GE FHSD720C Installation And User Manual page 30

FHSD700C Series Product Guide
SETFAN
Applicable to Low Pressure systems. The Default Fan Speed is 5 (Useable Range 3 to 10). Because of
the need to re-normalize the flow readings if the fan speed is changed, please note the following:
 If the display [SETFAN n] flashes, this is the speed currently set
 To Normalise the Flow readings, go to SETFAN press ENTER when the display is flashing (i.e.
the speed is set to current value). Entering a new speed will not automatically initiate a re-
calibration of flow measurements, and the flow readings may not be normalized. This must be
initiated by returning to SETFAN and pressing ENTER. The Flow Normalisation sequence will last
about six minutes, during which time, the display will report progress. This operation must be
done for new installations, or if the sample tube arrangement has been modified, or if the fan
speed is changed. But note that if calibration has been done before at a particular fan speed
setting, those calibration values will be retrieved and used.
STANDBY
Ensure that this is set to the default of 0.
PWRDEL
N/A.
BUZZER
The internal sounder may be enabled or disabled on a permanent basis. The default is 1 (enabled). The
sounder (if enabled) accompanies all ALARM conditions.
BEACON
The integral Beacon may be enabled or disabled on a permanent basis. The default is 1 (enabled). The
beacon (if enabled) accompanies all ALARM conditions.
ADDRESS
This is the detector's RS485 address. The range is 0 to 30; a value of 31 disables RS485
communications. The default setting is 31 (off). Note that if the display panel is used remotely,
communication to it is by means of this RS485 communications port, and the ADDRESS setting is not
used.
Please note that this is not applicable on the standard product.
TESTTIM
Set in minutes. If no rotary valve movement has been triggered within this time period then an automatic
scan will be initiated (for rotary valve systems only). To normalize flow on a FHSD700C-15 detector,
scroll to the TESTTIM parameter in the Configure menu, and press enter. This should only be carried
out after fitting the microbore pipes (equal in length with a maximum of 50 m per channel).
MIN DWELL
Used for rotary valve movement control. Determines the minimum time in seconds that the valve will
remain stationary between sectors (rotary valve systems only). The default setting of '0' must not be
changed if compliance with EN54-20 and UL is required.
GAIN X
N/A.
MOD1, MOD2, MOD3, MOD4, MOD5
Some module types may be used in different ways. MOD1 to MOD5 sets the usage of these modules.
See under the specific I/O module section.
SC_DEL
N/A.
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