JENCO VisionPlus pH630 User manual

Operation Manual
MODEL pH 630
Microcomputer Based
pH&Temperature
Pocket Meter
pH630

1
CONTENTS
INITIAL INSPECTION AND ASSEMBLY ...................2
BEFORE YOUR FIRST USE ........................…………2
A. Replace the Batteries ...........................................2
B. Soak the Electrode.... ..........................................2
C. Setup and Calibrate the Electrode and Meter............2
VISIONPLUS pH 630 OVERVIEW........................3
A. Meter Description..................................................3
B. LCD Display ..........................................................3
OPERATION MODES AND KEYPAD OPERATIONS...4
A. Operation Modes.....................................................4
B. Keypad Operations...............................................4
USING VISIONPLUS pH 630............................5
A. Power on/off ......................................................5
B. Select Buffer........................................................5
C. Calibrate pH.........................................................5
D. Measure ..............................................................6
E. Hold Data ...........................................................6
REPLACE ELECTRODE…...........................................7
ERROR DISPLAYS AND TROUBLESHOOTING …....8
SPECIFICATIONS ......................................................9
WARRANTY ...............................................................10

2
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.
BEFORE YOUR FIRST USE
A. Replacing the Batteries
Replace the battery when the blinking
low battery indicator “ ” appears
on the upper left corner of the LCD
screen. The instrument can operate
within specifications for approximately
2~3 hours after low battery indicator
appears.
1. Shown in the right figure.
2. Take off the battery cover.
3. Remove all of the old
batteries and insert a new set
of batteries ensuring the
polarities are correct.
B. Soak the Electrode
1. Remove the electrode cap covering the VisionPlus pH 630
meter.
2. Soak the electrode in a pH 4 buffer solution for 10 minutes
before first use or after storage.
C. Setup and Calibrate the Electrode and Meter
VisionPlus pH 630 must be setup and calibrated before your
first use. Please follow the instructions detailed in section
USING VISIONPLUS pH 630 6.
12

3
VISIONPLUS pH 630 OVERVIEW
A. Meter Description
1.
Battery cap
2. LCD screen
3. Keypad
4. Electrode collar
5. Electrode & ATC assembly
(Electrode cap is not shown.)
B. LCD Display
1. CALIBRATION buffer(s) and NUMBER of calibration point
2. LOW BATTERY indicator
3. CALIBRATION mode indicator
4. HOLD mode indicator
5. pH reading
6. TEMPERATURE reading (for ℃version) *
7. TEMPERATURE reading (for °F version) *
*℃or °F is factory pre-set.
Hold
Cal Enter
1
2
3
4
5
PT-70

Germany

4
OPERATION MODES AND KEYPAD OPERATIONS
A. Operation Modes
VisionPlus pH 630 meter has 4 operation modes:
1. Measure Mode. Measure Mode is used to make all pH
and temperature measurements.
2. Calibration Mode. Calibration Mode is used to perform
1, 2 or 3 point calibration.
3. Hold Mode. Hold Mode is used to display held measured
values for increased ease of use.
4. Buffer Select Mode. Buffer Select Mode is used to select
the buffer set, which can either be 7.00(7.00/4.01/10.01) or
6.86(6.86/4.00/9.18).
B. Keypad Operations
Key
Operation
Mode
Duration
Function
Hold
Measure
0 second
Holds current
measurement reading.
Press again to resume
measuring.
Hold
0 second
Returns to Measure
Mode.
Calibration
0 second
Leaves Calibration
Mode.
Cal
Measure
0 second
Enters Calibration Mode.
Calibration
0 second
the “HOLD” icon is displayed,
then the unit will recalibrate the
buffer.
Measure
5 seconds
or more
Enters Buffer Select Mode.
On/Off
All
0 second
Turns meter on/off.
Enter
Calibration
0 second
the “HOLD” icon is displayed,
then the unit will save the
calibration.

