7 Maintenance
7-1. Maintenance intervals and items
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SD-1DGH
7
Maintenance
The detector is an important instrument for the purpose of safety.
To maintain the performance of the detector and improve the reliability of safety, perform a regular
maintenance.
7-1. Maintenance intervals and items
•
Daily maintenance:
Perform a maintenance before beginning to work.
•
Monthly maintenance: Perform maintenance on the alarm circuit (alarm test) once a month.
•
Regular maintenance: Perform maintenance once or more for every six months to maintain the
performance as a safety unit.
Maintenance
item
Maintenance content
Daily
maintenance
Monthly
maintenance
Regular
maintenance
Power Supply
Check
Check that the power lamp lights up.
{
{
{
Concentration
Display Check
Check that the concentration display
value is zero. When the reading is
incorrect, perform the zero adjustment
and span adjustment after ensuring that
no other gases exist around it.
{
{
{
Flow rate
check
Check the flow rate to find
abnormalities.
{
{
{
Filter check
Check the dust filter for dust or clogging.
{
{
{
Alarm Test
Inspect the alarm circuit by using the
alarm test function.
−
{
{
Span
Adjustment
Perform the span adjustment by using
the calibration gas.
−
−
{
Gas Alarm
Check
Check the gas alarm by using the
calibration gas.
−
−
{
