User manual HANNA INSTRUMENTS PCA 300

[. . . ] PCA 300/PCA 301 Series Panel-mounted, Microprocessor-based Chlorine Analyzers Instruction Manual Dear Customer, Thank you for choosing a Hanna Product. This instruction manual has been written for the following products: PCA 300 Free Chlorine Analyzer with features such as alarm functions, user-selectable sampling periods, LED warning indications, recorder outputs, RS232 port and a Nema 4X, 12 and 13 enclosure. PCA 301 Total Chlorine Analyzer with features such as alarm functions, userselectable sampling periods, LED warning indications, recorder outputs, RS232 port and a Nema 4X, 12 and 13 enclosure. PCA 300A Same as PCA 300 except for the RS232 port which is not supplied. [. . . ] These values or any new values entered by the operator are stored in nonvolatile EEPROM which will retain the programmed values in the event of power failure. All programmable parameters are viewed or adjusted via dedicated push buttons. To check the setting of any programmable parameters, simply press the dedicated key and the setting will be shown on the display. To change the setting, enter the new setting into the display using the and keys and then quickly press the dedicated key twice . The display will show the entries for approximately 2 seconds after the last key stroke and after altering programmable parameters. The display will then revert automatically to a Chlorine concentration display. PROPORTIONAL DOSING Proportional dosing establishes and maintains a controlled and consistent concentration level. The display will show the current dosing setpoint. Note If the analyzer has been turned on for the first time, "2. 50" will appear as default setpoint. 3. 00, using the and keys. 26 · Press SETPOINT twice to store the new setpoint. · To set the range within which the proportional dosing occurs (delta), press DIAG. The display will show the last diagnostic mode and the right-most numerical digit will blink. DIAG · Enter code 400 using the and keys. · Press DIAG and the possible settings, 0. 1, 0. 2, 0. 3, 0. 4, 0. 5, 0. 6, 0. 7, 0. 8, 0. 9, 1. 0, 1. 5, 2. 0, will scroll. DIAG Note If the analyzer has been reset or turned on, "0. 1" is the default delta. 0. 5, pressing DIAG when the desired value appears. DIAG · When dosing is active, the DOSE LED turns on and the corresponding relays closes. Note If the measured concentration is lower than the delta, the dosing will be continuous until the next measurement is taken. 27 Example With the previously given values, sample rate 5 minutes and measured value 2. 8 mg/L, the proportional dosing will be active for the initial 2 minutes and will stop for the remaining 3 minutes. In fact: 0. 5 mg/L : 5 min = 0. 2 mg/L (3-2. 8) : X then X = 2 minutes. CONCENTRATION SETPOINT ALARM SETTING PCA 300 and PCA 301 are equipped with a fully programmable concentration alarm that will activate an indication when the chlorine concentration limit is exceeded. · To set the concentration level alarm setpoint, press SET ALARM and the display will show the previously programmed setpoint. Note If the analyzer has been turned on for the first time, "0. 00" will appear as default setpoint. · Using the and keys set the new the mg/L Chlorine value as desired alarm level (e. g. · Press SET ALARM twice to set the alarm level. · To set the stored value as a minimum or maximum level, press DIAG. The display will show the last diagnostic mode and the right-most numerical digit will blink. DIAG 28 · Enter code 710 using the and keys. · Press DIAG and the display will scroll through "AL --", maximum desired level, and "AL --", minimum desired level. DIAG DIAG · Press DIAG when the needed condition appears. · To see the current alarm logic (high or low alarm), press DIAG. The display will show the last diagnostic mode and the right-most numerical digit will blink. DIAG · Enter code 711 using the and keys. · Press DIAG and the display will show if the current alarm is set as minimum (LOW) or maximum (HIGH) desired level. LOW DIAG HIGH 29 · When an alarm condition is met, the ALARM LED turns on and the corresponding relays closes. RECORDER OUTPUT SPAN SETTING The selected recorder output voltage range or the 4-20 mA current output may be associated with any Chlorine concentration in the 0 to 5 mg/L range. For example, if the 0. 0 to 1. 0 V recorder output has been selected, the operator can select 0. 0 V to correspond to a concentration of 3. 0 mg/L (Recorder Minimum setting) and 1. 0 V to correspond to a concentration of 4. 5 mg/L (Recorder Maximum setting). [. . . ] Also, when in DIAG 103, "E04" can occur if the user does not press DIAG again before the displayed DVM reading goes below: a. ERROR 5 - INVALID VALUE The user attempted to set a sampling rate out of range (5 to 90 minutes). ERROR 6 - INVALID VALUE The user attempted to set one of the following above 5. 00 mg/L: 1. ERROR 7 - INVALID VALUE The user attempted to set REC. MIN at a higher value than REC. MAX. 51 ERROR 8 - LOW ABSORPTION The measured absorption is too low. [. . . ]