Hanna Instruments HI 2222 User manual

1
Instruction Manual
HI 2222
pH/mV/ºC
Bench Meter
with Calibration Check

2
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].
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
WARRANTY ............................................................................................ 2
PRELIMINARY EXAMINATION ..................................................................... 3
GENERAL DESCRIPTION ........................................................................... 3
FUNCTIONAL DESCRIPTION ....................................................................... 4
HI 2222 SPECIFICATIONS ........................................................................ 5
OPERATIONAL GUIDE ............................................................................... 6
pH CALIBRATION ..................................................................................... 9
ENHANCED CALIBRATION MESSAGES ....................................................... 13
ELECTRODE CONDITION & ELECTRODE RESPONSE TIME ............................ 15
pH BUFFER TEMPERATURE DEPENDENCE ................................................ 16
GOOD LABORATORY PRACTICE (GLP) ....................................................... 17
LOGGING.............................................................................................. 19
SETUP .................................................................................................. 22
TEMPERATURE CALIBRATION (for technical personnel only) ......................... 25
mV CALIBRATION (for technical personnel only) ......................................... 26
PC INTERFACE ....................................................................................... 27
ELECTRODE CONDITIONING & MAINTENANCE ........................................... 31
TROUBLESHOOTING GUIDE .................................................................... 34
TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ........................... 35
ACCESSORIES ........................................................................................ 36
RECOMMENDATIONS FOR USERS ............................................................ 39
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY
HI 2222 is guaranteed for two years against defects in workmanship and
materials when used for their intended purpose and maintained according
to instructions. The electrodes and the probes are guaranteed for a
period of six months. This warranty is limited to repair or replacement free
of charge.
Damage due to accidents, misuse, tampering or lack of prescribed
maintenance are 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 packaged for complete protection.

3
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
Remove the instrument from the packing material and examine it carefully
to make sure that no damage has occurred during shipping. If there is any
damage, notify your Dealer or the nearest Hanna Customer Service Center.
Each instrument is supplied complete with:
•HI 1048P Glass-body Combination pH Electrode with 1 m (3.3 “)
cable
•HI 7662 Temperature Probe
•HI 76404N Electrode Holder
•pH 3.00 & 7.01 Buffer Solutions (20 mL each)
•HI 700365 Cleaning Solution for wine deposits (2x20 mL)
•HI 700636 Cleaning Solution for wine stains (2x20 mL)
•HI 7082 Electrode Refiling 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 the
original packing with the supplied accessories.
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
HI 2222 is a logging microprocessor-based pH/ORP/temperature bench
meters with Calibration Check.
Calibration Check performs a set of diagnostic tests during calibration
using the history of electrode slope and offset to detect problems that can
cause loss of accuracy.
Calibration Check Features are:
• Enhanced Calibration Messages
During calibration the user is warned if one or more parameters are not suitable
to perform an accurate calibration.
• Electrode Condition on LCD Display
Determined from the electrode offset and slope.
• Electrode response time on LCD Display
Determined from electrode performance during calibration.
Other features include: up to two point calibration with seven memorized
buffers (1.68, 3.00, 6.86, 7.01, 9.18, 10.01 and 12.45 pH), logging
up to 100 samples, GLP, calibration due alarm, pH reading with manual
or automatic temperature compensation and PC software interface.

4
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
Front Panel
Rear Panel
1) Liquid Crystal Display (LCD).
2) CAL key, to enter and exit calibration mode.
3) CFM/GLP key, to confirm calibration, different 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, switch to focused data in
SETUP or toggle between buffer value and temperature during
calibration.
8) LOG/CLR key, to store a value into memory, to clear pH calibration,
or to delete log records.
9) RCL key, memory recall.
10) ON/OFF switch.
11) Power supply socket.
12) USB connector.
13) BNC electrode connector.
14) Temperature probe socket.
15) Electrode reference socket.

