HI 504910 Digital Transmitter Instruction Manual
TABLE OF CONTENTS WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . 5 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . 5 FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . 6 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 CALIBRATION MODE . . . . . . . . . . . . . . . . . . . . . . 12 SETUP MODE . . . . . . . . . .
Dear Customer, Thank you for choosing a Hanna Product. Please read this instruction manual carefully before using the instrument. It will provide you with the necessary information for correct use of the instrument, as well as a precise idea of its versatility. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com. This instrument is in compliance with the directives.
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 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12.
Keyboard and LCD for HI 504910 are normally provided by HI 504920. To do this, HI 504920 has to be put into terminal mode, by selecting code 90 in Setup mode. If the HI 504920 meter is not handy, the keyboard and LCD inside the transmitter case can be used for configuring, calibrating and monitoring HI 504910. 1. 2. 3. 4. 5. 6. 7. 8. 9. Liquid Crystal Display ON/OFF key, to turn the HI 504920 on and off.
Note Throughout this manual every reference to keyboard or LCD refers to HI 504920 keyboard and LCD. When using the HI 504910 internal keyboard and LCD, refer to the below table to match keys. HI 504920 HI 504910 DISPLAY DISPLAY (ALT+) CAL DATA CAL DATA (ALT+) SETUP SETUP (ALT+) CAL CAL CFM CFM The two LCD’s have the same appearance; the only difference is the LOG tag blinking on the HI 504920 display to indicate that the meter is operating in terminal mode.
SPECIFICATIONS Range -2.00 to 16.00 pH -2000 to 2000 mV -30 to 130.0 ºC Resolution 0.01 pH 1 mV 0.1 ºC Accuracy ±0.02 pH ±2 mV ±0.5 ºC (@20°C/68°F) Typical EMC Deviation ±0.2 pH ±10 mV ±0.
INSTALLATION • Remove the connectors protecting shield and wire the meter as explained below. Note Note 10 • Power supply input (24V AC/DC): connect a 2-wire power cable (with a minimum cross area of 0.75 mmq) to the terminals #1 and #2. If using a DC supply, connect the positive wire to the terminal #1. • RS485 serial interface (for communicating with the HI 504 controller): connect a twisted shielded cable to terminals #3 (B) and #4 (A).
• pH or ORP electrode: connect the shield of the electrode coaxial cable (electrode reference) to the terminal #10, and the electrode coaxial cable core to terminal #11. To benefit from the differential (symmetrical) input, connect the proper electrode wire or a cable with a potential matching pin (grounding bar) to the relevant terminal (#9). If the matching pin is not available, short pins #9 and #10. Note Note All connected cables should end with cable lugs.
CALIBRATION MODE The calibration mode allows to calibrate the pH/ORP and temperature inputs. The instrument is factory calibrated for all these parameters. Periodical calibration of the instrument is recommended, in particular when greatest accuracy is required and at least biyearly. The electrode can be calibrated over only one point but, when possible, it is always good practice to perform a 2point calibration.
Note If the probe offset is outside the allowed limits, if the HI 504910 transmitter is configured for ORP measurement, or if some other error occurs during calibration, the display will flash a “bAd” message. Press TXCAL to return to normal mode and restart the calibration procedure from the beginning. • The primary LCD will then display the pH reading of the HI 504910 transmitter, while the secondary LCD will show the HI 504920 reading. Both pH tags blink alternatively.
the HI 504920 pH reading. Both pH tags blink alternatively. • To return to normal mode, press ALT and TXCAL. • If a communication error between the portable meter and the transmitter occurs, the primary LCD shows the “rSEr” message: check the interface cable and connections. • If the LCD shows “...”, verify that the HI 504910 transmitter be configured for pH (not for ORP) measurement. USING HI 504920 AS TERMINAL FOR HI 504910 Select code 90 in Setup mode and press CFM to confirm.
The pH calibration can not be performed if the pH electrode is broken or leaking or the reference electrode is broken or dirty and an error is active. The ORP calibration can not be performed if the “Reference electrode broken or dirty” error is active. The temperature probe should be connected to the instrument. Initial Preparation Pour small quantities of pH 7.01 (HI 7007) and pH 4.01 (HI 7004) or pH 10.01 (HI 7010) solutions into individual beakers.
