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Summary of Contents for HM Digital HydroMaster HM-500
- Page 1 HydroMaster USER’S GUIDE HM-500...
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Page 2: Table Of Contents
TABLE OF CONTENTS 1. INTRODUCTION ...................................... A. Overview ..................B. What’s Included ................. C. Housing Description .................... D. Specification .................... E. LCD Display ..............F. Switch and Keypad Controls ..................G. Icon Description 2. pH CALIBRATION, CARE & MAINTENANCE ...................... -
Page 3: Introduction
1. INTRDUCTION A. Overview Thank you for purchasing the HM-500 (HydroMaster), by HM Digital. The HM-500 monitors pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS) and temperature with very high accuracy. This instrument can be calibrated with various buffer solutions, and is equipped with automatic buffer recognition for user convenience. -
Page 4: Specification
D. Specifications Measurement Range • pH: 0.00 - 1pH 4.00 • Temperature: 0 - 55 °C / 32 - 130 °F • TDS: 0 - 9999 ppm / 0 - 10.00 ppt • EC: 0 - 9999 µS / 0 - 20.00 mS Automatic Temperature Compensation Range (ATC) •... -
Page 5: Lcd Display
E. LCD Screen Display Saved Data Numbers pH Readings Temp Readings EC/TDS Readings Touch Screen Buttons F. Switch and Keypad Controls Touch 3 seconds to change from the home screen mode to menu. Quick touch to save readings while in the home screen mode. Touch for 3 seconds to recall saved data. -
Page 6: Icon Description
G. Icon Description Changes to menu mode from the home screen Calibration Mode Indicator Alarm setting indicator and for making corrections Alarm Delay Indicator pH meter sensor is unstable Device needs maintenance Out of range alarm indicator Recalls saved data and measurement readings Saving data Device is in charging mode Battery life indicator... -
Page 7: Ph Calibration, Care & Maintenance
2. pH CALIBRATION, CARE & MAINTENANCE A. pH Information & Maintenance [The pH electrode included with the HydroMaster (HM-500) has been carefully handcrafted. For optimal performance and probe longevity, carefully follow the instructions below.] • The life of a pH electrode will depend on how it is used and maintained. (It is backed by a 6 month factory warranty) •... -
Page 8: Ph Calibration
[Warning] • Calibration is required when replacing the electrode or after long-term (inactive) storage to ensure accurate readings. • Calibrate 1st to pH 7.00 then pH 4.00, or pH 10.00 buffer solutions, based on your application. C. pH Calibration 1. From HOME SCREEN, press and hold the [MENU] button for 3 seconds to select [MENU] mode. -
Page 9: Ec/Tds Calibration & Maintenance
3. EC/TDS CALIBRATION & MAINTENANCE A. EC/TDS Basic Information. EC (Electrical Conductivity) and TDS (Total Dissolved Solids) are closely related. TDS measures the concentration of dissolved solids within water or a nutrient solution. TDS is calculated by sending a charge in the water which measures the electrical conductivity of that solution, and is then converted to TDS using the following conversion factors: [Conversion Factors]... -
Page 10: Ec/Tds Maintenance
B. EC/TDS Electrode Maintenance. • Avoid direct sunlight or heat. • Do not touch sensor pins of the electrode with your hands or sharp materials. • Scratching electrodes will cause corrosion. • To clean contaminated sensor, please use alcohol with a soft cloth to clean and then rinse with clean water or distilled water (preferably). -
Page 11: Ec/Tds Calibration
D. EC/TDS Calibration. The HM-500 is factory calibrated to a 1000ppm NaCl (.5) solution, (2000µS). 1. Select desired EC/TDS measurement scale. (1000ppm is used in the example below). If needing to measure TDS with a NaCl standard solution, please change the scale to ppm-0.5 (NaCl) conversion factor before calibration. 2. - Page 12 6. Once the reading stabilizes, use the [UP/DOWN] key to change reading to desired calibration point. CAUTION: Pressing and holding the key will change the reading at a faster rate. 7. After calibration has begun, “C..CA..CAL” will blink in this order across the display screen.
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Page 13: Ec/Tds Temperature Reading Calibration
E. EC/TDS Temperature Reading and Calibration. The Temperature sensor is located on the bottom of the EC/TDS electrode. When calibrating temperature, do so with solution with known temperature value only. [To Select ˚C or ˚F] 1. Press [MENU] for 3 seconds to enter menu mode 2. -
Page 14: Data Storage
4. DATA STORAGE The HM-500 can store and recall up to 20 consecutive readings. A. Saving Your Readings. 1. With power on, immerse the sensor(s) into the solution for measurements. 2. After the reading has stabilized, press the [SAVE] key. 3. -
Page 15: Alarm Settings
5. Alarm Setting The HM-500 features two different alarm functions that allow you to input high and low settings and will alert you with a beeping sound when the pH, EC/TDS and temperature readings reach those corresponding settings. Alarm Settings. Please Note: Setting High and Low alarm values for pH, Temperature, and EC/TDS is done using the same method. -
Page 16: Alarm Sound & Delaying Your Alarm
6. Alarm Sound & Delaying Your Alarm A. Alarm Sound. The HM-500 has 3 different alarm types. Alarm Options: o Cont : Continuous alarm o AL10 : 10 second alarm every 10 min. o Mute : Mute 1. Press [MENU] key for 3 seconds. 2. -
Page 17: Clearing Saved Data
8. Clearing Saved Data Data Clear Options: o SAVE : Delete all the Saved Readings data. o AL : Delete all the alarm ranges. o CAL : Reset to factory calibration. This will delete any previously saved calibrations 1. Press and hold [MENU] key for 3 seconds. 2. -
Page 18: Warranty
1. HydroMaster (HM-500): Three Year Limited Warranty 2. pH Probe (SP-P5): Six Month Limited Warranty The HydroMaster (”HM-500”), manufactured by HM Digital, Inc. (“the Company”) is warranted to the purchaser against defective materials and workmanship for three (3) years from the date of purchase. -
Page 19: Contact Information
9. Contact Information HM Digital, Inc. is a leading manufacturer of professional water testing instruments that tests for EC, TDS, pH, ORP, temperature and volume. Our products include handheld meters, in-line monitors, controllers, sensors, calibration solutions and more. Commercial/Industrial & Personal Applications: •...
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