8
Sentry Equipment Corp
Troubleshooting
symptom
possible problem(s)
remedy
Elevated sample
temperature
(For cooler option)
Loss of cooling water flow
Increase in cooling water inlet
temperature
Scaled cooler
Increased sample flow
Check cooling water supply
Reduce cooling water temperature or
increase flow
Chemically clean (see cooler maintenance)
Adjust sample flow rate
Reduced sample flow
Plugged line
Blow down line and exercise flow control
valve
Inspect and/or replace needle assembly
Leaking valve stems
Loose or worn packing
Tighten packing nut or replace packing
Leaking cooler
(For cooler option)
Loose housing from thermal shock
or worn gasket
Tighten bolts on head assembly or replace
gasket if cut or worn
Parts & Accessories
The following parts are recommended spares for the Sentry Cobra M sampler. Please consult the accompanying job-
specific drawings for exact part numbers and descriptions.
Flow-through sample valve
Isolation valve
Check valve
