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AccUView LED (1/2020)

Rev 2

8.3.2 Simple Communication

The AccUView LED can provide basic communications over simple programs such as the

Hilgraeve HyperTerminal that is included with most Microsoft Windows packages. The

user could also use Visual Basic or other programs. The default communication

parameters are 8 bits, no parity and 1 stop bit. These parameters may be changed in the

extended

CONFIG

menu.

The master computer will send out:

•

Byte #1 the attention character “

” in ASCII or

Hex

•

Byte #2 the address of the AccUView LED being queried

•

Byte #3 & 4 CR LF or 0D 0A in hex

The AccUView LED will respond with:

•

The same attention character “

” in ASCII or

Hex

•

The address of the AccUView LED

•

The Reading

•

The Unit (% T or ABS )

A sample communication would look like this:
(Master computer requesting a report from address #1)

: 1 CRLF

(AccUView LED set to address #1 Response)

:001 97.4 %T

8.3.3 Modbus Communication

Modbus communications is fully operational if the RS-485 option (Catalog #19851A) is

installed. The Modbus protocol communication information is covered in a separate

manual, Catalog #24570 and is available as a free download from our website at

www.hfscientific.com

8.4 AccUView LED with Flow Alarm (Model 28042)

This model of the AccUView LED has flow switch installed.

There is an additional menu in the configuration which gives you

the selection of ON or OFF.

A “Low Flow” occurs under 1 Liter/minute and if the flow alarm is

enabled will cause a screen indication. The flow alarm can act on

both the relays and the 4-20mA. Either relay, if set to Error will

change to an alarm state and the 4-20 mA signal will change o 0, 2

or 4 mA (selected by ERLV) unless it is set to OFF. A modbus

minutes of low flow to

actuate or restore. Please note that the flow alarm is not sold as an

option and cannot be added.

8.5 Remote Panel Meter (Catalog # 19609)

The remote panel meter allows for remote indication of the % T or ABS reading using the

4-20 mA loop. No external power is required as the meter is run off of the 4-20 mA

source.

Summary of Contents for 28042

Page 1: ...ransmittance Absorbance Monitor HF scientific 3170 Old Metro Parkway Ft Myers FL 33916 Phone 239 337 2116 Fax 239 332 7643 Toll Free 888 203 7248 E Mail HF Info Wattswater com Website www hfscientific com Catalog No 29173 1 2020 Rev 2 ...

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Page 3: ...sted and passed EN 61326 1 2013 Manufacturer s Name HF scientific inc Manufacturer s Address 3170 Old Metro Parkway Fort Myers Florida 33916 7597 Importer s Name Importer s Address Type of Equipment Process Turbidimeter Model No AccUView LED Part Numbers 28041 28042 with Flow Switch I the undersigned hereby declare that the equipment specified above conforms to the above Directives and Standards P...

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Page 5: ...ays 8 3 3 4 4 20 mA 8 4 0 Operation 9 4 1 Warm up 9 4 2 Routine Measurement 9 4 3 Security Access Feature 10 4 4 Initial Operation 10 5 0 Instrument Calibration 11 5 1 100 T Calibration 11 5 2 ABS Calibration 12 5 2 Calibration Error 13 6 0 Restore Factory Settings 14 6 1 Restoring Factory Settings 14 7 0 Instrument Configuration CONFIG mode 16 7 1 Selecting the Output O P 16 7 2 Setting the 4 20 ...

Page 6: ...ment 24 7 18 Saving Configuration Settings 25 8 0 Additional Features and Options 26 8 1 Backlit LCD 26 8 2 Ultrasonic Cleaning 26 8 3 RS 485 Output 26 8 3 1 HF Online 26 8 3 2 Simple Communication 27 8 3 3 Modbus Communication 27 8 4 Flow Alarm 27 8 5 Remote Panel Meter 27 9 0 Routine Maintenance 28 9 1 Cleaning the Flow Through Cuvette 28 9 2 Replacing or Installing the Desiccant Pouch 28 9 3 Re...

Page 7: ...i with integral pressure regulator Flow Rate 100 ml min 1 5 liter min 026 40 Gal min Operating Temperature 0 C 50 C 32 F 122 F Wetted Materials Nylon Quartz Silicone Polypropylene Stainless Steel Sample Temperature Range 0 C 50 C 34 F 122 F Power Supply 100 240 VAC 47 63 Hz 80VA Insulation Rating Double Insulated Pollution Degree 2 Overvoltage Category II Environmental Conditions Not recommended f...

Page 8: ...ld Terminal Box Flow Through Assembly 1 Instruction Manual 1 Desiccant Pack 1 Quartz Cuvette with Ultrasonic Transducer Single Pack 1 100 T Calibration Standard 1 Tubing Kit 1 Note Tubing Kit includes 1 shutoff clamp 1 backpressure valve 2 connecting tubings with fittings for flow through assembly 1 drain vent screw used in pressurized systems Refer to Figure 4 Remove the instrument from the packi...

