Xylem YSI pH/ISE 1320P User manual

OPERATIONS MANUAL
ba76161e01 08/2015
TruLab pH/ISE 1320(P)
PH/ISE METER
pH/ISE 1320P
pH/ISE 1320
pH/ISE1320P
pH/ISE1320

2ba76161e01 08/2015
TruLab pH/ISE 1320
For the most recent version of the manual, please visit www.ysi.com.
Contact YSI
1725 Brannum Lane
Yellow Springs, OH 45387 USA
Tel: [phone]
800-765-4974
Email: environme[email protected]
Internet: www.ysi.com
Copyright ©2015 Xylem Inc.

TruLab pH/ISE 1320 - Contents
TruLab pH/ISE 1320 Contents
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1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 TruLab pH/ISE 1320 meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 TruLab pH/ISE 1320P meter. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.1 Safety information in the operating manual . . . . . . . . . . . . 9
2.1.2 Safety signs on the meter . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.3 Further documents providing safety information . . . . . . . . 9
2.2 Safe operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.1 Authorized use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.2 Requirements for safe operation . . . . . . . . . . . . . . . . . . . 10
2.2.3 Unauthorized use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Initial commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.1 Inserting the batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3.2 Connecting the power pack . . . . . . . . . . . . . . . . . . . . . . . 13
3.3.3 Mounting the stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 Printer (only TruLab pH/ISE 1320 P) . . . . . . . . . . . . . . . . . . 14
4.1 Commissioning / switching the printer on or off . . . . . . . . . . . . 14
4.2 Operation / printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3 Printer settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4.1 Changing the roll of paper (thermal paper) . . . . . . . . . . . 15
4.5 What to do if... / printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 General operating principles . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1.1 Keypad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1.3 Status information (meter) . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1.4 Socket field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2 Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3 Switching off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.2 Measured value display . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.4.3 Menus and dialogs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Contents TruLab pH/ISE 1320
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5.4.4 Elements in menus and dialogs . . . . . . . . . . . . . . . . . . . 21
5.4.5 Example 1 on navigation: Setting the language . . . . . . . 23
5.4.6 Example 2 on navigation: Setting the date and time . . . 25
5.5 Channel display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.5.1 Display of several sensors in the measuring mode 27
6 pH value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1.1 Measuring the pH value . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1.2 Measuring the temperature . . . . . . . . . . . . . . . . . . . . . . 30
6.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.2.2 When do you have to calibrate? . . . . . . . . . . . . . . . . . . . 31
6.2.3 Automatic calibration (AutoCal) . . . . . . . . . . . . . . . . . . . 31
6.2.4 Manual calibration (ConCal) . . . . . . . . . . . . . . . . . . . . . . 34
6.2.5 Calibration points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.2.6 Calibration data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.2.7 Continuous measurement control (CMC function) . . 40
7 ORP voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.1.1 Measuring the ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.1.2 Measuring the relative ORP . . . . . . . . . . . . . . . . . . . . . . 43
7.1.3 Measuring the temperature . . . . . . . . . . . . . . . . . . . . . . 44
7.2 ORP calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
8 Ion concentration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8.1.1 Measuring the ion concentration . . . . . . . . . . . . . . . . . . 45
8.1.2 Measuring the temperature . . . . . . . . . . . . . . . . . . . . . . 47
8.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.2.3 Calibration (ISE Cal). . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.2.4 Calibration standards . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
8.2.5 Calibration data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
8.3 Selecting the measuring method . . . . . . . . . . . . . . . . . . . . . . . 54
8.3.1 Standard addition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
8.3.2 Standard subtraction . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.3.3 Sample addition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
8.3.4 Sample subtraction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.3.5 Standard addition with blank value correction (Blank value
addition) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
9 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
9.1 Measurement settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
9.1.1 Settings for pH measurements . . . . . . . . . . . . . . . . . . . . 67
9.1.2 Buffer sets for calibration . . . . . . . . . . . . . . . . . . . . . . . . 69
9.1.3 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
9.1.4 Settings for ORP measurements . . . . . . . . . . . . . . . . . . 73
9.2 Settings for ISE measurements . . . . . . . . . . . . . . . . . . . . . . . . 74

