RKI Instruments GD-70D-NH3, GD-70D-MCH4-20K, GD-70D-DEA, GD-70D-DMA, GD-70D-MR41 User manual

...
Gas Detector Head
Part Number: 71-0446 Revision: P4 Released: 4/2/21
GD-70D Series

Operating Manual

Request for the Customers

Read and understand this operating manual before using the detector.
You must operate the detector in accordance with the operating manual.
Regardless of warranty period, we shall not make any compensation for accidents and damage
caused by using this product.
The compensation shall be made only under the warranty policy of products or parts replacement.
Because this is a safety device, daily and biannual maintenance must be performed.
If you find abnormalities in the detector, please contact our local representative immediately.
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<Contents>

Request for the Customers ..................................................................................... 1
1 Outline of the Product .................................................................................................... 4
1-1 Preface ............................................................................................................. 4
1-2 Product Purpose ............................................................................................... 4
1-3 Definition of DANGER, WARNING, CAUTION and NOTE .............................. 5
1-4 Method of confirmation for CE marking type .................................................... 5
2 Important Notices on Safety .......................................................................................... 6
2-1 Danger Statements ........................................................................................... 6
2-2 Warning Statements ......................................................................................... 6
2-3 Caution Statements .......................................................................................... 7
3 Product Components ..................................................................................................... 8
3-1 Main Unit and Standard Accessories................................................................ 8
3-2 Outline Drawing ................................................................................................ 9
3-3 Names and Functions for Each Part................................................................. 10
3-4 Operation Diagrams ......................................................................................... 14
4 Installation ...................................................................................................................... 16
4-1 Requirements ................................................................................................... 16
4-2 Precautions for Installation Sites ...................................................................... 16
4-3 Precautions for System Designing ................................................................... 18
4-4 Proper use of alarm contact ............................................................................. 19
4-5 Installing the Detector ....................................................................................... 20
4-6 Wiring the Detector ........................................................................................... 22
4-7 Making Tubing Connections ............................................................................. 34
4-8 Disposal ............................................................................................................ 35
5 Operation ....................................................................................................................... 36
5-1 Preparation for Start-up .................................................................................... 36
5-2 Starting Up the Detector ................................................................................... 36
5-3 Turning Off the Detector ................................................................................... 38
5-4 Basic Operation ................................................................................................ 38
5-5 Modes ............................................................................................................. 39
6 Detection Mode .............................................................................................................. 41
6-1 Gas Alarm Activation ........................................................................................ 41
6-2 Fault Alarm Activation ....................................................................................... 47
6-3 External Output Operation ................................................................................ 47
6-4 Other Functions ................................................................................................ 50
6-5 About LONWORKS (LN specification) ............................................................. 53
7 Alarm Test Mode ............................................................................................................ 57
7-1 Alarm Test Mode ............................................................................................... 57
8 User Mode ..................................................................................................................... 59
8-1 User Mode ........................................................................................................ 59
9 Maintenance Mode ........................................................................................................ 65
9-1 Environmental Setting 1 "2-9" ........................................................................... 70
9-2 Alarm Value Setting "2-9" - "SET 1" .................................................................. 71
9-3 Fault Alarm Test "2-9" - "SET 4" ....................................................................... 73
9-4 Environmental Setting 2 "2-10" ......................................................................... 74
9-5 Date/Time Setting "2-10" - "SET 1" .................................................................. 79
9-6 Energized/De-Energized Contact Setting "2-10" - "SET 6" .............................. 81
9-7 ETHERNET Setting "2-10" - "SET 18" ............................................................. 83
10 Maintenance .................................................................................................................. 86
10-1 Maintenance Intervals and Items ........................................................ 86
10-2 Calibration Overview ........................................................................... 86
10-3 Calibrating with the Target Gas ........................................................... 90
10-4 Calibrating with a Surrogate Gas (Sensors with Factors) ................... 93
10-5 Calibrating with a Gas Bag (Calibrating with HCl) ............................... 99
10-6 Calibrating with a Humidifier (MOS Sensors) ...................................... 103
10-7 Calibrating a Pyrolyzer Unit ................................................................. 107
10-8 Flow Rate Adjustments ........................................................................ 11 0
10-9 Replacing Parts ................................................................................... 112
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10-10 Storing the GD-70D ............................................................................. 115
11 Troubleshooting ............................................................................................................. 116
12 Product Specifications ................................................................................................... 119
12-1 Common Specifications ....................................................................... 119
12-2 Specifications for Each Model ............................................................. 119
12-3 Specifications for Each Sensor Type ................................................... 120
12-4 Full Scale and Alarm Points ................................................................. 123
13 Calibration Parts List...................................................................................................... 126
14 Replacement Parts List ................................................................................................. 129
Warranty Policy ....................................................................................................... 142
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GD-70D
4 - 20 mA specification
Analog transmission
GD-70D-NT
NT specification
2-wire type DC power-line communication
GD-70D-EA
EA specification
Ethernet and analog transmission (4 - 20 mA)
GD-70D-LN
LN specification
LONWORKS
1

Outline of the Product

1-1 Preface

Thank you for choosing our GD-70D Series gas detector head. Please verify that the model number of the product you purchased is included in the specifications on this manual.
This manual explains how to use the detector and its specifications. It contains information required for using the detector properly. All users must read and understand the operating manual before using the detector.

1-2 Product Purpose

This is a fixed type gas detector head which detects gas leaks in semiconductor factories, etc.
The gas detector is a safety device, not an analyzer or densitometer which performs quantitative/qualitative
analysis/measurement for gases. You must understand the features of the detector before using it, so that you can use it properly.
The detector detects abnormalities in the air caused by the presence of gas (or oxygen deficiency) with the built-in gas sensor unit. The concentrations of detected gases are shown on the LCD.
The built-in pump in the detector draws gas to perform gas detection.
The detector has two-step gas alarm contact and fault alarm contact.
The detector outputs the gas concentration in 4 - 20 mA or digital data.
The communication method for each specification is as follows.
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CE Marking

1-3 Definition of DANGER, WARNING, CAUTION and NOTE

This message indicates that improper handling may cause serious damage
DANGER
WARNING
CAUTION
on life, health or assets.
This message indicates that improper handling may cause serious damage on health or assets.
This message indicates that improper handling may cause minor damage on health or assets.
NOTE
This message indicates advice on handling.

1-4 Method of confirmation for CE marking type

The CE marking is labeled on the detector in case of comply with CE marking. Please confirm the instrument specification before using. Please refer to the Declaration of Conformity that is at the end of this manual if you have CE marking type. You can confirm instrument specification to see the CE marking as follows.
CE marking label (Back of front cover)
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Power Supply
2

Important Notices on Safety

2-1 Danger Statements

DANGER

This is not an explosion-proof device. You must not use it to detect gases exceeding the lower limit of explosion.

2-2 Warning Statements

WARNING

Before turning on the detector, always check whether the voltage is properly applied. Do not use an unstable power supply because it may cause malfunctions.
Need of grounding circuit
Do not cut the grounding circuit or disconnect the wire from the grounding terminal.
Defects in protective functions
Before starting the detector, check the protective functions for defects. When defects are found in the protective functions, such as protective grounding, do not start the detector.
External connection
Before connecting the detector to external equipment or an external control circuit, securely connect it to a protective grounding circuit.
Tubing
The detector is designed to draw gases around it under normal atmospheric pressure. If excessive pressure is applied to the sampling inlet and outlet (GAS IN, GAS OUT) of the detector, detected gases may leak from the flow system and pose dangers. Be sure that excessive pressure is not applied to the detector when it is used. Detected gases must be exhausted from the outlet (GAS OUT) on the bottom of the detector to a safe place using an exhaust tube.
Handling the sensor unit
Do not disassemble the electrochemical type sensor unit (ESU) or galvanic cell type sensor unit (OSU) because they contain electrolyte. Electrolyte may cause severe skin burns if it contacts skin and may cause blindness if it contacts eyes. It may discolor or damage clothing. If contact occurs, rinse the area immediately with a large quantity of water.
Zero adjustment (AIR Adjustment) in the atmosphere
When zero adjustment (AIR Adjustment for oxygen deficiency alarm) is performed in the atmosphere, check the atmosphere for freshness before beginning the adjustment. If other gases exist, the adjustment cannot be performed properly and the detector will not properly detect gas.
Operation in a gas
Do not operate the detector in a place where flammable/explosive gases or vapors are present. Operating the detector in such an environment will lead to extreme dangers.
Response to a gas alarm
Issuance of a gas alarm indicates that there are extreme dangers. Take proper actions based on your judgment.
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Definition of Terms
Do not use a transceiver (walkie-talkie) near the detector.

2-3 Caution Statements

CAUTION

Radio waves from a transceiver near the detector or its cables may disrupt detector operation. When using a transceiver, it must be used in a place where it disturbs nothing.
Do not turn the detector on less than 5 seconds after it was turned off.
Restarting the detector less than five seconds after turning it off may cause errors.
Verify that the reading on the flow rate indicator corresponds to the specified flow rate before using the detector.
If it does not correspond to the specified flow rate, gas detection cannot be performed properly. Be sure the flow rate is stable.
Attach the dust filter before using the detector.
Before using the detector, attach the specified filter to prevent disturbances by possible gas absorption or air dust. The dust filter used depends on the gas being detected. For more information on dust filters, please contact RKI.
Observe the operating restrictions to prevent condensation inside the tube.
Condensation formed inside the tube causes clogging or gas absorption, which disturbs accurate gas detection. Thus, condensation must be avoided. In addition to the installation environment, carefully monitor the temperature/humidity of the sampled area to prevent condensation inside the tube. In particular, when detecting a corrosive, water-soluble gas, such as a strong acid gas, the gas is undetectable and furthermore may corrode internal parts. Please observe the operating restrictions.
Do not use the external output of the detector to control other devices.
This is not a control device. You are not allowed to use its external output to control other devices.
Do not disassemble/modify the detector, or change the settings unless necessary.
Disassembling/modifying the detector will invalidate the guarantee of the performance. Changing the settings without understanding the specifications may cause alarm malfunctions. Please use the detector properly in accordance with the operating manual.
Do not forget to perform regular maintenance.
Since this is a safety device, regular maintenance must be performed to ensure its safety. Continuing to use the detector without performing maintenance will compromise the sensitivity of the sensor, thus resulting in inaccurate gas detection.
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<Standard Accessories>
3

Product Components

3-1 Main Unit and Standard Accessories

<Main Unit>
Operating manual
Protective rubber cap (to be removed when using the
detector)
Dedicated handling lever (for wiring)
Dust filter
Interference gas removal filter
(to be supplied with sensor units for certain gases)
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Pyrolyzer Unit
(Unit: mm)
GAS IN
GAS OUT
Sensor unit display
Operating switch
Screw for grounding earth rod
External wire hole
Connector for PLU
Power switch
<Pyrolyzer Unit (PLU-70)(Option)>
* This is needed in “pyrolyzer + electrochemical type (ESU)” and “pyrolyzer + pyrolysis-particle type (SSU)”. For more information on the pyrolyzer unit (PLU-70), see the separate operating manual.

3-2 Outline Drawing

M5 mounting hole
Display
Protective cover for power switch
Connector for PoE
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Wall-mounted unit
Main unit
Pump unit
Sensor unit
MODE key
Lock lever
Sensor unit nameplate display window
Power lamp
First alarm lamp
Second alarm lamp
Fault lamp
Gas name display
Concentration
Unit display
Concentration
Alarm setpoint Flow rate
indicator
Communication Maintenance
indicator
Inhibit indicator
Pyrolyzer unit
CAUTION
the unit compromises its original performance or causes malfunctions.

3-3 Names and Functions for Each Part

The detector consists of the following units.
Each unit consists of precision parts. When a unit is detached, be careful not to drop it. Dropping

<Front Panel and Character LCD>

  TEST/SET key  key  key
bar indicator
indicator
value display
indicator
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connection indicator
MODE key
Used to enter User and Maintenance Mode. It is also used to cancel or skip in a specific mode.
TEST/SET key
Used to enter the test mode. It is used for confirmation in a specific mode.
key
Used to change screens or change a value (UP).
key
Used to change screens or change a value (DOWN).
Lock lever
Lever to lock the main unit. Push it to attach or detach the main unit.
Sensor unit nameplate display window
Window to view information on the currently installed sensor.
Power lamp (POWER)
Power lamp. Turns green when the power is on.
First alarm lamp (ALM1)
First alarm lamp. Turns red when the first alarm is reached.
Second alarm lamp (ALM2)
Second alarm lamp. Turns red when the second alarm is reached.
Fault lamp (FAULT)
Fault lamp. Turns yellow when an abnormality is detected in the detector.
Gas name display
Displays the gas name in chemical formula (e.g. Silane = SIH4).
Concentration value display
Displays the gas concentration.
Unit display
Displays the unit according to the specification (ppm, ppb, vol%, %, %LEL).
Concentration bar indicator
The detectable range (full scale = FS) is divided into 20 segments. The increase in concentration is displayed in proportion to the full scale.
Alarm setpoint indicator
The alarm setpoints (AL1 and AL2) are indicated on the concentration bar.
Flow rate indicator
Displays the flow rate. When the line is in the middle of the indicator, the flow rate is normal (0.5 L/min).
Communication indicator
For GD-70D-NT, this indicator is displayed while transmitting data with the upper unit (TX, RX).
Maintenance indicator
Displayed while in Maintenance Mode. When this indicator is displayed, the alarm contact is disconnected and there are no alarms.
Inhibit indicator
Displayed when the inhibition (point skip) is set.
Pyrolyzer unit connection indicator
Displayed when the dedicated pyrolyzer unit (PLU-70) is connected.

<Main Unit>

The main unit of the GD-70D houses the sensor unit, pump unit, and circuitry for the detector. The main unit installs to the mounting plate’s terminal plate.

<Pump Unit>

The pump unit gets installed in the main unit. It draws sample into the detector at 0.5 L/min.
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adjustment).
Mounting hole
10-point terminal plate: Connections for power supply, signal cables and other external wires.
Locking lever: Locks the main unit to the mounting plate.

<Mounting Plate>

The mounting plate gets installed to the installation site. The main unit connects to the mounting plate using the 10-point terminal plate.

<Sensor Unit>

A sensor unit installed in the detector is the same regardless of the detection principle which means sensor units are interchangeable. Each sensor unit has a different color that corresponds to the detection principle as shown below. Handling of the sensor unit depends on the detection principle.

CAUTION

The sensor unit must be handled carefully to ensure quality. When the sensor unit is stored, a dedicated warehouse and power equipment for the sensor unit are needed. In principal, the sensor unit must not be detached from the detector when it is handled or stored.
Be sure that the sensor unit is installed properly. If a sensor unit is of different specification or principle than the one shipped from the manufacturer, a message will be displayed on the detector LCD (C-02). If this message is displayed, make sure you are using the correct sensor unit.
After the sensor unit is replaced, always perform a gas calibration (zero adjustment and span
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Electrochemical
Do not disassemble the sensor unit because it contains electrolyte. If contact
Pyrolysis-particle
Although the sensor unit contains radioactive materials, it is certified as a
Semiconductor
Before using the sensor unit, it needs to be warmed up for a specified time.
Unpowered time Suggested warm-up time
SGU-8541 (H2)
SGU (Others)
10 minutes or less
10 minutes or more
2 hours or more
1 hour or less
30 minutes or more
2 hours or more
24 hours or less
1 hour or more
4 hours or more
72 hours or less
4 hours or more
24 hours or more
10 days or less
2 days or more
2 days or more
Less than 1 month
7 days or more
7 days or more
Less than 3 months
14 days or more
14 days or more
3 months or more
1 month or more
1 month or more
Dedicated case
Dedicated case
type (ESU)
type (SSU)
occurs, rinse the area immediately with a large quantity of water.
The sensor unit identifies the storage direction. Put the sensor unit in the dedicated case while handling it. Do not place it on its side or upside-down.
When a new sensor unit is installed, it must be warmed up. Although warm-up time is different depending on the type of the installed sensor, it is recommended that warm-up should be performed for three hours or more. Please contact RKI for more information.
The sensor unit must be stored in a clean, cool and dark place away from direct sunlight. Some types of the sensor units cannot be stored together with other units. Please contact RKI for more information.
specified designing certification device, which is regarded as a device having no influences on health. Observe the "Safety Manual" which stipulates conditions for the certification. To dispose of the sensor unit, you must return it to us. You do not need to take any additional actions.
The sensor unit contains a small amount of radioactive materials. Do not disassemble it, or dispose of it like other wastes.
The sensor unit must be put into the dedicated case specified by us, and stored away from direct sunlight in a clean place where the temperature and humidity are maintained at a normal level and where appropriate measures are taken to prevent the sensor from being taken out easily.
When the sensor unit is transported out of your factory, please use a transportation company which can handle specified designing certification devices (L-type packages).
For more information, see the "Safety Manual".
type (SGU)
The sensor unit is warmed up sufficiently in our factory before it is delivered to you. Therefore, after you receive the sensor unit, please use it as soon as possible so that unpowered time is minimized.
The warm-up time before using the sensor unit is related to how long the sensor unit was unpowered.
To store the sensor unit in an unpowered state, it must be stored under normal temperature/humidity in a clean place away from direct sunlight.
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Galvanic cell type
Do not disassemble the sensor unit because it contains electrolyte. If contact
Sensor unit
Flow
Pump
POWER INPUT (24
VDC)
Power supply part
Gas alarm contact
Alarm contact controller
Transmitter
EA specification)
Amplifier
Controller
Display
Operating unit
4 - 20 mA specification:
(OSU)
occurs, rinse the area immediately with a large quantity of water.
The sensor unit must be stored under normal temperature/humidity in a clean place away from direct sunlight.

