Instruction manual

Instruction manual αlpha DO 2000
13
5 CALIBRATION MODE
You can access the Calibration mode directly from the Measurement mode by pressing the
CAL key and entering the Calibration security code “11”. Calibration mode may also be
accessed via the Setup mode (see section 6.1).
5.1 Entering Calibration mode
MEAS
SETUP
HOLD
%
4
°C
CAL
ENTER
ENT
SETUP
HOLD
1-point or 2-point Calibration
See section 5.2
ENT
ENT
ENT
OFS
11
13.0
22
CAL
Pressure Compensation Setting
DO
1. While in Measurement mode press the CAL key (direct access) or ENT key (access via Setup
mode).
2. If CAL key was pressed: The display prompts you to enter the calibration security code. Press
the ▲ or ▼ key to set the calibration security code to “11”, and then press the ENT key to
confirm the calibration security code.
3. If ENT key was pressed: The display prompts you to enter the security code. Press the ▲ or
▼ key to set the security code to “22”. Press the ENT key to confirm the security code, and
then press the ▲ or ▼ key to select the calibration sub-function.
The display shows “CAL DO”. To start calibration, refer to section 5.2.
Note: to exit Calibration mode at any time press the ▲ and ▼ keys simultaneously
(escape). The transmitter returns to the Measurement mode and the old calibration
values remain active. The calibration security code automatically resets from “11” to
“000” after the transmitter returns to Measurement mode.
Note: The calibration is always carried out in the units (mg/l or ppm or %) selected in
setup mode. The DO controller/transmitter allows a 1-point or 2-point calibration.