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Section 1 Specifications
Specifications are subject to change without prior warning.
pH / mV measuring channel
Measuring Range
pH -2 to16 pH
mV ± 2000 mV
Temperature –20 to 150 ºC
Resolution
pH 0.01
mV 1
Temperature 0.1 ºC (0.18 ºF)
Measuring error
(± 1 digit)
pH ≤ 0.05
mV ≤ 3
Temperature ≤ 0.5 ºC (≤ 0.9 ºF)
Temperature
compensation
pH With Pt 1000 probe or manual introduction
mV Compensation is not carried out
Calibration
pH
1, 2 or 3 buffers to choose among pH 2.00, 4.01, 7.00, 9.21 and 10.90
at 25 ºC (77 ºF)
Acceptance criteria: asymmetry ± 58 mV, sensibility 70 to 105%
Indirect calibration at any pH value
Manual introduction of electrode calibration data
mV
In one point, 220 mV at 25 ºC (77 ºF)
Acceptance criteria: ± 60 mV respect to the theoretical value of the
standard at the calibration temperature
Indirect calibration or manual readjustment at any mV value
Manual introduction of electrode calibration data
Temperature readjustment Correction of the probe deviation
Relays 2 for limit. Switch N/O. Maximum load: AC < 250 V / < 3 A / < 750 VA.
Analogical outputs
Two 4 to 20 mA outputs. One for pH or mV and the other for
temperature. R. maximum 500 Ohm
Channel for E. C. measurement (electrical conductivity)
Measuring interval
(resolution according
to measured range)
Conductivity 0.01* µS/cm to 1000** mS/cm (* with C = 0.1 cm
-1
** with C ≥ 9 cm
-1
)
Salinity 5.85 mg/L to 278 g/L NaCl
T.D.S. 0 mg/L to 200 g/L
Resistivity 5 Ohm×cm to 100 MOhm×cm
Temperature –20 to 150 ºC (–4 to 302 ºF)
Measuring error
(± 1 digit)
Conductivity ≤ 1% of measured value
Salinity ≤ 1% of measured value
T.D.S. ≤ 1% of measured value
Resistivity ≤ 1% of measured value
Temperature ≤ 0.4 ºC (≤ 0.72 º)
Temperature compensation Using Pt 1000 integrated probe in the cell or data entrance by keypad
Reference temperature, TR 20 or 25 ºC
Temperature coefficient, TC 0.00 to 5.00% / ºC
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