5750H002 Ed.03
21
12.- Reset to zero
OPTION A: CLEAN AIR
(Not valid for AKO-575744)
Ÿ
Before beginning the reset to zero procedure, ensure that the area of the premises is
free of freon gas
and
any other substances that could affect the transmitter, and that the transmitter
has been operating for at
least 20 minutes
.
Ÿ
Enter the programming menu by pressing the
SET
key for 10 seconds and access parameter
{00
(See page
14). The unit will request a confirmation code (
Co
d). Use keys
Q
and
N
to enter code 63 and press
SET.
Ÿ
Use keys
Q
and
N
to select option 1 and press
SET
. This will start the process.
Ÿ
During the process, the display will alternate between showing the gas concentration and the
CAL
message
and the illuminated
symbol. This process will last for between 30 seconds and 5 minutes. On completion,
if the reset to zero process has been successful, the display will show “
End
” and emit a long beep.
OPTION B: WITH NITROGEN GAS
Materials required:
AKO-58110
calibration kit
Nitrogen gas cylinder
Ÿ
After initiating the reset to zero process, ensure that the transmitter
has been operating for at least 20
minutes.
Ÿ
Install the
AKO-58110
calibration kit following the instructions on page 18.
Ÿ
Enter the programming menu by pressing the
SET
key for 10 seconds and access parameter
{00
(See page
14). The unit will request a confirmation code (
Cod
). Use keys
Q
and
N
to enter code 63 and press
SET.
Ÿ
Use keys
Q
and
N
to select option 1 and press
SET
. This will start the process.
Ÿ
Open the shut-off valve of the gas cylinder and wait.
Ÿ
During the process, the display will alternate between showing the gas concentration and the
CAL
message
and the
symbol illuminated. This process will last for between 30 seconds and 5 minutes. On completion,
if the reset to zero process has been successful, the display will show “
End
” and emit a long beep.
Ÿ
Close the shut-off valve of the nitrogen gas cylinder, disconnect the cylinder and remove the calibration kit
from the transmitter.
If any problems have been detected during the reset to zero process, the transmitter will emit three short
beeps and display one of the following error codes:
CODE
ERROR
EC
A reading of greater than 300 PPM has been detected during the process.
Et
The temperature of the sensor has experienced a variation of greater than 5 °C.
Eto
The maximum time period (5 min) has been exceeded and the reading has not stabilised.
Summary of Contents for AKO-575 Series
Page 1: ...AKO 575xxx Gas transmitter User manual GB 5750H002 Ed 03...
Page 26: ...5750H002 Ed 03 26...
Page 27: ...5750H002 Ed 03 27...
