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Beschikbare talen
FACTORY OVERHAUL
To ensure proper function and accuracy, the Sechrist Air/Oxygen Gas Mixers must be thoroughly overhauled every two (2) years. To maintain
the product warranty, the overhaul must be performed by Sechrist Industries or by Sechrist authorized personnel.
LIFETIME OF DEVICE
The lifetime of Sechrist Air/Oxygen Gas Mixers is twenty (20) years provided they are overhauled using Sechrist supplied components and
Sechrist certified technicians once every two (2) years.
TROUBLESHOOTING
Problem
Inaccurate O
%
2
O
% control knob is difficult
2
to turn.
O
% change > 1% when testing.
2
Continuous alarm with both inlet
pressures equal.
Alarm not sounding with the
loss of pressure from
one source gas.
CAUTION: If the problem or concern continues after taking the appropriate correction, consult an authorized Sechrist service
representative or contact Sechrist Industries Technical Support.
Possible Cause
O
analyzer out of calibration (most common
2
problem).
Improper purity of inlet gases.
Incorrect gas supplied to inlet.
Front and rear seats are worn.
Incorrect calibration of proportioning module.
Malfunctioning balancing module.
Faceplate has shifted.
Bent adjustment shaft.
Air or O
inlet filter may be dirty causing
2
a > 20 psig (138 kPa) difference.
Regulator needle out of calibration.
Dirty inlet filter(s).
Bypass check ball leaking.
Alarm module out of calibration.
Defective alarm reed.
Alarm module out of calibration.
Alarm poppets stuck.
Page 13 • P/N 100001-EU Rev. 31 (10/2024)
Correction
Recalibrate O
Check/verify inlet gas purity.
Assure that outlets and hoses are connected correctly.
Recalibrate gas mixer (shall be performed only by Sechrist Industries or by
Sechrist authorized personnel).
Recalibrate the balancing module (shall be performed only by Sechrist
Industries or by Sechrist authorized personnel).
Reposition faceplate.
Replace shaft and recalibrate (shall be performed only by Sechrist
Industries or by Sechrist authorized personnel).
Replace inlet filter.
Recalibrate gas mixer (shall be performed only by Sechrist Industries or by
Sechrist authorized personnel).
Replace filter(s).
Clean check ball and seat (shall be performed only by Sechrist Industries or
by Sechrist authorized personnel).
Recalibrate (shall be performed only by Sechrist Industries or by Sechrist
authorized personnel).
Replace alarm reed (shall be performed only by Sechrist Industries or by
Sechrist authorized personnel).
Recalibrate gas mixer (shall be performed only by Sechrist Industries or by
Sechrist authorized personnel).
Clean, lubricate poppets and recalibrate as outlined in the service manual
(shall be performed only by Sechrist Industries or by Sechrist
authorized personnel).
analyzer.
2
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