Hach sension ph31, Manual

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1. Technical Specifications
Measuring ranges:
pH -2 .00 to 19 .99
mV ± 2000
Temp -20 to 150 °C (-4 to 302 °F)
Resolution
pH 0 .1/0 .01/0 .001
mV 0 .1/1
Temp 0 .1 °C (0 .1 °F)
Measuring error
(± 1 digit)
pH 0 .002
mV 0 .2
Temp 0 .2 °C ( 0 .4 °F)
Reproducibility
(± 1 digit)
pH ± 0 .001
mV ± 0 .1
Temp ± 0 .1 °C (± 0 .1 °F)
Automatic temperature compensation
Manual entrance .
With Pt 1000 temperature probe (A .T .C .) .
With NTC 10 K probe .
Isopotential pH programmable, standard value 7 .00 .
pH calibration
With 1, 2 or 3 buffers selectable inside the range .
Automatic recognition of technical and DIN 19266 buffers and
up to 3 user’s buffers .
Calibration at any pH value (indirect calibration) .
Theoretical calibration .
Manual introduction of the calibration parameters .
Programmable calibration validity between 0 h and 7 days .
Automatic recalibration warning .
Automatic rejection of electrodes in poor conditions .
pH calibration criteria
Asymmetry potential ± 58 mV .
Slope 41 to 62 mV/pH, at 25°C (77 °F) (sensitivity 70 to 105 %) .
mV calibration
Automatic recognition of redox standard 220 mV at 25°C
(77 °F) .
Calibration at any mV value .
Manual introduction of the calibration parameters .
Temperature readjustment
Correction of the temp . probe deviation (A .T .C .) at 25 °C (77 °F)
and 85 °C (185 °F) .
Measuring mode
By stability (selectable stability criteria) .
Continuous .
By time .
Data Logger
Storage capacity up to 400 readings, by channel .
Storage the last 9 pH calibrations .
Languages
English, German, Spanish, French, Italian, Portuguese .
Display
Graphic, backlit liquid crystal, 128 x 64 dots .
Inputs and outputs
Combined or indicator electrode, BNC connector (Imp . >10
12
) .
Reference electrode, banana connector .
A .T .C . type Pt 1000, banana or telephonic connector .
Stirrer, RCA connector .
RS232C for printer or PC, telephonic connector .
External PC key board, mini DIN connector .
Ambient conditions
Working temperature 5 to 40 °C (41 to 104 °F) .
Storage temperature -15 to 65 °C (5 to 149 °F) .
Relative humidity < 80% (not condensed) .
Power supply
External plug-in power supply 100-240 VAC 0 .4 A 47-63 Hz .
Materials
Enclosure, ABS and PC . Keypad, PET with protective treatment .
Physical parameters
Weight: 1100 g .
Size: 350 x 200 x 110 mm .
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