MRC CD-4303 User manual

CODUCTIVITY METER
Model : CD-4303
Your purchase of this
PRESSURE METER marks a
step forward for you into
the field of precision
measurement. Although
this PRESSURE METER is a
complex and delicate
instrument, its durable
structure will allow many
years of use if proper
operating techniques are
developed. Please read
the following instructions
carefully and always keep
this manual within easy
reach.
OPERATION MANUAL
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] [email protected]
MRC.2.18

TABLE OF CONTENTS
1. FEATURES..
.
.................................................................. 1
2. SPECIFICATIONS... ......................................................2
2-1 General Specifications............................................2
2-2 Electrical Specifications..........................................3
3. FRONT PANEL DESCRIPTION......
.
................................4
3-1 Display.........
.
......................................................4
3-2 Power Off/On button..........................................4
3-3 Data Hold Button.........
.
......................................4
3-4 / button...............
.
℃℉ ......................................4
3-5 LCD Contrast Ad
j
ust...........................................4
3-6 Memory "Record" Button....................................4
3-7 Memory "Call" Button.........................................4
3-8 Factor Button(Temp. Compensation Ad
j
ust)..
.
....4
3-9 Ran
g
e Select Switch...........................................4
3-10 Temp. Compensation Button..
.
............................4
3-11 Battery Compartment/Cover...............................4
3-12 Input Socket.......................................................4
3-13 RS-232 Output Terminal.....................................4
3-14 Electrode Handle..........
.
......................................4
3-15 Conductivity Electrode......
.
..................................4
3-16 Electrode Plu
g
....................................................4
4. MEASURING PROCEDURE............................................5
5. ADDITIONAL FEATURES..............................................8
6. CALIBRATION PROCEDURE..........................................9
7. RS232 PC SERIAL INTERFACE................
.
....................9
8. BATTERY REPLACEMENT.............................................10

1. FEATURES
* Innovative feature with built-in automatic temperature
compensation values adjustable between 0 to 5.0% per .℃
* Selecting "0% per " of Temp. Coefficient Adjust, allows℃
you to take uncompensated conductivity readings.
* Wide automatic temperature compensation
ran
g
e from 0 to 50 .℃℃
* Carbon rod electrode for long life.
* Microprocessor circuit assures high accuracy and provides
special functions and features.
* Super large LCD display with contrast adjustment for best
viewing angle.
* Dual LCD display, show both conductivity & temp. values.
* Heavy duty & compact housing case.
* Records Maximum, Minimum and Average readings with
RECALL facilities.
* Data hold function.
* Auto shut off prolongs battery life.
* Operates from DC 9V battery, MN1604 (PP3) or equivalent.
* RS 232 PC serial interface.
* Uses durable, long-lasting components, enclosed in a
strong, light weight ABS-plastic housing case.
* Use selectable temperature units, i.e. or .℃℉
* Wide applications: water conditioning, aquariums, beverage,
fish hatcheries, food processing, photography, laboratory,
paper industry, plating industry, quality control, school &
college, water conditioning.
* The portable conductivity meter provides fast, accurate
readings, with digital readability and the convenience of a
remote probe.
1

2. SPECIFICATIONS
2-1 General Specifications
Circuit Custom one-chip microprocessor LSI
circuit.
Display Dual function display, 13 mm(0.5")
Super large LCD display with contrast
adjustment for best viewing angle.
Measurement Conductivity : 3 ranges
199.9 uS, 1.999 mS, 19.99 mS.
Temperature:
0 - 60 / 32 - 140 .℃℉
Temperature Automatic from 0 to 60 (32 - 140 ),℃℉
Compensation with temperature compensation factor
variable between 0 to 5.0% per C.
Memory Records Maximum, Minimum and Average
Recall readings with RECALL facility.
Power off Manual off by push button or Auto shut off
offer 10 minuite(Not activated during
memory record function).
Data Output RS 232 PC serial interface.
Over load Indicated by "- - - -".
indication
Sampling Time Approx. 0.8 second.
Operating 0 to 50 - main instrument.℃
Temperature 0 to 60 - probe only.℃
Operating Max. 80% RH.
Humidity
Power Supply DC 9V battery, MN1604(PP3) or equivalent.
Heavy duty type.
Power Current Approx. DC 7.8 mA.
2

