Milwaukee MW150 Instruction Manual
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Milwaukee MW150 Instruction Manual

Ph / orp / temperature bench meters
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INSTRUCTION MANUAL
MW150 & MW151 MAX
pH / ORP / Temperature
Bench Meters
pH
CAL
4.01
ATC
ºC
7.01
10.01
SATISFACTION
GUARANTEED

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Summary of Contents for Milwaukee MW150

  • Page 1 INSTRUCTION MANUAL MW150 & MW151 MAX pH / ORP / Temperature Bench Meters 4.01 ºC 7.01 10.01 SATISFACTION GUARANTEED...
  • Page 2 This instruction manual will provide you the necessary information for correct use of the meters. All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Milwaukee Instruments Inc., Rocky Mount, NC 27804 USA.

  • Page 3: Table Of Contents

    8.3. MEASUREMENT ..............................30 8.4. WARNINGS & MESSAGES..........................31 9. ORP .....................................35 9.1. PREPARATION ..............................35 9.2. MEASUREMENT ..............................35 10. MEMORY FUNCTIONS (MW150) ........................36 11. LOGGING (MW151) ..............................37 11.1. TYPES OF LOGGING ............................37 11.2. DATA MANAGEMENT ............................39 12. GLP ....................................46 13. TROUBLESHOOTING ..............................48 14.

  • Page 4: Preliminary Examination

    4 MW150 & MW151 Bench Meters 1. PRELIMINARY EXAMINATION Each bench meter is delivered in a cardboard box and is supplied with: y MA917B/1 Double junction refillable pH electrode y MA831R Stainless steel temperature probe y M10004 pH 4.01 buffer solution (sachet) y M10007 pH 7.01 buffer solution (sachet)

  • Page 5: Instrument Overview 5

    INSTRUMENT OVERVIEW 5 2. INSTRUMENT OVERVIEW MW150 and MW151 pH / ORP / Temperature bench meters perform accurate measurements and present a series of new diagnostic features for improved reliability. y Alphanumeric LCD for intuitive information display y Built-in rechargeable battery with an 8-hour capacity...

  • Page 6: Specifications

    6 MW150 & MW151 Bench Meters 3. SPECIFICATIONS MW150 MW151 –2.00 to 20.00 pH –2.00 to 20.00 pH –2.000 to 20.000 pH Range * ±2000.0 mV ±2000.0 mV Temp. –20.0 to 120.0 °C (-4.0 to 248.0 °F) –20.0 to 120.0 °C (-4.0 to 248.0 °F) 0.01 pH...
  • Page 7 SPECIFICATIONS 7 PROBE SPECIFICATIONS pH range 0 to 14 pH Temperature range 0 to 70 °C (32 to 158 °F) Operating temperature 20 to 40 °C (68 to 104 °F) Reference electrolyte KCl 3.5M Reference junction Ceramic, single pH electrode Reference type Double, Ag/AgCl MA917B/1...

  • Page 8: Functional & Display Description

    8 MW150 & MW151 Bench Meters 4. FUNCTIONAL & DISPLAY DESCRIPTION Front Panel MW150 4.01 ºC 7.01 10.01 pH/ORP/Temp Meter 1. Liquid Crystal Display (LCD) 2. ESC key, to exit current mode 3. MR key, to recall the stored value from memory 4.
  • Page 9 FUNCTIONAL & DISPLAY DESCRIPTION 9 Front Panel MW151 4.01 ºC 7.01 10.01 pH/ORP/Temp Meter 1. Liquid Crystal Display (LCD) 2. ESC key, to exit current mode 3. RCL key, to recall the logged values 4. SETUP key, to enter setup mode 5.
  • Page 10 10 MW150 & MW151 Bench Meters Rear Panel MW150 Ref. Temp. pH/ORP 1. Power supply socket 2. Reference electrode socket 3. Temperature probe socket 4. BNC electrode connector...
  • Page 11 FUNCTIONAL & DISPLAY DESCRIPTION 11 Rear Panel MW151 Ref. Temp. pH/ORP 1. Power supply socket 2. Reference electrode socket 3. Temperature probe socket 4. BNC electrode connector 5. USB port 6. Micro-USB port...
  • Page 12 12 MW150 & MW151 Bench Meters Display Description MW150 pHmV AUTO DATE HOLD SLOPE CLEAR OPEN 1.68 NO MTC ATC 4.01 6.86 ºC 7.01 9.18 ºF 10.01 12.45 ACCEPT TIME 1. DATE tag 2. CLEAR message/calibration/memory 3. OPEN is displayed when the electrode cap has to be removed.
  • Page 13 FUNCTIONAL & DISPLAY DESCRIPTION 13 Display Description MW151 pHmV AUTO DATE HOLD SLOPE CLEAR OPEN 1.68 NO MTC ATC 4.01 6.86 ºC 7.01 9.18 ºF 10.01 12.45 CUST1 CUST2 ACCEPT TIME 1. DATE tag 2. CLEAR message/calibration/memory 3. USB connections status 4.

