General Tools and Instruments WK2017SD - Manual (Page 17)

SPECIFICATIONS
Embedded microcontroller Custom one-chip LSI device
Display type Liquid-crystal with green backlight
Display size 2.05 x 1.5 in. (52 x 38mm)
Parameters measured pH, ORP, conductivity, TDS, DO content, salt content
Measurement range 0 to 14 for pH; -1999 mV to +1999 mV for ORP; conductivity
up to 200 mS (milliSiemens); TDS up to 132,000 ppm;
DO up to 20 mg/L; salt content up to 12% by weight.
Measurement accuracy ± (0.02 pH units + 2 digits) for pH; ± (0.5% of reading
+ 2 digits) for ORP; ± 2% of full-scale reading + 1 digit for
conductivity and TDS; ± 0.8ºC/± 1.5ºF for temperature;
± 0.4 mg/L for DO in solution and 0.1% for oxygen in air;
±0.5% of value for salt
Measurement resolution 0.01 unit for pH; 1 mV for ORP; for conductivity:
0.1 uS @ 200 uS full-scale (f.s.), 0.001 mS @ 2 mS f.s.,
0.01 mS @ 20 mS f.s., 0.1mS @ 200 mS f.s.;
for TDS: 0.1 ppm @200 ppm f.s., 1 ppm @2,000 ppm f.s.,
10 ppm @ 20,000 ppm f.s., 100 ppm @ 100,000 ppm f.s.;
0.1ºF/0.1ºC for temperature; 0.1 mg/L for DO in solution and
0.1% for oxygen in air; 0.01% of reading for salt
Temperature compensation Automatic between 32º and 150ºF (0º and 65ºC) when using
optional ATC temperature probe; manually settable between
32º and 212ºF (0º and 100ºC) without ATC probe
Storable/recallable readings Maximum, minimum
Datalogging sampling time Settable between 1 second and 8 hours, 59 minutes,
59 seconds (in automatic datalogging mode)
SD card capacity 1 GB to 16 GB
Settable parameters Date, time, auto power off, beep sound, sampling time,
decimal point or comma decimal division, temperature unit,
compensation temperature. Also salt and altitude
compensation (DO mode only)
Operating temperature 32º to 122ºF (0° to 50ºC)
Operating relative humidity 0 to 85%
Power source 6 Alkaline “AA” batteries or optional 9-VDC AC adapter
Power consumption 14 mADC (normal operation, with backlight off and SD card
not saving data); 37 mADC with backlight on and card saving
data; 49 mADC with backlight on and card saving data
Dimensions of meter 6.97 x 2.68 x 1.77 in. (177 x 68 x 45mm)
Weight of meter 1.08 lb. (489g)
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