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Scott Instruments GasPLUS-IR 4699IR Series Operation & Maintenance Manual

Infra-red gas transmitter
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Bacharach Series 4600-IR
GasPLUS-IR Infra-Red Gas Transmitter
A l l t r a d e m a r k s , b r a n d n a m e s , a n d b r a n d s a p p e a r i n g h e r e i n a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s .
• C r i t i c a l a n d e x p e d i t e d s e r v i c e s
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Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate, representative, or authorized distributor for any manufacturer listed herein.
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Summary of Contents for Scott Instruments GasPLUS-IR 4699IR Series

  • Page 1 Bacharach Series 4600-IR GasPLUS-IR Infra-Red Gas Transmitter Limited Availability Used and in Excellent Condition Open Web Page https://www.artisantg.com/54254-7 A l l t r a d e m a r k s , b r a n d n a m e s , a n d b r a n d s a p p e a r i n g h e r e i n a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s . •...

  • Page 2: Safety First

    ® Series 4688IR/4679IR Series 4688IR/4679IR Series 4688IR/4679IR Series 4688IR/4679IR Series 4688IR/4679IR Operation & Maintenance Manual SERIES 4600-IR ! SAFETY FIRST ! THREE KEY POINTS TO OPERATIONAL SAFETY To assure both personnel and facility safety, it is extremely important to observe all transmitter installation and operational safety requirements.
  • Page 3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 4: Transmitter Quick Start

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Transmitter Quick Start 1. Mount and wire the transmitter (See "Transmitter Installation"). 2. Apply power to the transmitter. All segments and indicators on the display will turn on for 2 seconds, then will turn off for 2 seconds. The transmitter will subsequently enter a 30 second warm-up period (countdown shown on the display).
  • Page 5 Model 4688-IR / 4679-IR Operation & Maintenance Manual Manual #087-0007G, 10/2003 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 6: Table Of Contents

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Contents Start-Up, General Information, & Installation _________ Introduction _____________________________________________ 6 Principle of Operation _____________________________________ 6 Other Gas Sensitivities - Model 4688-IR ONLY __________________ 6 Lower Explosive Limit - Model 4688-IR ONLY ___________________ 7 Suitability For Use in Hazardous Locations _____________________ 7 Using a Flowcell _________________________________________ 7 General Instrument Overview Map _________________________ 8...
  • Page 7 Periodic Maintenance ____________________________________ 57 Troubleshooting ____________________________________________ 62 General Difficulties ______________________________________ 62 Fault Codes ____________________________________________ 63 Resetting Factory Defaults _________________________________ 66 Contacting Scott Instruments _______________________________ 66 Technical Specifications _____________________________________ 67 Appendix 1 - MODBUS Registers & Coil Addressing ______ 68 ®...

  • Page 8: Start-Up, General Information, & Installation

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Start-Up, General Information, & Installation Manual #087-0007G, 10/2003 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 9: Introduction

    A local display reports concentration readings in units of either %LEL or %V/V (user selectable), as well as system status. The operator panel interface uses a Scott Instruments magnetic screwdriver for accessing the system parameters and may be password protected. Non-intrusive user setup and calibration permits operation and maintenance from within classified areas.

  • Page 10: Lower Explosive Limit - Model 4688-Ir Only

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Lower Explosive Limit - Model 4688-IR ONLY Combustible gas mixtures can be ignited only between certain concentration limits. These limits are known as the Lower Explosive Limit (LEL) and the Upper Explosive Limit (UEL). When these terms are used, it is assumed that a normal atmospheric air background (20.9% O ) is present.

  • Page 11: General Instrument Overview Map

    Model 4688-IR / 4679-IR Operation & Maintenance Manual General Instrument Overview Map Alphanumeric Display - Used for displaying decimal values in the range -999 to -0.00 and 0.000 to 9999, hexadecimal values in the range 0000 to FFFF, and text labels representing parameters during user setup.

