Ambient Condition for Calibration
- Ambient temperature: 23°C ± 1°C;
- Relative humidity: 45 to 75% RH;
Preheating: standard instrument should be
preheated to specified time;
Put
this
Instrument
in
calibration
environment for 24 hours, then connect to the
power, and set it in non auto- power-off state, and
preheat for half an hour.
Note
Power supply for calibrator: during the
calibration, it is recommendable to use 2
1.5V
（
LR6
）
batteries.
Operating Output Calibration
Operating calibration in order of items and
calibration points listed in Table 10-2:
Table 10-2
Item
No.
Output Range
Calibration Point
1
DCA/20mA
0
0 FS
FS
1) In power-off state, press the keys
〔
OUTPUT
/ INPUT
〕
and
〔
power
〕
simultaneously to
power on, and release the
〔
OUTPUT /
INPUT
〕
key only after the LCD displays all
the contents. The Instrument enters into the
calibration mode, and the symbols ‘CAL 0’
appear in the LCD;
30
31
