Myron L 900 Series Operation Manual
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Myron L 900 Series Operation Manual

Multi-parameter monitor/controller
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  • Page 1 900 Series Multi-Parameter ™ Monitor/Controller Operation Manual...
  • Page 2 Company and shall not be reproduced or copied without expressed ® written authorization from Myron L Company. ® The information contained within this document is subject to change without notice. Myron L ® Company does not guarantee the accuracy of the information. Page 2...
  • Page 3 Identifies information about practices that should be taken to avoid the potential for damage to, CAUTION or loss of use of, the 900 Series Monitor/Controller or other equipment or avoid a safety hazard to the user. Identifies information about practices or circumstances that can cause a significant likelihood...
  • Page 4 900 Series Operation Manual – 900OM r03-20 Trademark Information: Brand or product names are trademarks or registered trademarks of their respective owners. • Myron L is a registered trademark of the Myron L Company ® ® • 900 Series Multi-Parameter Monitor/Controller ™...
  • Page 5 900 Series Operation Manual – 900OM r03-20 HOW TO USE THIS MANUAL: The 900 Series Multi-Parameter Monitor/Controller Operation Manual was written to be most useful to all users, from novice to skilled professional. Most functions are programmed to prompt you through required settings, simply make selections and tap the NEXT button.

  • Page 6: Table Of Contents

    Sensors ..........................18 Conductivity/Resistivity/TDS/Salinity Sensors ............18 Pre-amplified pH/ORP Sensors (for use with the 900 Series pH/ORP Input)..19 BNC Style pH/ORP Sensors (for use with the 900 Series mV Input) ....... 19 Temperature Sensors ....................20 Flow Meter ........................20 INSTALLATION ........................
  • Page 7 900 Series Operation Manual – 900OM r03-20 Select Measurement Type ................... 40 RTD Temperature Input ....................... 41 Temperature Unit of Measure ..................... 41 4-20 mA Input ........................42 Select Measurement Type ................... 42 Measurement Settings, 4-20 mA ................. 42 Flow / Pulse Input ......................... 43 Sensor Settings, Flow/Pulse Input ................
  • Page 8 900 Series Operation Manual – 900OM r03-20 Percent (%) Rejection ....................65 User Mode Tempco and Ratio Settings ................66 Selecting the User Mode Solution Type ..............66 Disable or Customize Temperature Compensation ........... 67 Enter Custom Conductivity to TDS Ratio ..............67 Factory Reset ........................
  • Page 9 ORP SENSOR CAUTIONS ................89 Relay and Alarm Trigger, Set Point and Hysteresis Functionality ......90 MAINTENANCE ........................92 XIII. 900 Series Multi-Parameter Monitor/Controller Base Unit ..........92 Cleaning the Display ..................... 92 Calibrating the Display Touch Screen ................. 92 Sensor Care ........................... 92 pH and ORP Sensors ....................

  • Page 10: Introduction

    These highly accurate instruments have the ability for simultaneous monitoring and controlling of multiple inputs/outputs. Since temperature compensation (TC) is at the heart of accurate water measurement, all 900 Series Monitor/Controllers feature a highly refined and precise TC correction algorithm based on years of proven experience.

