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ABB 7835, User Manual

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7835

Hydrazine Monitor

8 Troubleshooting

20

IM/7835–EN Rev. P

8 Troubleshooting

8.1 Diagnostics Classification Codes 

Diagnostic messages and icons conforming to the NAMUR NE107 classification code are used to define information during operation
– a typical diagnostic message is shown in Fig. 8.1.

8.2 Diagnostics Messages 

Fig. 8.1 Diagnostic Status Bar

CM30

80.0

20.0 

Deg. C

Hydrazine  µg/kg

In Recovery

In Recovery

Description of diagnostic 

or alarm tag.

The highest priority diagnostic 

or alarm is displayed. 

 Failure 

 Maintenance

 Out of Specification

 Check Function

NAMUR (NE107) 

Status Icons

Operator 

Page

 High Process Alarm 

 Low Process Alarm

Icon

Message

Possible Cause

Suggested Action

Comms Failed

Power supply unit has failed or cable between
transmitter and sensor unit is damaged.

Check wiring between transmitter and sensor
unit.

Check voltage across red and black wires is
approximately 24 V. If problem not resolved
contact local service organization.

Pt1000 Failed

Pt1000 has failed or the cable from sensor
terminal box to temperature sensor is broken.

Check wiring inside sensor unit. If problem not
resolved contact local service organization.

ADC Failed

Temporary or permanent failure of analog to
digital converter on the sensor terminal board.

Cycle power to device. If problem persists
replace sensor terminal board/contact local
service organization.

Invalid Setting

Switch in sensor terminal box is set incorrectly.

Ensure switch adjacent to the terminals in the
sensor terminal box is in the up position.

In Recovery

After a calibration has been completed the
alarms and analog outputs are held for the
duration of the recovery period to allow the
sample to stabilize to the normal measurement.

Message disappears automatically once the
recovery period has expired. Alarms and
analog outputs become active.

Last Cal. Failed

Calibration has failed.

Sensor needs replacing.

Temperature Hot

The temperature of the sample water has
exceeded 55 °C (131 °F).

Hydrazine concentration is held automatically
at the last known value. Normal measurements
are resumed when the temperature falls below
55 °C (131 °F).

Temperature 

Cold

The temperature of the sample water has fallen
below 5 °C (41 °F).

Hydrazine concentration is still displayed but a
fixed temperature compensation appropriate to
5 °C (41 °F) is applied.

Cal. Near Fail

Sensor approaching the end of its life and is likely
to fail soon.

Sensor (or system) requires attention soon.

Table 8.1 Diagnostic Messages

Summary of Contents for 7835

Page 1: ...User Guide IM 7835 EN Rev P 7835 Hydrazine Monitor ...

Page 2: ...r customers application expertise service and support worldwide We are committed to teamwork high quality manufacturing advanced technology and unrivalled service and support The quality accuracy and performance of the Company s products result from over 100 years experience combined with a continuous program of innovative design and development to incorporate the latest technology EN ISO 9001 200...

Page 3: ...4 7 Sensor Unit Sample Requirements 12 4 8 Sensor Unit External Pipe Connections 12 4 8 1 Inlet Pipe 12 4 8 2 Drain Pipe 12 5 Commissioning 13 5 1 Start Up 13 5 2 Sensor Unit 13 5 3 Setting Flowrates 13 5 3 1 Standard Solution Flowrate 14 5 3 2 Sample Flowrate 14 5 3 3 Sample Temperature 15 6 Programming 16 6 1 Operator Page and Keys 16 6 1 1 Access Level and Entering Passwords 16 6 2 Menus 17 6 2...

Page 4: ...ant Material Safety Data Sheets where applicable may be obtained from the Company address on the back cover together with servicing and spares information Protective earth ground terminal Functional earth ground terminal Direct current supply only Alternating current supply only Both direct and alternating current supply The equipment is protected through double insulation This symbol when noted o...

