Omega Engineering PHTX-11 Satellite Radio User Manual
Contents
1. AGREEMENT BY OMEGA ENGINEERING INC OR ANY BREACH OF ANY WARRANTY BY OMEGA ENGINEERING INC SHALL NOT EXCEED THE PURCHASE PRICE PAID BY THE PURCHASER TO OMEGA ENGINEERING INC FOR THE UNIT OR UNITS OR EQUIPMENT DIRECTLY AFFECTED BY SUCH BREACH Return Requests Inquiries Direct all warranty and repair requests inquiries to OMEGA Customer Service Department telephone number 203 359 1660 Before returning any instrument please contact the OMEGA Customer Service Department to obtain an authorized return AR number The designated AR number should then be marked on the outside of the return package To avoid processing delays also please be sure to include 1 Returnee s name address and phone number 2 Model and Serial numbers 3 Repair instructions EOMEGA ENGINEERING INC One Omega Drive Box 4047 Stamford Connecticut 06907 0047 203 359 1660 Telex 996404 Cable OMEGA FAX 203 359 7700 OMEGA is a registered trademark of OMEGA ENGINEERING INC Copyright 1986 OMEGA ENGINEERING INC All rights reserved including illustrations Nothing in this manual may be reproduced in any manner either wholly or in part for any purpose whatsoever without written permission from OMEGA ENGINEERING INC Printed in U S A M446 026 TABLE OF CONTENTS PART I INTRODUCTION Specifications General Description PART II INSTALLATION 1 Unpacking 2 Mounting 3 Wiring PART III OPERATION INSTRUCTION amp TECHNICA2. the highest pH point of the range The adjustments are sensitive and interactive do not attempt large changes work both ad justments in turn with small changes RANGE 2 is with jumpers 1 and 2 in place The output is ad justable for a span of 2 to 6 pH units RANGE 3 is with jumpers 1 2 and 3 in place The output is adjustable for a span of l or 2 pH units SPAN ZERO adjustments interact and require going back and forth between them Connect a millivolt source or preferably a pH simulator at the input a resistor at the temperature compensation terminals Refer to Table I for the correct resistor and millivolt values Adjust the Zero for 4 mA and the Span for 20 mA at the desired pH levels vious Wig hI qe SSIUJNIIV SOIHAVUY dOHSIg ay 7007 EEN ON 9NIMYHO E US 0 X208 44 522 neva al li SY V Hd XLi 23200 S319NV SNOIIOVMJ 031312395 ASIMYSHLO SSIINN SIINVYITOL Qypog NANI GAVO Arra 5 9 5 Se gece oe yalwrn owzd 679225 YL Y7AQOW DA AMOS E E PA Ph _ K Aradas Y71419 x IMa 03107051 Z BA IE 22 100 M24 MS Kidd ns lt 57990 2919 9 SON ARK 39oyy 7 44 NOIlIdINISIO SNOISIA3H TABLE I Temp o c 259C 40 C 50 C 70 C 90 C 00 oH mv mv mv mv mv mv mv 0 379 3 4414 0 434 9 448 8 476 6 504 4 518 2 1 325 1 354
3. 9 372 8 384 7 408 5 432 3 444 2 2 270 1 295 8 310 7 2532055 340 5 360 3 370 2 3 216 8 236 6 248 5 256 5 272 4 288 2 296 1 4 162 6 177 5 186 4 192 4 204 3 216 2 2221 5 108 4 118 3 124 2 128 2 136 2 144 2 148 1 6 54 19 59 15 62 13 64 12 68 09 72 05 74 03 7 0 0 0 0 0 0 0 8 54 19 59 15 62 13 64 12 68 09 2 05 74 03 9 108 4 118 3 124 2 128 2 136 2 144 1 148 1 l0 162 6 177 5 186 4 192 4 204 3 216 2 222 1 11 216 8 236 6 248 5 256 5 272 4 288 2 296 1 12 270 1 295 8 310 7 320 6 340 5 360 3 370 2 13 325 1 354 9 372 8 384 7 408 5 432 3 444 2 14 2379 3 414 0 434 9 448 8 476 6 504 4 518 2 Temp Comp Res 20 27K 8 66K 5 94K 4 74 3 08 1 98 1 58 967 42g L0 4 ANIWLSTILGY 0032 gt LNAWLSNLGV Nbas ANIWLSNLIY 4d y 3901751 39094 ING N AUN3WASDEOV 2522 HP Uomo ue LAA 1 4070519 767 9 4 HILIMS 9NIQVJSM AV dSIQ y SWOISNJHIQ M3LLINSNVMI HI TABLE II PANEL CUT OUT Ed 17 ER HOLE eo l10 L ECMEGA ENGINE EIR MG INC One Omega Orive 4047 Stamtora Connecticut 06907 0047 203 359 1660 Telex 996404 Cable OMEGA FAX 203 359 7700 OMEGA Your Source for Process Measursment and Control TEMPERATURE 1 Thermocouple RTD amp Thermistor Probes amp Assemblies O Connector Systems and Pane
