Pfeiffer Vacuum IMG 400 User manual

BG 5520 BEN / A (2018-10)
OPERATING INSTRUCTIONS
Translation of the original instructions
IMG 400
Ionization Gauge Controller

BG 5520 BEN / A (2018-10)IMG 400 2
Contents
1Introduction 4
1.1 Validity 4
1.2 Intended Use 4
1.3 Scope of Delivery 4
1.4 Safety 5
1.5 Liability and Warranty 6
2Technical Data 7
3Installation 11
3.1 Unpacking 11
3.2 Mechanical Installation 11
3.2.1 Desk-Top Device 11
3.2.2 Installation in a Control Panel 12
3.2.3 Rack Installation 13
3.3 Connecting 14
3.3.1 Back Side of the Device 14
3.3.2 Mains Connection 15
3.3.3 Ground 15
3.3.4 CH1 and CH2 16
3.3.5 CH3 and CH4 16
3.3.6 RELAY 17
3.3.7 CONTROL 18
3.3.8 RS232 18
3.3.9 Extension Slot (Option) 18
4Operation 19
4.1 Front Panel 19
4.1.1 Display 19
4.1.2 Control Buttons 21
4.2 Switching On and Off 23
4.2.1 Switching On 23
4.2.2 Switching Off 23
4.2.3 Delay Time 23
4.3 Operating Modes 23
4.4 Measurement Mode 24
4.4.1 Selecting Measurement Mode 24
4.4.2 Description 24
4.4.3 Selecting a Channel 24
4.4.4 Switching Emission On 25
4.4.5 Switching Emission Off 26
4.4.6 Emergency-Off Action 26
4.4.7 Switching Degas Function On 26
4.4.8 Switching Degas Function Off 27
4.4.9 Defining and Activating Offset 27
4.4.10 Deactivating Offset 28
4.5 Detail View Mode 29
4.5.1 Selecting Detail View Mode 29
4.5.2 Detail Groups 29
4.6 Parameter Mode 31
4.6.1 Selecting Parameter Mode 31
4.6.2 Parameter Groups 31
4.7 Basic Operation 33
4.8 Displaying and Handling System Errors 34
4.8.1 Displaying System Errors 34
4.8.2 Acknowledging Errors 34
4.8.3 Deleting Errors from the Error List 34
5Parameters 36
5.1 Switching Function Parameters (Setpoint) 36
5.1.1 Fundamental Terms 36
5.1.2 Configuring Switching Functions 37
5.1.3 Setting Range 37
5.2 General Parameters (General) 37
5.2.1 General Settings (Setup) 37
5.2.2 Interface Parameters (RS232) 39
5.2.3 Device Control (Control) 39
5.2.4 Recorder Outputs (Recorder) 40

