LEYBOLD COMBIVAC CM 52 User manual

Catalog No.
230115
230116
Vacuum Gauge Controller
CM 52COMBIVAC
Instruction Manual GA300369449_002_C1

GA300369449_002_C1 –08/2017
3
0. Table of Contents
0. Table of Contents 3
0.1 Table of Figures 7
0.2 Table of Tables 7
1. Description 8
1.1 Validity 8
1.1.1 Part Number 8
1.1.2 Nameplate 8
1.2 Conforming Utilisation 8
1.3 Responsibility and Warranty 9
1.4 Shipping Damage 9
2. Safety 10
2.1 General Information 10
2.2 Key to the Symbols 10
2.3 Basic Safety Information 10
3. General Equipment Description 11
3.1 COMBIVAC CM 52 11
3.2 THERMOVAC (Pirani) Method of Measurement 11
3.3 Principle of Measurement for IONIVAC (Extractor or Bayard-Alpert) 11
3.4 Connectable Gauge Heads 12
3.5 Gauge Head Cables 12
3.6 Accessories 12
4. Technical Data 13
4.1 General Data 13
4.1.1 Mechanical Data 13
4.1.2 Standard Parameters (factory defaults) 14
4.1.2.1 Sensor-dependent Parameters 14
4.1.2.2 General Parameters 14
4.1.3 Environment 14
4.1.4 Standards 15
4.2 Mains Connection 15
4.3 Measurement Channels 15
4.3.1 TM Measurement Channels 15
4.3.2 IONIVAC Measurement Channel 16
4.3.3 Measurement 16

4
GA300369449_002_C1 –08/2017
4.4 Switching Functions / Relay Outputs 16
4.4.1 Switching Function Relay 16
4.4.2 Ready Signal Relay 16
4.5 Outputs and Inputs 17
4.5.1 Analog Output 17
4.5.2 External Control 17
4.5.3 Serial Interfaces 17
4.5.3.1 RS232 17
4.5.3.2 RS485 17
4.5.4 Profibus-DP 17
5. Installation 18
5.1 Supplied Equipment 18
5.2 Mechanical Installation 18
5.2.1 Rack Installation 19
5.2.2 Front Panel Installation 19
5.2.3 Benchtop Instrument 20
5.3 Connections 21
5.3.1 Rear Side of the Instrument 21
5.3.2 Mains Connection 21
5.3.3 Erdung 22
5.3.4 THERMOVAC Measurement Channels (TM 1 and TM 2) 22
5.3.5 IONIVAC Measurement Channel (IONIVAC) 22
5.3.6 Analog Output and External Control (Analog Output / Extern Control) 23
5.3.7 RS232 / RS485 Interface (Interface RS232 / RS485) 24
5.3.8 Profibus-DP Interface (Interface Profibus-DP) 24
5.3.9 Relay Output (Relay Output) 25
6. Operation 26
6.1 Front Panel 26
6.1.1 Display 26
6.1.2 Control Pushbuttons 27
6.2 Switching on and off 27
6.2.1Switching on 27
6.2.2 Switching off 27
6.3 Operating Modes 28
6.4 Measurement Mode 28
6.4.1 Selection 28
6.4.2 Description 28
6.4.3 Pushbutton Functions 29
6.4.3.1 Measurement Channel Selection 29
6.4.3.2 Parameter Mode Selection 29
6.4.3.3 Switching the IONIVAC on 29
6.4.3.4 Funktion Degas 30
6.4.3.5 Switching the IONIVAC off 30
6.4.4 THERMOVAC Alignment 31
6.5 Parameter Mode 32
6.5.1 Selection 32
6.5.2 Parameter Groups 32
6.5.3 Operating Concept 33

