LEYBOLD COMBIVAC CM 31 User Manual

COMBIVAC CM 31
Cat. No.
157 89, 896 89, 897 89
Operating Instructions
Vacuum Pumps Instrumentation Fittings and Valves LEYBOLD VACUUM
GA 09.504 / 5.02

LEYBOLD COMBIVAC CM 31 Specifications

General

Weight	3.5 kg
Supply voltage	24 V DC
Ultimate Pressure	0.5 mbar
Power Supply	24 VDC
Operating Temperature	0 to 50 °C
Storage Temperature	-20 to 70 °C
Measurement Range	1E-9 mbar to 1000 mbar

Summary

Description

1.1 General

General information about the COMBIVAC CM 31, its readiness for use and importance of instructions.

1.2 Technical data

Presents the technical specifications of the COMBIVAC CM 31, covering measurement ranges, units, sensors, and interface details.

1.3 Technical description

Detailed explanation of measurement principles (THERMOVAC, PENNINGVAC) and interfaces.

1.4 Equipment

Lists supplied equipment and available accessories for the COMBIVAC CM 31.

Operation

2.1 Start-up

Guides the user through the initial start-up process, including power connection and self-test.

2.2 Electrical connection

Explains how to connect the instrument to AC power, set line voltage, and replace fuses.

2.3 Controls and their functions

Explains the front panel controls, displays (bar graph, digital), and their functions.

2.4 Supply and socket connections on the rear

Details the rear panel connections for AC power, gauges, and terminals.

2.5 Installing the instrument

Provides instructions for installation, including rack, panel, and table-top mounting.

2.6 Checking the equipment functions

Explains how to check TM and PM measurement channels using test gauges.

2.7 Alignment of the THERMOVAC gauge heads

Describes the procedure for aligning THERMOVAC gauge heads to maintain accuracy.

2.8 Switching off

Simple instructions for switching off the instrument by disconnecting power.

2.9 Status messages

Explains various status messages like FAIL and FAULT, indicating sensor or system issues.

2.10 Chart recorder output tables

Provides tables detailing chart recorder output for TM and PM measurement channels.

RS 232 C interface

3.1 Description

Defines RS 232 C interface levels, modes (Printer, Remote Control), and basic operation.

3.2 Interface parameters

Details fixed interface parameters like baud rate, data format, and end characters for communication.

3.3 Initial operation

Covers initial setup for remote control and printer operation, including cable links and parameters.

3.4 Data output and data formats

Explains measurement data output formats for remote control and printer modes.

3.5 Interface commands and data input for A-series instruments with RS 232 C interface

Details commands for measurement data, parameter settings, and trigger adjustments.

3.6 Output of error messages

Explains the format and meaning of interface error messages transmitted upon request.

3.7 Program examples for setting the parameters

Provides sample remote control commands for setting instrument parameters via RS 232.

3.8 Examples for the cable link between the interface and an IBM®-PC

Shows examples of cable wiring for connecting the instrument to an IBM PC.

Maintenance

4.1 Service at LEYBOLD's

Instructions for sending equipment for service, including the requirement for a contamination declaration.

Brief operating instructions

1st parameter level

Overview of navigating the first parameter level for adjusting thresholds, modes, and gas correction.

2nd parameter level

Details parameter settings in the second level for units, display resolution, cable length, and analogue output.