Detcon 1000 Series Operator's Installation And Instruction Manual
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Detcon 1000 Series Operator's Installation And Instruction Manual

H2s process analyzer - electrochemical sensor
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Detcon Model 1000
H
S Process Analyzer - Electrochemical Sensor
2
SAMPLE
SAMPLE
INLET
OUTLET
SAMPLE PRESSURE
10 PSIG (CONSTANT)
SAMPLE
INLET
Operator's Installation and Instruction Manual
Detcon Model 1000 Series H
1. The Model 1000 Series gas sample-conditioning assembly.
2. The Model DM-624 H
PART NO.
MODEL NO.
SERIAL NO.
INPUT VOLTAGE
FREQUENCY
CURRENT LOAD
AREA CLASSIFICATION
3200 A-1 Research Forest Dr.
The Woodlands, TX 77381
www.detcon.com
detcon inc.
AIR
AIR
INLET
AIR
SAMPLE
FLOW
FLOW
S Analyzer consists of two major assemblies:
2
S gas sensor (using Alcohol Free - Electrochemical Sensor or
2
Hi-Range Electrochemical Sensor)
DETCON, Inc.
4055 Technology Forest Blvd.,
The Woodlands, Texas 77381
Ph.281.367.4100 / Fax 281.298.2868
www.detcon.com
May 3, 2018• Document #2945• Revision 2.9

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Summary of Contents for Detcon 1000 Series

  • Page 1 Operator’s Installation and Instruction Manual Detcon Model 1000 Series H S Analyzer consists of two major assemblies: 1. The Model 1000 Series gas sample-conditioning assembly. 2. The Model DM-624 H S gas sensor (using Alcohol Free - Electrochemical Sensor or Hi-Range Electrochemical Sensor) DETCON, Inc.
  • Page 2 Model 1000 H2S Echem This page left intentionally blank Model 1000 H2S Echem Instruction Manual...

  • Page 3: Table Of Contents

    Model 1000 H2S Echem Table of Contents Introduction .............................. 1 DM-624 Sensor ............................ 1 Electrochemical Sensor ........................2 Microprocessor Control Circuit ......................2 Base Connector Board .......................... 3 Interference Data ..........................4 Enclosures ............................4 Specifications ............................5 Installation ..............................6 Mounting ..............................
  • Page 4 Table 2 Sample Flow Rate ..........................12 Table 3 Sample Flow Rate ..........................17 Shipping Address: 4055 Technology Forest Blvd., The Woodlands Texas 77381 Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067 www.detcon.com Phone: 888.367.4286, 281.367.4100 • Fax: 281.292.2860 • • sales@detcon.com...

  • Page 5: Introduction

    The analyzer requires a constant, liquid-free, 10±2psig sample pressure, which is provided by the customer or may be supplied by Detcon as a separate gas sample handling system. The on-board gas sample conditioning system includes a stainless steel pressure gauge (0-30psig), and a Genie membrane filter to provide the analyzer with absolute condensate liquid protection.

  • Page 6: Electrochemical Sensor

    Model 1000 H2S Echem Detcon MicroSafe™ Model DM-624, toxic sensors are non-intrusive “Smart” sensors designed to detect and monitor for H S gas in the ppm range. A primary feature of the sensor is its method of automatic calibration, which guides the user through each step via instructions displayed on the backlit LCD. The sensor features field adjustable, fully programmable alarms and provides relays for two alarms plus fault as standard.

  • Page 7: Base Connector Board

    Model 1000 H2S Echem Figure 3 Functional Block Diagram Figure 4 DM-624 Control Circuit 1.4 Base Connector Board The base connector board is mounted in the enclosure and includes: the mating connector for the control circuit, reverse input and secondary transient suppression, input filter, alarm relays, lugless terminals for all field wiring, and a terminal strip for storing unused programming jumper tabs.

  • Page 8: Interference Data

    Model 1000 H2S Echem 1.5 Interference Data DM-624 series electrochemical H S sensors are subject to interference from other gases. This interaction is shown in the following table as the relation between the amount of the interfering gas applied to the sensor, and the corresponding reading that will occur (in ppm).

  • Page 9: Specifications

    Model 1000 H2S Echem 2. Specifications Sensor Type Electrochemical cell Measurement Range 0-10ppm H S, up to 0-5 % H Accuracy/Repeatability ±10% of reading or ±0.5ppm, whichever is greater Response/Clearing Time T80 < 1 minute Operating Temperature -40°F to +122°F: -40°C to +50°C Outputs Linear 4-20mA DC;...

