B&C Electronics IC 7685 Instruction Manual
CERT. N. 9115 BCEL
OPERATOR’S MANUAL
UNI EN ISO 9001:2000
IC 7685
ION CONCENTRATION CONTROLLER
MICROPROCESSOR BASED
Rev. B
Valid for Option 091.3711
Scales: 10.00/100.0/1000 PPM
Temperature scale: -10/+110 °C
Power supply: 110/220 Vac
Software: R2.1x
B&C Electronics Srl – Via per Villanova 3 – 20040 Carnate (Mi) – Italy P.IVA 00729030965
Tel +39 039 631 721 – Fax +39 039 607 6199 bc@bc-electronics.it - www.bc-electronics.it
B&C Electronics IC 7685 - Rev. B
1 FEATURES .................................................................................................................................. 3
2 SPECIFICATIONS....................................................................................................................... 4
2.1 FUNCTIONAL SPECIFICATIONS ................................................................................... 4
2.2 TECHNICAL SPECIFICATIONS...................................................................................... 6
2.3 PHYSICAL SPECIFICATIONS......................................................................................... 9
3 SOFTWARE DESCRIPTION.................................................................................................... 10
3.1 KEYBOARD ..................................................................................................................... 10
3.2 READOUT SEQUENCES ................................................................................................ 11
3.3 CALIBRATION SEQUENCES ........................................................................................ 16
3.3.1 Manual/automatic mode ................................................................................................. 16
3.3.2 Ion Selective Electrode Calibration ................................................................................ 17
3.3.3 Electrodes drift adjustment ............................................................................................. 21
3.3.4 Temperature calibration .................................................................................................. 22
3.3.5 Thermocompensation parameters ................................................................................... 24
3.3.6 Alarm calibration ............................................................................................................ 25
3.4 CONFIGURATION .......................................................................................................... 27
3.4.1 Keyboard locked/unlocked ............................................................................................. 27
3.4.2 LCD display contrast ...................................................................................................... 28
3.4.3 Set-point A/B calibration................................................................................................ 28
3.4.4 Access number ................................................................................................................ 30
3.4.5 Ion valence ...................................................................................................................... 31
3.4.6 Measuring unit ................................................................................................................ 32
3.4.7 Set-point scale, alarm and analog output........................................................................ 32
3.4.8 Software filter ................................................................................................................. 33
3.4.9 Scale of the analog output n°1 ........................................................................................ 34
3.4.10 Analog output n°1 range................................................................................................. 34
3.4.11 Scale of the analog output n°2 ........................................................................................ 36
3.4.12 Analog output n°2 range................................................................................................. 36
3.4.13 Set-point A function ....................................................................................................... 38
3.4.14 Set-point B function........................................................................................................ 38
3.4.15 Set-point A alarm............................................................................................................ 39
3.4.16 Set-point B alarm............................................................................................................ 40
3.4.17 Alarm relay contact......................................................................................................... 41
3.4.18 New access number ........................................................................................................ 41
4 INSTALLATION ....................................................................................................................... 43
4.1 CONTROLLER INSTALLATION................................................................................... 43
4.2 SENSOR INSTALLATION.............................................................................................. 43
4.3 ELECTRICAL INSTALLATION..................................................................................... 43
5 OPERATING THE SYSTEM .................................................................................................... 46
6 CALIBRATION.......................................................................................................................... 49
7 PREVENTIVE MAINTENANCE.............................................................................................. 50
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B&C Electronics IC 7685 - Rev. B
1 FEATURES
* Input from Ion Selective Electrodes
* Selectable measuring unit (g/l mbar mg/l mmHg PPM)
* Measuring range from 0,01 to 1000 PPM
* Selectable scales 10,00 - 100,0 - 1000 PPM
* Autoranging
* 5 points calibration
* Temperature input from Pt100
* Temperature readout
* Automatic and manual Temperature compensation
* Alphanumeric back-lighted LCD
* Software filter on the readout
* Automatic and manual operation
* 0/20 mA or 4/20 mA programmable isolated output
* Dual set-points with hysteresis, delay and min/max programmable functions
* Min/max and set-points timing alarm relay
* Software:
- 3 access levels
- user friendly
- keyboard lock
- access code
- watch-dog
* EEPROM parameter storage
* Automatic overload protection and reset
* Extractable terminal blocks
* 96X96 (1/4" DIN) housing
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B&C Electronics IC 7685 - Rev. B
2 SPECIFICATIONS
2.1 FUNCTIONAL SPECIFICATIONS
Input
The instrument accepts input from an Ion Selective Electrode.
A second input is provided for 2 or 3 wires Pt100 RTD Temperature.
Software filter
The unit is provided with a programmable software filter, to be inserted when the readout is not
stable.
The user may select different filter values for small and large signal fluctuations.
