JENCO 6011M User manual

Operation Manual
MODEL 6011M/6011EU
Basis Portable
pH/ORP/Temperature Meter
6011M/6011EU

1
CONTENTS
GENERAL INTRODUCTION………………....................2
INITIAL INSPECTION……...………………....................2
INSTALLING THE BATTERIES..…………....................3
CONNECTOR................................................................3
DISPLAY & KEYS FUNCTIONS…..……………...…………4
A. Display ................................................................4
B. Keys.....................................................................5
OPERATIONAL PROCEDURES..……..........................7
A. Buffer Set Selection...............................................7
B. pH Calibration........................................................7
C. pH Measurements................................................11
D. Temperature Measurements..................................12
E. mV Measurements................................................12
F. Save, Recall and Delete Data.................................13
G. pH Buffers..…..........……………………..............14
ERROR DISPLAYS AND TROUBLESHOOTING.......15
SPECIFICATIONS………………..……........................16
WARRANTY………………………….........................17

2
GENERAL INTRODUCTION
Thank you for selecting the 6011M/6011EU meter. The
6011M/6011EU is a precision tool that measure pH, ORP and
temperature. A built-in microprocessor stores, calculates and
compensates for all parameters related to pH determinations
including pH electrode temperature characteristics, electrode slope
deviations and buffer solutions.
This unit has a waterproof IP67 case. The touch mode keys are
highly reliable with tactile and audio feedback. This meter can
operate with one 9 V battery, typical battery life is 800 hours.
Re-calibration is not required when power is turned on again.
The front of the meter has a large LCD that displays pH or ORP and
temperature simultaneously along with user prompts and mode
indicators. The unit prompts the user through calibration and
measurement procedures.
An AUTOLOCK feature for both pH and ORP measurements
enables the unit to automatically sense the end point and “ √ ” the
display to indicate the end point value of a measurement.
AUTOLOCK and user prompts help to eliminate most errors in
determining pH and mV values, resulting in precise, repeatable and
error-free measurements. The 6011M/6011EU can also be used in
non-AUTOLOCK mode.
The unit is also equipped with a non-volatile memory allowing the
user to store 50 different sets of readings. This unit will assign a site
number for each set of reading so the user can review the data
easily.
The model 6011M/6011EU is available with pH, ORP and ATC
(Automatic Temperature Compensation) probes. Other features
include electrode offset recognition, electrode slope recognition,
electrode efficiency display, built-in buffer coefficients, automatic or
manual temperature compensation, long battery life and 50/60Hz
AC noise rejection. This meter is user-friendly for field, industrial and
laboratory applications.
INITIAL INSPECTION
Carefully unpack the unit 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.

3
INSTALLING THE BATTERIES
The 6011M/6011EU meter is packaged with one 9 V battery
required for operation. To insert the batteries into the meter, follow
the procedure outlined below.
Figure 1: Battery compartment
1. Use a screw driver to remove the four screws and battery cover
to expose the battery compartment. (Figure 1.)
2. Replace the 9 V battery.
3. Replace the battery cover and make sure to secure the four
screws for the water-tight feature.
CONNECTOR
Figure 2: 6011M Connector
1. pH/ORP connector (BNC connector)
2. ATC connector (6 PIN Waterproof connector)

4
Figure 3: 6011EU Connector
1. pH/ORP connector (BNC connector)
2. ATC connector (3.5 mm Waterproof phone jack)
DISPLAY & KEYS FUNCTIONS
A. Display
Figure 4: Active LCD screen
1.-
Low battery indicator.
2.√-
This will indicate that the
reading is frozen during
AUTOLOCK mode.
3. -
This will be displayed when
the unit is still waiting for a
stable reading or end point
sensing.
4.Data storage site number.

