Analytical Technology Q46/85 Operation And Maintenance Manual
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Analytical Technology Q46/85 Operation And Maintenance Manual

Peracetic acid measurement system
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Model Q46/85
Peracetic Acid
Operation and Maintenance
Home Office
Analytical Technology, Inc.
6 Iron Bridge Drive
Collegeville, PA 19426
Ph: 800-959-0299
610-917-0991
Fax: 610-917-0992
Email: sales@analyticaltechnology.com
Measurement
System
Manual
European Office
ATI (UK) Limited
Unit 1 & 2 Gatehead Business Park
Delph New Road, Delph
Saddleworth OL3 5DE
Ph: +44 (0)1457-873-318
Fax: + 44 (0)1457-874-468
Email:sales@atiuk.com

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  • Page 1 Model Q46/85 Peracetic Acid Measurement System Operation and Maintenance Manual Home Office European Office Analytical Technology, Inc. ATI (UK) Limited 6 Iron Bridge Drive Unit 1 & 2 Gatehead Business Park Collegeville, PA 19426 Delph New Road, Delph Saddleworth OL3 5DE...
  • Page 2 PRODUCT WARRANTY Analytical Technology, Inc. (Manufacturer) warrants to the Customer that if any part(s) of the Manufacturer's products proves to be defective in materials or workmanship within the earlier of 18 months of the date of shipment or 12 months of the date of start- up, such defective parts will be repaired or replaced free of charge.

  • Page 3: Table Of Contents

    6.25 Control Menu [CONTROL] ....45 Standard System ........5 6.26 Diagnostics Menu [DIAG] ......50 Features ............. 8 Q46/85 System Specifications ....9 PART 7 – CALIBRATION ........55 Q46H Performance Specifications ...11 PAA Calibration ........55 PART 2 – ANALYZER MOUNTING ....12 7.11...
  • Page 4 Table of Figures 1 - T ..................5 IGURE YPICAL YSTEM IAGRAM 2 - M ............ 6 IGURE ONITORING YSTEM W AYONET TYLE P NSOR 3 - S ............7 IGURE EALED LOWCELL SSEMBLIES W ONTROL 4 – Q46 E ..................

  • Page 5: Part 1 - Introduction

    Part 1 - Introduction General The Model Q46/85 is an on-line monitoring system designed for the continuous measurement of Peracetic Acid (PAA) concentration in solution. The full scale operating range of the system may be selected by the user for 0-20.00 ppm, 0- 200.0 ppm, or 0-2000 ppm, and the sensing system will operate on water...

  • Page 6: Standard System

    Part 1 – Introduction Standard System The standard model Q46/85 system includes three main components, the Q46 analyzer, a constant head flow cell, and a PAA sensor. A low-volume flowcell is also available for applications where sample flowrate and pressure can be carefully controlled.

  • Page 7: Figure 2 - Monitorings

    Q46H/85 PAA System Part 1 – Introduction Figure 2 below shows the same standard flowcell assembly and PAA sensor along with the conventional type pH sensor. A special adapter is required to hold the pH sensor in its proper location in the flowcell inlet chamber. Figure 2 - Monitoring System w/Bayonet Style pH Snsor O&M Manual Rev F (8/17)

  • Page 8: Figure 3 - Sealed Flowcell

    Q46H/85 PAA System Part 1 – Introduction Figure 3 below shows an installation using a (00-1522) sealed flowcell for the PAA sensor and a (00-1527) sealed flowcell for the pH sensor. This type of installation requires careful flow control. We recommend the use of our (03-0371) flow control assembly when using sealed flowcells.

  • Page 9: Features

    Q46H/85 PAA System Part 1 – Introduction Features · Standard Q46H Analyzers have fully inputs and outputs. Analog outputs are additionally completely isolated from each other · Available in either 90-260 VAC or 12-24 VDC power supply systems. All features remain the same in both variations.

  • Page 10: Q46/85 System Specifications

    Q46H/85 PAA System Part 1 – Introduction Q46/85 System Specifications isplayed Parameters Main input, 0.01 ppm to 2000 ppm Sensor temperature, -10.0 to 55.0 °C (23 to 131 ºF) Sensor Current, 0.0–999.9 nA, 0.000 to 99.99 uA Loop current, 4.00 to 20.00 mA...
  • Page 11 Q46H/85 PAA System Part 1 – Introduction Max. Sensor-to-Analyzer 100 feet (30.5 meters), with junction box Distance Flow Cell Constant head overflow, clear cast acrylic, 7-30 GPH, 15 GPH recommended, inlet is ¼” hose barb at 1/8” MNPT, outlet is ½” hose barb at 3/8” MNPT Power 90 - 260 VAC, 50-60 Hz, 10 VA max or 12-24 VDC, 500 mA max.