3-4 Operation Diagrams

<Electric Diagram>

(ALM1, ALM2) Fault alarm contact (FAULT) * Standard setting of
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contact activation
De-energized
(De-energized at a normal state)
ON-ALARM
(Closed contact at an alarm state)
(4 - 20 mA/NT/
4 - 20 mA DC transmission NT specification: Digital data transmission EA specification: Ethernet and 4-20 mA DC transmission LN specification: confirm to LONWORKS
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Controller
(CPU)
(CPU)
(POWER) (ALM1) (ALM2)
(FAULT)
LCD
(MODE) (▲) (▼) (TEST/SET)
Pump control circuit
sensor

<Tubing Diagram>

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working areas, carefully consider how many units to install and where to install them.
sensor unit.
4

Installation

4-1 Requirements

All users must follow the operating precautions. Ignoring the precautions may damage the detector, resulting in inaccurate gas detection.

CAUTION

After you receive the detector, start using the detector within the specified operation start limit of the

4-2 Precautions for installation sites

CAUTION

This is a precision instrument. Because the detector may not provide the specified performance in some places (environments), check the environment in the installation site, and then take appropriate actions if necessary.
Because the detector plays an important role for safety and disaster prevention, you must install as many units of the detector as needed in appropriate points.
Because gases may leak or collect in different areas depending on the types of gases and the

Do not install the detector in a place with vibrations or shocks.

The detector contains sensitive electronic parts. The detector must be installed in a stable place without vibrations or shocks and where it will not fall.

Do not install the detector in a place exposed to water, oil or chemicals.

Avoid installation locations where the detector is exposed to water, oil or chemicals.

Do not install the detector in a place where the temperature drops below 0ºC or rises over 40ºC.

The operating temperatures of the detector are 0 - 40ºC. The detector must be installed in a stable place where the operating temperatures are maintained and do not change suddenly.
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Do not install the detector in a place exposed to direct sunlight or sudden changes in the temperature.

Avoid installation locations where the detector is exposed to direct sunlight or radiant heat (infrared rays emitted from a high­temperature object), and where the temperature changes suddenly. Condensation may form inside the detector, or the detector cannot adjust to sudden changes in the temperature.

Keep the detector (and its cables) away from noise source devices.

Avoid installation locations where high-frequency/high-voltage exist.

Do not install the detector in a place where maintenance of the detector cannot be performed or where handling the detector involves dangers.

Regular maintenance of the detector must be performed. Do not install the detector in a place where the equipment must be stopped when maintenance is performed, where parts of the equipment must be removed to perform maintenance, or where the detector cannot be removed because tubes or racks prevent access to it. Do not install the detector in a place where maintenance involves dangers, for example, near a high-voltage cable.

Do not install the detector in equipment which is not properly grounded.

Before installing the detector in equipment, the equipment must be grounded properly.

Do not install the detector in a place where other gases exist around it.

The detector must not be installed in a place where other gases exist around it.
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Power supply voltage
or PoE connection (GD-70D-
EA)
Allowed time of
Up to 10 milliseconds (To
detector.)
Example of actions
Others
Do not use it with a power
frequency noise.
Example of actions
Protection against
Take appropriate measures in accordance with the importance of the facilities
Grounding
In addition to lightning, there are more sources of surge noise. To protect devices from these noise sources, the devices must be grounded.
An unstable power supply and noise may cause malfunctions or false alarms.

4-3 Precautions for System Designing

CAUTION

Using a stable power supply

The external output and alarm contact of the detector may be activated when the power is turned on, when momentary blackout occurs, or when the system is being stabilized. In such cases, use a safety power supply, or take appropriate actions on the receiving side. The detector must be provided with the following power supply.
24 VDC ±10% (the terminal voltage of the detector)
momentary blackout
recover from a momentary blackout longer than 10 milliseconds, restart the
supply that has a large power load or high-
To ensure continuous operation and activation, install a protective power supply outside the detector.
Use a line filter to avoid the noise source if necessary.

Heat radiation designing

When it is installed in the closed instrumentation board, attach ventilation fans above and below the board.

Protecting against lightning

If cables are installed outside the factory/plant, or if internal cables are installed in the same duct as the cables coming from outside the factory/plant, lightning will cause problems. Because lightning acts as a large emission source while cables act as a receiving antenna, devices connected to the cables may be damaged. Lightning cannot be prevented. Cables installed in a metal conduit or under the ground cannot be completely protected from a power surge caused by lightning. Although complete elimination of disasters caused by lightning is impossible, the following protective measures can be taken.
lightning
and the environment.
Connect the transmission signal route by using optical fiber.
Provide protection by a lightning arrester (cable safety retainer).
(Although inductive lightning surge can be transmitted through the cable, it is prevented by installing a lightning arrester before the field devices and central processing equipment. For information on how to use a lightning arrester, please contact the manufacturer.)
* The lightning arrester has a circuit to remove a surge voltage which damages field devices, so that
signals may be attenuated. Before installing a lightning arrester, verify that it works properly.
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GD-70D
SK1
SK2
Alarm
Contact
Power
Power
External relay (low voltage relay)
* SK1, SK2: Surge absorbing parts
receiving side of the b contact.
as a CR circuit.
Coil
Load

4-4 Proper use of alarm contact

The alarm contact of the detector is used to transmit signals to activate an external buzzer, alarm lamp or rotating lamp. Do not use the detector for controlling purpose (e.g., controlling the shutdown valve).

CAUTION

The b contact (break contact) under de-energized state may be opened momentarily by a physical shock, such as external force.
When the b contact is selected for the alarm contact, take appropriate actions to prepare for a momentary activation by adding signal delay functionality (approximately one second) to the
The specifications for the alarm contact of the detector are based on the resistive load conditions. If inductive load is used at the alarm contact, the following errors will occur easily because counter electromotive force is generated at the contact.
Deposition, defective insulation or defective contact at the relay contact
Damage of any electric parts due to high-voltage generated inside the detector
Abnormal operations by an out-of-control CPU

CAUTION

In principal, do not activate inductive load at the alarm contact of the detector. (In particular, never use the inductive load to activate a fluorescent lamp or motor.)
If inductive load is activated, relay it with an external relay (contact amplification). However, because the coil of an external relay also involves inductive load, select a relay at a lower voltage (100 VAC or below), and then protect the contact of the detector with an appropriate surge absorbing part, such
If load is to be activated, appropriate measures must be taken to stabilize the operation of the detector and protect the alarm contact referring to the following information.
Relay it with an external relay at 100 VAC or lower (contact amplification). At the same time, the surge absorbing part, SK1, suitable for the specifications must be attached to the external relay.
In addition, the surge absorbing part, SK2, must be attached to the loaded side of the external relay if necessary.
It may be recommended that the surge absorbing part be attached to the contact for certain load conditions. It must be attached to an appropriate position by checking how the load is activated.
supply
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supply
be damaged. Do not forget to remove the caps.
Leave space for the crosshatched area when installing the detector.
resonance between them. In this case, take preventive actions like reinforcing the rack or wall.
Maintenance space
Maintenance space
Maintenance space
Maintenance space
Maintenance space
Maintenance space
When
When installing usi ng 3 screws
(Unit: mm)
(300)
(90)
(300)

4-5 Installing the Detector

NOTE

To use the pyrolyzer unit (PLU-70), also refer to the individual operating manual.

CAUTION

Before installing the detector, remove the protective rubber caps from the GAS IN and GAS OUT fittings. If the detector is turned on while the rubber caps are still in place, the pump and sensor may

<Detector Dimensions and Maintenance Space>

installing using 2 screws

CAUTION

Multiple detectors installed in the same location must be installed at least 5 mm apart. It is recommended that they be 10mm apart.
When you install more than one detector in the same location, install them in a rack or on a wall that is not affected by vibrations. When the detectors are installed side-by-side, if the rack or wall in which the detectors are installed does not have enough strength, vibrations from the pumps inside the detectors can cause
The crosshatched space represents necessary maintenance space.
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Wall
Floor
Ceiling Wall

CAUTION

The detector must be installed in the correct orientation to ensure its performance. Install the detector as shown on the following example. (* The detector must also remain in this orientation during transportation.)
<Correct Installation Orientation>

<Installing the Mounting Plate>

1. Make sure power to the detector is turned off.
2. While pushing the blue lever toward the mounting plate, push the main unit up.
3. If you cannot move the main unit, insert a larger flathead screwdriver into the mounting plate while pushing the lever as shown to the right. Do not rotate or move the flathead screwdriver. Simply insert it into the mounting plate.
4. Remove the silver mounting plate from the back of the GD-70D.
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For 3-wire type (common cable for
specification)
Shielded cable of CVVS, etc. (1.25 mm2) - 3-core
For 2-wire type (power and signal
specification)
Power: Cable of CVV, etc. (1.25 mm2) - 2-core
For 2-wire type DC power-line
specification)
Shielded twisted-pair cable of KPEV-S, etc. (1.25 mm2) ­For Ethernet (EA)
Power: Cable of CVV, etc. (1.25 mm2) - 2-core Signal: Ethernet cable (category 5 or higher)
For PoE (EA)
Ethernet cable (category 5 or higher)
For LONWORKS output cable
Shielded twisted pair cable of KPEV-S, etc. (1.25 mm2)
1P
For contact
Cable of CVV, etc. (1.25mm2) - max. 6-core
When stranded wires are used, prevent wires from contacting each other.
5. Attach the mounting plate to the installation surface using two or three M5 screws.
Recommended mounting screw (M5) Length of 8 mm or more Flat washer of φ10 mm or less (small round)
6. Leave the main unit detached from the mounting plate and continue to the wiring section.

4-6 Wiring the Detector

NOTE

To use the pyrolyzer unit (PLU-70), also refer to the separate operating manual.

CAUTION

Be careful not to damage the internal electronic circuit when wiring. In addition, be careful to provide appropriate strain relief when using cables for wiring.
The power cables and signal cables must not be installed together with the motor power cables, etc. When these cables must be installed together for unavoidable reasons, put the power cables and signal cables in a metal conduit. The conduit must be connected to a grounding circuit.

<Recommended Cable>

power and signal) (4 - 20 mA/EA
cables separated) (4 - 20 mA/EA
Signal: Shielded cable of CVVS, etc. (1.25 mm2) - 2-core
communication system (NT
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1P
Dedicated
handling lever
Wiring hole
Driver slot
Conductive part
Cage
Top handling slot

<Terminal Plate Specifications>

Specifications of terminal plate

Rated voltage: 250 VDC
Rated current: 16 A

Connection conditions

Cable: 0.08 - 2.5mm2
Bare wire length: 8 - 9 mm
Connecting tool: Dedicated handling lever (accessory)

CAUTION

The specified bare wire length must be observed when the wire insulation is peeled off.
Be careful not to separate the wire strands.

Compatible bar terminal

For a bar terminal, the following items are available.
Bar terminal (ferrule): Model 216 Series (manufactured by WAGO)
clamp/spring
Crimping tool: Model VarioCrimp 4 (206-204) (manufactured by WAGO)

CAUTION

A bar terminal of the specified model must be used. Using other bar terminals invalidates the
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guarantee of the performance.
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1 2 3 4 5 6 7 8 9
10
+
+
24 VDC
4 - 20 mA
ALM1
contact
ALM2
contact
FAULT contact
1 2 3 4 5 6 7 8 9
10
+
+
24 VDC
LONWORKS
output
ALM1
contact
ALM2
contact
FAULT contact

<Wiring to the Terminal Plate>

4 - 20 mA/NT/EA Specification
LN Specification

NOTE

For a 3-wire type 4 - 20 mA, terminal 2 is used as common for the power supply and the 4-20 mA output. Therefore, wiring should be connected to terminals 1, 2, and 3 only. Terminal 4 can be left open.
For the NT specification, terminals 3 and 4 are not used.
For the EA specification with PoE connection, terminals 1 and 2 are disabled.

CAUTION

The right tools must be used.
Only one wire can be connected to each wiring hole.
Do not connect a wire anywhere other than a wiring hole.
1. Make sure power to the detector is turned off.
2. While pushing the blue lever toward the mounting plate, push the main unit up.
3. If you cannot move the main unit, insert a larger flathead screwdriver into the mounting plate while pushing the lever as shown to the right. Do not rotate or move the flathead screwdriver. Simply insert it into the mounting plate.
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Push the dedicated
Push the lever with your
While holding down the lever, insert the
lever is released, the wire is secured.
4. Use the handling lever included with the GD-70D or a flathead screwdriver to make wiring connections.
5. Route the wires through the wiring opening in the bottom of the mounting plate.
6. Insert the handling lever into the driver slot associated with the terminal you are wiring.
7. Push the lever toward the terminal plate so the protrusion on the lever goes into the top handling slot and opens the wiring hole. If you are not using the handling lever, push down into the top handling slot with a flathead screwdriver.
8. Hold the lever down while you insert a wire into the wiring hole.
9. Release the lever. Gently pull on the inserted wire to make sure it is connected.
10. Repeat for all other wiring connections.
finger to lower the spring in its inside.
wire into the (round) wiring hole until it reaches the deepest point. Once the
handling lever to open the terminals. Insert 1 wire per terminal.
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AL M2 FAUL T
3
4
5
6
7
8
9
10
+
-
AL M1
4-20mA
Dev i ce
Power
Dev i ce
Power
Al ar m
1
Dev i ce
Al ar m 2
Dev i ce
Fault Al arm
Dev i ce
+ 24
VDC
Control ler
or
Recording
Device
1
+
- (DC Gr ound)
4
- 20 mA
I n ( FB)
GD- 70D Terminal
Plate
DC24V
2
-
Cable Shi eld
Dev i ce
Power

Generic Controller Wiring

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FAUL T
3 4
5 6 7
8 9
10
+
-
AL M1
4-20mA
AL M2
Dev i ce
Power
Dev i ce
Power
Al ar m 1
Dev i ce
Al ar m 2
Dev i ce
Fault
Alarm
Dev i ce
Power Suppl y
1
+
- 24 VDC
+ 24
VDC
Dev i ce
Power
+
-
PLC
or DCS
Cable Shi eld
Cable
Shi eld
GD- 70D
Terminal Plat e
DC24V
2
-

PLC or DCS Wiring

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FAUL T
AL M2
4-20mA
AL M1
-
+
10
9876543
Fault A l arm
Dev i ce
Al ar m 2
Dev i ce
Al ar m 1
Dev i ce
Dev i ce
Power
Dev i ce
Power
13 14
12
+
1
Dev i ce
Power
11
RM-5003
Cable Shi eld
-
2
DC24V
GD- 70D Terminal Plat e

RM-5003 Wiring

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7
6
5
4
3
FAUL T
AL M2
4-20mA
AL M1
-
+ 24
VDC
Fault
Alarm
Dev i ce
Al ar m 2
Dev i ce
Al ar m 1
Dev i ce
Dev i ce
Power
Dev i ce
Power
RJ45
Connec tor
+
10
9
8
Swit c hi ng
Hub
PC or
PLC
+
1
Power Suppl y
Dev i ce
Power
- 24 VDC
-
2
DC24V
GD- 70D Terminal
Plate
Cable Shi eld

Ethernet Wiring

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9
10
+
-
AL M1
4-20mA
AL M2 FAULT
3
4 5
6 7 81
+
Dev i ce
Power
Dev i ce
Power
Al ar m 1
Dev i ce
Al ar m 2
Dev i ce
Fault Al arm
Dev i ce
PC or
PLC
Swit c hi ng Hub
(with PoE
Functi onality)
RJ45
Connec tor
GD- 70D Terminal Plate
DC24V
2
-
Dev i ce
Power

PoE Wiring

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FAUL T
AL M2
AL M1
-
Dev i ce
Power
LON
WORKS
+
10
9
8
7
6
5
4
3
Power
Suppl y
+ 24 VDC
Fault Al arm
Dev i ce
Al ar m 2
Dev i ce
Al ar m
1
Dev i ce
Dev i ce
Power
+
1
Dev i ce
Power
LON
-
24
VDC
-
2
DC24V
GD- 70D
Terminal
Plate
Cable
Shi eld
Cable Shi eld

LON Wiring

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3 4
5 6
7
8 9
10
+ -
AL M14-20mA
AL M2
FAUL T
Dev i ce
Power
Al ar m 1
Dev i ce
Al ar m
2
Dev i ce
Fault Alarm
Dev i ce
1
+
Dev i ce
Power
Blocki ng Filter
(B/F)
+
-
Power Supply
(24 VDC)
DC 24V (-)
DC 24V
(+)
Upper Unit
(RM-70NT)
GD- 70D-NT Terminal Pl ate
DC24V
2
-
Cable Shi el d
+ -
Dev i ce
Power
Position the

RM-70NT Wiring (for GD-70D-NT)

NOTE

<How to Clamp Cables>

1. Insert the supplied zip tie into the hole on the mounting plate as shown in the figure to the right.
2. Position the zip tie so that its coarse side faces the wires.
3. Tighten the zip tie to secure the wires.
When an optional cable gland is used, it must be attached to the external wiring hole.
band so that its coarse side faces the wire.
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Grounding screw (M4)
Bottom
When the main unit is fully
10mm
When reinstalling the main unit,
plate hook before pushing down.
The lock clicks.

