Monarch Instrument DC 2000 - Manual (Page 49)

Chapter 3 Getting Started
Page 3-19
To stop the recording return to the same menu and select “Record Off”. From the pop-up window showing
“record off?” press YES then ENTER. Wait for the disk light to go out and the status to show REC OFF
before removing the disk.
3.11 Hot-Swap
Hot-Swap is the ability to “Swap” disks without turning off the record mode so there is no
data loss. WARNING - DO NOT REMOVE THE DISK WHILE THE GREEN LIGHT IS
ON. When the disk is pulled out, a window will appear (see Figure 3-16) displaying the
time left before data is lost. For the fastest record rate 4 times per second, you will have
approximately 5 minutes (see chart below). Each pen has its own buffer so the approxi-
mate times listed are for any number of pens.
The time in the window will count down in two second intervals for sample rates
faster than 2 samples per second. The window will count down in intervals equiva-
lent to the sample rate for rates faster than 2 samples per second.
If the disk is not replaced within the time frame displayed, data will be lost.
If there are different record rates, the buffer time displayed will be for the fastest
record rate.
3.12 Changing File Names
The user can name files to help identify the process being measured. The system uses a single filename for all
types of files, pens, alarm, and configuration. The filename can be any DOS compatible name. To change the
filename, select Record Setup from the PROGRAM menu and press Enter. Use the UP (
↑) or DOWN (↓) Arrow
keys to highlight “Filename” and press ENTER. The current filename will be displayed. Use the alphanumeric
keypad to enter up to eight characters. Do not enter any file extension or “.”. Press the ENTER button when done.
Filenames can be changed as often as needed and multiple file sets can be recorded onto the same disk. Multiple
configuration files may also reside on a single disk.
3.13 Setting the Disk Full Alarm
It is possible to set a threshold to indicate when the disk is full. The indication is via a pop-up window on the screen,
or if the relay option is fitted, via a contact closure. The threshold limit may be set by the user to any value between
1 and 100 percent.
To set the disk full alarm value, press the MENU button and then select the PROGRAM button. Use the
↑↑↑↑↑ (up
arrow) and ↓↓↓↓↓ (down arrow) buttons to select the “Record Setup” option and press the ENTER button. This brings up
the Record Setup menu. Use the ↑↑↑↑↑ (up arrow) and ↓↓↓↓↓ (down arrow) buttons to highlight the “Disk Full Alarm” option
and press ENTER. There are two menu options, Setpoint and Contact #. Select “Setpoint” and press ENTER. Use
the alphanumeric keypad to enter the percentage point at which the disk will indicate nearly full (0 to 100 percent,
where 0 implies do not indicate disk full) and press ENTER. Select “Contact #” and press ENTER. Use the numeric
keypad to enter a relay contact number, 1 through 6, or 0 for no contact closure. Press ENTER to return to the
Record Setup menu.
A message will pop up on the display when the disk usage equals the percentage value entered above and the
corresponding relay contact will close. Note that in all cases a message will pop up on the display and the relay
contact will close when the disk is full.
Media Missing
Buffer Time
00:04:40
Figure 3-16
Buffer Time Window
Sample Rate Buffer Time
8 Seconds/Sec 2.5 Min
1 Sample/Sec 20 Min
10 Sec/Sample 3 Hrs
1 Min/Sample 20 Hrs