UNI-TRAN PREMIUM PLUS TOXIC GAS DETECTOR USER MANUAL UT-P+-STXXXX (Picture of ST1200 Premium Plus Toxic Gas Detector) Part Number: MAN-0005-00 Rev.
Copyright © 2003 Net Safety Monitoring Inc. Printed in Canada This manual is provided for informational purposes only. Although the information contained in this manual is believed to be accurate, it could include technical inaccuracies or typographical errors. Changes are, therefore, periodically made to the information within this document and incorporated without notice into subsequent revisions of the manual. Net Safety Monitoring Inc.
Table of Contents Chapter 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Chapter 2 Installation and Start Up . . . . . . .
Figure 17 - Magnetic Reed Switch Activation . Calibration Procedure for UNI-TRAN Prem ium Relay Settings . . . . . . . . . . . . . . . . . . . . . . . . . Review Settings . . . . . . . . . . . . . . . . . . . . . . . . Start Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sensor Fault . . . . . . . . . . . . . . . . . . . . . . . . . . Sensor Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . Norm al . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hardware . . . . . . .
Chapter 1 Introduction Introduction The Uni-Tran micro-controller based toxic gas detector provides fast, accurate, continuous and cost effective monitoring of toxic gases in harsh industrial environments. Net Safety selects the very best electrochemical sensors from the world's leading manufacturers for use in its broad line of toxic gas detectors.
Chapter 2 Installation and Start Up What’s in the package Carefully remove all the components from the packing box(s). Check components against the packing list. Inspect all components for obvious damage and broken/loose parts. Notify the carrier and distributor immediately if damage is found or parts are missing. Location of Sensor(s) There are no absolute rules for determining the quantity and location of gas detection instruments within a particular facility.
Figure 1 Toxic Detector Layout Mounting The housing should be oriented so that the sensor is on the underside of the housing. Water will damage electronic devices. Seal conduit near housing entries to prevent water damage in the enclosure (refer to figure 2, 3, 4 and 5).
Dimensional Drawings Figure 2 Uni-Tran Premium plus dimensional drawing for the ST1200 ST1300 ST1400 ST1500 ST1600 toxic sensors.
Figure 3 Uni-Tran Premium dimensional drawing for the ST1200 ST1300 ST1400 ST1600 toxic sensors using sensor separation.
Figure 4 Uni-Tran Premium plus dimensional drawing for the ST1210 toxic sensor.
Figure 5 Uni-Tran Premium plus dimensional drawing for the ST1210 toxic sensor using sensor separation.
Wiring (refer to figure 7, 8, 9, 10, 11 and 12) NOTE: The wiring procedures in this manual are intended to ensure proper functioning of the device under normal conditions. However, because of the many variations in wiring codes and regulations, total compliance to these ordinances cannot be guaranteed. Confirm that all wiring complies with applicable regulations that relate to the installation of electrical equipment in a hazardous area. If in doubt, consult a qualified official before wiring the system.
non-hazardous area. Conform to local wiring codes. When pouring a seal, use a fibre dam to assure proper formation of the seal. Seals should never be poured at temperatures below freezing. The jacket and shielding of the cable should be stripped back to permit the seal to form around the individual wires. This will prevent air, gas and water leakage through the inside of the shield and into the enclosure. It is recommended that explosion-proof drains and conduit breathers be used.
The ST1210 sensors can be installed and wired directly to the UNI-TRAN Premium Plus housing and terminal board as per the wiring diagram (see Figure 10 ) or they may be remotely mounted using a sensor separation kit (JB2-3-ASSY) which is composed of a junction box and terminal strip (see Figure 11). The sensor and kit are then connected to the UNI-TRAN Premium Plus.
Wiring Diagrams Figure 7 Uni-Tran Premium Plus wiring drawing for the ST1400 toxic sensor 11
Figure 8 Uni-Tran Premium Plus wiring drawing for the St1400 toxic sensor using sensor separation 12
Figure 9 Uni-Tran Premium Plus wiring diagram for the ST1200, ST1300, ST1500 and ST1600 Toxic Sensors 13
Figure 10 Uni-Tran Premium Plus wiring drawing for the ST1200, ST1300 , ST1500 and ST1600 toxic sensor using sensor separation 14
Figure 11 Uni-Tran Premium Plus wiring drawing for the ST1210 toxic sensor 15
Figure 12 Uni-Tran Premium Plus wiring drawing for the ST1210 toxic sensor using sensor separation 16
Figure 13 Display Board Layout Installation Checklist The following checklist is provided for double checking the system to be sure that all phases of system installation are complete and have been performed correctly.