  • Page 12: Q46H Performance Specifications

    Q46H/85 PAA System Part 1 – Introduction Q46H Performance Specifications Accuracy 0.5% of selected range or 0.02 PPM Repeatability 0.3% of selected range or 0.01 PPM Sensitivity 0.05% of selected range Non-linearity 0.1% of selected range Warm-up Time 3 seconds to rated performance (electronics only) Supply Voltage Effects ±...

  • Page 13: Part 2 - Analyzer Mounting

    Part 2 – Analyzer Mounting General All Q46 Series instruments offer maximum mounting flexibility. A bracket is included with each unit that allows mounting to walls or pipes. In all cases, choose a location that is readily accessible for calibrations. Also consider that it may be necessary to utilize a location where solutions can be used during the calibration process.

  • Page 14: Wall Or Pipe Mount

    Q46H/85 PAA System Part 2 – Analyzer Mounting Wall or Pipe Mount A PVC mounting bracket with attachment screws is supplied with each transmitter as shown in Figure 5. The multi-purpose bracket is attached to the rear of the enclosure using the four flat head screws. The instrument is then attached to the wall using the four outer mounting holes in the bracket.

  • Page 15: Figure 6 - Wall Mountingd

    Q46H/85 PAA System Part 2 – Analyzer Mounting Figure 6 - Wall Mounting Diagram Figure 7 - Pipe Mounting Diagram O&M Manual Rev F (8/17)

  • Page 16: Panel Mounting

    Q46H/85 PAA System Part 2 – Analyzer Mounting Panel Mounting Panel mounting uses the panel mounting flange molded into the rear section of the enclosure. Figure 8 provides dimensions for the panel cutout required for mounting. The panel mounting bracket kit must be ordered separately (part number 05- 0094).

  • Page 17: Part 3 - Sensor/Flowcell Mounting

    Part 3 – Sensor/Flowcell Mounting General Select a location within the maximum sensor cable length for mounting of the sensor flow cell. Constant-Head Flowcell PAA sensors are best used in a constant-head overflow chamber because variations in sample flow rate and pressure can cause unstable readings. When monitoring low concentrations (below 0.5 PPM), this method should always be used.

  • Page 18: Sealed Flowcell

    Q46H/85 PAA System Part 3 – Sensor/Flowcell Mounting Once mounted, inlet and drain connections must be made. The flow cell contains a 1/8" MNPT inlet connection and a 3/8" MNPT drain connection. Hose barbs for the inlet and drain connections are supplied with the flow cell for use with flexible tubing.

  • Page 19: Figure 11 - Sealed P H F

    Q46H/85 PAA System Part 3 – Sensor/Flowcell Mounting Figure 11 - Sealed pH Flowcell Details O&M Manual Rev F (8/17)

  • Page 20: Submersion Mounting

    Q46H/85 PAA System Part 3 – Sensor/Flowcell Mounting Submersion Mounting Some applications are much easier done using the submersible sensor. This method can sometimes be used where flow is reasonably constant, and hydraulic head does not vary appreciably. PAA sensors can never be used in completely stagnant conditions.

  • Page 21: Part 4 - Electrical Installation

    Part 4 – Electrical Installation General The Q46 is powered in one of two ways, depending on the version purchased. The 12-24 VDC powered analyzer requires a customer supplied DC power supply. The 90-260 VAC version requires line power. Please verify the type of unit before connecting any power.

  • Page 22: Power Connection

    Q46H/85 PAA System Part 4 – Electrical Installation There is no standard ground resistance universally recognized. Many agencies recommend a ground resistance value of 5 ohms or less. The NEC recommends an impedance to ground of less than 25 ohms, and less than 5 ohms where sensitive equipment is installed.

