JENCO 6312 DT Manuel utilisateur
OPERATION MANUAL
JENCO MODEL 6312 DT
MICROCOMPUTER BASED
DO/ Temperature
TRANSMITTER & CONTROLLER
JENCO INSTRUMENTS, INC. JENCO ELECTRONICS, LTD.
7968 ARJONS DR., SUITE C P.O. BOX 161-178, ZhongXiao
SAN DIEGO, CA 92126 NanGang,TaiPei, TAIWAN
TEL: (858) 578-2828 TEL: (886-2) 2782-3226
FAX: (858) 578-2886 FAX: (886-2) 2782-3234
SHANGHAI JENCO ELECTRONICS, LTD.
18 Wangdong zhong Road,Sijing Town,Songjiang,Shanghai,CHINA.
TEL: 86-21-5761-9599
FAX: 86-21-5761-9598
E-MAIL: [email protected]
Web site:www.jencoi.com ; www.jenco.com.cn
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CONTENTS Page
I. INITIAL INSPECTION and ASSEMBLY 3
MOUNTING PROCEDURE 3
II. GENERAL INTRODUCTION 4
III. USING THE JENCO MODEL 6312DT 5
A. FRONT PANEL 5
B. NORMAL MODE DISPLAY 6
C. REAR CONNECTORS 7
D. TURNING ON/OFF THE INSTRUMENT 8
IV. MODEL 6312DT MODES 9
A. MAIN DISPLAY MODE 9
B. CALIBRATION/SETTING MODE 9
How to use the keys 10
a. PASSWORD CHECK page 11
b. USER SETTING page 11
c. DO CALIBRATION page 12
Follow these steps to do a Standard Calibration 13
Follow these steps to do a Product Calibration 14
d. DO CONTROL SETTING page 15
e. CURRENT OUT SETTING page 16
f. TEMP. CURRENT SETTING page 16
g. TEMP. CONTROL SETTING page 16
V. CONTROLLING THE RELAYS 17
A. RELAY ISOLATION VOLTAGE 17
B. RELAY OUTPUT LOAD 17
C. RELAY ACTION, SET POINT & HTSTERESIS 18
D. DO RELAYS 18
E. TEMPERATURE RELAY 19
VI. DO & TEMP 4-20 mA OUTPUT 19
A.ISOLATION VOLTAGE 19
B. OUTPUT LOAD 19
C. DO/TEMP LINEAR CURRENT OUTPUT 19
VII. RS485 INTERFACE OPERATION 21
A.INTRODUCTION 21
B. PREPARING THE METER 21
VIII. ERROR DISPLAYS AND TROUBLESHOOTING 22
IX. SPECIFICATIONS 23
X. WARRANTY 25
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I. INITIAL INSPECTION and ASSEMBLY
Carefully unpack the instrument and accessories. Inspect for
damages made in shipment. If any damage is found, notify your
Jenco representative immediately. All packing materials should be
saved until satisfactory operation is confirmed.
MOUNTING PROCEDURE
1. Make a cutout
on any panel, with
a thickness of
1/16 in. (1.5 mm)
to 3/8 in. (9.5mm).
2. Remove the
mounting
assembly from the
controller and
insert the
controller into the
cutout.
3. Replace the
mounting bracket assembly onto the controller and secure the
controller to the mounting panel.
Warning:
If the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may be
impaired.
Cleaning the instrument:
1. Be sure to remove the power before attempting to clean the
meter.
2. Use a lint free cloth and clean water or neutral detergent.
3. Wipe the outer surface of the instrument only.
4. Wipe dry the instrument before power again.
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II. GENERAL INTRODUCTION
The Jenco Model 6312DT (DOandTemperature) system, is a
rugged microprocessor based instrument assembled in a
watertight ¼DINcase, designed for use in laboratories and
process control applications.
The model 6312DT microprocessor allows the user to easily
recalibrate the parameters for the probes. The DO system can do
single or dual point calibration, regardless of which dissolved
oxygen display you use. The microprocessor also performs a self-
diagnostic routine every time you turn on the unit providing you
with basic information about the stability of the instrument.
The system simultaneously displays DO, Temperature, relay status
and current output in one LCD graphic screen. The LCD also
includes a backlight for badly lit environments. This system uses
a “polygraphic clark” membrane for the DO and a precise
thermistor for temperature, providing you with accurate readings
for all your measurements.
The model 6312DT is equipped with three programmable high or
low relays for DO and one programmable high or low relay for
temperature; all relays are hysteresis driven. The system also has a
isolated 4-20mA analog output for DO & temperature each, offset
and span configurable for the DO & temperature display.
The model 6312DT comes with a RS485 interface which can easily
let the user log all data with an IBM©PC/AT compatible
computer. For advanced users, the model 6312DT may also be
remotely controlled from main display mode to all
calibration/setting modes.
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III. USING THE JENCO MODEL 6312DT
A. FRONT PANEL
1. The [MODE/-]key.
1a. In Normal mode this key
will change the DO display
to DO %, DO ppb or DO
ppm.
1b. In Calibration/Setting
mode this key will move to
the next digit of the current
active parameter.
1c. In Calibration/Setting mode, pressing this key for two
seconds will move you back to the previous parameter.
2. The [CAL/VIEW]key.
2a. In Normal mode, the display will go to Calibration / Setting
mode if you press this key for about two seconds.
2b. During Calibration/Setting mode this key will switch to the
next available Calibration/Setting page. Pressing this key at
the last Calibration / Setting page will return the user to the
Normal mode.
3. The [ ]UP key.
During Calibration/Setting mode this key will increment the
current blinking digit of the active parameter.
4. The [ ]DOWN key.
During Calibration/Setting mode this key will decrement the
blinking digit of the active parameter.