4. L INFORMATION 1 Controls 2 Operation PART IV CALIBRATION 1 Calibration interval 2 Equipment required 3 Calibration procedure PART V SERVICE 1 Block diagram 2 Table I 3 5 Transmitter dimensions input output connections and Adjustment pot location 4 Table II Page No N 4 5 5 6 Spans Input Impedance Output Current Power Supply Load Resistor Linearity Temperature Coefficient Accuracy Repeatability Output meter Supply Voltage Effect Operating Temperature R H Isolation Common Mode Rej Temperature Compensation MODEL PHTX 11 SPECIFICATIONS Any 1 thru 14 jumper programmable zero and span adjustable lx 1013 ohm 4 to 20mA 12 to 80 VDC 10 to 50 1 49 vog 0 to 3400 ohms 01 pH 02 C Display and current out 01 pH 01 pH 3 digit LCD 01 Volt 10 to 60 C 0 to 95 600 VDC peak 120dB 4 60 Hz Manual or auto PART I INTRODUCTION General description The OMEGA Model PHTX 11 is a 2 wire pH ORP transmitter featuring input out put isolation wide power supply range high input impedance LCD digital display modular construction programmable span selection manual automatic temperature compensation and a NEMA 4X housing as a standard enclosure The Model 11 accepts as its input any pH probe via a BNC co axial connector It transforms the probe signal to a 4 to 20mA D C signal that may be
5. MODEL PHTX 11 pH Two Wire Transmitter Operator s Manual An OMEGA Group Company FAR 3 33S UU WARRANTY OMEGA warrants this unit to be free of defects in materials and workmanship and to give satisfactory service for a period of 13 months from date of purchase OMEGA Warranty adds an additional one 1 month grace period to the normal one 1 year product warranty to cover handling and shipping time This ensures that our customers receive maximum coverage on each product If the unit should malfunction it must be returned to the factory for evaluation Our Customer Service Department will issue an Authorized Return AR number immediately upon phone or written request Upon examination by OMEGA if the unit is found to be defective it will be repaired or replaced at no charge However this WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of being damaged as a result of excessive current heat moisture vibration or misuse Components which wear or which are damaged by misuse are not warranted These include contact points fuses and triacs THERE ARE NO WARRANTIES EXCEPT AS STATED HEREIN THERE ARE NO OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND OF FITNESS FOR A PARTICULAR PURPOSE IN NO EVENT SHALL OMEGA ENGINEERING INC BE LIABLE FOR CONSEQUENTIAL INCIDENTAL OR SPECIAL DAMAGES THE BUYER S SOLE REMEDY FOR ANY BREACH OF THIS
6. he display will indicate the output current to mA normally 4 0 mA to 20 0 mA pH CAL potentiometer is an offset adjustment for the pH probe on the input circuit board This adjustment allows standardization of different probes it affects the displayed readout and the output current Slope potentiometer is a gain adjustment on the input circuit board This adjustment is used to standardize the readings for probes with less than 100 efficiency it affects the displayed readout and the output current R19 potentiometer is a gain adjustment on the output circuit board This adjustment is factory set and should not need adjustment in the field it affects the displayed pH readout only ZERO potentiometer is an offset adjustment on the output board This adjustment sets the 4 mA output current level for the desired pH level it is used in conjunction with the range switch Zero pot affects the output current only There is interaction between the Zero and Span pots SPAN potentiometer is a gain adjustment on the output board This adjustment sets the 20 mA output current level for the desired pH level it is used in conjunction with the range switch The Span pot affects the output current level only There is interaction between the Zero and Span pots Range jumpers are located on the output board These jumpers allow the user to increase the sensitivity of the output There are 4 jumper pairs of pads the upper
