TSI Instruments SUREFLOW 8635-M, Руководство по эксплуатации и обслуживанию

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Technical Section 35
Symptom Possible Cause Corrective Action
Pressure sensor
red LED is
blinking (Figure
8).
Problem with
sensor (slow
uniform blink).
Communication
(fast burst of
non-uniform
blinking).
Red LED is
constantly on.
Check SENSOR STAT and confirm NORMAL is
displayed. If ERROR is displayed, correct error.
Unit is communicating with DIM. This is normal.
This is normal when no problems exist or when no
communication is occurring.
DIM always
displays 0.200
inches H
2
O.
Incorrect pressure
sensor output. Pressure sensor must be set for 0 to 10 volt output, not
4
to 20 mA (do not confuse this output with DIM analog
output). Check pressure sensor dip switch 3 and make
sure it is OFF (see Figure 8).
DIM does not
respond to RS-
485
communications.
Network protocol is
incorrect.
Incorrect network
address.
Incompatible
software.
Go into INTERFACE menu, NET PROTOCOL item.
The protocol must match host system. Select correct
interface.
The network address at the building automation system
and at the DIM must match. The network address must
be unique for each DIM.
Data sent to DIM may be in form that the SureFlow
monitor cannot recognize.
DIM displays
opposite
pressure signal. Sensor direction is
incorrect. Pressure sensor must have dip switch correctly set for
proper sign display. Verify dip switch 4 is ON when
sensor is mounted in the laboratory (controlled space),
and OFF when sensor is mounted in corridor (reference
space). See Figure 8.
Alarm relays
don't work. Alarms are turned
off.
Incorrect wiring.
Relay may be
defective. Press TEST key. The individual alarm set points will
display. If all alarm set points are zero, alarm relay is not
active, so relay will not be required to change state.
Check the wiring from SureFlow monitor relay's output
to the device that is connected to the relays.
Disconnect the wiring from relay contact pins 13 and 14
for low alarm relay and pins 25 and 26 for high alarm
relay. Go into DIAGNOSTICS menu, LOW ALM REL or
HIGH ALM REL. Connect an ohmmeter to relay
terminals to verify contact open and closes. Press
the

/

key to manually trip the relay. If relay responds
(contact opens and closes), the device connected is
incompatible or defective.
If relay doesn’t respond, relay
is defective (may be caused by incompatible device).
Replace DIM.