Model : 6251 pH, ORP, Ion, Temperature Portable Meter
Description
pH/ mV/ ION/ Temp. microprocessor handheld meter in splash proof case, BNC pH/ mV/ ION connector and 8-pin DIN ATC connector. AC/ DC power. CE Approved.
• CE approved
• Power down backup
• Splash resistant/ watertight case
• Battery/ ac adaptor
• High 50/ 60hz noise rejection
• High resolution , 4 1/ 2 digit readout
• Highly reliable mechanical touch keys with audio feedback
• Programmable resolution to 0.001/ 0.1 pH, 1/ 0.1 mv
• Direct readout in ion concentration ( calibration units conform to that of the calibration standard solutions)

Specifications
pH Range : -2.00 to 16.00 pH
pH Resolution : 0.01 pH or0.001pH( selectable)
ORP Accuracy : ± 0.1% ± 1 digit

ORP Range : -1999 to 1999 mV
Resolution : 1 mV or 0.1mV( selectable)
ORP Accuracy : ± 0.1% ± 1 digit

Ion Range : 0.00 to 119.8 conc., over 3 ranges
Ion Resolution : 0.05 to 0.2 conc., over 3 ranges
Ion Accuracy : ± 2 LSD

Ion Range : 0.00 to 25.00
Ion Resolution : 0.05 conc.
Ion Accuracy : ± 2 LSD

Ion Range : 25.0 to 50.0
Ion Resolution : 0.1 conc.
Ion Accuracy : ± 2 LSD

Ion Range : 50.0 to 119.8
Ion Resolution : 0.2 conc.
Ion Accuracy : ± 2 LSD

Temp. Range : -5.0 to 125.0 ° C
Temp. Resolution : 0.1° C
Temp. Accuracy : ± 0.5 ° C

General
• pH buffer recognition model: 6251 - pH 7.00, 4.01, 10.01
6251c - pH 6.86, 4,
• pH standardization: Dual point standardization
• Ion standardization: Single or dual point standardization
• pH temp. compensation: Auto/ manual -5.0 to 125.0° C
• pH buffer temp. range: 0 to 50.0° C
• pH electrode offset recognition: ± 90 mV at pH 7.00 or 6.86
• pH electrode slope recognition: ± 30% at pH 4.00, 9.18 or10.01
• Input impedance: Greater than 10exp( 12) ohms
• ATC probe: Thermister, 10 kilo ohms at 25° C
• Audio feedback: All touch keys
• Display pH/ me/ temp: 15mm/ 7.5mm high LCD
• Ambient temp. range: 0 to 50.0° C
• Power supply: battery/ adaptor: 6AAA batteries/ ac adaptor
• Power backup: Memeory backup
• Battery life ( alkaline) : 25 hours or so
• Dimensions: 83mm x 241mm x71mm
• Weight: 450gms ( batteries included)