YOKOGAWA DO400 User manual

Instruction
Manual MODEL 00400
Dissolved Oxygen
Converter
EX
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YOKOGAWA + 1M 12J681-E-H
3rd Edition, April 1994

CONTENTS
Chapter Description ......... ... ...... ... ...... .......... ..... .... ...... ....... .......... ... .....-.... .... Page
COMPONENT DESCRIPTION AND CONTROLS .................................................... Front cover
CONTENTS ............................................................................... . Front cover
1. INTRODUCTION
1-1. Application .....................................................................................
1-2. Required components for DO measurement .............................................................
2. TECHNICAL SPECIFICATIONS
2-1. General technical specifications ...................................................................... 2
2-2. Functional description ............................................................................. 3
2-3. Functional description of the EXA 00400 instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4
3. INSTALLATION AND WIRING
3-1. Installation and dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5
3-2. Opening the instrument ............................................................................ 7
3-3. Wiring of power supply ........................................................................... 10
3-4. Wiring of output signals and contacts ................................................................. 11
3-5. Wiring of sensors ............................................................................... 12
4. COMMISSIONING
4-1. Operation overview.............................................................................. 15
4-2. Setpoints adjustment ................................. SETPOINTS ............................... 16
4-3. Output range adjustment .............................. RANGE................................... 18
4-4. Set up HOLD function ............................... SET HOLD ................................ 20
4-5. Activating the WASH timer ............................ WASH.................................... 22
4-6. Sensor selection and diagnostics .................................................................... 25
5. MAINTENANCE
5-1. Air calibration ......................................
5-2. Water calibration ....................................
5-3. Manual calibration ...................................
5-4. Selecting a value to display ............................
5-5. Hold during maintenance ..............................
AIR CAL ..................................
H20.CAL .................................
MAN CAL .................................
DISPLA Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HOLD................................... .
26
28
30
32
34
6. TROUBLE SHOOTING
6-1. Introduction .................................................................................... 37
6-2. Error messages and their meaning ................................................................... 38
7. SERVICE (Specialized routines) SERVICE 40
USER DATA SETTINGS
Stickers .................................................................................... Back cover
1M 12J6B1-E-H

CONTENTS
Chapter Description . ...... 0' ............... .0'. O' .0. ..................... 0'. .0. ........ ................... '0' .... O. O. Page
COMPONENT DESCRIPTION AND CONTROLS .................................................... Front cover
CONTENTS ............................................................................... . Front cover
1. INTRODUCTION
1-1. Application .....................................................................................
1-2. Required components for DO measurement .............................................................
2. TECHNICAL SPECIFICATIONS
2-1. General technical specifications ...................................................................... 2
2-2. Functional description ............................................................................. 3
2-3. Functional description of the EXA 00400 instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4
3. INSTALLATION AND WIRING
3-1. Installation and dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5
3-2. Opening the instrument ............................................................................ 7
3-3. Wiring of power supply ........................................................................... 10
3-4. Wiring of output signals and contacts ................................................................. 11
3-5. Wiring of sensors ............................................................................... 12
4. COMMISSIONING
4-1. Operation overview.............................................................................. 15
4-2. Setpoints adjustment ................................. SETPOINTS ............................... 16
4-3. Outut range adjustment .............................. RANGE................................... 18
4-4. Set up HOLD function ............................... SET HOLD ................................ 20
4-5. Activating the WASH timer ............................ WASH.................................... 22
4-6. Sensor selection and diagnostics .................................................................... 25
5. MAINTENANCE
5-1. Air calibration ......................................
5-2. Water calibration ....................................
5-3. Manual calibration ...................................
5-4. Selecting a value to display ............................
5-5. Hold during maintenance .............. .,. . . . . . . . . . . . . . .
AIR CAL ..................................
H20.CAL .................................
MAN CAL .................................
DISPLA Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HOLD................................... .
26
28
30
32
34
6. TROUBLE SHOOTING
6-1. Introduction .................................................................................... 37
6-2. Error messages and their meaning ................................................................... 38
7. SERVICE (Specialized routines) SERVICE 40
USER DATA SETTINGS
Stickers .................................................................................... Back cover
1M 12J6B1-E-H

