HI 700 / HI 710 Series Process, Panel-mounted, Microprocessor-based, Conductivity and TDS Controllers Instruction Manual
Dear Customer, Thank you for choosing a Hanna Product. TABLE OF CONTENTS PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . 4 This instruction manual has been written for the following products: α EC controller with dual setpoint, ON/OFF HI 700221-α and PID controls, analog output. α EC controller with dual setpoint, ON/OFF HI 700222-α and PID controls, RS485 port. α EC and TDS controller with dual setpoint, HI 710221-α ON/OFF and PID controls, analog output.
PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipping. If there is any noticeable damage, notify your Dealer or the nearest Hanna Customer Service Center immediately. Note Save all packing materials until you are sure that the instrument functions correctly. Any damaged or defective items must be returned in their original packing materials together with the supplied accessories.
FUNCTIONAL DESCRIPTION REAR PANEL FRONT PANEL 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Liquid Crystal Display SETUP key enters setup mode CFM key confirms current choice (and skips to the next item) CAL key initiates and exits calibration mode key increases the blinking digit/letter by one when selecting a parameter. Advances forward while in last calibration data viewing mode.
SPECIFICATIONS INSTALLATION Ranges 0.0 to 199.9 μS, 0 to 1999 μS 0.00 to 19.99 mS, 0.0 to 199.9 mS 0.0 to 100.0 ppm, 0 to 1000 ppm (HI 710* only) 0.00 to 10.00 ppt, 0.0 to 100.0 ppt (HI 710* only) -10.0 to 100.0 °C Resolution 0.1 μS, 1 μS, 0.01 mS, 0.1 mS 0.1 ppm, 1 ppm (HI 710 models only) 0.01 ppm, 0.1 ppm (HI 710 models only) 0.1 °C Accuracy (@20°C/68°F) ±0.5 % F.S. (EC and TDS) ±0.5°C (0 to 70°C), ±1°C (outside) Typical EMC Deviation ±2 % F.S. (EC and TDS) / ±0.
• Power Supply: Connect a 3-wire power cable to the terminal strip, while paying attention to the correct live (L), earth (PE) and neutral (N) terminal connections. Power: 115 Vac -100 mA / 230 Vac - 50 mA. Live Contact: fused inside 400 mA. PE leakage current 1 mA; this contact must be connected to ground. • Conductivity input: the default input is from conductivity probe. Connect the EC probe to the terminals #10 on page 7.
• Then confirm the displayed digit with and move to the next one. SETUP MODE HI 700 and HI 710 offer a multitude of possibilities from ON/OFF or PID dosage to analog recorder output and from alarm to selftest features. The Setup Mode allows the user to set all needed characteristics of the meter. The setup mode is entered by pressing SETUP and entering the password when the device is in idle or control mode.
• After confirmation, the selected parameter is displayed. The user can scroll through the parameters by pressing CFM. In order to directly set another parameter, press SETUP again and enter the code or scroll to it by pressing CFM. The following table lists the setup codes along with the description of the specific setup items, their valid values and whether password is required to view that item (“PW” column): 14 Code Valid Values Default PW 14 Relay 1 deviation (D1) 0.5 to 10% f.s. 1% f.s.
Note Code Valid Values Default PW 60 Current day 01 to 31 from RTC no 61 Current month 01 to 12 from RTC no 62 Current year 1998 to 9999 from RTC no 63 Current time 00:00 to 23:59 from RTC no 71 Baud rate (RS485) 1200, 2400, 4800, 9600 9600 no 72 Cleaning timer 0 to 19999 days 0 no 73 Initial cleaning day 01 to 31 01 no 74 Initial cleaning month 01 to 12 01 no 75 Initial cleaning year 1998 to 9999 1998 no 76 Initial cleaning time 00:00 to 23:59 00:00 no 77 Cleani
CONTROL MODE The control mode is the normal operational mode for these meters. During control mode the meter fulfills the following main tasks: • converts information from EC/TDS and temperature inputs to digital values; • controls relays and generates the analog outputs as determined by the setup configuration, displays alarm condition; In HI 710 models it is possible to switch between EC and TDS reading pressing “LCD”.
control a low conductivity dosing pump. dition of low or high conductivity solution. An example of how the response overshoot can be improved with a proper rate action setting is depicted in the following graphic. ON EC OFF Setpoint Setpoint + Hysteresis EC P.I.D. CONTROL MODE PID control is designed to eliminate the cycling associated with ON/OFF control in a rapid and steady way by means of the combination of the proportional, integral and derivative control methods.