  • Page 10: Installation

    Model 1000 H2S Echem 3. Installation 3.1 Mounting Securely mount the Model 1000 analyzer panel or NEMA 4 enclosure (optional) in accordance with Figure 7. Figure 7 Unit Dimensions 3.2 Gas Connections and Sampling System Notes 1. Install a length of tubing from the desired sample point to the sample input port (as shown in Figure 8). Sample draw tubing should be 316 stainless steel of ¼"...

  • Page 11: Figure 8 Port Identification

    Set a flow of 100-200cc/min. and vent to a safe area using ¼” O.D. tubing. 3. Connect to the Over-pressure Relief valve and vent to a safe area. The pressure relief valve is set at Detcon to open at 15-20psig. For convenience sake, the sample bypass and over-pressure relief can be vented together.

  • Page 12: Figure 9 Optional Bubbler Bottle

    Model 1000 H2S Echem Air Inlet Port SAMPLE FLOW FLOW Optional Pressure Guage Acetic Acid Bubbler Sample Inlet Port Bottle Sample Calibrate S Vent Port Sample Bypass and Liquid NOTE: Rejection Exhaust Vent. These can be combined into a Over Pressure Relief Vent single Vent.

  • Page 13: Electrical Connections

    Model 1000 H2S Echem 3.3 Electrical Connections Customer Connections INPUT +24VDC 18-36 18-36 24VDC 24VDC 2.1A 2.1A -24VDC (Ground) 117VAC / 24VDC In 24VDC 18-36 2.1A 4-20mA, RS485, Alarm/Fault Sensor Relays Low Flow Air/ Sample Relays (Optional) SAMPLE FLOW FLOW Figure 10 Installation Wiring Connections 1.

  • Page 14: Relays And Rs-485 Setup

    Model 1000 H2S Echem 3.4 Relays and RS-485 Setup Program the alarms via the gold plated jumper tab positions located on the CPU board (Figure 11). Alarm 1 and Alarm 2 have three jumper programmable functions: latching/non-latching relays, normally energized/normally de-energized relays, and ascending/descending alarm set points. The fault alarm has two jumper programmable functions: latching/non-latching relay, and normally energized/normally de-energized relay.

  • Page 15: Figure 12 Rs-485 Dip Switches

    Model 1000 H2S Echem Table 1 Hexadecimal Conversion SW1 SW2 SW1 SW2 SW1 SW2 SW1 SW2 SW1 SW2 SW1 SW2 none Figure 12 RS-485 Dip Switches Model 1000 H2S Echem Instruction Manual Rev. 2.9 Page 11 of 30...

  • Page 16: Start Up

    Model 1000 H2S Echem 4. Start Up Upon completion of all tubing connections and field wiring the Model 1000 Series Process Analyzer is ready for startup. Note that after power is applied, varying readings may occur during sensor warm-up. Allow at least 1 hour for stabilization (24 hours is best).

  • Page 17: Operating Software

    Model 1000 H2S Echem 5. Operating Software 5.1 Programming Magnet Operating Instructions Operator interface to MicroSafe™ gas detection products is via magnetic switches located behind the transmitter faceplate. DO NOT remove the glass lens cover to calibrate or change programming parameters. Two switches labeled “PGM 1”...

  • Page 18: Calibration Mode

    Model 1000 H2S Echem 5.2.2 Calibration Mode Calibration mode allows for sensor zero and span adjustments. It uses an “AUTO SPAN” sequence with built in diagnostics to ensure adequate sensor response and signal stability “1-ZERO 2-SPAN”. Zero Adjustment Zero is set with no H S target gases present.
  • Page 19 Model 1000 H2S Echem c) Exit back to normal operations by holding the programming magnet over “PGM 2” for 3 seconds, or, the sensor will automatically return to normal operation in 30 seconds. Alarm 1 Level Adjustment The alarm 1 level is adjustable over the range 10% to 90% of range. For hydrogen sulfide gas sensors, the level is factory set at 20% F.S.

  • Page 20: Software Flow Chart

    Figure 14 DM-624 Software Flow Chart 6. Calibration and Maintenance The Model 1000 Series H S Process Analyzer is calibrated prior to shipment. Only minimal adjustment should be required at time of commissioning. However, it is highly recommended that a zero and span calibration be performed twice in the first week of operation to assure optimum system performance.

  • Page 21: Zero Calibration

    Material Requirements  Detcon Part Number 327-000000-000 MicroSafe™ Programming Magnet.  Detcon Part Number 942-001123-000 Zero Air cal gas. (Ambient air can be used, if it can be verified that no target gas is present).  Span gas cylinder containing H S gas in background N2 (nitrogen) as per the following range table.
  • Page 22 Model 1000 H2S Echem 1) Verify that the current calibration gas level is equal to the calibration span gas concentration. (Refer to Section 5.2.3 Program Mode, “View Sensor Status”. The item appears as “CAL LEVEL @ ### PPM”.) 2) If the calibration gas level setting is equal to the calibration span gas concentration, proceed to item “3)”. If the calibration gas level setting is not equal to the calibration span gas concentration, adjust the calibration gas level setting so that it is equal to the calibration span gas concentration.