GA300369449_002_C1 –08/2017
5
7. Parameters 34
7.1 Switching Function Parameters (PArA SP) 34
7.1.1 Basic Terms 34
7.1.2 Configuring the Switching Functions 35
7.1.3 Adjustment Range 35
7.2 Sensor Parameters (PArA SEn) 36
7.2.1 Filament Material THERMOVAC (FIL) 36
7.2.2 Measured Value Filter (FiLt) 36
7.2.3 Type of Gas Correction THERMOVAC (GAStM) 37
7.2.4 Type of Gas Correction IONIVAC (GASiE) 37
7.2.5 Sensor Switch-on Type (S-on) 38
7.2.6 Sensor Switch-on Value ( t-on) 38
7.2.7 Switch-on Delay for Extractor Gauge Head (dELAy) 38
7.2.8 Sensor Switch-off Type (S-oFF) 39
7.2.9 Sensor Switch-off Value (t-off) 39
7.2.10 Sensitivity Setting for IONIVAC Gauge Head (SEnS) 39
7.3 General Parameters (PArA GEn) 40
7.3.1 Unit of Measurement (unit) 40
7.3.2 Analog Output (AnALoG) 40
7.3.3 Display Format (diGit) 40
7.3.4 Display Brightness (bri) 41
7.3.5 Profibus (Pb) 41
7.3.6 Baud Rate (bAud) 41
7.3.7 Interface (rS) 41
8. Computer Interface 42
8.1 Basics 42
8.1.1 Connection 42
8.1.2 Nomenclature 42
8.2 Communication 43
8.2.1 Protocol 43
8.2.2 General String Structure 43
8.3 Command Set (Mnemonics) 44
8.3.1 Command Overview 44
8.3.2 RPV (Read Pressure Value) 45
8.3.3 RVN (Read Version Number) 45
8.3.4 RSS (Read Set Point Status) 45
8.3.5 SHV (Set HV on/off) 46
8.3.6 SDG (Set Degas on/off) 46
8.3.7 SKL (Set Key Lock on/off) 46
8.3.8 SAC (Save Actual Configuration) 47
8.3.9 RSA (Read Serial Adress) 47
8.3.10 SSA (Set Serial Adress) 47
8.3.11 RGP (Read General Parameter) 47
8.3.12 SGP (Set General Parameter) 48
8.3.13 RGC (Read Gas Correction) 49
8.3.14 SGC (Set Gas Correction) 49
8.3.15 RSC (Read Sensor Control) 49
8.3.16 SSC (Set Sensor Control) 50
8.3.17 RSP (Read Set Point) 50
8.3.18 SSP (Set Set Point) 51

6
GA300369449_002_C1 –08/2017
9. Maintenance and Service 52
9.1 Maintenance 52
9.1.1 General Maintenance Information 52
9.2 Troubleshooting 52
9.2.1 Fault Indication 52
9.2.2 Error Messages 52
9.2.3 Help the Case of Faults 53
9.2.4 Fuse Replacement 53
9.2.5 Repair 53
10. Storing and Waste Disposal 54
10.1 Packaging 54
10.2 Shelving 54
10.3 Waste Disposal 54
Annex 1 - EU Declaration of Conformity 58
Annex 2 - Declaration of Contamination 59

