JENCO 6173 User manual
OPERATION MANUAL
JENCO MODEL 6173
MICROCOMPUTER BASED
pH/mV/Temperature
BENCH METER
JENCO INSTRUMENTS, INC. JENCO ELECTRONICS, LTD.
7968 ARJONS DR., SUITE C P.O. BOX LINKOU-117
SAN DIEGO, CA 92126 TAIPEI HSIEN, TAIWAN,R.O.C.
TEL: (858) 578-2828 TEL: (886-2)2601-6191
FAX: (858) 578-2886 FAX: (886-2)2601-7206
SHANGHAI JENCO ELECTRONICS, LTD.
18 WANGDONG ZHONG ROAD,SIJING,
SONGJING,SHANGHAI,CHINA,20160
TEL: 86-215-761-9599
FAX: 86-215-761-9598
WEBSITE : http://www.jenco.com.cn
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INITIAL INSPECTION
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.
GENERAL INTRODUCTION
The model 6173 is a precise instrument for the measurement
of pH, mV and temperature. A built-in microcomputer is used
to store, calculate and compensate for all the relevant
parameters relating to pH determinations. These include
temperature characteristics of the pH electrode, buffer
solutions and electrode slope deviations.
The mechanical touch keys are highly reliable with tactile
and audio feedback. This meter can operated with six 1.5V
batteries. Re-calibration is not required when power is
turned on again.
The meter has a large LCD that displays the pH (mV) and
temperature simultaneously along with the user-prompting
mode indication annunciators. The instrument prompts the
user through the calibration and measurement procedures.
An AUTOLOCK feature is provided for both pH and mV
measurements. This enables the instrument to automatically
sense the end point and "lock" the reading to indicate the
end point value of a measurement. The 6173 can also be used
in the non-AUTOLOCK mode.
The AUTOLOCK and the user prompting features help eliminate
most of the errors in the determination of pH and mV values.
The model 6173 uses pH and ORP electrodes with BNC
connectors and interchangeable ATC ( Automatic Temperature
Compensation ) / Temperature probes.
Other features include electrode offset recognition,
electrode slope recognition, electrode efficiency display,
built in buffer coefficients, automatic or manual
temperature compensation.
BATTERIES REPLACEMENT
F
ollow the procedures to replace the internal batteries.
1. Replace batteries when the BAT indicator appears on the
LCD . The instrument can operate within specifications
for approximately one hour after BAT starts to appear.
2. The battery compartment is located at the bottom side of
the meter (Refer to Figure 1). Flip the meter over so
that the bottom side is facing up. Lift the battery cover
to expose the battery compartment.
3. Replace all six type AA batteries.
4. Replace battery cover.
.
Figure 1
3
TURNING ON/OFF THE INSTRUMENT
When the instrument is not in use, press the ON/OFF key to
turn off the instrument. Unplugging the AC adaptor from the
instrument or from the AC line does not turn off the
instrument. It would automatically switch to the internal
batteries. The instrument will continue to operate on the
internal batteries.
ABOUT LCD DISPLAY
Figure2
1.AUTOLOCK ：In the autolock mode。
2.BAT. ：Low battery indicator。
3.HOLD ：Input is locked
4.WAIT ：Waiting to lock。
4
5.mV ：mV unit。
6.pH ：pH unit。
7.UNIT ：Unit indicator。
8.ATC ：ATC mode indicator。
9.MAN ：MANUAL mode indicator。
10.EFFICIENCY：Efficiency of electrode。
11.SLOPE ：Calibration indicator
12.STAND ：Calibration indicator
13. 14.00 ：Main LCD display
14.% ：Efficiency unit
15.25.0 ：Second LCD display
16.℃ ：Temperature unit
KEY FUNCTIONS OF THE MODEL 6173
Figure3
1. [MODE] key : The [MODE] key selects the parameters to be
displayed. Pressing the [MODE] key changes the
display sequentially to display : pH-AUTOLOCK ,
mV-AUTOLOCK , pH and mV. The calibration values
will not be affected by changing the display
modes.
5
6
2.&3. [STAND] and [SLOPE] keys：The [STAND] and [SLOPE] keys
are used for dual point pH calibration of the
instrument.
Pressing and holding the [STAND] key while
turning on the power ,will chang the buffer set
to the other available buffer set.
4.[MEA./EFF.] key ：a. The [MEA./EFF.] key is used to bring
the instrument out of the AUTOLOCK condition
when operating in the pH-AUTOLOCK or mV-AUTOLOCK
mode.
b. Press and hold this key for 5 seconds, the
large LCD will display the efficiency of the
electrode.
5.&6. The [ ∆ ] and [ ∇ ] keys ：The [ ∆ ] and [ ∇ ] keys
are used to manually enter the temperature
values. They have no effect on the instrument
when operating in ATC mode.
7. [CLEAR] key ： The [CLEAR] key is used to clear all
calibration values stored in the internal
memory. Under normal use the key will not be
activated unless pressed and held for 2 seconds.
8.[ON/OFF] key ：The [ON/OFF] key turns the instrument on or
off. The pH calibration values will not be
erased when the instrument is turned off.
