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Hanna Instruments HI 8931, Instruction Manual

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Hanna Instruments HI 8931 Instruction Manual Download Page 33

33

• Leave the 

HI 7638

 conductivity probe in

air (dry probe).

• When the power is on, the ammeter should read "4.0 mA" or the 

HI

8936

 transmitter with LCD should display "0".

• If not, adjust the 

HI 8936

 OFFSET

trimmer to obtain "4 mA" or "0" on
the 

HI 8936L

.

• The 

HI 8931

 controller should dis-

play "0".

• If not, adjust the 

HI 8931

 OFFSET

trimmer on the rear panel to dis-
play a zero reading.

Summary of Contents for HI 8931

Page 1: ...ies Conductivity P Conductivity P Conductivity P Conductivity P Conductivity Process rocess rocess rocess rocess Controllers and T Controllers and T Controllers and T Controllers and T Controllers and...

Page 2: ...st com These instruments are in compliance with the directives TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS Preliminary Examination 3 General Description 3...

Page 3: ...d conductivity controller designed for sim plicity of use in a wide range of industrial process applications The instruments are designed with a standard DIN panel mount with membrane keypads and larg...

Page 4: ...ecorder output in 0 20 mA or 4 20 mA configuration LED indicators which identify whether the control ler is in operation mode or selection mode overtime control function Each instrument of the HI 8931...

Page 5: ...y is pressed the corresponding LED lights up to indicate that the function is active TRIMMERS SLOPE For slope calibration ALARM To set the alarm tolerance SET COARSE To coarsely adjust the set point S...

Page 6: ...or offset calibration 3 Label with marked A B C or D instrument type 4 SET terminals for connection to a dosing pump 5 ALARM terminals for connection to an external alarm device 6 Power supply termina...

Page 7: ...tout size for the installation Side view of the panel mounted unit Adjustablelocationbrackets suppliedwiththemeter allowtheindicator to slide into the cutout and will hold the unit securely in place 1...

Page 8: ...8936CL HI 8936DL FUNCTIONAL DESCRIPTION H FUNCTIONAL DESCRIPTION H FUNCTIONAL DESCRIPTION H FUNCTIONAL DESCRIPTION H FUNCTIONAL DESCRIPTION HI II I I 8936 8936 8936 8936 8936 1 Back cover 2 Top cover...

Page 9: ...9 SIDE VIEW OF HI 8936 SERIES 1 Top cover 2 Cable glands for wiring MECHANICAL DIMENSIONS OF HI 8936A HI8936B HI8936C HI8936D...

Page 10: ...10 MECHANICAL DIMENSIONS OF HI 8936AL HI8936BL HI8936CL HI8936DL...

Page 11: ...the probe to attach to an in line system and to be used in conjunction with the HI 8936 conductivity transmitter TheHI 7635usesa4 ringpotentiometricmeasuringmethod Thismethod is highly accurate and r...

Page 12: ...d incorporates a series of four platinum rings into the probe shaft and is highly accurate requiring very little maintenance The removable plastic cover resists the harmful effect of most chemicals an...

Page 13: ...100 0 mS 0 00 mS and 10 00 mS 0 S and 1000 S 0 0 S and 100 0 S OFF AUTO ON with selection switch Adjustable from 5 min to 60 min with knob or Disable by wire strap on rear panel Continuous ON 115 or...

Page 14: ...m 6 5 x 4 3 x 2 8 1 kg 2 2 lb Range HI 8936 A AL HI 8936 B BL HI 8936 C CL HI 8936 D DL Resolution HI 8936 AL HI 8936 BL HI 8936 CL HI 8936 DL Accuracy 20 C 68 F Conductivity Probe Calibration Tempera...

Page 15: ...ntion to the polarity and the other 2 wires to the 20 V and COM while paying careful attention to the polarity 5 6 20 V supply is the regulated DC supply required for the operation of the external con...

Page 16: ...nal to the measured conductivity values Connect the wire from the recorder to terminal 1 on the instru ment and the other wire common to terminal 2 for 4 20 mA re corder output or terminal 3 for 0 20...

Page 17: ...eashortwithajumperwirebetween the terminals of the proper connectors see picture terminals 1 2 DOSING MODE SELECTION The DOSAGE switch and the corresponding right side LED on the front panel are used...

Page 18: ...top cover of the HI8936 conductivity trans mitter to obtain access to the terminal board connections HI 8936 used in conjunction with HI 8931 controller Use a PVC insulated 4 core cable to connect the...

Page 19: ...beled 4 20 mA and COM The transmitter is protected against inversion of supply voltage HI 8936 used in conjunction with an external power supply Use 2 PVC insulated 2 core cables Connect a 20 Vdc powe...

Page 20: ...Red or Pink SENSOR Brown or Orange probe pin 1 Blue probe pin 2 White probe pin 3 Green or Yellow probe pin 4 The connections for HI 7638 are as follows HI 7638 HI8936transmitter 1 probe pin 1 2 probe...

Page 21: ...2 wires connected to the 4 20mA and COM termi nals of the 4 core signal cable from the HI 8936 to the termi nals marked mA input paying careful attention to polarity Connect the other 2 wires to the 2...

Page 22: ...HI 7635 conductivity probe use rubber seals between the probe and the pipe or elbow joints A pipe sealant is also recommended to ensure a leak free joint When screwing the joints take care not to ove...

Page 23: ...The6 corecable of this probe is connected to the HI 8936 pro cess conductivity transmitter as shown The DIN connector has to be removed when this probe is used in conjunction with an HI8936 transmitt...

