PT2E-3343

Warranty

Before use

Installing the main unit

For warranty information, please refer to the warranty
card included in the package.

<Checking included items>
Check the main unit and the accessories. If any items are
missing, contact our sales department.
・ Main unit: 1・ Terminal unit (4 - 20 mA models/EA models only): 1
・ Protective rubber caps: 2
・ Dust filter: 1
・ Mounting plates for compatibility with GD-70D: 2
・ Quick reference guide : 1
・ Warranty card: 1◎ Refer to the operating manual for installation precautions.
◎ Refer to the operating manual for information about
installation when using the mounting plate for compatibility
with GD-70D.
◎ Confirm in advance that there is sufficient space formaintenance.
◎ Remove the protective rubber caps fitted to GAS IN andGAS OUT.

Gas Detector Head
GD-84D-EX Series
GD-84D-EX -EC
GD-84D-EX
GD-84D-EX-ET-EC
GD-84D-EX-ET
GD-84D-EX-EA-EC
GD-84D-EX-EA◎ The mounting plate for compatibility with GD-70D is a special
accessory.

<Communication systems by model andcorresponding sensors>
Communication Corresponding
Powermethodsensor
source
GD-84D-EX-EC4 - 20 mA
ESF
24 V DCNCF/SGF
GD-84D-EX
4 - 20 mA
24 V DC/SHF/ESF
GD-84D-EX-ET-EC Ethernet
ESF
PoE+NCF/SGF
GD-84D-EX-ET
Ethernet
PoE+/SHF/ESF
4 - 20 mA
24 V DC
GD-84D-EX-EA-EC
ESF
Ethernet
PoE+
4 - 20 mA
NCF/SGF
24 V DC
GD-84D-EX-EA
Ethernet/SHF/ESF
PoE+◎ GD-84D-EX-ET and GD-84D-EX-ET-EC lack the functionality
required for contact output.
◎ Do not use 24 V DC and PoE+ power supplies at the sametime.

Thank you for purchasing this GD-84D-EX series GasDetector.
This document is a Quick Reference Guide.
For operating instructions and precautions, pleaserefer to the instruction manual posted on our website.
https://www.rikenkeiki.co.jp/english<Install the main unit (4 – 20 mA models/EA models)>
1 Place the terminal unit against the installation
surface and secure with four screws(M4).
2

Mount the main unit to the terminal unit.

3

Open the front cover of the main unit and use
four built-in screws to secure to the terminal unit.

2ModelQuick Reference Guide<Fitting sensors>
Up to four sensors can be fitted in this product.
From left, the positions for the sensors are [A2] [A1] [B1]
[B2]. These correspond to the [A2] [A1] [B1] [B2] displayson the LCD screen.

123② Mount the main unit.

<Install the main unit (ET models)>
1 Place the main unit against the installation
surface and secure with two cross recessed headscrews with captive washers (plain washer +spring lock washers) (M4-14).

Open the front cover of the main unit. Loosen thefour white knurled screws and pull the chamberunit towards you.
Grasp the cylindrical part of the sensor andattach to the product.
Match the direction of the connector and push in
firmly. Avoid pressing on the top of the sensor while
doing this.
Return the chamber unit to its original position
and tighten the four white knurled screws.

Open the front cover of the main unit and use twobuilt-in screws to secure to the installation
surface.

① Secure with cross recessed head screws withcaptive washers.
② Open the front cover.
③ Secure with

③ Secure
with screws.

<Wiring>◎ Refer to the operating manual for wiring precautions.
◎ Refer to the operating manual for the specifications forcables and the terminal plate.
◎ Refer to the operating manual for recommended cables.

1

Connect the power and signal cables to theproduct.

2

Connect the cables to the terminal plate.
(4 - 20 mA models/EA models)3

Connect the ground wire to the ground terminal.
(Illustration shows ET/EA models)

A2① Secure theterminal unit
with screws.
④ Secure withscrews.

A1

B1

B2

② Loosen.
Inlet for Ethernet cable③ Open the front cover.

CAUTION・ Handle the sensors with care.
・ In general, do not retain or store the sensors afterremoval from the product. Contact Riken Keiki tohandle sensor disposal.
・ Be especially careful to fit the sensors correctly.
[C-02] will appear on the LCD when the sensor fitted
relies on a different principle or has different
specifications from the sensor intended to be fitted
when the product was shipped.
・ Perform calibration (zero calibration, span adjustment)
after fitting the sensors.

Grounding terminal① Open the front cover.

④ Attach the sensor.
③ OpenChamber unit

WARNING・ Be sure to ground the product before supplying power.
・ Never connect grounding wires to gas pipes.
・ Make sure the grounding is Class D or equivalent(grounding resistance not exceeding 100 Ω).
・ Make sure the grounding cable is fitted with cable lugs.
Connect to ground free of slack or twisting.