GA300369449_002_C1 –08/2017
7
0.1 Table of Figures
Figure 1 –Nameplate (Examble) 8
Figure 2 –COMBIVAC CM 52 dimensions (in mm) 13
Figure 3 –Rack installation 19
Figure 4 –Front panel cutout dimensions (in mm) 19
Figure 5 –Preparing the top side of the instrument for utilisation as a benchtop unit 20
Figure 6 –Preparing the bottom side of the 20
Figure 7 –Rear panel of the instrument 21
Figure 8 –Connection for the IONIVAC gauge head 22
Figure 9 –Connection plug for analog output and external control (SUB-D, 15-way) 23
Figure 10 –Interface connection socket (SUB-D, 9-way) 24
Figure 11 –Connection socket for Profibus DP interface (SUB-D, 9-way) 24
Figure 12 –Connection plug for relay output (SUB-D, 25-way) 25
Figure 13 –Front panel 26
Figure 14 –Operating the pushbutton CHANNEL 29
Figure 15 –Operating the pushbutton PARA 29
Figure 16 –Operating the pushbutton UP 29
Figure 17 –Operating the pushbutton UP 30
Figure 18 –Operating the pushbutton DOWN 30
Figure 19 –Full-scale alignment for the THERMOVAC gauge head 31
Figure 20 –Zero alignment for the THERMOVAC gauge head 31
Figure 21 –Behaviour of a switching function in response to pressure changes 35
0.2 Table of Tables
Table 1 –Part Numbers 8
Table 2 –Connectable gauge heads 12
Table 3 –Gauge head cables 12
Table 4 –Accessories 12
Table 5 –Switching parameters, factory defaults 14
Table 6 –Sensor parameters, factory defaults 14
Table 7 –General parameters, factory defaults 14
Table 8 –Supplied equipment 18
Table 9 –Display components 26
Table 10 –Display in the measurement mode 28
Table 11 –Parameter groups and corresponding parameters 32
Table 12 –Available sensor parameters 36
Table 13 –Values for the parameter FIL 36
Table 14 –Values for the parameter unit 40
Table 15 –Values for the parameter AnALoG 40
Table 16 –Values for the parameter diGit 40
Table 17 –Values for the parameter bri 41
Table 18 –Values for the parameter Pb 41
Table 19 –Values for the parameter bAud 41
Table 20 –Values for the parameter rS 41
Table 21 –Terms Computer Interface 42
Table 22 –Control Characters Computer Interface 42
Table 23 –Mnemonics for read commands 44
Table 24 –Mnemonics for write commands 44
Table 25 –Mnemonics for read and write commands 44
Table 26 –Error messages 53

8
GA300369449_002_C1 –08/2017
1. Description
1.1 Validity
1.1.1 Part Number
This document applies to the following products:
Part Number
Product
Version
Serial
Number
230115
COMBIVAC CM 52
Three-channel measuring instrument for passive vacuum sensors
1.0
et seq.
100
et seq.
230116
COMBIVAC CM 52
Three-channel measuring instrument for passive vacuum sensors
with Profibus DP
1.0
et seq.
100
et seq.
Table 1 –Part Numbers
1.1.2 Nameplate
A nameplate is located on the bottom side of the instrument. When communicating with
Leybold GmbH, stating the information on the nameplate is necessary. For this reason
please enter the following information:
Figure 1 –Nameplate (Examble)
1.2 Conforming Utilisation
The COMBIVAC CM 52 is a universal vacuum gauge which by combining two principles of
measurement –Pirani (Thermovac) and ionisation gauge (Ionivac) provides full coverage
and control over vacuum pressures ranging between 1·10-12 mbar and atmospheric
pressure. One IONIVAC sensor (Extractor or Bayard-Alpert) or a maximum of 2
THERMOVAC sensors can be connected.
The built-in RS232/RS485 as well as Profibus-DP interfaces permit computer-controlled
operation as well as the exchange of the measurement data between the COMBIVAC CM
52 and a computer.
Operate all connected sensors in agreement with the information given in the corresponding
Operating Instructions.
NOTICE:
Based on the technical data please check first whether your measuring
instrument is suited to your kind of application.

GA300369449_002_C1 –08/2017
9
1.3 Responsibility and Warranty
The Leybold GmbH will not assume any responsibility or warranty in case the operator or
third persons
•do not observe the information given in this document.
•do not use the product as intended.
•modify the product in any way (conversions, repair work etc).
•operate the product with accessories not listed in the corresponding product
documentation.
Subject to technical alterations without prior notice. The figures are not binding.
1.4 Shipping Damage
•Examine the shipping package as to any external damage.
•In case any damage is determined, file a damage report to the forwarding agent and
the insurer.
•Retain the packaging material since damages can only be claimed when returning the
instrument in the original packaging of the manufacturer.
•Examine the delivery to ensure that it is complete.
•Examine the instrument as to any visually apparent damage.
DANGER: Damaged product.
Commissioning or operating a damaged product is dangerous to life.

