Myron L Ultrameter 6P Operation Manual

Ultrameter
Operation
Manual
Model 6P
9-00
7-11-00
Reference Junction under Glass pH Bulb
MS
MR
pH
6P
ORP
COND
RES TDS
These 5 Measurement keys will:
• Turn instrument on.
• Measure parameter.
• Exit any function.
(Built-in Electrodes)
Preprogrammed variable conductivity/ TDS ratios
Parameters (5)
Wrist/neck strap slot (user supplied)
pH/ORP Sensor Protective Cap
This key for:
• Calibration
• Memory Clear
• Solution Selection
• Confirmation
Up key/Memory Store
Down key/Memory Recall
Conductivity Cell
USER mode for programming special temperature compensation factor and conductivity/TDS ratio
Displayed here:
• Temperature readout
• USER temperature compensation or conductivity/TDS ratio
• Memory Storage/ Recall
• pH Calibration
ORP Electrode
pH Glass Electrode
pH/ORP Sensor (Replaceable)
PPM PPT mV
µS
mS
K
M
BUFFER
°C
RATIO
% /
KCl 442
NaCl User
ORP RES TDSpHCOND
LOBATT CAL MEMORY
For detailed explanations see Table of Contents
Instrument Illustration
Units of Measurement
Megohms - cm
Kilohms - cm mS - millisiemens/cm (millimhos/cm) µS - microsiemens/cm (micromhos/cm) PPM - parts per million PPT - parts per thousand
Parameter Resistivity Resistivity
Conductivity Conductivity
TDS TDS
Temperature Sensor
MMYYRROONN LL
CCOOMMPPAANNYY
MCLR
CAL
1
ULTRAMETER
TM
FEATURES and SPECIFICATIONS
A. Features:
• Superior resolution 4 digit LCD displays full 9999 µS/ppm.
• Accuracy of ± 1% of reading (not merely full scale).
• All electrodes are internal for maximum protection.
• Latest 4 electrode cell technology.
• Waterproof to 3 feet/1 meter.
• Autoranging conductivity/TDS/resistivity.
• Prompts for easy pH calibration.
• Memory saves 20 readings.
• Factory calibrations stored in microprocessor.
• 3 conductivity/TDS solution conversions preprogrammed into microprocessor.
• USER feature allows: Programming your own cond/TDS conversion factor. Programming your own temperature compensation factor. Disabling temperature compensation.
B. General Specifications
Display 4 Digit LCD Dimensions (LxWxH) 7.7x2.7x2.5 in.
196x68x64 mm Weight 13.5oz./383g Case Material VALOX* Cond/Res/TDS Cell Material VALOX* Cond/Res/TDS Cell Capacity 0.2 oz./5 ml pH/ORP Sensor Well Capacity 0.04 oz./1.2 ml Power 9V Alkaline Battery Battery Life >100 Hours/5000 Readings Operating/Storage Temperature 32-132°F/0-55°C Protection Ratings IP67/NEMA 6 (waterproof to
3 feet/1 meter)
* ™ GE Corp.
Additional information available on our web site at:
www.myronl.com
2
a. While in “USER” mode, press . b. Press twice (to skip over tempco adjustment), and
RATIO” will appear (see Figure 4).
c. Adjust with or
keys until new conversion ratio is displayed.
d. Press twice (to skip
over calibration adjustment) to accept new conversion ratio. Y ou are now ready to measure samples with the new conductivity/TDS ratio.
VI. CALIBRATION
A. Calibration Intervals Generally, calibration is recommended about once per month with Conductivity or TDS solutions. Calibration with pH solutions should be checked twice a month. Calibration of ORP is not necessary (ref. Calibration Intervals, pg. 23).
B. Rules for Calibration in the Ultrameter
1. Calibration Steps a. Starting Calibration
Calibration is begun by pressing while measuring Conductivity, TDS or pH. Measuring continues, but the CAL icon is on, indicating
calibration is now changeable. The reading is changed with the and to match the known value. The calibration for each of the 4 solution types may be performed
from either conductivity or TDS mode. 14
CAL
MCLR
MS
MR
In these first five sections, you have learned all you need to make accurate measurements. The following sections contain calibration, advanced operations and technical information.
MS
MR
CAL
MCLR
CAL
MCLR
TDS
Figure 4
TDS
RATIO
User
for ORP are highly reactive and potentially hazardous, your Ultrameter has an electronic ORP calibration. This causes the zero point on the reference electrode to be set whenever pH 7 calibration is done.
