GLI International GLI-98144 Operating Manual
Manual No. 98144
Revision 0-401
MODEL GLI-98144
HAND-HELD/PORTABLE
pH/ORP METER
Please read this instruction manual carefully
before using the instrument. This manual will
provide you with all the necessary information
for the correct use of the instrument, as well
as a precise idea of its versatility in a wide
range of applications.
This meter is in compliance with European
Community (CE) directives EN 50081-1 and
EN 50082-1.
TABLE OF CONTENTS
PRELIMINARY EXAMINATION................................. 2
GENERAL DESCRIPTION..................................... 2-3
FUNCTIONAL DESCRIPTION................................... 3
SPECIFICATIONS.....................................................4
INITIAL PREPARATION............................................ 4
SETUP MODE........................................................4-6
TAKING pH MEASUREMENTS................................. 6
TAKING ORP MEASUREMENTS........................... 6-7
TAKING TEMPERATURE MEASUREMENTS........... 7
pH CALIBRATION PROCEDURE ........................... 7-8
mV CALIBRATION PROCEDURE .......................... 8-9
TEMPERATURE CALIBRATION PROCEDURE........ 9
LOGGING FUNCTION ....................................... 10-11
GOOD LABORATORY PRACTICE (GLP) .......... 11-12
LCD BACKLIGHT.................................................... 12
DATA TRANSFER TO PC.................................. 12-13
BATTERY REPLACEMENT ............................... 13-14
TEMPERATURE-RESISTANCE CORRELATION
FOR GLI pH SENSITIVE GLASS........................ 14
ELECTRODE CONDITIONING AND
MAINTENANCE.............................................15-16
WARRANTY............................................................ 16
GLI-1618D-0 Combination pH Electrode
•
with built-in temperature sensor
pH 4.01 buffer
•
pH 7.01 buffer
•
Instruction Manual
•
AA size Alkaline Batteries (four)
•
Rugged Carrying Case.
•
NOTE: Save all packing material until you
are sure that the instrument functions correctly. All defective items
must be returned in their original
packaging together with the supplied
accessories.
GENERAL DESCRIPTION
The GLI-98144 is a portable logging microprocessor-based pH/ORP/temperature meter.
All pH measurements are automatically compensated for temperature (ATC). The
instrument housing is made of rugged, lightweight material, making it truly portable.
Five memorized buffers (4.01, 6.86, 7.01,
9.18 and 10.01pH) and wrong buffer recognition technology make calibration simple and
error free. One or two-point calibration is
possible.
The meters are also equipped with a stability
indicator and backlight feature for comfortable reading even in excessively dark
environments. A user friendly interface provides clear messages regarding errors,
functions and more.
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 the
transit carrier immediately.
Each meter is supplied complete with:
Model GLI-98144 Portable pH/ORP Meter 2 Rev. 0-401
The GLP features provide a guarantee of
data consistency.
Measurements can be performed with laboratory-grade precision in the field as well as
in the laboratory.
An alarm time-out is available to alert the
user if too much time has elapsed since the
last pH calibration and that re-calibration may
be required.
5) ON/OFF key, to turn the meter on and off
6) ALT key, to alternate key function
The meter provides a controlled access to
calibration and GLP settings through a password protection method.
The Battery Error Preventing System (BEPS)
recognizes batteries levels as they become
weaker. To prolong battery life, the backlight
feature is automatically disabled when the
batteries are getting low; a clear indication is
displayed on the LCD to warn the user of this
condition. However, the meter continues to
measure correctly even when the low battery
indication is displayed. The meter automatically switches itself off when the batteries are
too weak to support proper function.
For long term field and lab applications, the
meter can be connected to a 12VDC adapter.
The meter can store measurements in memory at the request of the user for retrieval at a
later time. It will also allow transfer of data to
a computer through the RS232 port.
7) RANGE/GLP key, to select measurement
ranges, display time and date, and view
calibration data (with ALT key)
8) CAL/CALT key, to enter calibration mode
9)
È
CFM key, to move down or confirm
values (with ALT key)
10) LOG/RCL key, to store measurements or
recall measurements (with ALT key)
11) ÇFNC key, to move up or enter setup
mode (with ALT key)
12) LIGHT/DEL key, to turn the LCD backlight on and off and to delete stored data
(with ALT key)
In addition, the meter allows the user to enter
an ID code to uniquely identify the instrument.
Made of tough, lightweight ABS material, the
water-resistant rugged casing is built to last.
The meter is in compliance with IP67 standards: dust-tight, protected against the
effects of temporary immersion in water, and
designed to provide laboratory results and
accuracy under harsh industrial conditions.
FUNCTIONAL DESCRIPTION
(see drawing at right)
1) Power adapter plug
2) RS232 connector
3) Electrode connector
4) Liquid crystal display (LCD)
Rev. 0-401 3 Model GLI-98144 Portable pH/ORP Meter
SPECIFICATIONS
Range pH
Temp.
Resolution pH
Temp.
Accuracy pH
(@20°C/68°F) mV
Temp.
