Honeywell 700 ユーザーズマニュアル

13

66-2069—02

is live. Adjustments will cause the Flame Relay to de-energize 

immediately, ignoring FFRT settings.

To access this setpoint, press and hold the ACCEPT RATIO/

SET GAIN button for 2 seconds until the current value is 

displayed. While the value is displayed, adjustments may be 

made via the INCREASE or DECREASE arrow buttons. To 

store the new setting, press the STORE button until “- -” is 

shown, indicating the value has been accepted.

If no activity occurs for a period of four seconds while the 

value is displayed, the RATIO display will disappear and the 

old ratio setpoint will take effect.

To exit the menu at any time without saving changes, simply 

press the RESET/rE button.

To access the FFRT setpoint, press and hold the FFRT 1/2/3 

SEC OPTION button for 2 seconds until the current value is 

displayed. Refer to Fig. 24 for the setup flowchart. The FFRT 

can be set at 1, 2 or 3 seconds. While the value is displayed, 

adjustments may be made via the INCREASE or DECREASE 

arrow buttons. To store the new setting, press the STORE 

button until “- -” is shown, indicating the value has been 

accepted.

The FFRT changes are not live; they take effect only if the 

STORE button is pressed. FFRT values do not relate to the 

RELAY ON SETPOINT and RATIO (%)/RELAY OFF values. 

Therefore, during automatic setup, if the AUTO SET LED is 

on, confirmation is not needed to change the FFRT setting.

If no activity occurs for a period of four seconds while the 

value is displayed, the FFRT display will disappear and the old 

setpoint will take effect.

To exit the menu at any time without saving changes, simply 

press the RESET/rE button.

An analog output current is provided for operating a remote 

meter or other instrumentation. The load resistance should 

not exceed 360 Ohms for the Model 700 signal processors. 

The resistance can be chosen to give the desired voltage 

swing. For example, if 2V is desired for a 20 mA output, a 100 

Ohm resistor would be used. Fig. 25 contains a flowchart for 

the mA output setup.

The analog current output selections are 0 to 20 milliamps, or 

from 4 to 20 milliamps. Selection of the applicable range is 

made by pressing and holding the 0-20 MA/4-20 MA OPTION 

button until the current value is shown. 02 denotes the 0-

20mA selection while 42 denotes the 4-20mA selection (the 

default value). While the value is displayed, it may be changed 

via the INCREASE or DECREASE arrow buttons. To store the 

new setting, press the STORE button until “- -” is shown, 

indicating the value has been accepted.

Confirmation is not requested if the 0-20/4-20 setting is 

changed when AUTOSET LED is on

The 0/4-20mA output option is live; the operative range 

changes as soon as the displayed selection is changed. 

However, the value must still be saved via the STORE button 

in order to be saved in the signal processor's EEPROM.

To exit the menu at any time without saving changes, simply 

press the RESET/rE button or wait four seconds.

The analog current output is scaled according to the RELAY 

ON setting. It is scaled so that, if the counts coming in are at a 

count rate equal to the RELAY ON setting, the current output 

is approximately 13 MA when the range selected is 0-20 MA, 

and about 14.6 MA when the range selected is 4-20 MA.

Note that the actual maximum level for the current output is 

19.8 MA.

With this feature, the Model 700 signal processors set the 

RELAY ON SET POINT, the RATIO % (Relay Off), and the UV/

IR GAIN automatically. Calculations for these settings are 

carried out in the signal processor as the operator takes the 

system through BURNER ON and BURNER OFF sequences. 

Fig. 19, 20 and 21 flowchart the automatic setup sequence.

The FFRT (flame failure response time) and the 0/4-20mA 

output option must be manually setup after the automatic 

setup process is complete. Refer to the Manual Setup of 

Setpoints section and Fig. 24 and 25. for details on setting 

these 2 parameters.

Before starting the automatic setup sequence, adjust the 

RELAY ON SET POINT to get the FLAME ON relay to 

energize.

Press BNR-ON SEQ START/END key for two seconds. If the 

FLAME ON relay is de-energized, the display will show “bo” 

(burner off); press RESET to clear this. If the FLAME ON relay 

is energized, the ON SEQ LED will start flashing slowly and 

the numeric display will start counting down from 59 while the 

processor takes data at one reading per second. The FLAME 

ON relay will remain energized if the flame is present, 

according to the current settings, until valid new values are 

obtained. To end the data sampling, press the same button, 

BNR-ON SEQ START/END, again, but ensure that an 

adequate number of data samples has been taken. At least 30 

seconds of BNR-ON data sampling is recommended; ten 

seconds is a minimum. The software will not respond to a 

second press of the button for 10 seconds. RESET may also 

be pressed while the data sampling is occurring; the data 

sampling process will be aborted and the old values will 

remain in effect.

After BNR-ON data sampling is complete, the OFF SEQ LED 

flashes. Turn off the burner and immediately press the BNR-

OFF SEQ START/END key (a two-second press is not 

required). The displayed timer then counts down from 29. This 

process may be interrupted, but at least 15 seconds of BNR-

OFF data sampling is recommended. The data sampling 

process can be aborted by pressing RESET, in which case the 

data for both BNR-ON and BNR-OFF will be discarded and the 

previous values will remain in effect.

If  the data is good, that is, the computed ratio is 71% or less 

when BNR-OFF data sampling is complete, the display shows 

the ratio in percentage for one second, followed by “- -”  to indicate 

a successful setup.  The signal processor then turns  on  the 

AUTO SET LED to verify that the values stored internally were 

derived from the BNR-ON/BNR- OFF data sampling sequence.

If the data received is marginal, with the computed ratio ranging 

from 72% to 80%, the display alternates be- tween “AC” and