Hanna Instruments GROLINE HI981421, Инструкция по эксплуатации

Страница: 32 / 48

32
6. OPERATIONAL GUIDE
6.1. PROBE CALIBRATION
The probe should be calibrated:
• before being installed in the system.
• after probe replacement.
• daily, if greater accuracy is required.
• every 2 weeks as part of routine maintenance (
HI1285‑8 only).
Every time you calibrate the Monitor use fresh buffer standards and perform electrode maintenance
as required. It is advised to choose calibration buffers that bracket the sample pH.
Two calibration modes are available for pH and EC:
• Quick calibration: easily accessible from Menu, allows simultaneous single‑point calibrations
for pH and EC using quick calibration solution.
• Standard calibration: accessible from pH or EC Menu; allows pH calibration with one or two
buffers (from 3 eligible pH values: 4.01; 7.01; 10.01) and a single EC calibration point (with
standards 1.41 mS/cm or 5.00 mS/cm).
Preparation
Pour small quantities of buffer solutions into clean beakers. If possible, use plastic beakers to
minimize any EMC interferences. For accurate calibration and to minimize cross‑contamination, use
two beakers for each buffer solution: one for rinsing the probe and one for calibration.
6.1.1 QUICK CALIBRATION
For quick calibration use HI5036 quick calibration solution ( HI50036 sachet or HI5036‑050
500 mL bottle).
Submerge the probe a minimum of 4 cm (1½”) into the solution and stir gently.
Select Quick Calibration from MENU.
Press Start and Monitor enters in Quick calibration screen.
When the standard value is recognized and stability is reached
the Monitor automatically accepts the calibration.
OPERA
TIONAL GUIDE