Rae FMC-60, Руководство по эксплуатации

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10] Addressable Zero and Span
The first part of this menu allows you to zero an addressable CAN channel.
The channel is selected by using UP and DOWN buttons and the reading itself is adjusted by
pr and -.
This menu will timeout and the number of seconds left is displayed on the LCD.
SELECT will exit the zero menu and present the span menu.
The channel is selected by using UP and DOWN buttons and the reading itself which is based on
the peak readings is adjusted by pr and -.
This menu will timeout and the number of seconds left is displayed on the LCD.
Because peak readings are used, a number of sensors can be spanned at the same time.
11] Set LCD backlight and Led Dimmer
The value of brightness for the LCD/led when dimmed is set using UP and DOWN buttons and
SELECT will exit the menu. The actual brightness is displayed on the LCD as a percentage and
on the front panel leds themselves whilst adjusting. This level of brightness will be used in normal
mode when the DIM button is pressed.
12] Is an Exit Point
13] Is top of Engineers Menu
14] Inhibit a Sensor
During maintenance, individual sensors can be inhibited so that false alarms are not indicated.
A front panel led illuminates to indicate that at least one sensor has been inhibited in the system.
The first part of this menu allows a direct sensor to be inhibited using the + and – to toggle the
state. The LCD indicates whether inhibited or not and the UP and DOWN buttons change the
channel. Note that only channels with active sensors can be inhibited.
Pressing
SELECT or timeout will move to the second part of this menu which allows addressable
CAN sensors to be inhibited in the same way.
Pressing
SELECT will exit this menu.
15] Addressable Alarm Levels
The alarm levels for can sensors can be changed in this menu
Three levels are presented, LOW, HIGH and OVER RANGE
Use + and – to change the LOW level and the UP and DOWN buttons which alter the channel
being changed
Pressing SELECT moves to HIGH alarm
Pressing SELECT moves to OVERANGE
Pressing SELECT exits this menu.
16] Adjust 4-20 mA Outputs
The FMC-60 has two 4-20 outputs which can be assigned to follow individual sensors.
The zero point (ie 4mA) and full span point (ie 20mA) have to be electronically set within FMC-60
and this menu allows this adjustment.
The first part of this menu allows channel 1 output 4ma to be set by measuring this current as
millivolts across a 1 ohm resistor between TP1 and TP2 on the pcb.
The 4-20 output terminals can be shorted or wired to a load for this.
Use + and – buttons to adjust the reading to 4 millivolts.
Pressing UP moves to channel 1 20mA output which again can be adjusted.
Pressing UP again moves to channel 2 4mA which can be adjusted.
And finally pressing UP again moves the adjustment to channel 2 20mA.
Pressing SELECT at any time will exit this menu.
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