CONNECTOR
Figure 4
1.RS-232 connector 2. AC adaptor input connector
3.ATC connector 4. Ref. Input connector
5.pH/ORP connector
OPERATIONAL PROCEDURES
BUFFER TABLE SELECT
There are two sets of buffer available for this unit :
4.01,7.00, 10.01pH and 4.00,6.86, 9.18pH.
You can change the buffer set by turning off the unit then
press and hold the [STAND] key as you turn on the unit
again.
pH CALIBRATION
Turn on the instrument by pressing the [ON/OFF] key. When
turn on, the display maintains at the same mode before shut
down.
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8
1. Calibration with an ATC/Temp probe in the pH-AUTOLOCK
mode.
1.1 Connect the pH electrode to the BNC connector and the
ATC/Temp probe to the ATC/Temp connector of the
instrument. The ATC annunciator on the LCD will be on.
Press the [MODE] key if necessary to go to pH-AUTOLOCK
mode.
1.2 Rinse the pH electrode and ATC/Temp probe in distilled
water and immerse them in pH buffer 7.00(6.86). The
instrument will display the buffer temperature.
1.3 Press the [STAND] key. The STAND annunciator will be
on and the WAIT annunciator will flash. At this time
the instrument is waiting for a stable reading. The
display will be locked to the buffer value
corresponding to the temperature of buffer 7.00
(6.86) as set in 1.2. When a stable reading is
reached, the WAIT annunciator will stop flashing and
stay off. The SLOPE annunciator will start to flash.
This means that the standardization at buffer
7.00(6.86) has been completed and the instrument is
now ready to be sloped at a second buffer.
Allow sufficient time for the electrode and ATC/Temp
probe to stabilize before taking any action.
1.4 Remove the pH electrode and ATC/Temp probe from
buffer 7.00 (or 6.86) and rinse both in distilled
water. After rinsing, immerse both in buffer
4.00(4.01) or 9.18(10.01) pH.
1.5 Press the [SLOPE] key. The SLOPE annunciator will
stop flashing and stay on. The WAIT annunciator will
start to flash, indicating that the instrument is
waiting for a stable reading. The display will be
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locked to the second buffer value corresponding to the
temperature of the second buffer. When a stable
reading is reached, the WAIT annunciator will stop
flashing and stay off. The instrument will calculate
and compensate for the pH electrode slope deviation
corresponding to the values of the two calibration
buffers. The instrument is now dual point calibrated
and ready for measurements.
After two point calibration, pressing and holding the
[MEA./EFF.] key for about 5 seconds will display the
new electrode efficiency.
2. Calibration with manual temperature compensation in the
pH-AUTOLOCK mode.
2.1 Connect the pH electrode to the BNC connector of the
instrument. The MAN annunciator will be on. Press the
[MODE] key if necessary to go to pH-AUTOLOCK mode.
2.2 Rinse the pH electrode in distilled water and immerse
it in buffer 7.00(6.86). Set the instrument to display
the temperature of the buffer by pressing the [ ∆ ]
and [ ∇ ] keys. The displayed temperature must be
less than 60. ℃
2.3 Press the [STAND] key. The STAND annunciator will be
on and the WAIT annunciator will flash. This means
that the instrument is waiting for a stable reading.
The display will be locked to the buffer value
corresponding to the temperature of buffer 7.00 (or
6.86) as set in 2.2. When a stable reading is reached,
the WAIT annunciator will stop flashing and stay off.
The SLOPE annunciator will start to flash, indicating
that the standardization at buffer 7.00(6.86) is
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completed and the instrument is ready to be sloped at
a second buffer.
Allow sufficient time for the electrode and ATC/Temp
probe to stabilize before taking any action.
2.4 Remove the pH electrode from buffer 7.00 (or 6.86),
rinse with distilled water and immerse it in buffer
4.00(4.01) or 9.18(10.01). Set the instrument to the
temperature of the 2nd buffer as in 2.2. The displayed
temperature must be less than 60. ℃
2.5 Press the [SLOPE] key. the SLOPE annunciator will stop
flashing and stay on. The WAIT annunciator will start
to flash, indicating that the instrument is waiting
for a stable reading. The display will be locked to
the value of the second buffer corresponding to the
temperature of the second buffer as set in 2.3 . When
a stable reading is reached, the WAIT annunciator will
stop flashing and stay off. The instrument will
calculate and compensate for the pH electrode slope
deviation corresponding to the values of the two
calibration buffers. The instrument is now dual point
calibrated and ready for measurements.
3. Calibration with ATC/Temp probe in pH mode.
3.1 Connect the pH electrode to the BNC connector and the
ATC/Temp probe to the ATC/Temp connector of the
instrument. The ATC annunciator on the LCD will be on.
Press the [MODE] key for the LCD to display pH and the
AUTOLOCK annunciator to be off.
3.2 Rinse the pH electrode and ATC/Temp probe in distilled
water and immerse them in pH buffer 7.00(6.86).the
instrument will display the buffer temperature.
3.3 Allow sufficient time for the electrode and ATC/Temp
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