  • Page 23: Figure 13 - Line Powerc

    Q46H/85 PAA System Part 4 – Electrical Installation Figure 13 - Line Power Connection The power strip, TB7, allows up to 12 AWG wire. A wire gauge of 16 AWG is recommended to allow for an easy pass-through into the ½” NPT ports when wiring O&M Manual Rev F (8/17)

  • Page 24: Figure 14 - Optional Relay

    Q46H/85 PAA System Part 4 – Electrical Installation Relay Connection Three SPDT relays are provided on the power supply board. None of the relay contacts are powered. The user must supply the proper power to the contacts. For applications that require the same switched operating voltage as the Q46 (115 or 230 V), power may be jumpered from the power input terminals at TB7.
  • Page 25 Q46H/85 PAA System Part 4 – Electrical Installation TB2, is used to connect to the optional 3-relay card (Figures 14) OR the optional third analog outputOut#3, Figure 15. The Q46 can be configured for only one of these optional features, and the hardware for either option must be factory installed Figure 15 - Optional Relay Board Wiring Figure 16 - Optional Analog Output Wiring...

  • Page 26: Direct Sensor Connection

    Q46H/85 PAA System Part 4 – Electrical Installation Direct Sensor Connection The sensor cable can be routed into the enclosure through one of cord-grips supplied with the unit. Routing sensor wiring through conduit is only recommended if a junction box is to be used. Some loose cable is needed near the installation point so that the sensor can be inserted and removed easily from the flowcell.

  • Page 27: Sensor Wiring

    Q46H/85 PAA System Part 4 – Electrical Installation Sensor Wiring The sensor cable can be quickly connected to the Q46 terminal strip by matching the wire colors on the cable to the color designations on the label in the monitor. A junction box is also available to provide a break point for long sensor cable runs.

  • Page 28: Junction Box Connection

    Q46H/85 PAA System Part 4 – Electrical Installation Junction Box Connection For installations where the sensor is to be located more than 25 feet from the monitor (max. 100 feet), a junction box must be used. The junction box is shown in Figure 19, and is supplied with a ½"...

  • Page 29: Part 5 - Sensor Assembly

    Part 5 – Sensor Assembly PAA Sensor Preparation The PAA sensor supplied with the Q46 is shipped dry. It will not operate until it is prepared by adding electrolyte and a membrane. Preparation of the sensor for operation must be done carefully. The procedure should be done by a qualified technician, and it should only be done when the system is ready for operation.

  • Page 30: Figure 21 - Submersible Paa S

    Q46H/85 PAA System Part 5 – Sensor Assembly Submersible PAA sensors are made up of two separate parts, a submersion holder that also contains the temperature compensating element and a sensing module. The sensing module screws into the holder, with an o-ring providing a water tight connection.

  • Page 31: Optional Ph Sensor

    Q46H/85 PAA System Part 5 – Sensor Assembly 6. Slowly screw the chamber onto the sensor body. A small amount of electrolyte will run out of the hole from which the fill screw was removed. Place a paper towel around the sensor to absorb the electrolyte overflow. The electrolyte is harmless and will not irritate skin.

  • Page 32: Part 6 - Configuration

    Part 6 – Configuration User Interface The user interface for the Q46 Series instrument consists of a custom display and a membrane keypad. All functions are accessed from this user interface (no internal jumpers, pots, etc.). RELAY 4-DIGIT INDICATOR MAIN DISPLAY MENU ICONS MENU ICONS SIGN...

  • Page 33: Keys

    Q46H/85 PAA System Part 6 – Configuration 6.11 Keys All user configurations occur through the use of four membrane keys. These keys are used as follows: MENU/ESC To scroll through the menu section headers or to escape from anywhere in software. The escape sequence allows the user to back out of any changes in a logical manner.
  • Page 34 Q46H/85 PAA System Part 6 – Configuration Lower Line During normal operation, the lower line of the display indicates user-selected secondary measurements that the system is making. This also includes calibration data from the last calibration sequence and the transmitter model number and software version.

  • Page 35: Software

    Q46H/85 PAA System Part 6 – Configuration Relay Area A/B The relay area contains two icons that indicate the state of the system relays (if the relay card is installed). Relay C is normally configured for FAIL indication, so it is only displayed on the lower MEASURE display line.
  • Page 36 Q46H/85 PAA System Part 6 – Configuration Any data that may be changed will be flashing. This flashing indicates user entry mode and is initiated by pressing the ENTER key. The UP arrow key will increase a flashing digit from 0 to 9. The LEFT arrow key moves the flashing digit from right to left.

  • Page 37: Figure 23 - Software Map

    Q46H/85 PAA System Part 6 – Configuration Start MENU MENU MENU MENU MENU MENU MEASURE CONTROL CONFIG DIAG SECTIONS (display only) ENTER ENTER ENTER ENTER Temperature Entry Lock Set Hold *PID 0% #1 ** Cal pH Set Delay Fault List *PID 100% #1 * PID % Output Contrast...