<Grounding>

Use the grounding terminal to connect the detector to your grounding circuit.

WARNING

Before turning on the detector, do not forget to connect it to a grounding circuit.
For stable operation of the detector and safety, it must be connected to a grounding circuit. Do not connect the grounding wire to a gas pipe. The grounding must be
made as D type grounding (below 100 Ω of grounding
resistance).

<Attaching Main Unit to Mounting Plate>

1. Make sure power to the detector is turned off.
2. Position the main unit about 10 mm above the mounting plate.
3. Lower the main unit toward the mounting plate. Be sure both mounting plate hooks fit into the main unit grooves.
4. Press down on the main unit to secure it. The lock at the bottom of the main unit clicks to fix it properly.
5. Make sure that the top center of the mounting plate is above the main unit as viewed from front. If it is not, push the main unit down farther.
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align the arrow mark on the side of the housing with the mounting
installed on the mounting plate, the top of the mounting plate will protrude above the main unit.
Ferrule
Tubi ng
Insert
Nut
4 mm x 6 mm Teflon
Tubing
Rc 1/4
(1/ 4 PT)
Thread
Dust Fi l ter
Gas Inlet
To Sample Area

4-7 Making Tubing Connections

NOTE

To use the pyrolyzer unit (PLU-70), also refer to the individual operating manual.
1. The tube nut, ferrule, and tubing insert are shipped uninstalled and the open GAS IN and GAS OUT fittings are plugged with protective rubber caps. Remove the rubber caps from the GAS IN and GAS OUT fittings.
2. Install a short piece of 4 mm x 6 mm Teflon tubing to the GAS IN fitting as shown below. Be sure the tubing insert, ferrule, and nut are installed properly.
3. Connect the dust filter to the tubing.
4. Install another piece of 4 mm x 6 mm Teflon tubing to the other end of the dust filter and route it to the sample area.
5. Attach 4 mm x 6 mm Teflon tubing to the GAS OUT fitting and route it to a safe area. Be sure to use the tubing insert, ferrule, and nut as shown above.
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leading to dangers. Be sure that excessive pressure is not applied to the detector during use.
Please contact RKI for help determining an inlet tubing length.

WARNING

The detector is designed to draw gas under normal atmospheric pressure. If excessive pressure is applied to the GAS IN or GAS OUT fitting, detected gases may be leaked from its inside, thus

CAUTION

Keep the inlet line as short as possible to minimize the absorption of gas by the sample tubing.
When the humidity in the sampling point is high, condensation may be formed inside of the tube.
Make sure to avoid condensation when detecting water-soluble gases such as a strong acid gas, because it may corrode internal parts. Also avoid looping or kinking the tubing.

4-8 Disposal

A used sensor unit (that is not an SSU type) must be treated as hazardous waste. Follow local regulations for disposal.
A used SSU sensor unit must be treated as radioactive waste. Follow local regulations for disposal.
If any liquid leaks from the electrochemical type sensor unit (ESU) or galvanic cell type sensor unit (OSU),
do not touch the liquid. If any liquid leaks while the sensor unit is installed in the detector, turn off power to the detector and contact RKI immediately.
The main unit must be treated as industrial waste. Follow local regulations for disposal.

WARNING

Do not disassemble the electrochemical type sensor unit (ESU) or the galvanic cell type sensor unit (OSU) because they contain electrolyte. Electrolyte may cause severe skin burns if it contacts skin and may cause blindness if it contacts eyes. Electrolyte may damage or discolor clothing. If contact occurs, rinse the area immediately with a large quantity of water.
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OFF
ON
Slide
Switch cover closed.
Switch cover open.
Power switch
5

Operation

5-1 Preparation for Start-up

Before connecting a power supply, read and understand the following precautions. Ignoring these precautions may cause an electric shock or damage the detector.
Connect the detector to a grounding circuit.
Ensure the wiring is correctly connected to the external circuit.
Ensure the main unit is properly installed on the mounting plate.
Ensure the power supply voltage is appropriate (see Specifications).
Alarm contacts may be activated during startup. Take steps to ensure this does not have any unwanted
effects.
Verify that the GAS IN and GAS OUT lines are clear.
Verify that the dust filter is installed correctly.

5-2 Starting Up the Detector

1. The power switch is protected by a cover to prevent accidental access. Rotate the switch cover to gain access to the power switch. (Return the switch cover to the original position once you are done.)
2. Turn ON the power switch.
3. After the detector completes the start-up, it enters Detection Mode.
(under cover)
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Power On
PW
A1
A2
F
LCD
Initial Clear
● ○ ○
──────
Gas
● ○ ○
15.0ppm
Detection Mode
● ○ ○
0.0ppm
started.
PW:POWER
F:FAULT

<Warm-up Sequence>

The warm-up taking approximately 25 seconds to complete.
A1:ALM1 A2:ALM2
WARM UP
Specifications Display
SIH4
SIH4

WARNING

When Oxygen (OSU) is selected, fresh air (20.9 vol%) is the output after the detector is started in the atmosphere. For a specification where an alarm is triggered by the AIR (normal oxygen concentration) output (e.g., 0 - 5 vol%), be careful of an alarm issue after the detector is

CAUTION

Do not turn off the detector during the initial clear. The detector is reading the sensor memory during the initial clear.
If a new sensor unit is installed or the sensor unit is replaced after the detector is started, the sensor unit must be warmed up for a specified period which is determined depending on the type of the sensor unit. Suggested warm-up time for SGU type sensor units is displayed in Maintenance Mode. During the warm-up, the alarm activation and output signals are unstable. Prepare appropriately for false alarms.
Because the pyrolyzer unit (PLU-70) must be warmed up for one hour, please warm it up with the detector.
After the warm-up is completed, verify that the reading on the flow rate indicator corresponds to the specified flow rate, and then perform a gas calibration.
:Lamp on
:Lamp off
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"OFF" the detector.
<<Detection Mode>>
PW
A1
A2
F
LCD
● ○ ○
0.0ppm
<<User Mode>>
PW
A1
A2
F
LCD
● ○ ○
1- 1
MAINTENANCE
<<Maintenance Mode >>
PW
A1
A2
F
LCD
● ○ ○
2- 0
MAINTENANCE
<<Gas Alarm Test Mode>>
PW
A1
A2
F
LCD
● ○ ○
0.0ppm
MAINTENANCE
<<Fault Alarm Status>>
PW
A1
A2
F
LCD
● ○ ○
E-5
<<Gas Alarm Status>>
PW
A1
A2
F
LCD
● ● ○
6.0ppm
MODE TEST
The detector is
MODE
PW:POWER
F:FAULT

5-3 Turning Off the Detector

To turn off the detector, open the switch cover on the bottom of the main unit, and turn "OFF" the power switch. Then, turn off the power supply (24 VDC) to the detector.

WARNING

When the detector is turned off, an alarm may be activated on the upper (central) system. Before turning off the detector, the inhibit (point skip) on the upper (central) system must be activated. Decide whether the power can be turned off by checking the operation of the devices connected to the external output or external contact output terminal of the detector.
If the alarm contact is energized (option), they will activate when the detector is turned "OFF".
If the detected gas is absorptive, the detector must be flushed thoroughly with fresh air before turning

5-4 Basic Operation

After the warmup procedure, the detector enters detection mode.
restarted after recovering from Fault.
SIH4
FLOW
TEST OFF
SIH4
(press and hold)
(press and hold)
A1:ALM1 A2:ALM2
GAS TEST
:Lamp on
:Lamp off
(press and hold)
ZERO
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Mode
Item
LCD Display
Details
Detection Mode
-
Gas concentration Gas name
Normal state
Test Mode
User Mode
Zero Adjustment (Span
1-1 ZERO
oxygen)
Perform the zero adjustment (span adjustment for oxygen).
Sensitivity correction ON/OFF

Flow Rate Indicator

1-3 FLOW
Show the current flow rate.
Address Display
1-4 ADDRESS
Show the address.
Detector Version Display
1-5 70D VER
Show the program version of the main unit.
Unit Version Display
1-6 UNIT VER
Show the program version of the sensor unit.
Net Version Display
1-7 NET VER
Show the program version of the communication function.
Access
this case, you must identify the causes and take appropriate actions.
Flow rate
too low
Flow rate
Normal
flow rate

WARNING

When the detector enters each mode from Detection Mode while an alarm is activated, the alarm contact is released.

<Detection Mode>

Flow Rate Indicator
Because the suction flow rate of the detector is automatically adjusted by the flow rate control function, the flow rate, in principal, does not need to be controlled. As shown on the figure below, when the flow rate does not correspond to the specified flow rate for some reasons, it is adjusted automatically.

CAUTION

If the automatic flow rate adjustment does not work (due to clogged tube or leak), you may get a "FLOW" message (for an unstable flow rate) or an "E-05" message (for flow rate abnormalities). In
too high

5-5 Modes

Details on each mode are provided as follows. (* Operations are slightly different depending on the detector type or sensor unit.)
Gas Alarm
(see pg. 59)
- Gas concentration Perform the alarm test.
Adjustment for oxygen)
Setting Display 1-2 CONFIRM Show the setting of typical menus.
Maintenance Mode
(1-1 SPAN for
First alarm setpoint (AL1)
Second alarm setpoint (AL2)
Alarm delay time
Zero suppression value
Zero follower ON/OFF
1-8 M MODE Enter maintenance mode.
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Mode
Item
LCD Display
Details
Gas Introduction Display
2-0 GAS TEST
Perform the gas introduction test.
Zero Adjustment
2-1 ZERO
Perform the zero adjustment.
Span Adjustment
2-2 SPAN
Perform the span adjustment.
Last Calibrated Date
2-3 LAST CAL
Show the last calibrated date.
Voltage)
(2-4 E VOLT)
(Show the element voltage.)
Flow Rate Setting (adjusted to 0.5 L/min)
2-5 DEF FLOW
Set the flow sensor with the flow rate at 0.5 L/min. Indicator
Detector Temperature
2-7 TEMP
Show the current temperature of the installation environment.
Completion Date/Time
(SGU).
Environmental Setting 1
2-9 SETTING1
Operation settings
Fault test (F TEST)
Pump drive level diagnosis ON/OFF setting (PUMP CK)
Pyrolyzer Data Display
2-11 P L D ATA
If a pyrolyzer unit is being used, this menu displays data for it (see the PLU-70 operator’s manual for more description)
Fault Investigation
2-12 FA U LT
Not used
Factory Mode Switching
2-13 F MODE
Not used
Maintenance Mode (see pg.
67)
Bias Voltage (Element
Pump Ratio/Flow Rate
Suggested Warm-up
Environmental Setting 2 2-10 SETTING2 Function settings
2-4 BIAS
2-6 FLOW Show the output and flow rate of the current pump.
2-8 WARMTIME Show the suggested warm-up completion for semiconductor type
Show the bias voltage.
INHIBIT setting (INHIBIT)
Alarm value setting (ALM P)
Alarm delay time setting (ALM DLY)
Regular replacement operation (pump stop) (MAINTE)
Address setting (ADDRESS)
Date/Time setting (DAY TIME)
Zero suppression value setting (SUPPRESS)
Zero suppression system setting (SUP TYPE)
Alarm test time contact setting (TEST RLY)
Alarm test time external output setting (TEST4-20)
Energized/De-energized setting (RLY PTRN)
Alarm type setting (ALM TYP)
Alarm activation setting (ALM PTRN)
Alarm value limiter setting (AL LIMIT)
Fault activation setting (FLT PTRN)
Flow rate auto-adjustment setting (AT FLOW)
Zero follower ON/OFF setting (ZERO F)
24 hours zero follower ON/OFF setting (ZERO 24F)
Sensitivity correction ON/OFF setting (S ASSIST)
External output in maintenance mode setting (MNT OUT)
External output adjustment (MA 4-20)
Backlight setting (BK LIGHT)
ETHERNET setting (ETHERNET)
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6

Detection Mode

6-1 Gas Alarm Activation

A gas alarm is activated when the concentration of detected gas reaches or exceeds the alarm setpoint.
This section describes alarms assuming an auto-reset operation.

NOTE

The alarm setpoint (first alarm and second alarm) is factory set.
The alarm delay time (standard: 2 seconds) is enabled in the detector to prevent a false activation. It can be disabled, if desired.

<Display Operation During Alarm Condition>

Gas Concentration Display

The gas concentration is displayed on the LCD. If the concentration is above the detection range (over scale), "∩∩∩∩" is displayed on the LCD instead of the gas concentration.

Alarm Indicator Lamp (ALM1: Red), (ALM2: Red)

When the first alarm setpoint has been reached, the ALM1 LED turns red.
When the second alarm setpoint has been reached, the ALM2 LED turns red.
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<Contact Activation>

The contact is activated when the gas concentration reaches or exceeds the alarm setpoint. The contact activation is reset automatically when the gas concentration drops below the alarm setpoint.

<Contact Activation (Auto-reset)>

In case of Auto-reset setting, the contact is activated when the gas concentration reaches or exceeds the alarm setpoint value. The contact activation is reset automatically when the gas concentration drops below the alarm setpoint value.
NOTE
In DETECTION MODE, select and press one of the following key to reset : “MODE”, “”, “” or “TEST/SET”.
"Alarm Pattern (H-HH)"
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"Alarm Pattern (L-H)"
"Alarm Pattern (L-LL)" (* oxygen deficiency alarm)
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<Contact Activation (Self-latching)>

In case of Self-latching setting, the contact is activated when the gas concentration reaches or exceeds the alarm setpoint value. The alarm indication lamp blinks during warning. It changes to a light after reset is performed. It turns off when the gas concentration drops below the alarm set point value.
"Alarm Pattern (H-HH)"
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"Alarm Pattern (L-H)"
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"Alarm Pattern (L-LL)"

<Response to Gas Alarm>

When a gas alarm is triggered, take actions in accordance with your company’s safety practices for a gas alarm. In general, take the following actions.
1. Check the reading of the detector.

NOTE

If a gas leak is momentary or if the alarm is triggered by noise, the reading may already have dropped by the time you get to the instrument to check it.
2. Based on your company’s safety practices, no one can be allowed to access the monitored zone to ensure safety.
3. If the detector display is still indicating the presence of gas, close the area’s main gas valve, and then verify that the detector’s gas concentration reading dropped.
4. While wearing protective equipment in case gas is still present, use a portable gas detector to ensure the area is free from gas.
5. If you can determine that the leak point is free from dangers, take actions to fix the gas leak.
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* E-5 FLOW (flow rate abnormalities)

6-2 Fault Alarm Activation

A fault alarm is triggered when the detector detects abnormalities.
After a fault alarm is triggered, the FAULT lamp (yellow) lights up and an error message is displayed on the LCD.
Determine the causes and take appropriate actions.
After the detector is successfully returned from the fault, it restarts and goes through a normal warmup procedure.
If the detector has problems and is repeatedly malfunctioning, please contact RKI immediately.

NOTE

For information on error messages and possible malfunctions, see Troubleshooting on page 116.