TruLab pH/ISE 1320 Contents
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9.3 Sensor-independent settings . . . . . . . . . . . . . . . . . . . . . . . . . . 76
9.3.1 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
9.3.2 Data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
9.4 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
9.4.1 Resetting the measurement settings . . . . . . . . . . . . . . . 77
9.4.2 Resetting the system settings. . . . . . . . . . . . . . . . . . . . . 78
10 Data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
10.1 Manual data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
10.2 Automatic data storage at intervals . . . . . . . . . . . . . . . . . . 80
10.3 Measurement data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
10.3.1 Editing the measurement data storage. . . . . . . . . . . . . . 82
10.3.2 Erasing the measurement data storage . . . . . . . . . . . . . 84
10.3.3 Measurement dataset. . . . . . . . . . . . . . . . . . . . . . . . . . . 84
10.3.4 Storage locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
11 Transmitting data (USB interface). . . . . . . . . . . . . . . . . . . . . 85
11.1 Options for data transmission . . . . . . . . . . . . . . . . . . . . . . . . . 85
11.2 Connecting a PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
11.3 MultiLab Importer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
12 Maintenance, cleaning, disposal. . . . . . . . . . . . . . . . . . . . . . 87
12.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
12.1.1 General maintenance activities . . . . . . . . . . . . . . . . . . . 87
12.1.2 Replacing the batteries. . . . . . . . . . . . . . . . . . . . . . . . . . 87
12.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
12.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
12.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
13 What to do if.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
13.1 pH/ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
13.2 ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
13.3 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
14 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
14.1 Measuring ranges, resolution, accuracy . . . . . . . . . . . . . . . . . 94
14.1.1 pH/ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
14.1.2 ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
14.2 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
15 Firmware update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
16 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
17 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
18 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
18.1 Ordering & Technical Support . . . . . . . . . . . . . . . . . . . . . . . . 103
18.2 Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Contents TruLab pH/ISE 1320
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TruLab pH/ISE 1320 Overview
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1 Overview
1.1 TruLab pH/ISE 1320 meter
The compact precision pH meter TruLab pH/ISE 1320 enables you to carry out
pH measurements, ORP measurements and ion selective measurements
quickly and reliably.
The TruLab pH/ISE 1320 provides the maximum degree of operating comfort,
reliability and measuring certainty for all applications.
The USB interface can be used for data transmission to a PC and for software
updates of the meter.
1 Keypad
2 Display
3 Socket field
3
1
2
pH 1320

Overview TruLab pH/ISE 1320
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1.2 TruLab pH/ISE 1320P meter
The integrated printer of the TruLab pH/ISE 1320 P enables to document mea-
surements according to GLP requirements.
1.3 Sensors
A measuring system ready to measure consists of the TruLab pH/ISE 1320
meter and a suitable sensor.
Suitable sensors are pH electrodes, ORP electrodes and ion selective elec-
trodes (ISE).
The information concerning the printer of the TruLab pH/ISE 1320
P is given in a separate chapter (see section 4 PRINTER (ONLY
TRULAB PH/ISE 1320 P), page 14).
1 Keypad
2 Display
3 Socket field
4Printer
5 Control panel of the printer
1
2
3
4
5
pH 1320P

TruLab pH/ISE 1320 Safety
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2 Safety
2.1 Safety information
2.1.1 Safety information in the operating manual
This operating manual provides important information on the safe operation of
the meter. Read this operating manual thoroughly and make yourself familiar
with the meter before putting it into operation or working with it. The operating
manual must be kept in the vicinity of the meter so you can always find the infor-
mation you need.
Important safety instructions are highlighted in this operating manual. They are
indicated by the warning symbol (triangle) in the left column. The signal word
(e.g. "Caution") indicates the level of danger:
NOTE
indicates a possibly dangerous situation where goods might be damaged
if the actions mentioned are not taken.
2.1.2 Safety signs on the meter
Note all labels, information signs and safety symbols on the meter and in the
battery compartment. A warning symbol (triangle) without text refers to safety
information in this operating manual.
2.1.3 Further documents providing safety information
The following documents provide additional information, which you should
observe for your safety when working with the measuring system:
• Operating manuals of sensors and other accessories
• Safety datasheets of calibration or maintenance accessories (such as buffer
solutions, electrolyte solutions, etc.)
WARNING
indicates a possibly dangerous situation that can lead to seri-
ous (irreversible) injury or death if the safety instruction is not
followed.
CAUTION
indicates a possibly dangerous situation that can lead to
slight (reversible) injury if the safety instruction is not fol-
lowed.

Safety TruLab pH/ISE 1320
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2.2 Safe operation
2.2.1 Authorized use
This meter is authorized exclusively for pH, ORP and ISE concentrations
measurements in the laboratory.
Only the operation and running of the meter according to the instructions and
technical specifications given in this operating manual is authorized (see
section 14 TECHNICAL DATA, page 94).
Any other use is considered unauthorized.
2.2.2 Requirements for safe operation
Note the following points for safe operation:
• The meter may only be operated according to the authorized use specified
above.
• The meter may only be supplied with power by the energy sources
mentioned in this operating manual.
• The meter may only be operated under the environmental conditions
mentioned in this operating manual.
• The meter may only be opened if this is explicitly described in this operating
manual (example: Inserting the batteries).
2.2.3 Unauthorized use
The meter must not be put into operation if:
• it is visibly damaged (e.g. after being transported)
• it was stored under adverse conditions for a lengthy period of time (storing
conditions, see section 14 TECHNICAL DATA, page 94).

