- -
11
The calibration information is saved in the instrument's memory. The same correction is applied to
any probe that is subsequently connected to the input: therefore the "USER calibration" should only
be used with the probe used for calibration and not with other probes.
To pass from the user to the factory calibration and back, proceed as follows (see also the menu
description in chapter 3):
•
press simultaneously
(A-B)/MENU
and
DATA/ENTER
to open the menu:
•
press ENTER until the menu item
"CAL_MODE"
is selected;
•
use the
and
arrows (respectively located above the HOLD and REL keys) to select the
type of calibration, FACT or USER;
•
confirm by pressing
DATA/ENTER
.
4.2.1 Calibration sequence
Instrument on line with the probe(s)
The calibration can be carried out on one or two points
that should differ by at least 10°C
and be
included in the probe functioning range.
1.
Insert the probe into a thermostatic bath, the temperature of which is precisely known from a
reading taken on a sample reference thermometer. Wait for the measurement to stabilize.
2.
Press simultaneously
(A-B)/MENU
and
DATA/ENTER
to open the menu.
3.
Press
DATA/ENTER
until the menu item
"CAL_MODE"
is selected.
4.
Use the
and
arrows (respectively located above the HOLD and REL keys) to select the
USER calibration.
5.
Confirm with
DATA/ENTER
.
6.
Use the
and
arrows (respectively located above the HOLD and REL keys) to select the
input to which the probe being calibrated is connected, choosing the upper connector A or the
lower one B.
7.
Confirm with
DATA/ENTER
.
8.
The
"SEL_MEAS_1/2"
message is displayed in the comment line.
9.
Use the
and
arrows to select
"1"
(first calibration point).
10.
Confirm with
DATA/ENTER
.
11.
The
"UP DOWN 1st MEAS"
message is displayed in the comment line: the instrument display
shows the measured temperature.
12.
Use the
and
arrows to correct the indicated value until it coincides with the value
measured by the sample reference thermometer.
13.
Confirm with
DATA/ENTER
.
14.
To exit the procedure without performing the second point, select
"0"
and press
ENTER
.
15.
To calibrate the second point, select the point
"2"
using the
and
arrows.
16.
Press
DATA/ENTER
.
17.
The
"UP DOWN 2nd MEAS"
message is displayed in the comment line.
18.
Move the probe to the second thermostatic bath and wait for the measurement to stabilize.
19.
The instrument display shows the measured temperature.
20.
Use the
and
arrows to correct the indicated value until it coincides with the value
measured by the sample reference thermometer.
21.
Confirm with
DATA/ENTER
.
The procedure is now complete.
Содержание HD2328
Страница 2: ... 2 Thermocouple Thermometer HD2328 ...