Note The electrode should be submerged approximately 4 cm (11/2’’) in the solution. The temperature probe has to be located as close as possible to the pH electrode. Note When it is not possible to immerse the Potential Matching Pin together with the pH electrode in the solution, disable the differential input by setting setup item I.04 to “OFF”.
ing message “time-out”, then shows “WRONG” and it is not possible to complete calibration. • At the end of calibration, with the meter set as pH controller, the instrument checks if the offset is between -30 and 30 mV and the slope between 53.5 and 62 mV/pH. If the values are not within these ranges, the message “OLd ProbE” scrolls twice across the LCD.
Note If (ALT+) SETUP are pressed instead of CFM, the calibration value selection is aborted and the meter reverts back to a two-point calibration. Note If the calibration is performed by means of the HI 504910 internal keyboard and LCD (not through the HI 504920 meter), the calibration date and time are set to a default 1/1/ 2002 00:00 : in this case disable the calibration timeout in HI 504. ORP CALIBRATION Check that the code 90 has been entered in Setup mode.
• For the second calibration point it is possible to choose between 350 mV and 1900 mV. Pressing the or key the value on the secondary LCD will switch between the two possibilities. • Once selected the second calibration point, set the HI 931001 (350 mV) or HI 8427 (350 or 1900 mV) simulator to the same value and the calibration proceeds as for the first point. Note In ORP calibration there is no time-out. TEMPERATURE CALIBRATION Check that the code 90 has been entered in Setup mode.
ary LCD will show the first calibration point (0°C). • When the reading becomes stable, if the temperature value is close to the calibration point the CFM tag starts blinking, otherwise the WRONG indicator will flash. • In the first case press the CFM key to confirm calibration. The meter will proceed showing the scrolling message “Press CFM again to confirm the current buffer or right to escape” (to prevent from confirming the calibration point inadvertently).
During pH measurements the instrument reads a mV value from the electrode and then converts it into a pH value. • Connect a HI 931001 or HI 8427 simulator to the BNC socket. • Once entered the calibration mode, move through the menu with or key, select the Volt calibration (the primary LCD shows “UOLt” message) and confirm it by pressing the CFM key. • After confirmation the primary LCD will show the actual mV value and the secondary LCD will display the first calibration point.
SETUP MODE The Setup Mode allows the user to set all needed characteristics of the meter. Press (ALT+) SETUP and enter the password when the device is in idle or control mode. If the correct password is not entered, the user can only view the setup parameters (except for passwords) without modifying them (and the device continues to acquire and transmit measurements).
Note The default password is set at “0000”. ENTERING SETUP ITEMS After confirmation of the password the primary LCD will show the name of the first setup group (see table) while the secondary LCD will display the setup code of the first item of the group. • By pressing the or key it is possible to cycle through the setup groups; the secondary LCD will always show the code of the first item of the group. • Once a group is selected, it is possible to choose an item manually.
• Once a value is set, press the CFM key to confirm. The instrument will turn to the next item and the new item’s value will be displayed on the primary LCD. • If a wrong value is confirmed, the WRONG indicator starts blinking, the new value is not accepted and the instrument will not switch to the next item until a correct value will be confirmed. • Instead of selecting the item manually, it is possible to cycle through all the items of a selected group by pressing repeatedly CFM key.
The below table lists the setup codes along with the description of the specific setup items, their valid values and whether the item is present for ORP mode. Code Valid Values Default Present for ORP G.00 pH/ORP input “PH”, “OrP” (see note 4) “PH” yes G.01 Temperature compensation “AtC”: Automatic “USEr”: Manual (see note 3) “AtC” no G.02 Manual or probe error temperature -30 to 130.0 ºC (see note 3) 25.0 no G.10 Factory ID 0000 to 9999 (see note 9) 0000 yes G.
Code Valid Values Default Present for ORP F.00 pH or ORP actual value (see note 7) measured value -1.00 pH or -200 mV to measured value +1.00 pH or +200 mV measured value yes F.01 pH or ORP reading offset adjustment -1.00 to +1.00 pH or -200 to +200 mV 0.00 pH or 0 mV yes F.10 Temperature actual value (for ATC only, see note 8) measured value -10.0 ºC to measured value +10.0 ºC meas. value (see note 7) no 0.0 ºC no READING OFFSETS (“OFFS”) F.11 Temperature reading offset -10.0 to +10.
