Hanna HI 2400 User manual

1
www.hannainst.com
Dissolved Oxygen
Bench Meter
HI 2400
Instruction Manual
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TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
WARRANTY .................................................................................................... 2
PRELIMINARY EXAMINATION ............................................................................ 3
GENERAL DESCRIPTION .................................................................................... 3
PROBE FUNCTIONAL DESCRIPTION .................................................................... 4
FUNCTIONAL DESCRIPTION .............................................................................. 5
SPECIFICATIONS ............................................................................................. 6
OPERATIONAL GUIDE ....................................................................................... 7
DO CALIBRATION ............................................................................................ 10
GOOD LABORATORY PRACTICE (GLP) .................................................................13
SETUP ..........................................................................................................14
LOGGING ....................................................................................................... 19
TEMPERATURE CALIBRATION (for technical personnel only) .................................22
PC INTERFACE ............................................................................................... 24
PROBE & MEMBRANE MAINTENANCE ............................................................... 28
TROUBLESHOOTING GUIDE .............................................................................. 29
ACCESSORIES ............................................................................................... 30
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY
HI 2400 is guaranteed for two years against defects in workmanship and
materials when used for its intended purpose and maintained according to
instructions. Electrodes and probes are guaranteed for six months. This
warranty is limited to repair or replacement free of charge.
Damage due to accidents, misuse, tampering or lack of prescribed
maintenance is not covered.
If service is required, contact the dealer from whom you purchased the
instrument. If under warranty, report the model number, date of
purchase, serial number and the nature of the problem. If the repair is
not covered by the warranty, you will be notified of the charges incurred.
If the instrument is to be returned to Hanna Instruments, first obtain
a Returned Goods Authorization number from the Technical Service
department and then send it with shipping costs prepaid. When shipping
any instrument, make sure it is properly packed for complete protection.
Dear Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using this instrument.
This manual will provide you with the necessary information for correct
use of this instrument, as well as a precise idea of its versatility.
If you need additional technical information, do not hesitate to e-mail us
at [email protected].
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GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
HI2400 is a logging microprocessor-based DO/Temperature bench meter.
It can store up to 100 lots in memory, with up to 8000 readings. These
readings can be transferred to a computer for further analysis or permanent
storage.
Dissolved Oxygen is indicated in ppm (parts per million) or in %.
All measurements are automatically compensated for temperature.
Salinity compensation in water allows direct determination of Dissolved
Oxygen in saline waters and altitude compensation readjusts for the
altitude variance.
The Dissolved Oxygen probe has a membrane covering the polarographic
sensors and a built-in thermistor for temperature measurements and
compensation.
This permeable PTFE membrane isolates the sensor elements from the
testing solution, but allows Oxygen to pass through. When a voltage
is applied across the sensor, oxygen that has passed through the
membrane reacts causing a current flow, and hence determining a
reading.
Remove the instrument from the packing material and examine it
carefully to make sure that no damage has occured during shiping. If
there is any damage, notify your Dealer or the nearest Hanna Customer
Service Center.
Each instrument is supplied with:
•HI 76407/2 DO probe with 2 m (6.7') cable
•HI 76407A membrane cap (2 pcs)
•HI 7041S electrolyte solution (30 ml)
•12 VDC power adapter
•Instruction Manual
Note:Save all packing material until you are sure that the instrument
functions correctly. All defective items must be returned in their
original packing with the supplied accessories.
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1. DO Probe
2. Protective Cap
3. Watertight Shielded Cable
4. Polypropylene Probe Body
5. Temperature Sensor
6. O-Ring Seal
7. Silver Chloride Anode
8. Platinum Cathode (sensor)
9. Oxygen Permeable PTFE Membrane
10. Membrane Cap
7
8
10
9
3
4
1
2
4
5
6
PROBE FUNCTIONAL DESCRIPTIONPROBE FUNCTIONAL DESCRIPTION
PROBE FUNCTIONAL DESCRIPTIONPROBE FUNCTIONAL DESCRIPTION
PROBE FUNCTIONAL DESCRIPTION
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1) Liquid Crystal Display (LCD).
2) CAL key, to enter and exit calibration mode.
3) CFM/GLP key, to confirm calibration selection, different setup values
or to display Good Laboratory Practice information.
