4.9. System Settings

The settings screen contains various settings and information that aren’t specific to temperature inputs or outputs. Settings located here include, but are not limited to, Relays, Connectivity, Updates, and Reset. To navigate here, tap the Settings button located on the Navigation panel. The following screen will appear.

../_images/settings_screen.png

Figure 4.17 Model 346 Settings screen

Note

  • Firmware updates are discussed in the Service section.

  • Settings lock is discussed in the Operation section.

  • Relays are discussed in this Advanced operation section.

About

The About screen provides manufacturing information about the Model 346.

Field

Description

Model number

This field will always display 346.

Product name

This field will always display 346 Cryogenic Temperature Controller.

Serial number

The unique identifier for this specific 346, assigned during manufacturing.

Firmware version

The semantic version number assigned to the Lake Shore Firmware (LSFW) package presently running.

Calibration date

The date and time the 346 was last calibrated successfully at Lake Shore.

Calibration temperature

The ambient temperature the 346 was calibrated in at Lake Shore. This temperature is relevant when consuming the 1 year accuracy specifications for the 346.

About option cards

This screen displays information about the input option cards installed in slots E to H. If no card is installed, None will be displayed. If a card is installed, the cards Serial number, Calibration state, and Calibration date will be displayed.

Connectivity

The following fields are displayed on the Connectivity tab. More information about setting up Ethernet can be found in the remote operation section.

../_images/connectivity_screen.png

Figure 4.18 Connectivity screen

Field

Description

Ethernet

Touch the Ethernet box to see IP settings.

SCPI over TCP

Determines whether the 346 will respond to SCPI commands from the Ethernet connection. Must be enabled to communicate over Ethernet. When disabled, the 346 will not accept connection requests from clients.

Virtual serial port

Reports the non-settable configuration of the serial port. See the Remote Operation section for more information.

GPIB

Allows setting the GPIB address if the GPIB option card is installed.

Display & sound

The front panel display brightness can be adjusted for optimal viewing. The default value should work well in most standard room temperature environments, but deviations in room temperature and extreme viewing angles can cause the display brightness to require adjustment for optimal viewing.

As with many touchscreen LED backlit displays, keeping the brightness to a minimum will help to maximize the life of the display. The half-life of the display is rated with a typical value of 30,000 hours. In addition, to help further maximize the life of the display, the Model 346 source implements an auto dimming function when the display has not been touched for a prolonged period of time.

The Model 346 will produce sounds on various presses of the screen as a means to provide feedback to the user that a key press has occurred. The volume setting can be set to 100%, 75%, 50%, 25%, or off.

Alarms have their own volume control. The Alarm volume setting can be set to 100%, 75%, 50%, 25% or Quietest.

../_images/display_sound_screen.png

Figure 4.19 Display & sound screen

Date & time

The Model 346 contains a real-time clock, allowing the current date, time, and time zone to be stored. The time, date and time zone can be set and viewed via the front panel or over the remote interface.

In addition, the Model 346 has a feature to automatically set its date and time with a network connection.

Interface Commands:
SYSTem:DATE
SYSTem:AUTODATETIME
SYSTem:TIME
SYSTem:TZONE
../_images/date_time_screen.png

Figure 4.20 Date & time screen

Reset

The Model 346 has two types of settings: instrumentation and system. Instrumentation settings includes settings that are unique to the instrument, such as sensor type, output mode, PID, and ramp rate. System settings are settings common to most instruments, such as volume, brightness and TCP/IP settings. Both types of settings are stored in nonvolatile memory and can be reset to defaults.

../_images/reset_screen.png

Figure 4.21 Reset screen

Reset instrumentation settings

Instrumentation settings are stored in non-volatile memory. Tap Reset instrumentation settings to reset the Model 346 to the following default settings:

Table 4.3 Input Setup—General Default Values

Input Setup—General

Default

Sensor type

Diode

Filter

Off

Input name

Input A (B, C, D)

Temperature limit

0 K (Off)

Input units

Kelvin

Curve

None
Table 4.4 Input Setup—Diode Default Values

Input Setup—Diode

Default

Range

2.5 V (Silicon)

Diode current

10 μA
Table 4.5 Input Setup—Platinum/NTC RTD Default Values

Input Setup—Platinum/NTC RTD

Default

Autorange

On

Current reversal

On
Table 4.6 Output Setup Default Values

Output Setup

Default

Output mode

Off

Control input

Input A for Output 1; Input B for Output 2; C1 for Output 3; D1 for Output 4; None for Outputs 5 to 8

Heater resistance

25 Ω

Power up enable

Off

Output units

Power (W)

Max output

100 W
Table 4.7 Alarm Default Values

Alarm

Default

Alarm

Off
Table 4.8 Relay Default Values

Relay

Default

Relay

Off
Table 4.9 PID/Manual Heater Power (MHP) Output Default Values

PID/Manual Heater Power (MHP) Output

Default

Proportional (P)

50.0

Integral (I)

20.0

Derivative (D)

0.0

Manual Output

0.000%
Table 4.10 Heater Default Values

Heater

Default

Heater range

Off

Autorange

On
Table 4.11 Setpoint Default Values

Setpoint

Default

Setpoint value

0.000 K
Table 4.12 Zone Settings—All Zones Default Values

Zone Settings—All Zones

Default

Upper boundary

0.000 K

Proportional (P)

50.0

Integral (I)

20.0

Derivative (D)

0.00

Manual output

0.000%

Range

Off

Ramp rate

0.000 K/min

Control input

Default

Output limit

100.000%

Reset to factory defaults

If necessary, the Model 346 instrument settings can be restored to factory defaults. System settings are stored in non-volatile memory. A factory default reset will reset both instrumentation settings and system settings. As with the reset instrumentation settings function, a factory default will not affect calibration. In addition, user curves will not be cleared.

When a factory reset in initiated, diagnostic logs and user added firmware repositories are cleared (the default firmware.lakeshore.com/production remains). In addition, the following system settings are reset back to their default state:

Table 4.13 Connectivity—General Default Values

Connectivity—general

Default

SCPI over TCP

Disabled

TCP socket port number

7777
Table 4.14 Connectivity—Ethernet Default Values

Connectivity—Ethernet

Default

IP Configuration

DHCP

Static IP

192.168.0.12

Static Gateway

192.168.0.255

Static Subnet mask

255.255.255.0

DNS 1

8.8.8.8

DNS 2

8.8.4.4
Table 4.15 Connectivity—GPIB Default Values

Connectivity—GPIB

Default

Address

12
Table 4.16 Display and Sound Default Values

Display and sound

Default

Brightness

Suggested

Volume

50

Alarm volume

50
Table 4.17 Date and Time Default Values

Date and time

Default

Automatic date and time

Disabled

Time zone

GMT