Crison MultiMeter 44 Manual Del Usuario página 5

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