4) ºC key, to manually increase temperature value or other parameters.
5) ºC key, to manually decrease temperature value or other parameters.
6) SETUP key, to enter/exit SETUP mode.
7) RANGE key, to select measurement range (% or ppm), switch to
focused data in SETUP or toggle between standard value and
temperature during calibration.
8) LOG/CLR key, to store a value into memory, or to select to delete log
records.
9) RCL key, to enter and exit view memory mode.
10) ON/OFF switch.
11) Power supply socket.
12) USB connector.
13) DO probe connector.
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
Front Panel
Rear Panel
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SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
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POWER CONNECTION
Plug the 12 VDC adapter into the power supply socket.
Notes:•This instrument use non volatile memory to retain the
calibration parameters and all the other settings even when
unplugged.
•Make sure a fuse protects the main line.
PROBE CONNECTION AND PREPARATION
To take measurements, connect the DO probe to the meter securely by
aligning the pins with the socket located on the back of the meter,
pushing the plug in and tightening the threaded ring.
Probes shipped from Hanna Instruments are dry. To hydrate the probe
and prepare it for use, connect it to the
meter and proceed as follows:
1. Remove the red and black plastic
cap. This cap is for shipping purposes
and can be thrown away.
2. Wet the sensor by soaking the bottom
2½ cm (1") of the probe in electrolyte
(HI 7041S) for 5 minutes.
3. Rinse the membrane cap (HI 76407A
supplied in the kit with the meter)
with electrolyte solution while shaking
it gently. Refill with clean electrolyte
solution.
4. Tap gently the sides of the membrane
cap with your finger tip to ensure
that no air bubbles are trapped. To
avoid damaging the membrane, do
not tap it directly on the bottom.
5. Make sure that the rubber O-ring
sits properly inside the membrane
cap.
6. With the sensor facing down,
slowly screw the cap clockwise.
Some electrolyte will overflow.
When not in use and during polarization
(see page 8), use the protective transparent
cap supplied in the kit with the meter.
Shipping
cap
black
red
FILL FIRST
THEN TAP
THEN SCREW
BACK ON
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE
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INSTRUMENT START-UP
•Turn the instrument on by pressing the ON/OFF switch.
•All LCD tags are displayed and a beep is generated while the
instrument performs a self test.
•The instrument will display “ ” blinking until initialization is complete.
•After a few seconds “Cond” message appears on the LCD to inform
the user that the probe is in auto-conditioning (automatic polarization)
mode.
•When this message disappears, the probe is polarized and the
instrument can be calibrated.
•If the probe is disconnected, the meter will display “----”.
PROBE POLARIZATION
The probe is under polarization with a fixed voltage of approximately
800 mV.
Probe polarization is essential for stable measurements with the same
recurring degree of accuracy.
With the probe properly polarized, oxygen is continually consumed when
it passes through the sensitive diaphragm and dissolves in the electrolyte
solution contained in the probe.
If polarization is interrupted, the electrolyte solution continues to be
enriched with oxygen until it reaches an equilibrium with the surrounding
solution.
Whenever measurements are taken with a non-polarized probe, the
oxygen level revealed is both that of the tested solution, as well as that
present in the electrolyte solution. This reading is incorrect.
The calibration of this instrument is very simple.
Before proceeding with the calibration, make sure the probe is ready for
measurements (see page 7), i.e. the membrane cap is filled with electrolyte
and the probe is connected to the meter and properly polarized.
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SALINITY AND ALTITUDE COMPENSATION
If the sample contains significant concentration of salinity or if you are
performing measurements at an altitude different from sea level, the
read out values must be corrected, taking into account the lower degree
of oxygen solubility in these situations (see pages 15-16).
Remember to set the altitude and/or the salinity before taking any DO
measurements. The meter will automatically compensate for these factors.
DO MEASUREMENTS
Make sure that the instrument has been calibrated and
the protective cap has been removed.
•Submerse the tip of the probe in the sample to be
tested. Allow approximately one minute for the reading
to stabilize.
•The Dissolved Oxygen value (in %) is displayed on the primary LCD
and the temperature on the secondary LCD.
•Press RANGE to change the reading from % to ppm and vice-versa.