During “DO CALIBRATION “ the user can press this key to
skip ZERO calibration.
5. The [ ]ENTER key.
During Calibration/Setting mode this key will save the
current modified parameter and move to the next parameter
on the page if the parameter is the last one in the page then it
will move to first parameter on the next available page.
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6. The [ ] LIGHT key.
This key will turn on or turn off the backlight of the LCD.
The backlight will automatically turn off if there is no key
activity for about two minutes.
7. LCD screen.
B. NORMAL MODE DISPLAY
1. DO mA OUT: -thiswill
display the output of the DO 4-
20 mA circuit.
2. TEMP mA OUT -thiswill
display the output of the
Temperature 4-20 mA circuit.
At POWER-ON DO & TEMP
mA OUT will show “OFF”for
about three seconds before
going to main display mode.
After exiting the Calibration /Setting pages, a “FROZEN”
message will be displayed for about 3 seconds if the unit is not
password locked.
3. annunciator - This will be displayed if Calibration/Setting
pages are password locked meaning the user can’t change
the values unless the correct 4 digit number has been entered.
4. H1 (High action relay 1) or L1 (Low action relay 1)- this is the
status of the DO Relay 1, if this is displayed then the Relay is
ON. H1 means the relay action is HIGH while L1 means the
relay action LOW. annunciator
5. H2 (High action relay 2) or L2 (Low action relay 2)annunciator –
this is the status of DO Relay 2, function is same with RELAY 1.
6. L3 (High action relay 3) or L3 (Low action relay 3)
annunciator – this is the status of DO Relay 3, function is same
with RELAY 1.
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7. H4 (High action relay 4) or L4 (Low action relay 4) annunciator–
this is the status of the Temperature Relay 4, if this is displayed
then the Relay is ON. H4 means the relay action is HIGH while
L4 means the relay action LOW.
8. Dissolved oxygen display and unit (%, ppb or ppm).
9. Temperature display and unit (℃).
C. REAR CONNECTORS
Before wiring the probes, relays, analog output, RS485 and power
cord be sure that you are connecting to the right terminal as shown
above. Remember that the unit is ON once the user plugs in the
power cord to an AC power supply.
1.ConnecttheAClinetotherearoftheinstrument.Themodel
6312DT can be used with 230VAC(115VAC)50/60 Hz. Power
consumption is 6 watts.MakesuretheEARTH connector is
connected to the earth lead of the AC power line.
2. Connect the proper load to the output relays. Make sure that the
load does not exceed the relay rating, 2.5Amp at
230VAC(5Amp at 115VAC).
3. Set the proper load to the 4-20mA output connector. Make sure
that the load impedance is less than 500 Ohms.
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CAUTION:
MAKE SURE YOU CONNECT THE AC POWER CORD TO THE
CORRECT AC TERMINALS. CONNECTING INCORRECTLY
MAY DAMAGE THE UNIT PERMANENTLY.
D. TURNING ON/OFF THE INSTRUMENT
By just plugging the unit to a
correct AC voltage the unit will be
ready for use. There is no Power
key so unplugging and plugging
the unit will turn OFF or turn ON
the unit respectively.
After the unit is turned on, it will
perform some basic self-
diagnostics and will display “OK”or“BAD”. If you received any
“BAD” messages turn OFF the unit and turn it ON again. (See VIII.
ERROR DISPLAYS AND TROUBLESHOOTING).
If the message persists then you might need to call your
distributor. (See XI. WARRANTY).
After the self-diagnostic is complete the temperature will be
displayed on the lower part of the LCD screen and you are ready
to make DO calibration or measurements. Just immerse the probes
halfway to the liquid. If possible do not allow the probes to touch
any solid object in the solution. There should be no air bubbles
around the probes either. Shaking or moving the probes
vigorously before recording any measurement will dislodge any
bubbles formed in the probes.
IV. MODEL 6312DT MODES
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A. MAIN DISPLAY MODE
Turning ON the unit will always start in main display mode.
This instrument is designed to provide 4 distinct measurements:
1. Temperature - current temperature of the solution, which is
always displayed
2. Dissolved Oxygen % -ameasurementofoxygeninpercent
saturation.
3. Dissolved Oxygen ppm - a measurement of oxygen in ppm.
4. Dissolved Oxygen ppb- a measurement of oxygen in ppb.
Temperature and DO (% , ppb or ppm) are always simultaneously
displayed in the graphic LCD screen in normal mode. You can
select which DO unit to display by pressing the [MODE/-]key.
B. CALIBRATION/SETTING MODE
Pressing the [CAL/VIEW] key for about two seconds during main
display mode will bring-up the first page of seven pages of the
Calibration/Setting mode. Pressing [CAL/VIEW] key will switch
to the next page until the last page, where pressing [CAL/VIEW]
again will return the user to main display mode.
Below is a simple flowchart showing the path of the [CAL/VIEW]
key:
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How to use the keys
1. At MAIN DISPLAY you need to press and hold the
[CAL/VIEW] key for two seconds to change the display to
VIEW SETTING PAGE or if the instrument is password locked
the display will be PASSWORD CHECK page.
2. You can change any blinking options or digit by pressing the
[]or[]keys.
3. During main display mode you can press [MODE/-]keyto
select the DO display unit .
4. For options in digit format you need to press the [MODE/-]
key to move the cursor to the next digit .
5. If you are satisfied with the selection you made you need to
anyblinkingoptionsordigitbypressingthe[]or[]keys.
For options in digit format you need to press the
[MODE/-- ] key to move to the next digit . If you are satisfied
with the selection you made you need to press the [ ]ENTER
key to save the changes and move to the next option. If you
Ce manuel convient aux modèles suivants
2
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