Calibration
First calibration carried out by standard solutions (from 2 to 5 concentration values) is necessary.
One point calibration may be performed in order to correct the Reference electrode drift during the
regular operation.
Temperature compensation
The unit is supplied with manual or automatic Temperature compensation. The instrument detects of
the absence or malfunctioning of the Temperature sensor and automatically switches to manual
compensation.
Analog output
Either a 0/20 mA or 4/20 mA programmable and isolated output may be selected, for use as an
interface with computers or data loggers.
The input range corresponding to the output is programmable.
Control relays
The monitor is equipped with two SPDT control relays.
Each control relay may be programmed for set-point, high/low, hysteresis or delay time actuation.
The full display indicates the current settings and current status of each relay.
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B&C Electronics IC 7685 - Rev. B
Alarm relay
The unit contains a third SPDT relay designated as an alarm relay.
This relay may be used to warn of conditions that may indicate operational problems.
The relay will activate on either high/low value conditions, or on failure of the control relays to
maintain proper control.
In addition this relay may be programmed for either normal or fail-safe operation.
Operating mode
The instrument is provided with 2 programmable modes of operation.
- Automatic operation:
The Automatic mode is the normal operation mode of the unit.
- Manual operation:
This mode of operation would normally be used for control system troubleshooting.
The unit will allow the relays to be manually actuated by pushing up/down keys.
The letter "M" flashing on the display, indicates the instrument is in manual operation mode.
Configuration
A number of programming functions are provided in the Configuration menu and are protected by a
selectable access number, which must be entered to allow changes in this setting.
The keys on the front panel of the monitor can be used for both changing the display and for
calibrations and set-point adjustments.
When the monitor is shipped, all functions are accessible.
However, the adjustment and calibration functions may be locked in order to prevent unauthorized
adjustments to the instrument.
Options
091.3711 Dual isolated and programmable output.
Two outputs may be configured for Concentration or Temperature.
091.701 RS232 isolated output.
The output sends the data (Concentration, mV, °C) to the serial port of the
computer.
091.404 24 Vac power supply.
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B&C Electronics IC 7685 - Rev. B
2.2 TECHNICAL SPECIFICATIONS
The Default values are correspondent to the factory calibration values.
Parameters marked by " * " can be modified in the Configuration procedures.
OPERATING MODE Default
Automatic/Manual Auto
CONCENTRATION Default
Input: ISE electrodes
* Ion type: -2/-1/+1/+2 X+
* Measuring unit: g/l mbar mg/l mmHg PPM PPM
Measuring range: 5 decades from 0.01 to 1000 PPM
* Scales: 10.00 - 100.0 - 1000 PPM autoranging 100.0PPM
Calibration: min. 2 points / max. 5 points
1 point calibration: ± 100.0 mV 0.0 mV
Range: ± 1100.0 mV
Software filter 90% Response Time:
* Large signal changing (>10.0mV): 0.4"/20.0" 2.0"
* Small signal changing (<10.0mV): 0.4"/20.0" 10.0"
TEMPERATURE Default
Input: RTD Pt100
Connection: 2/3 wires
Measuring and compensation range: -10.0/110.0 °C
Resolution: +/- .1 °C
Zero adjustment: +/- 2°C 0°C
Manual Temperature compensation: -10/110°C 20°C
THERMOCOMPENSATION Default
Thermocompensation: On/Off Off
Isothermal point: -999.9mV/+999.9mV 0.0 mV
Thermocompensation coefficient: 0.0/1.000%/°C 0.198%/°C
Compensation range: -10/110°C
Reference Temperature: 20 °C
SET POINT A/B Default
Action: ON-OFF
Set point value: 0/1000 0.0PPM
Hysteresis: 0/100 0.0PPM
Relay delay: 0.0/99.9 sec 0.0 sec
* Function: HI/LO (Max/Min) LO
Relay contacts: SPDT 220 V 5 Amps Resistive load
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B&C Electronics IC 7685 - Rev. B
ALARM (C-D) Default
Low value: 0/1000 0.0PPM
High value: 0/1000 100.0PPM
Delay: 0.0/99.9 sec 0.0 sec
* Contact type: ACT/DEA ACT
* Alarm on max. SA: ON/OFF OFF
* Max. time SA: 0/60 minutes 60 m
* Alarm on max. SB: ON/OFF OFF
* Max. time SB: 0/60 minutes 60 m
Relay contacts: SPDT 220 V 5 Amps Resistive load
ANALOG OUTPUT Nr. 1 Default
* Scale: PPM/°C (option 091.3711) PPM
* Range: 0-20/4-20 mA 0-20 mA
Scale PPM:
* Point 1 (out mA min.): 0/1000 0.0PPM
* Point 2 (out mA max.): 0/1000 100.0PPM
Scale °C: (option 091.3711)
* Point 1 (out mA min.): -10.0/110.0°C -10.0°C
* Point 2 (out mA max.): -10.0/110.0°C 110.0°C
Response time: 2.5 sec. for 98%
Isolation: 250 Vca
R max: 600 Ohm
ANALOG OUTPUT Nr. 2 (option 091.3711) Default
* Scale: PPM/°C PPM
* Range: 0-20/4-20 mA 0-20 mA
Scale PPM:
* Point 1 (out mA min.): 0/1000 0.0PPM
* Point 2 (out mA max.): 0/1000 100.0PPM
Scale °C:
* Point 1 (out mA min.): -10.0/110.0°C -10.0°C
* Point 2 (out mA max.): -10.0/110.0°C 110.0°C
Response time: 2.5 sec. for 98%
Isolation: 250 Vca
R max: 600 Ohm
SERIAL COMMUNICATION (option 091.701) Default
Baud Rate: 4800 bit/s
Bit length: 8 bit
Nr. of Stop bit: 1
Parity: None
Isolated from measure circuits
Data frequency: 0.4 sec.
