Section 1
Introduction
1.1 Instrument Description
The Model 3505 is a general purpose, laboratory pH/mV meter that uses rotary controls for mode
selection, pH calibration and manual temperature adjustment. Automatic Temperature
Compensation can be achieved by use of the ATC probe, which will enable the user to perform
temperature measurements within the range of 0 to 100°C.
The Model 3505 has a liquid crystal display and is battery operated. The use of an optional power
supply permits the unit to be operated from the a.c. mains supply.
1.2 Instrument Specifications
Range
Resolution
-2.00 to 16.00pH
0.01pH
-1999 to +1999mV
1mV
Accuracy:
pH:
±0.02pH
Millivolts:
±1mV
Temperature:
±0.5°C
Input Impedance:
>10
12
ohms
Temperature
Compensation:
Manual:
-10 to 105°C
0.1°C
Automatic: 0 to 100°C
0.1°C
Calibration:
Manual
Display:
25mm LCD
Power:
9V Battery (MN1604, PP3 or equivalent)
Outputs:
Analogue buffered electrode potential
Size:
250(L) x 210(W) x 55(D)mm
Weight:
850g
350 550/REV A/03-03
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