Page 9: ...the use of access code and offset mode In addition mode arrows 4 are used to indicate the current instrument operating mode AUTO normal operation CAL calibration and CONFIG configuration Figure 1 Display used in the instrument All items used on the display are shown in this figure 1 3 The Touch Pad Figure 2 illustrates the touch pad The touch pad has four buttons MODE EXIT and The MODE EXIT button...

Page 10: ...0 Safety This manual contains basic instructions that must be followed during the commissioning operation care and maintenance of the instrument The safety protection provided by this equipment may be impaired if it is commissioned and or used in a manner not described in this manual Consequently all responsible personnel must read this manual prior to working with this instrument In certain insta...

Page 11: ...s at eye level The overall mounting dimensions of the instrument are shown in Figure 3 The recommended mounting screws are M6 for the instrument enclosure and M4 3 16 for the field terminal box The AccUView LED is designed to have the field terminal box cradled under the sensor portion of the instrument It is recommended that the field terminal box be mounted first and then the rest of the instrum...

Page 12: ...nstrument is equipped to be plumbed using 4 75 mm 3 16 ID 8 mm 5 16 OD flexible tubing Opaque tubing should be used if the tubing will be exposed to sunlight to prevent algae growth Model 28042 is equipped with a flow switch For this instrument the user connections are equipped with push to connect connections The suitable tubing is polymer or copper tubing with a inch OD These connectors cannot b...

Page 13: ...ections to the instrument are made through the field terminal box which should be located directly under the sensor portion of the instrument The connections are labeled within the terminal box and are self descriptive see Figure 5 Please follow all local and government recommendations and methods for installation of electrical connections to and between the instrument and other peripheral devices...

Page 14: ...hat power is disconnected prior to making connections For ease of connecting remove the plug in terminal block Connections are labeled beneath this termination 3 3 3 Relays The Alarm 1 and Alarm 2 relays are mechanical relays rated at 240 VAC 2A Please note that the relays are labeled NO Normally Open NC Normally Closed and C Common As these alarms are configured fail safe the normal condition is ...

Page 15: ...the configuration or CONFIG menu Refer to section 7 14 Lamp Duty Cycle 4 1 Warm up Upon power up the AccUView LED will require a warm up period of about 30 minutes For improved accuracy allow the AccUView LED to compete warm up time prior to calibrating During the warm up period the display may flash indicating that it has detected a temperature change It is normal for this to occur during the war...

Page 16: ...he access code and finish with the button If the valid access code has been selected the instrument will be directed to the calibration mode If the CONFIG mode is needed push the MODE EXIT button one more time If the wrong access code is selected the instrument will return to the AUTO mode Refer to section 7 6 Enabling the Security Access for more information 4 4 Initial Operation It is recommende...

Page 17: ...in the calibration mode the instrument has a time out feature that automatically returns the system operation to the AUTO mode after a fifteen 15 minute period of inactivity 5 1 100 T Calibration Before starting the calibration procedure be sure to turn off the instrument s ultrasonic cleaning option See section 7 10 for instructions 1 Select the calibration function of the instrument by pressing ...

Page 18: ...d reinstall the filled cuvette on the flow through unit 5 Wipe flow through unit dry install and lock in place 6 Press the button to start the calibration 7 The upper display will count down the progress of the calibration step 8 The instrument will return to AUTO mode at the end the calibration 9 The shutoff clamp should now be released to restore sample flow 10 Do not move flow head after calibr...

Page 19: ...e flow through cuvette requires replacement Check the calibration fluid cuvette then recalibrate or restore the factory calibration see 6 1 Restoring Factory Settings The instrument cannot be used without performing one of these operations To recalibrate press the MODE key and start the calibration sequence again To restore the factory calibration push and hold the button Now push and release the ...

Page 20: ... a low lamp caused the problem he she can remedy the problem and recalibrate If all else fails the operator may restore the factory calibration and configuration settings by performing the following operation Push and hold the button Now push and release the then release the button Factory calibration and factory configuration have now been restored Restoring the factory settings allows the use of...

Page 21: ... by pressing the MODE EXIT button until the arrow beside CONFIG is illuminated then press the button To exit the CONFIG mode press the MODE EXIT button 7 1 Selecting the Output O P The first configuration selection is the O P The selections are 1 4 20 for the 4 20 mA output 2 485 for the RS 485 and modbus 3 OFF if no outputs are required Select the desired output by using the and buttons Once the ...

Page 22: ...r row of the LCD display Select the T level to assign to the 20MA using the and buttons Once the desired level has been set press the button to accept it The factory default setting for T is 100 T and for ABS is 2 The 20 MA cannot be set lower than the 4 MA level 7 2 3 Setting the Error Level In case of an error in the AccUView LED the 4 20 mA reading can be used to indicate a problem by sending t...