Page 5: ...d in the life cycle of electrical and electronic equipment In conformity with European local and national regulations EU Directive 2002 96 EC stated above electrical equipment marked with the above symbol may not be disposed of in European public disposal systems after 12 August 2005 The European Union RoHS Directive and subsequent regulations introduced in member states and other countries limits...

Page 6: ...ation starting or using the instrument please contact the company that sold it to you If this is not possible or if the results of this approach are not satisfactory please contact the manufacturer s Customer Service 1 12 Potential Safety Hazards The following potential safety hazards are associated with operating the analyzer Electrical line voltage Potentially hazardous chemicals Warning The ins...

Page 7: ...ansmitter can display measured hydrazine µg kg 1 and the sample temperature Set up of alarm retransmission and calibration parameters is achieved in programming mode where key parameters are protected by security codes Hydrazine values can be retransmitted to remote equipment using the retransmission output facility The values retransmitted are set automatically to the range selected Remote alarm ...

Page 8: ...re suitable for 8 mm 0 32 in diameter fasteners and are located as shown in Figs 3 1 and 3 2 page 7 Leave sufficient space in front of the cases for access and to the side for making cable connections to the transmitters 3 5 Overall Dimensions 3 5 1 Transmitter Unit Wall mounting is by 4 x 8 mm 0 32 in diameter fasteners on 230 x 230 mm 9 0 x 9 0 in centers see Fig 3 1 page 7 1 Unlock the door and...

Page 9: ...in Fig 3 1 Transmitter Unit Dimension and Installation detail Dimensions in mm in Fig 3 2 Sensor Unit Dimension and Installation Detail Gland Plate 300 11 8 200 7 9 230 9 0 230 9 0 8 5 0 3 10 0 4 300 11 8 195 7 7 190 5 9 105 4 1 20 0 8 20 0 8 68 2 7 115 4 5 Interconnecting Cable Gland Ground Earth Stud M6 300 11 8 230 9 0 6 4 mm 1 4 in O D Stainless 315 12 4 330 13 0 8 5 0 3 200 7 9 10 0 4 400 15 ...

Page 10: ...s must have basic insulation After installation there must be no access to live parts for example terminals Terminals for external circuits are for use only with equipment with no accessible live parts If the equipment is used in a manner not specified by the Company the protection provided by the equipment may be impaired All equipment connected to the transmitter s terminals must comply with loc...

Page 11: ...ock Individual terminal blocks can be unplugged from the terminal board pins if required 4 Pass the remaining cables through the glands Prepare the cable ends and attach them to the terminal blocks as shown in Fig 4 3 Make earth ground connections to the stud terminal on the bottom of the transmitter unit Warning Isolate the transmitter from power supplies before removing the cover Fig 4 2 Transmi...

Page 12: ...nsist of 4 1 4 watt resistors Connect the network as shown in the two examples in Fig 4 4 A recorder with suitable voltage and resistance inputs can be provided by ABB The recorder provides 60 scale deflection for Range 1 and 70 scale deflection for Range 2 Ensure other arrangements are designed to suit the requirements of the system Ensure that all external equipment is set up and working accordi...

Page 13: ...ies provided Make earth ground connections to the stud terminal on the bottom of the transmitter unit Fig 4 6 Sensor Unit Cable Gland Entries and Electrical Connections B R SCR G W 7 8 31 33 35 32 34 36 Terminal Box Connections B 0V Black R 24V Red SCR Screen G Tx Rx Green W Tx Rx White 7 24S Solenoid Valve 8 S Solenoid Valve 31 Hydrazine Sensor Red 32 Hydrazine Sensor Blue 33 Pt1000 Temperature S...

Page 14: ...icient wall thickness to withstand the highest sample pressure and the pipe lengths must be kept short Bend the inlet pipe to a right angle outside the case to allow removal of the liquid handling panel when required An isolator valve not supplied is necessary in the sample inlet line to the sensor unit 4 8 2 Drain Pipe The drain from the split tundish at the bottom of the sensor unit case consist...