5
USING VISIONPLUS pH 630
A. Power On/Off
Press the “On/Off ” key to turn the unit on. If the unit is running
then you can press the ”On/Off “ key to turn the unit off. The unit
will automatically turn off after 30 minutes of no key activity.
B. Select Buffer
1. Make sure unit is in “Measure Mode”.
2. Press the “Cal” key for 5 seconds, the unit will display 7.00
to indicate you successfully changed from “6.86/4.00/9.18”
set to “7.00/4.01/10.01” set.
3. Press the “Cal” key for 5 seconds again, the unit will display
6.86 to indicate you successfully changed from
“7.00/4.01/10.01” set to “6.86/4.00/9.18” set.
Note: There is no need to repeat this procedure every time unless
one decides to change the buffer settings.
C. Calibrate pH
The user can select one, two or three point pH calibration.
1. Rinse the electrode & ATC assembly in distilled
water and immerse them in the first buffer solution.
The temperature displayed is the buffer temperature.
2. Press “Cal” key to initiate calibration, the buffer icon will
be on, the “HOLD” icon will flash until the unit detects a
stable reading, When a stable reading is reached, the
“HOLD” icon will be on. Press the “Enter” key to save
the calibration, wait a second, the first point has been
calibrated and the unit is ready to be sloped at the
second buffer.
[Note: At this moment, Press the “Hold” key, the unit
will exit the calibration mode. Single point calibration is
complete.]
3. Remove the electrode & ATC assembly from the first
buffer. Rinse them in distilled water and immerse them
in the second buffer solution. The unit will display the
temperature of the second buffer.
4. The first buffer icons will be on, the second and third
buffer icons will flash and the “HOLD ” icon will flash

6
until the unit detects a stable reading, When a stable
reading is reached, the “HOLD” icon will be on. Press
the “Enter” key to save the calibration, wait a second,
the second point has been calibrated and the unit is
ready to be sloped at the third buffer.
[Note: At this moment,Press the “Hold” key, the unit will
exit the calibration mode. Dual points calibration is
complete.]
5. Remove the electrode & ATC assembly from the second
buffer. Rinse them in distilled water and immerse them in
the third buffer solution. The unit will display the
temperature of the third buffer.
6. The first, second buffer icons will be on, the third buffer
icons will flash and the “HOLD” icon will flash until the
unit detects a stable reading, When a stable reading is
reached, the “HOLD” icon will be on. Press the “Enter”
key to save the calibration, wait a second, the third point
has been calibrated and the unit will automatically exit
the calibration mode. Three points calibration is
complete.
[Note: For accurate measurements, it is recommended
that pH calibration is preformed once a week and after
replacing the electrode.]
D. Measure
Dip the meter into the test solution in the “Measure Mode”.
E. Hold Data
1. When the pH reading is stable, press “Hold” key once to
lock the reading.
2. Press “Hold” key again to unlock reading and the unit will
return to “Measure Mode”. The unit is now ready for
another measurement.

7
REPLACE ELECTRODE
1. Unscrew the electrode collar to remove the electrode &
ATC assembly as shown in the right figure.
2. Remove the old electrode from
the electrode collar.
3. Insert a new electrode, make
sure the electrode fit back into
the meter correctly.
4. Screw back the electrode collar.
5. Soak the electrode in a pH 4 buffer solution for 10 minutes
and recalibrate the pH 630 following the instructions
detailed in section USING VISIONPLUS pH 630..