Weight 350 g/0.77 LB (included batteries)
Size Main instrument:
180 x 72 x 32 mm(7.1 x 2.8 x1.3 inch).
Probe :
Round, 22 mm Dia. x 120 mm length.
Accessories Instruction manual.....................
.
1 PC.
Included Sensor probe.............................
.
1 PC.
carryin
g
case..............................1 PC.
2-2 Electrical Specifications(23±5 )℃
A. Conductivity
Range Measurement Resolution Accuracy
200 uS 0.1 to 199.9 uS 0.1 uS
2 mS 0.2 to 1.999 mS 0.001 mS ± (2 % F.S. + 1 d)
20 mS 2 to 19.99 mS 0.01 mS * F.S. - Full scale
* uS - micro Simens, mS - milli Simens
B. Temperature
Measuring Range 0 to 60 /32 to 140℃℃℉ ℉
Resolution 0.1 /0.1℃℉
Accuracy 0.8 /1.5℃℉
3

3. FRONT PANEL DESCRIPTION
Fig. 1
3-1 Display 3-9 Range Select Switch
3-2 Power Off/On button 3-10 Temp. Coefficient
3-3 Data Hold Button Button
3-4 / button℃℉ 3-11 Battery Compartment/
3-5 LCD Contrast Adjust Cover
3-6 Memory "Record" 3-12 Input Socket
Button 3-13 RS-232 Output
3-7 Memory "Call" terminal
Button 3-14 Electrode Handle
3-8 Factor Button 3-15 Conductivity Electrode
(Temp. Coefficient 3-16 Electrode Plug
Adjust) Electrode
4

4. MEASURING PROCEDURE
4-1 Conductivity measurement
(1) Push the "Power Off/On Button"(3-2, Fig. 1) to power the
instrument.
(2) The instrument will default to 2% per Temperature℃
Compensation factor. The meter has built-in Automatic
Temperature Compensation adjustable between 0 to 5%
per .℃
In order to change the default value carry out the
following procedures :
a. Push the "Temp. Compensation Button"(3-10, Fig.1)
,the display will show
2.0 %
P℃
b. Push the "Factor Adjust Button"(3-8, Fig. 1) to select
the desired compensation factor. The value will
increment in steps of 0.1 % per .℃
c. Once the desired value is reached, push the "Temp.
Compensation Button"(3-10, Fig. 1) to set the new
value.
(3) Select the applicable range, using the "Range Select
Button"(3-9, Fig. 1).
* If the display shows "- - - -", it indicates an overload
condition, select the next higher range.
* If the display shows "_ _ _ _", it indicates an
out-of-range condition, select the next lower range.
5

(4) Immerse the "Conductivity Electrode "(3-15, Fig. 1)
into the solution, up to the immersion level.
(5) During the measurement, the lower LCD Display will
show the temperature of the solution.
* Push the " / Button"(3-4, Fig. 1) to change℃℉
the temperature display unit from " to "℃℉
or " to ".℉℃
4-2 Data Hold
* During measurement, pushing the "Data Hold
Button"(3-3, Fig. 1) will hold the display values &
the LCD will show the "D.H" symbol.
* To cancel the Data Hold function, Press the Data
Hold Button, once more.
4-3 Data Record( Max., Min., Average reading)
* The DATA RECORD function displays the
maximum, minimum and average readings. To start
the DATA RECORD function, press the "Record
Button"(3-6, Fig. 1) once. "REC" symbol will appear
on the LCD display.
* With the "REC" symbol indicated on the display
(a) Push the "CALL Button"(3-7, Fig. 1) once,
then the "Max" symbol with the maximum values
recorded will appear on the LCD display.
(b) Push the "CALL Button" once again, the "Min"
symbol with the minimum values recorded will
appear on the LCD display.
6