For accurate Dissolved Oxygen measurements, a water movement of
0.3 m/s is required. This is to ensure that the oxygen-depleted
membrane surface is constantly replenished. A moving stream will
provide adequate circulation.
The use of a magnetic stirrer to ensure a certain fluid velocity is
recommended.
For an accurate calibration, it is recommended to wait at least 15 minutes
to ensure precise conditioning of the probe.
Keep the protective cap on during polarization time and remove it for
calibration and measurements. Follow the calibration procedure (see
page 10).
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TEMPERATURE MEASUREMENTS
The probe has a built-in temperature sensor.
The measured temperature is indicated on the secondary LCD as shown
above.
Allow the probe to reach thermal equilibrium before taking any measurement.
This can take several minutes. The greater the difference between the
temperature at which the probe was stored and the temperature of the
sample, the longer the time will be.
Note:If “----” is displayed, the DO probe is not properly connected. This
also indicates the posibility of a broken probe cable. If temperature
displayed blinking, the temperature is out of range.
DO CALIBRATIONDO CALIBRATION
DO CALIBRATIONDO CALIBRATION
DO CALIBRATION
Calibrate the instrument frequently, especially if high accuracy is
required.
The instrument can be calibrated in maximum 2 points: 0.0% (zero
calibration) and 100.0% (slope calibration).
The zero calibration of the HI 2400 is very stable, therefore this procedure
needs to be performed only whenever the probe or the membrane is
replaced.
However, because the slope calibration is more critical, it is recommended
to perform this procedure every week.
INITIAL PREPARATION
•Pour small quantities of HI 7040 Zero Oxygen
solution into a beaker. If possible, use a plastic
beaker to minimize any EMC interferences.
•Make sure the probe is ready for measurements
(see probe preparation on page 7), i.e. the
membrane is filled with electrolyte and the probe
is connected to the meter.
•Switch the meter on by pressing the ON/OFF
switch.
•For an accurate calibration, it is recommended
to wait for at least 15 minutes to ensure precise
conditioning of the probe.
•Remove the protective cap from the DO probe.
•Set the appropriate altitude factor (see page 15). Make sure the
salinity factor is set to zero (see page 16).
HI 7040
HI 7040
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ZERO CALIBRATION
•Submerse the probe into HI 7040 zero oxygen
solution and stir gently for 2-3 minutes.
•Press CAL. The “~” and “ ” tags will blink on the
LCD until the reading is stable.
•When the reading is stable, “CFM” starts blinking.
Press CFM to confirm the “0.0%” DO calibration.
•If the reading is within the limits (±15% f.s.), the
meter stores the value (and adjusts the slope point).
•Press CAL. The instrument will return to measurement
mode and will memorize the zero calibration data.
For a two-point calibration do not press CAL and
follow the procedure below.
SLOPE CALIBRATION
It is suggested to perform the slope calibration in air.
•Rinse the probe in clean water to remove any residual
zero oxygen solution.
Note:If you did not perform the zero calibration procedure, press CAL
and then the ARROW keys to select the 100% DO calibration
point.
•Dry the probe tip and allow a few seconds for the LCD reading to
stabilize. The “~~
~~
~” and “ ” tags will blink until the reading is
stable.
•When the reading is stable, “CFM” tag starts blinking. Press CFM to
confirm the “100.0%” DO calibration.
•If the reading is within the limits (±15% f.s.), the
meter stores the value (and adjusts the slope point).
OR
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•The instrument stores the slope calibration data and returns to
measurement mode.
Notes:•If the reading is not close to the selected value, “WRONG“
tag will blink.
•If the temperature goes out of range during calibration the
“WRONG”, temperature unit tag and both measurements
will blink.
•HI 2400 has automatic buffer recognition function. If the
ARROW keys are pressed to select the desired calibration
value, the automatic buffer recognition function is disabled.
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GOOD LABORATORY PRACTICE (GLP)GOOD LABORATORY PRACTICE (GLP)
GOOD LABORATORY PRACTICE (GLP)GOOD LABORATORY PRACTICE (GLP)
GOOD LABORATORY PRACTICE (GLP)
GLP is a set of functions that allows storage and retrieval of data
regarding the maintenance and status of the system.