<Laying pipes>◎ Some gases are highly adsorptive or corrosive. Select thepiping material in consideration of the characteristics of thegas to be detected.
◎ Do not lay piping with U or V shaped angles.
◎ Please contact us to discuss pipe length when samples areto be drawn from distant points.

Front panel and LCD screen displays①① MODE key
Hold down in detection mode to switch to user mode.
Hold down this key in user mode or maintenancemode to return to detection mode.

・ Avoid applying excessive pressure to the sampling
pipe openings.
・ Discharge gas exhausted after detection to a location
determined to be safe by connecting an exhaust pipe
to GAS OUT.

<Performing air calibration>
1 Hold down the MODE key andpress the TEST/SET key when thescreen at right appears.
2

3Press the ▲ key or ▼ key to selectthe sensor to be air calibrated.
The display will cycle through thefollowing selections:[A1]⇔[A2]⇔[B1]⇔[B2]⇔Select all.
Connect the gas sampling bag to this product.
・ When Select all is selected: Connect the gas
sampling bag to GAS IN.
・ When performing for each sensor: Match the nippleof the chamber switching unit to the flow passage ofthe sensor and connect the gas sampling bag (seebelow).
① Open the front cover.

② ▲ key and ▼ key
Used to select sensors or adjust values③ TEST/SET key
Hold down in detection mode to switch to the mode
used to perform alarm tests.
Used in various modes to confirm values or selectsettings.
④ SHIFT key
This key is used for supplementary functions invarious modes.

4

Connect the gas sampling bag for exhaust gas toGAS OUT on this product.

5Press the TEST/SET key to confirm the sensor tobe calibrated.

6

Introduce the air calibration gas. Press theTEST/SET key when the readings stabilize.

7

Check the air calibration results.
If air calibration is successful[OK] is displayed. The display returns
to the display in step 2.
If air calibration failed[NG] is displayed. The display returns
to the display in step 2.

8Disconnect the gas sampling
bag with calibration gas and thegas sampling bag for exhaustgas from the product.
After performing air calibration foreach sensor, be sure to return thechamber switching unit to the [D](detection mode) position.

9Press the MODE key to display [1-1 AIR].

④ Match the flow passage.

③ Pull out.
On flow passage A② Loosen.
Chamberswitching unit

⑤ Connect
the gassampling bags
to the nipples.

Alarm lamp
(First alarm)
Alarm lamp
(Second alarm)

WARNING

10 Hold down the MODE key to switch to detectionmode.
◎ Refer to the operating manual for more information on aircalibration.
On flow passage B⑦⑨⑩⑪②③④Piping(Teflon pipe of φ6 (OD) ‒ φ4 (ID))⑧Fault lamp

Union

Sleeve⑥Power lamp

Install the pipes for the sampling pipes (GAS IN, GASOUT) as shown below.

Ferrule⑤⑤ Gas name display⑥ Concentration display⑦ Sensor positioning indicators⑧ Concentration bar display
The detection range (full scale) is scaled. The gas
concentration is displayed as ratios of the full scale.
⑨ Units display⑩ Flow display
The suction is 0.6 L/min (standard flow rate) when thesuction flow rate indicator bar is positioned in the middle.
⑪ Maintenance display section◎ Alarm contacts are disabled when [MAINTE] appears in themaintenance display section.
◎ The suction flow rate for this product is automaticallyadjusted by the automatic flow adjuster function. The flowrate is automatically adjusted even if the flow display varies
from the stipulated flow rate. No flow adjustment is normallyrequired.
If automatic adjustment is not possible due to a blockage orleak in the piping, adjust manually until the flow reaches thestipulated value. Refer to the operating manual for
information on manual adjustments.

<Measuring gas concentrations>
Measure gas concentrations in detectionmode.
◎ The product cannot detect gases while inuser mode or maintenance mode. Be sure
to return to detection mode after user
mode or maintenance mode operations
are complete.

When the detected gas or oxygen concentration reaches
the alarm setpoint or exceeds the alarm setpoint, thealarm lamp lights up in red.
◎ The contacts will activate on 4 - 20 mA models/EA models.
First alarm

Second alarm・ When a gas alarm is triggered, respond promptly inaccordance with the rules established for the site orfacility.
・ To cancel an alarm, press the MODE key, TEST/SETkey, ▲ key, or ▼ key in detection mode.

Measuring gas concentrations<Preparations for startup>
Perform the following checks before connecting thepower supply.
・ Is the product grounded?
・ Is external wiring connected correctly?
・ Is the voltage of the supplied power source within therated range?
・ Is the connected piping free of blockages and leaks?
・ Are filters properly attached (if necessary)?
<Turning on the power>
Turn on the power switch on the underside of the main
unit to start.
Power switch

Initialization will take place after the power is turned on. This
will take approximately 25 seconds. The process performs
system checks and disables alarms, and performs otherstartup settings, then enters detection mode.
Do not turn the power off during initialization.
◎ External contacts may activate immediately after the initial clear.
Take precautions to prevent unwanted consequences in this case.