RKI Instruments SD-1OX Operating Manual

Smart transmitter/gas detector head

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Smart Transmitter/Gas Detector Head

SD-1GH

Operating Manual

Part Number: 71-0531

Revision: 0

Released: 1/23/2024

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Summary of Contents for RKI Instruments SD-1OX

Page 1 Smart Transmitter/Gas Detector Head SD-1GH Operating Manual Part Number: 71-0531 Revision: 0 Released: 1/23/2024...
Page 2 Operating Precautions This instrument is a gas detector that detects combustible gases in the air and triggers a gas alarm. The gas detector is a safety unit, not an analyzer or densitometer which performs quantitative/qualitative analysis/measurement for gases. Please fully understand the following points before using it, so that it can be used properly. This detector may be interfered by gases and vapors other than the gas to be detected.
Page 3 <Contents> 1 Outline of the Product ......................4 1-1. Preface ........................4 1-2. Purpose of Use ......................4 1-3. Definition of DANGER, WARNING, CAUTION, and NOTE ........4 1-4. Confirming Standards and Explosion-proof Specification .......... 5 2 Important Notices on Safety ....................6 2-1.
Page 4 Outline of the Product 1-1. Preface Thank you for choosing the SD-1GH. Please check that the model number of the product you purchased is included in this manual’s specifications. This manual explains how to use the detector. It contains information required for using the detector properly.
Page 5 1-4. Confirming Standards and Explosion-proof Specification Some detector specifications depend on the standard and explosion proof certificate. Please confirm the detector specification before using. Please refer to the Declaration of Conformity at the end of this manual if you have CE marking type. You can confirm detector specification on the name plate as follows. Ex marking TIIS certificate CE marking...
Page 6 Important Notices on Safety 2-1. Danger Cases DANGER About explosion-proof • The window plate material is a polycarbonate resin. Do not use organic solvents and alkali types (liquid or vapor) as they may change the color or shape of the window plate. •...
Page 7 2-3. Precautions CAUTION Do not use a transceiver near the detector. Radio waves from a transceiver near the detector or its cables may disturb the reading. If a transceiver is used, it must be used in a place where it does not disturb the reading. Wait for five seconds or more before restarting the detector.
Page 8 2-4. Safety Information Necessary information for explosion proof construction of Model SD-1GH. The Model SD-1GH is a fixed-mount, continuous-monitoring detector head and provides a 4-20mA signal proportional to the target gas reading for use by a gas monitoring controller, recording device, or programmable controller.
Page 9 <TIIS Specifications> Technical Data Protection Method Flameproof enclosure Explosion-proof Class Ex d IIC T5 X Ambient Temperature -20°C to +53°C Electrical Data Supply voltage: DC24V 130 mA Analog signal output: DC24V 25 mA Contact output (contact capacity): AC250V 0.5A (load resistance) DC30V 0.5A (load resistance) Applicable Standard JNIOSH-TR-NO.
Page 10 Product Components 3-1. Main Unit and Standard Accessories <ATEX/IECEx Specification> <TIIS Specification> <Standard Accessories> • Operating manual • Dedicated handling lever (used for the wiring) • Dedicated control key SD-1GH - 10 -...
Page 11 3-2. Parts Description (6) Alarm lamp (7) Fault lamp (5) Power lamp (1) MENU/ESC key (3) ▲ key (8) Concentration value display (4) ▼ key (2) SET key Enter maintenance mode. MENU/ESC key Cancel in a specific mode. SET key Value confirmation.
Page 12 3-3. Electric Diagram Power Supply POWER INPUT (24 VDC) Display (POWER) (ALARM) (FAULT) Seven-segment LED Controller Alarm Contact Controller (four-digit) (CPU) Gas alarm contact (ALARM) Magnetic operation part Contact activation (MENU/ESC) (▲) (▼) (SET) • De-energized (De-energized in a normal environment) •...
Page 13 How to Use 4-1. Before Using the Detector All users must follow the operating precautions. Ignoring the precautions may damage the detector, resulting in inaccurate gas detection. 4-2. Precautions for Installation Points CAUTION This is a precision device. Because the detector may not perform appropriately in some environments, check the installation environment and take appropriate actions, if necessary.
Page 14 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 machinery must be stopped when maintenance is performed, where parts of the machinery must be removed to perform maintenance, or where the detector cannot be removed because tubes or racks prevent access to it.