5
HI 2222HI 2222
HI 2222HI 2222
HI 2222
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
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6
POWER CONNECTIONPOWER CONNECTION
POWER CONNECTIONPOWER CONNECTION
POWER CONNECTION
Plug the 12 VDC adapter into the power supply socket.
Notes: • These instruments use non volatile memory to retain the pH,
mV, temperature calibrations and all other settings, even
when unplugged.
• Make sure a fuse protects the mains line.
ELECTRODE AND PROBE CONNECTIONSELECTRODE AND PROBE CONNECTIONS
ELECTRODE AND PROBE CONNECTIONSELECTRODE AND PROBE CONNECTIONS
ELECTRODE AND PROBE CONNECTIONS
For HANNA P Type pH or ORP electrodes (with internal reference) connect
the electrode’s BNC to the socket on the back of the instrument and the
pin to the reference socket.
Note: Electrode condition and response information is displayed on the
bar graph gauges during the day the calibration is performed,
only if HANNA P type (PIN) electrodes are used.
If the electrode is not recognized as a HANNA P type electrode, the
bar graph gauges will blink (25 seconds OFF, 4 seconds ON, full
bar graph).
For temperature measurement and automatic temperature compensation
connect the temperature probe to the appropriate socket.
INSTRUMENT STINSTRUMENT ST
INSTRUMENT STINSTRUMENT ST
INSTRUMENT STARTART
ARTART
ART-UP-UP
-UP-UP
-UP
• Turn the instrument on by pressing the ON/OFF switch located on
the rear panel.
• All LCD tags are displayed and a beep is sounded while the instrument
performs a self test.
• The instrument will display “LoAd” message and “ ” blinking until
initialization is complete.
• The “Unscrew electrode refilling cap” message reminds the user
to loosen or remove the electrode refilling cap to improve the electrode’s
response time.
• The instrument automatically defaults to pH measurement mode
unless a HANNA P type ORP electrode is detected.
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE

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pH MEASUREMENTpH MEASUREMENT
pH MEASUREMENTpH MEASUREMENT
pH MEASUREMENT
Make sure the instrument has been calibrated
before taking pH measurements.
• Submerse the tip of a properly conditioned
electrode (see page 31) and the temperature
probe approximately 3 cm (1¼”) into the sample
to be tested and stir gently.
Allow time for the electrode to stabilize.
• The pH is displayed on the primary LCD and the temperature on the
secondary LCD.
• The pH reading is out of range, the closest full-scale value will be
displayed blinking on the primary LCD.
• It is also possible to view the mV reading by pressing the RANGE key.
Ifmeasurements aretaken successively in different samples, it isrecommended
to rinse the electrode thoroughly with deionized water or tap water and
then with some of the next sample to prevent cross-contamination.
The pH reading is affected by temperature. In order to measure the pH
accurately, this temperature effect must be compensated for. To use the
Automatic Temperature Compensation feature, connect and submerse the
HI 7662 temperature probe into the sample as close to the electrode as
possible and wait for a few minutes.
If the temperature of the sample is known, manual
temperature compensation can be used by disconnecting
the temperature probe.
The display will show the last recorded temperature
reading with the “°C” symbol blinking.
The temperature can now be adjusted with the ARROW keys (from
-20.0 ºC to 120.0 ºC).
C
MTC
C
SLOW FAST POOR GOOD
mV
C
ATC
3 cm
(1¼")

8
3 cm
(1¼")
ORP MEASUREMENTSORP MEASUREMENTS
ORP MEASUREMENTSORP MEASUREMENTS
ORP MEASUREMENTS
An optional ORP electrode must be used to perform ORP measurements
(see Accessories).
Oxidation-Reduction Potential (REDOX) measurements provide the
quantification of the oxidizing or reducing power of the tested sample.
The surface of the ORP electrode must be clean and smooth in order to
obtain an accurate measurement.
Pretreatment solutions are available to condition the electrode and speed
up the response time.
• The instrument automatically defaults to the
mV measurement mode if HANNA P type ORP
electrode is detected.
• Submerse the ORP electrode tip (3 cm/1¼”)
into the sample. Allow a few minutes for the
reading to stabilize.
• The instrument displays the mV reading on the primary LCD.
• If the reading is out of range, the closest full-scale value will be
displayed blinking on the primary LCD.
TAKING TEMPERATURE MEASUREMENTSTAKING TEMPERATURE MEASUREMENTS
TAKING TEMPERATURE MEASUREMENTSTAKING TEMPERATURE MEASUREMENTS
TAKING TEMPERATURE MEASUREMENTS
Connect the HI 7662 temperature probe and turn the
instrument on. Dip the temperature probe into the sample
and allow the reading on the secondary LCD to stabilize.