  • Page 12: Transmitter Installation

    Code (CEC) requirements. All conduit connections should be sealed and contain a drain loop to protect the transmitter electronics from moisture. 10. Direct bold sunlight. Scott Instruments recommends using a sunshade if the instrument will be mounted in direct sunlight.

  • Page 13: Using The Rain Shields And Filters

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Using the Rain Shield and Filters Using different combinations of the transmitter's filters optimizes air flow to the detector. 1. For Outdoor Use - Non-Hose Down Enviroments: Use the rain guard (096-2709), but not optics assembly inner filter (077-0166).
  • Page 14 Model 4688-IR / Model 4679-IR Operation & Maintenance Manual O-RING (P/N 009-0024, VITON) OUTER SHIELD SUBASSEMBLY POREX FILTER MEMBRANE w/ DRAINAGE HOLE (P/N 077-0210-1) INNER FILTER CAGE POREX FILTER (P/N 077-0209) Figure 2 -Rain Guard - P/N 096-2709 O-RING (P/N 009-0024, VITON) 1/4"...

  • Page 15: Wiring And Power

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Wiring and Power Current Draw Upon instrument start-up, the GasPlus-IR will experience a 500 mA transient current draw. Immediately thereafter, current draw will drop to the instrument's 250 mA i , eventually "settling" down" to the 130 mA typical current draw.

  • Page 16: Mounting The Transmitter

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Current Sourcing and Sinking Modes (see Figure 7) The GasPlus-IR may be wired in a current sourcing (most typical) or a current sinking mode. As the names suggest, these 2 modes describe the direction of current flow in the 4-20 mA loop connecting the GasPlus-IR transmitter and its receiver.
  • Page 17 Model 4688-IR / 4679-IR Operation & Maintenance Manual 1. Unscrew transmitter cover and turn power switch to the "OFF" position. DO NOT REMOVE OR INSER DO NOT REMOVE OR INSER T THE BO T THE BO ARD ST ARD ST ACK while the ACK while the DO NOT REMOVE OR INSER...

  • Page 18: Powering The Transmitter

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual 2. Disconnect the ribbon cable located on the top (CPU) board in the transmitter enclosure. Grasp the board and pull outward. 3. Make power, loop, and relay wire connections (18 to 22 AWG wire is recommended), then connect the 9 conductor (master-to-remote) cable as shown in Figure 10.

  • Page 19: Installation Drawings

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Installation Drawings ENCLOSURE (2) 3/4" NPT CONDUIT FITTINGS - MOUNTING ONE EACH SIDE (CONDUIT BLOCK 5.44 [138.2] CUSTOMER SUPPLIED) (074-0289) 3/4" NPT X-PROOF UNION (048-0040). INSERT KWIKO FIBER FILLER THEN FILL WITH SEALING CEMENT (096-2211).

  • Page 20: Communications Connections

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Figure 6 - RS-485 Communications Connections Figure 7 - RS-232 Communications Connections Manual #087-0007G, 10/2003 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 21 Model 4688-IR / 4679-IR Operation & Maintenance Manual POW ER SWITCH Place in the OFF position before removing Display / CPU board stack. Ensure Note: The AL1 and AL2 relays are assumed to be field programmed as non-fail safe power switch is in (normally de-energized).
  • Page 22 Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Current Source Mode, Isolated Loop Power POW ER SW ITCH Place in the OFF position before removing Display / CPU board stack. Ensure power switch is in the OFF position prior to replacing board stack.
  • Page 23 Model 4688-IR / 4679-IR Operation & Maintenance Manual Separation not to exceed 50 feet. Figure 10 - Optional Remote Display Connections Manual #087-0007G, 10/2003 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 24: Transmitter Operation

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Transmitter Operation Manual #087-0007G, 10/2003 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 25: Basic Instrument Adjustments

    Navigating the Instrument All adjustments on the GasPlus-IR are made non-intrusively through the front panel of the instrument with a Scott Instruments magnetic screwdriver. A "Parameter Navigation Map" is also provided at the beginning of the "Technical Reference" section. Four keys are used for all settings: Also referred to as the "Escape"...