Relay Settings This option allows you to set the alarm levels, coil status and the latch status of the low and high alarm relays. The Following table describes the default settings for the various sensors.
In order to enter the main menu of the detector place the curved side of the magnet on the side of the enclosure at the 10 o’clock position (see Figure 15) where marked to actuate the magnetic reed switch or press the Cal/Reset switch. Release the magnetic reed switch or Cal/Reset switch after the timer has finished counting down from 10 to 0. In the main menu, the options are displayed and prompted for selection by displaying “YES?”.
“Latching” and “Non-Latching” until one is selected or a 5 minute timer expires in which case the unit returns to normal operation. Step 4. High relay options are set next. The high alarm relay cannot be set to a value lower than the low alarm relay setting or higher than 100 (25 for the ST1400 O2 sensor). The high alarm level is displayed in increments of 5 (.5% for the ST1400 O2 sensor) greater than the low alarm level selected in step 1 (21.
Calibration Procedure NOTE The Toxic Detector should always be calibrated when first installed in the field and prior to calibration we recommend that the toxic detector run for at least 4 hours. It is necessary to calibrate the UNI-TRAN Premium Plus when it is used as a stand-alone device and connected to other monitoring equipment requiring a precise 4 to 20mA output signal.
sequence the status LED alternates flashes of RED and GREEN, the analog output changes back and forth from 3.0 to 3.3mA and Fail Cal. message is displayed on the screen. The unit remains in this state until acknowledged by a manual Reset. After manual Reset the program will return to the normal operation mode using previous calibration values. Since the calibration was unsuccessful another attempt may be made or replace the sensor and re-try calibration.
Periodic Response Check We recommend that the toxic gas detector be verified or calibrated every 3 months. A typical response check involves the application of calibration gas to the sensor, then the observation of the response LEDs, analog output, display and external monitoring equipment. Be sure to prevent unwanted response of external monitoring devices and equipment during this procedure.
Summary of Main Menu Enter Main Menu: 10 second timer count down First Option: Calibrate Sensor, followed by the “YES?” prompt for selection Second Option: Set Relay Option, followed by the “YES?” prompt for selection Third Option: Review Settings, followed by the “YES?” prompt for selection Exit: Return to normal (if no option is selected) The following table of responses gives a detailed description of toxic detector conditions.
It is necessary to calibrate the UNI-TRAN Premium Plus when it is used as a stand-alone device and connected to other monitoring equipment requiring a precise 4 to 20mA output signal. The following calibration procedure should be followed to ensure an accurate correlation between the 4 to 20mA output signal and the sensor input signal.
Calibration Procedure for UNI-TRAN Premium Plus ST1400 O2 sensor Use clean ambient air as calibration gas otherwise, use certified instrument air. Be sure the UNI-TRAN Premium Plus is powered-up and is not indicating a fault; FAULT/CAL LED is showing a short green flash every 2.0 seconds (Confidence blip). Ensure that the sensor is in a clean air environment before beginning the calibration procedure. To enter the main menu, activate the magnetic reed switch or manual push button switch.
magnetic reed switch/CAL/RESET button when the desired level is displayed. The selection is acknowledged by flashing the selected level on the alphanumeric display. The range for the low alarm is 5 to 100 (17 - 20.5% for the ST1400 O2 sensor). The value increases in increment of 5 (.5% for the ST1400 O2 sensor) from 5 (17% for the ST1400 O2 sensor) through to 100 (20.5% for the ST1400 O2 sensor) until an alarm level is selected or a 5 minute timer expires in which case the unit returns to normal operation.
Start Delay When power is first applied to the monitor it will initiate a 90 second warm-up routine. During this time it will output 3.0mA and the Status LED will flash (slow) red. After warm-up, the monitor will enter the normal operation (clear) mode, the analog output will change to 4.0mA and the Status LED will blip green. Sensor Fault CAUTION The fault detection circuitry does not monitor the operation of external response equipment or the external wiring to these devices.