TruLab pH/ISE 1320 Commissioning
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3 Commissioning
3.1 Scope of delivery
pH meter TruLab pH/ISE 1320
4 batteries 1.5 V Mignon type AA
Power pack
USB cable (A plug on mini B plug)
Stand
Stand holder
Comprehensive operating manual
Short instructions
CD-ROM with
– USB drivers
– detailed operating manual
– Software MultiLab Importer
3.2 Power supply
The TruLab pH/ISE 1320 is supplied with power in the following ways:
Mains operation with the supplied power pack
Battery operation (4 x alkaline manganese batteries, type AA)
USB operation via a connected USB-B cable
3.3 Initial commissioning
Perform the following activities:
Insert the supplied batteries
For mains operation: Connect the power pack
If necessary, mount a stand
Switch on the meter
(see section 5.2 SWITCHING ON THE METER, page 19)
Set the date and time
(see section 5.4.6 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND TIME,
page 25)

Commissioning TruLab pH/ISE 1320
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3.3.1 Inserting the batteries
You can operate the meter either with normal batteries or with
rechargeable batteries (Ni-MH). In order to charge the batteries, an
external charging device is required.
1 Battery compartment
1. Open the battery compartment (1) on the underside of the meter.
CAUTION
Make sure that the poles of the batteries are positioned cor-
rectly.
The ± signs on the batteries must correspond to the ± signs in
the battery compartment.
2. Place four batteries (type Mignon AA) in the battery compartment.
3. Close the battery compartment (1).
4. Set the date and time
(see section 5.4.6 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND
TIME, page 25).
1

TruLab pH/ISE 1320 Commissioning
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3.3.2 Connecting the power pack
3.3.3 Mounting the stand
The stand base can be mounted at the right side of the meter.
CAUTION
The line voltage at the operating site must lie within the input
voltage range of the original power pack (see section 14 TECH-
NICAL DATA, page 94).
CAUTION
Use original power packs only (see section 14 TECHNICAL DATA,
page 94).
1. Connect the plug of the power pack to the socket for the power pack on
the TruLab pH/ISE 1320.
2. Connect the original power pack to an easily accessible power outlet.
1
2

Printer (only TruLab pH/ISE 1320 P) TruLab pH/ISE 1320
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4 Printer (only TruLab pH/ISE 1320 P)
4.1 Commissioning / switching the printer on or off
Switching on the
printer
Switching off the
printer
1 Operating LED
– Is illuminated: Printer is switched on
– Flashes: Printer is switched off
2 Control panel with the keys <FEED> and <ON/OFF>
3 Lever to open the paper compartment
4 Lid of the paper compartment
2
1
3
4
1. Connect the power pack to the TruLab pH/ISE 1320 P.
The LED lights up green. The printer is ready for operation.
or
When the printer had been switched off (LED flashing):
Switch on the printer with <ON/OFF>.
The LED lights up green. The printer is ready for operation.
If there is a USB-B connection at the same time (e.g. to a PC), the
data are output to the PC only.
1. Switch off the printer with <ON/OFF>.
The LED flashes. The printer is switched off.

TruLab pH/ISE 1320 Printer (only TruLab pH/ISE 1320 P)
ba76161e01 08/2015 15
4.2 Operation / printing
Data are only output to the printer if the following requirements are met
Data are transmitted manually or automatically (see section 11.1 OPTIONS
FOR DATA TRANSMISSION, page 85)
The printer is switched on (LED illuminated)
There is no USB connection.
4.3 Printer settings
To open the Storage & config menu, press the <ENTER_> key in the measured
value display. After completing the settings, switch to the measured value dis-
play with <M>.
Default settings are printed in bold.
4.4 Maintenance
4.4.1 Changing the roll of paper (thermal paper)
Menu item Possible set-
ting
Description
System / Printer /
Font size
12x20
8x16
7x16
Select the font size for the printer
A print sample (font of the printer) to
view the available font sizes can be
output with <ON/OFF_>.
System /
Printer /
Print test page
-The printer prints the meter informa-
tion from the menu, System / Ser-
vice information.
The current printer settings are
used for the printout.
1. Pull the lever (3) until the lid (4) of the paper compartment opens.
2. If necessary, remove any remains of the old roll of paper.
3. Insert the new roll of paper. The start of the paper should poke out of the
paper compartment.
4. Close the lid (4) of the paper compartment so that it clicks into place.
5. If necessary, move the printer paper forward with <FEED>.

