Defects occurring within 3 years from delivery date shall be remedied free of charge
at our plant (carriage and insurance paid by sender).
Sensors and accessories: 1 year
Subject to change
Return of products under warranty
Please contact our Service Team before returning a defective device.
Ship the cleaned device to the address you have been given.
If the device has been in contact with process uids, it must be decontaminated/
disinfected before shipment. In that case, please attach a corresponding certicate,
for the health and safety of our service personnel.
Disposal
Please observe the applicable local or national regulations concerning
the disposal of “waste electrical and electronic equipment”.
3
Registered trademarks
The following names are registered trademarks. For practical reasons they are shown
without trademark symbol in this manual.
Index .................................................................................................. 43
5
6
Check the shipment for transport damage and completeness.
The package of the Portavo 904(X) PH includes:
• The Portavo 904(X) PH incl. 4 AA batteries and premounted quiver
• Carrying strap
• Quickstart instructions in various languages
• Specic test report
• Safety instructions
• Certicates
• Data carrier with detailed user manuals and Paraly SW 112 software
• USB cable, 1.5 m
Package Contents
Documentation
Specic Test Report
CD-ROM
Complete documentation:
• User manuals in dierent languages
• Safety Information
• Certicates
• Quickstart guides
Safety Instructions
In ocial EU languages and others.
• EC Declarations of Conformity
7
Certicates
• IECEx
• ATEX
Quickstart Guides
Installation and rst steps:
• Operation
• Menu structure
• Calibration
• Error messages and recommended actions
Various languages on CD-ROM and on our website:
www.knick.de
8
Overview of the Portavo 904(X) PH
The Portavo 904(X) PH is a portable
pH meter. A plain-text line on the highcontrast LCD screen makes operation virtually self-explanatory. The device variant
904 XPH is available for applications in
hazardous locations up to Zone0.
The meter stands out by the following
features:
• Use of digital Memosens sensors
• Memosens sensors and DIN pH sensors
can be used on one device.
• A detachable quiver protects the sensor
and prevents it from drying out. Further-
Quiver
more, it can be used for calibration.
• The rugged housing is made of a high-performance polymer. It provides high
impact resistance and dimensional stability even when exposed to extreme
moisture.
• Scratch-proof clear glass display, perfectly readable even after years
• Very long operating times with one set of batteries (4 x AA) or use of a Li-ion
battery for reliable operation even at high or very low operating temperatures
(Li-ion battery not suited for Portavo 904 X PH for application in a hazardous
location)
• Data logger with 5000 values
• Micro USB port for communication with Paraly SW 112 software for data
evaluation of digital sensors (Memosens)
• Sensoface icons provide single-glance information on the sensor condition
(page 34)
• Calibration with “Calimatic” automatic buer recognition (page 18)
• Manual calibration by entering individual buer values
• Real-time clock and indication of battery charging level
• At measuring temperatures from -20 to +100 °C the temperature detector can be
automatically identied.
Overview of the Portavo 904(X) PH
Value-Added Features
Memosens
The Portavo 904 can communicate with
Memosens sensors. When these digital sensors are
connected to the meter, they are automatically
identied and indicated by the logo shown on the
right. Furthermore, Memosens allows the storage
of calibration data, which will be available and
can still be used when the sensor is connected to
another Memosens-capable device.
Sensoface
Sensoface provides quick information on the sensor condition. The three “smiley” faces as shown
on the right represent the sensor condition during
measurement and after a calibration. When the
condition deteriorates, an “INFO …” message
gives a hint to the cause.
9
Automatic calibration with Calimatic
Calimatic is a very convenient method for pH
calibration with automatic buer recognition.
You only have to select the buer set with the
buers used. The buers can then be used in any
order.
As delivered, this calibration method is preset. It
can be adjusted or disabled in the conguration
menu.
10
Overview of the Portavo 904(X) PH
Protective Cover
The front of the meter is protected by a
cover, which can be completely ipped
over and secured to the back for operation. A label on the inner side of the
cover explains the control functions and
device messages.
Hook
A fold-out hook on the back allows
suspending the meter. This leaves your
hands free for the actual measurement.
The rating plate is located beneath the
hook.
Protective Cover and Hook
Combined
Cover and hook can be joined together
to form a benchtop stand allowing comfortable and fatigue-free working at a lab
bench or desk.
Overview of the Portavo 904(X) PH
Display
The meter has a three-line display for
representing alphanumeric information such as measurement and calibration data, temperatures and date/time.
Additional information is provided by
means of icons (Sensoface, battery
icon, etc.).
Some typical displays are shown here.