9
Calibrate the instrument frequently, especially if high accuracy is
required. For best results and constant display of electrode condition
and electrode response on the bar graph gauges, daily calibration is
recommended.
The instrument should be re-calibrated:
• Whenever the pH electrode is replaced.
• At least once a day.
• After testing aggressive chemicals.
• If high accuracy is required.
• If “CAL DUE” message is displayed during measurement.
Every time you calibrate the instrument use fresh buffers and perform an
electrode cleaning procedure (see page 33).
PREPARATIONPREPARATION
PREPARATIONPREPARATION
PREPARATION
Pour small quantities of the buffer solutions into clean beakers. If possible,
use plastic or glass beakers to minimize any EMC interferences.
For accurate calibration and to minimize cross-contamination, use two
beakers for each buffer solution. One for rinsing the electrode and one for
calibration.
PROCEDUREPROCEDURE
PROCEDUREPROCEDURE
PROCEDURE
A two-point calibration is recommended, however a one-point calibration
will be permitted. Calibration can be performed using the seven
memorized buffers:
•pH 1.68, 3.00, 6.86, 7.01, 9.18, 10.01 and 12.45.
pp
pp
pH CALIBRATIONH CALIBRATION
H CALIBRATIONH CALIBRATION
H CALIBRATION

10
TWO-POINT CALIBRATIONTWO-POINT CALIBRATION
TWO-POINT CALIBRATIONTWO-POINT CALIBRATION
TWO-POINT CALIBRATION
For most applications it is recommended that pH 7.01 or 6.86 buffers be
used as the first calibration point and pH 3.00 (for acidic samples) or pH
9.18/10.01 (for alkaline samples) as the second calibration point.
Note: The pH 12.45 buffer is not for general measurement; use only if
the sample is very alkaline to avoid sodium error.
• Submerse the pH electrode and the temperature probe approximately
3 cm (1¼”) into a buffer solution and stir gently. The temperature
probe should be close to the pH electrode.
• Press the CAL key. “CAL” and “pH” tags will be on, and the
“CLEAR CAL if new electrode” tag will blink.
• Press the CLR key if you are using a new electrode or want to clear
the calibration history. The instrument will display the “donE”
message for a few seconds.
• Press the CAL key, or wait a few seconds to continue.
It is very important to clear the calibration history when a new electrode
is used because all error and warning messages that appear during
calibration depend on the calibration history.
Note: • The “CLEAR CAL if new electrode” will only appear if the
instrument has been previously calibrated.
• The “CAL”, “pH” and “BUFFER” tags will appear and the
“7.01” buffer will be displayed on the secondary LCD.
• Press the ARROW keys to select a different buffer value, if
necessary.
• The “ ” tag will blink until the reading has stabilized.
CLEAR CAL if new electrode
pH
CAL

11
• When the reading is stable and close to the selected buffer, the
“CFM” tag will blink and if enabled, an audible signal will sound.
• Press the CFM key to confirm the calibration. The calibrated value
will be displayed on the primary LCD and the second expected buffer
value on the secondary LCD.
• After the first calibration point is confirmed, submerse the pH electrode
and the temperature probe approximately 3 cm (1¼”) into the
second buffer solution and stir gently. The temperature probe should
be close to the pH electrode.
• If necessary, press the ARROW keys to select a different buffer value.
Note: The instrument will automatically skip the buffer used for the first
point. It also skips 6.86 if 7.01 was used, and vice versa.
Likewise, it will skip 9.18 if 10.01 has been used, and vice versa.
• The “ ” tag will blink on the LCD until the reading is stable.
• When the reading is stable and close to the selected buffer the “CFM”
tag will blink.
• Press CFM to confirm calibration.
• The calibrated value is then displayed on the
primary LCD and and the third expected buffer
value on the secondary LCD.

