Metrohm 854 User Manual

CH-9101 Herisau info@metrohm.com www.metrohm.com

854 iConnect

Introduction

The 854 iConnect is the measuring input for electrodes with an integrated memory chip (iTrodes). The analog-digital converter in the 854 iConnect transforms the analog measuring signal of the electrode into digital pulses directly at the sensor. As a result of the digital data transfer, the measuring signal is no longer prone to electrostatic influences. A transmission free from interferences can be guaranteed no matter how long the electrode cable is.

Connecting the iConnect

The 854 iConnect can be connected to the following devices:

￭ Titrandos with an iConnect connector

￭ 867 pH Module

Connecting to a Titrando

Either one or two 854 iConnect can be connected to a Titrando depending on the Titrando's model version.

￭ Plug the iConnect plug of the 854 iConnect

into the socket "iConnect" of the Titrando. Make sure that the marking on the plug matches the marking on the Titrando as shown in figure 1.

Fig. 1: Connecting the 854 iConnect

￭ The 854 iConnect is detected automatically

and entered as measuring input into the device properties of the Titrando. If an electrode is connected to the 854 iConnect that is not yet listed in the sensor list of the control software, a corresponding message is displayed.

The 854 iConnect can be plugged in and disconnected without problems while the instrument is switched on.

Connecting an electrode

￭ Remove the protective cap and connect the

electrode as shown in figure 2. The guide pin guarantees correct connection in such a way that the contact pins cannot be damaged.

￭ Tighten the screw coupling with two fingers.

Fig. 2: Connecting an electrode

Note

Screw on the protective cap when the 854 iConnect is not in use as a protection against chemicals and mechanical impact.

Technical specifications

Measuring interface

Potentiometry:

Input resistance

Offset current < 1 · 10

Polarizer:

Polarization current

Ipol

Polarization voltage

Upol

–125.0 / +125.0 µA: non-guaranteed values,

dependent on reference voltage +2.5 V

–1250 / +1250 mV: non-guaranteed values,

dependent on reference voltage +2.5 V

Measuring ranges

pH values:

Range –13…+20 pH

Resolution 0.001 pH

Measuring accuracy 1)±0.003 pH

Voltage:

Range –1200 mV…

Resolution 0.1 mV

Measuring accuracy 1)±0.2 mV

Current:

Range –120 µA…+120 µA

Resolution 0.01 µA

> 1 · 1012 Ω

-12

A under

reference conditions

–122.5…+122.5 µA in steps of 2.5 µA

–1225…+1225 mV in steps of 25 mV

+1200 mV

Temperature:

Range Pt1000 NTC

–150 °C…+250 °C –5 °C…+250 °C

Resolution Pt1000 NTC

0.1 °C

Measuring accuracy 1)

Pt1000 ±0.2 °C (–20 °C…

+150 °C)

NTC ±0.6 °C (+10 °C…

+40 °C)

± 1 digit, without sensor error, under reference

conditions

potentiometric and voltametric

amperometric

for an NTC sensor with R (25 °C) = 30'000 Ω

and B (25/50) = 4100 K.

Power supply

Power supply via data cable, e.g.

from Titrando

Operating voltage 5 V

Power consumption approx. 10 mA dur-

ing measurement

Safety specifications

Design and testing According to

EN/IEC/UL 61010-1, CSA-C22.2 No. 61010-1 Protection class III

Electromagnetic compatibility

Emission Standards fulfilled:

EN/IEC 61326-1 EN/IEC 61000-6-3 EN 55022 / CISPR 22

8.854.8001EN 1/2

Immunity Standards fulfilled:

EN/IEC 61326-1 EN/IEC 61000-6-2 EN/IEC 61000-4-2 EN/IEC 61000-4-3

Ambient temperature

Nominal function range

Storage –20 °C…+60 °C

Transport –40 °C…+60 °C

Reference conditions

Ambient temperature +25°C (±3°C)

Relative humidity ≤ 60%

Operating temperature status

Validity of the data After adjustment

+5 °C…+45 °C (at a maximum of 85 % humidity)

Instrument in operation at least 30 min

obtained from your local authorities, from waste disposal companies or from your local dealer.

Scope of delivery

2.854.0010 iConnect

854 iConnect 1.854.0010

Manual 854 iConnect, DE, EN

Optional accessories

iAquatrode Plus with Pt1000

iUnitrode with Pt1000

iSolvotrode 6.0279.300

iAg Titrode 6.0470.300

iPt Titrode 6.0471.300

8.854.8001DE,

8.854.8001EN

6.0277.300

6.0278.300

ranty provisions apply. Warranty claims cannot be pursued if the Customer has not complied with the obligations to make payment on time.

During the warranty period Metrohm undertakes, at its own choice, to either repair at its own premises, free of charge, any instruments that can be shown to be faulty or to replace them. Transport costs are to the Customer's account.

Faults arising from circumstances that are not the responsibility of Metrohm, such as improper storage or improper use, etc. are expressly excluded from the warranty.

Further documents

Documentation in additional languages can be found on http://products.metrohm.com under

Literature/Technical documentation.

Dimensions

Material of housing Polypropylene (PP)

with 5 % steel fibers

Diameter 23 mm

Length of housing 71 mm

Length of cable 1500 mm

Weight (without electrode)

Recycling and disposal

This product is covered by European Directive 2002/96/EC, WEEE – Waste from Electrical and Electronic Equipment. The correct disposal of your old equipment will help to prevent negative effects on the environment and public health. More details about the disposal of your old equipment can be

8.854.8001EN 2/2

51 g

iEcotrode plus 6.0280.300

iAg ring electrode, comb.

iPt ring electrode, comb.

6.0450.300

6.0451.300

Warranty (guarantee)

Metrohm guarantees that the deliveries and services it provides are free from material, design or manufacturing errors. The warranty period is 36 months from the day of delivery; for day and night operation it is 18 months. The warranty remains valid on condition that the service is provided by an authorized Metrohm service organization.

Glass breakage is excluded from the warranty for electrodes and other glassware. The warranty for the accuracy corresponds to the technical specifications given in this manual. For components from third parties that make up a considerable part of our instrument, the manufacturer's war-