  • Page 11: Specifications

    Optional 100-240 VAC input power adaptor, available from Myron L Company ® To maintain the 900 Series Multi-Parameter Monitor/Controller IEC 61010-1 safety rating, only use external power supplies / adapters that are also IEC/UL 61010-1 or IEC/UL 60950-1 rated WARNING to the full operating temperature range of the instrument.
  • Page 12 900 Series Operation Manual – 900OM r03-20 c. Resistivity Range: 10 kΩ – 40 MΩ Resolution: 0.01 (<100 kΩ) 0.1 (<1000 kΩ) 0.01 (<10 MΩ) 0.1 (≤40 MΩ) Accuracy: ±1% of reading (factory calibration) Units: kΩ/MΩ (automatic) Temperature Compensation: Automatic compensation on KCl, 442™ and NaCl solutions from 0-71˚C/32-160˚F User adjustable temperature compensation: 0-10%/˚C...
  • Page 13 900 Series Operation Manual – 900OM r03-20 mV Input, DC Measurements [BNC Connector: mV IN] May be configured to display in ORP/mV or pH (w/TC) or pH (TC Off). NOTE: The shorting BNC connector cap (included) must be installed when there is no sensor connected to the mV input.
  • Page 14 900 Series Operation Manual – 900OM r03-20 Flow Switch/Kill Switch Input [Terminal Block: FLOW SW] Input Type: TTL Input Open Collector Dry Contact NOTE: The jumper (included) must be installed in the terminal block connector if there is no flow/level switch installed.
  • Page 15 900 Series Operation Manual – 900OM r03-20 Alarm Outputs [Terminal Block: RA #1 AND RA #2] Compatible Alarm Type Piezo Electric Alarm Model PAO (See “ACCESSORIES, Piezo Electric Alarm”, page 100) Remote Alarm Model RA (See “ACCESSORIES, Remote Alarm – RA™”, page 98)
  • Page 16 900 Series Operation Manual – 900OM r03-20 Housing Specifications: Industrial standard ¼ DIN chassis/panel cutout Easy access terminal connections to sensors and control outputs Enclosure Material: PC/ABS Enclosure Rating: IP65/NEMA 4X (front/face only), IP20 (housing) Dimensions (housing, without connectors): NOTE: The above dimensions do not reflect panel cutout dimensions or panel depth necessary for connectors or cabling with service loop.

  • Page 17: Ordering Information

    900 Series Operation Manual – 900OM r03-20 III. ORDERING INFORMATION 900 Series Models Order Part # Description 900M-1C Monitor/Controller with 1 Relay, 1 Alarm 900M-3C Monitor/Controller with 3 Relays, 2 Alarms, and 4-20 mA Output 900 Series Model Features 900M-1C...

  • Page 18: Sensors

    1000Ω RTD temperature sensor, mount into a standard ¾” NPT tee fitting, and come with a 10 ft./3 meter shielded cable attached. Conductivity/TDS/Salinity Sensors The 900 Series Multi-Parameter Monitor/Controller’s Conductivity, TDS, and Salinity use the CS951 or CS952 Sensors depending on the range and application. Order Part #...

  • Page 19: Pre-Amplified Ph/Orp Sensors (For Use With The 900 Series Ph/Orp Input)

    Pre-amplified pH/ORP Sensors (for use with the 900 Series pH/ORP Input) All Myron L ® Company 900 Series Pre-amplified ½” and ¾” NPT pH and ORP sensors have Ryton ® (PPS) sensor bodies and come with 10 ft./3 meter shielded cables attached. These sensors contain built- in precision 1000Ω...

  • Page 20: Temperature Sensors

    1000Ω RTD, 3-wire, 25 ft./7.6 meter cable Flow Meter Order Part# Description SPX-075 Flow Meter, ¾” Female NPT, (0.2-20 gpm), Polypropylene, Single Jet, Low Flow For additional/special order sensors contact your local distributor or the Myron L ® Company. Page 20...

  • Page 21: Installation

    900 Series Operation Manual – 900OM r03-20 INSTALLATION Unpacking and Inspection of Equipment 1. Inspect the shipping container. If it is damaged contact the shipper immediately for instructions. (Do not discard the box.) 2. If there is no apparent damage, unpack the container. Be sure all items shown below are present. If items are missing, notify the supplier immediately.

  • Page 22: Installing The 900 Series Multi-Parameter Monitor/Controller

    It must be easily reached; It must be marked as the disconnecting device for the equipment power supply. WARNING The sides and back of the 900 Series Monitor/Controller must be protected from: • Stream or spray of water. • High-humidity, condensing atmosphere.

  • Page 23: Select A Mounting Site

    Signal cables should be routed separate from line power cables or any other source of interference. NOTE: An optional 900 Series mounting bracket adapter is available to mount the 900 Series in a panel previously cut out for a 700 Series Monitor/Controller, order part number 9MBAPC (see Mounting Brackets, page 102).
  • Page 24 900 Series Operation Manual – 900OM r03-20 NOTE: If several devices are to be mounted on a panel next to each other, the panel cutouts must be positioned at least 0.56”/14mm horizontally and vertically away from each other. Image Not to Scale...
  • Page 25 900 Series Operation Manual – 900OM r03-20 1. After selecting the mounting location, mark the appropriate panel cutout and complete the necessary cuts. 2. Deburr the cutout edges to prevent damage and allow a watertight seal. 3. Place the panel gasket on the 900 and position it against the back of the bezel.

