Máy đo độ PH 765 phòng thí nghiệm - Knick Việt Nam

Laboratory pH Meter 765

Equipment:  Meter with power cord, without electrode

Ranges pH: –2.00 ... +16.00 / mV: –1999 ... +1999 / ºC: –50.0 ... +150.0

Display: Alphanumeric 2 x 4 digits, 14-segment LED, 13 mm high characters, measurement

symbols pH/mV/ºC/man, 3 Sensoface status indicators inform on the condition of

electrode and equipment (GLP)§}

Measuring cycle Approx. 1/sec

Accuracy:  pH: <0.01 / mV: <0.1 % ±0.3 mV / ºC: <0.3 K

Input : DIN 19262

Input resistance:  >1 x 10!‡ Ohm

Input current (20 ºC)‡} : <1 x 10–!‡ A

Temperature coefficient:  <0.1 count/K

Electrode standardization:  Calimatic automatic calibration and buffer recognition (German patent 29 37 227)

For buffer sets, see Page 65, permitted calibration ranges:

Zero: pH 6 ... 8 Slope: 47 ... 61 mV/pH (25 ºC)

(Option 346) : Nominal zero/slope/Viso*}

Zero: pH 0 to 14 Slope: 25 ... 61 mV/pH Viso: –500 ... +500 mV

Electrode monitoring:  Sensoface evaluates zero, slope, response time, and glass impedance

of the electrode, as well as the calibration interval,

electrode condition displayed as good / average / poor, can be disabled

Cal timer monitors the calibration interval

Fullcheck device self-test : Tests complete measurement electronics incl. analog output, segment and

keypad test in diagnostics mode, automatic short-check at power-on

Records:  Records of parameter setting, calibration, and diagnostics, records for QM documentation

to ISO 9000 and GLP§}, retrievable in diagnostics mode or via interface (printer)

Displaymatic:  Digit suppression according to signal change, can be disabled

Temperature : compensation Pt 100 / Pt 1000, automatic selection / manual: –50.0 ... +150.0 ºC*}

Dead stop current : –10 µA

Recorder output*}:  Galvanically isolated mV: 1 mV/mV / pH: 100 mV/pH / ºC: 10 mV/ºC

Interface:  RS 232 without control lines, galvanically isolated, can be used either as printer or

computer interface, Baud rate: 600 / 1200 / 2400 / 4800 / 9600*}

Data formats: 7 Bit, even/odd parity*}

8 Bit, no parity*}

Protocol: none, xon/xoff*}

Stop bits: 1