(c) Push the "CALL Button" once more, the "AVG"
symbol with the average values will appear on
the LCD display.
(d) To de-activate the Data Record function, Press
the "Record Button" (3-6, Fig. 1) once again.
All associated anunciators will disappear from the
display.
4-4 For quick measurement, follow the procedures
shown below :
Main procedures
Chan
g
e Select the desired
POWER the default ran
g
e
ON
T
emperature
Compensation Select or℃℉
Factor, if
required
T
ake Measurement
Optional measurin
g
procedures
DATA HOLD MEMORY RECORD RS232 OUTPUT
Max., Min. AVG
Power mana
g
ement
AUTO POWER OFF or MANUAL POWER OFF
(Not activated under memory record function
durin
g
Memory
Record Selection)
7

5. ADDITIONAL FEATURES
(a) The instrument has built-in "Auto Power Shut-off"
in order to prolong battery life. The meter will switch
off automatically if none of the buttons are pressed
within 10 min.
To de-activate this feature, Select the memory record
function during measurement, by pressing the
"RECORD" button(3-6, Fig.1).
(b) The instrument also features the ability to adjust the
contrast of the display.
This is achieved by controlling the "LCD Contrast
Adjust" pot (3-5, fig. 1).
6. CALIBRATION PROCEDURE
The meter has been calibrated during manufacture.
However, it may be necessary to re-calibrate periodically.
Particularly if the instrument is used foe a long period or if
the conductivity electrode is changed.
To re-calibrate the instrument, follow the procedures
shown below :
(1) Prepare a " 1.413 mS Calibration Solution ".
(2) Slide the " Range Select Switch "(3-9, Fig. 1) to "2 mS"
position.
(3) Immerse the " Conductivity Electrode "(3-5, Fig. 1)
into the solution up to the immersion level.
(4) Adjust the " Calibration Adjust Pot "(VR4, Fig. 2),
located within the battery compartment, until the display
indicates the value of the calibration solution.
FRONT PANEL
VR VR VR VR VR
12 346 Fi
g
. 2
x
battery compartment
8

7. RS232 PC INTERFACE
The instrument features an RS232 output via 3.5 mm
Terminal ( 3-13, Fig. 1).
The connector output is a 16 digit data stream which
can be utilized to the user's specific application.
An RS232 lead with the following connection will be
required to link the instrument with the PC serial
input.
Meter PC
(3.5 mm
j
ack plu
g
) (9W 'D" Connector)
Center Pin......................................Pin 2
Ground/shield...................................
.
Pin 5
The 16 digit data stream will be displayed in the
following format :
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Each digit indicate the following status :
D0 End Word
D1 to D4 Upper Display readin
g
, D1=LSD, D4=MSD
D5 to D8 Lower Display readin
g
, D5=LSD, D8=MSD
D9 Decimal Point(DP) for Upper display.
0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP
D10 Decimal Point (DP) for lower display
0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP
9

D11 & D12 Anunuciator for Upper Display
01
=
℃13 = uS
02
=
℉14
=
mS
D13 Anunuciator for Lower Display
0 =No Symbol 1
=
C2=F
D14 Readin
g
Polarity for the Display
0 = Both upper & lower display value are "+".
1 = Upper "-", Lower "+".
2 = Upper "+", Lower "-".
3 = Both upper & lower display value are "-".
D15 Start Word
8. BATTERY REPLACEMENT
(1) When the left corner of LCD display show "LBT",
it is necessary to replace the battery. However,
in-spec measurement may still be made for several
hours after low battery indicator appears before the
instrument become inaccurate.
(2) Slide the Battery Cover(3-11, Fig. 1) away from the
instrument and remove the battery.
(3) Install a 9V battery(heavy duty type) and replace the
cover.
10