7. ital multimeter 2 3 D C power supply 24 to 30 volts 2 4 Load resistor 250 ohm or 500 ohm Calibration Procedure 3 1 Connect the equipment as shown in block diagram Use an 8 66K resistor for manual temperature compensation at the terminals with the resistor symbol 25 C compensation Refer to Table I for resistance values and input millivolt values for other temperatures 3 2 Before making any adjustments the output jumper should be in the full range position Range 1 Input adjustments should not be made while the output is in an over current condition ie greater than 20mA Remove the cover from the range switch and turn all switches Off 3 3 pH CAL adjustment is made with the input at zero volts from the millivolt source Or a pH of 7 on the pH Simulator Adjust the pot until the display reads 7 00 3 4 SLOPE adjustment is made with the input at 14 pH on the pH Simulator Refer to Table I for the millivolt equivalent if a millivolt source is used Adjust Slope for a reading of 14 00 3 5 Output ranging is accomplished with the jumpers described in Section 1 7 they are used in conjunction with the Span and Zero adjustments RANGE 1 is with Jumper 1 in place The PHTX 11 is shipped with this jumper in place The output is adjustable for a span of 6 to l pH units for spans of less than 14 pH the Zero adjust sets for the 4 mA point at the lowest pH point of the range and the Span sets the 20 mA point at
8. ls O Wire Thermocouple RTD and Thermistor O Calibrators and Ice Point References O Recorders Controllers and Process Monitors O Data Acquisition Modules and Data Loggers Computer Sensor Interface PRESSURE STRAIN O Transducers O Strain Gauges O Load Cells O Pressure Gauges O Instrumentation FLOW C Rotameters O Flowmeter Systems LJ Air Velocity Indicators O Turbine Paddlewheel Systems O Vortex Meters and Flow Computers pH L Electrodes O Benchtop Laboratory Meters O Controllers O Calibrators Simulators L Transmitters Ne LN NY OMEGA 2 ENGINEERING INC An OMEGA Group Company One Omega Drive Box 4047 Stamford Connecticut 06907 0047 203 359 1660 Telex 996404 Cable OMEGA FAX 203 359 7700
9. most position is not used there are no traces connected to this pair of pads Jumper 1 is located in the pair of pads second from the top and this jumper is for full scale output currents of 6 to l4 pH units Jumper 2 is located in the third pair of pads it may be added to obtain a full scale output of 2 to 6 pH units Jumper 3 is added for a full scale output of 1 to 2 pH units 2 Operation 2 1 Initialization of the transmitter consists of making the connections described in the wiring section II 3 of this manual and placing the sensor in a known buffer solution and turning the power on The display should indicate the pH value of the buffer solution Probe standardization is accomplished by adjusting pH CAL with the probe in a 7 0 pH buffer solution for a reading of 7 0 and the Slope adjustment when the probe is in a 4 0 pH or a 10 0 buffer solution The choice of a 4 0 or 10 0 is up to the user i 4 2 3 Test the display by pressing the display switch The display should indicate mA and the decimal point should shift one place to the right PART IV CALIBRATION 1 The recommended calibration interval for the transmitter is six months under normal operating conditions and assuming the sensor is in good condition This system may need adjustment to compensate for reduced efficiency of the sensor before the calibration interval Equipment Required 2 1 pH Simulator or a millivolt source 2 2 Precision dig