All data regarding DO calibration is stored for the user to review when
necessary.
LAST DO CALIBRATION DATA
The last DO calibration data is stored automatically after a successful
calibration. To view the DO calibration data, press GLP when the
instrument is in measurement mode.
The instrument will display the time (hh:mm) of the last calibration.
Press the ARROW keys to view the next calibration parameter.
Pressing the key:
•The date of the calibration.
•The calibration standards.
•Press SETUP to view the temperature of the calibration.
•The altitude value.
•The salinity value.
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SETUPSETUP
SETUPSETUP
SETUP
Setup mode allows viewing and modifying the following parameters:
•Salinity Factor
•Altitude Factor
•Log Interval
•Current Time (hour & minute)
•Current Date (month, day & year)
•Beep Status
•Instrument ID
•Temperature Unit
To enter the Setup mode press SETUP while the instrument is in
measurement mode. Press SETUP again to exit SETUP mode.
Select a parameter with the ARROW keys.
Press CAL if you want to change a parameter value. The selected
parameter will blink.
Press RANGE to toggle between displayed parameters.
Press the ARROW keys to increase or decrease the displayed value.
Press CFM to save the modified value or CAL to escape.
Press the ARROW keys to select the next/previous parameter.
SALINITY FACTOR
Press CAL when the salinity factor is displayed. The salinity factor (“0” to
“40” g/l) and the “CFM” tag will start blinking.
Press ARROW keys to change the salinity factor value.
Press CFM to save the modified value or press CAL to escape without
saving.
The salinity affects the DO concentration, decreasing its value. The next
table shows the maximum oxygen solubility at various temperatures and
salinity levels.
•The instrument ID.
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Cº leveLaeSta)l/g(ytinilaS Fº
l/g0 l/g01 l/g02 l/g03 l/g53
0 06.41 46.31 47.21 09.11 05.11 0.23
2 18.31 19.21 70.21 92.11 19.01 6.53
4 90.31 52.21 74.11 37.01 83.01 2.93
6 44.21 56.11 19.01 22.01 98.9 8.24
8 38.11 90.11 04.01 57.9 44.9 4.64
01 82.11 85.01 39.9 23.9 30.9 0.05
21 77.01 11.01 05.9 29.8 56.8 6.35
41 92.01 86.9 01.9 55.8 03.8 2.75
61 68.9 82.9 37.8 12.8 79.7 8.06
81 54.9 09.8 93.8 09.7 66.7 4.46
02 80.9 65.8 70.8 06.7 83.7 0.86
22 37.8 32.8 77.7 33.7 21.7 6.17
42 04.8 39.7 94.7 70.7 78.6 2.57
52 42.8 97.7 63.7 59.6 57.6 0.77
62 90.8 56.7 32.7 38.6 46.6 8.87
82 18.7 83.7 89.6 16.6 24.6 4.28
03 45.7 41.7 57.6 93.6 22.6 0.68
23 92.7 09.6 45.6 91.6 30.6 6.98
43 50.7 86.6 33.6 10.6 58.5 2.39
63 28.6 74.6 41.6 38.5 86.5 8.69
83 16.6 82.6 69.5 66.5 15.5 4.001
04 14.6 90.6 97.5 05.5 63.5 0.401
24 22.6 39.5 36.5 53.5 22.5 6.701
44 40.6 77.5 84.5 12.5 90.5 2.111
64 78.5 16.5 33.5 70.5 79.4 8.411
84 07.5 74.5 02.5 59.4 58.4 4.811
05 45.5 33.5 70.5 38.4 57.4 0.221
Note:The relationship between salinity and chlorinity for sea water is
given by the equation below:
Salinity (g/l) = 1.80655 Chlorinity (g/l)
ALTITUDE FACTOR
Press CAL when the altitude factor is displayed. The altitude factor
(“0”to “4000”m, in steps of 100 m; 1 meter = 3.28 feet) and the
“CFM” tag will start blinking.
Press the ARROW keys to change the altitude factor value.
Press CFM to save the modified value or press CAL to escape without saving.