OUTPUT
HOLD
FLAG FAIL
FLAG
-/888
""lUfH ~~~
MESSAGE
DISPLAY
KEY PROMPT
FLAGS (
/
SELECTION KEYS
YES: ACCEPT
SETTING
NO : CHANGE TO
NEW
SETTING
(
YES NO
)()
~1\
) ( )
\ .
ADJUSTMENT KEYS
::: CHOOSE DIGIT
FOR ADJüSTMENT
A: ADJUST DIGIT
(TO DECREASE PASS
THROUGH ZERO)
ENT: ENTER NEW
VALUE
MODE
SELECT MODE
MEASURE/MAINTENANCE
CAN BE USED
TO ESCAPE
PROGRAM AT
ANY TIME
MENU POINTER
FLAGS
*
CONTACT OUTPUTS
LEOS SIGNAL THE
STATUS OF THE CONTACTS
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MENU FOR
MAINTENANCE
FUNCTIONS
SEE CHAPTER 5
MENU FC'R
COMMISSIONING
FUNCTIONS
SEE CHAPTER 4
SELECT MODE
MEASURE/COMMISSIONING

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1. INTRODUCTION.
1-1. Application
The EXA 00400 is a mains powered
transmitter intended for use in industrial
outdoor or indoor installations. It has full rain
and dust protection even during
maintenance. It's small housing makes it the
ideal instrument for replacements in the field
or in existing panels. For best results the
sensor should be located in the vicinity of the
transmitter.
Power can be supplied from most AC or DC
sources. The four supply options make it a
real universal unit. As all operating
parameters are stored in non-volatile
memory there is no danger when power
drops occur. It also gives the user maximum
flexibility by programming the instrument in
advance and then installng it with the correct
parameters later. The instrument has several
safety procedures incorporated in the
softare. In addition to that a watch-dog
timer will always return the instument to the
normal operating status after heavy
interference or power drops.
The microprocessor in this instrument is
further used for continuous sensor diagnosis,
flexible on site commissioning, advanced
output relay functions and fine tuning..
In géneral a measuring loop for dissolved
oxygen in water can be set up for a number
of purposes:
To be part of a total process control
system (i.e. DC-system).
To indicate dangerous limits of a
process.
To monitor water quality.
To function as a simple controller for an
aerating system.
1-2. Some required components for a
dissolved oxygen measuring loop
A. a dissolved oxygen sensor with
integrated temperature sensor.
B. a fitting for the above sensor.
C. the EXA 00400 transmitter with
universal mounting bracket.
D. an AC or DC power supply (230, 110,
24 V AC or 24 V DC).
E. peripherals: e.g. strip-chart recorder,
panel indicator, PID-controller, PLC-
system or digital control system.
F. control equipment: e.g. aerator or air
injection system.
G. cleaning equipment.
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2. TECHNICAL SPECIFICATIONS
2-1. General technical specifications
A. Measuring Range:
DO
Temperature o - 20,0 mg/1.
o to 50°C (30 to 120°F)
B. Transmission Signals 0 - 20 mA DC or 4 - 20 mA
DC, isolated from input but not
from Voltage signal; maximum
load 6000.
2 0 - 1 V, isolated input but not
from mA signal; minimum load
1 kO.
C. Transmission Range both signals are user program-
mable within the measuring
range of DO and temperature
(OC/oF), a fixed span of the
temperature range is 50°C
(100°F).
both signals together can be
held (fixed or last value) during
main-tenance (e.g. calibration)
and wash.
D. Contact Outputs:
1. Alarm:
Contacts
Status
Alarming
2. Wash-Contact:
Status
1M 12J6B1-E-H
2 independent process or control
alanm contacts (S1, S2).
high and/or low alarm.
on/off alarm with adjustable
hysteresis and delay time.
t
predefined as a wash-timer with
adjustable wash, interval and
relaxation time for controllng the
wash cycle.
- reprogram mabie as an alarm
contact (S3).
3. FAIL Contact
Status
Notes
E. Contact Input
F. Power supply
Voltage
Consumption
G. Climatic Conditions:
Ambient temperature
Storage temperature
Relative humidity
Weather protection
signalling a fault of the
measuring loop.
all contacts are potential-free
SPST contacts.
- LED indicates for all contacts
(LED is on if the contact is
closed and power is on). Only
Fail contact is closed if power is
off.
- switch capacity:
250 V AC, 5 A max. 100 W.
250 V DC, 5 A max. 50 W.
suitable for a remote potential-
free contact triggeri ng of the
wash-cycle.
- contact open: no triggering if
impedance ;: 100 kO.
- contact closed : triggering if
impedance c: 10 0
110VAC (:t20%), 50/60 Hz.
230V AC (+ 15%/-20%), 50/60 Hz.
24V AC (:t20%), 50/60 Hz.
24V DC (-30%/+20%).
maximum 8,5 VA.
-10 to +55°C
(10 to 130 OF).
-30 to +70 °C
(-20 to 160 OF).
10t090%.
rain and dust-tight IP65,
(NEMA 4X).