  • Page 14: Probe Description

    14 MW150 & MW151 Bench Meters 5. PROBE DESCRIPTION MA917B/1 for pH measurement. y Double junction design, reduces risk of clogging with the reference cell physically separated from the intermediate electrolyte. y Refillable, with MA9011 3.5M KCl. This solution is silver free. Silver can cause silver precipitate to form at the junction resulting in clogging.
  • Page 15 PROBE DESCRIPTION 15 MA831R for temperature measurement and automatic temperature compensation (ATC). y Made of stainless steel for corrosion resistance y Used in conjunction with the pH electrode to utilize the instrument’s ATC capability 1. Cable 2. Handle 3. Stainless steel tube...

  • Page 16: General Operations

    6. GENERAL OPERATIONS 6.1. POWER CONNECTION & BATTERY MANAGEMENT MW150 and MW151 can be powered from the supplied 12 VDC adapter, through a PC USB port or standard 5V USB charger (MW151 only) or from the built-in rechargeable battery. The built-in rechargeable battery provides about 8 hours of continuous use. Fully charge the battery before first use.

  • Page 17: Connecting The Probes

    GENERAL OPERATIONS 17 y Position the meter with the display facing up. y Take the electrode holder (7) and insert it into the pin (5). The pin securely holds the electrode holder in place. y For increased arm rigidity, tighten the metal knobs (8) on both sides. 6.3.

  • Page 18: Electrode Care & Maintenance

    18 MW150 & MW151 Bench Meters 6.4. ELECTRODE CARE & MAINTENANCE Calibrating & Conditioning Maintaining a pH electrode is critical to ensure proper and reliable measurements. Frequent 2- or 3-point calibrations are recommended to ensure accurate and repeatable results. Prior to using the electrode for the first time 1.
  • Page 19 The slope percentage is referenced to the ideal slope value at 25 °C. Milwaukee Instruments recommends that the offset does not exceed ±30 mV and that the slope percentage is between 85-105%.

  • Page 20: Setup

    20 MW150 & MW151 Bench Meters 7. SETUP To configure the meter settings, modify default values or set measurement parameters: y Press SETUP to enter (or exit) Setup mode. y Use  keys to navigate the menus (view parameters). y Press CAL/EDIT to enter Edit mode (modify parameters).
  • Page 21 SETUP 21 Out of Calibration Range Warning Options: On (default) or Off (disabled) Use  keys to select. pHmV AUTO DATE HOLD SLOPE CLEAR OPEN 1.68 4.01 NO MTC ATC 6.86 ºC 7.01 9.18 ºF 10.01 12.45 CUST1 CUST2 ACCEPT TIME Date Options: year, month or day...
  • Page 22 22 MW150 & MW151 Bench Meters Auto Off Options: 5, 10 (default), 30, 60 minutes or off Use  keys to select the time. The meter will power off after set period of time. pHmV pHmV AUTO AUTO DATE DATE...
  • Page 23 SETUP 23 LCD Contrast Options: 1 to 9 (default) Use  keys to set LCD contrast values. pHmV AUTO DATE HOLD SLOPE CLEAR OPEN 1.68 4.01 NO MTC ATC 6.86 ºC 7.01 9.18 ºF 10.01 12.45 CUST1 CUST2 ACCEPT TIME Default Values Resets meter settings to factory defaults.

  • Page 24: Mw151 Specific Setup

    24 MW150 & MW151 Bench Meters Meter ID / Serial Number Use  keys to assign a meter ID from 0000 to 9999. Press RANGE/ to view the serial number. pHmV pHmV AUTO AUTO DATE DATE HOLD HOLD SLOPE SLOPE...
  • Page 25 SETUP 25 Use  keys to set time interval: 5 (default), 10, 30 sec. or 1, 2, 5, 15, 30, 60, 120, 180 min. Use  keys to select stability type: fast (default), medium or accurate. First Custom Buffer Press RANGE/ to set a default buffer value as starting value. Use ...
  • Page 26 26 MW150 & MW151 Bench Meters pH Resolution Options: 0.01 (default) and 0.001 Use  keys to select. pHmV AUTO DATE HOLD SLOPE CLEAR OPEN 1.68 4.01 NO MTC ATC 6.86 ºC 7.01 9.18 ºF 10.01 12.45 CUST1 CUST2 ACCEPT...

