manufacturer :       Metrohm

model :                   Titrino 785

annotation :           Dokumente engl.

Front view of instrument:

1     Exchange Unit

2     Display

3     Control keys and indicator lamps on the Titrino

4     Setting of display contrast

5     Controls the dosing rate during manual dosing with <DOS> and subsequent filling

6     Opening for the memory card

Rear view of instrument:

7     RS232 i nterfaces

8     Remote lines (input/output)

9     Connection of electrodes and temperature sensor

10   Connection for separate keypad

11   Connection for power cable

12   Connection for stirrer

13   Rating plate

Technical specifications

Modes                           DET: Dynamic Equivalence Point Titration

MET: Monotonic Equivalence Point Titration SET: Set End point Titration

                                      MEAS: Measurement

                                      CAL: pH calibration

                                      TIP: Links commands to titration procedure

Measuring inputs        2 high-impedance measuring inputs for pH, redox and ISE

                                      electrodes .

1 reference input for a separate reference electrode. May also be used as a differential amplifier.

                                      1 measuring input for polarized electrodes.

                                      1 measuring input for temperature sensor Pt100 or Pt1000.

Measuring range

pH value (pX)                 0...±20.00, resolution 0.01

Voltage                           0...± 2000 mV, resolution 1 mV, error limit 0.1 % fullscale

Current                           0...± 200 µA, resolution 1 µA

Temperature                  –150.0...+450.0 °C, resolution 0.1 °C

Polarizer           Ipol          0...± 127 µA, resolution 1 µA

                        Upol        0...± 1270 mV, in steps of 10 mV
Measuring amplifier (at 25 °C and Titrino warmed-up)

Input resistance             >10 ¹³ Ω

Offset current                 <3 • 10 ^–13 A

Deviation of offset voltage       15 µV/K

Dosification

Volume of buret cylinder         1, (2), 5, 10, 20 or 50 ml

Resolution                      10 000 steps per buret cylinder

Auxiliary burets               2 additional burets: 776 or 765 Dosimat

Materials

Housing                          Polybutyleneterephthalate (PBTP)

Keypad cover                 Polycarbonate (PC)

Display                          Graphical LCD, 192 x 64 Dots

                                      Field: 100 x 37 mm

                                      LED back-lit

Memory card

Standard                        JEIDA ICMC 4.0 / PCMCIA (68 pins)

Data                               Method memory

Storage capacity            128 KB (256 KB maximum)

SRAM card                     Write and read, battery supplied

Flash                              Read only with 55 Metrohm methods

Internal memory           Method memory for up to 100 methods

                                      Silo memory for sample data and results

RS232 interface           2 separate interfaces, each can be configured

for printer, balance or computer connection: completely controllable from external control unit

Remote input/output lines

                                      for Sample Changer, robot connection.

                                      With optional Remote Box:

                                      Connection of barcode reader and PC keyboard.

Stirrer control              Switch the stirrer on/off either manually or coordinated with

                                      the titration sequence

Ambient temperature

Nom. operation range    5 ... 40 QC

Storage                          – 20 ... 60 QC

Transport                       – 40 ... 60 QC

Safety specifications

Designed and tested in accordance to IEC publication 1010, safety class I. This manual contains information and warnings which have to be followed by the user to ensure safe operation and to retain the apparatus in safe condition.

Mains connection

Voltage                           100...240 V

Frequency                      50 ... 60 Hz

Power consumption       15 W

Fuse                               2 x 1 ATH (to be replaced by Metrohm Service only usin the same type)

                                      Additional electronic overload protection

Dimensions with Exchange Unit

Width                              150 mm

Height                             450 mm

Depth                             275 mm

Weight , incl. keypad      app. 3.6 kg