  • Page 26: Installing Sensors

    Sensors supplied by Myron L Company are specifically designed to be compatible with ® the 900 Series Monitor/Controller. They are supplied with properly wired mating connectors and have been tested to ensure the proper function of the sensor and of the 900 Series Monitor/Controller.

  • Page 27: Installing Ph/Orp Sensors

    900 Series Operation Manual – 900OM r03-20 Installing pH/ORP Sensors Most Myron L ® Company pH/ORP Sensors can be mounted at any angle. There should be a continuous and adequate flow to prevent the trapping of air bubbles within the sensor’s electrode which could prevent the sensor from functioning properly.

  • Page 28: Electrical Installation

    The electrical installation procedures provided in this manual are common to all 900 Series Multi-Parameter Monitor/Controllers. The 900 Series are powered by 24 VAC / 12-24 VDC. Before starting, ensure the input power supply is correct. Failure to do so is beyond the responsibility of the Myron L Company.

  • Page 29: Wiring Inputs And Outputs To The Connectors

    900 Series Operation Manual – 900OM r03-20 Wiring Inputs and Outputs to the Connectors The terminal block mating connectors should be unplugged from the back of the 900 while attaching the cable wires. If routing the cable through a conduit or strain relief, you should do that before attaching to the terminal block connector.

  • Page 30: Connecting Inputs, Outputs, And Power To The 900

    900 Series Operation Manual – 900OM r03-20 Connecting Inputs, Outputs, and Power to the 900 The 900 Series Multi-Parameter Monitor/Controllers utilize pluggable terminal blocks. Once the mating connectors are wired, with the power supply OFF, simply plug each connector into the corresponding terminal block (See Back Panel Connector Locations below).

  • Page 31: Initial Setup

    900 Series Operation Manual – 900OM r03-20 INITIAL SETUP When you power-up the 900 for the first time the instrument will display the Myron L Company Logo for a ® few seconds, then go to the “Initial Setup” screen. Here you will set the Date/Time, Location, Administrator Password, enable/disable Input Channels and select the Screen Layout.

  • Page 32: Location

    Myron L ® Company. Make sure the Administrator’s password is recorded in a secured location. If this password is lost the instrument CANNOT be reprogrammed without contacting the Myron L Company. ® 1. Set Up Administrator Password. Set Up Password: Select User...

  • Page 33: Enable/Disable Input Channels

    900 Series Operation Manual – 900OM r03-20 3. Set Up Operator Password. a. Tap the “Operator” field. The display will go to the “Set Up Security” screen. Select User to Configure 7:08 PM b. Tap the “Setup Password” field. c. Tap the “New Password” field.

  • Page 34: Screen Layout

    900 Series Operation Manual – 900OM r03-20 Screen Layout The 900 allows you to customize the layout of the screen displayed during normal operating mode. This is done from the “Select Screen Layout” screen. Directly below are examples of the different operating screens available.
  • Page 35 900 Series Operation Manual – 900OM r03-20 To select the Screen Layout: 1. Tap on the desired screen layout. The text of the selected option will turn white. 2. Tap the ACCEPT button. 3. The 900 will go directly into normal Operating Mode (see Normal Operating Screen, below).

  • Page 36: Detailed Operating Screen

    900 Series Operation Manual – 900OM r03-20 DETAILED OPERATING SCREEN The “Detailed Operating Screen” will display the basic settings of the selected input channel. This screen is the base point from which all settings are accessed after the initial setup.

  • Page 37: Detailed Operating Settings

    900 Series Operation Manual – 900OM r03-20 • Relays and Alarms Button: When in EDIT Mode, tapping this button brings you to the Relay/Alarm setting menu. • Right Arrow: Tapping this arrow brings you to the next input channel’s “Detailed Operating Screen”.

  • Page 38: Select Measurement Type

    TDS from compensated conductivity (ref. Conductivity Conversion to Total Dissolved Solids (TDS), page 85). The 900 Series conductivity, resistivity, TDS, and salinity measurements utilize temperature correction referenced to 25°C. The Solution Type determines the salt solution characteristic (temperature coefficient) used to determine what the value of the solution would be at 25˚C.

  • Page 39: Ph/Orp (Pre-Amplified)

    900 Series Operation Manual – 900OM r03-20 pH/ORP (Pre-amplified) Input Channel: pH/ORP The pH/ORP input channel is intended for use with Myron L Company pre-amplified pH and ORP ® sensors. These sensors contain precision circuitry that increases the accuracy and permit application of the sensors over greater distances.