  • Page 27: Preparation

    8. pH 8.1. PREPARATION MW150: Up to 3-point calibration using 7 standard buffers. MW151: Up to 5-point calibration using 7 standard buffers and 2 custom buffers (CUST1 and CUST2). 1. Prepare two clean beakers. One beaker is for rinsing and one for calibration.
  • Page 28 28 MW150 & MW151 Bench Meters 3. After the first calibration point has been confirmed, the calibrated value is displayed on the first LCD line and the second expected buffer value on the third LCD line (i.e. pH 4.01). The value of the first buffer is set while the second expected buffer value is displayed blinking on the screen.
  • Page 29 y Use the  keys to modify the value based on the temperature reading. The buffer value is updated after 5 seconds. pHmV pHmV AUTO AUTO DATE DATE HOLD HOLD SLOPE SLOPE CLEAR CLEAR OPEN OPEN 1.68 1.68 4.01 NO MTC 4.01 NO MTC 6.86...

  • Page 30: Measurement

    30 MW150 & MW151 Bench Meters 8.3. MEASUREMENT Remove the probe protective cap and place the tip approximately 4 cm (1 ½”) into the sample. It is recommended to wait for the sample and the pH probe to reach the same temperature.

  • Page 31: Warnings & Messages

    Note: The temperature value used for MTC can be set only when “NO T. PROBE” message is displayed. 8.4. WARNINGS & MESSAGES The Calibration Check feature flags diagnostic messages during a calibration. As electrode aging is usually a slow process, differences between previous calibrations are likely due to a temporary problem with the probe or buffers.
  • Page 32 32 MW150 & MW151 Bench Meters y “CLEAN ELEC” indicates poor electrode performance (the offset is out of the accepted window, or the slope is under the accepted lower limit). Clean the probe to improve response time. See ELECTRODE CARE & MAINTENANCE for details. Repeat calibration after cleaning.
  • Page 33 y “WRONG STANDARD TEMPERATURE” is displayed when buffer temperature is out of range. The calibration buffers are affected by temperature changes. During calibration, the instrument will automatically calibrate to the pH value corresponding to the measured temperature but compensate it to the value of 25 °C. y “CONTAMINATED BUFFER”...
  • Page 34 34 MW150 & MW151 Bench Meters Messages Displayed During Measurement y “OUT CAL RNG” is displayed when the measured value is outside calibration range. The option has to be enabled (see Out of Calibration Range in SETUP section). y “OUT OF SPEC” message is displayed when measured parameter and / or temperature...

  • Page 35: Orp 35

    ORP 35 9. ORP Connect an ORP electrode to the instrument and turn it on (see ACCESSORIES section). 9.1. PREPARATION For accurate ORP measurements, the surface of the electrode must be clean and smooth. Pretreatment solutions are available to condition the electrode and improve its response time (see ACCESSORIES section).

  • Page 36: Memory Functions (Mw150)

    36 MW150 & MW151 Bench Meters 10. MEMORY FUNCTIONS (MW150) MW150 can store one measured value (pH/ORP and temperature) with current calibration. The stored value can be recalled or deleted. Memory Store y Press MEM/CLEAR in measurement mode. LCD displays “MEMORY”. The instrument saves the currently measured value with calibration data and returns to measurement mode.

  • Page 37: Logging (Mw151)

    LOGGING (MW151) 37 11. LOGGING (MW151) MW151 supports three types of logging: manual log on demand, log on stability and interval logging. See Log Type in MW151 SPECIFIC SETUP section. The meter can hold up to 1000 log records. Up to 200 for manual log on demand, up to 200 for log on stability and up to 1000 for interval logging.
  • Page 38 38 MW150 & MW151 Bench Meters Manual Log on Demand 1. From the Setup mode, set Log Type to MANUAL. 2. From the measurement screen press LOG/CLEAR. LCD displays “PLEASE WAIT”. The LOG ### “SAVED” screen displays stored log number. “FREE” ### screen displays the number of available records.