Example of data transmission:
' ±1000.0 mV 100.0 PPM ±100.0 °C '
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B&C Electronics IC 7685 - Rev. B
CONFIGURATION (*) Default
Free calibration (Access code not required):
Keyboard locked/unlocked unlocked
LCD contrast (0/7) 4
Access code number required for:
Ion type: (X--/X-/X+/X++) X+
Measuring unit (g/l mbar mg/l mmHg PPM) PPM
Set point output scale: (10.00/100.0/1000) 100.0PPM
Large signal RT filter SW: (0.4/20.0) 2.0 sec
Small signal RT filter SW: (0.4/20.0) 10.0 sec
Output Nr.1 scale: (PPM/°C) (option 091.3711) PPM
Output Nr.1 range: (0/20 4/20) 0/20 mA
Point 1 (for 0 or 4 mA): (0/1000) 0.0PPM
Point 2 (for 20 mA): (0/1000) 100.0PPM
Output Nr.2 scale: (PPM/°C) (option 091.3711) PPM
Output Nr.2 range: (0/20 4/20) 0/20 mA
Point 1 (for 0 or 4 mA): (0/1000) 0.0PPM
Point 2 (for 20 mA): (0/1000) 100.0PPM
Relay A function: (LO/HI) LO
Relay B function: (LO/HI) LO
Alarm on max. operating time of SA: (ON/OFF) OFF
Max. operating time of SA: (0/60) 60 m
Alarm on max. operating time of SB: (ON/OFF) OFF
Max. operating time of SB: (0/60) 60 m
Alarm relay status: (ACT/DEA) ACT
Access number: 0/999 0
GENERAL SPECIFICATIONS
Alphanumeric display: 1 line x 16 characters
Acquisition time: 0/50°C
Humidity: 95% without condensation
Power supply: 110/220 Volt ac +/- 10 % 50/60 Hz
Isolation: 4000 V between primary and secondary (IEC 348)
Power: 5 VA max.
Terminal block: extractable
Weight: 850 gr.
Dimensions: 96 x 96 x 155 mm. (DIN 43700)
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B&C Electronics IC 7685 - Rev. B
2.3 PHYSICAL SPECIFICATIONS
The controller enclosure is designed for surface or panel mounting.
It consists of an anodized aluminium case built according to the standard DIN 43700, with an
aluminium panel coated with scratch-proof and non-corrosive polycarbonate membrane.
A transparent waterproof front door SZ 7601 can be added to the housing, in order to protect the
unit from excessive moisture or corrosive fumes.
Signal and power cable connections are made by using two special extractable terminal blocks
placed in the back of the instrument.
This makes wiring, installation and general maintenance of the probes and other devices easier.
The package is supplied complete with fixing clamps for panel-mounting.
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B&C Electronics IC 7685 - Rev. B
3 SOFTWARE DESCRIPTION
3.1 KEYBOARD
KEY FUNCTION
- it allows the operator to go to the next Display
- it allows to go back to the main Display. The eventual new
parameter values will not be memorized
ù
§
ò
ç
- it allows the access of calibration sequences
- it allows to increase the displayed parameters
- it allows to choose between different functions
- it allows to decrease the displayed parameters
- it allows to choose between different functions
- it allows to enter the selected data and to return to the main
Display D0
£
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B&C Electronics IC 7685 - Rev. B
3.2 READOUT SEQUENCES
Applying the power to the instrument the display will show the Ion selected for approximately 3
seconds, then will show the main display (D0).