Printer (only TruLab pH/ISE 1320 P) TruLab pH/ISE 1320
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4.5 What to do if... / printer
Integrated printer
does not print
Printer operating -
paper not being
printed
Integrated printer
prints automatically
Cause Remedy
– Printer switched off
(LED flashing)
– Switch on the printer
(LED illuminated)
– No power pack connected – Connect the power pack
– USB cable connected – Disconnect the USB cable from the
meter
– Function "store automatically at
intervals" with long intervals is
switched on
– Switch off the function (see section
10.2 AUTOMATIC DATA STORAGE AT
INTERVALS, page 80)
– No paper available – Insert a roll of paper
Cause Remedy
– Paper inserted the wrong way up – Turn the roll of paper around and
insert it with the other side upwards
Cause Remedy
– The function "store automatically
at intervals" or "transmit data
automatically at intervals" is
switched on
– Switch off the functions (see sec-
tion 10.2 AUTOMATIC DATA STORAGE
AT INTERVALS, page 80 or
section 11.1 OPTIONS FOR DATA
TRANSMISSION, page 85)

TruLab pH/ISE 1320 Operation
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5Operation
5.1 General operating principles
5.1.1 Keypad
In this operating manual, keys are indicated by brackets <..> .
The key symbol (e.g. <ENTER>) generally indicates a short keystroke (under
2sec) in this operating manual. A long keystroke (approx. 2 sec) is indicated
by the underscore behind the key symbol (e.g. <ENTER__>).
<F1>:
<F1__>:
<F2>:
<F2__>:
Softkeys providing situation dependent functions, e.g.:
<F2>/[USB output]:
Outputs data to the USB interface
<F2__>/[USB output]:
Configures the automatic data output to the USB inter-
face
<On/Off>:Switches the meter on or off
<M>:Selects the measured parameter / Quits the settings
<CAL>:
<CAL__>:
Calls up the calibration procedure
Displays the calibration data
<STO>:
<STO__>:
Saves a measured value manually
Opens the menu for the automatic save function
<RCL>:
<RCL__>:
Displays the manually stored measured values
Displays the automatically stored measured values
<><>:
<__><__>:
Menu control, navigation
Increments, decrements values
Increments, decrements values continuously
<ENTER>:
<ENTER__>:
Opens the menu for measurement settings / confirms
entries
Opens the menu for system settings
<AR> Freezes the measured value (HOLD function)
Switches the AutoRead measurement on or off
F1
F2
STOSTO
RCL
ARAR

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5.1.2 Display
5.1.3 Status information (meter)
1 Status information (sensor)
2 Measured value (with unit)
3 Measured parameter
4 Continuous measurement control (CMC function)
5 Channel display: Plug position of the sensor
6 Sensor symbol (calibration evaluation, calibration interval)
7 Measured temperature (with unit)
8 Status information (meter)
9 Softkeys and date + time
AR Stability control (AutoRead) is active
HOLD Measured value is frozen (<AR> key)
Batteries are almost empty
HOLD AR
25.0
6.093
pH
°C
4
3
2
6
7
8
9
1
AutoCal
5
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YSI

TruLab pH/ISE 1320 Operation
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5.1.4 Socket field
5.2 Switching on the meter
1 pH electrode or ion selective electrode 1
2 Reference electrode 1
3 Temperature sensor 1
4 pH electrode or ion selective electrode 2
5 Reference electrode 2
6 Temperature sensor 2
7 Mini USB-B interface
8 Power pack
9 Service interface
CAUTION
Only connect sensors to the meter that cannot return any volt-
ages or currents that are not allowed (> SELV and > current
circuit with current limiting).
Almost all customary sensors fulfill these conditions.
1. Switch the meter on with <On/Off>.
The meter performs a self-test.
The display shows the manufacturer's logo while the self-test is being
performed.
The measured value display appears.
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5.3 Switching off
Automatic switch-off The instrument has an automatic switch-off function in order to save the
batteries (see section 9.3.1 SYSTEM, page 76). The automatic switchoff
switches off the measuring instrument if no key is pressed for an adjustable
period.
The automatic switchoff is not active
if the communication cable is connected
if the Automatic data storage function is active, or with automatic data trans-
mission
if the power pack is connected
Display illumination The meter automatically switches off the display illumination if no key is
pressed for 30 seconds. The illumination is switched on with the next keystroke
again.
You can also generally switch the display illumination on or off (see section
9.3.1 SYSTEM, page 76).
5.4 Navigation
The principles of navigation in menus and dialogs are explained in the following
sections.
5.4.1 Operating modes
The meter has the following operating modes:
1. Switch the meter off with <On/Off>.
pH
6.949
25.0 °C
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12:12 USB output