Biogas Operating Manual
Page 6
Geotechnical Instruments (UK) Ltd
BMUK0001 / Issue 1
The most likely reason for the errors is either an incorrect user calibration, or sensor failure. If an
incorrect user calibration has caused the warning it should be correctable by way of returning the
instrument to factory settings, zeroing or carrying out a user calibration as necessary for the relevant
function.
Errors Displayed
All errors displayed will be prefixed by the word ‘ERROR‘ followed by a error code. The errors detected
by the self-test are usually caused by a user calibration being out of specification or possible memory
corruption and will affect the instrument’s function and should therefore be corrected before use, e.g.
01-User cal data, CH
4
reading out of specification, 02-User cal data, CO
2
reading out of specification,
04-User cal data.
Note
If any other types of warning or error are displayed it is advisable to contact
Geotechnical Instruments (UK) Ltd for further information.
Under and Over Range Codes
If a reading is under range (ie below zero) it will be displayed with ‘less than’ chevrons (<<.<). This can
occur if a channel has been incorrectly calibrated or has exceeded it’s specified range. If a reading is
over range (ie above the maximum allowed reading) it will be displayed with ‘more than’ chevrons
(>>.>).
A number displayed as ‘**.*’ indicates an error, usually where the instrument has been unable to
complete a particular calculation. Where there is no data is available dashes (--.-) are displayed. This
usually occurs when a particular reading or parameter has been skipped by the user.
3.5 Cold
Start
Note
This function should only be used as a last resort. For gas calibration error
messages ensure a factory setting and user calibration has been carried out first.
A cold start should only be carried out if no other course of action has proved successful, as this
function will clear the instrument memory entirely, reset all factory settings and reset the internal time
and date to a default setting.
To carry out a cold start, switch the instrument ON and during the self-test press and continue to hold
the
enter key until such time as the self-test has been completed. Upon completion of the self-test
a ‘Pass-code Entry’ screen will be displayed. At this point the
key
may be released. Input the code
‘12345’ and press
to confirm. After the pass-code has been accepted the instrument’s serial
number will be displayed along with the hours of operation and two options:
•
1-Cold Start
•
0-Exit
Only select option
if a cold start is to be carried out. After selection, key
will require pressing
again to confirm this operation. The cold start menu will be displayed again; press key ‘0’ to continue
with normal operation.
3.6 Storage
The instrument should not be exposed to extremes of temperature. Do not keep the instrument in a hot
vehicle. When not in use instruments should be kept in a clean, warm and dry environment, such as an
office. The instrument should be discharged and fully charged at least once every four weeks,
regardless of indicated charge state.