  • Page 39: Data Management

    LOGGING (MW151) 39 Interval Logging Warnings “OUT OF SPEC” Measurement is out of specified range. Log continues. “MAX LOTS” Maximum number of lots reached (100). Cannot create new lots. “LOG FULL” Log space is full (1000 logs limit was reached). Logging stops. 11.2.
  • Page 40 40 MW150 & MW151 Bench Meters 2. Press GLP/ACCEPT to confirm. 3. Use  keys to select the lot type (MANUAL, STABILITY or INTERVAL ###). Note: Press RANGE/ to export only the selected lot to external storage. 4. Press GLP/ACCEPT to confirm.
  • Page 41 LOGGING (MW151) 41 5. Press GLP/ACCEPT to confirm (to exit, press ESC or CAL/EDIT or LOG/CLEAR). “PLEASE WAIT” with ACCEPT tag blinking is displayed, until the lot is deleted. After the selected lot has been deleted, “CLEAR DONE” displays briefly. Display shows “NO MANUAL / LOGS”...
  • Page 42 42 MW150 & MW151 Bench Meters Log on Interval 1. Press RCL to access the logged data. LCD displays “PLEASE WAIT” followed by “LOG RECALL” with ACCEPT tag blinking and the total number of logs. 2. Press GLP/ACCEPT to confirm.
  • Page 43 LOGGING (MW151) 43 11.2.3. Exporting Data PC Export 1. With the meter on, use the supplied micro USB cable to connect to a PC. 2. Press SETUP then CAL/EDIT. 3. Use the  keys and select “EXPORT TO PC”. The meter is detected as a removable drive. LCD displays the PC icon. 4.
  • Page 44 44 MW150 & MW151 Bench Meters USB Export All 1. With the meter on, insert a USB flash drive into the micro USB port. If the flash drive does not have a micro USB connector, use an adapter. 2. Press RCL then RANGE/ to select the “EXPORT ALL” option.
  • Page 45 LOGGING (MW151) 45 4. With the lot selected, press RANGE/ to export to USB flash drive. LCD displays “PLEASE WAIT” followed by “EXPORTING” with ACCEPT tag and selected lot name (MAN / STAB / ###) blinking. LCD displays “EXPORTING” and the percentage counter, followed by “DONE” when export is completed.

  • Page 46: Glp

    46 MW150 & MW151 Bench Meters 12. GLP Good Laboratory Practice (GLP) allows the user to store and recall calibration data. Correlating readings with specific calibrations ensures uniformity and consistency. Calibration data is stored automatically after a successful calibration. y Press GLP/ACCEPT to view GLP data.
  • Page 47 GLP 47 y “EXP WARN DIS” displays if Calibration Expired Warning is disabled. 4.01 7.01 10.01 y "NO CAL" and CAL tag blinking displays if the instrument has not been calibrated.

  • Page 48: Troubleshooting

    48 MW150 & MW151 Bench Meters 13. TROUBLESHOOTING SYMPTOMS PROBLEM SOLUTION Soak the electrode tip in MA9016 Slow response / Dirty pH electrode excessive drift cleaning solution for 30 minutes, then follow the Cleaning procedure Reading fluctuates Clogged/Dirty junction. Clean the electrode.

  • Page 49: Accessories

    ACCESSORIES 49 14. ACCESSORIES MA917B/1 Combination pH electrode, glass body, refillable MA924B/1 ORP probe, glass body, refillable SE-300 Double junction ORP platinum probe MA831R Stainless steel temperature probe MA9001 pH 1.68 buffer solution (230 mL) MA9004 pH 4.01 buffer solution (230 mL) MA9006 pH 6.86 buffer solution (230 mL) MA9007...

  • Page 50: Certification

    If service is required, contact your local Milwaukee Instruments Technical Service. If the repair is not covered by the warranty, you will be notified of the charges incurred. When shipping any meter, make sure it is properly packaged for complete protection.
  • Page 51 WARRANTY 51 Milwaukee Instruments reserves the right to make improvements in design, construction and appearance of its products without advance notice.
  • Page 52 THANK YOU FOR CHOOSING Sales and Technical Service Contacts: Milwaukee Electronics Kft. Alsó-kikötő sor 11C H-6726 Szeged - HUNGARY tel: +36 62 428 050 fax: +36 62 428 051 www.milwaukeeinst.com e-mail: sales@milwaukeeinst.com Milwaukee Instruments, Inc. 2950 Business Park Drive Rocky Mount, NC 27804 USA...

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