5
5. AUTO-
AUTOLOCK mode indicator.
6. ATC/MAN-
ATC indicator will be
displayed if a temperature
probe is connected
otherwise the MAN
indicator will be displayed.
7. Each-
To delete a single set of data
from the data storage.
8. All-
To delete all the data in the
data storage.
9. Main display for pH, mV and
probe efficiency values
10. pH/mV-
Unit and mode indicators.
11.Temperature and unit
display
12. Save-
To save a reading into the
data storage.
13.Recall-
To recall data from the data
storage.
14. Full-
This will indicate that all 50
data storage sites are used
up.
15. EFF-
This will be displayed if the
user is viewing the efficiency
of the electrode.
16. Delete-
To delete stored data.
17. Buffer selection-
This indicator will flash if the
unit is not yet calibrated.
This indicator will remain
lit-up if the unit has been
calibrated.
B. Keys
Mea.
Eff.
Stand
Slope
Mode
Clear
On/Off-
Powers on and shuts off the meter.
Mode-
Selects display mode. Pressing this key changes the
display sequentially to display pH-AUTOLOCK,
mV-AUTOLOCK, pH, mV, Recall and Delete
interface.
In “Recall” and “Delete” modes, press this key to exit
“Recall” and “Delete” modes respectively.
In “calibration”,press “Mode” key to exit calibration
mode.

6
Up/Down-
The two keys are used to manually enter the
temperature values. They have no effect on the unit
when operating in ATC mode.
In “Recall” mode, view saved data and data storage
site number by pressing these keys.
In “Delete” mode, press these keys to select between
the “Delete Each” and “Delete All” mode.
In “Delete Each” mode, view to be deleted data and
data site numbers by pressing these keys.
Stand/Slope-
The “Stand” and “Slope” keys are used for pH
calibration of the unit. Pressing and holding the
“Stand” key while turning on the power, will change
the buffer set to the other available buffer set.
Mea./Eff.-
The key is used to bring the unit out of the
AUTOLOCK condition when operating in the
pH-AUTOLOCK or mV-AUTOLOCK mode.
Press and hold this key for 5 seconds, the LCD will
display the efficiency of the electrode and Offset
value.
Clear/Enter-
It is used to clear the unit when error signal appears.
It clears all calibration values stored in the internal
memory.
Under normal press and hold this key for 5 seconds,
all LCD elements will lit up. The meter clears all
calibration values stored in internal memory.
In the measure mode, press this key to save reading
into the next available data storage site.
At the Recall interface, press this key to display the
last set of saved data.
At the Delete interface, press this key to go into
“Delete” mode.
In the “Delete All” mode, press this key to delete all
saved data.
In the “Delete Each” mode, press this key to delete a
single set of data.
Mea.
Eff.
Stand
Slope
Mode
Clear
Mea.
Eff.
Stand
Slope
Mode
Clear
Slope
Mea.
Eff.
Mea.
Eff.
Stand
Slope
Mode
Clear

7
OPERATIONAL PROCEDURES
A. pH Buffer Set Selection
The 6011M/6011EU meter has two buffer sets: 7.00, 4.01,
10.01 pH and 6.86, 4.00, 9.18 pH. The meter is factory
pre-set at 7.00, 4.01 and 10.01 pH.
To change the buffer set, turn off the unit, then press and hold
the “Stand” key while turning on the unit again.
[Note: There is no need to repeat this procedure every time
the unit is power up unless one decides to change the buffer
settings.]
B. pH Calibration
The 6011M/6011EU up to 3 point calibration.
[Note: If the device is required to perform more than one
calibration points, the first calibration point must be 6.86/7.00
pH.]
a. Calibration with an ATC/Temp probe in the pH-AUTOLOCK
mode.
1. Turn the unit on. Press “Clear/Enter” key for 5 seconds, all
LCD elements will lit up. The meter clears all calibration values
stored in the internal memory.
2. Connect the pH electrode to the BNC connector and the
ATC/Temp probe to the ATC/Temp connector of the unit:
“ATC” icon will lit up. “pH” icon and “AUTO” icon will lit up. The
“buffer” icon will flash.
3. Rinse the pH and ATC/Temp probes in distilled water and
immerse them in the first buffer solution (either 7.00 or 6.86
pH). Allow temperature reading to stabilize, then press and
hold “Stand” key for 2 seconds to calibrate. The “ ” icon will
flash until the unit detects a stable reading. Once the unit
calibrates the first point, the “4.00（4.01）” and “9.18（10.01）”
icon will flash. The unit is ready to be sloped at the second
buffer.
[Note: If the first buffer solution is 7.00 or 6.86 pH, at this
moment, press the “Mode” key. The unit will exit the
calibration mode. Single point calibration is complete.
If the first buffer solution is 4.00, 4.01, 9.18 , 10.01 pH, at this
moment, the unit will automatically exit the calibration mode.