Page 15: ...with the pipework carrying the sample mounted on a panel bolted to the back with 4 x M6 captive bolts Sample enters through a grommet in the bottom of the case and travels to a constant head unit via the sample inlet coupling From there it flows to a solenoid operated changeover valve that when energized during the calibration sequence see Section 4 page 8 replaces the sample with a standard solut...

Page 16: ... 1 page 15 and for the calibration sequence in Fig 5 2 page 15 2 The flow rate of sample from the constant head unit through the sensor can now be checked Ensure that sample is flowing through the sensor i e CAL is not displayed and the solenoid valve is de energized Read the temperature of the sample and refer to Table 5 1 Wait ten minutes for the temperature to stabilize Measure the flow rate wi...

Page 17: ...ration is still displayed but a fixed automatic temperature compensation appropriate to 5 C 41 F is applied The temperature is required to determine the necessary sample flow from Table 5 1 page 14 when setting up the monitor Fig 5 1 Sample System During Normal Operation Flow Diagram Outlet Valve Filler Cap Outlet Valve Filler Cap Boyle Mariotte Tubes Reagent Dosing Chamber Microporous Disc Adjust...

Page 18: ... to the Operator page from Access Level press Fig 6 1 Operator Page and Keys CM30 80 0 20 0 Deg C Hydrazine µg kg In Recovery Bargraph Access Level Icon Front Panel Keys see below 1 Navigation left key 2 Reserved for future enhancements Active Alarm Icons Process Temperature Hydrazine Reading a b c 2 4 3 Up Down keys navigate up down menus and increase decrease displayed values 4 Navigation right ...

Page 19: ...g output range Automatic In automatic mode the analog outputs switch between high and low ranges automatically Low Range The analog output is fixed at 0 to 100 µg kg 1 and the Low Range alarm is activated at this value High Range The analog output is fixed at 0 to 1000 µg kg 1 and the High Range alarm is activated at this value Security Setup Used to set password access to the Standard level and r...

Page 20: ...lay condition when an alarm is activated Failsafe The relay is de energized normally closed when an alarm is activated Non Failsafe The relay is energized normally open when an alarm is activated Displays read only factory set parameters for the transmitter and sensor Trip Point Process Variable Alarm On Alarm Off Alarm On Alarm Off High Process Low Process Menu Device Info Exit Select Transmitter...

Page 21: ...ard Solution value press and proceed to step 3 in Section 7 3 7 3 Setting the Standard Solution Value To set the Standard Solution value 1 At the transmitter enter the Standard access level and at the Calibrate menu press A list of calibration parameters is displayed Calibrate Sensor Calibration Standard Solution Restore Defaults 2 Use the keys press to highlight the Standard Solution option and p...

Page 22: ...ocal service organization ADC Failed Temporary or permanent failure of analog to digital converter on the sensor terminal board Cycle power to device If problem persists replace sensor terminal board contact local service organization Invalid Setting Switch in sensor terminal box is set incorrectly Ensure switch adjacent to the terminals in the sensor terminal box is in the up position In Recovery...

Page 23: ...empty contents rinse with high purity water and refill with reagent Clean up any spillages and do not top up container 2 Perform a calibration as described in Section 4 9 2 2 Six Monthly 1 Replace tubing if stained or age hardened see Section 9 2 3 page 22 2 Replace the porous disc as follows a Close the sample isolator valve to the monitor b Close the outlet valve on the reagent solution containe...

Page 24: ...ose the sample isolator valve and allow the sensor unit liquid handling system to drain 2 Place absorbent tissue at the bottom of the case to soak up any spillages 3 Close the outlet valve on the reagent container 4 Note the arrangement in the support bracket remove the sensor overflow drain tube and constant head unit feed tube and two drain tubes 5 Cut 0212 156 460 mm 18 11 in in half and fit to...