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Cº
leveLaeSevobasreteM,edutitlA
Fº
m0 003
m
006
m
009
m
0021
m
0051
m
0081
m
0012
m
0042
m
0072
m
0003
m
0033
m
0063
m
0093
m
0004
m
0 6.41 1.41 6.31 1.31 6.21 1.21 7.11 2.11 8.01 4.01 0.01 7.9 3.9 0.9 9.8 0.23
2 8.31 3.31 8.21 4.21 9.11 5.11 0.11 6.01 2.01 9.9 5.9 2.9 8.8 5.8 4.8 6.53
4 1.31 6.21 2.21 7.11 3.11 9.01 5.01 1.01 7.9 3.9 0.9 7.8 4.8 0.8 9.7 2.93
6 4.21 0.21 5.11 1.11 7.01 3.01 9.9 6.9 2.9 9.8 6.8 2.8 9.7 6.7 5.7 8.24
8 8.11 4.11 0.11 6.01 2.01 8.9 5.9 1.9 8.8 4.8 1.8 8.7 5.7 3.7 2.7 4.64
01 3.11 9.01 5.01 1.01 7.9 4.9 0.9 7.8 4.8 1.8 8.7 5.7 2.7 9.6 8.6 0.05
21 8.01 4.01 0.01 6.9 3.9 9.8 6.8 3.8 0.8 7.7 4.7 1.7 9.6 6.6 5.6 6.35
41 3.01 9.9 6.9 2.9 9.8 5.8 2.8 9.7 6.7 4.7 1.7 8.6 6.6 3.6 2.6 2.75
61 9.9 5.9 2.9 8.8 5.8 2.8 9.7 6.7 3.7 0.7 8.6 5.6 3.6 1.6 0.6 8.06
81 5.9 1.9 8.8 5.8 1.8 8.7 6.7 3.7 0.7 8.6 5.6 3.6 0.6 8.5 7.5 4.46
02 1.9 8.8 4.8 1.8 8.7 5.7 3.7 0.7 7.6 5.6 2.6 0.6 8.5 6.5 5.5 0.86
22 7.8 4.8 1.8 8.7 5.7 2.7 0.7 7.6 5.6 2.6 0.6 8.5 6.5 4.5 3.5 6.17
42 4.8 1.8 8.7 5.7 2.7 0.7 7.6 5.6 2.6 0.6 8.5 6.5 4.5 2.5 1.5 2.57
52 3.8 0.8 7.7 4.7 1.7 8.6 6.6 4.6 1.6 9.5 7.5 5.5 3.5 1.5 0.5 0.77
62 1.8 8.7 5.7 2.7 0.7 7.6 5.6 2.6 0.6 8.5 6.5 4.5 2.5 0.5 9.4 8.87
82 8.7 5.7 3.7 0.7 7.6 5.6 2.6 0.6 8.5 6.5 4.5 2.5 0.5 8.4 7.4 4.28
03 6.7 3.7 0.7 8.6 5.6 3.6 0.6 8.5 6.5 4.5 2.5 0.5 8.4 6.4 6.4 0.68
23 3.7 0.7 8.6 5.6 3.6 1.6 8.5 6.5 4.5 2.5 0.5 8.4 7.4 5.4 4.4 6.98
43 1.7 8.6 6.6 3.6 1.6 9.5 6.5 4.5 2.5 0.5 9.4 7.4 5.4 3.4 3.4 2.39
63 8.6 6.6 3.6 1.6 9.5 7.5 5.5 3.5 1.5 9.4 7.4 5.4 4.4 2.4 1.4 8.69
83 6.6 4.6 1.6 9.5 7.5 5.5 3.5 1.5 9.4 7.4 5.4 4.4 2.4 1.4 0.4 4.001
04 4.6 2.6 9.5 7.5 5.5 3.5 1.5 9.4 7.4 6.4 4.4 2.4 1.4 9.3 9.3 4.401
24 2.6 0.6 8.5 6.5 3.5 2.5 0.5 8.4 6.4 4.4 3.4 1.4 0.4 8.3 8.3 6.701
44 0.6 8.5 6.5 4.5 2.5 0.5 8.4 6.4 5.4 3.4 1.4 0.4 8.3 7.3 7.3 2.111
64 8.5 6.5 4.5 2.5 0.5 8.4 7.4 5.4 3.4 2.4 0.4 9.3 7.3 6.3 5.3 8.411
84 7.5 5.5 3.5 1.5 9.4 7.4 5.4 4.4 2.4 0.4 9.3 7.3 6.3 5.3 4.3 4.811
05 5.5 3.5 1.5 9.4 7.4 6.4 4.4 2.4 1.4 9.3 8.3 6.3 5.3 4.3 3.3 0.221
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LOG INTERVAL
Press CAL when log interval is displayed. The log interval and “CFM”
tag is displayed blinking.