  • Page 40: Mv Input (Bnc)

    900 Series Operation Manual – 900OM r03-20 To select the measurement type from the pH/ORP “Detailed Detailed Operating Screen 7:08 PM Operating Screen”: RELAY pH/ORP 1. Tap the ADJUST button to enter EDIT Mode. 2. Tap the Measurement Type button on the upper left side 7.12...

  • Page 41: Rtd Temperature Input

    900 Series Operation Manual – 900OM r03-20 RTD Temperature Input Input Channel: RTD Detailed Operating Screen 7:08 PM The RTD sensor settings allow you to customize the following: RELAY TEMP • Cable Length • Length Unit 25.0 • Ω / Length (cable resistance) ˚C...

  • Page 42: Ma Input

    Input Channel: 4-20 mA IN The 4-20 mA input is standard on all 900 Series models and allows the flexibility of connecting almost any 4-20 mA sensor, transmitter, or external device that transmits a 4-20 mA or 0-20 mA current. The 900 allows the user to select the desired units and range of measurement for display.

  • Page 43: Flow / Pulse Input

    900 Series Operation Manual – 900OM r03-20 Flow / Pulse Input Input Channel: FLO/PULSE For use with most flow/pulse sensors, the 900 displays flow rate and volume or pulse frequency. Sensor Settings, Flow/Pulse Input Flow sensor settings require the following settings:...

  • Page 44: Volume Reset

    900 Series Operation Manual – 900OM r03-20 Volume Reset Detailed Operating Screen 7:08 PM Note: This action is irreversible and the previous total/volume will be irretrievable. RELAY VOLUME FLO/PULSE To reset the counter for total volume from the FLO/PULSE “Detailed Operating Screen”: 56123.18...

  • Page 45: Relay Wiring Options

    • Make sure any device connected to the 900 Series relay outputs is sufficiently rated to handle load and voltage required by the device to be controlled. • Make sure that the wiring used to connect any device to the 900 Series WARNING Monitor/Controller relay outputs is at least 14 AWG.

  • Page 46: Relay Settings

    900 Series Operation Manual – 900OM r03-20 Connect the user supplied relay interface cable to the Monitor/Controller’s terminal block connectors, see image below. Connecting both power source leads to the relay terminal block connectors will damage the circuit board and may cause personal injury.

  • Page 47: Alarm Settings

    900 Series Operation Manual – 900OM r03-20 8. Enter set point(s) and hysteresis: Configure Set Point 7:08 PM a. Enter the set point: Tap the “Set Point” field. Type in the desired set point. Set Point 2000 µS iii. Tap “Enter”.

  • Page 48: Reset Latching Alarms

    900 Series Operation Manual – 900OM r03-20 6. Using the up and down arrows, select the desired input channel, then tap the NEXT button. 7. Tap the desired trigger type then tap the NEXT button. Configure Set Point 7:08 PM 8.

  • Page 49: Testing Relays And Alarms

    900 Series Operation Manual – 900OM r03-20 Testing Relays and Alarms Set Up Alarm 1 7:08 AM The relay/alarm Test feature allows you to verify connection and function by energizing or de-energizing the relay/alarm Status Enabled without having to change the set point(s).

  • Page 50: Relay/Alarm Settings Reset

    900 Series Operation Manual – 900OM r03-20 2. To turn OVERRIDE mode off from the “Detailed Operating Select Relay/Alarm 7:08 PM Screen”: a. Tap the ADJUST button to enter EDIT Mode. Relay #1 Enabled b. Tap the RELAY button on the top right side of the screen.
  • Page 51 900 Series Operation Manual – 900OM r03-20 In the Normal Operating Screen Example 1: • Relay 1 is disabled, but still linked to this input channel. 2020 • Relay 2 is enabled, linked to this input channel, and within normal operating range.

  • Page 52: Detailed System Settings

    900 Series Operation Manual – 900OM r03-20 VIII. DETAILED SYSTEM SETTINGS The System Settings are very similar to the Initial Setup, but instead of prompting you through each setting, you are able to select which setting(s) you wish to set up/adjust. In this section we will describe how to change any of the settings programmed during the initial setup.