8
Single point calibration is complete.]
4. Rinse the pH and ATC/Temp probe in distilled water and
immerse them in the second buffer solution (either 4.00 /
4.01 pH or 9.18 / 10.01 pH corresponding to the flashing
number on display). Allow temperature reading to stabilize,
then press “Slope” key to calibrate. The “ ” icon will flash
until the unit detects a stable reading. Once the unit
calibrates the second point, the selected two buffers lit up
and the remaining buffer starts to flash. The unit is ready to
be sloped at the third buffer.
[Note: At this moment, press the “Mode” key, the unit will
exit the calibration mode. Dual point calibration is complete.]
5. Rinse the pH and ATC/Temp probe in distilled water and
immerse them in the third buffer solution (either 4.00/4.01 pH
or 9.18/10.01 pH corresponding to the flashing number on
display). Allow temperature reading to stabilize, then press
“Slope” key to calibrate. The “ ” icon will flash until the unit
detects a stable reading. Once the unit calibrates the third
point and the unit will automatically exit the calibration mode.
Three point calibration is complete.
6. The unit calculates and compensates for the pH electrode
slope deviation corresponding to the values of the calibrated
buffers. After calibration, press and hold “Mea./Eff.” key for
about 5 seconds to display the new electrode efficiency and
offset.
b. Calibration with manual temperature compensation in the
pH-AUTOLOCK mode.
1. Turn the unit on. Press “Clear/Enter” key for 5 seconds, all
LCD elements will lit up. The meter clears all calibration values
stored in internal memory.
2. Connect the pH electrode to the BNC connector of the unit,
“MAN” icon will lit up. “pH” icon and “AUTO” icon will lit up. The
“buffer” icon will flash.
3. Rinse the pH probes in distilled water and immerse it in the
first buffer solution (either 7.00 or 6.86 pH). Adjust the
temperature reading to that of the first buffer using the “Up” or
“Down” keys (0.0 to 60.0 ℃) before pressing “Stand” key.
Then press and hold “Stand” key for 2 seconds to calibrate.
The “ ” icon will flash until the unit detects a stable reading.
Once the unit calibrates the first point, the “4.00（4.01）” and

9
“9.18（10.01）” icon will flash. The unit is ready to be sloped at
the second buffer.
[Note: If the first buffer solution is 7.00 or 6.86 pH, at this
moment, press the “Mode” key. The unit will exit the
calibration mode. Single point calibration is complete.
If the first buffer solution is 4.00, 4.01, 9.18 , 10.01 pH, at this
moment, the unit will automatically exit the calibration mode.
Single point calibration is complete.]
4. Repeat steps 4 to 5 of “Calibration with an ATC/Temp probe
in the pH-AUTOLOCK mode” for dual and three point
calibration.
5. The unit calculates and compensates for the pH electrode
slope deviation corresponding to the values of the two
calibration buffers. After calibration, press and hold
“Mea./Eff.” key for 5 seconds to display the new electrode
efficiency and offset.
c. Calibration with an ATC/Temp probe in the pH NON-
AUTOLOCK mode.
1. Turn the unit on. Press “Clear/Enter” key for 5 seconds, all
LCD elements will lit up. The meter clears all calibration values
stored in internal memory.
2. Connect the pH electrode to the BNC connector and the
ATC/Temp probe to the ATC/Temp connector of the unit:
“ATC” icon will lit up. “pH” icon is on. The “buffer” icon will
flash.
3. Rinse the pH and ATC/Temp probes in distilled water and
immerse them in the first buffer solution (either 7.00 or 6.86
pH). Allow temperature reading to stabilize, then press and
hold “Stand” key for 2 seconds to calibrate. Once the unit
calibrates the first point, the “4.00（4.01）” and “9.18（10.01）”
icon will flash. The unit is ready to be sloped at the second
buffer.
[Note: If the first buffer solution is 7.00 or 6.86 pH, at this
moment, press the “Mode” key. The unit will exit the
calibration mode. Single point calibration is complete. If the
first buffer solution is 4.00, 4.01, 9.18 , 10.01 pH, at this
moment, the unit will automatically exit the calibration mode.
Single point calibration is complete.]
4. Rinse the pH and ATC/Temp probe in distilled water and
immerse them in the second buffer solution (either 4.00/4.01