Press the ARROW keys to change the custom buffer value.
Press CFM to confirm the selection.
Press CAL to escape without saving.
CURRENT TIME
Press CAL when the current time is displayed. The hour and “CFM” tag will
start blinking.
Press the ARROW keys to change the hour.
Press RANGE. The minutes will start blinking.
Press the ARROW keys to change the minutes.
Press CFM to save the modified value.
Press CAL to escape without saving.
CURRENT DATE
Press CAL when the current date is displayed. The month and “CFM” tag
will start blinking.
Press the ARROW keys to change the month.
Press RANGE. The day and “CFM” tag will start blinking.
Press the ARROW keys to change the day.
Press RANGE. The year and “CFM” tag will start blinking.
Press the ARROW keys to change the year.
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INSTRUMENT ID
Press CAL when “InId” is displayed. The instrument ID (“0000“ to
“9999“) and “CFM” tag will start blinking.
Press the ARROW keys to change the instrument ID value.
Press CFM to save the modified instrument ID value.
Press CAL to escape without saving.
Note:The instrument ID is downloaded to a PC as part of a logged
data, set to identify its origin.
TEMPERATURE UNIT
Press CAL when “Unit“ is displayed. The temperature unit and “CFM”
tag will start blinking.
Press the ARROW keys to change the option.
Press CFM to save the modified temperature unit.
Press CAL to escape without saving.
BEEP STATUS
Press CAL when the beep status is displayed. The beep status (“ON” or
“OFF”) and “CFM” tag will start blinking.
Press the ARROW keys to change the beep status.
Press CFM to save the modified value or press CAL to escape without
saving.
Press CFM to save the modified value.
Press CAL to escape without saving.
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LOGGINGLOGGING
LOGGINGLOGGING
LOGGING
This function allows the user to log DO (in ppm or %) together with
temperature automatically, for long periods of time. All logged data can
be stored into a PC through the USB port.
The memory used for storing the logged data is divided in 32 pages. The
capacity of each page is 250 samples. The lot number goes from 1 to
100. The maximum capacity of the log memory is 8000 samples. Each
time a new lot starts, it automatically starts from a new page. When the
samples collected for a single lot reach the limit (8000 samples) or all
memory pages are occupied, the meter stops logging automatically.
The appropriate logging interval can be set between 5, 10, 30 seconds
or 1, 2, 5, 10, 15, 30, 60, 120, 180 minutes (see SETUP section for
details).
LOGGING THE CURRENT DATA
To start the Auto LOG mode press LOGwhile in measurement
mode.
When the selected interval is reached the instrument will display the
current lot number on the primary LCD line, the record number on the
secondary LCD line and the LOG tag ( see example below: Lot 15 record 22)
followed by the number of free records on the corresponding memory
space.
If there are less than 6 memory locations remaining, the record number
and “Lo” message will be displayed to alert the user.
To stop the Auto LOG mode press LOG again. The “LOG” tag will be
cleared.
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If the log space is full, the “FULL LOG” message will be displayed and
no more data will be saved.
Note:When pressing any key that is not active, while lot logging is
running, the following message is displayed for a few seconds.
VIEW LOGGED DATA
Press the RCL key while in measurement mode to retrieve the stored
information.
If no lots are memorized, the next messages will be displayed:
Otherwise, the instrument will display “L” and the lot number on the
primary LCD and the number of records on the secondary LCD, “RCL” tag
and “CFM” blinking.
Press ARROW keys to select different lot.
Press CFM to view record information. Then the record information will
appear. To view the record number at any time just press the SETUP
key.
Use the ARROW keys to scroll through the records.
To view additional information press RANGE:
•The time on the primary LCD, along with “TIME” tag and the
seconds on the secondary LCD.
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