(4): Whenever the pH/ORP selection item is changed from pH into ORP or vice versa all of the calibration and setup data regarding pH (when changing to ORP) or ORP (when changing to pH) are kept. They are automatically restored if the measured magnitude is changed back later.
MEASURE MODE The measure mode is the normal mode for the instrument. During measure mode, pH and temperature or ORP measurements are acquired and sent to HI 504 or to a PC with HI 92500 or another software implementing the communication protocol described in this manual (see the “RS485 communication section”). In a normal situation, during measure mode the green LED is ON and the red LED is OFF (LEDs are located inside the instrument case).
• • • • • • • • • Clean and check the electrode. pH electrode broken or leakage (10) : The electrode glass is broken or short circuits have been caused by moisture or dirt. Check pH probe and cable; replace them if necessary. Reference electrode broken or dirty (11) : The reference electrode is soiled or broken. Also the reference electrode or the matching pin could not have been immersed in the solution. Clean the electrode and replace it when necessary.
pH/ORP PROBE CHECK Note Note 30 The pH electrode and the reference electrode for both pH and ORP can be automatically monitored through HI 504910. Setup items involved are I.13 (pH electrode impedance test enable), I.14 (reference electrode impedance test enable) and I.15 (maximum reference electrode impedance). A “pH electrode broken or leakage error” (error code: 10) is generated whenever the pH electrode impedance is less than 1 MΩ.
TEMPERATURE COMPENSATION If the setup item G.01 is set to “AtC” an automatic temperature compensation will be performed using the temperature value acquired with the Pt100/Pt1000 input. If the probe appears to be unconnected, or anyway it does not give a valid temperature (temperature outside the -30 to 130°C range), the instrument will generate a broken temperature probe error. In this case the temperature will be automatically set to the setup item G.
LAST CALIBRATION DATA If the instrument is set as pH meter, the following data about the last calibration are stored in the EEPROM: • Date • time • offset, in mV • slope, in mV/pH • up to two buffers. If the instrument is set as ORP meter, the data stored in the EEPROM are the following: • Date • time • first calibration point • second calibration point. While displaying these data the HI 504910 continues to acquire and transmit measurements. To enter the last calibration data mode, press (ALT+) CAL DATA.
Note At any time pressing the DISPLAY key or (ALT+) SETUP keys the meter will return to the regular operating display. • Press the or key to view the time of last calibration. The secondary display will show “HOU” to indicate “hour and minute” while the primary LCD will show the time as HH:mm format. • Press the or key again to view the offset in mV at the time of last calibration. The secondary display will show “OFF” to indicate “offset”.
OFFSET AND SLOPE DIRECT SELECTION It is possible to edit directly the values of the offset and the slope to calibrate the instrument (for pH). • Press (ALT+) CAL DATA entering the last calibration data scrolling and then press (ALT+) SETUP. • A password entry is required. If a wrong password is confirmed, the instrument reverts back to the normal mode.
• If an offset calibration has been made, the instrument will turn to “slope” calibration (as indicated by the “SLO” message on the secondary display. The slope value is shown on the primary LCD and the first digit is blinking to permit modifications). • Press the or key to modify the value or key to move to the next digit. • Once selected the desired value, press CFM to confirm. • After confirmation the instrument will turn back to normal mode.
EVENT LOG FILE SCROLLING The event log file is composed of maximum 100 recorded events, which include errors, calibration events (type of calibration) and configuration changes. Event log file information is primarily intended for service personnel. To enter the event log file scrolling, press the DISPLAY key while in normal measurement mode. Event scrolling does not affect acquisition and transmission of measurements, which continue normally.
FAULT CONDITIONS The below fault conditions may be detected by the software: • EEPROM data error • serial communication internal bus failure • dead loop. EEPROM data error can be detected through EEPROM test procedure at start-up or when explicitly requested using setup menu, or during normal operational mode if a checksum control fails. When an EEPROM error is detected during normal mode, a fault alarm is generated. To close an error an EEPROM test (see “Selftest procedures” section) or reset is required.
RS485 COMMUNICATION The digital transmission of measurements, error and status information is implemented through an RS485 link. The transmission can be directed to an HI 504 or to a computer workstation, which can be connected locally or remotely through a modem connection. RS485 standard is a digital transmission method that allows long lines connections. Its current-loop system makes this standard suitable for data transmission in noisy environments.