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H. Display
Type
Main display
Message display
Flags
i. Keys
J. Housing:
Body material
Window
Colours
Cable glands
Terminals
K. Mounting possibilties
L. Shipping details
Dimensions
Package
Weight
M. Safety & Security:
Data protecton
Watchdog timer
Automatic safeguard
Interference tes:
Power down
3
Custom Liquid Crystal Display
3l digits; 12,5 mm high
6 alpha numeric characters; 7 mm high.
status indication
6 keys operated through flexible window
with tactile feedback + 1 access key
hidden behind the front cover.
cast aluminium with epoxy coating
flexible poly-carbonate
moss-green/off-white.
5 polyamide glands PG13.5
for maximum 2,5 mm2 cable
universal mounting kit available for
panel, wall or pipe mounting
- suitable for standard DIN sized panels
(144 x 144 mm)
144x144x131 mm
225 x 225 x 220 mm
approximately 2,5 kg
non volatile memory (EEPROM) manipu-
lation passcode protected
checking the microprocessor
return to measurl¡iment when no key is
pushed for 10 min.
EMI class B
- RFI less than 2% at 5 Vim for 0,1 to
1000 MHz. both tests according to
IEC 801.
no effect; reset to measurement.
2-2. Functional specifications
A. Input Specification:
current amplifier.
B. Calibration:
air and water calibration, zero
calibration.
C. Temperature measurement:
suitable for measurement with
temperature sensor depending on
sensor type
D. Temperature compensation:
automatic between -10 to + 50°C.
E. Salinity compensation:
according to ISO-5814 table.
F. Slope adjustment:
40 to 200 % of the sensitivity of an
ideal sensor.
G. Performance:
with simulated input
Accuracy Linearity Unit
Output 0,2 0,1 mgli or ppm
:t 0,02 mA
Temperature 0,1 0,1 °C or OF
:t 1 mV
1M 12J6B1-E-H

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c2.3. Functional description of the EXA
00400 instrument
The EXA 00400 is a real-time microprocessor
operated transmitter system. It uses a
dedicated micro-controller with exclusively
developed softare to perform all functions
necessary in such a system. The input and
output functions are concentrated in the
analogue section of the instrument. Even these
functions are operated through special
interfaces designed to give a minimum of
interference problems to the digital functions.
The digitl and logic functons, including the
energising of the output relays, are designed to
operate securely. The instrument features two
separate analogue output signals to industry
stndards.
The outut contacts are voltage-free relay
switches which can be used as simple process
alarms or to control a process. The EXA gives
you two pre-defined process alarms (one high,
one low), a wash contact and a "FAIL"-
contact. All contacts are signalled on the front
by red LED's.
The unique "FAll-contact gives a warning
when the system has found a fault in the
measuring loop. The wash-contact is designed
to control the cleaning of the sensor on site. It
is driven by the wash-timer.
By using non-volatile memory (EEPROM) for
the essential information the operating
parameters are fixed in memory without the
need for a battery.
1M 12J6B1-E-H
The softare for the EXA system is designed
with the user in mind. It uses a simple step by
step, question and answer style to
communicate with the operator by giving
messages on the second line of the display and
also indicating which keys should be pressed in
a special display field.
The user-interface is simplified to a basic set of
6 keys' accessible through the flexible window
cover. The keys are scanned continuously and
actions are taken immediately. An extensive
checking of limiting values and parameters is
implemented in the softare. When limits are
exceeded, an error message is shown on the
display and when significant for the reliability
the FAIL-contact is switched too.
The transmitter can be powered from AC or
DC voltages. The AC voltage has wide
tolerances (+ 15%/-20%) e.g. the 230 Volt
version can be powered from sources between
176 and 264 Volt at 50 or 60Hz.
The 24 Volt DC version is included to facilitate
mobile installation or powering from batteries.
The rugged housing is designed for outdoor
use (IP 65). In addition to that it is shaped in a
way that indoor panel mounting is also possible
(DIN size 144 x 144 mm). The optional
mounting brackets are used for all mounting
methods.
The commissioning of the instrument can be
performed on site or in advance. A three level
operating system keeps the approach clear and
distinguishes between every day operation and
maintenance against one time operations like
commissioning and fine-tuning. All this makes
the EXA 00400 operate like a normal
analogue transmitter with a number of
additional functions. These extra functions are
only possible by using a micro-controller at the
heart of the system.
FEATURES:
Built-in barometric air pressure compen-
sation
Simplified calibration in air or water
Simple range adaptation
Accurate temperature measurement with
Pt1 000
Accurate temperature compensation
algorithm
A HOLD function for the outputs
Output contacts for alarming or process
control
Dual analogue output signals: mA and mV
Built-in wash timer for cleaning purposes
Protection against unauthorized access to
the Maintenance, Commissioning or
Service level by a passcode.
Programmable salinity compensation.

