If the unit enters an alarm condition, the motor, pump, and heater will all
the stopped automatically. Also, if the “SONALERT” is turned on, an audi-
ble alarm will sound.
The three controllers on the unit can cause an alarm: pressure, tempera-
ture and 15 VDC. Check the display on each of the three controllers. The
one that caused the alarm will display “1FSH” or “Sbr”.
Always address an alarm condition immediately. Failure to do so
could result is damage to the equipment or even operator injury.
If an alarm condition appears to be in error, follow these steps to diagnose
the problem:
1. Compare the reading on the three controllers to the three readings
on the chart recorder. If any of the three controllers shows a signifi-
cantly different reading than the chart recorder, there may be a
problem with the devices or the wiring. Make sure all devices are
working and are properly connected to each other.
2. Check the following, based on which controller is causing the alarm:
-
Temperature: Make sure the thermocouple is plugged securely
into the jack on the unit cabinet.
-
Pressure: Open the panel on the side and locate the shunt. The
shunt has three positions: out, middle, and in. If it is either out
or in (not middle), the controller will report the maximum pres-
sure, causing an alarm. Make sure the shunt is in the middle
position.
Also, check the cable connection to the transducer inside the
cabinet. Make sure it is screwed firmly into the transducer.
-
15 VDC: Make sure the potentiometer is installed correctly
inside the test cell. The orientation of the electrical contacts
must match the nodes on the inside of the cell.
3. Check the alarm setting on the controller. If the alarm is set too low
(for example: if the temperature alarm is set to 32°F), the unit will
always be in an alarm condition. Refer to the documentation for
each controller for further instructions.
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ofite.com
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