Clear Internal Program Memory; Data Card Operation; Data Logging To A Data Card; Storage Capability For A 1 Mb Data Card - Lakeshore 340 User Manual

8.3.10 Clear Internal Program Memory

To clear the internal program memory, press the Program key. Use the Next Setting key to highlight Clear
program memory. Press the Enter key. You now see the message Press SAVE SCREEN to clear,
CANCEL SCREEN to abort. Press the Save Screen key to clear the internal program memory.
8.4

DATA CARD OPERATION

The Model 340 has a data card slot located on the left side of the real panel, underneath the power input
assembly. Although the pins in the data card slot conform to the PCMCIA standard, the slot is not a PCMCIA
interface. The data card slot has the ability to read and write to Flash Cards. The data cards available from
Lake Shore are detailed in Paragraph 10.2 – Accessories.
Data card operation is provided in the following paragraphs. Data logging is described in Paragraph 8.4.1.
Reading from a data card is described in Paragraph 8.4.2. Writing to a data card is described in Paragraph
8.4.3. Finally, erasing a data card is described in Paragraph 8.4.4.
8.4.1

Data Logging To A Data Card

The Model 340 can store reading data or control data in an SRAM Data Card with the data logging feature.
Stored data can be viewed on the display or read over computer interface at a later time.
Data is taken in groups called records. Each record consists of a timestamp and up to four points of data in
any combination of the input readings, setpoints or control outputs. The Model 340 can utilize SRAM Data
Cards from 64K to 1M byte. Larger data cards can be used but only the first 1M byte is utilized by the
instrument. Table 8-2 indicates the maximum number of records that can be stored in a 1MB SRAM Data
Card based on the number of data points in a record.
To enter the data log functions, insert an SRAM Data Card into the data card slot and press the Data Card
Key. The Identifying Card... message is
displayed, followed by the DATACARD screen. It
shows the recognized Data Card type and its
capacity on the bottom of the screen, together
with its battery and the WriteProtect switch status.
Note: Batteries are not included with SRAM Data
Cards purchased from Lake Shore.
Highlight Data Logging and press the Enter key.
The DATA LOGGING screen is displayed with
five menu items. Number of Records already
logged in the SRAM Data Card and its logging
status are also shown on the bottom of the
screen. Use the Next Setting or Previous
Setting key to select each menu item.
Instrument Programming
Lake Shore Model 340 Temperature Controller User's Manual
Table 8-2. Storage Capability for a 1MB Data Card
Records
65000
45000
34000
28000
Data Points
1
2
3
4
DATA CARD
Data Logging
Read DataCard
Write DataCard
Erase DataCard
Card: SRAM 1MB, Battery OK
DATA LOGGING
Setup data log
Start logging data
Stop logging data
View logged data
Dump logged data
Records: 000000 Status: Stopped
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