CONNECTIONS The connections for the 2-pin RS485 terminal provided are as follows: The instrument has no internal line termination. To terminate the line, an external resistor equal to the characteristic line impedance (typically 120Ω) must be added at both ends of the line. The RS485 can connect up to 31 Digital Transmitters on the same physical network. All the units are slave devices and are monitored and controlled by a single master station (typically an industrial PLC or PC).
If using HI 504 the fail safe resistors are already connected on it, so they are necessary only if the HI 504910 transmitter is connected to a PC. The interface signals are optoisolated from the ground of the instrument, the electrode and the temperature sensor. Before connecting the meter to the computer, consult the computer manual. The instrument can only work as a slave component. In other words it can work as a remote terminal equipment answering to the commands only.
Following is the complete list of commands available: Command Parameter Remarks NNMDR not available NNSTS not available Requests instrument status (LEDs, configuration change flag, etc.
(*) C1C2C3C4 are ASCII chars corresponding to the setup item content; P1P2 are two additional bytes used for sign and half digit as follows: P1 = + if>0 P1 = - if<0 P2 = 0 if most significant digit is not used P2 = 1 if most significant digit is used When an item is shorter than 4 digits the Ci characters are filled with blanks. Following are examples for setup item format: • item I.12, minimum pH probe slope: parameter value = 56.
The “NNSET...” and “NNGET...” commands when used for password items, baud rate, F.00 and F.10 items, are answered with “NN”.
The meaning of B1 and B2 is: B2 bit 0 green LED (1: ON; 0: OFF) B2 bit 1,2 red LED (bit 2 = 0 and bit 1 = 0: LED is OFF; bit 2 = 1 and bit 1 = 0: LED is fixed ON; bit 2 = 1 and bit 1 = 1: LED blinks) B2 bit 3 free for future use (and set to 0) B2 bit 4 free for future use (and set to 0) B2 bit 5 free for future use (and set to 0) B2 bit 6 free for future use (and set to 0) B2 bit 7 free for future use (and set to 0) B1 bit 0 free for future use (and set to 0) B1 bit 1,2 setup mode (bit 2=0 and bit 1=0: not
buf1 ASCII string for a float (example: “7.01”) buf2 ASCII string for a float (example: “4.01”) When some of the above items is missing (for example buf3 when a 2-point calibration is performed) it is indicated with a “N” letter.
B2 bit 3 B2 bit 4 B2 bit 5 B2 bit 6 B2 bit 7 B1 bit 0 B1 bit 1 B1 bit 2 B1 bit 3 B1 bit 4 B1 bit 5 B1 bit 6 B1 bit 7 free for future use (and set to 0) Power reset EEPROM corruption Watchdog reset free for future use (and set to 0) free for future use (and set to 0) free for future use (and set to 0) free for future use (and set to 0) free for future use (and set to 0) free for future use (and set to 0) free for future use (and set to 0) free for future use (and set to 0) free for future use (and set to 0)
MODEM CONNECTION A modem connection can be established between the HI 504910 transmitter and a remote computer over a telephone line. Setup item O.31 (“Modem calls answer enable”) must be set to “On”. A standard modem connected to the HI 504910 transmitter through an RS232 to RS485 adapter, or the Hanna GSM module HI 504900 (with a SIM card able to receive data calls) can be used.
into pieces, send them all to the modem one by one till the end, even if one or more of them give errors. The connection may be established and work well even if some error occurs during configuration. When making a call, after the data connection is established, the “NNPWD...” command (where “NN” is the address of the device controlling the modem, i.e. the one with O.31 set to “On”) must be issued by the remote computer within 15 seconds.
SELFTEST PROCEDURES The selftest procedure can be made only entering the setup menu and selecting one of the items of the “tESt” group (t.00 - t.03). Note All the tests are made while in setup mode, where a time-out is present. If no action is performed for about 5 minutes, the mode is automatically exited and the instruments returns to previous mode. DISPLAY TEST The display selftest procedure consists of lighting up all the display segments together. • To start the procedure select setup item t.
EEPROM SELFTEST The EEPROM selftest procedure involves verifying the stored EEPROM checksum. • To enter the EEPROM test procedure select the setup item t.02 and an “OFF” blinking message will appear on the LCD. • Press the (or ) key once and the message will switch to a blinking “GO”. • Press CFM key to confirm or the (or ) key again to return to the previous status. • If confirmation is given when the “OFF” message is blinking, no action is performed and it will move to the next setup item (t.03).