3. INSTALLATION AND WIRING
3-1. Installation and dimensions
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3-1-1. Installation site
As the transmitter has full weather protection, it
can be installed outdoors as well as indoors. It
should, however. be installed within the distance
given by the cable length to the sensor.
Select an installation site where:
mechanical vibrations and shocks are
negligible;
no relay or power switches are in the direct
environment;
the transmitter is not exposed to direct
sunlight or severe weather conditions;
maintenance activities are possible (no
corrosive atmosphere).
The ambient temperature and humidity should be
within the limits of the specifications.
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3-1-2. Mounting methods
The EXA 00400 transmitter has universal
mounting possibilities:
Panel mounting using the optional brackets.
Wall mounting using th optional brackets.
First the brackets are fixed to the housing,
then put fixing screws through the brackets
into the wall.
Pipe mounting using the two optional
bracket, on a horizontal or vertical pipe
(diameter between 40 and 70 mm).
The following drawings show these mountilig
methos in detaiL.
5
PANEL MOUNTING 144(5.67)
~
144 *
(5.67) ~
M6 ~tI
24 1
(1)
'"
~
MOUNTING BRACKETS
Panel Cut-Out
and Spacing 16.5
(0.65)
~ ~5ni~ï5 -- CUT.OUT:: l38 x i 38 . tr$-
~.
T.. 0 .u'"'''''' 115.5
(4.55)
Minimum
195 (7.75)
100
Unit: mm (inches)
Figure 1.
1M 12J6B1-E-H

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(WALL AND PIPE MOUNTING: Unit:mm (inches)
Wall Mounting
T
0-1= --
144 (5.67)
200 (7.87) 0-1
0
L '" "'"
00
~
Pipe Mounting Pipe Mounting
(Vertical) (Horizontal)
/'::::
I-T
I I
I I
I I
I I
I --
I I
I II
Figure 2.
1M 12J6B1-E-H

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3.2. Opening the instrument
The procdure for opening the EXA 00400 is
described in the most convenient way. If
connections are to be made to the contact outputs
or power terminals the screening plate must be
removed. As the input terminals are located above
the output contact terminals. it is not advised to
connect wires to them with the input cables in
place.
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Therefore we recommend to use the following
sequence (see fig.3):
1. Remove the cover of the EXA 00400 by
loosening the 4 captive screws.
2. Swing the display board to the left like a door.
3. The upper terminal strip is now visible.
Remove the screen plate covering the lower
terminal strip.
4. Start by connecting the power and contact
outputs. See the instructions in §3-3 and
§3-4. Use the 3 glands at the back of the
housing (see fig.4).
5. Replace the screen plate over the lower
terminals.
6. Connect the analogue output and sensor
cables. See the instructions in §3-5. Use the
2 glands at the front of the housing (see fig.4).
7. Swing back the display board and switch on
the power. Commission the instrument to your
needs.
8. Close the instrument by refiting the cover.
7
HINGE
FRONT
(SEE INSIDE
COVER)
SCREWS
(4) GASKET
WINDOW
Figure 38.
1M 12J6B1-E-H

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Figure 3b.
1M 12J6B1-E-H
DIGITAL BOARD
WITH LCD
AND KEYS ANALOGUE
IN AND OUTPUT
TERMINAL
GLANDS (5)