6-3 External Output Operation

4 - 20 mA/NT/EA Specification
Specifications/Condition 4 - 20 mA (for GD-70D) Power-line communication system
(for GD-70D-NT)
Signal Transmission System Electric current transmission (non-isolated) 2-wire type DC power-line communication
Transmission Path CVVS KPEV-S
Transmission Distance Below 1 km Below 300 m (depending on the system
Connection Load Resistance Below 300 Ω -
Detection Mode (No Alarm) 4 - 20 mA (concentration output) Concentration data
Detection Mode (Gas Alarm) 4 - 20 mA (concentration output) Concentration data, Alarm bits
Initial Clear
Maintenance Mode 2.5 mA setting: 2.5 mA
Alarm Test Output ON setting: 4 - 20 mA (concentration output)
Depending on the setting of
2.5 mA setting: 2.5 mA 4 mA, HOLD, 4-20 mA setting: 4 mA*
4 mA setting: 4mA* HOLD Setting: the previous value retained 4-20 mA setting: 4 - 20 mA (concentration output)
Output OFF setting: In accordance with setting of
Fault Alarm 0.5 mA (Fixed) Fault bits
Inhibit
Power Off 0 mA Signal OFF
Depending on the setting of
2.5 mA setting: 2.5 mA 4 mA, HOLD, 4 - 20 mA setting: 4 mA*
* 17.4 mA for oxygen units
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system
designing conditions)
Initial bit
Concentration data, Adjustment bit
Concentration data, Adjustment bit, Test bit
Concentration data, Adjustment bit, Inhibit bit
Specifications
LONWORKS (LN)
Signal
method
Transmission path
Transmission rate
Transmission distance
Max 2700m * When bus topology (Double ended termination ) is used.
Connection load resistance
Maintenance output setting
Sensor unit
Details
2.5 mA
Use OSU (L-LL, L-H).
Output 2.5 mA during maintenance or inhibit.
alarm)
4 mA, HOLD, 4 - 20 mA
Specification change
When changing from a H-HH alarm pattern to
change message is confirmed.
Specification change
When changing from an L-LL or L-H alarm
“C-02” change message is confirmed.
2.5mA 4mA
20mA
22mA
Full scale
Gas concentration
External output
Zero suppression
Detection mode
Maintenance
LN Specification
transmission
LONWORKS
KPEV-S
78kbps
Example of Gas Concentration and External Output 4 - 20 mA Specification (Maintenance output: 2.5 mA setting)

CAUTION

<<4 - 20 mA Specification>>
The 4 - 20 mA output is already adjusted. In case of over scale, an output will not exceed 22 mA.
Output during inhibit or warmup is based on 4 - 20 mA output setting in Maintenance Mode.
The output may drop as low as 2.5 mA during warmup for oxygen units. Understand how the detector functions, and take actions to prepare for false alarms.
Special Cases>
<
Possibility of false alarm in the upper unit (L
(To OSU - 0 - 25 vol%)
an L-LL or L-H alarm pattern, 4 mA (equivalent of concentration zero) is used until the “C-02”
(From OSU - 0 - 25 vol%)
pattern to a H-HH alarm pattern, 17.4 mA (equivalent of approx. 84%FS) is used until the
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GD-70D-
Power-line
system
The detector is used in a local network formed with a multi-display unit (RM-
multi-display unit.
GD-70D-
Ethernet
The detector offers functions that work in liaison with external software using
value or perform calibration and test.
GD-70D-
LONWORKS
An internationally standardized network specification for device control. It is a
flexibility.
<Communication Specifications>
NT
EA
LN
communication
70NT) as the base unit. For more information, see the operating manual of the
a standard network protocol. For details, see the separate manual for communication function. Web function (HTTP), mail send function (SMTP), and time synchronization
function (SNTP) Use a Web browser of an upper-unit PC to view and change setting values and perform calibration and test on a graphical user interface. SMTP, when receiving a gas alarm or fault alarm from an external mail server, can send a notification mail to a registered address. SNTP, receiving time information from a time server, can correct the clock at regular intervals. Modbus slave function (Modbus/TCP) Works as a Modbus slave and feeds back a setting value in response to a read request or changes a setting value in response to a write request.
PLC linkage function (FINSMC) Sends a setting value to PLC to provide information to be processed by PLC
in a ladder program. Reading from PLC is also available to change a setting
network specification that controls and manages not only gas detectors but also air conditioning, lighting etc. equipment by the same communication protocol called Lon-talk. By constructing an open system, it becomes possible to connect the system without being bound by one manufacturer, it is possible to facilitate procurement of parts at the time of equipment failure, and to increase design
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<<Example: SiH4 0 - 15 ppm range>>
0.5ppm
SIH4
Suppression Disabled
0.0ppm
SIH4
Suppression Enabled

6-4 Other Functions

<Suppression Function>

Some sensors are influenced by environmental changes (temperature, humidity, and other characteristics) or interference gases which may cause the reading to vary in fresh air.
The suppression function is used to hide (suppress) the variation of the reading under the set suppression value, so that the display indicates zero (or 20.9% for oxygen) until the reading exceeds the set suppression value.
The factory setting for the suppression function is OFF for every gas type except for oxygen.
A variation around zero is displayed as the reading.
A variation under the set suppression value (ie. 6% of full scale or 0.9 ppm for SiH4) is shown as zero.

CAUTION

If the zero reading is BELOW zero, the reading will not change until the reading reaches -10% of full scale.
A reading that is -10% of full scale is displayed as "-0.0".
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sensor. To correct the sensitivity variation, you must regularly calibrate the sensor.
* The zero drift is periodically corrected to bring the
reading back to zero.
Zero Follower On
Zero Follower Off
* The zero drift of the sensor appears as the reading.
Reading
Zero point
0
Time
Zero
0 Reading
Time
Sensitivity Correction Off
* Sensor accuracy decreases.
Sensitivity Correction On
* The span is periodically lifted to
increase sensor accuracy.
0
Time
Gas correction Reading
Gas correction 0
Reading
Time

<Zero Follower Function>

Some sensors (ESU, SSU, NCU, and IRU types) have sensitivity variations after being used for a long period of time.
The zero follower function uses program manipulation to correct for sensitivity variations in the zero reading.
<Sensitivity Correction
point
Function>
ESU type sensors have sensitivity variations after being used for a long period of time.
The sensitivity correction function compensates for decreasing gas sensitivity as the sensor gets older. It periodically adjusts the span based on the degradation pattern of the sensor.

CAUTION

The sensitivity correction is just an auxiliary function. It uniformly lifts the span up based on the sensor’s degradation pattern only. Sensitivity correction cannot consider the sensitivity variation of an individual
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Unit Replacement
1. Press the MODE key to confirm the new sensor unit and start the monitor.
sensor might have been installed by mistake.
C-02
MAINTENANCE
Specification Change
might mean there is an installation error. Check the sensor installation.
ESU SSU NCU SGU OSU
OSU
(0 - 5 vol%)
OSU
(0 - 50 vol%)
Alarm delay
2­second
2-second
2-second
2­second
2­second
2­second
2­second
Suppression value
6%FS 2 ppm
(TEOS)
6%FS
(0-100%LEL)
10%FS
0.5 vol%
0 vol%
0 vol% Alarm type
H-HH H-HH H-HH H-HH L-LL H-HH H-HH
IRU
500ppm)
SHU
2000ppm)
Alarm delay
2­second
2-second
Suppression value
30 ppm
200 ppm Alarm type
H-HH
H-HH

<Calibration History/Alarm Trend History/Event History Functions>

The detector and the sensor unit have their own history functions. To use these functions, contact RKI.

<Sensor Unit Automatic Recognition Function>

The detector can automatically recognize when a new sensor has been installed. If a replacement sensor of the same type is installed, the detector will display a “C-01 CHG UNIT” message. If a different type sensor is installed, the detector will display a “C-02 CHG SPEC” message.
C-01
CHG UNIT
MAINTENANCE
Displayed when a unit with the same specification (principle, type, range, and so on) is attached (e.g. in a regular replacement).
The following is displayed alternately if the unit that you installed has the same or earlier date of manufacture than the one that has been replaced.
"CHG UNIT" <=> "USED SEN"
*** Check for correct installation if this message is displayed because an old
Displayed when a unit with a different specification (principle, type, range, and
CHG SPEC
so on) from the previous one is attached.
1. Press the MODE key to confirm the new specification and start the monitor.
If you did not install a sensor unit with a different specification, this message

CAUTION

If you get a “C-02” message and confirm the specification change by pressing the MODE key, the specification of the gas detector head is changed. The following parameters are changed to their standard settings. If you want to use nonstandard settings, set them in Maintenance Mode.
Alarm setpoints (ALM P)
Alarm delay time setting (ALM DLY)
Suppression value (SUPPRESS)
Alarm type (ALM TYP) ...... The OSU specification includes "L-LL", "L-H", and "H-HH".
<Standard Setting Values by Principle>
(0-
(0-
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PW
A1
A2
F
LCD
Detection mode
○ ○ ○
0.0ppm
1-1.ZERO
○ ○ ○
1- 1
MAINTENANCE
Zero Adjustment

6-5 About LONWORKS (LN specification)

Binding method

WARNING

User mode
Press the MODE key
for 3 seconds.
When adjustment is completed, press the MODE key and be sure to return to detection
mode.
(When left in user mode, it automatically returns to detection mode after 10 hours.
SIH4
)
User mode
Perform the zero adjustment.
To reissue the neuron ID, please press the MODE key in user mode for 3 seconds, return to the detection mode, and enter the user mode again.
ZERO
SET
⇒P51
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Open-lLoop Sensor Functional Block
GD-70D-LN LonWorks Diagram
Virtual Function
Block
Mandato ry
Implementation Specific
nviReset
SNVT_lev_disc
nvoConc
SNVT_ppm_f
nvoNstate
SNVT_state
nvoAlarmS
SNVT_switch
nviComand
SNVT_str_asc
nciMaxSendTM
SNVT_time_sec
nciMinSendTM
SNVT_time_sec
nciMaxSendTl
SNVT_time_sec
nciMinSendTl
SNVT_time_sec
nvoFaultS
SNVT_switch
nvoGasName
SNVT_str_asc
nvoHertBeat SNVT_state
nvoComand
SNVT_str_asc
nciMaxSendHB
SNVT_time_sec
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It is the same as the current density output.
part.
It is the same as the current density output. Status of 16 BIT expresses measurement unit, alarm, breakdown etc.
Expression of alarm state by switch
1st & 2nd: {2.0,1}
Expression of fault condition by switch
: 9.0 = System fault
Send measured gas name and measurement unit in ASCII character
and the rest is ASCIL(00H = NULL)
Count up 8 BIT of 0 to 7 of 16 BIT
8 to 15 BIT is reserved.
7
nviReset
SNVT_lev_disc
RESET signal in case of self-latching 0:non not 0:RESET
8
nciMaxSendTM
SNVT_time_sec
1 and 2 update maximum time
9
nciMinSendTM
SNVT_time_sec
1 and 2 update minimum time
10
nciMaxSendTI
SNVT_time_sec
3 ~ 5 update maximum time
11
nciMinSendTI
SNVT_time_sec
3 ~ 5 update minimum time
5
nciMaxSendHB
SNVT_time_sec
6 update maximum time
13
nviComand
SNVT_str_asc
Command input of ASCII 30 byte
14
nvoComand
SNVT_str_asc
Command output of ASCII 30 byte
NO. Variable name Variable type Contents
1 nvoConc SNVT_ppm_f
2 nvoNstate SNVT_state
3 nvoAlarmS SNVT_switch
4 nvoFaultS SNVT_switch
5 nvoGasName SNVT_str_asc
6 nvoHertBeat SNVT_state
Floating point of 16 BIT synchronizes with the display of the detection
OFF:{0.0,0}
:{1.0,1}
1st
2nd :{1.5,1}
Normal{0.0,0} Fault:{X.X,1} - - X.X : 1.0 = Sensor fault : 5.0 = Flaw rate fault : 7.0 = Pyrolyzer fault
string. From the beginning, we send unit after space (20H) with gas name
Count every second and count it. If it is OVER, start with 0.
You can select the transmission status with the combination of the setting point of nciMaxSendTM (8) and
nciMinSendTM (9).
・nciMaxSendTM (8) = Asec nciMinSendTM (9) = Bsec --> (1) and (2) transmit every Asec when
there is no VAL update. If Bsec has not elapsed since last transmission, wait until Bsec has elapsed before sending it even if VAL is updated.
nciMaxSendTM (8) Asec nciMinSendTM (9) = 0sec --> (1) and (2) transmit every Asec when
there is no VAL update. If there is an update of VAL, it will be sent immediately.
nciMaxSendTM (8) 0sec nciMinSendTM (9) = Bsec --> (1), (2) don’t transmit every Asec
when there is no VAL update. If Bsec has not elapsed since last transmission, wait until Bsec has elapsed before sending it even if VAL is updated.
You can select the transmission status with the combination of the setting point of nciMaxSendTI (10) and
nciMinSendTI (11).
nciMaxSendTI (10) Asec nciMinSendTI (11) = Bsec --> (3) ~ (5) transmit every Asec
when there is no VAL update. If Bsec has not elapsed since last transmission, wait until Bsec has elapsed before sending it even if VAL is updated.
nciMaxSendTI (10) Asec nciMinSendTI (11) = 0sec --> (3) ~ (5) transmit every Asec when
there is no VAL update. If there is an update of VAL, it will be sent immediately.
nciMaxSendTI (10) 0sec nciMinSendTI (11) = Bsec --> (3) ~ (5) don’t transmit every Asec
when there is no VAL update. If Bsec has not elapsed since last transmission, wait until Bsec has elapsed before sending it even if VAL is updated.
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You can select the transmission status with the setting point of nciMaxSendHBb(12)
nciMaxSendHB (12) = Asec --> (6) transmit every Asec. nciMaxSendHB (12) = 0sec --> (6) don’t transmit every Asec.
It outputs to nvoComand (14) for input data of nviComand (13).
・nviComand (13) = "A1, R," --> nvoComand (14) = "A1, R, ××××" ××× express 1st alarm point read value in hexadecimal. ・nviComand (13) = "A2, R," --> nvoComand (14) = "A2, R, ××××" ×××× express 2nd alarm point read value in hexadecimal.
・nviComand (13) = "AD, R," --> nvoComand (14) = "AD, R,××××"
×××× express Alarm delay time (mesc 10 units) read value in hexadecimal.
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PW
A1
A2
F
LCD
Detection Mode
● ○ ○
0.0ppm

Alarm Test Mode

pressing the ▲ or ▼ key.
● ○ ○
0.0ppm
MAINTENANCE
First Alarm
● ○ ○
5.0ppm
MAINTENANCE
Second Alarm
alarm contact is activated.)
● ○ ○
10.0ppm
hours.)
7
Alarm Test Mode
Alarm Test Mode generates dummy signals that imitate gas concentration signals in order to check the alarm LED activation and the transmission to external circuits.

WARNING

Before starting the alarm test (transmission test), prepare for false alarms by disabling alarms or
Be sure that the TEST RLY and TEST4-20 items in Maintenance Mode are set appropriately.
alerting appropriate personnel.
After the test is completed, do not forget to press the TEST key to return to Detection Mode. (If the detector remains in the alarm test mode, it automatically returns to Detection Mode in ten

7-1 Alarm Test Mode

Press the TEST key for three seconds.
"TEST ON" is displayed when the alarm contacts will activate during the alarm test. "TEST OFF" is displayed when the alarm contacts will not activate during the alarm test. (The setting can be changed in the TEST RLY menu item in Maintenance Mode.)
Increase or decrease the reading by
When the reading reaches the first alarm, the ALM1 lamp lights up. (When TEST RLY is set to ON, the first alarm contact is activated.)
SIH4
TEST OFF
TEST OFF
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When the reading reaches the second alarm, the ALM2 lamp lights up. (When TEST RLY is set to ON, the second
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TEST OFF
MAINTENANCE
Return to Detection Mode
Press the TEST key for 3 seconds.
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PW
A1
A2
F
LCD
Detection Mode
● ○ ○
0.0ppm
User Mode
1-1.ZERO
● ○ ○
1- 1
MAINTENANCE
Zero Adjustment
↓ ↑▼
● ○ ○
1- 2
MAINTENANCE
Setpoint Display
↓ ↑▼
● ○ ○
1- 3
MAINTENANCE
0.50
MAINTENANCE
↓ ↑▼
● ○ ○
1- 4
MAINTENANCE
01
MAINTENANCE
↑▼
After the adjustment is completed, do not forget to press the MODE key to return to Detection Mode.

