Bacharach GDA-1600, Инструкция по эксплуатации

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Instruction 5700-9001 GDA-1600 16-Channel Controller
19
Entries Description
Measurement
Name
The first two items in this menu are for entering the 6 character engineering unit and
16 character Measurement Name ASCII fields. Eunits should define the units of
measure for what this channel is to display. Measurement Name should describe the
source of this data in the user’s terminology. Section 3.1.1 (see page 11) of this
manual describes how to use the front keypad to modify these fields.
EUnits
Zero
The ZERO and SPAN entries (Input Measurement Range) allow configuration of the
measurement range displayed by this channel. Measurement Range works along
with A/D Counts menus, described in section 3.2.4.1 (page 16), to define the range of
the input signal’s engineering units. For example, if a channel’s input is 4-20mA from
a transmitter monitoring 0 to 10 ppm chlorine, then the Zero value should equal
0.000 and the Span value equal 10.00. The six ASCII engineering units previously
entered are automatically displayed at the top of each menu as a reminder. Four
digits must appear in this entry resulting in trailing 0s that may appear here which are
not displayed on other data screens.
Span
Decimal Points
(Resolution)
Resolution of displayed channel values is configured in this menu by setting the
number of digits trailing the decimal point. Values are limited to a maximum of four
digits and a polarity sign. An auto-ranging feature displays the highest resolution
allowed by this menu’s decimal point entry. For example, if three decimal points are
entered, and the range is 0 to 100ppm, the reading will be 0.000 at 0ppm and 100.0
at 100ppm. However, this may be undesirable due to the high resolution at zero
unless the sensor’s output is extremely stable. If decimal points are limited to one,
the 0ppm reading becomes 0.0 and the 100ppm reading remains 100.0. Resolution
may be limited further by setting Decimal Points to 0. In the above example, this
would cause 0ppm to display 0 and 100ppm to display 100.
Channel On?
(Turning Off
Unused
Channels)
The
Channel On
entry determines if this channel is to be utilized. Turning it off will
cause the controller to never process inputs applied to this channel and no alarms
will be tripped or data displayed. Inactive channels have a line drawn through them
on the Setup screen as indicated by channels 15 & 16 in Figure 3.0 (page 10). If less
than 9 channels are to be activated, the GDA-1600 may be set for 8 channel mode,
deactivating channels 9-16. This is done in the System Setup menu described in
section 3.3 (page 20). The GDA-1600 will only allow 15 channels to be turned off, as
at least one must remain on.
Copy (Data) To This menu simplifies the Setup procedure by allowing similar channels to be copied
from one to another. For example, if all channels are identical except for the
Measurement Name entry, channel 1 could be configured and copied to channels 2 –
16. Only Measurement Name then must be configured on channels 2 – 16. Use EDIT
to increment channel numbers and UP/DN to point to Copy Now? Press EDIT once
more to copy.
Copy Now?
3.2.7 CAL Mode
IMPORTANT!
Each channel’s
CALIBRATION
menu is
inactive
unless its
Input Data
From: menu, described in section 3.2.4 (see page 14), is set for Analog with Local Cal or
Sensor Direct . GDA-1600 CAL MODE features will allow pushbutton calibration of
zero and span values. This feature should be utilized only when there are no other
zero/span controls within the monitoring system since it is inappropriate to calibrate a
signal at more than one point. Therefore, if calibration is to be performed at another
transmitter or monitoring device, the GDA-1600 CAL MODE feature should not be used.