10
GA300369449_002_C1 –08/2017
2. Safety
2.1 General Information
The COMBIVAC CM 52 is delivered ready for operation. Even so, we recommend that you
carefully read these Operating Instructions so as to ensure optimum operating conditions
right from the start.
This manual contains important information for understanding, installing, commissioning,
operating and troubleshooting the COMBIVAC CM 52.
2.2 Key to the Symbols
Important instructions relating to technical safety and safe operation are emphasised by
symbols.
DANGER or WARNING:
Information designed to prevent any kind of injury to persons.
DANGER:
Information designed to prevent injury to persons and damage to equipment
in connection with electricity.

NOTICE:
General information pointing to further information, respectively reference
sections.
2.3 Basic Safety Information
•During all work like installation, maintenance and repair activities, comply with the
pertinent safety regulations.
DANGER: Mains Voltage
Coming into contact with components at mains voltage level within the
instrument can be dangerous to life when inserting objects or allowing liquids
to enter the instrument.
WARNING: Improper usage.
Improper usage can damage the instrument. Use the instrument only in
agreement with the specifications issued by the manufacturer.
WARNING: Wrong Connection and Operating Data.
Wrong connection and operating data can damage the instrument. Comply
with all specified connection and operating data.

GA300369449_002_C1 –08/2017
11
3. General Equipment Description
3.1 COMBIVAC CM 52
This combination instrument offers three measurement channels, two THERMOVAC and
one IONIVAC. Thus, measurements and checkingof vacuum pressures over 15full decades
from 1·10-12 to atmospheric pressure is possible. Six switching thresholds permit the
integration of the COMBIVAC CM 52 within complex vacuum control facilities. The two
THERMOVAC channels are immediately active upon powering up. The IONIVAC channel
may be switched on and off by one of the two THERMOVAC channels or externally or
manually. The operating status of the switching thresholds and the measurement systems
is displayed and signalled corre-spondingly through the outputs.
3.2 THERMOVAC (Pirani) Method of Measurement
This method of measurement covering the range of 5·10-4 to 1·103mbar utilises the heat
conductance of the gas for the purpose of measuring its pressure. In order to attain a
response time which is as short as possible, all THERMOVAC instruments rely exclusively
the principle of the controlled Pirani where the measurement filament is part of a Wheatstone
Bridge. When the temperature of the filament changes due to pressure changes, then the
bridge is unbalanced. The quickly responding control circuitry adapts the heating power for
the filament so that the filament temperature again reaches its nominal level thereby
balancing the measurement bridge again. The displayed pressure is dependent on the type
of gas. By default the display of the instruments has been calibrated for nitrogen,
respectively air.
3.3 Principle of Measurement for IONIVAC (Extractor or Bayard-Alpert)
This principle of measurement relies on the ionisation probability of gases which is here
used for measuring pressures. The ion current produced during ionisation is output as a
signal which is proportional to the pressure. The Bayard-Alpert gauge head (IE 414) is suited
for pressure measurements in the high vacuum and ultra-high vacuum ranges. The Extractor
gauge head (IE 514) has been specially designed for measurements in the UHV and XHV
ranges.

12
GA300369449_002_C1 –08/2017
3.4 Connectable Gauge Heads
The following gauge heads can be operated by the COMBIVAC CM 52:
Gauge heads
Type
Catalog number
THERMOVAC
TR 211, DN 16 KF
157 85
TR 211, 1/8“ NPT
896 33
TR 212, DN 16 KF
158 52
TR 212, DN 16 CF
157 86
TR 216, DN 16 KF
157 87
IONIVAC (BAYARD-ALPERT)
IE 414, DN 40 CF
158 66
IONIVAC (EXTRAKTOR)
IE 514, DN 40 CF
158 67
Table 2 –Connectable gauge heads
3.5 Gauge Head Cables
Designation
Specification
Catalog number
Gauge head cables
THERMOVAC
5 m
162 26
10 m
162 27
15 m
124 34
20 m
162 28
30 m
124 35
50 m
124 37
75 m
124 38
100 m
124 39
Gauge head cables to IONIVAC
5 m
158 68
10 m
150 88
5 m, bakeable up to 200 °C
158 44
Extension cables for IONIVAC
10 m
245 002
20 m
200 02 937
50 m
245 010 V01
up to 100 m
(application dependent)
upon request
Table 3 –Gauge head cables
3.6 Accessories
Designation
Specification
Catalog number
Options
Installation frame 19“
161 00
Blank panel 1/4 19“
161 02
Table 4 –Accessories