The proportional action is set through the setup procedure as “Deviation” in percent of full scale of the selected range. Each setpoint has a selectable deviation: D1 for setpoint1 and D2 for setpoint2. Two further parameters must be provided for both setpoints: Ti = Kp/Ki, reset time, measured in minutes Td = Kd/Kp, rate time, measured in minutes. Ti1 and Td1 will be the reset time and rate time for setpoint1, while Ti2 and Td2 will be the reset time and the rate time for setpoint2.
ALARM RELAY This is an important feature since with most meters the alarm terminals close only when an abnormal situation arises, however, due to line interruption, no alarm is sounded, causing extensive damage. On the other hand, software is employed to set off the alarm in abnormal circumstances, for example, if the dosing terminals are closed for too long a period. In both cases, the red LED’s will also provide a visual warning signal.
IDLE MODE ANALOG OUTPUT Idle mode is entered through setup code 2. During idle mode the device performs the same tasks as when it is in control mode except for the relays. The alarm relay is activated (no alarm condition), the control relays are not activated while the analog output remains activated. When the instrument is in idle mode the red and green status LEDs are on. HI 700221 and HI 710 221 models are provided with the analog output feature.
output matching a different EC or TDS range, for example, 4 mA = 30 mS and 20 mA = 50 mS. To change the default values, the setup mode must be entered. Setup codes for changing the analog output minimum and maximum are 41 or 42, respectively. For the exact procedure, refer to the setup mode section in the manual. Note The analog output is factory calibrated through software. The user may also perform the calibration procedure as explained in the following.
CONNECTIONS As additional feature, the controller is also provided with two pins (5V and 0V) in order to apply the Fail Safe Open Line protection method. To avoid erroneous readings in Open-Line conditions, pullup and pull-down resistors should be connected as shown.
Command Parameter CAR null Request calibration data GET NN Request setup item NN K 01 null Same as CFM+ +CAL keys K 02 null Same as LCD+CAL+SETUP keys KCD null Same as CAL DATA key KCF null Same as CFM key KCL null Same as CAL key KDS null Same as LCD key KDW null Same as key KRG null Same as key KST null Same as SETUP key KUP null Same as key MDR null Request firmware code ECR null Request EC reading (in control or idle mode only) TDR null Request TDS rea
Note The controller answers to the GET command with the same data format explained in the SET command. control action is active, no alarm condition is present and controller setup is modified (must update controller setup for PC - GET command for setup items). Following are examples of answers: 1) “03+01200” The controller with process ID number 03 says that its current setpoint is +12.00 mS.
Offset Calibration CALIBRATION • To perform the EC calibration enter the calibration mode, by pressing CAL and entering the password. • After the correct password is entered, the control actions stop and the primary LCD will display the first calibration value, with the "CAL" indicator blinking. The secondary LCD displays the temperature. The controller is factory calibrated for temperature as well as for the analog input and outputs. The user should periodically calibrate the instrument for EC or TDS.
• Press CFM to confirm the calibration point; if the reading is close to the selected solution, the meter stores the reading. If the reading is not close to the selected solution, "ERROR" will blink. Note A 2-point calibration is always suggested. However the EC calibration can also be performed at 1 point. To calibrate offset only, just press CAL after confirmation (with CFM) of the zero reading; the meter will return to normal operational mode.
TEMPERATURE CALIBRATION The controller is factory calibrated for temperature. However, the user may also perform a one point temperature calibration. This procedure is to calibrate the offset only; the slope will remain as factory calibrated. • Prepare a beaker containing a solution at a given temperature inside the range of the meter. • Use a Checktemp or a calibrated thermometer with a resolution of 0.1° as a reference thermometer.