10. rews and nuts 2 3 Pipe Mounting attachment to a round pipe requires U bolts and nuts The U bolts should bolt to the heavy PVC mounting feet 3 2 4 Panel Mounting refer to Table II for hole sizes and locations This mounting requires the PVC mounting feet and four PVC mounting blocks The blocks are drilled and tapped for 10 24 screws Wiring 3 1 3 2 3 3 3 4 3 5 3 6 After the enclosure is properly mounted the wires for input output ground and remote temperature sensing should be routed through the en closure hubs These connections should be trimmed to the proper length and connected to the circuit board assembly The circuit board assembly should then be placed in the enclosure and fastened to the bottom of the enclosure with the two phillips head screws supplied The input probe connector is a BNC jack mounted on the input circuit board Use only a coaxial cable that has isolation around the shield The shield is isolated from ground and this isolation should be maintained for proper operation For best results the probe cable should not be longer than 10 feet Long cables result in slow response because the probe must charge the cable capacitance through the high probe source resistance The output wires are isolated from the input and ground connections are made to the terminal strip observing polarity to the terminals marked out These wires are to be connected to a D C power supply thro
11. transmitted over 2 wires to a control location The signal wires also provide power to the transmitter The output is monitored by placing a load resistor in the current loop Any D C power supply from 12 to 80 volts may be used The input is iso lated from the output to prevent accidental damage of sensitive data gathering equipment at the control location The pH level is constantly displayed on a 35 digit L C D A push button switch allows the display to indicate the mA output on command The user can change the range of output signal by utilizing jumpers on one of the circuit boards and adjusting the zero and span pots The 4 to 20mA output can be for the full 0 to 14 pH range or as little as l pH unit for example 6 to 7 pH PART II INSTALLATION 1 Unpacking After unpacking remove instrument cover remove shipping ties or clamp Note any special instructions included in the package 2 Mounting 2 0 Before mounting the signal conditioner enclosure remove the assembled circuit boards by removing the two phillips head screws in the bottom of the enclosure 2 1 Conduit Mounting the unit can be supported by ridged conduit using the appropriate size hubs in the ends of the box ie 1 2 or 3 4 Cut the threaded male portion to allow room for the circuit board 2 2 Flat Surface mounting to a flat surface requires the heavy PVC mounting feet be attached to the box The surface should be drilled and the feet mounted with 10 sc
12. ugh a load resistor The wires can be as long as necessary The Loop resistor can be either in the positive or negative power supply lead The value of the loop resistor depends on the voltage required at the monitoring location Calculate the required power supply voltage from the following equation Minimum power supply voltage 12 02 x RL A convenient value for the loop resistor might be 250 ohms re sulting in a 1 to 5V output signal using this as an example RL 250 ohms VO 1V to 5V Minimum supply voltage 12 02 x 250 17V The maximum supply voltage is 80V The temperature probe is optional If the probe is used it should be connected to the terminal strip connection marked with the resistor sym bol The probe cable should be shielded and the shield connected to the ground terminal Manual temperature compensation requires only a resistor at the terminal strip connection marked with a resistor symbol Refer to Table I for the value vs temperature An 8 66K resistor is normally supplied with the transmitter this value is correct for 25 C compensation re sistor used should be metal film 50 ppm C or wire wound ppm C PART III OPERATING INSTRUCTIONS TECHNICAL INFORMATION 1 Controls l 1 1 4 1 5 1 6 Display switch is labeled Press for mA on the cover The display will indicate 0 00 pH to 14 00 pH when the switch is in the relaxed position When the switch is pressed and held t
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