Typical EMC pH
Deviation mV
Temp.
pH Calibration Automatic 1 or 2 points with 5
mV Calibration Automatic two points at 0 and
Temp. Compensation
pH Electrode Amplified, with built-in tem-
ORP Electrode Amplified ORP electrode
Input Impedance 1012 ohm
Power Supply Four 1.5 volt AA alkaline
Casing IP 67
Environment 0 to 50°C/100% RH
Dimensions 7.7 x 3.1 x 2.41 inches
Weight 17.6 oz. (500 g)
0.00 to 14.00 pH
mV
± 2000 mV auto-ranging
0 to 80.0°C
0.01 pH
mV
0.1 mV within ± 400mV
1 mV outside this range
0.1°C from -10 to 120°C
1°C below -10°C
± 0.01 pH
± 0.2mV within ±400mV
± 0.4mV from+400 to +600mV
± 0.4mV from -400 to -600mV
± 2mV outside these ranges
± 0.4°C from 0 to 70°C
± 1°C outside this range
± 0.02 pH
± 1mV within ±600mV
± 2 mV outside this range
± 0.4°C
memorized buffers (4.01, 6.86,
7.01, 9.18, and 10.01 pH)
350 mV, or three points at 0,
350, and 1900 mV
Automatic 0-80°C (32-176°F)
perature sensor
type/300 hours typical life (with
2700 mA/h batteries, without
backlight); 12 VDC adapter
(196 x 80 x 60 mm)
nected) will be displayed on
the LCD for a few seconds.
The meter is now ready to
operate.
To maximize battery life, the meter is automatically switched off after 5 minutes of nonuse (feature is enabled by default and can be
disabled through setup code 20). To reactivate the instrument, press the ON/OFF key.
Before proceeding with pH measurements,
follow the calibration procedure.
NOTE: When using an alternate function
(DEL, FNC, CFM, GLP, RCL and
CALT), press and hold the ALT key
first and then the second listed key.
CAUTION
TO PREVENT DAMAGE TO THE
ELECTRODE, REMOVE THE pH
ELECTRODE FROM THE SAMPLE
BEFORE TURNING THE METER OFF. IF
THE METER IS OFF, DETACH THE
ELECTRODE FROM THE METER
BEFORE IMMERSING THE ELECTRODE
IN THE STORAGE SOLUTION.
SETUP MODE
INITIAL PREPARATION
Each meter is supplied complete with batteries. Remove the back cover, unwrap the
batteries, and install them while paying attention to the polarity. Alternatively, connect the
voltage adapter to the power adapter plug.
To prepare the instrument for use, connect
the pH or ORP electrode to the connector located on the top of the instrument.
To switch the meter on, press the ON/OFF
key. The batteries charge status or "LINE"
message (if external power adapter is con-
Model GLI-98144 Portable pH/ORP Meter 4 Rev. 0-401
Setup can be used to view data regarding instrument status (e.g. battery charge) or to
change the meter parameters (e.g. time).
To enter this mode press
•
the ALT and FNC keys
when the meter is in
measurement mode.
The setup code "00" will
•
blink on the lower LCD
and "Set" will be displayed on the upper one.
Select the code of
•
desired parameter
using Ç or È key.
Press ALT and CFM to
•
confirm the code.
NOTE: If ALT and FNC are pressed before
code confirmation, the meter will
default to measurement mode.
If the selected parameter is password protected, the lower LCD will display "PAS" and
the password must be entered to proceed.
Otherwise, the current parameter value will
be displayed.
PASSWORD PROTECTION
Setting of time, date, and calibration alarm
time-out are password protected, and the
user will be asked to enter the password to
change these parameters. After code confirmation, the upper LCD will display "0000."
If password is set to 0000 (factory set-
•
ting), just press ALT and CFM to confirm.
If password is set to a value different from
•
0000, enter the password with the up and
down arrow keys and then press ALT and
CFM to confirm.
If password is incorrect, the meter dis-
•
plays the "WRONG" indication and asks
for the password again.
If password is correct, the meter provides
•
access to the parameter.
PARAMETER SETTINGS
Once the parameter code
(and password, if needed)
has been entered, the current value of the selected
parameter on the upper LCD and the parameter code on the lower LCD will be
displayed. The parameter or a part of it will
blink (e.g. only the hour blinks if time has
been selected).
Enter the new
•
value using the arrow keys.
If there is another part of the parameter to
be set (e.g. minutes for the time), press
RANGE to gain access and then enter the
new value using the arrow keys.
Press ALT and CFM to confirm the value.
If the entered value is not acceptable, the
•
"WRONG" indication will be displayed for
a few seconds and then the meter will ask
for a correct value.
If the confirmed value is accepted, the
•
meter will pass to the next parameter
(asking for the password if it is protected).
NOTE: If ALT and FNC are pressed before
parameter value confirmation, the
meter will not update the parameter
and, after escaping, will ask for a
new setup code.
The following table lists the setup codes
along with the description of the specific
setup items, their valid values and the factory
settings (default):
Code Valid values Default
00 Instrument ID code 0000-9999 0000
01 Current time
02 Current date
03 Current year
10 Calibration alarm
time-out
20 Auto-Off/Power down
time-out
21 Firmware version
22 Battery level test
99 Password
1
The meter automatically checks for entered time/date accuracy as follows:
0≤hh≤
23; 0≤mm≤59; 01≤dd≤28/29/30/31; 1MM≤12;
1998≤YYYY≤2097.
2
To change the password, the correct code must be entered first. If the password has been forgotten, the
password protected features are no longer accessible. In
this case, contact the GLI International Service Dept.
1
1
1
2
hh:mm 00:00
dd:mm 01:01
YYYY 1998
01-99 days, OFF 07
ON, OFF ON
0000-9999 0000
Rev. 0-401 5 Model GLI-98144 Portable pH/ORP Meter
Loading...