GA300369449_002_C1 –08/2017
13
4. Technical Data
4.1 General Data
4.1.1 Mechanical Data
Dimensions: Width: 106.4 mm (1/4 19“)
Height: 128.4 mm (3 HE)
Depth: 185.0 mm
Wight: ≤1.4 kg
Installation depth: ≤280 mm approx. (including connected plugs)
Usage: Rack installation
Front panel installation
Benchtop instrument
Figure 2 –COMBIVAC CM 52 dimensions (in mm)

14
GA300369449_002_C1 –08/2017
4.1.2 Standard Parameters (factory defaults)
4.1.2.1 Sensor-dependent Parameters
Parameter
Parameter description
THERMOVAC
setting
IONIVAC
setting

Switching thresold 1 –lower threshold
.
.

Switching thresold 1 –upper threshold
.
.

Switching thresold 2 –lower threshold
.
.

Switching thresold 2 –upper threshold
.
.
Table 5 –Switching parameters, factory defaults
Parameter
Parameter description
THERMOVAC
setting
IONIVAC
setting

THERMOVAC filament material
 (tungsten)
-

Filter factor
-


THERMOVAC gas type correction characteristic
 (nitrogen)
-

IONIVAC gas type correction factor
-
.

Switch-on type for sensor
-


Switch-off type for sensor
-
 (IE 514)
 (IE 414)

Sensitivity for IONIVAC gauge head
-
. (IE 514)
(IE 414)
Table 6 –Sensor parameters, factory defaults
4.1.2.2 General Parameters
Parameter
Parameter description
Setting

Displayed unit of measurement


Analog output
 (CM 52)

Number of displayed digits


Display brightness


Profibus address


Baud rate
.

Serial interface

Table 7 –General parameters, factory defaults
4.1.3 Environment
Temperature: Storage: -20 –+60 °C
Operation: +5 –+50 °C (sea level)
+5 –+30 °C (2000 m above sea level)
Relative atmospheric humidity: max. 80 % (up to 30 °C)
decreasing to max. 50 % (from 40 °C)
Usage: in interior rooms (height 2000 m max. above sea level)
Protection category: IP40

GA300369449_002_C1 –08/2017
15
4.1.4 Standards
•Conformity with respect to Low Voltage Directive 2014/35/EU
•Conformity with respect to EMC Directive 2014/30/EU
•Conformity with respect to RoHS Directive 2011/65/EU
•Conformity with respect to WEEE Directive 2012/19/EU
International/national standards as well as specifications:
•DIN EN 61010-1 (2011)
(Safety requirements for electrical equipment for measurement, control and
laboratory use).
•DIN EN 61326-1 (2013)
(Electrical equipment for measurement, control and laboratory use –EMC
requirements. Industrial interference immunity; electromagnetic emissions household
sector Class B).
4.2 Mains Connection
Voltage: 100 –240 VAC
Frequency: 50/60 Hz
Fuses: 2 x T1.6A H
Power consumption: < 60 W
Current consumption: 1.3 –0.5 A approx.
Overvoltage category: II
Protection category: 1
Connection: Cold-device plug IEC 60320 C14
4.3 Measurement Channels
Number: 2 THERMOVAC measurement channels
1 IONIVAC measurement channel
Connection: 6-way DIN socket for THERMOVAC
Metalock Bantam UTG0187SVDEU + BNC
for IONIVAC
4.3.1 TM Measurement Channels
Measurement range: 5·10-4 –1000 mbar
Measurement inaccuracy: ± 20 % of measured value (10-3 –10-2 mbar)
± 15 % of measured value (10-2 –102mbar)
Cable length: up to 100 m
Cable length alignment: automatic