  • Page 26: Adjusting Lcd Display Contrast

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual From RUN mode, the user can access the menus by touching the magnet to (Up) or (Down) key then selecting the E (Enter) key. The Z (Esc) key is used to back out of the menu and return to RUN mode. The instrument continues to sense gas and transmit a signal when it is not in RUN mode.

  • Page 27: Acknowledging Latched Alarms

    Latched alarms may be reset only after conditions have returned to normal (concentration is below the alarm reset point). To reset a latched alarm, momentarily apply, then remove, the Scott Instruments magnet to any key. Observe that the specific alarm indication has cleared from the main display.
  • Page 28 Document your 0 %LEL (or %V/V) and the current loop output will be at 4.00 mA. adjustment schedule Zeroing the transmitter requires a Scott Instruments magnetic screwdriver. requirements. This operation can also be performed remotely via the Modbus ® interface. The transmitter will not zero if faults are displayed (F.

  • Page 29: Adjusting The Loop Output Parameters

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Adjusting the Loop Output Parameters Adjusting the 4-20 mA Output Adjusting the 4-20 mA Output Adjusting the 4-20 mA Output Adjusting the 4-20 mA Output Adjusting the 4-20 mA Output (COMM Menu - MA.04 and MA.20) (COMM Menu - MA.04 and MA.20) (COMM Menu - MA.04 and MA.20) (COMM Menu - MA.04 and MA.20)

  • Page 30: Setting Alarm And Sensor Parameters

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Setting Loop Fault and Inhibit Levels Setting Loop Fault and Inhibit Levels Setting Loop Fault and Inhibit Levels Setting Loop Fault and Inhibit Levels Setting Loop Fault and Inhibit Levels (COMM Menu - MA.F and MA.I) (COMM Menu - MA.F and MA.I) (COMM Menu - MA.F and MA.I) (COMM Menu - MA.F and MA.I)

  • Page 31: Optional Alarm Relays

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Alarm Concentration relays assume a non-fail-safe operation and the Fault relay assumes fail-safe operation. Changing these modes will reverse the normally open/normally closed status. Optional Alarm Relays Alarm Relay Settings - Model 4688-IR Combustible Alarm Relay Settings - Model 4688-IR Combustible Alarm Relay Settings - Model 4688-IR Combustible Alarm Relay Settings - Model 4688-IR Combustible...
  • Page 32 Using the Scott Instruments magnet, access the USER menu and select the accomplishes the accomplishes the accomplishes the accomplishes the accomplishes the desired alarm parameter.

  • Page 33: Sensor Parameters

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Latching / Non-Latching and Non-F Latching / Non-Latching and Non-F Latching / Non-Latching and Non-Fail- ail- ail- ail-safe / F safe / F safe / F safe / Fail- ail- ail- ail- Latching / Non-Latching and Non-F Latching / Non-Latching and Non-F ail-...

  • Page 34: Setting Transmitter Security

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual An example of the default report format is shown. (Date) (Time) ( F) (%LEL) (Alarms) (EOF) 001 9/23/97 14:30:05 76.0 0.01 0A04 (ID) (F1) (F2) (F3) (F4) (F5) (F6) RP.F1=2 RP.F2=6 RP.F3=7 RP.F4=9 RP.F5=11 RP.F6=13...

  • Page 35: Toggling Parameter Security On/Off (Lk.on)

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Toggling Parameter Security On/Off (LK.ON) To toggle the state of the lock, scroll to the LK.ON parameter and touch the magnet to the E (Enter) key. Observe the display changes to 000. Hold the magnet on the Up key until the display changes to the stored password (000 by default) and touch the Enter key.