12
ONE-POINT CALIBRATIONONE-POINT CALIBRATION
ONE-POINT CALIBRATIONONE-POINT CALIBRATION
ONE-POINT CALIBRATION
If the “Pnt” option is selected, the new calibration point overrides an
existing one. The adjacent slopes will be reevaluated.
If the “OFFS” option is selected, an electrode offset correction is performed.
The adjacent slopes will remain unchanged.
• Proceed as described in “TWO-POINT CALIBRATION” section.
• Press CAL after the first calibration point was confirmed. The
instrument will memorize the one-point calibration data and return
to measurement mode.
Notes: • To clear calibration parameters for all uncalibrated buffers
starting with current buffer, press CLR. The calibration
will continue from the current point. If this procedure is
performed while calibrating in the first calibration point, the
instrument returns to measurement mode.
• Press RANGE to toggle between pH buffer
and temperature reading.

13
The stored calibration history to used issue error and warning messages
during calibration to help ensure the highest accuracy.
As electrode aging is normally a slow process, substantial changes
from previous calibrations are likely due to a temporary problem
with the electrode or buffers.
ERROR MESSAGES
Error messages appear if one or all of the calibration parameters are out
of accepted windows. Calibration can not continue when these errors are
displayed.
WRONG BUFFERWRONG BUFFER
WRONG BUFFERWRONG BUFFER
WRONG BUFFER
This message appears when the difference between the pH reading and
the value of the selected buffer is too big. If this error message is
displayed, check if you have selected the proper calibration buffer.
CLEAN ELECTRODECLEAN ELECTRODE
CLEAN ELECTRODECLEAN ELECTRODE
CLEAN ELECTRODE
This error message indicates a bad electrode condition (offset out of
accepted window, or slope under the accepted lower limit).
Clean the electrode according to the Cleaning Procedure on page 33 to
improve its condition and repeat the calibration. This ensures the
removal of film, dirt or deposits on the glass bulb and reference junction.
CHECK ELECTRODECHECK ELECTRODE
CHECK ELECTRODECHECK ELECTRODE
CHECK ELECTRODE alternating with CHECK BUFFERCHECK BUFFER
CHECK BUFFERCHECK BUFFER
CHECK BUFFER
This error message appears when electrode slope exceeds the highest
accepted slope limit. You should check your electrode and use fresh buffer.
ELECTRODEELECTRODE
ELECTRODEELECTRODE
ELECTRODE
This message appears if the cleaning procedure performed as a result of
the above two messages is found by the instrument to be unsuccessful.
Replace the electrode.
ENHANCED CALIBRATION MESSAGESENHANCED CALIBRATION MESSAGES
ENHANCED CALIBRATION MESSAGESENHANCED CALIBRATION MESSAGES
ENHANCED CALIBRATION MESSAGES

14
BUFFER TEMPERATUREBUFFER TEMPERATURE
BUFFER TEMPERATUREBUFFER TEMPERATURE
BUFFER TEMPERATURE
This message appears if the temperature of the buffer is outside the
defined buffer temperature range.
WARNING MESSAGES
During calibration, the Calibration Check feature analyzes the electrode
calibration history and warns the user when problems have been
detected. It is possible to over ride the warning messages and confirm the
calibration but it is not recommended.
CLEAN ELECTRODECLEAN ELECTRODE
CLEAN ELECTRODECLEAN ELECTRODE
CLEAN ELECTRODE
This warning appears during Calibration Check for the second calibration
buffer when the instrument has detected a small variation of offset or
both offset and slope parameters. This variation may result from dirt on
the electrode. Refer to the electrode cleaning procedure. This ensures the
removal of film, dirt or deposits on the glass bulb and reference junction.
CLEAN ELECTRODECLEAN ELECTRODE
CLEAN ELECTRODECLEAN ELECTRODE
CLEAN ELECTRODE alternating with CHECK BUFFERCHECK BUFFER
CHECK BUFFERCHECK BUFFER
CHECK BUFFER
This warning appears during Calibration Check in the first calibration
buffer as a result of unacceptable offset variation or in the second
calibration buffer as a result of unacceptable slope variation. This
variation may result from dirt on the electrode or contaminated buffer.
Refer to the electrode cleaning procedure or use fresh buffer.
CONTAMINATED BUFFERCONTAMINATED BUFFER
CONTAMINATED BUFFERCONTAMINATED BUFFER
CONTAMINATED BUFFER
This warning message appears in order to alert that the buffer could be
contaminated. Refresh your buffer and continue the calibration procedure.