7. Temperature Calibration
Temperature calibration is not necessary in the Ultrameter.
VII. MEMORY
This feature allows up to 20 readings with their temperatures to be stored simultaneously for later recall.
A. Memory Storage
1. While displaying a measurement, press to record the displayed value.
2. MEMORY” will appear and the temperature display will be momentarily replaced by a number (1-20) showing the position of the record. Figure 9 shows a reading of 1806 µS stored in memory record #4.
B. Memory Recall
1. Press one of the five measurement keys.
2. Press , “MEMORY” will appear, and the display will show the last record stored.
3. Press the or to scroll to the record location desired (the temperature display alternates between temperature
recorded and location number).
4. Press any measurement key to leave memory recall or allow to automatically turn off.
C. Clearing a Record/Memory Clear After recalling a certain record location, press to clear that
memory. This space will be the place for the next memory record, unless you scroll to another position before ending the recall sequence. The next memory stored will go into the next highest
available memory location.
Example: You have locations 1-7 filled. You want to
clear the conductivity
reading stored in record location #3 and replace it with a pH reading.
1. Press and scroll to location #3 .
2. Press to clear old record #3 .
3. Fill pH/ORP sensor well with sample.
4. Press to measure sample and press to store reading in location #3.
5. The next memory stored will go into location #8.
6. To clear all records: After pressing , scroll down
to “CLr ALL” in measurement
and temperature area (see Figure 10).
7. Press . All records will be cleared.
VIII. CHANGING from CENTIGRADE to FAHRENHEIT
1. Press .
2. Press to display the stored memory records.
3. Press repeatedly until you pass the memory “CLr ALL
location. The display will show a “C” or “F” (see Figures 11 & 12).
20 21
MR
COND
MR
CAL
MCLR
pH
Figure 10
MR
MS
MR
CAL
MCLR
CAL
MCLR
MR
MS
MR
MS
Figure 9
COND
µS
°C
MEMORY
442
MEMORY
XII. TROUBLESHOOTING CHART
27
Symptom Possible Cause Corrective Action No display, even though Battery weak or not connected. Check connections or replace battery
measurement key pressed (ref. Battery Replacement, pg. 24). Inaccurate pH readings 1. pH calibration needed (ref. pH Cal., pg. 17). 1. Recalibrate instrument.
2. Cross-contamination from residual pH 2. Thoroughly rinse sensor well.
buffers or samples in sensor well. 3. Recalibrate using fresh buffers (ref. pH
3. Calibration with expired pH buffers. Buffer Solutions, pg. 28).
No response to pH changes Sensor bulb is cracked or an Replace pH/ORP sensor (ref. pH/ORP
electromechanical short caused by an Sensor Replacement, pg. 29). internal crack.
Will not adjust down to pH 7 pH/ORP sensor has lost KCl. Clean and rejuvenate sensor (ref. Cleaning
Sensors, pg. 25) and recalibrate. If no improvement, replace pH/ORP sensor (ref. pH/ORP Sensor Replacement, pg. 29).
pH readings drift or respond 1. Temporary condition due to “memory” Clean and rejuvenate sensor (ref. Cleaning slowly to changes in of solution in pH sensor well for long Sensors, pg. 25) and recalibrate. If no buffers/samples or “FAC” is periods. improvement, replace pH/ORP sensor displayed repeatedly 2. Bulb dirty or dried out. (ref. pH/ORP Sensor Replacement, pg. 29).
3. Reference junction clogged or coated.
Unstable 1. Dirty electrodes. 1. Clean cell cup and electrodes (ref.
Conductivity/TDS/ 2. Test samples greater than 1 megohm. Cleaning Sensors, pg. 25). Resistivity readings 2. Minimize test sample exposure to air
(ref. Measuring Resistivity, pg. 10).
Unable to calibrate Film or deposits on electrodes. Clean cell cup and electrodes (ref.
Conductivity/TDS Cleaning Sensors, pg. 25). Resistivity readings much 1. Contamination from previous sample or 1. Rinse cell cup more thoroughly before
lower than expected from pH sensor well. measurement. Ensure pH cap is snugly
2. Carbon dioxide in test sample. in place.
2. See Measuring Resistivity, pg. 10.
Ultrameter
Operation
Manual
Addendum
Models 4P & 6P
Software Versions 2.03, 2.10, 2.51 & Later*
* See page 5 to determine the version of software of your Ultrameter™.