8
ERROR DISPLAYS AND TROUBLESHOOTING
pH LCD
Display
ATC
Display
DISPLAY
Mode
Possible cause(s)
[Action(s)]
"ovr"
"ovr"
Measure
Temperature >99.9°C range.
[Bring solution to a
lower temperature.]
[Replace electrode &
ATC assembly .]
"udr"
"udr"
Measure
Temperature <-9.9°C range.
[Bring solution to a
higher temperature.]
[Replace electrode &
ATC assembly .]
"udr" or
"ovr"
-9.9~ 99.9°C
Measure
When pH value < 0.00pH
(udr) or >14.00pH(ovr)
[Over Range or Recalibrate.]
"ovr"
0.0 ~ 60.0°C
pH CAL
a.pH-
OFFSET
b.pH-
SLOPE
a. Offset @ 7.00pH:
mV>100mV
[email protected]pH:
mV>108.3mV
b. New slope>ideal
slope by 30%
[Use a new buffer
solution.]
[Replace electrode & ATC
assembly.]
"udr"
0.0 ~ 60.0°C
pH CAL
a.pH-
OFFSET
b.pH-
SLOPE
a. Offset @ 7.00pH:
mV<-100mV
Offset @ 6.86pH:
mV< 91.7 mV
b. New Slope<ideal
slope by 30%
[Use a new buffer
solution.]
[Replace electrode & ATC
assembly.]
"udr" or
"ovr"
-9.9~ 99.9°C
pH CAL
a.pH-
OFFSET
b.pH-
SLOPE
When buffer temperature
<0.0°C(udr) or >60.0°C(ovr)
[Bring buffer temperature
within 0 to 60°C range .]

9
SPECIFICATIONS
pH
Range
Resolution
Accuracy
0.00 to 14.00 pH
0.01 pH
±0.02 pH ± 1 LSD
Temperature
Range
Resolution
Accuracy
-9.9 to 99.9 °C
14.2 to 99.9 °F
100 to 212 °F
0.1 °C
0.2 °F
1 °F
±0.3 °C
±0.6 °F
±1 °F
pH
pH buffer recognition pH 7.00, 4.01, 10.01 or
pH 6.86, 4.00, 9.18
pH Temperature compensation
pH Buffer Temperature range
pH Electrode Offset recognition
AUTO –9.9°C (14.2°F) to
99.9 °C (212°F)
0.0°C (32.0°F) to 60.0°C
(140°F)
±100 mV at pH 7.00
+108.3 mV / -91.7 mV at pH 6.86
pH Electrode Slope recognition
±30% at pH 4.00, 4.01, 9.18 and 10.01
Input impedance >10
12
Ω
Temperature
Temperature sensor Thermistor, 10 k Ω at 25°C
Temperature unit Factory pre-set
General
Power: LR44 x 4
Battery life: 200 Hours
Ambient temperature range 0.0 to 50.0 °C
Display(pH/TEMP): pH:7.43 mm high
TEMP:5.74mm high
Case IP67 water-tight case
Weight 105 g

10
WARRANTY
Jenco warrants this product to be free from significant
deviations in material and workmanship for a period of 1 year
from date of purchase. If repair or adjustment is necessary and
has not been the result of abuse or misuse, within the year
period, please return-freight-prepaid and the correction of the
defect will be made free of charge. If you purchased the item
from our Jenco distributors and it is under warranty, please
contact them to notify us of the situation. Jenco Service
Department alone will determine if the product problem is due to
deviations or customer misuse.
Out-of-warranty products will be repaired on a charge basis.
RETURN OF ITEMS
Authorization must be obtained from one of our representatives
before returning items for any reason. When applying for
authorization, have the model and serial number handy,
including data regarding the reason for return. For your
protection, items must be carefully packed to prevent damage in
shipment and insured against possible damage or loss. Jenco
will not be responsible for damage resulting from careless or
insufficient packing. A fee will be charged on all authorized
returns.
NOTE: Jenco reserves the right to make improvements in
design, construction and appearance of our products without
notice.

11
Jenco Instruments, Inc.
7968 Arjons Drive, Suite C
San Diego, CA 92126 USA
TEL: [phone]
FAX: [phone]
E-Mail: [email protected]; [email protected]
Website: www.jencoi.com
Jenco Electronics, Ltd.
6F., NO. 81, Sec.2, Chang-an E. Rd., Jhongshan District, Taipei
City 104, Taiwan
TEL: [phone]
FAX: [phone]
E-Mail: [email protected]
Website: www.jenco.com.tw
Shanghai Jenco Instruments, Ltd.
18 Wang Dong Zhong Road
Sijing Town, Songjiang
Shanghai, China
TEL: [phone]
FAX: [phone]
E-Mail: [email protected]
Website: www.jenco.com.cn