  • Page 53: Passwords And Security

    900 Series Operation Manual – 900OM r03-20 Passwords and Security The password feature allows you to set password protection for different levels of access. Once the administrator password is set up, the administrator will be able to limit the access of operators to prevent unauthorized changes in settings / configuration.

  • Page 54: Operator Access Setup

    900 Series Operation Manual – 900OM r03-20 Operator Access Setup Once the Administrator’s password has been set up, you will be able to configure Operator Access. NOTE: If Operator Password is NOT set up, only the administrator will have access to the 900’s settings.

  • Page 55: Operator Password Setup

    900 Series Operation Manual – 900OM r03-20 Operator Password Setup To set up the operator password from any “Detailed Operating Screen”: 1. Tap the ADJUST button to enter EDIT Mode. Set Up Security 7:08 PM 2. Tap the SETTINGS button.

  • Page 56: Reset Administrator Password

    “OK”. The Administrator Password will be reset. NOTE: Resetting the administrator password automatically BACK resets the operator password. NOTE: If the administrator has forgotten their password, it may only be reset by a 900 Series Technician. Contact the Myron L Company. ®...

  • Page 57: Display Settings

    900 Series Operation Manual – 900OM r03-20 DISPLAY SETTINGS The Display Settings feature allows the user to customize the Set Up Display Settings 7:08 PM 900’s display to best fit their application. From the “Set Up Display Settings” screen you may select/adjust the following...
  • Page 58 900 Series Operation Manual – 900OM r03-20 Example of Operating Screens: Inputs Outputs Select Screen Layout 7:08 PM COND/RES1 1957 µS 0-10V 7.87 V All Channels 4-20mA 4.00mA COND/RES2 2020 µS Single Channel pH/ORP 7.16 Relay 1 Enabled Dual Channel...

  • Page 59: All Channels Screen Layout

    900 Series Operation Manual – 900OM r03-20 All Channels Screen Layout The All Channels screen layout allows you to view all inputs with their current readings, as well as outputs with their status. This screen allows quick access to many different areas: •...

  • Page 60: Brightness

    900 Series Operation Manual – 900OM r03-20 Brightness The display brightness feature allows you to adjust the display’s brightness for optimal viewing depending on location/lighting. To adjust the display’s brightness from the “Detailed Operating Set Up Display Brightness 7:08 PM Screen”:...

  • Page 61: Timeout Settings

    900 Series Operation Manual – 900OM r03-20 Timeout Settings The Timeout Settings allow you to program the 900 to exit the Timeout Settings 7:08 PM “Detailed Operating Screen” (or any other settings screen) and return to normal measurement mode after a user specified Status time of inactivity.

  • Page 62: Advanced Settings

    ADVANCED SETTINGS 0-10V Recorder Output The 900 Series 0-10V Recorder Output can be programmed to output 0-10 or 0-5 VDC and export signals from any input channel or derived % Rejection value to a remote meter, recorder, PLC, or SCADA system.

  • Page 63: Voltage Divider

    250Ω input impedance of a transmitter current input device. There are two modes in which current loop transmitters operate: 1. Self-Powered – the 900 Series monitor provides the power to drive the 0/4-20mA current. 2. Remote-Powered – the receiving instrument provides the power to drive the 0/4-20mA current.
  • Page 64 900 Series Operation Manual – 900OM r03-20 To set up the 0/4-20mA output from any “Detailed Operating Screen”: 1. Tap the ADJUST button to enter EDIT Mode. Select Output To Configure 7:08 PM 2. Tap the SETTINGS button. 3. Tap the “Advanced” field.

  • Page 65: Derived Measurement

    900 Series Operation Manual – 900OM r03-20 Enter the zero scale value (the measurement value to be output as 0 or 4mA). iii. Tap “Enter”. c. Tap the NEXT button. 9. Select the Output Range: a. Tap the desired output current (4-20mA/0-20mA).

  • Page 66: User Mode Tempco And Ratio Settings

    900 Series Operation Manual – 900OM r03-20 To Set up the % Rejection from any “Detailed Operating Screen”: 1. Tap the ADJUST button to enter EDIT Mode. 2. Tap the SETTINGS button. 3. Tap the “Advanced” field. 4. Tap the “Derived” field.