X+ positive monovalent ion
(X++) positive bivalent ion
(X-) negative monovalent ion
(X--) negative bivalent ion
Press ù to visualize the following Display:
D0
ISE meter X+
xxx.xPPM ìAL ì BH
Concentration Value, set-point
status/functions
D1
D2
D3
D4
D5
D6
D7
PPM x point cal
xxx.x mV X++
TEMP.: xx.x°CM
Termos.: OFF
SA xxx.xPPM*à LO
SB xxx.xPPM*à HI
AL x.x/xxx.xpp
ISE calibration
mV supplied by ISE
Temperature value
Thermocompensation parameters
Set-point A parameters
Set-point B parameters
Alarm parameters
D8
D8bis
01 xx.xmA/xxx pp
02 xx.xmA/xxx pp
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Analog output Nr. 1/input values
Analog output Nr. 2/input values
B&C Electronics IC 7685 - Rev. B
D9
Configuration
Configuration display
D10
IC7685 R2.1x
Instrument P/N and software release
----------------------------------
(D0) Concentration value, set-point
status/functions
xxx.xPPM Concentration value
(>>>>) over range
(flashing values) alarm condition
(M flashing) manual operating mode
ì A relay A deactivated
(è A) relay A delayed
(à A) relay A activated
ì B relay B deactivated
(è B) relay B delayed
(à B) relay B activated
L minimum function (LO)
H maximum function (HI)
xxx.xPPMì ALM à BH
§ to activate the procedure of the manual/automatic mode selection
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B&C Electronics IC 7685 - Rev. B
ù to go to
----------------------------------
(D1) ISE calibration
x Number of memorized calibration points
§ to activate the calibration sequence
PPM x point cal
ù to go to
----------------------------------
(D2) mV supplied by ISE
xxx.x mV mV given by the electrode
X++ ion valence
xxx.x mV X++
ù to go to
----------------------------------
(D3) Temperature value
xx.x Temperature value
M manual value
§ to activate the Temperature calibration or the procedure of the manual
TEMP.: xx.x°CM
Temperature value selection
ù to go to
----------------------------------
(D4) Thermocompensation parameters
OFF thermocompensation deactivated
(ON) thermocompensation activated
TERMOC.: OFF
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B&C Electronics IC 7685 - Rev. B
§ to activate the thermocompensation parameters calibration
ù to go to
----------------------------------
(D5) Set-point A parameters
SA set-point A parameters
xxx.xPPM set-point value
à set-point A status (relay activated)
LO selected function (minimum)
* alarm function on set-point A is activated
§ to activate the set-point value, hysteresis and delay time programming sequences
SA xxx.xPPM*à LO
ù to go to
----------------------------------
(D6) Set-point B parameters
SB set-point B parameters
xxx.xPPM set-point value
à set-point B status (relay activated)
HI selected function (maximum)
* alarm function on set-point B is activated
§ to activate the set-point value, hysteresis and delay time programming sequences
SB xxx.xPPM*à HI
ù to go to
----------------------------------
(D7) Alarm parameters
AL Concentration values alarm (PPM)
x.x low alarm value
xxx.x actual high alarm value
AL x.x/xxx.xpp
§ to activate the alarm values programming sequences
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B&C Electronics IC 7685 - Rev. B
ù to go to
----------------------------------
(D8) analog output Nr.1/input values
01 selected analog output Nr.1
xx.xmA analog output value (mA)
xxx pp input measuring value (PPM)
(xxx°C) Temperature value (option 091.3711)
01 xx.xmA/xxx pp
ù to go to
----------------------------------
(D8BIS) analog output Nr.2/input values
02 selected analog output N°2 (option 091.3711)
xx.xmA analog output value (mA)
xxx pp input measuring value (PPM)
(xxx°C) Temperature value
02 xx.xmA/xxx pp
ù to go to
----------------------------------
(D9) Configuration display
§ to activate the programming sequences of keyboard lock/unlock, display
Configuration
contrast, visualization and modification of the instrument configuration
parameters
ù to go to
----------------------------------
(D10) Instrument P/N and software release
IC7685 R2.1x
ù to go back to the main display (D0)
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B&C Electronics IC 7685 - Rev. B
3.3 CALIBRATION SEQUENCES
The following procedures will be active whenever the instrument is not in the keyboard lock
condition.
To unlock the keyboard follow the procedures mentioned in the "Configuration" chapter.
The following procedures allow the sensor calibration, the set-point and alarm parameters
programming.
The sequence (1, 2, ....) helps the operator to following the regular calibration sequence.
IMPORTANT NOTE: during the calibration procedure the microprocessor turn the unit to the
main display if no keys have been pressed within 5 minutes (30 minutes for ISE calibration
sequences).
3.3.1 Manual/automatic mode
Normally the instrument works in automatic mode.
Follow this procedure to change operating mode Automatic/Manual.
1.
(D0)
2.
AUTO automatic mode
(MANUAL) manual mode
3.ò ç to select the operating mode
ù to go to
xxx.xPPM ìAL ì BH
§ to access the operating mode selection
CAL MODE: AUTO
ù to go back to (DO)
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