10
or 9.18/10.01 pH). Allow temperature reading to stabilize, then
press “Slope” key to calibrate. Once the unit calibrates the
second point, the selected two buffers lit up and the remaining
buffer starts to flash. The unit is ready to be sloped at the third
buffer.
[Note: At this moment, press the “Mode” key, the unit will
exit the calibration mode. Dual point calibration is complete.]
5. Rinse the pH and ATC/Temp probe in distilled water and
immerse them in the third buffer solution (either 4.00/4.01 pH or
9.18/10.01 pH corresponding to the flashing number on
display). Allow temperature reading to stabilize, then press
“Slope” key to calibrate. Once the unit calibrates the third point
and the unit will automatically exit the calibration mode. Three
point calibration is complete.
6. The unit calculates and compensates for the pH electrode
slope deviation corresponding to the values of the calibrated
buffers. After calibration, press and hold “Mea./Eff.” key for
about 5 seconds to display the new electrode efficiency and
offset.
d. Calibration with manual temperature compensation in the
pH NON-AUTOLOCK mode.
1. Turn the unit on. Press “Clear/Enter” key for 5 seconds, all
LCD elements will lit up. The meter clears all calibration values
stored in internal memory.
2. Connect the pH electrode to the BNC connector of the unit,
“MAN” icon will lit up. Press “Mode” key until “pH” icon is on.
The “buffer” icon will flash.
3. Rinse the pH probes in distilled water and immerse it in the
first buffer solution (either 7.00 or 6.86 pH). Adjust the
temperature reading to that of the first buffer using the “Up” or
“Down” keys (0.0 to 60.0 ℃) .Then press and hold “Stand”
key for 2 seconds to calibrate. The unit immediately calibrates
the first point, the selected buffer remains lit up while the
remaining buffers start to flash. The unit is ready to be sloped
at the second buffer.
[Note: If the first buffer solution is 7.00 or 6.86 pH, at this
moment, press the “Mode” key. The unit will exit the
calibration mode. Single point calibration is complete. If the
first buffer solution is 4.00, 4.01, 9.18 , 10.01 pH, at this
moment, the unit will automatically exit the calibration mode.
Single point calibration is complete.]

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4. Repeat steps 4 to 5 of “Calibration with an ATC/Temp probe
in the pH NON- AUTOLOCK mode” for dual and three point
calibration.
5. The unit calculates and compensates for the pH electrode
slope deviation corresponding to the values of the calibrated
buffers. After calibration, press and hold “Mea./Eff.” key for
about 5 seconds to display the new electrode efficiency and
offset.
C. pH Measurements
To take pH measurements, 6011M/6011EU must be calibrated
before first use.
a. Measurement with an ATC/Temp probe in the pH-
AUTOLOCK mode.
1. Connect the pH electrode to the BNC connector and the
ATC/Temp probe to the ATC/Temp connector of the unit. The
“ATC” icon will lit up.
2. Press “Mode” key until “pH”, “AUTO”, “ATC”, “buffer” “ ”
icons lit up.
3. Rinse the pH electrode and ATC/temp probe with distilled
water and immerse them in the sample to be measured.
Remove any air bubbles trapped around the probe by shaking
or stirring the probe.
4. Press the “Mea./Eff.” key. The “ ” icon will start flashing. The
unit is waiting for a stable reading. The display will track the pH
value as sensed by the pH electrode and the ATC/Temp
probe.
5. When the “ ” icon disappears, the reading is then “√” and will
not respond to further changes from the sample. The pH value
shown is the pH value of the sample at the displayed sample
temperature.
[Note: For samples that are inherently unstable, the unit will
not AUTOLOCK. In this case, use the pH NON- AUTOLOCK
mode for measurements.]
b. Measurement with manual temperature compensation in
the pH-AUTOLOCK mode.
1. Connect the pH electrode to the BNC connector of the unit.
The “MAN” icon will lit up. Set unit to display the sample