  • Page 36: Instrument Parameter Change Example

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Instrument Parameter Change Example The example below will permit you to practice using the interface while actually setting the alarm 1 parameters for a transmitter set to monitor a gas requiring rising alarms. Note: The following is to be used as an example only and should not be used as a guideline for your transmitter's parameter(s) setup.
  • Page 37 Model 4688-IR / 4679-IR Operation & Maintenance Manual Manual #087-0007G, 10/2003 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 38: Serial Communications

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Serial Communications Manual #087-0007G, 10/2003 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 39: Setting Up For Digital Communications

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Setting Up For Digital Communications Wiring and configuring the GasPlus-IR for digital communication is fairly straightforward, though more involved than for analog transmission. Slight setup differences exist depending on whether RS-485 and RS-232 data transmission is used.
  • Page 40 Model 4688-IR / Model 4679-IR Operation & Maintenance Manual RS-485 data transmission requires a bus topology, as does Modbus™. Tw. Pair TRANSMITTER Tw. Pair (TYP) TRANSMITTER TRANSMITTER TRANSMITTER Bus Network Topology RS-485/232 T -485/232 T -485/232 T -485/232 Topology -485/232 T opology opology opology...

  • Page 41: Using Modbus ® Serial Communications

    "master" (application layer) device (i.e., proficient knowledge of the "master" (application layer) device (i.e., Scitec, PLC, etc.) to be used. Scott Instruments can only provide Scitec, PLC, etc.) to be used. Scott Instruments can only provide Scitec, PLC, etc.) to be used.

  • Page 42: Registers, Coils, And Addresses

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual TAG DATABASE EXAMPLE NAME TYPE UNIT ADDR RAW_ZERO RAW_FULL ENG_ZERO ENG_FULL ENG_UNITS FORMAT GAS_1 REAL IODev1 40019 100.0 100.0 ### EU TEMP_1 REAL IODev1 40021 100.0 100.0 ### EU GAS_2 REAL IODev2 40019 100.0...

  • Page 43: Accessing Parameter Data - The Abcs Of Reading And Writing

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Coil address Description Suggested Tag STS, relay 1 (1 = energized) STS, relay 2 (1 = energized) Refer to Appendix 1 Refer to Appendix 1 Refer to Appendix 1 Refer to Appendix 1 Refer to Appendix 1 STS, fault relay (1 = energized) STS, alarm indicator 1 (1 = active)

  • Page 44: Writing A Parameter To Memory

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual The other data access registers provide continuously-updated READ ONLY data for transmitter gas concentration, temperature, and status (see Appendix 1). All parameters defined in the USER, LOCK, COMM, and FACT menus are also available to users on a READ ONLY basis.
  • Page 45 Model 4688-IR / 4679-IR Operation & Maintenance Manual Manual #087-0007G, 10/2003 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 46: Instrument Navigation & Parameter Reference

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Instrument Navigation & Parameter Reference Manual #087-0007G, 10/2003 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 47: Parameter Navigation Map

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Parameter Navigation Map UICK LANCE FAULT INHIBIT MAINT USER LOCK COMM FACT FAULT FAULT Figure 11 - INHIBIT MAINT INHIBIT MAINT Parameter Navigation Map Alarm and Factory Lock Communications Sensor Functions Functions Functions Parameters.

  • Page 48: The User Menu

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual The USER Menu Adjusts alarm setpoints, relay operation, and various sensor parameters such as gas type, display engineering units. MODBUS Data Assigned Displayed Default Description Register Type Parameter Value Region Address [BITS] USER MENU - Alarm Relay Parameters Alarm 1 Set Point (High* Alarm) At or...

  • Page 49: Sensor Parameters

    Model 4688-IR / 4679-IR Operation & Maintenance Manual MODBUS Data Assigned Displayed Default Description Register Type Parameter Value Region Address [BITS] USER MENU - Alarm Relay Parameters (continued…) Maximum Negative Drift Fault Alarm - At %LEL(or or below this concentration the unit will 0 %LEL -5 %LEL equiv.
  • Page 50 Model 4688-IR / Model 4679-IR Operation & Maintenance Manual MODBUS Data Assigned Displayed Default Description Register Type Parameter Value Region Address [BITS] USER MENU - Sensor Parameters (continued…) Sensor Damping Constant - Specifies the damping time constant in seconds. This is the amount of time that it will take the unit to reach 63% of its final value when suddenly exposed to a known concentration of gas.
  • Page 51 Model 4688-IR / 4679-IR Operation & Maintenance Manual Data Assigned Displayed Default Description Address Type Parameter Value Region [BITS] USER MENU - Sensor Parameters (continued…) Sensor Temperature Units - Determines Unsigned the units of measure for the temperature SR.tU 0 (°F) PMEM 40336 Byte...