Page 15 Introducing protective measures 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.
Page 16 Coil Load Power Power supply supply Alarm contact External relay (low voltage relay) *SK1, SK2: Surge absorbing parts 4-4. How to Install <Installation Dimensions and Maintenance Space> 150mm 1. Attach the detector to the mounting surface using four M5 screws. CAUTION Do not install the detector in a place where maintenance of the detector cannot be performed or where handling the detector involves dangers.
Page 17 4-5. Wiring CAUTION • Be careful not to damage the internal electronic circuit when wiring. In addition, be careful not to apply stresses on the detector when (overweight) cables are installed. • The power cables and signal cables must not be installed together with the motor power cables, etc.
Page 18 NOTE • The following table shows an example of overall outer diameters of cables. Use them for reference. Number of cores CVV 1.25sq CVV 2sq CVVS 1.25sq CVVS 2sq Ф9.5 Ф10.5 Ф10.0 Ф11.0 Ф10.0 Ф11.0 Ф10.5 Ф11.5 Ф10.5 Ф11.5 Ф11.0 Ф12.0 Ф11.5 Ф12.5...
Page 19 CAUTION The specified bare wire length must be observed when the wire insulation is peeled off. Improper clamping of the wire due to a shorter bare wire length may cause defective electric conduction or heating. Catching the wire insulation due to a shorter bare wire length may cause defective electric conduction or heating.
Page 20 <Attaching External Cable> Main unit case Cable gland External cable As shown on the figure below, attach the parts in the following order: cable gland, eccentric washer, washer, and rubber seal to the cable, then connect the cable into the main unit, then screw the cable gland to tighten the rubber seal.
Page 21 <Grounding> Connect the detector to your grounding terminal with the external terminal WARNING • Before turning on the detector, do not forget to connect it to a grounding terminal. • For stable operation of the detector and safety, it must be connected to a grounding terminal. Do not connect the grounding wire to a gas pipe.
Page 22 <Wiring Diagrams> Connecting to a Controller SD-1GH 1 2 3 4 5 RM-593, etc. +24 V Connecting to a DCS or PLC SD-1GH 1 2 3 4 5 Power supply Relay terminal plate (24 VDC) ＋－ Upper unit (DCS, PLC) －...
Page 23 How to Operate 5-1. Preparing for Start-up Before supplying power, read and understand the following precautions. Ignoring these precautions may cause an electric shock or detector damage. • Connect the detector to a grounding circuit. • Check that external device wiring is correct and secure. •...
Page 24 5-3. Starting the Detector • Before supplying power (24 VDC) to the detector, check that the detector is installed properly. • Supply power (24 VDC) to the detector (turn on the detector). • After the detector completes the start-up, it enters Detection Mode. CAUTION •...
Page 25 5-4. Modes Details on each mode are shown below. CAUTION • Do not change the settings unnecessarily. Changing the settings without understanding the specifications may cause malfunctions. Mode Item Display Details Detection Mode Normal state concentration Show the program version and others. ROM/SUM Display This is not typically used by the user.
Page 26 5-5. User Mode WARNING After the adjustment is completed, press MENU/ESC to return to Detection Mode. (If the detector remains in User Mode, it automatically returns to Detection Mode in ten hours.) Detection Mode Press the MENU/ESC key for three seconds. User Mode 1-0.
Page 27 <Zero Adjustment "1-1"> This is used to perform a zero adjustment. WARNING To perform a gas calibration, you must perform both a zero adjustment and a span adjustment. Perform the zero adjustment and the span adjustment in this order. If they are performed in the wrong order or if only one of them is performed, accurate gas detection cannot be ensured.
Page 28 <Setting Display "1-2"> Show various setting values. 1-2. Press SET key. Alarm Setpoint Display Alarm Delay Time Display (seconds) Zero Suppression Value Display AL.: Only gas alarm activates Alarm Contact contact. Specification Display FAU.: Only fault alarm activates contact. A. or F.: Gas alarm or fault alarm activate contact.
Page 29 Operations and Functions 6-1. Gas Alarm Activation Gas alarm: Triggered when the concentration of detected gas reaches or exceeds the alarm setpoint value. NOTE The alarm setpoint is factory-set. The alarm delay time (standard: 2 seconds) can be cancelled if not needed.