WARNING

8-1 User Mode

8

User Mode

Press the MODE key for three seconds.
Perform the zero adjustment.
1-2.CONFIRM
Show the typical setpoint.
1-3.FLOW
Show the current flow rate.
SIH4
ZERO
CONFIRM
FLOW
SET
SET
SET
P62
P63
L/M
1-4.ADDRESS
Show the address. (for GD-70D-NT)
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ADDRESS
SET
ADDRESS
● ○ ○
1- 5
MAINTENANCE
01234
MAINTENANCE
↓ ↑▼
● ○ ○
1- 6
MAINTENANCE
01234
MAINTENANCE
↑▼
(for GD-70D-NT)
● ○ ○
1- 7
MAINTENANCE
01234
MAINTENANCE
↑▼
1-8.M MODE
● ○ ○
1- 8
MAINTENANCE
See Maintenance
↑▼
To 1-1.ZERO
In case of GD-70D-EA
1-7. NET VER
(NT specification)
● ○ ○
1- 7
01234
1-8.COM SET
confirm the value.
● ○ ○
1- 8
A
▲↓↑▼
A: Analog transmission
E
MAINTENANCE
▲↓↑▼
EA
MAINTENANCE
1-5.70D VER
Show the program version of the main unit.
1-6.UNIT VER
Show the program version of the installed sensor unit.
1-7.NET VER
Show the program version of the communication function.
Enter Maintenance Mode.
70D VER
UNIT VER
NET VER
M MODE
SET
SET
SET
SET
56AB
56AB
----
Mode on page 65.
【 】
Show the program version of the communication function.
Set communication output. Press the or ▼ key to select the communication output, and then press the SET key to
E: Ethernet EA: Ethernet and analog transmission
NET VER
MAINTENANCE
↓↑
COM SET
MAINTENANCE
|↑ ||
||
SET
----
MAINTENANCE
SET
COM SET
MAINTENANCE
COM SET
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COM SET
1-9. M MODE
○ ○ ○
1- 9
MAINTENANCE
See Maintenance
To 1-1. ZERO
Switch to the regular maintenance mode.
M MODE
↓↑
SET
Mode on page 65.
NOTE
Communication output setting 1-8 (COM SET) is displayed only for EA specification.
In EA specification, if only analog transmission is used (Ethernet is not used), if the communication
output setting is set to A, Communication Abnormalities E-6 does not occur even if an Ethernet cable
is not connected.
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PW
A1
A2
F
LCD
From Detection Mode, press the
● ○ ○
0.0ppm
1-1.ZERO
● ○ ○
1- 1
MAINTENANCE
Current Concentration Value
● ○ ○
1.1ppm
MAINTENANCE
Zero Adjustment Completed
● ○ ○
0.0ppm
MAINTENANCE
Return to 1-1.ZERO
* If the zero adjustment fails.
● ○ ○
0.0ppm
MAINTENANCE
Return to 1-1.ZERO

<Zero Adjustment "1-1">

This is used to perform the zero adjustment. Before starting the zero adjustment, let the detector draw fresh air or zero air until the reading is stable. For oxygen units, "1-1" is called the span adjustment instead of the zero adjustment. In this case, fresh air or zero air must be applied to the detector to ensure the reading is 20.9 vol%. For information on the span adjustment, see Maintenance on page 86.

Zero Adjustment

MODE key for three seconds.
SIH4
Press the SET key.
ZERO
Display
Press the SET key to perform the zero adjustment.
The menu returns to 1-1.ZERO automatically.
ZERO SET
ZERO OK
ZERO NG
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PW
A1
A2
F
LCD
From Detection Mode, press the
● ○ ○
0.0ppm
1-1.ZERO
● ○ ○
1- 1
MAINTENANCE
1-2.CONFIRM
● ○ ○
1- 2
MAINTENANCE
First Alarm Setpoint
● ○ ○
5.0ppm
MAINTENANCE
↑▼
Second Alarm Setpoint
● ○ ○
10.0ppm
MAINTENANCE
↑▼
Alarm Delay Time (seconds)
● ○ ○
2
MAINTENANCE
↑▼
Zero Suppression Value
● ○ ○
0.9ppm
MAINTENANCE
↑▼
Zero Follower ON/OFF
● ○ ○
ON
MAINTENANCE
↑▼

<Setpoint Indicator "1-2">

Use this menu item to check important setpoints. Setpoints cannot be changed in User Mode.

Setpoint Display

MODE key for three seconds.
SIH4
Press the ▼ key.
ZERO
Press the SET key.
CONFIRM
AL 1
AL 2
ALM DLY
SUPPRESS
(If ESU or SSU sensor installed)
ZERO F
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Sensitivity Correction ON/OFF
● ○ ○
OFF
MAINTENANCE
↑▼
To First Alarm
Setpoint Indicator
(If ESU sensor installed)
S ASSIST
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Maintenance Mode Item
LCD Display
Details
Gas Introduction Display
2-0 GAS TEST
Perform the gas introduction test in the regular maintenance mode.
Zero Adjustment
2-1 ZERO
Perform the zero adjustment. Span Adjustment
2-2 SPAN
Perform the span adjustment.
Last Calibrated Date
2-3 LAST CAL
Show the last calibrated date.
Bias Voltage
2-4 BIAS
Show the bias voltage.
Flow Rate Setting (adjusted
2-5 DEF FLOW
Set the flow sensor with the flow rate at 0.5 L/min.
Pump Ratio/Flow Rate
2-6 FLOW
Show the output and flow rate of the current pump.
Detector Temperature
2-7 TEMP
Show the current temperature of the installation environment.
Suggested Warm-up
2-8 WARMTIME
Show the suggested warm-up completion for SGU type
Environmental Setting 1
2-9 SETTING1
Operation settings
Fault alarm test (F TEST) P73
(If the detector remains in Maintenance Mode, it automatically returns to Detection Mode in ten hours.)
9

Maintenance Mode

WARNING

After the adjustment is completed, do not forget to press the MODE key to return to Detection Mode.
⇒P86Error! Bookmark not defined.
⇒P86
(Element Voltage)
to 0.5 L/min)
P110
Indicator
P110
Completion Date/Time
P70
(2-4 E VOLT)
(Show the element voltage.)
sensors.
INHIBIT setting (INHIBIT)
Alarm value setting (ALM P)
Alarm delay time setting (ALM DLY)
Pump stop (MAINTE)
P71
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Maintenance Mode Item
LCD Display
Details
Environmental Setting 2
2-10 SETTING2
Function settings
Pump drive level diagnosis ON/OFF setting (PUMP CK)
Pyrolyzer Data Display
2-11 PL DATA
When the pyrolyzer unit (PLU-70) is used, a variety of
(See the operating manual for PLU-70)
Fault Investigation
2-12 FAULT
Not used
Factory Mode Switching
2-13 F MODE
Not used
P74
Address setting (ADDRESS)
Date/Time setting (DAY TIME)
Zero suppression value setting (SUPPRESS)
Zero suppression type setting (SUP TYPE)
Alarm test mode contact setting (TEST RLY)
Alarm test mode external output setting (TEST4-20)
Energized/De-energized setting (RLY PTRN)
P79
P81
Alarm type setting (ALM TYP)
Alarm activation setting (ALM PTRN)
Alarm value limiter setting (AL LIMIT)
Fault activation setting (FLT PTRN)
Flow rate auto-adjustment setting (AT FLOW)
Zero follower ON/OFF setting (ZERO F)
24 hours zero follower ON/OFF setting (ZERO 24F)
Sensitivity correction ON/OFF setting (S ASSIST)
External output in maintenance mode setting (MNT OUT)
External output adjustment (MA 4-20)
Backlight setting (BK LIGHT)
ETHERNET setting (ETHERNET)
pyrolyzer data is displayed.
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PW
A1
A2
F
LCD
From Detection Mode, press
● ○ ○
0.0ppm
screen is item 1-9.)
● ○ ○
1- 8
User Mode
● ○ ○
1- 8
MAINTENANCE
Then press and hold the SET
● ○ ○
- - - -
MAINTENANCE
2-0.GAS TEST
● ○ ○
2- 0
MAINTENANCE
0.2ppm
MAINTENANCE
(Alternate Display)↑
0.2ppm
MAINTENANCE
2-1.ZERO
● ○ ○
2- 1
MAINTENANCE
Zero Adjustment
↑▼
2-2.SPAN
● ○ ○
2- 2
MAINTENANCE
Span Adjustment
↑▼
PW: POWER
F: FAULT
: Lamp on

Maintenance Mode

and hold the MODE key for three seconds.
1-8.M MODE
Press the key until the Maintenance Mode screen displays. (For GD-70D-EA units, the Maintenance Mode
In "1-8.M MODE", press the SET key.
SIH4
M MODE
MAINTENANCE
M MODE
A1: ALM1 A2: ALM2
: Lamp off
key again for three seconds.
Maintenance Mode
Perform a test with the gas. The reading changes and the alarm lamp lights up, but the alarm contacts are not activated and the 4-20 mA output does not track the changes.
Perform a zero adjustment.
M MODE
GAS TEST
ZERO
SET
SET
GAS TEST
SIH4
P86
Perform a span adjustment.
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SPAN
SET
P86
2-3.LAST CAL
● ○ ○
2- 3
MAINTENANCE
12:00
MAINTENANCE
↑▼
2-4.BIAS
● ○ ○
2- 4
MAINTENANCE
0 mV
MAINTENANCE
↑▼
2-5.DEF FLOW
cancel this menu.)
● ○ ○
2- 5
MAINTENANCE
1000
MAINTENANCE
2-6.FLOW
● ○ ○
2- 6
MAINTENANCE
50 %
MAINTENANCE
↑▼
2-7.TEMP
● ○ ○
2- 7
25.0 °C
MAINTENANCE
↑▼
2-8. WARMTIME
● ○ ○
2- 8
MAINTENANCE
12:00
↑▼
2-9. SETTING1
● ○ ○
2- 9
MAINTENANCE
Environmental
↓ ↑▼
Show the most recent calibration date.
Show the bias voltage "BIAS" of electrochemical type (ESU) or the element voltage "EVOLT" of semiconductor type (SGU) and hot-wire semiconductor type (SHU).
LAST CAL
BIAS
SET
2009.01.01
SET
BIAS
Set the flow rate to the default value when the flow sensor is replaced, etc. Normally, this is not used because the detector has already been adjusted. On the other hand, if the flow meter is set at other than the specified flow rate, gases cannot be detected properly due to an incorrect flow rate. (Press the MODE key to
Show the output and flow rate of the current pump.
Show the temperature of the detector.
DEF FLOW
FLOW
TEMP
MAINTENANCE
SET
DEF FLOW
SET
0.50 L/M
SET
TEMP
Show the suggested warm-up completion date/time for semiconductor type (SGU), and hot-wire semiconductor type (SHU) which requires a long warm-up time.
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Enter the environmental setting 1 menu.
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WARMTIM
E
SETTING1
SET
SET
2009.01.01
MAINTENANCE
Setting 1 P71
2-10.SETTING2
● ○ ○
2-10
MAINTENANCE
Environmental
↑▼
2-11.PL DATA
● ○ ○
2-11
For information on
Manual".
↑▼
2-12.FAULT
● ○ ○
2-12
MAINTENANCE
↑▼
2-13.F MODE
● ○ ○
2-13
MAINTENANCE
↑▼
To 2-0.GAS TEST
Enter the environmental setting 2 menu.
Show the pyrolyzer data when the pyrolyzer unit (PLU-
70) is used.
This is used (by the manufacturer) to investigate and analyze the causes of faults. This is not used by the user.
SETTING2
PL DATA
MAINTENANCE
FAULT
SET
SET
Setting 2 P74
Pyrolyzer Data Display, see "PLU­70 Operating
Changes to the factory mode. This is not used by the user.
F MODE
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PW
A1
A2
F
LCD
From Detection Mode, press
● ○ ○
0.0ppm
1-8.M MODE
screen is item 1-9.)
● ○ ○
1- 8
User Mode
● ○ ○
1- 8
MAINTENANCE
Then press and hold the SET
● ○ ○
- - - -
MAINTENANCE
2-0.GAS TEST
● ○ ○
2- 0
2-9.SETTING1
Press the SET key.
● ○ ○
2- 9
SET 0.INHIBIT
● ○ ○
SET 0
MAINTENANCE
OFF
MAINTENANCE
▲↓↑▼
ON
INHIBIT

9-1 Environmental Setting 1 "2-9"

The Environmental Setting 1 menu allows you to view and/or change operation settings.

Environmental Setting 1

and hold the MODE key for three seconds.
SIH4
Press the key until the Maintenance Mode screen displays. (For GD-70D-EA units, the Maintenance Mode
In "1-8.M MODE", press the SET key.
M MODE
MAINTENANCE
M MODE
key again for three seconds.
The first item in Maintenance Mode will display.
Press the key until the SETTING1 screen displays.
Select either ON or OFF, and then press the SET key to confirm the selection. When ON is selected, the message INHIBIT is displayed on the LCD. Any alarms triggered in Detection Mode are not communicated to the relays or to the 4-20 mA output.
M MODE
GAS TEST
MAINTENANCE
SETTING1
MAINTENANCE
SET
INHIBIT
↓ ↑
INHIBIT
INHIBIT
MAINTENANCE
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SET 1.ALM P
● ○ ○
SET 1
MAINTENANCE

Alarm Value Setting

↑▼
SET 2.ALM DLY
● ○ ○
SET 2
MAINTENANCE
2
MAINTENANCE
↑▼
SET 3. MAINTE
and restart the pump.)
● ○ ○
SET 3
MAINTENANCE
-----
MAINTENANCE
Pump Stop
SET 4.F TEST
● ○ ○
SET 4
MAINTENANCE
Fault Alarm Test
To
SET 0.INHIBIT Setting
PW
A1
A2
F
LCD
From Detection Mode, press and hold
● ○ ○
0.0ppm
1-8.M MODE
item 1-9.)
● ○ ○
1- 8
User Mode
● ○ ○
1- 8
MAINTENANCE
Change the alarm setpoints.
Set the alarm delay time. Use the ▲ or ▼ key to change the value (in seconds), and then press the SET key to confirm the value.
This is used to stop the pump (useful for pump replacement). Press the SET key to stop the pump. Press the SET key again to restart the pump. (You can also press the MODE key to exit this menu
ALM P
ALM DLY
MAINTE
SET
SET
SET
P71
ALM DLY
MAINTE
(Drive Sound Stop)
Perform a fault alarm test.
F TEST

9-2 Alarm Value Setting "2-9" - "SET 1"

Alarm Value Setting
the MODE key for three seconds.
SIH4
Press the key until the Maintenance Mode screen displays. (For GD-70D-EA units, the Maintenance Mode screen is
M MODE
MAINTENANCE
SET
P73
In "1-8.M MODE", press the SET key.
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M MODE
Then press and hold the SET key again
● ○ ○
- - - -
MAINTENANCE
2-0.GAS TEST
● ○ ○
2- 0
MAINTENANCE
2-9. SETTING1
Press the SET key.
● ○ ○
2- 9
● ○ ○
SET 1
MAINTENANCE
SET 1.ALM P
● ○ ○
SET 1
MAINTENANCE
First Alarm Value Setting
this menu.)
● ○ ○
5.0ppm
MAINTENANCE
Second Alarm Value Setting
this menu.)
● ○ ○
10.0ppm
MAINTENANCE
Return to
SET 1.ALM P
for three seconds.
M MODE
The first item in Maintenance Mode will display.
Press the key until the SETTING1 screen displays.
SET 1.ALM P
Press the key until the ALM P screen displays.
GAS TEST
SETTING1
MAINTENANCE
ALM P
Press the SET key.
Use the or key to change the setpoint. Press the SET key to confirm the value. (Press the MODE key to skip
Use the ▲ or ▼ key to change the setpoint. Press the SET key to confirm the value. (Press the MODE key to skip
ALM P
AL 1
AL 2
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PW
A1
A2
F
LCD
From Detection Mode, press and hold
● ○ ○
0.0ppm
1-8.M MODE
item 1-9.)
● ○ ○
1- 8
User Mode
● ○ ○
1- 8
MAINTENANCE
Then press and hold the SET key again
● ○ ○
- - - -
MAINTENANCE
2-0.GAS TEST
● ○ ○
2- 0
MAINTENANCE
Press the SET key.
● ○ ○
2- 9
● ○ ○
SET 1
MAINTENANCE
SET 4.F TEST
● ○ ○
SET 4
MAINTENANCE

9-3 Fault Alarm Test "2-9" - "SET 4"

the MODE key for three seconds.
SIH4
Press the key until the Maintenance Mode screen displays. (For GD-70D-EA units, the Maintenance Mode screen is
In "1-8.M MODE", press the SET key.
M MODE
MAINTENANCE
M MODE
for three seconds.
The first item in Maintenance Mode will display.
2-9. SETTING1
Press the key until the SETTING1 screen displays.
SET 1.ALM P
Press the key until the F TEST screen displays.
M MODE
GAS TEST
SETTING1
MAINTENANCE
F TEST
Press the SET key.
F TEST
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Fault Test ON/OFF
● ○ ○
OFF
MAINTENANCE
↓ ↑
● ○ ○
ON
MAINTENANCE
PW
A1
A2
F
LCD
From Detection Mode, press
● ○ ○
0.0ppm
1-8.M MODE
screen is item 1-9.)
● ○ ○
1- 8
User Mode
● ○ ○
1- 8
MAINTENANCE
Then press and hold the SET
● ○ ○
- - - -
MAINTENANCE
With ON displayed, press the SET key to activate the fault alarm. With OFF displayed, press the SET key to deactivate the fault alarm. (You can also press the MODE key to cancel this menu and go back to the original state.)
F TEST
F TEST

WARNING

Because the contact (fault) can be activated only by a fault alarm test in Maintenance Mode, be careful to perform the test. The fault alarm test cannot be performed during inhibit.

9-4 Environmental Setting 2 "2-10"

The Environmental Setting 2 menu allows you to view and/or change function settings. (* It is recommended that any setting changes made be recorded in a log.)
Settings found in the Environmental Setting 2 menu are factory set and do not normally need to be changed. Be careful not to change these settings by mistake.

