PRESYS
Instruments
T-650PH
Page 20
7 - Calibration
Warning: Enter the following options only after understanding them completely.
Otherwise, it may be necessary to return the instrument to the factory
for recalibration! In this manual Calibration means Adjustment!
Select
CAL
option from the main menu and press the
ENTER
key. You should
then enter the password (
PASSWORD
) 9875 to access the calibration menu.
The password functions as a protection to calibration ranges. After the password
is entered, the menu displays the options:
IN
OUT
DATE
You should then choose the input range (
IN
) as the output range (
OUT
) is not
available for the user.
DATE
is an option which allows you to record the date on which
the calibration was performed and once it has been filled in, it will be displayed every
time the calibrator is turned on.
Options for
IN
calibration are:
mV
mA
OHM
CJC
PROBE
7.1 - Input Calibration
Select the corresponding mnemonic and apply the signals presented in the tables
below.
When calibrating inputs, the display shows on the 2
nd
line the value measured by
the calibrator and on the 1
st
line the same value is expressed as a percentage.
Note that the applied signals just need to be close to the values shown in the
table.
Once the signal has been applied, store the values of the 1
st
and 2
nd
calibration
points, by pressing keys 1 (1
st
point) and 2 (2
nd
point).
mV Input
1
st
point
2
nd
point
G4
0.000 mV
70.000 mV
G3
0.000 mV
120.000 mV
G2
0.000 mV
600.000 mV
G1
600.000 mV
2400.000 mV
mA Input
1
st
point
2
nd
point
Single range
0.0000 mA
20.0000 mA
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