BG 5520 BEN / A (2018-10)IMG400.opi 3
5.2.5 Display, Bar Graph (Disp.Bar) 42
5.2.6 Threshold Values (Threshold) 43
5.2.7 Behavior of the IMG 400 in Case of an Error (Error) 43
5.3 Gauge Parameters (Sensor) 46
5.3.1 Measuring Channel (Channel) 46
5.3.2 Measurement Filter (Filter) 46
5.3.3 Automatic Offset (Auto_OFS) 47
5.3.4 Sensitivity Adjustment (Cal_Full) 47
5.3.5 Filament Power Control (Fil.Pow) 48
5.3.6 Switching the Emission Current (Emis.Cur) 48
5.3.7 Adjusting the X-ray limit (X_Ray) 48
5.3.8 Automatic Gas Type Correction (Correct > Cor.Mode) 48
5.3.9 Additional Correction Factor (Correct > Cor.Gain) 49
5.3.10 User Defined Correction Factors (Correct > ClearAll, Index,
Factor, Press) 49
5.4 Current Amplifier Parameters (IoniAmp) 51
5.5 Gauge Control (Control) 51
5.5.1 Measuring Channel (General) 51
5.5.2 Gauge Activation Mode (Mode) 51
5.5.3 Activation Source (Source) 52
5.5.4 Activation and Deactivation Values (P_On, P_Off) 52
5.5.5 TPR Mode (TPR_Ctrl) 53
5.6 User Parameters (UserMode) 53
5.6.1 Parameters for Gauge Operation (Gauge) 53
5.6.2 Parameters For Current Amplifiers (Amplifier) 53
5.6.3 Configuring the Device (Amplifier) 54
5.7 Graphic Parameters (Detail Graphic) 55
5.7.1 Parameters and Functions 55
5.7.2 Trend Graphic 55
6Maintenance, Service 57
6.1 Maintenance 57
6.1.1 Cleaning 57
6.1.2 Resetting the Operating Hours 57
6.2 Program Transfer Mode 57
6.2.1 Preparations 57
6.2.2 Program Transfer 57
6.2.3 Restarting 58
6.3 Starting the IMG 400 With Default Parameters 58
6.4 Test Mode 59
6.4.1 Selecting the Test Mode 59
6.4.2 Test Parameters and Functions 61
6.4.3 CPU / Display 62
6.4.4 Current Measuring Amplifier (Amplifier) 63
6.4.5 Power Supply 65
6.4.6 Inputs / Outputs 66
6.4.7 IF 400x 67
7Storage and Disposal 68
7.1 Packaging 68
7.2 Storage 68
7.3 Disposal 68
8Accessories 68
Appendix 69
A: Default Parameters 69
B: Setting Ranges 73
C: Menu Structure 77
D: Error Messages 83
E: Legend for the Error Table 90
F: Literature 93
EU Declaration of Conformity 94
For cross-references within this document, the symbol (→XY) is used; for cross-
references to further documents listed under ‘Literature’, use is made of the symbol
(→[Z]).

BG 5520 BEN / A (2018-10)IMG 400 4
1 Introduction
This document applies to products with part number:
PT G25 400
The part number (No.) can be found on the product nameplate.
This Operating Manual is based on the firmware version V04.3. Previous firmware
versions may not have the complete functionality described in this Operating In-
structions.
If the device does not work as described, please check if it is equipped with this
firmware version. You can find the firmware version number of your device in the
[Detail] > [Info] > [MC-Board] menu (→«Info», 29).
We reserve the right to make technical changes without prior notice.
There is a type label attached to one side of the device. In all communication with
Pfeiffer Vacuum, please state the information on the type label.
The Ionization Gauge Controller IMG 400 is a versatile microprocessor controlled
ionization gauge controller for pressure measurements in the range
1×10-13 … 1.1×103hPa.
The concept and design of the controller allow for a reliable and complete inte-
gration in complex process control systems.
The IMG 400 can handle four measuring systems simultaneously. An optional
interface may be used for complete remote control of the device.
In the following, the Ionization Gauge Controller IMG 400 will be referred to as
«IMG 400».
Designation
No
Ionization Gauge Controller IMG 400
1
Operating Instructions German
1
Operating Instructions English
1
Mains cable, EUR version
1
Mains cable, US version 1
Casing feet, set
1
Collar screws
4
Plastic sleeves
4
1.1 Validity
1.2 Intended Use
1.3 Scope of Delivery

BG 5520 BEN / A (2018-10)IMG400.opi 5
All work described in this document may only be carried out by persons who have
suitable technical training and the necessary experience or who have been instruc-
ted by the end user of the product.
This Operating Instructions illustrates hazard alerts concerning residual dangers as
follows:
Indicates an imminently hazardous situation which, if not avoided, will result in
death or severe injury.
Indicates a potentially hazardous situation which, if not avoided, could result in
death or severe injury.
Indicates a potentially hazardous situation which, if not avoided, could result in
moderate or minor injury or in property damage.
Indicates particularly important, but not safety-relevant information.
For all work you are going to do, adhere to the applicable safety regulations. Also
observe all safety notes given in this document and forward the information to all
other users of the product.
In particular, pay attention to the following safety notes:
1.4 Safety
Personnel qualifications
Illustration of residual dangers
Danger
Warning
Caution
General safety instructions