15
When using an appropriate HANNA P Type BNC electrode with pin,
HI 2222 will assess electrode condition and response time during each
calibration, the calibration status is displayed for the rest of the day.
The response gauge is a function of the stabilization time between the
first and second calibration buffers. These gauges reflect electrode perfor-
mance and should be expected to slowly decrease over the life of the
electrode.
The condition gauge show the electrode’s condition at the time of
calibration only.
For a continuous display of electrode condition and response daily
calibration is necessary. This information can also be viewed in the GLP
data.
If the instrument is not calibrated, the calibration history was deleted it
has been calibrated only at one point, the two-point calibration was not
performed using pH 7.01 and pH 3.00 buffers, the electrode condition
and the electrode response gauges will be empty.
When the instrument cannot evaluate the electrode response, the electrode
response gauge will be empty.
If the electrode is in a very poor condition the first condition segment will
blink.
If electrode response is very slow the first response segment will blink.
ELECTRODE CONDITION &ELECTRODE CONDITION &
ELECTRODE CONDITION &ELECTRODE CONDITION &
ELECTRODE CONDITION &
ELECTRODE RESPONSE TIMEELECTRODE RESPONSE TIME
ELECTRODE RESPONSE TIMEELECTRODE RESPONSE TIME
ELECTRODE RESPONSE TIME
SLOW FAST POOR GOOD
SLOW FAST POOR GOOD

16
pp
pp
pH BUFFER TEMPERATUREH BUFFER TEMPERATURE
H BUFFER TEMPERATUREH BUFFER TEMPERATURE
H BUFFER TEMPERATURE
DEPENDENCEDEPENDENCE
DEPENDENCEDEPENDENCE
DEPENDENCE
The temperature has an effect on pH. The calibration buffer solutions
are affected by temperature changes to a lesser degree than normal
solutions. During calibration the instrument will automatically calibrate
to the pH value corresponding to the measured or set temperature.
During calibration the instrument will display the pH buffer value at 25 ºC.
PMETSREFFUBHp
CºFº86.100.368.610.781.910.0154.21
02376.180.389.631.764.923.0183.31
51476.160.359.601.793.942.0181.31
010576.140.329
.670.733.981.0199.21
519576.120.309.650.772.921.0108.21
028686.110.388.630.722.960.0126.21
527786.100.368.610.781.910.0154.21
03688
6.100.358.600.741.969.992.21
535996.100.348.699.611.929.931.21
04401 96.199.248.689.670.988.989.11
54311 07.199.238.689.640.958.938.1
1
05221 17.100.338.689.610.928.907.11
55131 27.100.348.689.699.897.975.11
06041 27.100.348.689.679.877.944.11
56941 37.100.348.699.659.
867.923.11
07851 47.100.358.699.639.857.912.11
57761 67.110.368.600.719.847.901.11
08671 77.110.378.610.798.847.900.11
58581 87.110.378
.620.778.847.919.01
09491 97.100.388.630.758.857.928.01
59302 18.100.398.640.738.867.937.01

