User manual HANNA INSTRUMENTS C 99

[. . . ] Instruction Manual C 99 & C 200 Series Multiparameter Bench Photometers Manufacturers since 1978 1 These Instruments are in Compliance with the CE Directives Dear Customer, Thank you for choosing a Hanna product. Please read this instruction manual carefully before using the meter. This manual will provide you with the necessary information for the correct use of the instrument. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst. com. [. . . ] · To convert the result to mg/L of magnesium (Mg), multiply by a factor of 0. 243. Note: The test will detect any magnesium contamination in the beakers, measuring syringes or sample cells. To test cleanliness, repeat the test multiple times until you obtain consistent results. SAMPLE DILUTION This meter is designed to determine hardness typically found in water purification systems. In order to measure samples with high hardness, follow dilution procedure explained on page 66 (Ca Hardness). The conversion factors to convert readings in mg/L to French degrees (FD), German degrees (DD) and English degrees (ED) of hardness are as follows: 1 mg/L = 0. 1 FD = 0. 0556 DD = 0. 07 ED INTERFERENCES Interference may be caused by excessive amounts of heavy metals. 69 Hardness Mg TOTAL HARDNESS HIGH RANGE SPECIFICATIONS Range Resolution Accuracy Typical EMC Deviation Light Source Method 400 to 750 mg/L 5 mg/L ±10 mg/L ±2% of reading ±5 mg/L Tungsten lamp with narrow band interference filter @ 466 nm Adaptation of the EPA method 130. 1. The reaction between calcium, magnesium and reagents causes a red-violet tint in the sample. Description Quantity Hardness Indicator reagent HR 9. 5 mL Hardness Buffer reagent 2 drops Fixing reagent 1 packet REQUIRED REAGENTS Code HI 93735A-HR HI 93735B-0 HI 93735C-0 REAGENT SETS HI 93735-02 Reagents for 100 tests High Range (400 to 750 mg/L) HI 93735-0 Reagents for 100 tests (0 to 750 mg/L) For other accessories see page 141. MEASUREMENT PROCEDURE · Select the program number corresponding to Total Hardness HR on the secondary LCD by pressing PROGRAM and . · Using the syringe, add exactly 0. 5 mL of unreacted sample to the cuvet. · With the plastic pipette fill the cuvet up to the 10 mL mark adding HI 93735A-HR Indicator reagent. Total Hardness HR 70 · Add 2 drops of HI 93735B Buffer reagent. x2 · Replace the cap, shake gently to mix and wait for 15 seconds. · Place the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. · Press ZERO and "SIP" will blink on the display. · Wait for a few seconds and the display will show "-0. 0-". Now the meter is zeroed and ready for measurement. · Remove the cuvet and add the content of 1 packet of HI 93735C Fixing reagent. · Replace the cap and shake gently till dissolution is complete. · Place the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. 71 Total Hardness HR · Press TIMER and the display will show the countdown prior to the measurement or, alternatively, wait for 2 minutes and press READ DIRECT. In both cases "SIP" will blink during measurement. · The instrument directly displays the total hardness in mg/L of CaCO3, on the Liquid Crystal Display. · The conversion factors to convert readings in mg/L to French Degrees (FD), German Degrees (DD) and English Degrees (ED) of hardness are as follows: 1 mg/L= 0. 1 FD = 0. 0556 DD = 0. 07 ED INTERFERENCES Interference may be caused by excessive amounts of heavy metals. Note: if the sample is very acidic, some extra drops of HI 93735B Buffer reagent may be added. Total Hardness HR 72 TOTAL HARDNESS MEDIUM RANGE SPECIFICATIONS Range Resolution Accuracy Typical EMC Deviation Light Source Method 200 to 500 mg/L 5 mg/L ±7 mg/L ±3% of reading ±5 mg/L Tungsten lamp with narrow band interference filter @ 466 nm Adaptation of the EPA method 130. 1. The reaction between calcium, magnesium and reagents causes a red-violet tint in the sample. Description Quantity Hardness Indicator reagent MR 9. 5 mL Hardness Buffer reagent 2 drops Fixing reagent 1 packet REQUIRED REAGENTS Code HI 93735A-MR HI 93735B-0 HI 93735C-0 REAGENT SETS HI 93735-01 Reagents for 100 tests Medium Range (200 to 500 mg/L) HI 93735-0 Reagents for 100 tests (0 to 750 mg/L) For other accessories see page 141. MEASUREMENT PROCEDURE · Select the program number corresponding to Total Hardness MR on the secondary LCD by pressing PROGRAM and . · Using the syringe, add exactly 0. 5 mL of unreacted sample to the cuvet. · With the plastic pipette fill the cuvet up to the 10 mL mark adding HI 93735A-MR Indicator reagent. 73 Total Hardness MR · Add 2 drops of HI 93735B Buffer reagent x2 · Replace the cap and shake gently to mix. · Place the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. · Press ZERO and "SIP" will blink on the display. · Wait for a few seconds and the display will show "-0. 0-". Now the meter is zeroed and ready for measurement. · Remove the cuvet and add the content of 1 packet of HI 93735C Fixing reagent. · Replace the cap and shake gently till dissolution is complete. · Place the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. Total Hardness MR 74 · Press TIMER and the display will show the countdown prior to the measurement or, alternatively, wait for 2 minutes and press READ DIRECT. In both cases "SIP" will blink during measurement. · The instrument directly displays the hardness in mg/L of CaCO3, on the Liquid Crystal Display. · The conversion factors to convert readings in mg/L to French Degrees (FD), German Degrees (DD) and English Degrees (ED) of hardness are as follows: 1 mg/L= 0. 1 FD = 0. 0556 DD = 0. 07 ED INTERFERENCES Interference may be caused by excessive amounts of heavy metals. Note: if the sample is very acidic, some extra drops of HI 93735B Buffer reagent may be added. 75 Total Hardness MR TOTAL HARDNESS LOW RANGE SPECIFICATIONS Range Resolution Accuracy Typical EMC Deviation Light Source Method 0 to 250 mg/L 1 mg/L from 0 to 100 mg/L 5 mg/L from 100 to 250 mg/L ±5 mg/L ±4% of reading ±5 mg/L Tungsten lamp with narrow band interference filter @ 466 nm Adaptation of the EPA method 130. 1. [. . . ] However, the meter has an auto-shut off feature that will turn itself off after 10 minutes of non-use. A blinking "LOBAT" on the display, while a measurement is in progress, indicates low voltage and the batteries should be replaced. If the batteries are not replaced immediately, in order to prevent erroneous readings due to low voltage, "-BA-" is displayed soon afterwards. At this point the batteries must be changed. [. . . ]