  • Page 67: Disable Or Customize Temperature Compensation

    5. The display will prompt you to verify you wish to perform a BACK Factory Reset, tap the ACCEPT button. 6. The 900 will perform a Factory Reset, briefly display the Myron L ® Company Logo, then display the Initial Setup screen. See Initial Setup (Section V) for instructions.

  • Page 68: Calibration

    Conductivity, TDS, or Salinity Calibration Input Channels: COND/RES1 and COND/RES2 The 900 Series only requires a single point calibration for conductivity, TDS, or salinity. Calibration is performed separately for each type of solution one wishes to measure, as well as for each input channel.

  • Page 69: Transfer Standard Method Of Calibration

    & certification. Preferably the hand-held instrument is calibrated with a standard solution as close as practicable to the area of the monitor/controller operation (example: for conductivity measurement in the 0-2000 μS range, the recommended Myron L ®...

  • Page 70: Resistivity Calibration

    Resistivity Calibration Input Channels: COND/RES1 and COND/RES2 The 900 Series only requires a single point calibration for Resistivity. Calibration is performed separately for each type of solution one wishes to measure, as well as for each input channel. There are 3 calibration methods for Resistivity: •...

  • Page 71: Sensor Substitute

    SETTING ADJUST calibrate resistivity monitor/controllers. Normally they are not necessary on the 900 Series due to its precision electronics. However, your requirements may be such that a crosscheck or verification is required. For this reason, a NIST traceable 20 MΩ Sensor Substitute is available from the Myron L Company, order model CS9-11.

  • Page 72: Fac Cal (Reloading Factory Calibration)

    900 Series Operation Manual – 900OM r03-20 8. Reprogram the correct sensor cable length: a. Tap the ADJUST button to enter EDIT Mode. b. Tap the Input Channel button on the top center of the screen. c. Tap the ACCEPT button to bypass sensor selection.

  • Page 73: Ph Calibration

    The 900 Series offers 1, 2, or 3-point pH calibration. You should always calibrate your instrument with a pH 7 buffer solution before adjusting the gain with acid or base buffers, i.e., 4 and/or 10. Either acid or base solution can be used for the 2 point “Gain”...
  • Page 74 900 Series Operation Manual – 900OM r03-20 2. Put the 900 into pH Calibration Mode: Detailed Operating Screen 7:08 PM a. Tap the ADJUST button on the desired input channel’s “Detailed Operating Screen” to enter EDIT Mode. RELAY pH (TC) pH/ORP b.

  • Page 75: Transfer Standard Calibration

    (if pH 4 was used) or base (if pH 10 was used). Transfer Standard Calibration Another method of calibrating a 900 Series pH measurement is via the transfer standard. Instead of removing the pH sensor from the process system, or the entire monitor/controller and sensor, and either returning it to the manufacture or sending it to a third party laboratory for recertification, the transfer standard allows for a quick check and return to service with less down time.

  • Page 76: Fac Cal (Reloading Factory Calibration)

    900 Series Operation Manual – 900OM r03-20 A single point transfer standard calibration adjustment depends on the value: 6.00 to 8.00 pH – Adjusts the offset Detailed Operating Screen 7:08 PM < 6.0 pH – Adjusts the gain for acid >...

  • Page 77: Orp Calibration

    Input Channels: pH/ORP and mV IN. The precision electronics in the 900 Series ORP circuitry does not require calibration. However, if you wish to adjust the offset of a sensor to match a known reference, the 900 offers a single point calibration.

  • Page 78: Fac Cal (Reloading Factory Calibration)

    900 Series Operation Manual – 900OM r03-20 To perform a transfer standard ORP calibration: 1. Using the calibrated hand-held instrument, measure the process liquid. NOTE: If the sensor installation is inline, it is best to measure the process liquid by means of a tap valve as close to the inline sensor as possible.

  • Page 79: Temperature Calibration

    900 Series Operation Manual – 900OM r03-20 Temperature Calibration The Myron L ® Company sensors utilize precision RTD temperature sensors and should not require calibration. However, the 900 does offer a single point calibration to allow you to adjust the temperature to a known value.

  • Page 80: Sensor Substitute, Temperature

    NIST traceable Sensor Substitutes may be used to verify and/or calibrate temperature monitor/controllers. Normally they are not necessary on the 900 Series due to its precision electronics. However, your requirements may be such that a crosscheck or verification is required. For this reason, NIST traceable...

