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Summary of Contents for IQ IQ150
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Page 2: Two-Point Calibration Quick Reference Guide
MODEL IQ150 pH Meter Getting Started TWO-POINT CALIBRATION--QUICK REFERENCE GUIDE Press ON/OFF to Connect probe to Put probe in first If necessary, press pH until pH icon is meter. calibrating buffer. turn on meter. seen on the display. Press CAL. -
Page 3: Introduction
IF THE SEAL ON THE BACK OF THE METER IS TAMPERED WITH, THE WARRANTY IS IMMEDIATELY VOIDED. The IQ150 pH “Dual Technology” meter accepts both traditional style glass sensor electrodes with BNC connectors as well as non-glass pH probes with ISFET (Ion Sensitive Field Effect Transistor) silicon chip sensors. -
Page 4: Table Of Contents
Table of Contents Two-Point Calibration Quick Reference Guide ..... . . Introduction ........... Techniques and Tips for Best Performance . -
Page 5: Techniques And Tips For Best Performance
DO: Be sure the surface of the sensor in the probe is free from any deposits or films. See the cleaning instructions in this manual. DO: Contact IQ Scientific Instruments if your pH testing involves monitoring small pH changes over time (i.e. titrations). - Page 6 DO NOT: take readings in direct sunlight. Direct sunlight may cause unstable readings or difficulty in calibration. Call IQ Scientific Instruments or your Authorized Dealer for optional light shields. DO NOT: use the probe in an environment that will damage the pH sensor, such as hydrofluoric acid or abrasive samples.
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Page 7: Display Features
Display Features Main Display. Displays pH, mV or Temperature. pH Mode and pH Stabilization Indicator. pH is displayed when the meter is measuring pH. This symbol will flash until a stable reading (endpoint) is reached. mV Mode Indicator. Temperature Mode Indicator. Calibration Mode Indicator. -
Page 8: Keypad Functions
Keypad Functions Turns the meter ON and OFF. When turned off, the meter retains the calibration in memory. Selects 0.01 pH resolution, 0.1 pH resolution and mV mode. TEMP Selects Temperature mode. Repeatedly pressing TEMP toggles between C and Selects the Calibration mode. SELECT Scrolls through calibration buffer values. -
Page 9: Connecting Electrodes
3. BNC Connector for Electrodes. The IQ150 Dual Technology pH meter accepts any pH, ORP, or Ion Selective Electrode with BNC connector. Be sure that both the receptacle on the meter and the connector on the probe are clean and dry;... -
Page 10: Ph Calibration And Measurement
Calibration and Measurement Range The IQ150 can measure from pH 0 to 14. Temperature compensation is automatic from 0 C to + 100 C. The meter can perform a one or two point calibration using any buffer listed below. -
Page 11: Calibration With Two Buffers
• Calibration with Two Buffers Remember: Always use buffers that bracket the sample pH range. (For example, if the sample is about 8.5, use 7.00 and 10.01 buffers). The narrowest calibration range gives the most accurate reading. Remove the protective cap from the probe tip and connect probe to the meter. -
Page 12: Calibration With One Buffer
When the pH buffer value stops flashing, two-point calibration is complete. NOTE: When calibration is complete, the pH reading displayed will be the automatically temperature compensated (ATC) pH value of the buffer. For example, pH 7.00 buffer will be corrected to 7.02 if the buffer is at 20 C, pH 10.01 buffer will be corrected to 10.06 at 20 Rinse probe in deionized water and place in sample. -
Page 13: Automatic Temperature Compensation
Automatic Temperature Compensation Automatic Temperature Compensation (ATC) only occurs when using an ISFET pH probe (built-in temperature sensor) or when a BNC pH electrode is used with the separate temperature plug attached. After calibration is complete and the meter is in the pH mode, the pH values displayed will be temperature compensated. -
Page 14: Manual Temperature Compensation