  • Page 38: Measure Menu [Measure]

    Q46H/85 PAA System Part 6 – Configuration 6.22 Measure Menu [MEASURE] The default menu for the system is the display-only menu MEASURE. This menu is a display-only measurement menu, and has no changeable list items. When left alone, the instrument will automatically return to this menu after approximately 30 minutes.

  • Page 39: Calibration Menu [Cal]

    Q46H/85 PAA System Part 6 – Configuration Offset = 0.0 nA Sensor output current at a zero ppm input. This value updates after a zero-calibration has been performed. Useful for resolving sensor problems. Q46S6 v 4.02 Transmitter software version number. Note: A display test (all segments ON) can be actuated by pressing and holding the ENTER key while viewing the model/version number on the lower line of the display.

  • Page 40: Configuration Menu [Config]

    Q46H/85 PAA System Part 6 – Configuration Set Range This function allows the user to set the display range of the transmitter to a specific application. Once set, all output functions use this display range to establish configuration settings. Press ENTER to initiate user entry mode, and the value will flash.
  • Page 41 Q46H/85 PAA System Part 6 – Configuration Contrast This function sets the contrast level for the display. The custom display is designed with a wide temperature range, Super-Twist Nematic (STN) fluid. The STN display provides the highest possible contrast and widest viewing angle under all conditions.
  • Page 42 Q46H/85 PAA System Part 6 – Configuration Iout#1 Mode This function sets analog output #1 to either track PAA (default) or enables the PID controller to operate on the PAA input. Press ENTER to initiate user entry mode, and the entire value will flash.
  • Page 43 Q46H/85 PAA System Part 6 – Configuration Relay B Mode Relay B can be used in a number of ways: as a setpoint Relay C Mode control, or as an alarm. The two settings for Relay B Mode are CON and FAIL. The CON setting enables normal setpoint operation for Relay B.
  • Page 44 Q46H/85 PAA System Part 6 – Configuration pH Type Allows the user to select either 1-Comb or 2-Q22P. The 1- Comb selection configures the monitor for a standard pH electrode without using its temperature compensation but in turn, uses the temperature compensator from the PAA sensor.

  • Page 45: Figure 24 - Automatic P H B

    Q46H/85 PAA System Part 6 – Configuration Table 1 Table 2 4.00 pH 7.00 pH 10.00 pH 4.00 pH 7.00 pH 9.18 pH ºC °C °C ºC °C °C 4.00 7.10 10.27 4.00 7.10 9.46 3.99 7.06 10.15 3.99 7.06 9.33 4.00 7.02...

  • Page 46: Control Menu [Control]

    Q46H/85 PAA System Part 6 – Configuration 6.25 Control Menu [CONTROL] The Control Menu contains all of the output control user settings: Set 4 mA These functions set the main 4 and 20 mA current loop Set 20 mA output points for the transmitter. The units displayed depend [Iout1=PAA] on the selection made in the CONFIG menu for Iout #1 Mode.
  • Page 47 Q46H/85 PAA System Part 6 – Configuration PID Setpnt The measured value which the controller is attempting to [Iout1=PID] maintain by adjusting output value. It is the nature of the PID controller that it never actually gets to the exact value and stops.
  • Page 48 Q46H/85 PAA System Part 6 – Configuration Set 4 mA #2 These functions set the second 4 mA and 20 mA current Set 20 mA #2 loop output points for the transmitter. The output may be set [temp/PAA/pH] to track temperature (default), pH, or PAA. The values stored for the 4 mA point may be higher or lower than the value stored for the 20 mA point.
  • Page 49 Q46H/85 PAA System Part 6 – Configuration *A Setpoint This function establishes the PAA trip point for relay A. The entry value is limited to a value within the range specified in “Set Range”. Use the LEFT arrow key to select the first digit to be modified.
  • Page 50 Q46H/85 PAA System Part 6 – Configuration When value rises to ≥ 1.050 ppm, relay opens. When value rises to ≥ 1.000 ppm, relay closes. 1.000 ppm 1.050 ppm HYSTERESIS HYSTERESIS PHASE: HI PHASE: LO “DEAD BAND” “DEAD BAND” 0.950 ppm 1.000 ppm When value falls to ≤...