17
GLP is a set of functions that allows the storage and retrieval of data
regarding the maintenance and status of the electrode.
All data regarding the last calibration is stored for the user to review
when necessary.
EXPIRED CALIBRATIONEXPIRED CALIBRATION
EXPIRED CALIBRATIONEXPIRED CALIBRATION
EXPIRED CALIBRATION
This instrument allow the user to set the number of days before the next
required calibration. This value can be set from 1 to 7 days. The default
setting is OFF (disabled).
The ”CAL DUE” will blink to warn the user that the instrument should
be recalibrated.
For example, if a 4 days time out has been selected, the instrument will
issue the alarm exactly 4 days after the last calibration.
If the expiration value is changed (e.g. to 5 days), then the alarm will
be immediately recalculated and appear 5 days after the last calibration.
Notes: • If the instrument was not calibrated, or if the calibration
history was deleted, the ”CAL DUE“ message will be
displayed even if this feature is disabled in the SETUP menu.
• If the instrument was calibrated using an electrode with
pin and the electrode is changed with an electrode without
pin or vice-versa ”CAL DUE”will blink. This feature helps
ensure use of a calibrated instrument.
pp
pp
pH CALIBRATION DATAH CALIBRATION DATA
H CALIBRATION DATAH CALIBRATION DATA
H CALIBRATION DATA
Calibration data is stored automatically after a successful calibration.
To view the pH calibration data, press the GLP key when the instrument
is in pH measuring mode.
The instrument will display the time of the last calibration.
Use the ARROW keys to scroll through the calibration data:
••
••
• The time (hh:mm).
••
••
• The date (yyyy / mm.dd).
••
••
• The pH calibration offset.
GOOD LABORATORY PRACTICE (GLP)GOOD LABORATORY PRACTICE (GLP)
GOOD LABORATORY PRACTICE (GLP)GOOD LABORATORY PRACTICE (GLP)
GOOD LABORATORY PRACTICE (GLP)

18
••
••
• The pH calibration slope in mV/pH normalized to 25 °C (the
percentage is referred to the ideal value of 59.16 mV/pH).
Note: If you calibrate using electrodes with pin the electrode condition
and response gauges appear while the offset and slope are
displayed.
• The pH calibration buffers in calibrating order and with the selected
resolutions used during calibration.
The first pH calibration buffer:
The second pH calibration buffer:
• If “no bUF” message appears on the LCD, the instrument informs
you that the calibration was performed with less than two buffers.
• Calibration Expiration status:
- if disabled.
- or the number of days until the calibration alarm will be displayed,
- or if expired (7 days ago).
• The instrument ID.

19
Up to 100 logged samples can be stored into memory.
LOGGING THE CURRENT DATALOGGING THE CURRENT DATA
LOGGING THE CURRENT DATALOGGING THE CURRENT DATA
LOGGING THE CURRENT DATA
To store the current reading into memory press the LOG key while in
measuring mode.
The instrument will display the current date (mm.dd) on the primary
LCD, the record number on the secondary LCD and the “LOG” tag will
blink for a few seconds (see example below: record No. 27 dated July 14):
If there are less than 5 memory locations remaining, the record number
and the “Lo” message will be displayed, to alert the user.
If the log space is full, the “FULL LOG” message will be displayed and
no more data will be saved.
Along with the current measurement, the date, time, mV value,
temperature and calibration data is stored. If a HANNA P Type ORP
electrode is used pH information is not stored.
VIEW LOGGED DATAVIEW LOGGED DATA
VIEW LOGGED DATAVIEW LOGGED DATA
VIEW LOGGED DATA
Press RCL while in measurement mode to retrieve the stored information.
If no data was logged, the instrument displays:
LOGGINGLOGGING
LOGGINGLOGGING
LOGGING
Notes: • Press GLP to return to measurement mode.
• If calibration has not been performed, the instruments
display “no CAL” message blinking.

20
The instrument will display the logged measurement value on the
primary LCD and the record number on the secondary LCD, along with
the “LOG” and “RCL” tags.
Note: The “LOG”and “RCL” tags remain on LCD while in memory recall
mode.
Press the RCL key to return to measurement mode.
Press the ARROW keys to scroll between same parameter for different
records:
Press the RANGE key to view additional data:
• The mV value on the primary LCD and the temperature on the
secondary LCD.
• The year on the primary LCD and the month and day on the
secondary LCD.
• The hour and minutes on the primary LCD and the record
number on the secondary LCD.
• The calibration offset on the primary LCD and the “oFFS” message
on the secondary LCD.
• The calibration slope on the primary LCD and the “SLoP” message
on the secondary LCD.