12
temperature by pressing the “Up” and “Down” keys (-10.0 to
120.0 ℃).
2. Repeat steps 2 to 5 of “Measurement with an ATC/Temp
probe in the pH- AUTOLOCK mode”.
c. Measurement with an ATC/Temp probe in the pH NON-
AUTOLOCK mode.
1. Connect the pH electrode to the BNC connector and the
ATC/Temp probe to the ATC/Temp connector of the unit. The
“ATC” icon will lit up.
2. Press “Mode” key until the “pH” and “buffer” icons lit up.
3. Rinse the pH electrode and ATC/temp probe with distilled
water and immerse in the sample to be measured.
4. Allow sufficient time for the display to stabilize. The instrument
will display the pH value of the sample at the displayed sample
temperature.
d. Measurement with manual temperature compensation in
the pH NON-AUTOLOCK mode.
1. Connect the pH electrode to the BNC connector of the unit.
The “MAN” icon will lit up. Set unit to display the sample
temperature by pressing the “Up” and “Down” keys (-10.0 to
120.0 ℃).
2. Repeat steps 2 to 4 of “Measurement with an ATC/Temp
probe in the pH NON- AUTOLOCK mode”.
D. Temperature Measurements
The 6011M/6011EU can measure temperature independently
with the ATC/temp probe without using the pH electrode. Place
the ATC/temp probe in the sample. The unit will display the
measured temperature.
E. mV Measurements
a. Measurement in the mV-AUTOLOCK mode.
1. Connect the combination ORP electrode to the BNC connector
of the unit.
2. Press “Mode” key until the “mV”, “AUTO”, “MAN” and “ ”
icons lit up.

13
3. Rinse electrode with distilled water and immerse it in sample to
be measured.
4. Press the “Mea./Eff.” key. The “ ” icon will start flashing. The
unit is waiting for a stable reading. The meter will track the mV
value as sensed by the ORP electrode.
5. When the “ ” icon disappears, the reading is then “√” and will
not respond to further changes from the sample. The mV value
is the sample reading.
[Note: For samples that are inherently unstable, the unit will
not AUTOLOCK. In this case, use the mV NON- AUTOLOCK
mode for measurements.]
b. Measurement in the mV NON-AUTOLOCK mode.
1. Connect the combination ORP electrode to the BNC connector
of the unit.
2. Press “Mode” key until the “mV” and “MAN” icons lit up.
3. Rinse electrode with distilled water and immerse it in sample to
be measured.
4. Allow sufficient time for the display to stabilize. The instrument
will display the mV value of the sample.
F. Save, Recall and Delete Data
a. Saving readings to memory.
1. In the measure modes, press the “Clear/Enter” key to save
data. The “Save” icon with the corresponding site number will
lit up for a brief moment to indicate a successful data save.
Saving is now complete.
2. If the “Full” icon is displayed, this means that all 50 data saving
sites are used up. No new data can be saved until existing
saved data are deleted.
b. Recalling readings from memory.
1. To recall saved data, Press “Mode” key until the“Recall” icon
lit up. Press "Clear/Enter" key to go into “Recall” mode.
2. Press the “Up” or “Down” keys to select the storage site
number.
3. Press “Mode” key to exit “Recall” mode.

14
c. Deleting data.
1. Press “Mode” key until the “Delete” icon lit up. Press
"Clear/Enter" key to go into “Delete” mode.
2. Select “Delete All” or “Delete Each” mode by pressing the
“Up” or “Down” key.
3. In the “Delete all” mode, press “Clear/Enter” key to clear all
stored data. Deletion is now complete.
4. In the “Delete Each” mode, use “Up” and “Down” key to
select data to be deleted. Then press “Clear/Enter” key to
delete. Deletion is now complete. The next set of saved data
will automatically move up a slot in the storage site.
5. Press “Mode” key to exit “Delete” mode.
G. pH Buffers
The temperature coefficient of pH calibration buffers 4.01, 6.86,
7.00, 9.18 and 10.01 pH are stored inside the instrument. The
buffers used to calibrate the instrument must exhibit the same
temperature characteristics as the stored values.
Temperature coefficient of the pH buffers
℃
4.00
6.86
9.18
4.01
7.00
10.01
0
4.01
6.98
9.46
4.01
7.11
10.32
5
4.00
6.95
9.39
4.01
7.08
10.25
10
4.00
6.92
9.33
4.00
7.06
10.18
15
4.00
6.90
9.28
4.00
7.03
10.12
20
4.00
6.88
9.23
4.00
7.01
10.06
25
4.00
6.86
9.18
4.01
7.00
10.01
30
4.01
6.85
9.14
4.01
6.98
9.97
35
4.02
6.84
9.10
4.02
6.98
9.93
40
4.03
6.84
9.07
4.03
6.97
9.89
45
4.04
6.83
9.04
4.04
6.97
9.86
50
4.06
6.83
9.02
4.06
6.97
9.83
55
4.07
6.83
8.99
4.08
6.97
9.80
60
4.09
6.84
8.97
4.10
6.98
9.78
[Note: The actual reading of the instrument can differ from the
values shown by ±0.01pH.]