Page 30 <Response to Gas Alarm> A gas concentration value exceeds the alarm setpoint When a gas alarm is triggered, take actions in accordance with your management rules for a gas alarm. Normally, take the following actions. • Check the reading of the detector. NOTE If a gas leak is momentary, the reading may already have dropped by the time you check it.
Page 31 INHIBIT Depending on the setting of section 4. 2.5 mA setting: 2.5 mA 4 mA, HOLD, 4 - 20 mA setting: 4 mA Power Off 0 mA Example of Gas Concentration and External Output 4 - 20 mA specification (Maintenance output: 2.5 mA setting) External output 22 mA 20 mA...
Page 32 6-4. Suppression Function The sensors used with the detector are influenced by environmental changes (temperature, humidity, and other characteristics) and interference gases, which affects the reading. Therefore, the reading might fluctuate around zero even in a normal environment. The suppression function obscures influences by environmental changes and interference gases around zero that have no meaning for your management rules for a gas alarm.
Page 33 Maintenance The detector is an important safety instrument. To maintain the performance of the detector and improve the reliability of safety, perform regular maintenance. 7-1. 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. •...
Page 34 7-2. Maintenance Mode WARNING After the adjustment is completed, press MENU/ESC key to return to Detection Mode. (If the detector remains in Maintenance Mode, it automatically returns to Detection Mode in ten hours.) Mode Item Details display 2-0.0 Gas Test 2-0.1 Alarm Test Test Mode 2-0.2 Fault Test...
Page 35 <Entering Maintenance Mode> Detection Mode While in Detection Mode, press and hold the MENU/ESC key for three seconds. User Mode 1-0. ROM/SUM displays. Scroll to the 1-3 Mode Switching item. User Mode In "1-3.", press the SET key. Then press the SET key again for three seconds.
Page 36 2-5. Various Electrical Settings Display Display various electrical settings. This is not used by the user. 2-6. Enter Factory Mode. This is not used by the user. rET. is displayed. 2-7. Press the SET key Return to User Mode. again to return to User Mode.
Page 37 <Alarm Test Mode "2-0"> Enter Maintenance Mode as described on page 35. Press SET key. 2-0.0 Gas Test Gas Test => P38 Alarm Test =>P39 2-0.1 Alarm Test Fault Test => P40 2-0.2 Fault Test LED Test => P40 2-0.3 LED Test Memory Test =>...
Page 38 Gas Test "2-0.0" Enter Alarm Test Mode as described on page 37. 2-0.0 Press SET key. Apply the test gas and perform the gas test. Stop applying the test gas. When the reading drops, press the MENU/ESC key to cancel the test and to go back to the original state.
Page 39 Alarm Test "2-0.1" Enter Alarm Test Mode as described on page 37 and scroll to 2-0.1. 2-0.1 Press SET key. Alarm Test ON/OFF (The contact setting is "Alarm", or "Alarm or Fault") Select either ON/OFF, and then press the SET key. Perform the gas alarm test by increasing or decreasing the reading with the ▲...
Page 40 Fault Alarm Test "2-0.2" Enter Alarm Test Mode as described on page 37 and scroll to 2-0.2. 2-0.2 Press SET key. Fault Test ON/OFF Select either ON/OFF. Switch ON and press the SET key to trigger the fault alarm. Return to OFF and press the SET key to cancel the test.
Page 41 Memory Test "2-0.4" Enter Alarm Test Mode as described on page 37 and scroll to 2-0.4. 2-0.4 Press SET key. When StA. is displayed, press the SET key again. When CAL. is displayed, the memory diagnosis is performed. When memory is correct, PASS is displayed.
Page 42 <Environmental Setting "2-4"> Set various operations and functions in the environmental setting. Enter Maintenance Mode as described on page 35 and scroll to 2-4. <<Environmental Setting 1>> 2-4. Environmental Setting Press SET key. 2-4.0 They are factory-set and not typically used by the user. 2-4.1 INHIBIT Setting Set Inhibit.
Page 43 7-3. Performing a Calibration Perform a zero adjustment and span adjustment as part of a complete calibration. Materials: • Zero adjustment gas • Span adjustment gas • 0.5 LPM fixed flow regulator (1.0 LPM fixed flow regulator for NH3) • Humidifier tube (not used for NH3 gas because the humidifier absorbs NH3) Detection Gas Full Scale Calibration Gas/...
Page 44 User Mode 1-0. ROM/SUM displays. Scroll to the 1-3 Mode Switching item. In "1-3.", press the SET key. Then press the SET key again for three seconds. The 2-0 item in Maintenance Mode displays. Scroll to the 2-1 menu item. Press SET key.
Page 45 <Span Adjustment "2-2"> CAUTION • Before starting a span adjustment, provide the detector with the span adjustment gas and wait until the reading stabilizes. Press SET key. Gas Introduction NOTE: The gas Screw the regulator into the cal cylinder, response must be at install the cal cup, and for all gases least 10% of the full except NH3, connect the regulator to the...
