Lake Shore Model 340 Temperature Controller User’s Manual
8-14 Instrument Programming
8.4.1.1 Log Setup
To setup the data log, highlight Setup data log and
press the Enter key. The SETUP DATA LOG screen
appears.
Every Sets the interval for storing records as one record every 1 to 3600 readings or one
record every 1 to 3600 seconds. The interval number is set first followed by units.
readings/seconds Selects the unit of the logging rate. Every 20 readings equals 1 second, because the
Model 340 updates the readings 20 times a second.
Start Mode Selecting Clear clears old records before starting data logging. Selecting Continue
continues data logging and adds new records to existing data.
Overwrite Yes: Data logging continues beyond the maximum number of records specified and
overwrites old records with new.
No: Data logging stops at the maximum number of records specified.
Type Specifies the data type of the specified Point. Five data types are available to log:
(1) Input reading
(2) SP1 (Setpoint of Control Loop 1)
(3) SP2 (Setpoint of Control Loop 2)
(4) Out1 (Output of Control Loop 1)
(5) Out2 (Output of Control Loop 2)
If no data logging is necessary for the specified Point, select None.
Note: Changing Type will erase stored records.
Input Specifies Input channel to log. This field is available only if Input is specified in the
Type field.
Note: Changing Input will erase stored records.
Source Specifies the source of the selected Input channel. TEMP K, TEMP C, MAX, MIN,
SENSOR, LINEAR can be chosen. This field is available only if Input is specified in the
Type field.
Note: Changing Source will erase stored records.
8.4.1.2 Starting Data Logging
To start data logging, highlight Start logging data and press the Enter key. The data logging starts
immediately and the Status on the right bottom of the DATA LOGGING screen will indicate Logging. The
Record counter on the left bottom of the same screen will increment as records are stored in the SRAM Data
Card.
NOTE: Data logging will not start if the Data Card is write protected, or it has full data and Continue is
selected in the Start Mode with No Overwrite.
8.4.1.3 Stopping Data Logging
To stop data logging, highlight Stop logging data and press the Enter key. The data logging stops
immediately and the Status on the right bottom of the DATA LOGGING screen will indicate Stopped. The
Record counter on the left bottom of the same screen shows the number of records that are currently stored
in the SRAM Data Card.
SETUP DATA LOG
Every: 1 readings Overwrite: NO
Start Mode: Continue
Point Type Input Source
1: None
2: None
3: None
4: None
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