  • Page 23: Programming Alarms

    8. Programming Features Detcon MicroSafe™ H S gas sensors incorporate a comprehensive program to accommodate easy operator interface and fail-safe operation. Program features are detailed in this section. Each sensor is factory tested, programmed, and calibrated prior to shipment.

  • Page 24: Rs-485 Protocol

    See section 3.5.4-f for details on changing the RS-485 ID number. The following section explains the details of the Modbus™ protocol that the Detcon MicroSafe™ sensor supports. Code 03 - Read Holding Registers is the only code supported by the transmitter. Each transmitter contains 6 holding registers which reflect its current status.
  • Page 25 Model 1000 H2S Echem Sensor life is an estimated remaining use of the sensor head, between 0% and 100% Example: 85=85% sensor life Register # High Byte Low Byte 40001 Detectable Range i.e. 100 for 0-100 ppm, 50 for 0-50% LEL, etc Register # High Byte Low Byte...

  • Page 26: Display Contrast Adjustment

    9600 baud, 8 data bits, 1 stop bit, No parity, and half duplex 485. 10. Display Contrast Adjustment Detcon MicroSafe™ sensors feature a 16 character backlit liquid crystal display. Like most LCDs, character contrast can be affected by viewing angle and temperature. Temperature compensation circuitry included in the MicroSafe™...

  • Page 27: Sensor Replacement

    Model 1000 H2S Echem 12. Sensor Replacement Should the electrochemical H S plug-in sensor (part number 370-323200-000 or 370-3H3H00-000) require replacement, use the following procedure: 1 - (A) If the sensor is mounted in a classified area, system power to the transmitter must first be removed before proceeding further.

  • Page 28: Spare Parts

    Model 1000 H2S Echem 14. Spare Parts Part# Description 327-000000-000 Programming Magnet 351-152021-400 24 VDC Pump Assembly 360-2424AS-030 24V DC-DC Converter 943-200000-000 Activated Carbon Scrubber 360-205421-024 24 VDC Power Supply 943-010013-505 500 CC Fixed Flow Regulator 823-101085-882 Genie Membrane Filter 350-300000-000 0.5Lpm Rotameter no valve 348-900000-000...

  • Page 29: Figure 16 Dm-624 Replacement Parts

    Model 1000 H2S Echem Spare Parts DM-624 H S Sensor Part# Description 942-010212-XXX Calibration Span Gas (XXXppm H S, balance nitrogen) (Where XXX denotes the gas level – 010 = 10ppm, 025 = 25ppm, 050 = 50ppm) 942-010213-XXX Calibration Span Gas (XXX% H S, balance nitrogen) (Where XXX denotes the gas level –...

  • Page 30: Warranty

    Detcon, Inc., further provides for a five year fixed fee service policy wherein any failed transmitter shall be repaired or replaced as is deemed necessary by Detcon, Inc., for a fixed fee of $65.00. The fixed fee service policy shall affect any factory repair for the period following the two-year warranty and shall end five years after expiration of the warranty.

  • Page 31: Flow Diagrams

    Model 1000 H2S Echem 16. Flow Diagrams 24VDC 10-30VDC 1.25A DC to DC Converter PN 360-2424TS-030 SAMPLE FLOW FLOW Sample Input Sample Calibrate Vent Vent Vent Span Gas Figure 17 Unit Flow Diagram Model 1000 H2S Echem Instruction Manual Rev. 2.9 Page 27 of 30...

  • Page 32: Figure 18 Pump Box Flow Diagram

    Model 1000 H2S Echem Sample Air Flow Flow Fault Fault Figure 18 Pump Box Flow Diagram Model 1000 H2S Echem Instruction Manual Rev. 2.9 Page 28 of 30...

  • Page 33: Wiring Diagram

    Model 1000 H2S Echem 17. Wiring Diagram Red 18AWG 24VDC 18-36 24VDC + DC IN 2.1A (Optional) Black 18AWG 24VDC Com 120VAC (L1) Neutral (N) AC IN Ground Customer Supplied Power Supply Box Assembly 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 White 18AWG Black 18AWG Green 18AWG...

  • Page 34: Revision Log

    Update Spare parts to reflect High Range sensor , Added new range (0-5%) to Sample Flow Rate tables 06/02/11 Updated drawings and Spare Parts List to show Detcon Aluminum condulet 09/19/11 Updated notation for VDC input in section 3.3 to match wiring...

This manual is also suitable for:

Dm-624

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