15
ERROR DISPLAYS AND TROUBLESHOOTING
[Note: If the meter still does not perform normally after the
above measures are taken, call Jenco Service Department.]
Main
Display
Possible Cause(s)
Corrective Action(s)
"Er1"
1. “Stand” was pressed
before the electrode and
ATC/Temp probe settled
to within +/-1.5 pH of the
buffer value.
2. pH electrode offset is
greater / less than +/-1.5
pH.
3. pH electrode is faulty.
1. Press “Clear/Enter” key,
allow sufficient time for the
electrode and ATC/Temp
probe to stabilize, re-press
“Stand” key to start the
calibration procedure.
2. Replace the buffer and /or
the pH electrode. Press
“Clear/Enter” key to
recalibrate meter.
3. Replace electrode.
"Er2"
1. “Slope” was pressed
before the electrode and
ATC/Temp probe settled
to within 30% of the
buffer value.
2. Buffer 4.00, 4.01, 9.18
and 10.01 pH is not
correct.
3. pH electrode slope is off
by more than 30% of
ideal slope.
1. Allow sufficient time for the
electrode and ATC/Temp
probe to stabilize, re-press
“Slope” key to continue the
calibration procedure.
2. Check if the correct buffer is
used.
3. Replace the buffer and /or
the pH electrode. Press
“Clear/Enter” key to
recalibrate meter.
"Er3"
1. Temperature is out of the
0.0 to 60.0°C range.
1. Bring the buffer temperature
within range.
"over"
/ ”undr”
1. Measured pH is out of
the –2.00 to 16.00 pH
range.
2. Measured mV is out of
the –1999 to 1999 mV
range.
3. Measured temperature is
out of the –10.0 to
120.0 °C range.
1. Bring sample pH into the
correct measuring range.
2. Bring sample ORP into the
correct measuring range.
3. Bring sample temperature
into the correct measuring
range.

16
SPECIFICATIONS
Display
Range
Resolution
Accuracy
pH
-2.00 to 16.00 pH
0.01 pH
±0.01 pH
ORP
-1999 to 1999 mV
1 mV
±0.1% F.S.
Temperature
-10.0 to 120.0 °C
0.1 °C
±0.3 °C
pH buffer recognition
7.00, 4.01, 10.01 pH or 6.86,
4.00, 9.18 pH
pH Temperature compensation
AUTO/MAN –10.0 °C to
120.0 °C
pH Calibration
Up to 3 points
pH Buffer Temperature range
0 to 60.0 °C
pH Electrode Offset recognition
±90 mV at 7.00 or 6.86 pH
pH Electrode SLOPE
recognition
±30% at 4.00, 4.01, 9.18 and
10.01 pH
Input impedance
>1012 Ω
Temperature sensor
Thermistor, 10 k Ω at 25°C
(6011M)
Thermistor, 30 k Ω at 25°C
(6011EU)
Calibration Back-up
EEPROM
Datalogging capabilities
50 data sets
Automatic shut off function
10 minutes of non-use
Audio Feedback
All Touch Keys
End Point Sensing & Hold
Yes
Screen
Segmented LCD
Power
9 Volt battery
Battery Life
800 Hours
Ambient Temperature Range
0 to 50 °C
Relative Humidity
At 90% RH
Waterproof
IP67
Dimensions
214 X 74 X 42 mm
216 X 80 X 50 mm (Have jacket)
Weight
290 g

17
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.

18
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