  • Page 51: Diagnostics Menu [Diag]

    Q46H/85 PAA System Part 6 – Configuration If Relay B Mode is set to CON (see Relay B Mode), then *B Setpoint Relay B will function identically to Relay A. Relay B settings *B Hysteresis appear in the CONFIG menu list automatically. *B Delay *B Phasing *C Setpoint...
  • Page 52 Q46H/85 PAA System Part 6 – Configuration The Set Hold function can also hold at an output value specified by the user. To customize the hold value, first turn the HOLD function on. Press the ESC key to go to the DIAG Menu and scroll to Sim Output using the UP arrow key.
  • Page 53 Q46H/85 PAA System Part 6 – Configuration Press ENTER to initiate user entry mode, and the entire value will flash. Use the UP arrow key to modify desired value; range of value is 0-9999 seconds. Press ENTER to store the new value. Sim Out The Sim Out function allows the user to simulate the PAA level of the instrument in the user selected display range.
  • Page 54 Q46H/85 PAA System Part 6 – Configuration Press ENTER to initiate user entry mode, and the entire value will flash. Use the UP arrow key to modify desired value; selections are between 4mA, and 20mA. Press ENTER to store the new value. Fail Out #2 This function sets the fail-mode of current loop output #2 under a FAIL condition.
  • Page 55 Q46H/85 PAA System Part 6 – Configuration Start Delay This function is designed to minimize control or alarm issues arising from temporary power loss. When power goes down, the monitor records the analog output values and the status of relays and PID functions. When power is restored, the analog values and relays will be held at the pre-power loss values for a defined period of time.

  • Page 56: Part 7 - Calibration

    Part 7 – Calibration PAA Calibration Once power is applied, the sensor must be given time to stabilize. This is best done by following the zeroing procedure below. Establishing a stable zero is critical to the proper operation of the monitor. A complete calibration will include zeroing and spanning the sensor.

  • Page 57: Paa Span Cal

    Q46H/85 PAA System Part 7 – Calibration The system now begins acquiring data for the sensor zero calibration value. As data is gathered, the units for sensor current in nanoamps (nA) and temperature may flash. Flashing units indicate that this parameter is unstable.
  • Page 58 Q46H/85 PAA System Part 7 – Calibration 2. Turn on the inlet water flow to the flow cell and adjust the inlet flow rate so that water is overflowing from the inlet chamber. The best performance will be obtained when some water is always overflowing. This maintains constant flow and pressure on the sensor at all times.

  • Page 59: Temperature Calibration

    Q46H/85 PAA System Part 7 – Calibration Temperature Calibration The temperature calibration sequence is essentially a 1-point offset calibration that allows adjustments of approximately ±5 °C. The sensor temperature may be calibrated on line, or the sensor can be removed from the process and placed into a known solution temperature reference.

  • Page 60: Ph Calibration

    Q46H/85 PAA System Part 7 – Calibration pH Calibration The pH calibration menus will not be seen unless the optional pH sensor input is turned ON and a special pH sensor is connected to the input of the instrument. See Section 6.24 Configuration Menu [CONFIG] for more details.

  • Page 61: One-Point Ph Cal

    Q46H/85 PAA System Part 7 – Calibration Scroll to the next menu item by pressing the UP arrow key once. The menu item Cal pH buf1 will be displayed. 6. Press the ENTER key. The display will begin to flash. Using the UP and LEFT arrow keys, adjust the displayed number to the known value of the pH buffer.
  • Page 62 Q46H/85 PAA System Part 7 – Calibration Scroll to the next menu item by pressing the UP arrow key once. The menu item Cal pH buf1 will be displayed. 5. Press the ENTER key. The display will begin to flash. Using the UP and LEFT arrow keys, adjust the displayed number to the known value of the pH buffer.

  • Page 63: Part 8 - Pid Controller Details

    Part 8 – PID Controller Details PID Description PID control, like many other control schemes, are used in chemical control to improve the efficiency of chemical addition or control. By properly tuning the control loop that controls chemical addition, only the amount of chemical that is truly required is added to the system, saving money.
  • Page 64 Q46H/85 PAA System Part 8 – PID Controller Details é ù ò output ê ë ú û Where: output = controller output proportional gain integral gain derivative gain time e(t) = controller error (e=measured variable – setpoint) Figure 27 - Q46H ISA (Ideal) Equation The most notable feature of the algorithm is the fact the proportional gain term affects all components directly (unlike some other algorithms - like the “series”...

  • Page 65: Classical Pid Tuning

    Q46H/85 PAA System Part 8 – PID Controller Details Derivative gain. The addition of derivative control can be problematic in many applications, because it greatly contributes to oscillatory behavior. In inherently slow chemical control processes, differential control is generally added in very small amounts to suppress erratic actions in the process that are non-continuous, such as pumps and valves clicking on and off.

