GPG C270 User manual

C270
CONDUCTIVITY MONITOR
OPERATION GUIDE

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CONTENTS
1. INTRODUCTION....... 2
2. FEATURES AND TECHNICAL SPECIFICATIONS. … 2
2.1 Features........ 2
2.2 Technical S ecifications........ 2
3. INSTALLATION..... 2
3.1 Dimension........ 3
3.2 Panel Cut-out....... 4
3.3 User Interface and Descri tion.. 4
3.4 Connection........... 6
4. SETTING AND OPERATION...... 7
4.1 Switch Measuring and Setting Mode.................. 8
4.2 Menu Structure........ 8
4.3 Parameter Setting and O eration........ 11
4.3.1 Set Alarm........ 11
4.3.2 Calibration.......... 12
4.3.3 Tem erature Com ensation.... 14
4.3.4 Set Current Out ut........ 15
4.3.5 Measurement Mode...... 17
4.3.6 Select cell constant....... 18
4.3.7 Set TDS coefficient....... 18
4.3.8 Restore Factory Setting.... 18
5. ERROR CODES........... 19
6. SENSOR..... 19
7. WARRANTY... 22
8. STANDARD CONFIGURATION..... 22
9. OPTIONAL CONFIGURATION....... 22

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C270 Intelligent On-line Conducti ity Monitor
1. INTRODUCTION
The C270 is a micro rocessor controlled conductivity measurement
instrument. The unit utilizes a multifunction LCD to dis lay readings and
rovide feedback to the user. It is available with different o tion to
rovide fully configurable control, alarm and feedback with u to two
relays and 4-20mA current out ut sources.
2. FEATURES AND TECHNICAL SPECIFICATIONS
2.1 Features
(1) 4 LCD digital with back-lit dis lay
(2) Measured conductivity, resistivity, TDS, tem erature
(3) 0 ~ 100℃ automatic/manual tem erature com ensation
(4) Manual or Automatic buffer adjustment
(5) Restore factory setting function is available
(6) Galvanic se aration between in uts and out uts and su ly voltage
(7) Different in ut for excellent noise rejection
(8) High and low rogrammable alarm, 250V/10A relay out ut
2.2 Technical Specifications
(1) Ranges of measurement ：0~18 M Ω·cm or 0~19.99uS/cm,
0~999.9uS/cm, 0~9999uS/cm, 0~100mS/cm,0~10000 m
(2) Accuracy：±0.5 F.S / ±0.2℃
(3) Linearity：±0.1% of range
(4) Re eatability：±0.1% of range
(5) Tem erature com ensation ty e：Auto / manual 0℃ to 100℃
(6) Alarm Out ut：Two relays out uts (250V/10A)，full range with
hysteresis adjustable
(7) Current out ut：DC 4~20mA，O to-isolated out uts，( 750Ω Max.

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load)
(8) Ambient O erating tem erature：-10~+55℃
(9) Humidity：≤95%
(10) Power su ly：AC110 ~220V，50~60Hz
3. INSTALLATION
The anel-mounting version is designed to be flush mounted and sealed
in a square cut-out in a anel, and is held in lace with the two screw
clam s rovided.
3.1 Dimensions
Figure 2 : overall dimensions panel-mounting
Figure 1 : installation diagram

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3.2 Panel Cut-out
¨The anel cut-out for mounting the unit should be 92 mm x 92 mm
(+1.0– 0.0).
¨Two screw clam s are su lied and are fitted from the back of the
instrument
3.3 User Interface and Description
Front anel descri tion:
(1) LCD digital Monitor，dis layed the measured values，and can also
Figure
3
:
cut
-
out
d
iagram
Figure 4: front panel diagram