Page 24: ...easurements see pages 28 32 and 36 for cali bration procedures SET POINT To set the working point of the controller press the SET key The display will indicate the current set value Use a small screwd...

Page 25: ...e SET ON LED will light up ALARM Press the ALARM key and the display will show the set tolerance for the alarm Useasmallscrewdrivertoadjustthe ALARM trimmeruntilthedesiredtoleranceisdisplayed Forexamp...

Page 26: ...int When Below Setpoint Control is selected SET SELECT pins short the SET ON LED lights up when the reading is lower than the setpoint value When the dosage switch is in OFF or continuous ON position...

Page 27: ...is in AUTO position when the overtime period is overpassed To leave overtime ALARM mode and return to normal operation move the DOSING switch in OFF and then in AUTO or ON position again The dosage a...

Page 28: ...31 controller see page 22 for details Connect the HI 8931 controller to the mains see page 22 for de tails Before proceeding with the calibration make sure that the meter is in measurement mode MEASUR...

Page 29: ...e HI 8931 controller should dis play 0 value If not adjust the HI 8931 OFFSET trimmerontherearpaneltodisplay a zero reading Switch the flow on and allow the sample solution to flow through the HI7635...

Page 30: ...BL 100 HI 8936 C CL 1 HI 8936 D DL 10 Forexample usinganHI 8936A ifthemeasuredvalueis123 4mS then output current 10 x 123 4 x 16 2000 4 13 9 mA Adjust the HI 8936 SLOPE trimmer toread 13 9mA ontheamm...

Page 31: ...on on page 46 If the HI8936 is not used in conjunction with the HI8931 controller connect the transmitter to an external power supply see page 20 to the HI 7635 conductivity probe see page 21 and to a...

Page 32: ...lutions according to the different models HI 7034 80 mS cm 25 C for HI 8931A HI 8936 A AL HI 7030 12 88 mS cm 25 C for HI 8931B HI 8936 B BL HI 7031 1413 S cm 25 C for HI 8931C HI 8936 C CL HI 7033 84...

Page 33: ...mmeter should read 4 0 mA or the HI 8936 transmitter with LCD should display 0 If not adjust the HI 8936 OFFSET trimmer to obtain 4 mA or 0 on the HI 8936L The HI 8931 controller should dis play 0 If...

Page 34: ...ture of the probe is close to that of the solution the display of HI 8931 will stabilize quickly and provide a temperature compensated conductivity measurement Allow a few minutes if there is a temper...

Page 35: ...for use All subsequent measurements will be compensated to 25 C 77 F If the instrument will not calibrate refer to the Probe Maintenance and Cleaning section on page 46 If the HI8936 is not used in c...

Page 36: ...t the probe is connected to the meter securely by aligning the pins with the socket pushing the plug in and tightening the threaded ring Insert the probe into the sleeve With the conductivity probe in...

Page 37: ...temperature compensated conductivity measurement Allow a few minutes if there is a temperature difference of about 5 C 9 F or more for the ATC circuitry to compensate completely When the reading stabi...

Page 38: ...00 100200 4429 20 68 11670 1278 76 72400 102100 4523 21 69 8 11910 1305 78 74000 104000 4517 22 71 6 12150 1332 79 75200 105900 4711 23 73 4 12390 1359 81 76500 107900 4805 24 75 2 12640 1386 82 78300...

Page 39: ...eysandcanbeusedtoisolatethe cause of malfunction Press the MEASURE key before proceed ing the following tests A Test Offset Press the TEST OFFSET key and the display should indicate the following valu...

Page 40: ...play should indicate the following values HI8931 100 0 mS 35 0 mS HI8931 10 00 mS 3 50 mS HI8931 1000 S 350 S HI8931 100 0 S 35 0 S Note The reading obtained by these functions will vary if the OFFSET...

Page 41: ...mple 3 INSTALLATION EXAMPLES INSTALLATION EXAMPLES INSTALLATION EXAMPLES INSTALLATION EXAMPLES INSTALLATION EXAMPLES Some typical installation setups are shown in the following examples Example 1 Exam...

Page 42: ...42 Example 4 Example 5...

Page 43: ...1 N hydrochloric acid for about 30 minutes Heavier deposits may demand longer immersion periods Rinse the probe thoroughly with water prior to the reinstallation On reinstalling check the seals carefu...

Page 44: ...lution 500 mL HI 7033M 84 S cm calibration solution 230 mL HI 7034L 80000 S cm calibration solution 500 mL HI 7034M 80000 S cm calibration solution 230 mL HI 7035L 111800 S cm calibration solution 500...

Page 45: ...45 CONDUCTIVITY PROBES HI 7635 In line conductivity probe with 3 m 10 cable for HI 8936 only HI 7638 Conductivity probe for tank installation with 3 m 10 cable for HI 8936 or HI 943500...

Page 46: ...er dateofpurchase serialnumberandthenatureofthefailure Iftherepairisnotcoveredby the warranty you will be notified of the charges incurred If the instrument is to be returned to HANNA instruments firs...

Page 47: ...t is recommended to use anti static screwdrivers Unplug the instrument from the power supply before replacing the fuse External cables to be connected to the rear panel should end with cable lugs Toma...

Page 48: ...38 9940 Fax 603 5638 9829 Singapore Tel 6296 7118 Fax 6291 6906 South Africa Tel 011 615 6076 Fax 011 615 8582 Taiwan Tel 886 2 2739 3014 Fax 886 2 2739 2983 Thailand Tel 66 2619 0708 Fax 66 2619 0061...

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