LEDs TEST • To enter the LEDs test procedure select the setup item t.03 and an “OFF” blinking message will appear on the LCD. • Press the (or ) key once and the message will switch to a blinking “GO”. • Press CFM key to confirm or the (or ) key again to return to the previous status. • If confirmation is given when the “OFF” message is blinking, no action is performed and it will move to the first setup item of the group (t.00).
pH VALUES AT VARIOUS TEMPERATURES Temperature has a significant effect on pH. The calibration buffer solutions are effected by temperature changes to a lesser degree than normal solutions. For manual temperature calibration please refer to the following chart: TEMP °C °F 32 0 41 5 50 10 59 15 68 20 77 25 86 30 95 35 40 104 45 113 50 122 55 131 60 140 65 149 70 158 4.01 4.01 4.00 4.00 4.00 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.09 4.11 4.12 6.86 6.98 6.95 6.92 6.90 6.88 6.86 6.85 6.84 6.84 6.83 6.83 6.
ELECTRODE CONDITIONING AND MAINTENANCE PREPARATION Remove the electrode protective cap. DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT. This is normal with electrodes and they will disappear when rinsed with water. During transport tiny bubbles of air may have formed inside the glass bulb. The electrode cannot function properly under these conditions. These bubbles can be removed by "shaking down" the electrode as you would do with a glass thermometer.
PERIODIC MAINTENANCE Inspect the electrode and the cable. The cable used for the connection to the controller must be intact and there must be no points of broken insulation on the cable or cracks on the electrode stem or bulb. Connectors must be perfectly clean and dry. If any scratches or cracks are present, replace the electrode. Rinse off any salt deposits with water. CLEANING PROCEDURE General IMPORTANT Soak in Hanna HI 7061 General Cleaning Solution for approximately ½ hour.
- Make sure cable and connections are not damaged nor lying in a pool of water or solution. • Slow Response/Excessive Drift: soak the tip in Hanna Solution HI 7061 for 30 minutes, rinse thoroughly in distilled water and then follow the Cleaning Procedure above. • For ORP Electrodes: polish the metal tip with a lightly abrasive paper (paying attention not to scratch the surface) and wash thoroughly with water.
ACCESSORIES pH CALIBRATION SOLUTIONS HI 7004M or HI 7004L HI 7006M or HI 7006L HI 7007M or HI 7007L HI 7009M or HI 7009L HI 7010M or HI 7010L pH 4.01 Buffer Solution, 230 or 500 mL bottle pH 6.86 Buffer Solution, 230 or 500 mL bottle pH 7.01 Buffer Solution, 230 or 500 mL bottle pH 9.18 Buffer Solution, 230 or 500 mL bottle pH 10.
HI 5011/5 HI 5012/5 Stainless steel Pt1000 probe with standard 1/2’’ external threads on both ends for in-line and immersion installation; 5 m (16.5’) cable Glass Pt1000 probe with external PG13.5 thread and 5 m (16.
pH AND ORP ELECTRODE HOLDERS HI 60542 In-line electrode holder for direct pipe installation HI 60545 Bypass loop electrode holder 58
HI 60501 Specifications Immersion electrode holder for tanks, vessels, baths and open channels HI 60542 HI 60545 Electrode Holder Material PVC PVC PVC O-Ring Material NBR NBR NBR Min. & Max. Temperature HI 60501 -10°C (14°F) & 60°C (144°F) Min. Immersion Length Max. Immersion Length --- --- 10 cm (3.9’’) 69 cm (27.1’’) Max. Pressure 8 BAR (116 PSI) @25°C --or 3 BAR (43.
pH AND ORP ELECTRODES Hanna Instruments produces a wide range of pH and ORP electrodes specifically designed for needs of industrial uses. For a complete list of available electrodes visit our web site at www.hannainst.com or contact your dealer.
CE DECLARATION OF CONFORMITY Recommendations for Users Before using this product, make sure that it is entirely suitable for the environment in which it is used. Operation of this instrument in residential areas could cause unacceptable interferences to radio and TV equipment. To maintain the EMC performance of equipment, the recommended cables noted in the user's manual must be used. Any variation introduced by the user to the supplied equipment may degrade the instruments' EMC performance.
USER NOTES 62
MAN504910R1 07/03 w 64 w w . h a n n a i n s t .