Environmental Setting 2

and hold the MODE key for three seconds.
SIH4
Press the key until the Maintenance Mode screen displays. (For GD-70D-EA units, the Maintenance Mode
M MODE
MAINTENANCE
In "1-8.M MODE", press the SET key.
key again for three seconds.
M MODE
M MODE
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2-0.GAS TEST
● ○ ○
2- 0
MAINTENANCE
Press the SET key.
● ○ ○
2- 10
SET 0. ADDRESS
● ○ ○
SET 0
MAINTENANCE
01
MAINTENANCE
SET 1.DAY TIME
● ○ ○
SET 1
MAINTENANCE
Date/Time Setting
↑▼
SET 2.SUPPRESS
● ○ ○
SET 2
MAINTENANCE
0.9ppm
MAINTENANCE
SET 3. SUP TYPE
● ○ ○
SET 3
MAINTENANCE
CUT
MAINTENANCE
▲↓↑▼
SLOPE
MAINTENANCE
SET 4. TEST RLY
● ○ ○
SET 4
MAINTENANCE
OFF
MAINTENANCE
▲↓↑▼
ON
MAINTENANCE
The first item in Maintenance Mode will display.
2-10. SETTING2
Press the key until the SETTING2 screen displays.
Set the address for GD-70D­NT units. Select the number by pressing the ▲ or ▼ key, and then press the SET key to confirm the address.
Set the date/time of the main unit.
GAS TEST
SETTING2
MAINTENANCE
SET
ADDRESS
SET
ADDRESS
P79
DAY TIME
Set the suppression value. Select the number by pressing the ▲ or ▼ key, and then press the SET key to confirm the value.
Set the suppression system. Select either CUT or SLOPE, and then press the SET key to confirm the selection. When CUT is selected, the display will jump up to the gas reading as soon as it exceeds the suppression value. When SLOPE is selected, the display will ramp up to the gas reading once it exceeds the suppression value.
Set the contact activation for an alarm test. Select either ON or OFF, and then press the SET key to confirm the selection. When ON is selected, the contact can be activated even during an alarm test.
SET
SUPPRESS
SET
SUP TYPE
SET
TEST RLY
↓ ↑
SUPPRESS
SUP TYPE
SUP TYPE
TEST RLY
TEST RLY
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SET 5.TEST4-20
● ○ ○
SET 5
MAINTENANCE
ON
MAINTENANCE
▲↓↑▼
OFF
MAINTENANCE
SET 6.RLY PTRN
● ○ ○
SET 6
MAINTENANCE
Energized/De-
↑▼
SET 7.ALM TYPE
● ○ ○
SET 7
MAINTENANCE
L-LL
MAINTENANCE
▲↓↑▼
L-H
MAINTENANCE
▲↓↑▼
H-HH
MAINTENANCE
SET 8.ALM PTRN
● ○ ○
SET 8
MAINTENANCE
SET 9.AL LIMIT
● ○ ○
SET 9
MAINTENANCE
Set the external output for an alarm test. Select either ON or OFF, and then press the SET key to confirm the selection. When ON is selected, the output follows the reading even during an alarm test. When OFF is selected, the output is what it was right before entering alarm test mode. * When 4 - 20 mA is selected in SET 15, the 4-20 mA output is generated during an alarm test regardless of this TEST4-20 setting.
Select either energized/de­energized for the contact. (De-energized by default)
TEST4-20
RLY PTRN
SET
SET
TEST4-20
TEST4-20
Energized Contact Setting
P81
Set the alarm type. When the galvanic cell type (OSU) is installed, you can select either L-LL (both alarms decreasing), L-H (alarm 1 decreasing, alarm 2 increasing), or H-HH (both alarms increasing).
This is a setting screen of the gas alarm activation. Do not change the setting when the detector is used in a normal way, because it determines how the detector functions. (Auto-reset setting: "nL" by default)
SET
ALM TYPE
ALM TYPE
ALM TYPE
ALM PTRN
ALM TYPE
This is a setting screen of the alarm value limiter. Do not change the setting when the
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detector is used in a normal way. (ON by default)
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AL LIMIT
SET 10. FLT PTRN
● ○ ○
SET 10
MAINTENANCE
SET 11.AT FLOW
● ○ ○
SET 11
MAINTENANCE
ON
MAINTENANCE
▲↓↑▼
OFF
MAINTENANCE
SET 12. ZERO F
● ○ ○
SET 12
MAINTENANCE
ON
MAINTENANCE
▲↓↑▼
OFF
MAINTENANCE
SET 13.ZERO 24F
(ON by default)
● ○ ○
SET 13
MAINTENANCE
SET 14.S ASSIST
● ○ ○
SET 14
MAINTENANCE
ON
MAINTENANCE
▲↓↑▼
OFF
MAINTENANCE
This is a setting screen of the fault alarm activation. Do not change the setting when the detector is used in a normal way, because it determines how the detector functions. (Auto-reset setting: "nL" by default)
Set the flow rate auto­adjustment. Select either ON or OFF, and then press the SET key to confirm the selection. When ON is selected, the flow rate auto-adjustment is activated.
Set the zero follower when the electrochemical type (ESU), pyrolysis-particle type (SSU), new ceramic type (NCU), or NDIR type (IRU) sensor is installed. Select either ON or OFF, and then press the SET key to confirm the selection. When ON is selected, the zero follower function is activated. * When SSU is installed, you must select ON.
FLT PTRN
AT FLOW
ZERO F
SET
AT FLOW
AT FLOW
SET
ZERO F
ZERO F
This is a supplemental setting screen for the above zero follower function. (A setting to determine whether the first-24-hour zero follower will be performed after the power is turned on.) Do not change the setting when the detector is used in a normal way.
Set the sensitivity correction when the electrochemical type (ESU) is installed.
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Select either ON or OFF, and then press the SET key to confirm the selection. When ON is selected, the sensitivity correction function is activated.
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ZERO 24F
S ASSIST
SET
S ASSIST
S ASSIST
SET 15. MNT OUT
● ○ ○
SET 15
MAINTENANCE
2.5mA
MAINTENANCE
▲↓↑▼
4.0mA
MAINTENANCE
▲↓↑▼
HOLD
MAINTENANCE
▲↓↑▼
4-20mA
MAINTENANCE
SET 16.MA 4-20
● ○ ○
SET 16
MAINTENANCE
100%
MAINTENANCE
100%
MAINTENANCE
SET 17.BK LIGHT
● ○ ○
SET 17
MAINTENANCE
ON
MAINTENANCE
▲↓↑▼
SAVE
MAINTENANCE
SET 18. ETHERNET
● ○ ○
SET 18
MAINTENANCE
Set the external output for Maintenance Mode. Select either 2.5 mA, 4.0 mA, HOLD (previous value), or 4 - 20 mA (tracks display value), and then press the SET key to confirm the selection.
MNT OUT
SET
MNT OUT
MNT OUT
↓ ↑
MNT OUT
MNT OUT
Adjust the external output (4 ­20 mA). Adjust the output (%) by pressing the ▲ or ▼ key, and then press the SET key to confirm the value. (It must be adjusted to the upper unit or the ammeter.) After adjustment of 4 mA is completed, perform the adjustment of 20 mA. (Press the MODE key to exit menu after entering.)
Set the backlight. Select either ON or SAVE, and then press the SET key to confirm the selection. When ON is selected, the backlight is on continuously. When SAVE is selected, the backlight is normally off, but turns on during an operation or event.
SET
MA 4-20
4MA ADJ
20MA ADJ
SET
BK LIGHT
BK LIGHT
BK LIGHT
This is a setting screen of the ETHERNET setting. This is not used for the detector.
ETHERNET
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SET 19.PUMP CK
pressure, etc.)
● ○ ○
SET 19
MAINTENANCE
ON
MAINTENANCE
▲↓↑▼
OFF
MAINTENANCE
To
SET 0. ADDRESS
PW
A1
A2
F
LCD
From Detection Mode, press and hold
● ○ ○
0.0ppm
1-8.M MODE
item 1-9.)
● ○ ○
1- 8
User Mode
● ○ ○
1- 8
MAINTENANCE
Then press and hold the SET key again
● ○ ○
- - - -
MAINTENANCE
2-0.GAS TEST
● ○ ○
2- 0
MAINTENANCE
2-10. SETTING2
Press the SET key.
● ○ ○
2- 10
Set the pump drive level diagnosis. Select either ON or OFF, and then press the SET key to confirm the selection. When ON is selected, the message "FLOW" is displayed if the flow rate is sufficient even though the pump drive level is low. (A function to check the conditions for applying
PUMP CK

9-5 Date/Time Setting "2-10" - "SET 1"

Date/Time Setting

the MODE key for three seconds.
SET
PUMP CK
PUMP CK
Press the key until the Maintenance Mode screen displays. (For GD-70D-EA units, the Maintenance Mode screen is
In "1-8.M MODE", press the SET key.
for three seconds.
SIH4
M MODE
MAINTENANCE
M MODE
M MODE
The first item in Maintenance Mode will display.
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Press the key until the SETTING2 screen displays.
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GAS TEST
SETTING2
MAINTENANCE
SET 1.DAY TIME
● ○ ○
SET 1
MAINTENANCE
Date/Time Setting Display
● ○ ○
12:00
MAINTENANCE
Year Setting
● ○ ○
12:00
MAINTENANCE
Month Setting
● ○ ○
12:00
MAINTENANCE
Date Setting
● ○ ○
12:00
MAINTENANCE
Hour Setting
● ○ ○
12:00
MAINTENANCE
Minute Setting
● ○ ○
12:00
MAINTENANCE
Return to
SET 1.DAY TIME
Press the SET key.
DAY TIME
Press the SET key.
2009.01.01
Select the number by pressing the ▲ or key, and then press the SET key to confirm the value.
2009.01.01
Select the number by pressing the ▲ or key, and then press the SET key to confirm the value.
Select the number by pressing the ▲ or key, and then press the SET key to confirm the value.
Select the number by pressing the ▲ or key, and then press the SET key to confirm the value.
Select the number by pressing the ▲ or key, and then press the SET key to confirm the value.
2009.01.01
2009.01.01
2009.01.01
2009.01.01
* In the Date/Time Setting mode, press the MODE key to cancel the changes and go back to the previous setting.
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PW
A1
A2
F
LCD
From Detection Mode, press
● ○ ○
0.0ppm
1-8.M MODE
Mode screen is item 1-9.)
● ○ ○
1- 8
User Mode
● ○ ○
1- 8
MAINTENANCE
Then press and hold the
● ○ ○
- - - -
MAINTENANCE
2-0.GAS TEST
● ○ ○
2- 0
MAINTENANCE
2-10. SETTING2
Press the SET key.
● ○ ○
2- 10
SET 6. RLY PTRN
● ○ ○
SET 6
MAINTENANCE
SET 6. RLY PTRN
● ○ ○
SET 6
MAINTENANCE
9-6 Energized/De-Energized Contact Setting "2-10" ­"SET 6"
and hold the MODE key for three seconds.
SIH4
Press the key until the Maintenance Mode screen displays. (For GD-70D-EA units, the Maintenance
In "1-8.M MODE", press the SET key.
M MODE
MAINTENANCE
M MODE
SET key again for three seconds.
The first item in Maintenance Mode will display.
Press the key until the SETTING2 screen displays.
Press the key until the RLY PTRN screen displays.
M MODE
GAS TEST
SETTING2
MAINTENANCE
RLY PTRN
Press the SET key.
RLY PTRN
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First Alarm Contact
Factory setting is nd.
● ○ ○
nd
MAINTENANCE
nE
MAINTENANCE
Second Alarm Contact
Factory setting is nd.
● ○ ○
nd
MAINTENANCE
nE
MAINTENANCE
Fault Alarm Contact
Factory setting is nd.
● ○ ○
nd
MAINTENANCE
nE
MAINTENANCE
Return to
PTRN
Setting
Select either nd(De­Energized)/nE(Energized), and then press the SET key to confirm the selection. (Press the MODE key to skip this menu.)
Setting
Select either nd (De­Energized)/nE (Energized), and then press the SET key to confirm the selection. (Press the MODE key to skip this menu.)
Setting
Select either nd (De­Energized)/nE (Energized), and then press the SET key to confirm the selection. (Press the MODE key to skip this menu.)
AL1 RLY
AL2 RLY
FLT RLY
/
AL1 RLY
/
AL2 RLY
/
FLT RLY

NOTE

When De-energized (nd) is selected, the relay is energized and activated during an alarm condition (de­energized during normal operation).
When the alarm contacts are configured as normally open, the contacts are open during normal operation and closed during an alarm condition.
When the alarm contacts are configured as normally closed, the contacts are closed during normal operation and open during an alarm condition.
When Energized (nE) is selected, the relay is energized during normal operation (de-energized during an alarm condition).
When the alarm contacts are configured as normally open, the contacts are closed during normal operation and open during an alarm condition. They close if the power is turned OFF.
When the alarm contacts are configured as normally closed, the contacts are open during normal operation and closed during an alarm condition.
SET 6. RLY
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PW
A1
A2 F LCD
From Detection Mode, press
● ○ ○
0.0ppm
1-8.M MODE
Mode screen is item 1-9.)
● ○ ○
1- 8
User Mode
● ○ ○
1- 8
MAINTENANCE
Then press and hold the
● ○ ○
- - - -
MAINTENANCE
2-0.GAS TEST
● ○ ○
2- 0
MAINTENANCE
2-10. SETTING2
Press the SET key.
● ○ ○
2- 10
SET 18. RLY PTRN
● ○ ○
SET 18
MAINTENANCE
SET 18. ETHERNET
● ○ ○
SET 18
MAINTENANCE

9-7 ETHERNET Setting "2-10" - "SET 18"

<ETHERNET Setting>
and hold the MODE key for three seconds.
SIH4
Press the key until the Maintenance Mode screen displays. (For GD-70D-EA units, the Maintenance
In "1-8.M MODE", press the SET key.
M MODE
MAINTENANCE
M MODE
SET key again for three seconds.
The first item in Maintenance Mode will display.
Press the key until the SETTING2 screen displays.
Press the key until the ETHERNET screen displays.
M MODE
GAS TEST
SETTING2
MAINTENANCE
ETHERNET
Press SET key.
ETHERNET
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MAC Address Check
the unit.
● ○ ○
00
MAINTENANCE
(MAC2 -
IP Address Setting
by one in the same way.
● ○ ○
0
MAINTENANCE
255
MAINTENANCE
(IP2 - IP4)
Subnet Mask Setting
way.
● ○ ○
0
MAINTENANCE
255
MAINTENANCE
(SUB2 -
Default Gateway Setting
same way.
● ○ ○
0
MAINTENANCE
255
MAINTENANCE
(DEF2 - DEF4)
There are MAC addresses from MAC1 to MAC6. Select one using and ▼ keys and display them one by one in the same way. * MAC addresses are fixed values unique to
Change the value by pressing the or key, and then press the SET key to confirm the value.
There are IP addresses from IP1 to IP4. Select one using and keys and set them one
Change the value by pressing the or key, and then press the SET key to confirm the value.
There are subnet masks from SUB1 to SUB4. Select one using and keys and set them one by one in the same
Change the value by pressing the or key, and then press the SET key to confirm the value.
There are default gateways from DEF1 to DEF4. Select one using and keys and set them one by one in the
MAC 1
↓↑
MAC6)
↓↑
IP 1
↓↑
↓↑
SUB 1
↓↑
SUB4)
↓↑
DEF 1
↓↑
↓↑
SET
IP 1
SET
SUB 1
SET
DEF 1
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DHCP Setting
are disabled.
● ○ ○
OFF
MAINTENANCE
OFF
MAINTENANCE
▲↓↑▼
ON
PLC Mode Setting
value.
● ○ ○
1
5
PLC Area Setting
value.
● ○ ○
0
15
Setting Result Record
key.
● ○ ○
MAC Address
Press the SET key to
***
Select either ON/OFF, and then press the SET key to confirm the selection. When ON is selected, an IP address is automatically obtained from the DHCP server. In this case, the IP1 to IP4, SUB1 to SUB4, and DEF1 to DEF4 settings
Change the value by pressing the or key, and then press the SET key to confirm the
Change the value by pressing the or key, and then press the SET key to confirm the
DHCP
|↑
||
↓|
PLC MODE
MAINTENANCE
↓↑
PLC AREA
MAINTENANCE
SET
DHCP
DHCP
MAINTENANCE
SET
PLC MODE
MAINTENANCE
SET
PLC AREA
MAINTENANCE
↓↑
To record the results of the settings made in the above, press the SET
MAINTENANCE
Check ***
* In ETHERNET mode, it is necessary to record setting results after all the settings have been selected. Press the MODE key before completion to undo all the changes that have been made.
NOTE
It takes 10 seconds or more for the address settings to be recorded and for the settings to take effect on the system. (Particularly for DHCP, the time it takes depends on the environment.) While the settings are putting into effect, "0" is displayed for all of MAC1 - 6, IP1 - 4, SUB1 - 4 and DEF1 - 4, and none of the Ethernet functions is available.
SAVE
↓↑
SET
SPAN Y/N
MAINTENANCE
record the setting results and return to SET 18. ETHERNET
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Task
Description
Daily
Monthly
Biannually
Power supply check
Verify that the power lamp lights up.
Concentration
Verify that the gas reading is zero (or
adjustment.
Flow rate check
See the flow rate indicator to check for abnormalities.
Filter check
Check the dust filter for dust or clogging.
Alarm test
Inspect the alarm circuit by using the alarm test function.
Span
Perform a span adjustment using
Gas alarm check
Check alarm operation using calibration gas.
Detection Gas
Range
Calibration Instructions
10

Maintenance

This is a critical instrument for incident prevention and safety. To maintain the performance of the detector and improve its reliability, perform regular maintenance.