Page 23: ...e The factory setting is 9600 baud Press the button to continue on and select the desired instrument address using the or buttons Once the selection is satisfactory press the button 7 3 2 Setting the Address The last selection is the address This Address is important where multiple instruments are wired on a single string Each instrument MUST have a unique Address The factory setting is Address 1 ...

Page 24: ...e range of the instrument in steps of 0 01 NTU Alarm Delay Time The alarm delay times are used to prevent ringing of the alarm when the measured T or ABS level is close to the set point The function of the delay times is as follows Delay On The T or ABS level must exceed the alarm set point continuously for at least this number of seconds before the alarm activates If the delay on time is set at 5...

Page 25: ...s alarm using the and buttons Once the desired delay time has been set press the button to accept it Delay Off Next the following display will appear to select the number of seconds currently set for the delay off time The current selected number of seconds will be shown Select the desired delay off time for this alarm using the and buttons Once the desired delay time has been set press the button...

Page 26: ...re information on this security feature The security key icon will be visible and flashing on the display whenever the access option is selected using the or buttons On or OFF 7 6 Extended Settings The last few settings are grouped together to prevent them from being adjusted by accident To gain access to the extended settings select On using the or buttons and press the button 7 7 Units Select th...

Page 27: ... setting is 10 the last 9 readings are averaged with the current reading 7 9 LCD Backlight Brightness The LCD backlight brightness may need to be adjusted This is of particular interest if multiple instruments are located in the same area and it is desired for the entire group to have the same appearance Ten levels are available The factory brightness is 8 Change the brightness by pressing the or ...

Page 28: ...p Bits For stop bits the choices are 1 or 2 stop bits The default selection is 1 stop bit Make a selection using the and buttons then press the button The factory setting is 1 stop bit 7 14 Duty Cycle This determines how often the lamp turns on and updates the reading The lamp will operate for 1 second each time to obtain readings Updates can be set from 4 seconds to 60 seconds The factory setting...

Page 29: ...rst menu outputs a constant 4 mA while allowing for a small amount of adjustment The adjustment can be made using the and buttons This adjustment will allow the operator to make the AccUView LED agree with a PLC or SCADA system The adjustment limits are 200 counts or about 0 2 mA This setting will be slightly different on each instrument as each AccUView LED will be factory set to 4 00mA Press the...

Page 30: ...ter the last menu of the extended settings pressing the button will save all settings and the AccUView LED will automatically return to the normal AUTO mode of the instrument The CONFIG menu may be used at any time to reset or change any of the parameters The CONFIG menu may be exited at any point in the menu by using the MODE EXIT key Any features that have been modified will be saved While the o...

Page 31: ...A If the correct cuvette is installed and the error is still posted try rotating the flow through unit slightly to improve the connection If this fails to work the cuvette may have to be replaced Catalog 24232S The detection for this cuvette only operates in AUTO mode If the system is operating correctly AUTO will flash After installing a cuvette there will be a 30 minute period where the ultrason...

Page 32: ...is fully operational if the RS 485 option Catalog 19851A is installed The Modbus protocol communication information is covered in a separate manual Catalog 24570 and is available as a free download from our website at www hfscientific com 8 4 AccUView LED with Flow Alarm Model 28042 This model of the AccUView LED has flow switch installed There is an additional menu in the configuration which give...

Page 33: ...ouch will be required from time to time It is essential that the enclosure seal on the instrument base be maintained to ensure adequate desiccant life Inspect the seal each time the desiccant pouch is replaced Replace or reseat the seal if it is found to be defective The desiccant should be replaced when the instrument displays DESC A new sealed desiccant pouch and indicator card are available fro...

Page 34: ...ultrasonic transducer is not making contact or the flow through has been removed CLN If any of these conditions occurs both alarm relays will be activated and the 4 20 mA output will be held at 2 mA If any of these errors occur the instrument will still display readings however the accuracy is not known and the instruments readings should not be trusted A failure is a system fault This is NOT a pr...

Page 35: ...adings are lower than expected 1 Bubbles in solution 2 Condensate or leaky cuvette 3 Flow through cuvette dirty Instrument out of calibration 1 Ensure that the drain vent is open and is not obstructed See section 3 2 2 2 Apply backpressure See section 3 2 and figure 4 3 For sever cases of bubbles a stilling chamber is available Call HF scientific Part 20106 Check flow through cuvette for condensat...

Page 36: ...ent UV LED Assembly 28474 AccUView LED Version with Flow Alarm Factory Installed Provides an alarm if sample flow is interrupted 28042 Tubing Kit Containing 1 shutoff clamp 1 backpressure valve 2 connecting tubings with fittings for flow through assembly drain vent 21062 To order any accessory or replacement part please contact the HF scientific Customer Service Department If for any reason techni...

Page 37: ...cts resulting from repairs alterations or installation made by any person or company not authorized by HF scientific HF scientific assumes no liability for consequential damage of any kind and the original purchaser by placement of any order for the instrument or parts thereof shall be deemed liable for any and all damages incurred by the use or misuse of the instruments or parts thereof by the pu...

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