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be dis layed rom t function, arameter values and error codes in
interactive.
(2) TDS indicator light. When the light is lit in the measuring state，means
the measured value is TDS; When the light is lit in the setting state,
means the in ut arameter is TDS.
(3) H alarm light，Under the conditions of setting high alarm, when the
measured H value of the solution is higher than the value of High
alarm, the H alarm light will be turned on and the high relay (N/O)
close; When the measured H value of the solution is lower than the
value of High alarm, furthermore lower than the hysteresis, the H
alarm light will be turned off and the high relay (N/O) o en.
(4) L alarm light，Under the conditions of setting low alarm, when the
measured H value of the solution is lower than the value of low alarm,
the L alarm light will be turned on and the low relay (N/O) close; When
the measured H value of the solution is higher than the value of low
alarm, furthermore higher than the hysteresis, the L alarm light will be
turned off and the low relay (N/O) o en.
(5) SET indicator light, the light will be turned on when entering the
setting state.
(6) uS/cm indicator light. When the light is lit in the measurement state，
means the measured value is conductivity, and unit is uS/cm.
(7) mS/cm indicator light. When the light is lit in the measurement state，
means the measured value is conductivity, and unit is mS/cm.
(8) MΩ
ΩΩ
Ω·
··
·cm indicator light. When the light is lit in the measurement state，
means the measured value is resistivity, and unit is MΩ·cm.
(9) ℃
℃℃
℃ indicator light. When the light is lit in the measurement state，
means the measured value is Tem erature; When the light is lit in the
setting state, means the in ut arameter is Tem erature.

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(10) MENU ，Press the MENU key to enter or exit the setting state.
(11) DOWN ，In the setting state, using the DOWN key the user can
cycle through the next menu. To adjust a value, the DOWN key is
used to select a digit .
(12) UP ，In setting state, using the UP key the user can cycle
through the front menu. To adjust a value, the UP key is used to
increment the digit . In measurement state, the UP key is used
to switch the dis lay of tem erature or conductivity/resistivity/TDS.
(13) ENTER key is the enter button to confirm enter the menu and
store the setting arameters.
3.4 Connection
Connection terminals wiring directions：
(1) Conductivity sensor line A (red)
(2) Conductivity sensor line B (yellow or white)
(3) Tem erature sensor 1 (blue or brown)
(4) Tem erature sensor 2 (black)
(5) 4~20mA current out ut (+)
(6) 4~20mA current Out ut (-)
Figure 5: connection terminals diagram

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(7) S are
(8) S are
(9) S are
(10) High/Low alarm relay（Common）
(11) S are
(12) High alarm relay（N/O, normally o en）
(13) Low alarm relay（N/O, normally o en）
(14) S are
(15) S are
(16) S are
(17) S are
(18) S are
(G) Ground
(L2) S are
(L1) Power su ly terminal: Connect AC110 ~ 220V
(N) Power su ly terminal: Connect the ower su ly hase
★
CAUTION ! :
The s ecified erformance of the C270 is entirely de endent on correct
installation. For this reason, the installer should thoroughly read the
instructions before attem ting to make any electrical connections to the
unit.
4. SETTING AND OPERATION
After installation, check the connection is correct, then ut the sensor
into the test solution, reheat for 10 minutes, you can erform the
following o erations.

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Set high alarm hysteresis
4.1 Switch Measuring and Setting Mode
Instrument has two states: measuring state and setting state. After
owering u the device enters the measuring state automatically. In the
measuring state, ress MENU to enter the setting state. In the setting
state, ress MENU to return to the measuring state.
4.2 Menu Structure
(Manual Tem erature com ensation ）
Set high alarm value
Set
low
alarm
value
Set
low
alarm
h
ysteres
is
Set
T
em erature com ensation coefficient
Set Manual tem erature com
ensation
value
Auto calibration low
Tem . value
Auto calibration high
Tem . value
(Auto Tem erature com ensation ）

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(The in ut for current out ut is conductivity)
(
Manual set
low relay close)
(
Manual set
low r
elay o en)
(
Manual set
high relay close)
Set current out ut start value
Set current out ut
end
value
Set conductivity start value for
current out ut
Se
t conductivity end value for
current out ut
Set tem erature start value for
current out ut
Set tem erature end value for
current out ut
Manual set
current out ut
value
(
Manual set
high relay o en)
(The in ut for current out ut is tem erature)