Page 25: ...lectrical connection box 20 Refurbish the sensor as required Follow the procedure in Section 9 4 5 page 25 21 Follow the procedures in Section 5 1 page 13 from step 3 onwards 9 3 Shut down Procedures 9 3 1 Sensor Unit If the monitor is to be shut down for longer than 1 week perform the following procedure 1 Turn the sensor plugs located on the side of the liquid handling panel a half turn anti clo...

Page 26: ...a loud click is produced when the calibration is initiated and that the standard solution is flowing through the sensor 3 Check that the standard solution value entered into the monitor is correct for the solution used 4 Check the sodium hydroxide solution dosing by measuring the pH of the sample flowing through the sensor it must be at least 10 5 5 Check that the two electrodes are clean The silv...

Page 27: ...by pulling them from the sockets 3 Carefully pull the hydrazine sensor out of its mounting clips on the sub panel 4 Holding the sensor over the drain tundish pull off the sample inlet tube and let the tube and sensor drain Leave the end of the inlet tube dipping into the tundish 5 Carefully dismantle the sensor as detailed below and wash the components thoroughly to remove all traces of gel 6 Clea...

Page 28: ...r connect a current source plus a resistance box to the transmitter To perform a simulated calibration proceed as follows 1 Open the sensor unit door and locate the electrical connection box mounted on the door see Fig 4 6 page 11 2 Open the connection box and disconnect the sensor and thermistor connections as follows 31 ve Sensor R 32 ve Sensor B 33 Pt1000 Y 35 Pt1000 Bk 3 Connect the appropriat...

Page 29: ...uick Blow 20 x 5 mm 1 7835 385 Hydrazine Sensor 1 0232 062 Solenoid Valve 1 7835 210 Constant Head Assembly 1 7835 355 Standard Solution Container 1 7835 350 Reagent Solution Container 1 7835 364 Nipple Outlet from Reagent Solution Container 1 7835 272 Nipple Outlet from Standard Solution Container 1 0211 068 O ring for Reagent Dosing Chamber 1 0211 002 O ring for Standard and Reagent Solution Con...

Page 30: ... Fail indication All volt free 250 V 2 A non inductive Calibration Manual initiation of automatic calibration sequence Every 1 to 4 weeks depending on operating conditions Environmental data Transmitter and sensor Ambient temperature 0 to 55 C 32 to 131 F Storage temperature 20 to 70 C 4 to 158 F Operating humidity Up to 95 RH non condensing Sunlight Store and operate out of direct sunlight Instal...

Page 31: ...26 0 008 in signal 24 0 2 mm 0 94 0 008 in Electrical connection Via 6 glands fitted to gland plate Power supply requirements 85 to 265 V AC 50 60 Hz 50 VA Remote range indication 2 volt free contacts rated 250 V AC 2 A non inductive EMC Emissions Conforms to EN61326 1 2006 Design and manufacturing standards CE mark Electrical safety BS EN 61010 1 2001 DS 7835 EN Rev H ...

Page 32: ...7835 Hydrazine Monitor Notes 30 IM 7835 EN Rev P Notes ...

Page 33: ...7835 Hydrazine Monitor Notes IM 7835 EN Rev P 31 ...

Page 34: ...7835 Hydrazine Monitor Notes 32 IM 7835 EN Rev P ...

Page 35: ... Analytics Instrumentation pH Conductivity and Dissolved Oxygen Transmitters and Sensors Ammonia Nitrate Phosphate Silica Sodium Chloride Fluoride Dissolved Oxygen and Hydrazine Analyzers Zirconia Oxygen Analyzers Katharometers Hydrogen Purity and Purge gas Monitors Thermal Conductivity Customer support We provide a comprehensive after sales service via a Worldwide Service Organization Contact one...

Page 36: ... or modify the contents of this document without prior notice With regard to purchase orders the agreed particulars shall prevail ABB does not accept any responsibility whatsoever for potential errors or possible lack of information in this document We reserve all rights in this document and in the subject matter and illustrations contained therein Any reproduction disclosure to third parties or u...

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