BG 5520 BEN / A (2018-10)IMG 400 6
Mains voltage
Contact with live parts is extremely hazardous when any objects are introduced or
any liquids penetrate into the device.
Make sure that no objects enter through the louvers of the device. Keep the device
dry.
Improper use.
Improper use can damage the IMG 400.
Use the IMG 400 only as intended by the manufacturer (→Intended Use, 4).
Improper installation and operation data.
Improper installation and operation data may damage the IMG 400.
Strictly adhere to the stipulated installation and operation data.
Pfeiffer Vacuum assumes no liability and the warranty is rendered null and void if
the end-user or third parties
•disregard the information in this document
•use the product in a non-conforming manner
•make any kind of interventions (modifications, alterations etc.) on the product
•use the product with accessories not listed in the corresponding product docu-
mentation.
Danger
Caution
Caution
1.5 Liability and Warranty

BG 5520 BEN / A (2018-10)IMG400.opi 7
2 Technical Data
Weight
approx. 3 kg
Use desktop device, control panel mounted, rack
mounted
Dimensions [mm]
Temperature
Storage
Operation
-20 … +60°C
+5 … +40°C
Relative humidity max. 80% (up to 30 °C), decreasing to max.
50% (above 40 °C)
Use
indoors only, altitude max. 2000 m NN
Pollution degree
II
Degree of protection
IP 20
Manually
via 5 control buttons on the front panel
Remote control
via RS232 interface or via Profibus (optional)
Voltage
90 … 264 VAC
Frequency
47 … 63 Hz
Current consumption max. 4 A at 115 V
max. 2 A at 230 V
Power consumption
max. 300 VA
Overvoltage category
II
Protection class
1
Connection
European appliance connector IEC 320 C14
Fuse
3.15 A (in power supply)
Gauge connections per channel
Metalock Bantam UTG0187SVDEU + BNC
Compatible gauges
IMR 420, IMR 430
Gauge connections per channel
Amphenol C91B
Compatible gauges TPR 280, TPR 281
CMR 361, CMR 362, CMR 363, CMR 364,
CMR 365
Mechanical data
Environment
Operation
Mains connection
Channels 1 and 2
Channels 3 and 4

BG 5520 BEN / A (2018-10)IMG 400 8
Measuring operation
IMR 420
IMR 430
Anode potential
220 V
220 V
Reflector potential
–
205 V
Cathode potential
80 V
100 V
Emission current
0.1 mA
1)
1.6 mA
1.0 mA
2)
10.0 mA
3)
1) for increasing pressure in the range 9.99E-3 … 1E-4 hPa
for decreasing pressure in the range 9.99E-3 … 1E-5 hPa
2) for increasing pressure in the range 9.99E-5 … 1E-7 hPa
for decreasing pressure in the range 9.99E-6 … 1E-8 hPa
3) for increasing pressure in the range 9.99E-8 … 1E-11 hPa
for decreasing pressure in the range 9.99E-9 … 1E-11 hPa
Degassing
IMR 420
IMR 430
Anode potential
480 V
480 V
Reflector potential
–
205 V
Cathode potential
20 V
10 V
Emission current
90 mA
45 mA
Power
41 W
21 W
Voltage
+24 VDC ±5%
Current
0 … 1 A per channel
Total measuring range
1×10
-13
… 1.3×10
3
hPa
Emission current [mA]
Pressure range [hPa]
Ion current [A]
10
10
-11
… 10
-8
1.7×10
-12
… 1.7×10
-9
1
10
-8
… 10
-5
1.7×10
-10
… 1.7×10
-7
0.1 10-5 … 10-2 1.7×10-8 … 1.7×10-5
Emission current [mA]
Pressure range [hPa]
Ion current [A]
10
10
-11
… 10
-2
1.7×10
-12
… 1.7×10
-3
1
10
-11
… 10
-2
1.7×10
-13
… 1.7×10
-4
0.1
10
-11
… 10
-2
1.7×10
-4
… 1.7×10
-5
Emission current [mA]
Pressure range [hPa]
Ionenstrom [A]
1.6
10
-13
… 10
-4
1.6×10
-15
… 1.6×10
-6
F.S. [hPa]
Pressure range [hPa]
0.1
1×10
-5
… 1×10
-1
1
1×10
-4
… 1
10
1×10
-3
… 1×10
1
100
1×10
-2
… 1×10
2
1000
1×10
-1
… 1×10
3
5×10
-4
… 1×10
3
hPa
Gauge supply
IMR 420, IMR 430
TPR 280, TPR 281
CMR 361 … CMR 365
Measuring ranges
IMR 420 for pressure de-
pendent emission current
IMR 420 for fixed emission
current
IMR 430
CMR 361 … CMR 365
TPR 280, TPR 281