Page 46 NOTE • If the span adjustment fails, the detector returns to 2-2 after FAIL is displayed. In this case, the span adjustment has not been completed. Be sure you are using the correct calibration gas and check the tubing for a leak. If there are mistakes, perform the span adjustment again.
Page 47 h. Press and release SET. The existing heater current displays. Press and release SET. k. Adjust the heater current’s first digit. Detection Gas Heater Current 2000 ppm 130 mA ± 2 mA C2H5OH (Ethanol) 5000 ppm 167 mA ± 2 mA C3H3N (Acrylonitrile) 130 mA ±...
Page 48 h. Screw a 0.5 LPM regulator (1.0 LPM regulator for NH3) into a calibration cylinder containing the full scale concentration of the target gas or an equivalent surrogate gas concentration equivalent to the target gas’ full scale. Detection Gas Full Scale Gas/Concentration for Load Voltage 2000 ppm...
Page 49 o. Press and release SET. p. The display will either show PASS or the load voltage will flash. If the load voltage flashes, adjust the voltage to the correct value, shown above, and press and release SET. q. Press and release ESC to return to Maintenance Mode. Press and hold ESC to return to Detection Mode.
Page 50 Storage, Relocation, and Disposal 8-1. Storing the Detector The detector must be stored under the following environmental conditions. • In a dark place with normal temperature and humidity away from direct sunlight • In a place where gases, solvents or vapors are not present 8-2.
Page 51 Troubleshooting The Troubleshooting section describes frequent malfunctions but does not explain the causes of all the malfunctions. If the detector shows a symptom which is not explained in this manual, or still has malfunctions even though remedial actions are taken, please contact RKI. <Unit Abnormalities>...
Page 52 <Reading Abnormalities> Symptoms Causes Actions Sensor output drift Perform a zero adjustment and a span adjustment. Presence of Disturbances by interference gases, such as solvents, interference gas cannot be eliminated completely. A very small amount of gas may be leaking (slow The reading rises or leak).
Page 53 Product Specifications 10-1. ATEX/IECEx Specifications Model SD-1GH Detection principle Semiconductor Gas to be detected Combustible/toxic gas Concentration display Seven-segment LED (four-digit) Detection range See page 56 Display resolution See page 56 Detection method Diffusion type Alarm setpoint See page 56 Power display POWER lamp on (green) External output...
Page 54 10-2. ATEX/IECEx Outline Drawing SD-1GH - 54 -...
Page 55 10-3. TIIS Specifications Model SD-1GH Detection principle Semiconductor Gas to be detected Combustible/toxic gas Concentration display Seven-segment LED (four-digit) Detection range See page 56 Display resolution See page 56 Detection method Diffusion type Alarm setpoint See page 56 Power display POWER lamp on (green) External output Gas concentration signal/alarm contact (gas alarm or fault alarm, gas/fault common alarm)
Page 56 10-4. TIIS Outline Drawing 10-5. Full Scale, Alarm Point, Increments Detection Gas Full Scale Alarm Point Increment 2000 ppm 500 ppm 10 ppm C2H5OH (Ethanol) 5000 ppm 1000 ppm 25 ppm C3H3N (Acrylonitrile) 100 ppm 25 ppm 0.5 ppm C5H10O2 (Propyl acetate) 1000 ppm 200 ppm 5 ppm...
Page 57 10-6. Detection Principle Metal dioxide can measure a gas concentration based on changes in the electric conductivity of semiconductor caused by gas adsorbed on its surface. RL: Load resistance, Vo: Output voltage VH: Heater voltage, Vs: Sensor voltage SD-1GH - 57 -...
Page 58 Calibration Parts List NOTE: Contact RKI to order cylinders from pg. 43 and pg. 48 that are not listed below. Description Part Number Calibration cup (for everything except NH3) 81-1148 Calibration cup (for NH3) 81-1148-RIGH Flexible tubing (for use with NH3) 06-1248RK Humidifier, 24”, with tubing (not for use with NH3) 33-2002RK-01...
Page 59 Replacement Parts List Description Part Number C2H5OH (Ethanol), 0 – 2000 ppm replacement sensor SG-8565 C2H5OH (Ethanol), 0 – 5000 ppm replacement sensor SG-8565 C3H3N (Acrylonitrile), 0 – 100 ppm replacement sensor SG-8521 C5H10O2 ; MIB (Propyl acetate), 0 – 1000 ppm replacement sensor SG-8521 C6H6 (Benzene), 0 –...
Page 60 Definition of Terms Semiconductor This is a principle of the sensor installed in the detector. Output from the detector head fluctuates for a while after turning on the power. Initial clear This is a function to prevent alarm triggering during that time. Full scale Maximum value of the detection range.
Page 61 SD-1GH - 61 -...

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