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Glands to be used lor cabling
fl§ l§ I
Ii~ ! (§ : ~11'
i i I I I I
-,I
I
if i ~ L____n__
I : : L.__________
I i L.______
I i
i ..----l
--,I
,
I
I
,
I
Figure 4.
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Figure 5. Grounding
Figure 6. Glands
1M 12J6B1-E-H

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3.3. Wiring of the power supply
3-3-1. General precautions
Do not activate the power supply yet.
First make sure that the power supply
conforms to the specifications given (see §2
item F). Remove the front cover by
unscrewing the 4 captive screws. Then
check the type-plate on the instrument for
the correct supply voltage.
Local regulations may ask for an external
circuit breaker to be installed. The
instrument is protected internally by a fuse
with one of the following ratings:
230 V AC - 63mA, 24 V AC - 0.5A
110 VAC - 100mA 24 VDC - 1.0A
The internal fuse is located next to the
power terminals.
3-3-2. Access to the terminals
The terminals numbered 1, 2 and 3 from
the bottom connection strip are used for the
power supply. Guide the power cable
through the nearest gland in the housing.
The terminals accept wires of maximum 2.5
mm2. Use cable finishing if possible.
Connect the wires as indicated in the wiring
diagram (fig. 7).
Connect terminal 1 to the phase ("hot" line
of the AC power and terminal 2 to the zero
line. In case DC power is used, terminal 1
should be connected to the positive outlet
and terminal 2 to the negative outlet (see
fig.7).
Terminal 3 is for the power ground. This is
separated from input ground by a galvanic
isolation.
1M 12J6B1-E-H
3-3-2a. Grounding the housing
To protect the instrument against
interference the housing should be con-
nected to ground by a large area conductor.
This cable can be connected to the back of
the housing using a braided wire cable with
a lug. Put a shake proof washer under the
lug to improve the contact to the housing.
3-3.3. Switching the instrument on
After all connections are made and checked,
the power can be switched on from the
power supply. Observe the correct activation
of the instrument at the display. After lighting
all segments the EXA D0400 might display
an error E7, E8 and/or E9. In the case of E7
either the setting of the instrument will
display a value or the sensor connections
have to be checked. When E9 is displayed
the cell current is outside the range of 0 -20
¡i due to a load up of the celL. Wait some
minutes for stable value. If for any reason
this does not solve, consult the trouble
shooting section §6-1 before calling
Yokogawa service department.
After installation of the sensor it may need
several hours to stabilize readings.
Stabilisation can take up to 24 hours.
LE
I 1
o
Figure 7.
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3-4. Wiring of the output signals and
contacts
.
3-4-1. General precautions
The analogue output signals of the EXA
00400 transmits low power standard
industry signals to peripherals like control
systems or strip-chart recorders.
The contact output signals consists of
voltage-free relay contacts for switching
electrical appliances. They can also be
used as digital outputs to signal status to a
digital system or PLC.
The only contact input is for a remote
starting of the wash timer. see §3-5-4.
It is possible to use multi-core cables for
the contact in and output signals and
shielded multi-core cable for the analogue
signals.
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3-4-2. Contact outputs
The 4 contact outputs can be wired after
your own preferences. You can either use
them to switch AC or DC power or
voltages.
Two contact outputs (S1, S2) can be
used as process alanms or to control the
process. The first contact (S 1) is
programmed for a high alarm and the
second contact (S2) for a low alarm. The
functioning of the contacts can be
programmed from the service level §7-12.
As the switching capacity of the built-in
relays is limited, it is advised to use power
relays to switch heavy appliances. The
third contact (WASH/S3) is pre-defined as
a wash timer, controlling the cleaning of
the sensor.
11
An input is provided for a remotestart of the
wash cycle. It is possible to program the third
contact as a procss alanm of controlling
function too.
See §7 -13 for programming the other
functions. The settings for the wash timer are
programmed from the maintenance level
§4-5.
The fourt contact (FAIL) is reserved to
signal a malfunctioning in the measuring loop.
The contact is also closed when the
instrument is not powered (fail safe). Always
connect the FAIL- contat to an alarm device
(e.g. lamp, signal horn, alarm panel) to use
the fault detection possibilities of the EXA
00400.
Action S1, S2, FAIL
W ASH/S3
Power OFF -- - -.--
Power ON -- - -- -
No alarm
/
Power ON -.-- -.--
Alarm
Figure 8.
A multi-core cable with 5 to 8 cores for these
on/off functions will be sufficient.
3.4.3. Analogue output signals
The first output signal consist of an active
current signal of eiter 0..20 mA or 4..20 mA.
The maximum load can be 600 n including
the cable resistnce.
The second output signal consists of a voltage
signal of 0..1000 mV. The input impeance of
the receiving instrument should be more than
1 kn.
It is highly recommended to use shielded
cables for the output signals. Terminal 63 is
used to connect the shielding of the cable.
Wiring diagram
31 72
WASH
S3 FAIL
Figure 9.
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3-5. Wiring of sensors
3-5-1. General precautions
Generally speaking, transmission signals
from the dissolved oxygen sensor to the
transmitter are very low power, high
impedance level signals. Thus a lot of care
must be taken to avoid interference.
Before making connections to the
transmitter, make sure the next conditions
are met:
The sensor cable is not mounted in
tracks or duct together with high
voltage or power switching cables.
Only standard sensor cale is used.
The transmitter is mounted within the
distnce of the sensor cable (maxi-
mum length is 20 metre).
The setup is kept flexible for easy
insertion and retraction of the sensor
in the fitting.
3-5-2. Connection of the sensor cable
Connecting the sensor cable through the
gland located in the front right of the
instrument. The weather-tight gland should
be fasened hand-tight only.
Connect the wires of the sensor cable to
the terminals as shown in the wiring
diagram.
1M 12J6B1-E-H
3-5-3. Liquid earth
The diagnostic features include a membrane
integrity check.
This requires a Liquid Earth connection to
terminal 16.
Under service code 60 this function can be
activated.
3-5-4. Connecting the remote contact
Input for wash cycle
The terminals numbered 17 and 21 are
used to connect a remote push-button
switch. When the switch is closed the wash
cycle will start (if activated). See §4-5 for a
full description.
The switch should be closed for at least
0.25 second to make the EXA 00400
sense it is closed. After that time it must be
opened again.
21 117
LJ
Figure 10. Remote contact input