  • Page 81: Fac Cal (Reloading Factory Calibration)

    900 Series Operation Manual – 900OM r03-20 5. Remove the Sensor Substitute. 6. Reconnect the sensor. 7. Reprogram the correct Sensor Cable Length. From the desired input channel’s “Detailed Operating Screen”: a. Tap the ADJUST button to enter EDIT Mode.

  • Page 82: 4-20Ma Output Calibration

    900 Series Operation Manual – 900OM r03-20 4-20mA Output Calibration Electronic Calibration The optional 4-20mA Output was calibrated at the factory; however, if you wish to check the calibration the following procedure will help you accomplish the task. These instructions assume the 4-20mA Output settings are already configured.

  • Page 83: Fac Cal (Reloading Factory Calibration)

    900 Series Operation Manual – 900OM r03-20 FAC CAL (Reloading Factory Calibration) To return the 4-20mA Output to factory calibration: 1. From any “Detailed Operating Screen”, tap the ADJUST button on the lower right side of the screen to enter EDIT Mode.

  • Page 84: Fac Cal (Reloading Factory Calibration)

    900 Series Operation Manual – 900OM r03-20 FAC CAL (Reloading Factory Calibration) FAC CAL: Returns the 0-10VDC Output to factory calibration, Offset Calibration erasing any previous calibration adjustment. 7:08 PM To return the 0-10VDC Output to FAC CAL: 1. Put the 900 in 0-10 VDC Output Calibration mode: a.

  • Page 85: Example Of 2 Different Solution Selections And The Resulting Compensation

    900 Series Operation Manual – 900OM r03-20 Example of 2 Different Solution Selections and the Resulting Compensation How much error results from treating natural water as if it were KCl at 15°C? A tap water solution should be compensated as 442 with a tempco of 1.68 %/°C, where the KCl value used would be 1.90 %/°C.

  • Page 86: Solution Characteristics

    (anions) in freshwater that the Myron L ® Company calls “Natural Water”. These are modeled in a mixture called “442™” which the Myron L Company markets for use as a calibration ® standard, as it does standard KCl and NaCl solutions.

  • Page 87: Finding The Tempco Of An Unknown Solution

    900 Series Operation Manual – 900OM r03-20 Finding the Tempco of an Unknown Solution You may need to measure compensated conductivity of solutions unlike any of the 3 standard salts. In order to enter a custom fixed tempco for a limited measurement range, enter a specific value through the User Mode function.

  • Page 88: Orp/Oxidation-Reduction Potential/Redox

    Sensor ® The pH sensors for the 900 Series Monitor/Controllers are a single construction in an easily replaceable package. The sensor body holds a large solution supply for long life. The reference junction “wick” is porous to provide a very stable, low permeability interface. It is located under the glass pH sensing electrode.

  • Page 89: Ph And Orp Sensor Cautions

    “Drifting” can be caused by a film on the pH sensor bulb. Isopropyl alcohol may be used to clean the sensor. The sensor bulb is very thin and delicate. Do not scrub or wipe the sensor. Replacement sensors are available only from the Myron L Company or its authorized distributors.

  • Page 90: Relay And Alarm Trigger, Set Point And Hysteresis Functionality

    900 Series Operation Manual – 900OM r03-20 Relay and Alarm Trigger, Set Point and Hysteresis Functionality Trigger options are: • Falling: The relay/alarm triggers if measurement falls Select Trigger Type 7:08 PM below the set point. • Rising: The relay/alarm triggers if measurement rises Falling above the set point.
  • Page 91 900 Series Operation Manual – 900OM r03-20 Adjusting the hysteresis too narrow may cause the status to fluctuate (on-off) due to flow, chemical mixing or bubbles causing the relay to chatter. This condition is to be CAUTION avoided, as it could damage your valves, pumps, etc.… and will eventually damage the relay.

  • Page 92: Maintenance

    900 Series Operation Manual – 900OM r03-20 XIII. MAINTENANCE 900 Series Multi-Parameter Monitor/Controller Base Unit Cleaning the Display • It is recommended to disconnect the unit’s mains power prior to cleaning. • Use a soft dry cloth when cleaning the touchscreen.

  • Page 93: Conductivity, Tds, Resistivity, And Salinity Sensors

    Operating conditions; temperatures and solutions all have an effect on that life. The higher the temperatures and stronger the solutions, the shorter the life. • When not in use or in storage, sensors must be hydrated at all times with Myron L ® Company pH/ORP Sensor Storage S olution.