  • Page 52: The Lock Menu

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual The LOCK Menu Accesses the transmitter's security features. MODBUS Data Assigned Displayed Default Description Register Type Parameter Value Region Address [BITS] Lock On/Off (Password Entry Required) - Entering the current password in this field toggles the lock status from On to Off, or from Unsigned Off to On.

  • Page 53: The Comm Menu

    Model 4688-IR / 4679-IR Operation & Maintenance Manual The COMM Menu Accesses the transmitter's loop current, report generator, and serial communication parameters. MODBUS Data Assigned Displayed Default Description Register Type Parameter Value Region Address [BITS] COMM MENU - Loop Current Parameters 4.00 mA Loop Cal Point - This value can be adjusted to drive precisely 4.00mA to calibrate the...
  • Page 54 Model 4688-IR / Model 4679-IR Operation & Maintenance Manual MODBUS Data Assigned Displayed Default Description Register Type Parameter Value Region Address [BITS] COMM MENU - Report Generator Parameters Report Delimiter String - These parameters contain each character of the null terminated delimiter string which is printed between fields of the report line.

  • Page 55: Serial Communication Parameters

    Model 4688-IR / 4679-IR Operation & Maintenance Manual MODBUS Data Assigned Displayed Default Description Register Type Parameter Value Region Address [BITS] COMM MENU - Report Generator Parameters Real Time Clock (Month) - Used to set the internal real time clock month. ###### Rt.MO 1=January...
  • Page 56 Model 4688-IR / Model 4679-IR Operation & Maintenance Manual MODBUS Data Assigned Displayed Default Description Register Type Parameter Value Region Address [BITS] COMM MENU - Serial Communication (continued…) Serial Communication Mode - This parameter specifies which communication Unsigned 2(Modbus 40290 protocol to use: 0=None SC.Md...

  • Page 57: The Fact Menu

    Model 4688-IR / 4679-IR Operation & Maintenance Manual The FACT Menu FACT parameters are rarely used under "field" conditions. Typically these parameters are only used for troubleshooting and service issues. Refer to the "Troubleshooting & Maintenance" section for assistance in malfunction diagnosis.

  • Page 58: Maintenance, Troubleshooting, & Product Support

    Model 4688-IR Operation & Maintenance Manual Maintenance, Troubleshooting, & Product Support Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 59: Maintenance

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Maintenance Maintenance Safety The GasPlus-IR transmitter should be properly grounded before any maintenance is performed. Appropriate procedures to declassify the area (if necessary) should be followed. Routine Maintenance Inspecting Dust Filters Dust filters should be visually checked on a routine basis and replaced, if necessary.

  • Page 60: Periodic Maintenance

    Refer to "Cleaning the Mirror Assembly" to resolve dirt buildup issues. If it is unlikely that a dirt buildup is responsible OR the cleaning procedure has been performed with no results, contact the Scott Instruments Service department for further troubleshooting assistance (see "Contacting Scott Instruments").
  • Page 61 Model 4688-IR / 4679-IR Operation & Maintenance Manual STEP 3 - Without touching the sapphire window at the top of the mirror assembly (oil can absorb infrared radiation), dip the mirror assembly in a small quantity of fresh reagent grade isopropanol (e.g., Fisher Scientific #A416-20).
  • Page 62 Model 4688-IR / Model 4679-IR Operation & Maintenance Manual detector "T-can", is circular; the other, the emitter, is square. Carefully insert the emitter extraction tool (provided with the replacement emitter) in the slots on either side of the emitter and gently pull out. Insert replacement emitter (096-2193) into the slots and gently plug in.
  • Page 63 Model 4688-IR / 4679-IR Operation & Maintenance Manual L. Turn the toggle switch (S5) on the cpu board to the off position for at least 15 seconds then turn the toggle switch to the on position. (The transmitter will display all segments and indicators on just like the initial power up.) 4.
  • Page 64 Model 4688-IR / Model 4679-IR Operation & Maintenance Manual by the instrument. To ensure span accuracy the instrument's gas concentration units (USER menu: SR.CU parameter) may be changed to %v/ v prior to beginning the span procedure. The F.CAL parameter is then changed during the span procedure to match the %v/v value indicated on the calibration cylinder (see Step 6).