Visual Indicators (Light Emitting Diodes) The Toxic Detector provides various LEDs for identifying operating conditions. The indicators include a four digit LED alphanumeric display, a green/red Status LED and a green power LED. These LEDs are visible through the glass cover of the Uni-Tran transmitter explosion-proof enclosure. Magnetic Reset Switch A magnetically activated switch for programming, zeroing, and resetting the Toxic Detector is provided.
output indicates that the smog alarm threshold has been exceeded. Current output of 2.5 mA indicates the presence of a system fault. Current output of 3.3 mA indicates a build-up of particulate in the sensor chamber. Sensor Life Sensor response normally deteriorates slowly over a period of several years, depending on exposure, until there is no longer sufficient signal. When this condition occurs, calibration will not be possible, the analog output will lock at 2.
Chapter 6 Glossary of Terms Start Delay Uni-Tran Net Safety: power up delay in progress Switch On: magnetic reed switch is activated or manual reset switch is activated Calibrate Sensor: mode for calibrating the unit Auto Cal: automatic calibration mode Sensor Fault: fault present, sensor or sensor wiring failure (Not applicable to O2 sensor) Zero Set: calibration zero gas setting in progress (Not applicable to O2 sensor) Apply 50% Span: apply 50% calibration gas (Not applicable to O2 sensor)
De-Energized: relay is normally de-energized Latch Status: set the latch status of relays on alarm condition Latching: relay latches at alarm condition Non-Latching: relay does not latch in alarm condition Low Alarm Level: low alarm relay is activated High Alarm Level: high alarm relay is activated Calibration Complete: calibration completed successfully (Applicable only to O2 sensor) Apply Calibration Air: apply ambient air or certified instrument air (Applicable only to O2 sensor) 20.
Appendix A Net Safety Monitoring Inc. Electrostatic Sensitive Device Handling Procedure With the trend toward increasingly widespread use of microprocessors and a wide variety of other electrostatic sensitive semiconductor devices, the need for careful handling of equipment containing these devices deserves more attention than it has received in the past. Electrostatic damage can occur in several ways. The most familiar is by physical contact.
Appendix B Wire Resistance In Ohms Distance (Feet) AWG #20 100 1.02 0.64 0.40 0.25 0.16 0.10 0.06 200 2.03 1.28 0.08 0.51 0.32 0.20 0.13 300 3.05 1.92 1.20 0.76 0.48 0.30 0.19 400 4.06 2.55 1.61 1.01 0.64 0.40 0.25 500 5.08 3.20 2.01 1.26 0.79 0.50 0.31 600 6.09 3.83 2.41 1.52 0.95 0.60 0.38 700 7.11 4.47 2.81 1.77 1.11 0.70 0.44 800 8.12 5.11 3.21 2.02 1.27 0.80 0.50 900 9.14 5.75 3.61 2.27 1.43 0.90 0.57 1000 10.20 6.39 4.02 2.
Appendix C Specifications Sensor Specifications SENSOR ELEMENT H2 S (ST1200) electro-chemical H2 S (ST1210) electro-chemical SO2 (ST1300) electro-chemical CL2 (ST1500) electro-chemical CO (ST1600) electrochemical Operating Temperature Range -40/C to +50/C (-40F to +122F) -40/C to +50/C (-40F to +122F) -20/C to +50/C (-4F to +122F) to +105o F) -20/C to +50/C (-4F to +122F) -20/C to +50/C (-4F to +122F) Range of Detection 0 to 100ppm 0 to 50ppm and 0 to 20ppm 0 to 100ppm 0 to 50ppm and 0 to 20pp
< Enclosure Material: Copper Free Cast Alum inum < W eight: 3.2 Kg (7.0 lb) < Certifications: CSA and NRTL/C certified for hazardous locations. Class I, Division 1, Groups B, C and D, NEMA 4X and 7. IEC Rating Ex d IIB+H2 T5 NOTE: Electronics only - CSA and NRTL/C certified for hazardous locations Class I, Division 2 Groups B, C and D pending. < Current Output: 4-20 m A Into a m axim um loop im pedance of 800 Ohm s at 32 Vdc or 150 Ohm s at 10.5 Vdc. Isolated or non-isolated loop supply.
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