  • Page 94: Troubleshooting

    “Relay/Alarm Settings Reset”, page 50. Question: Why are the pH and ORP readings incorrect when I hook up a millivolt generator? Answer: The pH/ORP input channel is intended for use with Myron L Company pre-amplified pH and ®...

  • Page 95: System Overview Screen

    900 Series Operation Manual – 900OM r03-20 sensor in pH 7 buffer solution, the sensor needs additional rinsing, the sensor needs to be cleaned, or the pH sensor is defective and needs to be replaced. System Overview Screen The System Overview screen is a temporary version of the All...

  • Page 96: Accessories

    442 Natural Water™, and NaCl standards. All standards are within ±1.0% of reference solutions. These same standard solutions may be used for calibration and recertification of your 900 Series Multi- Parameter Monitor/Controller.

  • Page 97: Ordering Information

    SSG - Gallon 442-30,000 SS2OZ - 2 Ounce. 442-500 442-1000 Customer-specific Standard Solutions are available by special order. Contact the Myron L Company or ® your local distributor for more information. NIST Certification NIST Certificates are available by quote, contact the Myron L ®...

  • Page 98: Alarms

    Remote Alarm Remote Alarm - RA™ IMAGES NOT TO SCALE Description This remotely mounted AUDIBLE and VISUAL alarm connects to any Myron L Company ® Monitor/Controller, or brand “X” controller with dry contacts. When activated by the 900 the Remote Alarm will provide both an audible and a visual alert at a remote location as well as the visual warnings at the monitor/controller.
  • Page 99 900 Series Operation Manual – 900OM r03-20 Order Part # Description Remote Alarm™ Replacement Harness, female connector w/12” 2 conductor wire. For use w/ RA or PA RAW-200 Wire, 200 feet/61 meters for Remote Alarm or Piezo Electric Alarm Specifications Audible Alert —...

  • Page 100: Piezo Electric Alarm

    Connect the monitor/controller end of the extension wires to the 12-inch 2-conductor wire harness with the wire nuts provided — Black to Positive (+) and White to Negative (-). b. Plug the RA connector into the RA #1 or RA #2 connector on the back of the 900 Series Monitor/Controller.

  • Page 101: Connecting To Your Own Alarm

    NOTE: If the alarm does not sound off: Positive ( + ) 1. Check the polarity of the extension wire connections. Replacement Alarm Harnesses are available from the Myron L Company, order part #RAH. *Methode is registered trademark of Methode Electronics, Inc. Page 101...

  • Page 102: Mounting Brackets

    Additional Mounting Hardware Available, Contact the Myron L Company. ® Power Adapter Order Part # Description PWRADAPT 900 Series Power Adapter, Input: 100-240 VAC, Output: 24 VDC, 1.7 A Specifications Input Voltage: 100-240 VAC Output Voltage: 24 VDC Output Current Max: 1.7 A...

  • Page 103: Glossary

    900 Series Operation Manual – 900OM r03-20 XVI. GLOSSARY 442™ An Internationally recognized “natural water” standard developed by the Myron L ® Company in 1964. Algorithm A procedure for solving a mathematical problem. Anions Negatively charged ions Digital Volt Meter...
  • Page 104 900 Series Operation Manual – 900OM r03-20 USP25 United States Pharmaceutical regulation, revision number 25. In part, requires conductivity, TDS, resistivity or pH measurements be taken, recorded and/or systems controlled using equipment without temperature compensation. Requires a separate temperature measuring device (temperature measurements may be part of conductivity, TDS, resistivity or pH device but must not correct measurements for temperature errors).

  • Page 105: Warranty

    A reasonable service charge will be made for diagnosis or repairs due to normal wear, abuse or tampering. Warranty is limited to the repair or replacement of Monitor/Controller only. The Myron L ® Company assumes no other responsibility or liability.
  • Page 106 900 Series Operation Manual – 900OM r03-20 Myron L ® Company 2450 Impala Drive Carlsbad, CA 92010-7226 Tel: +1-760-438-2021 Fax: +1-760-931-9189 E-Mail: info@myronl.com techquestions@myronl.com www.myronl.com Designed, Engineered and Assembled in the USA ACCURACY • RELIABILITY • SIMPLICITY Page 106...

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