Myron L AR1 User Manual
TechPro
™
Operation
Manual
Model AR1
MYRON L
COMPANY
10-02 (WEB-EG)
Instrument Illustration
CONDUCTIVITY
METER
Conductivity Cell
(Built-in
Electrodes)
Temperature
Sensor
User selectable
temperature
compensation
ratios (Solution
Selection)
KCl
NaCl
442
Icons for either
Conductivity or
Total Dissolved
Solids (TDS)
CONDUCTIVITY
LO BATT
COND
TDS
Units of Measurement
mS - millisiemens/cm
(millimhos/cm)
mS
µS
PPM
PPT
°C
TDSCOND
µS - microsiemens/cm
(micromhos/cm)
PPM - parts per million
PPT - parts per thousand
Parameter
Conductivity
Conductivity
TDS
TDS
Measurement key:
User selectable for either
Conductivity or TDS
(Switch Selectable)
AR1
MYRON L
COMPANY
For detailed explanations, see Table of Contents
Wrist/neck strap slot
(user supplied)
1-12-99
1
FEATURES and SPECIFICATIONS
A. Features
• Superior resolution 3 1/2 digit LCD
• Accuracy of ±1% of full scale
• All electrodes are internal for maximum protection
• Latest electrode cell technology
• Water resistant
• Autoranging Conductivity/TDS
• Easy calibration
• User selectable Conductivity/TDS modes
• 3 “User Selectable” solution conversions (tempcos)
• Temperature Accuracy of ±1° C/F
B. General Specifications
Display 3 1/2 Digit LCD
Dimensions (LxWxH) 7.7x2.7x2.5 in.
196x68x64 mm
Weight 10.1oz./290g
Case Material ABS
Cond/TDS Cell Material ABS
Cond/TDS Cell Capacity 0.2 oz./5 ml
Power 9V Alkaline Battery
Battery Life >100 Hours/5000 Readings
Operating/Storage Temperature 32-132°F/0-55°C
Protection Ratings IP64/NEMA 3
D. Warranty/Service
The Myron L AR1 has a limited two year warranty. If an instrument fails to
operate properly, see Troubleshooting Chart, pg. 13. The battery is userreplaceable. For other service, return the instrument prepaid to the
Myron L Company.
MYRON L COMPANY
2450 Impala Drive
Carlsbad, CA 92010
USA
760-438-2021
If, in the opinion of the factory, failure was due to materials or
workmanship, repair or replacement will be made without charge. A
reasonable service charge will be made for diagnosis or repairs due to
normal wear, abuse or tampering. This warranty is limited to the repair or
replacement of the AR1 only. The Myron L Company assumes no other
responsibility or liability.
E. TechPro™ Series Models
TechPro Series Models pH1 AR1 ARH1
Parameters pH Conductivity or TDS, Conductivity or TDS,
& Temperature & Temperature pH & Temperature
C.Specification Chart
Additional information available on our web site at:
www.myronl.com
AR1 Conductivity TD S Temperature
Ranges 0-1999 µS 0-1999 ppm 0-71° C
2-19.99 mS 2-19.99 ppt 32 - 160° F
in 3 autoranges in 3 autoranges
Resolution 0.1 (<200 µS) 0.1 (<200 ppm) 0.1° C/F
1 (<2000 µS) 1 (<2000 ppm)
0.01 (>2 mS) 0.01 (>2 ppt)
Accuracy ±1% of Full Scale ±1.0° C/F
Auto Temperature 0-71° C
Compensation 32 - 160° F
Conductivity or KCl, NaCl or 442™
TDS Ratios
2 3
TABLE OF CONTENTS
Instrument Illustration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
FEATURES and SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . 2
A. Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
B. General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 2
C. Specification Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
D. Warranty/Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
E. TechPro Series Models . . . . . . . . . . . . . . . . . . . . . . . . .3
I. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
II . RULES of OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
A. Operation in a Nutshell. . . . . . . . . . . . . . . . . . . . . . . . . . 6
B. Characteristics of the Keys . . . . . . . . . . . . . . . . . . . . . . 6
C. Operation of the Keys . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1. Measurement Keys in General . . . . . . . . . . . . 6
2. COND/TDS Key . . . . . . . . . . . . . . . . . . . . . . . . .7
III. AFTER USING the AR1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
IV. THE SPECIFIC RECOMMENDED MEASURING
PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
IX. CARE and MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
A. Temperature Extremes . . . . . . . . . . . . . . . . . . . . . . . . 12
B. Battery Replacement (LO BATT) . . . . . . . . . . . . . . . . 12
C. Cleaning Cell Cup . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
X. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
XI. ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
A. Conductivity/TDS Standard Solutions . . . . . . . . . . . 14
B. Soft Protective Case . . . . . . . . . . . . . . . . . . . . . . . . . . 14
C. pH Buffer Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
XII. TEMPERATURE COMPENSATION . . . . . . . . . . . . . . . . . . . . . . . 15
A. Standardized to 25°C . . . . . . . . . . . . . . . . . . . . . . . . . .15
B. Tempco Variation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
C. An Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
D. A Chart of Comparative Error . . . . . . . . . . . . . . . . . . . .16
E. Other Solutions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
XIII. CONDUCTIVITY CONVERSION to TOTAL DISSOLVED SOLIDS
(TDS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
A. How it’s Done . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
B. Solution Characteristics . . . . . . . . . . . . . . . . . . . . . . . .17
C. When does it make a lot of difference? . . . . . . . . . . . 18
V. SOLUTION SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
A. Why Solution Selection is Available . . . . . . . . . . . . . . .8
B. The 3 Solution Types . . . . . . . . . . . . . . . . . . . . . . . . . . .8
C. Procedure to Select a Solution . . . . . . . . . . . . . . . . . . 8
D. Procedure to Select the Units of Measurement . . . . .9
VI. CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
A. Calibration Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
B. Rules for Calibration in the AR1. . . . . . . . . . . . . . . . . . .9
1. Calibration Steps . . . . . . . . . . . . . . . . . . . . . . . .9
2. Calibration Limits . . . . . . . . . . . . . . . . . . . . . . . .9
C. Calibration Procedures. . . . . . . . . . . . . . . . . . . . . . . . .10
VII. CALIBRATION INTERVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
A. Suggested Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . .10
B. Calibration Tracking Records . . . . . . . . . . . . . . . . . . . 10
C. Conductivity or TDS Practices . . . . . . . . . . . . . . . . . . 11
VIII. CHANGING from CENTIGRADE to FAHRENHEIT. . . . . . . . . . . . 11
4 5
XIV. TEMPERATURE COMPENSATION (Tempco)
and TDS DERIVATION. . . . . . . . . . . . . . . . . . . . . . . . . . . .18
XV. GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 21
Loading...