16
GA300369449_002_C1 –08/2017
4.3.2 IONIVAC Measurement Channel
Extraktor (IE514)
Bayard-Alpert (IE414)
Measurement range:
2·10-12 –1·10-4 mbar
2·10-11 –1·10-2 mbar
Measurement inaccuracy:
± 2% of measured
value, ± 5·10-13 mbar
± 2 % of measured value,
± 3·10-13 mbar
Filter time constant:
15 …7 …3 …1 (slow …fast)
Anode voltage:
Operation:
220 V
220 V
Degassing:
480 V
480 V
Reflector voltage:
Operation:
205 V
Cathode voltage:
Operation:
100 V
80 V
Degassing:
10 V
20 V
Emission current:
Operation:
1.6 mA
100 µA / 10 mA
Degassing:
45 mA
90 mA
Switching point of emission current:
100 µA►10 mA: 1·10-6 mbar
10 mA►100 µA: 1·10-5 mbar
Cable length:
up to 50 meters
4.3.3 Measurement
Display rate:
4 s-1
Unit of measurement:
mbar, Pa, Torr
4.4 Switching Functions / Relay Outputs
4.4.1 Switching Function Relay
Number: 6
Assignment: 2 per channel
Response time: < 50 ms
Adjustment range: EXTRAKTOR 1·10-11 –1·10-4 mbar
BAYARD-ALPERT 1·10-8 –5·10-3 mbar
THERMOVAC 5·10-3 –5·102mbar
Hysteresis: adjustable ≥10 % of measured value
Contact type: changeover contact, floating
Load (resistive): Switched current: 1 A max.
Switched voltage: max. 30 VAC / 30 VDC
Service life: Mechanical: 5·106switching cycles
Electrical: 105switching cycles at maximum load
Connection: SUB-D, 25-way, plug
4.4.2 Ready Signal Relay
Number : 3
Assignment: 1 per channel
Response time: < 50 ms
Contact type: normally open contact, floating
Load (resistive): Switched current: 1 A max.
Switched voltage: max. 30 VAC / 30 VDC
Service life: Mechanical: 5·106switching cycles
Electrical: 105switching cycles at maximum load
Connection: SUB-D, 25-way, plug

GA300369449_002_C1 –08/2017
17
4.5 Outputs and Inputs
4.5.1 Analog Output
Number: 1 per measurement channel
Voltage range: 0 –10 VDC (limit values 0 –10.5 VDC)
Output voltage for fault: 10.2 –10.5 VDC
Deviation of display value: ± 0.2 %
Internal resistance: 100 Ohm
Characteristic: logarithmic
Measurement
Channel

(CM 31 for TM only)