Measuring
(display of measured value,
temperature, date and time)
11
Calibration – step 1
Logger data
(display of measured value, memory
location, temperature, date and time)
End of calibration
(display of slope)
Clock
(display of hours and minutes,
seconds and date).
12
Overview of the Portavo 904(X) PH
Keypad
The keys of the membrane keypad have a
noticeable pressure point.
They have the following functions:
on/oSwitches the meter on and
displays the device and
calibration data
(see Start-Up)
measSwitches the meter on /
Activates measuring mode /
Stops the data logger
calStarts calibration
setActivates conguration /
Conrms entries
clockDisplays time and date, allows
setting the clock using set
RCLView stored values
STOHolds and saves a measured
value, allows setting and
starting the logger by
pressing set (page 23)
▲
▼
When this icon is displayed,
you can use the arrow keys
for navigation.
Start-Up
Check the shipment for transport damage and completeness (see Package
Contents).
Caution!
Do not operate the device when one of the following conditions
applies:
• the device shows visible damage
• the device fails to perform the intended function
• prolonged storage at temperatures above 70 °C
• severe transport stresses
In this case, a professional routine test must be performed.
This test should be carried out by the manufacturer.
Precautions for application in hazardous locations
Warning!
• Only open the battery compartment of the Portavo 90n X outside the
hazardous location.
• Never try to open the device. If a repair should be required, return the
device to our factory.
• Never use the USB port within the hazardous location.
13
Inserting the Batteries
With four AA batteries, the Portavo has an
operating time of over 1000h.
Open the battery compartment on the
rear of the device. Be sure to observe the
correct polarity when inserting the batteries (see markings in the battery chamber).
Close the battery compartment cover and
screw it handtight.
A special lithium-ion battery suited to the battery compartment is available for the
Portavo 904. The battery is recharged through the USB port.
Note: Not available for the Portavo 904 X (device variant for applications in hazardous locations).
14
A battery icon in the display indicates the battery power level:
Icon fully lledBatteries at full capacity
Icon partially lledBattery capacity is sucient
Icon emptyBattery capacity not sucient;
calibration is possible, no logging
Icon blinksMax. 10 operating hours remaining,
measurement is still possible
Caution! It is absolutely necessary to replace
the batteries.
Warning!
When using the Portavo 904 X (device variant for applications in
hazardous locations) in a hazardous location, only the battery types
listed below may be used. The batteries must be from the same manufacturer and of identical type and capacity. Never use new and used
batteries together (see also Control Drawing 209.009-110).
Start-Up
Batteries
for Application in Hazardous Locations
Batteries (4x each)Temp. classAmbient temperature range
Duracell MN1500T4-10 °C ≤ Ta ≤ +40 °C
Energizer E91T3-10 °C ≤ Ta ≤ +50 °C
Power One 4106T3-10 °C ≤ Ta ≤ +50 °C
Panasonic Pro Power LR6T3-10 °C ≤ Ta ≤ +50 °C
Start-Up
15
Connecting a Sensor
The Portavo 904(X) PH provides several connections so that many types of sensors
can be used for measurement. Note that only one sensor may be connected to the
meter at a time.
The meter automatically recognizes a connected Memosens sensor and switches
accordingly. Memosens is signaled in the display.
Caution!
Always make sure that a sensor is connected to the meter before
starting measurement.
Explanation: The analog pH input of the Portavo is an electrometer
amplier with an extremely high-impedance. When the sensor is not
in contact with the medium or not connected to the meter, electric
charges on the input can generate arbitrary, stable pH or mV values
which will be shown in the display.
Connections
a - Micro USB port
b - M8, 4 pins for Memosens sensors
c - Temperature probe GND
d - Temperature probe
e - pH socket (DIN 19 262)
Memosens sensors have a cable coupling, which allows convenient replacement
of sensors while the cable remains connected to the meter. The connecting cable is
connected to socket b (M8, 4 pins for Memosens sensors).
16
Switching On the Meter
When you have connected the sensor, you can switch the meter on
by pressing the on/o or meas key.
When the meter is switched on with the on/o key, rst a self test is
performed and then the calibration data and settings are displayed
before the meter switches to measuring mode.
When the meter is switched on with the meas key, it immediately
switches to measuring mode.
Depending on the connected sensor and the specic measuring
task, several steps for conguration and calibration must be performed as described on the following pages.
Icons
Important information about the state of the device:
Start-Up
Sensor
condition
Process
variable
Error message
active
Memosens sensor
Date Logger
Battery
charging level
Temperature
detection
(sensor,
separate or
manual)
Time
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