UMMA10-01
WEB
Cell Check For Instruments with Software Version 2.10 & Later. In these versions, a Cell Check feature has been added to further increase the performance of your instrument. This is especially important when in RES mode reading High Resistivity or Ultrapure waters. This feature, utilizing technological improvements, knows when the Conductivity Cell cup is dirty and calls it to your attention. You may then choose to clean the Conductivity Cell cup or ignore it by pressing the CAL key. Follow the steps below to perform a Cell Check.
1. Press key to power up the unit.
2. Verify that the cell cup is empty of any solution and "- - - -" is displayed by the Ultrameter. If a reading other than "- - - -" is displayed, clean the cell cup and repeat steps 1 & 2. See "Cleaning Sensors".
3. Press the key until "CELL ch" appears. Fig. 2.
4. Press the key. If the cell is clean, “Good” will
momentarily be displayed. Fig. 3.
5. If the Cell Check has failed the display will show “CELL cLn”, Fig. 4, alternating with a number such as “53”, Fig. 5, indicating a relative amount of contamination or dirt in the Conductivity Cell. To insure the highest quality readings, the Conductivity Cell cup should be cleaned before measuring High Resistivity solutions. Rinse the cup with DI water several times to clean,
and Shake instrument well to
remove excess water. Repeat steps 1-4.
2
Figure 2
Figure 4
Figure 5
Figure 3
CAL
MCLR
MR
RES
I. ENHANCED HIGH RESISTIVITY MEASUREMENTS
The resistivity calculations in the Ultrameter have been improved for measuring waters greater than 10 Megohms. When the Ultrameter is in one of the solution modes (i.e. KCl, NaCl or 442) and the resistivity reading is greater than 10 Megohms, the Ultrameter performs automatic temperature compensation for high purity water. As such, the maximum possible value that should be displayed for water is 18.2. It may be possible to display readings higher than 18.2 if the instrument is not calibrated or if solutions other than water are being measured. To insure proper use of the instrument in this mode, readings greater than 20 Megohms will display "- - - -" indicating an over-range condition. To obtain resistivity readings for solutions other than water, the User mode should be selected. In User mode the Ultrameter will display resistivity measurements up to 30 Megohms. An Offset Zero Calibration feature was added to software version
2.03, and must be performed by the user, see below. On all later versions this function is performed at time of manufacture. A Cell Check feature was added to these later versions. See page 2.
Offset Zero Calibration For Instruments with Software Version 2.03 When performing measurements of waters
above 10 Megohms, the
accuracy of the Ultrameter may be improved by performing an offset zero calibration. Follow the steps below to perform an offset zero calibration.
1. Press key to power up the unit.
2. Verify that the cell cup is empty of any solution and "- - - -" is displayed by the Ultrameter. If a reading other than "- - - -" is displayed, clean the cell cup and repeat steps 1 & 2. See "Cleaning Sensors".
3. Press the key until "CAL0" appears. Fig. 1.
4. Press the key. The instrument should momentarily
display a number of counts, and return to Resistivity mode.
5. If the calibration has failed the display will show "Err". If an error occurs during this step, the cell cup is probably contaminated. Rinse the cup with DI water several times to clean and Repeat steps 1-4.
RES
CAL
MCLR
MR
Figure 1
1
4. Press the key until "User" is the only solution icon being displayed.
5. Press the key.
6. The User mode calibration "Link" has now been canceled.
NOTES:
1. To maintain repeatability, use the same standard solutions for future
calibrations.
2. Calibration of the Ultrameter Gain Factor for User mode is not available
when the calibration link has been established. The other calibration functions (i.e. Temperature Compensation %/C settings and TDS Ratio settings) are still intact. To perform a calibration of the User mode as described in the manual, the User Mode Link should be canceled. See above Canceling User Mode calibration "Link".
3. Once a "link" has been established for User mode, the "link" will apply
to all measurement modes using User solution selection (i.e. TDS/User, Cond/User or Res/User).
* YOUR INSTRUMENTS SOFTWARE VERSIONCHECKING
1. Press key to power up the unit.
2. Press the key until three numbers are displayed as shown. in Fig. 9. If one of the listed
versions is displayed, the ENHANCED HIGH RESISTIVITY MEASUREMENTS, and the USER MODE CALIBRATION LINK are available.
3. Press key , instrument will time out in ~15 seconds.
If one of the listed versions is NOT displayed, and these functions are required, contact the Myron L Company for information on upgrading your instrument.
5
MR
CAL
MCLR
COND
MR
COND
Figure 9
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