BG 5520 BEN / A (2018-10)IMG400.opi 9
Current
Channels 1 and 2
Relative to current reading
Absolute
±2%
±5 fA
Voltage
Channels 3 and 4
Relative to voltage reading
Absolute
±1%
±2 mV
The measuring speed that can be achieved with IMR gauges depend on the ion
current to be measured and the selected resolution (details →"Current Measuring
Amplifier (Amplifier)", 63).
The measuring rate of the gauges is 20 s-1 over the entire measuring range.
The filter time constants depend on the measuring rate. The actual measurement
is the average of the last n measurements. The filter settings are defined as fol-
lows:
Slow: n = 50
Fast: n = 5
Normal: n = 15
Display rate
4 s-1
Temperature drift
< 0.1 % pro °C
Unit of measurement
hPa, mbar, Pa, Torr, Micron
CMR 36x, TPR 28x
16 Bit
IMR 4x0
≤14 Bit
IMR 430 0 Ω (shorted)
≥4.25 V at the A/D converter
IMR 420 ∞Ω (interrupted)
≤0.75 V at the A/D converter
TPR 28x 3.0 kΩ ± 1%
0.202 V at the A/D converter
CMR 36x 1) 13.2 kΩ ± 1%
0.849 V at the A/D converter
1) All gauges of the same type use the same identification resistor. The valid measuring range must be
configured by the user (→"Measuring Ranges", 8).
Both gauges are identified automatically by the software. If no gauge is
found on channel 1 or 2, the controller assumes that a Bayard-Alpert
gauge is connected to channel 1. That way the system is still operable.
Name
Relay
Connection
D-Sub, 25-pin, female
Number of relays 2, can be extended to 7 with an additional inter-
face board
Response time max. 50 ms
synchronous to channels 3 and 4,
asynchronous to channels 1 and 2
Contact type
Change-over contact, floating
Load (ohmic)
max. 50 VDC, 0.5 A
Accuracy of measurement
Measuring speed
Filter time constants
Display rate, temperature drift,
unit of measurement
Resolution of the A/D converter
Gauge identification
Relay outputs

BG 5520 BEN / A (2018-10)IMG 400 10
Name
Control
Connection
D-Sub, 15-pin, male
Filter time constant
max. 1 ms
Resolution A/D converter 16 Bit
Resolution D/A converter
12 Bit
Measuring and refresh rate 20 s-1
synchronous to channels 3 and 4,
asynchronous to channels 1 and 2
Analog input voltage
0 … 10 V, unipolar
Analog output voltage
0 … 11 V, unipolar
Input impedance
min. 100 kΩ
Output impedance
max. 50 Ω
Digital inputs
TTL compatible
Name
RS232
Connection
D-Sub, 9-pin, female
Baud rate 2400, 4800, 9600, 19200, 38400, 57600,
115200
Data
7-Bit, 8-Bit, 9-Bit
Parity
odd, even, none
Stop bits
1, 2
Interface board with Profibus DP interface
Breaking capacity for voltage
30 VDC / 50 VAC
Control signals, recorder
RS232
Interface board (option)

