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. [. . . ] 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. The alarm can be set to actuate at any point from 0. 00 to 5. 00 mg/L. · 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). The full scale span of the recorder would then be 1. 5 mg/L, yielding a magnified view of the 3. 0 to 4. 5 mg/L concentration range on the recorder. To set the lower limit of the recorder output · Press REC. MIN. Display will show the previously set minimum recorder level (e. g. The most significant digit will be blinking. REC. MIN · Using the and keys set the new minimum recorder level (e. g. 3. 00 mg/L). · Press REC. MIN a second time. The display will blink the new setpoint for the low end of the recorder output. REC. MIN 30 · If you want to store the new setpoint promptly press REC. MIN again. Display will show "Stor" for a short time indicating that the new setpoint is stored and will return to the Chlorine concentration display. REC. [. . . ] 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. ERROR 9 - LOW BLANK READING If the sample blank is highly colored or turbid, the light level may be inadequate for a proper operation. This situation is indicated by the activation of the analyzer system alarm relay and the appearance of "E09" on the display. This condition can also be caused by failure of the LED light source. [. . . ]