(CM 52)
IONIVAC
1.0 VDC/decade (0 V ≙1·10-12 mbar)
p = 10-12 mbar · 10U[V]
p = 10-10 Pa · 10U[V]
p = 0.75·10-13 Torr · 10U[V]
1.0 VDC/decade (0 V ≙1·10-12 mbar)
p = 10-12 mbar · 10U[V]
p = 10-10 Pa · 10U[V]
p = 0.75·10-13 Torr · 10U[V]
THERMOVAC
1.67 VDC/decade (0 V ≙ 1·10-3 mbar)
p = 10-3 mbar · 10(U[V]/1.67V)
p = 10-1 Pa · 10(U[V]/1.67V)
p = 0.75·10-3 Torr · 10(U[V]/1.67V)
1.286 VDC/decade (1.9 V ≙ 5·10-4 mbar)
p = 5·10-4 mbar · 10((U[V]-1.9V)/1.286V)
p = 5·10-2 Pa · 10((U[V]-1.9V)/1.286V)
p = 3.75·10-4 Torr · 10((U[V]-1.9V)/1.286V)
Response time: 100 ms approx.
Resolution: 10 Bit
Connection: SUB-D, 15-way, plug (jointly used together with the
connection for external control)
4.5.2 External Control
PLC compatible logic level: (Low) < 7 VDC; 0 A
(High) > 13 VDC; 7 mA (at 24 V DC)
Contact via relay: 24 VDC approx., is provided by the instrument via
a self-resetting fuse (100 mA)
Connection: SUB-D, 15-way, plug (jointly used with the analog output
connection)
4.5.3 Serial Interfaces
4.5.3.1 RS232
Standard: RS232
Parameters: 8 data bits, 1 stop bit, no parity, no protocol
Signals: RXD and TXD
Baud rate: 9600, 19200, 38400 baud
Connection: SUB-D, 9-way, socket (jointly used with RS485)
4.5.3.2 RS485
Standard: RS485 (half-duplex)
Parameters: 8 data bits, 1 stop bit, no parity, no protocol
Signals: A and B
Baud rate: 9600, 19200, 38400 baud
Connection: SUB-D, 9-way, socket (jointly used with RS232)
4.5.4 Profibus-DP
Standard: Profibus-DP
Connection: SUB-D, 9-way, socket

18
GA300369449_002_C1 –08/2017
5. Installation
5.1 Supplied Equipment
Designation
Quantity
COMBIVAC CM 52 or CM 52PB
1
Mains cord with shockproof plug (EU)
1
Mains cord with shockproof plug (US)
1
Operating Instructions (each GER and ENG)
1
Spare fuses
2
Neck collar screws
4
Plastic sleeves
4
Edge protection
2
Adhesive feet
2
Table 8 –Supplied equipment
5.2 Mechanical Installation
The COMBIVAC CM 52 can be used as follows:
•Rack installation
•Front panel installation
•Benchtop instrument
WARNING: Powering down
Install the instrument or place it so that you are in a position to operate the
mains power switch at any time or ensure that the instrument can be
deenergised at any time.

GA300369449_002_C1 –08/2017
19
5.2.1 Rack Installation
The COMBIVAC CM 52 has been designed for installation within a sub-rack (19", 3 HU) in
accordance with DIN EN 60297 (IEC 60297) ( Figure 3, page 19). For this purpose the
supplied equipment includes four neck collar screws and four plastic sleeves.
Figure 3 –Rack installation
•Attach the sub-rack within the rack.
•Push the COMBIVAC CM 52 into the sub-rack.
•Affix the instrument to the sub-rack with the neck collar screws and the plastic sleeves
included in the delivery.
5.2.2 Front Panel Installation
For panel mounting of the instrument, the following cutout ( Figure 4, Page 19) is
required:
Figure 4 –Front panel cutout dimensions (in mm)
•Guide the COMBIVAC CM 52 into the cut-out.
•Affix the instrument with the neck collar screws and the plastic sleeves included in the
delivery.

20
GA300369449_002_C1 –08/2017
5.2.3 Benchtop Instrument
When intending to use the COMBIVAC CM 52 as a benchtop instrument, then proceed as
follows:
•Push one of the two edge protection rubber pieces included in the delivery over the top
edge of the front panel ( Figure 5, page 20)
•Place the COMBIVAC CM 52 on its back ( Figure 6, page 20)
•Push the second edge protection rubber piece included in the delivery onto the bottom
edge of the front panel
WARNING: Risk of suffering injury.
When using the COMBIVAC CM 52 as a benchtop instrument fit the two edge
protection rubber pieces onto the top and bottom edge of the front panel so
as to avoid injury by sharp edges.
•Stick the two rubber feet included in the delivery onto the bottom of the housing.
Figure 5 –Preparing the top side of the instrument
for utilisation as a benchtop unit
Figure 6 –Preparing the bottom side of the
instrument for utilisation as a benchtop
unit
•Turn the COMBIVAC CM 52 over again and move it to the desired place.