  • Page 65: Troubleshooting

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Troubleshooting General Difficulties Problem Solution Transmitter output is Transmitter was probably zero continuously negative. calibrated with hydrocarbons present. Apply a source of clean POWER air to the sensor (p/n 077-0019) SWITCH and zero instrument. Place in the OFF position before removing Display / CPU board stack.

  • Page 66: Fault Codes

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual this section. Fault Codes The GasPlus-IR continuously performs self-diagnostics (memory, software integrity, sensor performance, power, and loop output are checked two or more times a second). The fault indicator will appear under any of three conditions: 1.
  • Page 67 Model 4688-IR / 4679-IR Operation & Maintenance Manual Table 2 - Fault Code Table D ISPLAYED AS ASSOC IATED FAULT(s) LOOP LOOP + EE TEST TEST + EE LOOP + TEST More than one More than one More than one More than one More than one TEST + LOOP + EE...
  • Page 68 Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Table 2.1 - Fault Code Descriptions F A U L T S ET BY CL EA R ED B Y Cleared by re-en tering th e c orrec t S R .G N value P aram e ter m em o ry and th en verify ing all othe r p aram ete rs in the P M E M...

  • Page 69: Resetting Factory Defaults

    Contacting SCOTT INSTRUMENTS 251 Welsh Pool Rd. Exton, PA 19341 SCOTT INSTRUMENTS may be contacted Monday through Friday 8:30 am to 5:00 PM EST. Phone 1-610-363-5450 • FAX 1-610-363-0167 e-mail • service@scottinstruments.com Manual #087-0007G, 10/2003 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 70: Technical Specifications

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Technical Specifications GENERAL Sensor Type Non-dispersive infrared Detection Range See “Ordering Information” Linearity ± 2% below 40% full scale ± 5% from 40% to 110% full scale Repeatability ± 2% below 40% full scale ±...

  • Page 71: Appendix 1 - Modbus Registers & Coil Addressing

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Appendix 1 ® MODBUS Registers & Coil Addressing Register Address Description Suggested Tag 40001 Function select register 40002 Parameter select register 40003-40006 Character data registers CDR1 - CDR4 40007-40010 Integer data registers IDR1 - IDR4 40011-40014 Long data registers...

  • Page 72: Modbus Read-Only Register Descriptions

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual MODBUS READ-ONLY ® Register Descriptions The READ ONLY registers contain most of the status data typically required from most application using MODBUS serial communications. ® GAS: Gas concentration GAS: Gas concentration GAS: Gas concentration GAS: Gas concentration GAS: Gas concentration...
  • Page 73 Model 4688-IR / 4679-IR Operation & Maintenance Manual GFS: General Fault Status GFS: General Fault Status GFS: General Fault Status GFS: General Fault Status GFS: General Fault Status Provides detail on general instrument faults, as listed in Table 2 (see “Maintenance, Troubleshooting, &...

  • Page 74: Appendix 2 - (Fsr) Command Functions

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Appendix 2 (FSR) Command Functions Command functions are required whenever a value is to be written to the instrument. All command values are direct to the Function Select Register (FSR), located in address 40001. The FSR register recognizes 11 commands: Command (1): W Command (1): W...
  • Page 75 Model 4688-IR / 4679-IR Operation & Maintenance Manual CDR1 FAULT ALARM CDRBx AL1 ON CDRB0=1 AL1 OFF CDRB0=0 AL2 ON CDRB1=1 AL2 OFF CDRB1=0 FAULT ON CDRB2=1 FAULT OFF CDRB2=0 Application Note: When implementing the Alarm Test command (10), be sure to include the Alarm Reset command (11).
  • Page 76 Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Since there is no associated error checking, Scott Instruments strongly recommends that this parameter not be set above 9 minutes. Setting the IDR1 register to 0 cancels alarm inhibit. The set alarm inhibit timer function does not affect the RFF bit in the STS register.