NOTE

To use the pyrolyzer unit (PLU-70), also refer to the individual operating manual.

10-1 Maintenance intervals and items

Daily maintenance: perform maintenance before beginning to work.
Monthly maintenance: perform maintenance on the alarm circuit (alarm test) once a month.
Regular maintenance: perform maintenance once every six months.
display check
adjustment
20.9 vol% for oxygen). If the reading is not zero (or 20.9 vol%), perform a zero
calibration gas.

10-2 Calibration Overview

Calibration instructions depend on the GD-70D you are calibrating. The table below will tell you what calibration instructions to use based on your GD-70D’s detection gas and range.
AsH3 (Arsine) 0 - 0.20 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
B2H6 (Diborane) 0 - 0.30 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
BCl3 (Boron trichloride) 0 - 15.0 ppm Calibrating with a Gas Bag (Calibrating with HCl) on page 99
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Detection Gas
Range
Calibration Instructions
C2H4 (Ethylene)
0 - 2,000 ppm
Calibrating with a Humidifier (MOS Sensors) on page 103
Br2 (Bromine) 0 - 1.00 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
BTBAS (Bis[tertiary-butyl-
amino]silane)
C2H2 (Acetylene) 0 - 2,000 ppm Calibrating with a Humidifier (MOS Sensors) on page 103
C2H2Cl2 (Dichloroethene) 0 - 600 ppm Calibrating with a Humidifier (MOS Sensors) on page 103
C2H5OH (Ethanol) 0 - 2,000 ppm Calibrating with a Humidifier (MOS Sensors) on page 103
C3H6 (Propylene) 0 - 5,000 ppm Calibrating with a Humidifier (MOS Sensors) on page 103
C3H8 (Propane) 0 - 2,000 ppm Calibrating with a Humidifier (MOS Sensors) on page 103
C4F6 (Hexafluorabutadiene) 0 - 200 ppm Calibrating with a Humidifier (MOS Sensors) on page 103
C4H10 (Isobutane) 0 - 100 %LEL Calibrating with a Demand Flow Regulator on page 90
C6H14 (Hexane) 0 - 2,000 ppm Calibrating with on page 90
CH2Cl2 (Dichloromethane) 0 - 2,000 ppm Calibrating with a Humidifier (MOS Sensors) on page 103
CH3CN (Acetonitrile) 0 - 2,000 ppm Calibrating with a Humidifier (MOS Sensors) on page 103
CH3COOH (Acetic acid) 0 - 30.0 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
0 - 15.0 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
0 - 5,000 ppm
0 - 100% LEL Calibrating with on page 90
page 93
CH3NH2 (Methylamine) 0 - 15.0 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
CH3OH (Methanol) 0 - 1,000 ppm Calibrating with a Humidifier (MOS Sensors) on page 103
0 - 2,000 ppm
CH4 (Methane) 0 - 100 %LEL Calibrating with a Demand Flow Regulator on page 90
0 - 2% vol Calibrating with a Humidifier (MOS Sensors) on page 103
0 - 2000 ppm
0 - 5000 ppm
CH6Si (Methyl silane) 0 - 20.0 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
Cl2 (Chlorine) 0 - 3.00 ppm Calibrating with a Demand Flow Regulator on page 90
ClF3 (Chlorine trifluoride) 0 - 0.60 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
CO (Carbon monoxide) 0 - 75.0 ppm Calibrating with a Demand Flow Regulator on page 90
0 - 150 ppm
0 - 300 ppm
COS (Carbonyl sulfide) 0 - 2,000 ppm Calibrating with a Humidifier (MOS Sensors) on page 103
0 - 90.0 ppm Calibrating a Pyrolyzer Unit on page 107
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Detection Gas
Range
Calibration Instructions
COF2 (Cobalt difluorine) 0 - 6.00 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
DEA (Diethylamine) 0 - 15.0 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
DMA (Dimethylamine) 0 - 15.0 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
DME (Dimethyl ether) 0 - 100% LEL Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
F2 (Fluorine) 0 - 3.00 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
GeH4 (Germane) 0 - 0.80 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
H2 (Hydrogen)
H2Cl2Si (Dichlorosilane) 0 - 15.0 ppm Calibrating with a Gas Bag (Calibrating with HCl) on page 99
H2O2 (Hydrogen peroxide) 0 - 3.00 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
H2S (Hydrogen sulfide) 0 - 1.00 ppm Calibrating with a Demand Flow Regulator on page 90
H2Se (Hydrogen selenide) 0 - 0.20 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
H9NSi3 (Trisilylamine) 0 - 15.0 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
HBR (Hydrogen bromide) 0 - 6.00 ppm Calibrating with a Gas Bag (Calibrating with HCl) on page 99
0 - 100 %LEL Calibrating with a Demand Flow Regulator on page 90
0 - 2.00 %volume Calibrating with a Humidifier (MOS Sensors) on page 103
0 - 500 ppm
0 - 1,000 ppm
0 - 2,000 ppm
0 - 4,000 ppm
page 93
0 - 30.0 ppm
page 93
page 93
0 - 9.00 ppm
HCl (Hydrogen chloride) 0 - 6.00 ppm Calibrating with a Gas Bag (Calibrating with HCl) on page 99
0 - 15.0 ppm
HCN (Hydrogen cyanide) 0.9 - 15.0 ppm Calibrating with a Demand Flow Regulator on page 90
HCOOH (Formic acid) 0 - 15.0 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
HF (Hydrogen fluoride) 0.4 - 3.00 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
0.4 - 9.00 ppm
HNO3 (Nitric acid) 0 - 20.0 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
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page 93
page 93
Detection Gas
Range
Calibration Instructions
IPA (Isopropyl alcohol) 0 - 2,000 ppm Calibrating with a Humidifier (MOS Sensors) on page 103
0 - 100 %LEL Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
N2O (Nitrous oxide) 0 - 500 ppm Calibrating with a Demand Flow Regulator on page 90
N2H4 (Hydrazine) 0 - 5.00 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
page 93
NF3 (Nitrogen trifluoride) 0 - 30.0 ppm Calibrating a Pyrolyzer Unit on page 107
NH3 (Ammonia) 0 - 75.0 ppm Calibrating with a Demand Flow Regulator on page 90
NO (Nitric oxide) 0 - 100 ppm Calibrating with a Demand Flow Regulator on page 90
NO2 (Nitrogen dioxide) 0 - 9.00 ppm Calibrating with a Demand Flow Regulator on page 90
0 - 15.0 ppm
O2 (Oxygen) 0 - 5.00% Calibrating with a Demand Flow Regulator on page 90
0 - 25.0% Calibrating with a Demand Flow Regulator on page 90
O3 (Ozone) 0 - 0.60 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
0 - 1.00 ppm
PH3 (Phosphine) 0 - 1.00 ppm Calibrating with a Demand Flow Regulator on page 90
R32 (Difluoromethane) 0 - 2,000 ppm Calibrating with a Humidifier (MOS Sensors) on page 103
0 - 5,000 ppm
0 - 9,000 ppm
R41 (Fluoromethane) 0 - 2,000 ppm Calibrating with a Humidifier (MOS Sensors) on page 103
R152A (Difluoroethane) 0 - 5,000 ppm Calibrating with a Humidifier (MOS Sensors) on page 103
TEOS (Tetraethyl orthosilicate) 0 - 15.0 ppm Calibrating a Pyrolyzer Unit on page 107
TMA (Trimethylamine) 0 - 15.0 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
TMB (Trimethoxy borane) 0 - 1000 ppm Calibrating a Pyrolyzer Unit on page 107
TMS (Tetramethyl silane) 0 - 15.0 ppm Calibrating a Pyrolyzer Unit on page 107
TRIMS (Trimethyl silane) 0 - 15.0 ppm Calibrating a Pyrolyzer Unit on page 107
Si2H6 (Disilane) 0 - 15.0 ppm Calibrating with a Surrogate Gas (Sensors with Factors) on
SiCl4 (Silicon tetrachloride) 0 - 15.0 ppm Calibrating with a Gas Bag (Calibrating with HCl) on page 99
page 93
page 93
page 93
SiH4 (Silane) 0 - 15.0 ppm Calibrating with a Demand Flow Regulator on page 90
SO2 (Sulphur dioxide) 0 - 6.00 ppm Calibrating with a Demand Flow Regulator on page 90
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Detection Gas
Range
Calibration Gas/Concentration
Warm Up Time After Power-Up

10-3 Calibrating with the Target Gas

The calibration instructions in this section apply ONLY to the sensors listed in the table below. If your sensor is not listed in the table below, you will need to follow the instructions outlined in one of the other calibration sections. The warm up times listed are the minimum times between powering up a GD-70D and calibrating that GD-70D.
C3H8 (Propane) 0 - 100 %LEL Propane: 50% LEL 2 hours
C4H10 (Isobutane) 0 - 100 %LEL Isobutane: 50% LEL 2 hours
C6H14 (Hexane) 0 - 100 %LEL Hexane: 50% LEL 2 hours
CH4 (Methane) 0 - 100 %LEL Methane: 50% LEL 2 hours
Cl2 (Chlorine) 0 - 3.00 ppm Chlorine: 2 ppm 3 hours
CO (Carbon monoxide) 0 - 75.0 ppm Carbon monoxide: 50 ppm 3 hours
0 - 150 ppm Carbon monoxide: 100 ppm 3 hours
0 - 300 ppm Carbon monoxide: 200 ppm 3 hours
H2 (Hydrogen)
H2S (Hydrogen sulfide) 0 - 1.00 ppm Hydrogen sulfide (H2S): 1 ppm 3 hours
HCN (Hydrogen cyanide) 0.9 - 15.0 ppm Hydrogen cyanide (HCN): 10 ppm 3 hours
N2O (Nitrous oxide) 0 - 500 ppm Nitrous oxide (NO): 250 ppm 1 hour
NH3 (Ammonia) 0 - 75.0 ppm Ammonia (NH3): 50 ppm 3 hours
NO (Nitric oxide) 0 - 100 ppm Nitric oxide (NO): 25 ppm 3 hours
NO2 (Nitrogen dioxide) 0 - 9.00 ppm Nitrogen dioxide (NO2): 5 ppm 6 hours
O2 (Oxygen) 0 - 5.00% Oxygen (O2): 2% for span
PH3 (Phosphine) 0 - 1.00 ppm Phosphine (PH3): 0.5 ppm 6 hours
SiH4 (Silane) 0 - 15.0 ppm Silane (SiH4): 5 ppm 6 hours
SO2 (Sulphur dioxide) 0 - 6.00 ppm Sulphur dioxide (SO2): 5 ppm 3 hours
0 - 100 %LEL Hydrogen (H2): 50% LEL 2 hours
0 - 30.0 ppm Hydrogen sulfide (H2S): 15 ppm 3 hours
0 - 15.0 ppm Nitrogen dioxide (NO2): 10 ppm 6 hours
10 minutes
Nitrogen (N2): 100% for zero
0 - 25.0% Fresh air for span
Nitrogen (N2): 100% for zero
3 hours

Calibration Equipment

Demand flow regulator (RKI Instruments, Inc. recommends that you dedicate one regulator each
for Cl2 and H2S and that you not use that regulator for any other gas)
Calibration tubing
Calibration cylinder of appropriate concentration

Preparing for Calibration

GAS IN Fitting Remove the dust filter and the sample line from the GAS IN fitting’s tubing stub.
Regulator Screw the demand flow regulator onto the calibration cylinder.
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Accessing Maintenance Mode
0.0ppm
1- 8
MAINTENANCE
User Mode
1- 8
MAINTENANCE
Then press and hold the SET key again for three seconds.
- - - -
MAINTENANCE
2-0.GAS TEST
2- 0
MAINTENANCE
2-1. ZERO
Press the SET key.
2- 1
Current Concentration Value Display
1.1ppm
MAINTENANCE
Zero Adjustment Completed
0.0ppm
MAINTENANCE
0.0ppm
MAINTENANCE
Return to 2-1.ZERO
Return to 2-1.ZERO
From Detection Mode, press and hold the MODE key for three seconds.
1-8.M MODE Press the key until the Maintenance Mode screen displays. (For GD-
70D-EA units, the Maintenance Mode screen is item 1-9.)
In "1-8.M MODE", press the SET key.
SIH4
M MODE
M MODE
The first item in Maintenance Mode will display.

Performing a Zero Adjustment

Press the key until the ZERO screen displays.
Press the SET key to perform the zero adjustment.
M MODE
GAS TEST
ZERO
MAINTENANCE
ZERO SET
The instrument will indicate whether the zero adjustment passed (OK) or failed (NG) and will return to 2-1.ZERO automatically.
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ZERO OK
OR
ZERO NG
Do not press the SET key before the reading is stabilized.
2-2. SPAN
Press the SET key.
2- 2
Allow gas to flow for 2 minutes.
Accept Reading
scale value in order to continue.
2.0ppm
Disconnect Gas
tubing stub on the GAS IN fitting.
Span Adjustment
Press the SET key.
8.0ppm
MAINTENANCE
Span Adjustment Completed
8.0ppm
MAINTENANCE
8.0ppm
MAINTENANCE
↓ ↓
Return to 2-2.SPAN
Save Adjustment
8.0ppm
MAINTENANCE
Adjustment Completed
8.0ppm
MAINTENANCE

Performing a Span Adjustment

Press the key until the SPAN screen displays.
Connect Gas Use the calibration tubing to connect the demand flow regulator to the tubing stub on the GAS IN fitting. Gas will begin to flow.
Press the SET key when the reading has stabilized. * The reading must be above 10% of the full

CAUTION

SPAN
MAINTENANCE
SPAN GAS
MAINTENANCE
Disconnect the calibration tubing from the
Using the or keys, adjust the reading to match the concentration listed on your calibration cylinder.
The instrument will indicate whether the span adjustment passed (OK) or failed (NG).
To save the adjustment result, press the SET key. (Press the MODE key to cancel this menu.)
SPAN VAL
SPAN OK
SPAN Y/N
OR
SPAN NG
After the span has been recorded, the instrument will return to 2-2.SPAN automatically.
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SPAN END
Return to 2-2.SPAN
Detection Gas
Range
Calibration Gas/Concentration
Warm Up Time After Power-Up
through the exhaust line.

CAUTION

Exhaust gas must be collected in the exhaust bag or discharged

Returning to Detection Mode

Store the components of the calibration kit in a safe place.
Reconnect the dust filter and inlet line to the GAS IN fitting.
Press and hold the MODE key to return to Detection Mode.

