Desktop pH meters HI 122, EL87.1

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Laboratory equipment > Electrochemical measuring instruments > pH meters > Desktop pH meters HI 122, EL87.1

EL87.1

Desktop-pH-meter HI 122

With integral printer.

Sample number, date and time of measurement, pH/°C- or
mV/°C- readings can be printed out at preset intervals.

Features

Simultaneous display of pH or mV- value and temperature
Automatic or manual temperature compensation
from - 20 to +120 °C
Automatic 1- /2- /5- point calibration with 7 pre- programmed standard buffers (pH 1.68; 4.01; 6.86; 7.01; 9.18; 10.01; 12.45)
and 2 freely programmed buffers
RS232- interface

GLP- function
The pH- meter stores the calibrating data (date, time, zero point and gradient) of last calibration.

Calibration- Check- Function

Checks buffer solution and electrode during calibration process
Automatic warning when using a contaminated buffer solution
Gradient and response time of electrode are checked and displayed. If this deviates highly in comparison to the last calibration, the user will be asked to clean the electrode.
Calibration check function only works when electrode HI 1131 P is used.

Technical specifications:

Measuring range	pH mV °C	2.00 to 16.00 / - 2.000 to 16.000 ±2000 (ORP) / ±999.9 (ISE) 20.0 to +120.0
Resolution	pH mV °C	0.01 / 0,001 1 (±2000) / 0.1 (±999.9) 0.1
Accuracy	pH mV °C	±0.01 / ±0.002 ±1 (±2000) / ±0.5 (±999.9) ±0.4
Storage via keystroke		50 readings
Pre- programmable storage intervals (from 55 s to 180 min)		1000 readings
Dimensions (H x L x W)		280 x 203 x 84 mm

Delivery includes: comes complete with pH- glass electrode HI 1131 P, temperature probe, buffer solutions pH 4.01 and pH 7.01 (20 ml each), electrolyte solution, 5 paper rolls and 12- V adapter.

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