembly has no moving parts, so the material buildup and resultant adverse affection

to measurement are minimized. The user can cut off the end of the rod or wire type probe to a desired

length. The sensor is easy to program without needing a tester or other device to configure the

zero and span points.

2.2 Principle of Operation

The characteristic impedance of the probe changes when material surface reaches the probe.

The sensor electronics transmits high frequency signals that travel down on the probe. The signals

are reflected on the material surface, where the characteristic impedance changes, and then received

by the sensor electronics. The sensor electronics measures the time taken from transmission to

reception of the signals, and calculates the distance from the reference point to the material

surface. The distance is then converted to analog output of 4 to 20mA.

Fig. 2-1

* See

11.1 Glossary

- 2 -

3. SPECIFICATIONS

3.1 Parts Name and Function

GW100NR□□

Rod type

Threaded (G3/4)

Rod probe

GW100NW□□

Wire type

Threaded (G3/4)

Wire probe

GW100NP□□

Tubed type

Threaded (G1)

Tubed rod probe

GW100SP□□

Sanitary type

ISO 2.0 or equivalent

Tubed rod probe

① Cover

② Housing : protects the electronics.

③ Reference point : Point referenced to when deciding the measurement range. Location is model

dependent.

④ Probe : Component in rod or wire that is inserted in the tank and detects liquid

surface.

⑤ Lower blanking : Area close to the probe end where measurement is not possible or accuracy

low.

⑥ Probe length : Distance from the reference point to the probe end.

⑦ Upper blanking : Area close to the process connection where measurement is not possible or

accuracy low.

⑧ Cable inlet

⑨ Earth plate : Metal plate to stabilize operation. Required for non-metallic mounting

connection such as plastic vessel applications.

- 3 -

3.2 Model Numbering

GW100 □ □ □ □

Configuration

0*1 Without probe

1 With probe

Temperature

A Standard (100℃ max.)

T High temperature (150℃ max.)

Probe and material

R*2 Rod

316SS, PEEK, FKM

W*2 Wire

316SS, PEEK, FKM

PTubed rod

PFA, PTFE (316SS, PEEK, FKM)*3

Z Custom

Process connection

N Threaded

S Sanitary

Z Other connections

*1 Available only for Probe and material option “R”(rod).

*2 Not available for process connection option “S”(sanitary). Select “Z”here instead.

*3 Not wetted.

Rod and tubed rod probes are NOT factory assembled.

This manual suits for next models

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