  • Page 77: Appendix 3 - Instrument Cross-Sensitivity

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Appendix 3 Instrument Cross-Sensitivity In some applications the Model 4688-IR may be used to detect more than one combustible gas present in the atmosphere. Cross-sensitivity is defined as the reading produced by a one gas when the instrument is set to detect another (different) gas.
  • Page 78 Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Solution: Solution: Solution: Solution: Solution: > Set alarm 1 (A1.SP) to the lowest value, 14 %LEL. > Set alarm 2 (A2.SP) to the lowest value, 19% LEL For Cross Sensitivity information information, please contact Scott Instruments.

  • Page 79: Record Your Parameters

    Model 4688-IR / 4679-IR Operation & Maintenance Manual Record Your Parameters ! Parameter Label Transmitter # NOTES: A1.SP A1.RP A1.Sd A1.Rd A1.OP A2.SP A2.RP A2.Sd A2.Rd A2.OP AF.NL AF.OP AL.IP SR.CU SR.dC SR.dP SR.FS SR.GN SR.tU SR.ZM SR.Zd SR.ZY LK.ON LK.PW LK.tM MA.04...

  • Page 80: Spare Parts & Accessories

    Model 4688-IR / Model 4679-IR Operation & Maintenance Manual Spare Parts & Accessories Scott Instruments may be contacted Monday through Friday 8:30 AM to 5:00 PM EST. Toll Free 800-634-4046 • Phone 1-610-363-5450 • FAX 1-610-363-0167 ADAPTORS Part # Description...

  • Page 81: Scott Instruments Warranty

    Operation & Maintenance Manual SCOTT INSTRUMENTS Warranty The manufacturer, SCOTT INSTRUMENTS, LLC, warrants to the original purchaser and/or ultimate customer of the manufacturer’s products, that if any part(s) thereof (except for those listed below) proves to be defective in material or workmanship within 30 months from the date of shipment or 24...

  • Page 82: Index

    16 A1.Rd 45 mode 53 A1.RP 45 options 53 A1.Sd 45 Conduit seals 9 A1.SP 45 Contacting Scott Instruments 66 A2.OP 45 Contrast adjustment. See LCD A2.Rd 45 Cross-sensitivity 74 A2.RP 45 Current Loop Connections 17, 18 A2.Sd 45 Current Sinking Mode A2.SP 45...
  • Page 83 Model 4688-IR / 4679-IR Operation & Maintenance Manual LK.ON 32 LK.PW 32 F.AGC 59 LK.tM 32 F.PWD 59 Lock. See Security Indicator FACT Menu 54 Lock Menu 49 Factory Defaults Lock On/Off, security 32 resetting 66 Lock Password 32 Fail-safe relay 30 Lower Explosive Limit 7 Fault Code 63 descriptions 65...
  • Page 84 Model 4688-IR / Model 4679-IR Operation & Maintenance Manual SC.OP 53 SC.P 53 Parameter SC.RS 53 navigation map 44 SC.Rt 53 Parity Checking 53 SC.Sb 53 Periodic Maintenance 57 SC.VF 53 Security indicator 8 Selecting gas type 1 Sensor Quick Start 1 Concentration Units 46 Damping Constant 47 Decimal Precision 47...
  • Page 85 Model 4688-IR / 4679-IR Operation & Maintenance Manual Tagging Data Elements, configuring 38 Technical Specifications 67 Temperature 9 sensor 47 Temperature Units, sensor 48 Termination characters 30 Termination string 31 Transmitter Installation Accessibility 9 Ambient Temperature 9 bold sunlight 9 Conduit 9 electromagnetic fields 9 Gas Density 9...

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Gasplus-ir 4679ir series

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