Elma 795
UK 35
v. 290817
06-09-2016 10:40:26
5. PH/mV MEASURING and CALIBRATION PROCEDURE
If the meter is first time to connect the pH electrode, it should make the calibration before
operation, the calibration procedures refer to chapter 5-4
5-1 pH measurement (manual Temp. compensation)
1. Use the "
Function”
Button, step to
pH
function See pkt. 4
2. Connect the pH electrode (optional) (5-1, Fig.2) into the pH (BNC
socket) (3-16, Fig.1)
3. Prepare the solutions to be measured.
4. Adjust the temperature value, same value as the solution temperature
see pkt. 10-8
.
5. Hold the electrode handle (5-2, Fig. 2) by hand and let the sensing
head (5-3, Fig. 2) immersed wholly into the measured solution and
little shake the electrode.
6. The main display will show the pH value, the bottom display will show
the setting manual Temp. value.
5-2 PH Measurement (ATC, automatic Temperature)
1. Same as
5-1
pH measurement
just prepare one temperature probe (optional, TP-07), insert the TP-
07's plug into the "Temp. Socket " (3-13, Fig. 1), immerse the sensing head of temperature probe
(TP-07) into the measurement solution.
2. The main display will show the pH value, the bottom display will show the setting manual Temp. value.
NB! When not use the Electrode, it should immerse the "Electrode sensing head" (5-3, Fig. 2) into the "
Protection bottle " (5-4, Fig. 2)
5-3 mV Measurement
The instrument build in mV millivolt) measurement function, which enable you to make ion-selective,
ORP (oxidation-reduction potential), and other precise mV measurements.
1. Use the "
Function”
Button, step to mV (
ORP
) function. The Display will show "
mV
"
2. Connect the ORP electrode (optional, ORP-14) into the pH Socket (BNC Socket) (3-16, Fig.1)
3. The Display will show "
mV
", value.
5-4 pH Calibration
Calibration Consideration
The most ideal pH ELECTRODE generates 0 mV at pH 7.00 (177.4 mV at PH 4) The meter has
been calibrated with signals which simulate the most ideal pH ELECTRODE (based on 25
℃
ambient environment). However not every pH ELECTRODE is as accurate as the most ideal one, so
calibration procedures are necessary to be done before the first time measurement. In addition to the
first time measurement, users are recommended to execute the calibration procedures to ensure the
high accuracy measurement.
Required Equipment for Calibration
1)
pH ELECTRODE (optional PH-03).
2)
pH buffer solutions (optional PH-07).
The meter default function are following :
*
The display unit is set to pH.
*
The temperature unit is set to
℃
.
*
Manual ATC (without connect the ATC probe)
*
Auto power off.
