Lake Shore 218S, User Manual

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Lake Shore Model 218 Temperature Monitor User’s Manual
Special Features 5-9
SoftCal™ Calibration Curve Creation (Continued)
The sixth display in the setting sequence appears. Use the number keys to input the voltage or
resistance of the third calibration data point, then press
Enter . Use the number keys to input the
temperature in Kelvin that corresponds to the voltage or resistance of the third calibration data point,
then press
Enter . The Model 218 creates and stores the SoftCal™ curve, but users must select the
curve for the appropriate input before it is used. If the third point is not used, press Enter twice
without entering any data.
Press Escape at anytime to cancel the SoftCal™ creation sequence and return to the normal display.
5.3 DATA LOGGING
The Model 218 has internal memory reserved for data logging. Reading data can be stored in the
instrument to be printed or read over computer interface at a later time. Data log setup parameters can
also be used to control printer operation. Active data logging and active printing cannot occur at the
same time.
Data is taken in groups called records. Up to eight readings can be logged or printed as one record.
Readings can be from any input and any source. Each record includes a time stamp. The Model 218
dedicates 12 Kbytes of memory to data logging. Table 5-2 indicates the maximum number of records
that can be stored based on the number of readings in a record.
Table 5-2. Storage Capability Based on Readings per Record
Records Readings
1500 1
1000 2
750 3
600 4
500 5
425 6
375 7
340 8
5.3.1 Log Setup
NOTE: Changing Log Setup will erase stored records.
To setup the data log function, press Log Setup . The first screen in the setting sequence appears.
Use the Data Selection keys to cycle through the different log modes listed below. When the desired
mode appears, press
Enter .
Off Disables Log functions. Log On/Off will not initiate logging, and current logging
stops. Selecting Off displays the Set Time screen next (see below).
Log Continuous Logs data to internal memory at regular intervals.
Log Event Logs to internal memory only when an input configured for logging goes into or
comes out of an alarm or error condition.
Print Continuous Sends data to printer using data log setup parameters. Sends one record at a
time with a minimum of 10 s between records.
Print Event Similar to Log Event. The instrument sends data to the printer instead of logging
it to internal memory. The second display in the setting sequence appears. Use
the Data Selection keys to specify the Overwrite status listed below. When the
desired status appears, press
Enter .