YOKOGAWA SC72 Installation guide

All Rights Reserved, Copyright © 2004, Yokogawa Electric Corporation. IM 12D03D02-02E 1/2
3rd Edition :Apr. 2008
ModelSC72 PersonalConductivityMeter QuickManual
This manual briefly describes setup, measurement, and routine maintenance procedures for the Model
SC72 Personal Conductivity Meter. Before using this meter, read Instruction Manual (IM 12D03D02-01E).
Key switches List of items in function mode
Display (faint color display for flashing state)
Flashing state: Lit up state:
1. Preparation for Measurement(refer to IM
12D03D02-01E, Chapter 2)
(1) Install Battery
(When first purchased, when replacing batteries, or when
meter has not been used for an extended period of time.)
(2) Connect Sensor Cable (when not connected)
When connecting sensor cable, tighten by turning only
the silver locknut, do not turn cable or waterproof cover.
Display Character Table
POWER
Auto Power Off
HOLD
F/ENT
MEAS
DATA
F01.EPS
When meter is OFF, press for at
least 1sec.to turn on power.
When meter is ON, press for
about 2 sec.to turn off the power.
Automatic Power OFF function
default: 20min.inactivity.
Press to start
measurement mode.
If already in MEAS
mode, it switches the
display panel.
Change set value.
If pressed while in
MEASmode, switches
to function mode.Also
used to enter set
value.
If you press this key during
measurement, markis
displayed, and present measured
values are held.To cancel, press
or keys.
If pressed duringmeasurement,
markflashes.
Press key to store measured
values in memory.
To abort data storage and return to
MEASmode, press or key
again while markis flashing.
MEAS
MEAS
F/ENT
HOLD
DATA
Item
dAt
t.Co
rnG
C.C
CAL
dEL.A
dAtE
tIME
ALM
A.oFF
bZ.o
SC.U
tP.U
VEr
dFLG
Details
Display storedmeasurement value
Temperature compensation setting
Range selection
Cell constant setting
Calibration withstandard solution
Delete all storedmeasuring data
Date setting
Time setting
Alarm time setting
Set AutoPowerOff interval
Set buzzerON/OFF
Set measurement unit
Set temperature unit
Version numberdisplay
Defragment storageddata
T01.EPS
F02.EPS
All display elements shown ON
Lit when setting
fixed ranges.
Lit when setting
temperature
compensation coefficient.
Lit orflash when
storingmeasured
values ordisplaying
stored data.
Lit when temporarily
holdingmeasured values.
Lit when calibrating
with standard solution.
Lit when setting
cell constant.
Battery life indicator
Press with
your fingers
Gasket
Batteries
458or more
(1) Loosen the screw holding the
battery boxcover using acoin or
similar object.
(2) Remove the battery boxcover,and
then install the batteries observing
polarity diagraminside.
(3) Make sure the gasket on the inside
rimof the battery boxis free of
foreign material.
(4)Put the cover backon.Insert the
tabs on the topof the cover into the
slots at an angle of at least 458and
lower the cover into position.
(5)Press the both ends of the cover
down with your fingers andtighten
the screw to fixthe cover onto the
unit using acoin or similar object.
Note:Do not attempt to tighten further
when you feelresistance before the
cover is fastenedin place.Loosen
the screw once andretighten.
F03.eps
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
Alphabet DisplayAlphabet Display DisplayNumerals
T02.EPS
* Alphanumerics are represented as follows on the LED
display.
(3) Set Date and Time (only when purchased or after
replacing batteries)
(4) Set Temperature Unit (only for 8F)
(5) Set Cell Constant (refer to IM 12D03D02-01E,
Sec. 2.5)
(6) Set Temperature Compensation Coefficients
(refer to IM 12D03D02-01E, Sec. 2.6)

IM 12D03D02-02E 2/2
3rd Edition :Apr. 2008
2. Measurement(refer to IM 12D03D02-01E,
Chapter3)
Measuring liquid’s temperature should be between 0
and 808C.
To fix the measuring range, see IM 12D03D02-01E, Sec.
4.3, Item (3).
d How to immerse the sensor.
d Measurement display
When the sensor is immersed into the measuring
liquid, the conductivity value is displayed. Each time
the MEAS key is pressed, the display toggles among the
three display types shown below.
3. Maintenance
d Washing Sensor (refer to IM 12D03D02-01E,
Sec. 5.2)
After the measurement, rinse the sensor with clean
water (for example, tap water) to remove stains.
d Calibration with Standard Solution
If sensor is not clean after long time use, use standard
solution and recalibrate the conductivity meter to
check if cell constant is normal.
d Replacing Batteries ( when is flashing)
(Refer to IM 12D03D02-01E, Sec. 2.1)
When replacing batteries, replace both batteries at the
same time.
After replacing, reset the time.
d Replacing O-rings and gaskets (refer to IM
12D03D02-01E, Sec. 5.5)
If sensor connecter O-ring or battery box gasket
become dirty or damaged,
waterproofing is not assured. Then replace to new
ones.
d How to store the measured value
d HOLD (temporary storage)
d How to store data in memory
To check the stored data, refer to IM 12D03D02-01E,
Sec. 4.3, Item (1).
4.Error Messages(refer to IM 12D03D02-01E,
Sec. 6.2)
Refer to IM 12D03D02-01E, Sec. 6.2 for corrective
action.
5. Storage(refer to IM 12D03D02-01E, Sec. 5.5)
· Wash sensor with water before storing.
· Leave sensor connected to meter to keep connector
clean.
· Remove batteries from meter if it is to be stored for long
time.
Air vent
Measuringliquidlevel
Cover
If air bubblesare on thissection,
measurement error mayoccur.
Electrode
element
F04.EPS
F05.EPS
Standard display Calendar display Clock display
MEAS MEAS
MEAS
day monthyearMeasuringliquid
temperature
Temperature
compensation coefficient
This display appears when NaCl
solution is specified at temperature
compensation coefficient setting.
conductivity
hour :minute
Delete stored data
Press
to
delete stored data.
Displaydayand
monthofstored
data
Display
dAt with
or
key.
Press
keyto
set.
Press
keyto abort
data deletion.
Press keyto returnto
measurement mode.
Display
other data.
Displayyear ofstored data
Displaytime ofstored data
F/ENT
F/ENT
F/ENT
F/ENT
F/ENT
DATADATA
DATA
DATA
DATA
DATA
Stored measurement data
Latest
data
MEAS
F08.EPS
F06.EPS
or
HOLD
HOLD
MEAS
F07.EPS
Abort data storage.
Execute data storage.
Data is not stored whenkeyis not pressed.
Press keyto store data while is flashing.
While is flashing,press
or keys to abort data storage.
F/ENT
F/ENT
MEAS
DATA
DATA
T03.EPS
Error message
Err1
Err2
Err3
Err6
or
Name
Temperature compensationcomputationvalue out ofrange
Out oftemperature measuring range
Calibrationerror
Meter electronics failure
Out ofmeasuring range