  • Page 66: Manual Pid Override Control

    Q46H/85 PAA System Part 8 – PID Controller Details Manual PID Override Control The Q46 PID output function allows the user to take manual control of the PID control signal. This is often useful when starting up a control loop, or in the event that you wish to bump the system manually to measure system response time.
  • Page 67 Q46H/85 PAA System Part 8 – PID Controller Details The easiest processes to control with closed-loop schemes are generally linear, and symmetrical, in nature. For example, controlling level in tank where the opening of valve for a fixed period of time corresponds linearly to the amount that flows into a tank.

  • Page 68: Part 9 - System Maintenance

    Part 9 – System Maintenance General The Q46/85 PAA System will generally provide unattended operation over long periods of time. With proper care, the system should continue to provide measurements indefinitely. For reliable operation, maintenance on the system must be done on a regular schedule. Keep in mind that preventive maintenance on a regular schedule is much less troublesome than emergency maintenance that always seems to come at the wrong time.

  • Page 69: Sensor Acid Cleaning

    Q46H/85 PAA System Part 9 – System Maintenance Even if no buildup is apparent on the membrane, it should be changed on a regular schedule. The recommended membrane change interval is every 3 months. For high purity water applications, this can probably be extended if desired, but a more frequent changing interval is a small price to pay for avoiding membrane failure at the wrong time.

  • Page 70: Flow Cell Maintenance

    Q46H/85 PAA System Part 9 – System Maintenance 3. Fill the beaker with distilled water to the level sufficient to submerge both the tip and the silver coil. Do not allow the connector at the back of the sensor to be submerged.

  • Page 71: Part 10 - Troubleshooting

    Part 10 – Troubleshooting 10.1 General The information included in this section is intended to be used in an attempt to quickly resolve an operational problem with the system. During any troubleshooting process, it will save the most time if the operator can first determine if the problem is related to the analyzer, sensor, or some external source.

  • Page 72: Analyzer Tests

    Q46H/85 PAA System Part 10 – Troubleshooting 6. Check for ground loops. Although the membrane sensor is electrically isolated from the process water, high frequency sources of electrical noise may still cause erratic behavior in extreme conditions. If readings are very erratic after wiring has been checked, check for a possible AC ground loop by temporarily disconnecting feed and drain lines from the flow cell while there is still water on the inside.

  • Page 73: Display Messages

    Q46H/85 PAA System Part 10 – Troubleshooting terminals. The temperature reading should display approximately 0°C and the PAA reading should display approximately 0 ppm. 10.4 Display Messages The Q46 Series instruments provide a number of diagnostic messages which indicate problems during normal operation and calibration. These messages appear as prompts on the secondary line of the display or as items on the Fault List.

  • Page 74: Figure 29 - Display Messages

    Q46H/85 PAA System Part 10 – Troubleshooting MESSAGE DESCRIPTION POSSIBLE CORRECTION PAA Cal Fail Failure of PAA calibration. FAIL icon will Clean sensor redo zero and span calibration. not extinguish until successful calibration If still failure, sensor slope may be less than has been performed, or 30 minutes passes 25% or greater than 250%.

  • Page 75: Sensor Tests

    Q46H/85 PAA System Part 10 – Troubleshooting 10.5 Sensor Tests 1. Check the membrane condition. A membrane that is not stretched smoothly across the tip of the sensor will cause unstable measurements. If necessary, change membrane and electrolyte. 2. Residual PAA sensors can be tested with a digital voltmeter (DVM) to determine if a major sensor problem exists.

  • Page 76: Figure 30 - Pt100 Rtd Table

    Q46H/85 PAA System Part 10 – Troubleshooting Temperature Resistance °C 100.0 101.9 103.9 105.8 107.8 109.7 111.7 113.6 115.5 117.5 119.4 Figure 30 - Pt100 RTD Table If you suspect that water has gotten into a cable connection on a flow type sensor or into the plug connection of a submersible sensor, disconnect the cable and allow the parts of the sensor to sit in a warm place for 24 hours.

  • Page 77: Spare Parts

    Q46/85 Front lid assembly 07-0310 Q46/85 Monitor, 100-240 VAC 07-0311 Q46/85 Monitor, 12-24 VDC 07-0314 Q46/85 Monitor, 100-240 VAC, w/Profibus 07-0315 Q46/85 Monitor, 12-24 VDC, w/Profibus 23-0029 Fuse, T-Lag, 630mA, 250V, TR-5 (for AC and DC Analyzers) 38-0072 Terminal block plug, 3 position (relays)

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