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Connection Diagram DOX8SM Sensor
IE T1 T2 RE
Grey
Connection Diagram PB30 Sensor
IE T1 T2 RE
Gr = Green,
Rd = Red,
Wt = White,
Bk = Black
YI =Yellow
Br = Brown
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15
4. COMMISSIONING
4.1. Operations overview
Routine Use Chapter
MAINTENANCE AIR CAL Calibration in air 5-1
Operation by keys through the H20 CAL Calibration in saturated water 5-2
closed cover MAN CAL Manual calibration 5-3
DISPLA Y Check or show additional values 5-4
HOLD Switch hold function on/off 5-5
COMMISSIONING SETPOINTS Adjusting the setpoints for the contacts 4-2
Operation by '-key when cover is RANGE Adjusting the output range 4-3
removed SET HOLD Activating the hold function 4-4
WASH Activating the wash timer 4-5
SERVICE SERVICE Fine tuning the performance 7
Operation by coded entry from
commissioning
Note: All 3 levels can be separately protected by a passcode. See §7-18.
1M 12J6B1-E-H

16 4-2. ADJUSTING THE SETPOINTS
11. ACCESS SETPOINTS
~SETPOINTS
Jl SfTP (!~ RANGE
$ET HOLD
WASH
SERVICE
YES NO MODE *
CJ CJ CJ 0
Remove cover by releasing 4 screws.
I MODE I
ESCAPE TO MEASURE can be used at
any stage to abort operation. WARNING:
If the HOLD function is activated the
instrument returns with the question HOLD
(flashing); answer YES or NO or MODE
again to return to measurement.
1M 12J6B1-E-H
2. SELECT WHICH SETPOINT TO
ADJUST
~SE N
Jl Sf TP I (!~ RANGE
SET HOLD
WASH
SERVICE
YES NO MODE *
CJ CJ CJ 0
Display will show' SETP1
Note: SETP 1 is for the contact output
marked S1; SETP2 for S2.
From the factory S 1 is
programmed as a high alarm
function at 19.5 mg/1.
S2 is programmed as a low alarm
function at 0.5 mg/1.
To change the functioning of output contacts
refer to §7-12 & 13.
To 'Change the WASH contact into a third
alarm contact S3 se §7-13.
In this case the display will show SETP3.
..
13. ADJUST THE SETPOINT VALUE
saa ~SETPONT
Jl SfTP lL£in~ NG
WASH
SERVICE
YES NO MODE *
CJ CJ CJ 0
The display will show the actual setting
) II'I