ANALOG OUTPUT CALIBRATION In the meters where the analog output is available, this feature is factory calibrated through software. The user may also perform these calibration procedures. IMPORTANT It is recommended to perform the output calibration at least once a year. Calibration should only be performed after 10 minutes from power up.
LAST CALIBRATION DATA The meter can display the following last calibration data: • Date • Time • Cell constant While displaying these data, the controller remains in control mode. The data are related to the selected range only. The procedure below indicates the flow. Displaying of the items follows the above sequence. • To begin the cycle press CAL DATA. The last calibration date will appear on the primary LCD as DD.MM format, while the secondary display will show the year.
scrolling "Display test" message. EEPROM SELFTEST The EEPROM selftest procedure involves verifying the stored EEPROM checksum. If the checksum is correct the “Stored data good” message will be shown for a few seconds before exiting selftest procedure. The segments are lit for a few seconds and then switched off before exiting the selftest procedure. KEYBOARD SELFTEST If not, the message “Stored data error - Press to reset stored data or to ignore”.
WATCHDOG STARTUP When a dead loop condition is detected a reset is automatically invoked. The effectiveness of watchdog capability can be tested through one of the special setup items. This test consists of executing a dummy dead loop that causes watchdog reset signal to be generated. EXTERNAL FUNCTIONS HOLD FUNCTION This function allows to perform the maintenance procedures.
EC VALUES AT VARIOUS TEMPERATURES PROBE MAINTENANCE Temperature has a significant effect on conductivity. Table below shows EC values at various temperatures for the Hanna calibration solutions. TEMPERATURE °C °F HI7030 HI8030 EC VALUES (μS/cm) HI7031 HI7033 HI7034 HI7035 HI8031 HI8033 HI8034 HI8035 HI7039 HI8039 0 32 7150 776 64 48300 65400 2760 5 41 8220 896 65 53500 74100 3180 10 50 9330 1020 67 59600 83200 3615 15 59 10480 1147 68 65400 92500 4063 16 60.
ACCESSORIES CONDUCTIVITY CALIBRATION SOLUTIONS HI 7030M 12880 μS/cm calibration solution, 230 mL bottle HI 7030L 12880 μS/cm calibration solution, 500 mL bottle HI 8030L 12880 μS/cm calibration solution, 500 mL FDA bottle HI 7031M 1413 μS/cm calibration solution, 230 mL bottle HI 7031L 1413 μS/cm calibration solution, 500 mL bottle HI 8031L 1413 μS/cm calibration solution, 500 mL FDA bottle HI 7033M 84 μS/cm calibration solution, 230 mL bottle HI 7033L 84 μS/cm calibration solution, 500 mL bottle HI 8033L 8
WARRANTY CE DECLARATION OF CONFORMITY All Hanna Instruments meters are guaranteed for two years against defects in workmanship and materials when used for their intended purpose and maintained according to instructions. The probes are guaranteed for a period of six months. This warranty is limited to repair or replacement free of charge. Damage due to accident, misuse, tampering or lack of prescribed maintenance are not covered.
TECHNICAL SERVICE CONTACTS Australia: Tel. (03) 9769.0666 • Fax (03) 9769.0699 China: Tel. (10) 88570068 • Fax (10) 88570060 Egypt: Tel. & Fax (02) 2758.683 Germany: Tel. (07851) 9129-0 • Fax (07851) 9129-99 Greece: Tel. (210) 823.5192 • Fax (210) 884.0210 Indonesia: Tel. (21) 4584.2941 • Fax (21) 4584.2942 Japan: Tel. (03) 3258.9565 • Fax (03) 3258.9567 Korea: Tel. (02) 2278.5147 • Fax (02) 2264.1729 Malaysia: Tel. (603) 5638.9940 • Fax (603) 5638.9829 Singapore: Tel. 6296.7118 • Fax 6291.