10-4 Calibrating with a Surrogate Gas (Sensors with Factors)

The calibration instructions in this section apply ONLY to the sensors listed in the table below. If your sensor is not listed in the table below, you will need to follow the instructions outlined in one of the other calibration sections. The warm up times listed are the minimum times between powering up a GD-70D and calibrating that GD-70D.
AsH3 (Arsine) 0 - 0.20 ppm Phosphine (PH3): 0.5 ppm** 24 hours
B2H6 (Diborane) 0 - 0.30 ppm Phosphine (PH3): 0.5 ppm** 24 hours
Br2 (Bromine) 0 - 1.00 ppm Chlorine (Cl2): 2 ppm** 3 hours
BTBAS (Bis[tertiary-butyl-
amino]silane)
CH3COOH (Acetic acid) 0 - 30.0 ppm Chlorine (Cl2): 2 ppm** 3 hours
CH3NH2 (Methylamine) 0 - 15.0 ppm Ammonia (NH3): 5 ppm** 6 hours
CH6Si (Methylsilane) 0 - 20.0 ppm Silane (SiH4): 5 ppm* 3 hours
ClF3 (Chlorine trifluoride) 0 - 0.60 ppm Chlorine (Cl2): 2 ppm* 3 hours
COF2 (Cobalt difluorine) 0 - 6.00 ppm Chlorine (Cl2): 2 ppm** 3 hours
DEA (Diethylamine) 0 - 15.0 ppm Ammonia (NH3): 5 ppm** 24 hours
DMA (Dimethylamine) 0 - 15.0 ppm Ammonia (NH3): 5 ppm** 6 hours
DME (Dimethyl ether) 0 - 100% LEL Isobutane (C4H10): 50% LEL*
F2 (Fluorine) 0 - 3.00 ppm Chlorine (Cl2): 2 ppm or 5 ppm*** 3 hours
GeH4 (Germane) 0 - 0.80 ppm Silane (SiH4): 5 ppm** 3 hours
0 - 15.0 ppm Ammonia (NH3): 5 ppm* 6 hours
2 hours
(SET GD-70D TO 28% LEL)
H2O2 (Hydrogen peroxide) 0 - 3.00 ppm Phosphine (PH3): 0.5 ppm * 3 hours
H2Se (Hydrogen selenide) 0 - 0.20 ppm Phosphine (PH3): 0.5 ppm** 24 hours
H9NSi3 (Trisilylamine) 0 - 15.0 ppm Silane (SiH4): 30 ppm* 3 hours
HCOOH (Formic acid) 0 - 15.0 ppm Chlorine (Cl2): 2 ppm* 3 hours
HF (Hydrogen fluoride) 0.4 - 9.00 ppm Chlorine (Cl2): 2 ppm or 5 ppm*** 3 hours
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Detection Gas
Range
Calibration Gas/Concentration
Warm Up Time After Power-Up
* No dilution needed.
factor should be as close to 50% of full scale as possible.
HNO3 (Nitric acid) 0 - 20.0 ppm Chlorine (Cl2): 2 ppm or 5 ppm*** 3 hours
IPA (Isopropyl alcohol) 0 - 100 %LEL Isobutane (C4H10): 50% LEL*
(SET GD-70D TO 60% LEL)
N2H4 (Hydrazine) 0 - 5.00 ppm Nitrous oxide (NO): 10 ppm* 6 hours
O3 (Ozone) 0 - 0.60 ppm Chlorine (Cl2): 2 ppm** 3 hours
0 - 1.00 ppm Chlorine (Cl2): 2 ppm** 3 hours
Si2H6 (Disilane) 0 - 15.0 ppm Silane (SiH4): 5 ppm or 30 ppm*** 3 hours
TMA (Trimethylamine) 0 - 15.0 ppm Ammonia (NH3): 5 ppm** 6 hours
** Gas may or may not need dilution depending on the sensor’s factor. The calibration gas multiplied by the factor should be as close to 50% of full scale as possible. *** Use one of the two gases listed, depending on sensor’s factor. The calibration gas multiplied by the
2 hours

Discussion for **

Gases with a ** next to them in the table above may or may not need to be diluted before being used to calibrate the GD-70D. In order to figure out if you need to dilute the gas, multiply the gas concentration listed on your calibration cylinder by the factor listed on the sensor unit at the GD-70D. The result should be something between 10% and 100% of full scale for the sensor. A value closest to 50% of full scale is ideal but if you can get somewhere between 10% and 100% of full scale without diluting, that is also fine.

Discussion for ***

For gases with a *** next to them in the table above, different concentrations of calibration gas need to be used depending on the factor listed on the sensor unit. The goal is to have the calibration gas multiplied by the factor be as close to 50% of full scale as possible. It is not necessary to dilute these gases to achieve that goal. The concentration listed on the calibration cylinder multiplied by the factor listed on the sensor should be as close to 50% of full scale as possible but any value between 10% and 100% of full scale can be used to calibrate.

Calibration Equipment for Gases Needing Dilution

0.5 LPM fixed flow regulator (RKI Instruments, Inc. recommends that you dedicate one regulator for Cl2 and that you not use that regulator for any other gas)
Tedlar gas collection bag with hose and hose clamp
Calibration cylinder
100% nitrogen (N2) cylinder
Stopwatch or other timing device

Calibration Equipment for Gases Not Needing Dilution

Demand flow regulator
Calibration tubing
Calibration cylinder of appropriate concentration

Preparing for Calibration – Gases Needing Dilution

Determining Needed Calibration Gas Concentration Before performing a calibration, you must mix your calibration gas in a gas bag. You need to first determine what final concentration of calibration gas you need.
   
     (1      2)
The final concentration multiplied by the sensor’s factor must be between 10% and 100% of full scale. Ideally, the final concentration multiplied by the sensor’s factor should be as close to 50% of full scale as possible, but anything between 10% and 100% of full scale is acceptable. For example, a gas bag full of
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×   <   
Total Parts in Gas Bag
(from discussion in previous section)
Gas Flow Time
Nitrogen Flow Time
2 (1 part gas, 1 part N2)
1 minute
1 minute
3 (1 part gas, 2 parts N2)
1 minute
2 minutes
4 (1 part gas, 3 parts N2)
45 seconds
2 minutes 15 seconds
5 (1 part gas, 4 parts N2)
30 seconds
2 minutes
6 (1 part gas, 5 parts N2)
20 seconds
1 minute 40 seconds
7 (1 part gas, 6 parts N2)
20 seconds
2 minutes
8 (1 part gas, 7 parts N2)
15 seconds
1 minute 45 seconds
9 (1 part gas, 8 parts N2)
15 seconds
2 minutes
10 (1 part gas, 9 parts N2)
12 seconds
1 minute 48 seconds
0.1 ppm PH3 multiplied by a factor of 1.7 is 0.17 ppm which is below the full scale value of 0.20 ppm for AsH3 or H2Se.
Phosphine does not come in cylinders of 0.1 ppm concentration so you need to determine how much to dilute the cylinder that you have. For example, a cylinder of 0.5 ppm PH3 diluted 1 part gas to 4 parts nitrogen (5 parts total) would give you 0.1 ppm PH3:
0.5  3
5
But if you had a higher concentration of PH3 in your calibration cylinder or if your sensor’s factor is higher than 1.7, you would need to increase the dilution.
1.0  3
5
Changing the dilution to 1 part gas to 8 parts nitrogen (9 parts total):
1.0  3
9
Determining How to Fill Gas Bag After determining the required dilution, you will need to determine how to fill your gas bag (ie. how long to let each cylinder flow). The GD-70D will need approximately 1 liter of gas for a 2 minute calibration. The fixed flow regulator used to fill the gas bag flows at 0.5 LPM.
The table below provides suggestions for gas flow times based on level of dilution needed. The times listed assume you have a 2 liter gas bag and will provide between 1 and 1.5 liters of gas which is enough to calibrate one detector head. If you want to mix a gas once and calibrate multiple detector heads with it, you will need a bag larger than 2 liters and you will need to increase the times listed below.
× 1.7 = 0.17   < 0.20 
× 1.7 = 0.34    < 0.20 
× 1.7 = 0.19   < 0.20 
Filling the Gas Bag
1. If not already installed, install the hose and hose clamp on the gas bag.
2. Open the hose clamp on the gas bag.
3. Be sure the gas bag is completely empty.
4. Connect the tubing on the gas bag to the fixed flow regulator’s hose barb fitting.
5. For toxic gas cylinders, like Cl2, it is important to vent the regulator while installing it onto the cylinder. Venting the regulator during installation helps prevent air from getting into the cylinder and degrading the gas. Open the regulator by turning the knob counterclockwise and install it onto the cylinder.
6. Allow the gas to flow for the appropriate amount of time based on your dilution needs. See Table 1 above.
7. Turn the regulator’s knob clockwise to close it.
8. Clamp down on the hose clamp to prevent the release of gas from the gas bag.
9. Remove the gas bag from the regulator.
10. Unscrew the regulator from the calibration cylinder and screw it onto a 100% N2 cylinder.
11. Connect the gas bag tubing to the regulator’s hose barb fitting.
12. Open the hose clamp on the gas bag.
13. Turn the regulator’s knob counterclockwise. Allow the gas to flow for the appropriate amount of time based on your dilution needs. See Table 1 above.
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Accessing Maintenance Mode
0.0ppm
1- 8
MAINTENANCE
User Mode
1- 8
MAINTENANCE
Then press and hold the SET key again for three seconds.
- - - -
MAINTENANCE
2-0.GAS TEST
2- 0
MAINTENANCE
2-1. ZERO
Press the SET key.
2- 1
14. Turn the regulator’s knob clockwise to close it.
15. Clamp down on the hose clamp to prevent the release of gas from the gas bag.
16. Remove the gas bag from the regulator.
17. Unscrew the regulator from the 100% N2 cylinder.
18. Continue to Entering Calibration Mode below.

Preparing for Calibration – Gases Not Needing Dilution

Regulator Screw the demand flow regulator onto the calibration cylinder.

Entering Calibration Mode

GAS IN Fitting Remove the dust filter and the sample line from the GAS IN fitting’s tubing stub.
From Detection Mode, press and hold the MODE key for three seconds.
SIH4
1-8.M MODE Press the key until the Maintenance Mode screen displays. (For GD-
70D-EA units, the Maintenance Mode screen is item 1-9.)
M MODE
In "1-8.M MODE", press the SET key.
The first item in Maintenance Mode will display.

Performing a Zero Adjustment

Press the key until the ZERO screen displays.
M MODE
M MODE
GAS TEST
ZERO
MAINTENANCE
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Do not press the SET key before the reading is stabilized.
Current Concentration Value Display
1.1ppm
MAINTENANCE
Zero Adjustment Completed
0.0ppm
MAINTENANCE
0.0ppm
MAINTENANCE
Return to 2-1.ZERO
Return to 2-1.ZERO
Press the SET key.
2- 2
Connect Gas
Allow gas to flow for 2 minutes.
Accept Reading
scale value in order to continue.
2.0ppm
Disconnect Gas
tubing stub on the GAS IN fitting.
Press the SET key to perform the zero adjustment.
The instrument will indicate whether the zero adjustment passed (OK) or failed (NG) and will return to 2-1.ZERO automatically.

Performing a Span Adjustment

2-2. SPAN Press the key until the SPAN screen displays.
ZERO SET
ZERO OK
SPAN
MAINTENANCE
OR
ZERO NG
Open the hose clamp on the gas bag and immediately connect the tubing to the tubing stub on the GAS IN fitting OR Use the calibration tubing to connect the demand flow regulator to the tubing stub on the GAS IN fitting.
Press the SET key when the reading has stabilized. * The reading must be above 10% of the full

CAUTION

Close the gas bag’s hose clamp and immediately remove the gas bag from the tubing stub on the GD-70D’s GAS IN fitting. OR Disconnect the calibration tubing from the
SPAN GAS
MAINTENANCE
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Span Adjustment
Press the SET key.
8.0ppm
MAINTENANCE
Span Adjustment Completed
8.0ppm
MAINTENANCE
8.0ppm
MAINTENANCE
↓ ↓
Return to 2-2.SPAN
Save Adjustment
8.0ppm
MAINTENANCE
Adjustment Completed
8.0ppm
MAINTENANCE
Return to 2-2.SPAN
through the exhaust line.
Using the or keys, adjust the reading to match the concentration in the gas bag multiplied by the conversion factor on the sensor OR to the value listed in the table at the beginning of this section.
For example, a gas bag of 0.1 ppm PH3 multiplied by a conversion factor of 1.7 is 0.17 ppm AsH3 or H2Se.
The instrument will indicate whether the span adjustment passed (OK) or failed (NG).
SPAN VAL
SPAN OK
OR
SPAN NG
To save the adjustment result, press the SET key. (Press the MODE key to cancel this menu.)
After the span has been recorded, the instrument will return to 2-2.SPAN automatically.

Returning to Detection Mode

Store the components of the calibration kit in a safe place.
Reconnect the dust filter and inlet line to the GAS IN fitting.
Press and hold the MODE key to return to Detection Mode.

CAUTION

Exhaust gas must be collected in the exhaust bag or discharged
SPAN Y/N
SPAN END
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Detection Gas
Range
Calibration Gas/Concentration
Warm Up Time After Power-Up
* May or may not need dilution. In order to figure out if you need to dilute the gas, multiply the gas
diluting, that is also fine.

10-5 Calibrating with a Gas Bag (Calibrating with HCl)

The calibration instructions in this section apply ONLY to the sensors listed in the table below. If your sensor is not listed in the table below, you will need to follow the instructions outlined in one of the other calibration sections. The warm up times listed are the minimum times between powering up a GD-70D and calibrating that GD-70D.
BCl3 (Boron trichloride) 0 - 15.0 ppm Hydrogen chloride (HCl): 5 ppm 6 hours
H2Cl2Si (Dichlorosilane) 0 - 15.0 ppm Hydrogen chloride (HCl): 5 ppm 6 hours
HBr (Hydrogen bromide) 0 - 6.00 ppm Hydrogen chloride (HCl): 5 ppm* 24 hours
0 - 9.00 ppm Hydrogen chloride (HCl): 5 ppm* 24 hours
HCl (Hydrogen chloride) 0 - 6.00 ppm Hydrogen chloride (HCl): 5 ppm 6 hours
0 - 15.0 ppm Hydrogen chloride (HCl): 5 ppm 6 hours
SiCl4 (Silicon tetrachloride) 0 - 15.0 ppm Hydrogen chloride (HCl): 5 ppm 6 hours
concentration listed on your calibration cylinder by the factor listed on the sensor unit at the GD-70D. The result should be something between 10% and 100% of full scale for the sensor. A value closest to 50% of full scale is ideal but if you can get somewhere between 10% and 100% of full scale without

Calibration Equipment – No Dilution Needed

6 LPM fixed flow regulator (RKI Instruments, Inc. recommends that you dedicate one regulator for use with HCl and that you not use that regulator for any other gas)
Gas bag with tubing and a hose clamp
Calibration cylinder of appropriate concentration

Calibration Equipment – 1:1 Dilution Needed

6 LPM fixed flow regulator (RKI Instruments, Inc. recommends that you dedicate one regulator for: use with HCl and that you not use that regulator for any other gas)
Gas bag with tubing and a hose clamp
Calibration cylinder of appropriate concentration
100% N2 cylinder

Preparing for Calibration – No Dilution Needed

Filling the Gas Bag RKI Instruments, Inc. recommends screwing a nitrogen calibration cylinder onto the fixed flow regulator and purging the regulator for 30 seconds before starting the calibration process.
1. If not already installed, install the hose and hose clamp on the gas bag.
2. Open the hose clamp on the gas bag.
3. Be sure the gas bag is completely empty.
4. Connect the tubing on the gas bag to the fixed flow regulator’s hose barb fitting.
5. For toxic gas cylinders, like HCl, it is important to vent the regulator while installing it onto the cylinder. Venting the regulator during installation helps prevent air from getting into the cylinder and degrading the gas. Open the regulator by turning the knob counterclockwise and install it onto the cylinder.
6. Allow the gas to flow until the gas bag is about half full.
7. Turn the regulator’s knob clockwise to close it.
8. Close the hose clamp.
9. Disconnect the gas bag from the regulator.
10. Unscrew the regulator from the calibration cylinder.
11. Continue to Entering Calibration Mode below.
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GAS IN Fitting
Accessing Maintenance Mode
0.0ppm
1-8.M MODE
1- 8
MAINTENANCE
User Mode
1- 8
MAINTENANCE
Then press and hold the SET key again for three seconds.
- - - -
MAINTENANCE

Preparing for Calibration – 1:1 Dilution Needed

Filling the Gas Bag RKI Instruments, Inc. recommends screwing a nitrogen calibration cylinder onto the fixed flow regulator and purging the regulator for 30 seconds before starting the calibration process.
1. If not already installed, install the hose and hose clamp on the gas bag.
2. Open the hose clamp on the gas bag.
3. Be sure the gas bag is completely empty.
4. Connect the tubing on the gas bag to the 6LPM fixed flow regulator’s hose barb fitting.
5. For toxic gas cylinders, like HCl, it is important to vent the regulator while installing it onto the cylinder. Venting the regulator during installation helps prevent air from getting into the cylinder and degrading the gas. Open the regulator by turning the knob counterclockwise and install it onto the cylinder.
6. Allow the gas to flow for 7 seconds.
7. Turn the regulator’s knob clockwise to close it.
8. Clamp down on the hose clamp to prevent the release of gas from the gas bag.
9. Remove the gas bag from the regulator.
10. Unscrew the regulator from the calibration cylinder and screw it onto a 100% N2 cylinder.
11. Connect the gas bag tubing to the regulator’s hose barb fitting.
12. Open the hose clamp on the gas bag.
13. Turn the regulator’s knob counterclockwise. Allow the gas to flow for 7 seconds.
14. Turn the regulator’s knob clockwise to close it.
15. Clamp down on the hose clamp to prevent the release of gas from the gas bag.
16. Remove the gas bag from the regulator.
17. Unscrew the regulator from the 100% N2 cylinder.
18. The gas concentration in the gas bag is half of what is listed on the HCl calibration cylinder.
19. Continue to Entering Calibration Mode below.

Entering Calibration Mode

Remove the dust filter and the sample line from the GAS IN fitting’s tubing stub.
From Detection Mode, press and hold the MODE key for three seconds.
(For GD-70D-EA units, the Maintenance Mode screen is item 1-9.)
Press the key until the Maintenance Mode screen displays.
In "1-8.M MODE", press the SET key.
SIH4
M MODE
M MODE
M MODE
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