Metrohm 780 - Fig. 3: Rear View of the 780 Ph Meter or 781 Ph;Ion Meter

1.2 Parts and controls
4
780/781 pH/Ion Meter, Manual
Fig. 3: Rear view of the 780 pH Meter or 781 pH/Ion Meter
5
Connection for potentiometric electrodes
pH, ISE, redox or silver electrodes
with built-in or separate reference elec-
trode; socket type F
10
RS232 interface
Connection for printer or PC
6
Connection for separate reference
electrode
4 mm socket type B
11
Barcode reader/
Keyboard connection
7
Serial number
12
12V power connection
8
Connection for temperature sensor
Pt1000 or NTC, for connection with two 2
mm B-plugs; 6.2103.130 and 6.2103.140
Adapters are included for use with 4 mm
banana plugs
13
Grounding connection
For measurements in grounded solu-
tions, grounding of the instrument
may be advantageous to avoid inter-
ferences; 4 mm socket type B
9
MSB connection
(Metrohm Serial Bus) for connecting a
stirrer and/or Dosimat Plus
, directly or via
the optional Remote Box (6.2148.010)