Manual Temperature Compensation Remember: ISFET probes have a built-in temperature sensor and never require manual temperature compensation. Manual Temperature Compensation of BNC Electrodes Procedure: Connect the BNC jack to the meter. Be sure no temperature probe is attached to the 3.5 mm phono receptacle. Place probe in buffer. -
Page 15: Mv Measurement
mV Measurement Procedure: Connect probe to meter. Press ON/OFF to turn on meter. Press mV to place meter in mV mode. The mV icon will be displayed. The display shows the current mV reading. Automatic Ranging of mV Display From -199.9mV to +199.9mV will display 0.1 resolution. From 200mV to 1999mV meter will display 1 mV resolution. -
Page 16: Cleaning And Reconditioning Isfet Probes
Cleaning and Reconditioning ISFET (non-glass) Probes Cleaning with Detergent Regularly clean the ISFET probe with detergent (a few drops of dish detergent in a cup of warm water). Rinse well with deionized water. ISFET probes can be cleaned with a toothbrush and detergent Reconditioning with Warm Buffer ISFET probes are designed to be stored dry and have a virtually unlimited shelf life;... -
Page 17: Cleaning With Alcohol Or Methanol
Cleaning with Pepsin (Protein Deposit Removal) Digest proteins by soaking for 15 minutes to one hour in Probe Cleaning Solution, available from IQ Scientific Instruments as item #PCS50. Rinse well with deionized water. Soak the probe for at least two hours in pH 4.00... -
Page 18: Cleaning And Reconditioning Bnc Electrodes
Cleaning and Reconditioning BNC (Glass Sensor) Electrodes Check with the electrode product insert provided with your pH electrode for full details on maintaining glass sensor pH electrodes. Cleaning with Detergent Vigorously stir the BNC probe in a solution of warm water and detergent (a few drops of dish detergent in a cup of warm water) for 5 minutes. -
Page 19: Cleaning With Pepsin
CAUTION: This solution is extremely hazardous. Protective clothing and eyewear must be worn. Dispose of used solution properly. Titrations Should you wish to use the IQ150 pH “Dual Technology” meter in a titration application, please contact IQ Scientific Instruments for instructions. -
Page 20: Battery Replacement
AC power, it will not automatically turn off. AC Power Adapter The IQ150 pH meter can be used with an optional AC power adapter. Use only IQ Scientific Instruments AC power adapters. The use of other adapters may cause AC power interference that may result in unstable readings. -
Page 21: Troubleshooting
Troubleshooting INDICATION CAUSE USER ACTION Press ON/OFF key. No Display. Auto Power Off has cleared display. No Power. Replace 9v battery, or use AC power adapter. BATT icon Battery is low. Follow the directions for displayed. battery replacement. PROBE icon Slight ISFET probe The ISFET sensor has flashing. - Page 22 Trouble calibrating. Probe sensor surfaces are Follow cleaning and Display does not stop dirty or probe needs reconditioning instructions. flashing during reconditioning. calibration. Reference junction not Follow warm buffer cleaning flowing. procedure. Buffers may be Recalibrate with fresh contaminated or expired. buffers.
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Page 23: Error Codes
Error Codes DISPLAY CAUSE USER ACTION This error code is displayed Turn the meter off. Disconnect, after the meter is turned on and then reconnect the probe. if any meter malfunction is Turn meter back on. detected. If E01 persists, and the meter is used with the AC power adapter, turn the meter off. - Page 24 BNC electrode slope error. E04 is displayed if the electrode slope is less than 85% of the theoretical maximum of 59.16mV per unit of pH. A slope error indicates poor pH electrode condition. Follow cleaning instructions. IF E04 persists, replace electrode. Override E04 by pressing pH/mV key for temporary use of the electrode.
- Page 25 For Technical Support On-line: techsupport@phmeters.com www.phmeters.com IQ Scientific Instruments, Inc. 2075-E Corte del Nogal Carlsbad, CA 92009 US & Canada -- (800) 276-0723 Telephone (760) 930-6501 Fax (760) 930-0615 Revision 6.0 © 1998-2004 IQ Scientific Instruments, Inc.
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