BG 5520 BEN / A (2018-10)IMG400.opi 11
3 Installation
Visually inspect the transport packaging for signs of external damage.
Unpack the IMG 400 and put the packaging material aside.
Remove the protective film from the display.
Keep the packaging material for later use. The IMG 400 must be
stored and transported in the original packaging material only.
Examine the IMG 400 for completeness.
Visually inspect the IMG 400 for signs of damage.
Putting a product which is visibly damaged into operation can be extremely haz-
ardous. If the product is visibly damaged do not put it into operation and make sure
it is not inadvertently put into operation.
The IMG 400 can be used as follows: As a desk-top device, mounted in a control
panel, or mounted in a 19" rack. In each of these cases you must pay attention to
the following hazard alert:
Ambient temperature.
Exceeding the maximum permitted ambient temperature may damage the device.
Make sure that the maximum permitted ambient temperature is not exceeded and
that the air can flow freely through the louvers. Do not expose the device to direct
sunlight.
In order to use the IMG 400 as a desk-top device, proceed as follows:
Switch off the IMG 400 and disconnect it from mains power.
Turn the IMG 400 upside down as shown in step 4.
The holes for the legs are covered by plastic caps. Use a screw driver and
remove the plastic caps.
3.1 Unpacking
Warning
3.2 Mechanical Installation
Caution
3.2.1 Desk-Top Device

BG 5520 BEN / A (2018-10)IMG 400 12
Mount the four supplied feet to the bottom plate.
If required, fold out the two front feet.
Turn the IMG 400 back to normal orientation and place it on the required
location.
In order to mount the device in a control panel, the following cutout is required
(dimensions in [mm]):
Insert the IMG 400 into the cutout.
Fasten the device with four M3 screws
In order to reduce the strain on the front panel it is recommended
to support the bottom of the device.
3.2.2 Installation in a Control
Panel

BG 5520 BEN / A (2018-10)IMG400.opi 13
The IM 400 is designed for installation into a rack chassis adapter according to
DIN 41 494 (19", 3 HU). For this purpose, 4 collar screws and 4 plastic sleeves are
supplied with the device.
Protection class of the rack.
If the product is installed in a rack, it is likely to lower the protection class of the
rack (protection from foreign bodies and water) e.g. according to the EN 60204-1
regulations for switching cabinets.
Take appropriate measures to restore the required protection class of the rack.
In order to reduce the strain on the front panel it is recommended to
equip the rack chassis adapter with a guide rail.
For safe and easy installation of heavy rack chassis adapters, it is re-
commended to equip the rack frame with slide rails.
Fasten the rack chassis adapter in the rack.
Insert the IMG 400 into the rack chassis adapter.
Fasten the IMG 400 with the supplied collar screws and plastic sleeves to
the rack chassis adapter.
3.2.3 Rack Installation
Warning

BG 5520 BEN / A (2018-10)IMG 400 14
A RELAY connection
B
CONTROL connection
C
RS232 connection
D
Switch for program transfer mode
E
Connection for IMR measuring signal, channel 1
F
Fastening and ground screws for heat sink
G
Connection for IMR control, channel 1
H
Mains switch
I
Ground screw
J
Connection for IMR control, channel 2
K
Mains connection
L
Connection for IMR measuring signal, channel 2
M
Extension slot
N
Connection for CMR and TPR, channel 3
O
Connection for CMR and TPR, channel 4
Screw for internal protective conductor.
The internal protective conductor is connected to the casing with a screw. In case
of a failure, a device whose protective conductor is not connected to the casing
may be lethal.
Do not turn or loosen this screw.
Ground connection of heat sink.
The heat sink is connected to the casing with two screws. In case of a failure, a
device whose heat sink is not connected to the casing may be lethal.
Do not turn or loosen these screws.
The configuration of the available connections is described in the following
sections.
3.3 Connecting
3.3.1 Back Side of the Device
Warning
Warning

BG 5520 BEN / A (2018-10)IMG400.opi 15
The mains connection (→pos. K, 14) is designed for a mains cable which con-
tains a European appliance connector on the device side.
A mains cable is supplied with the device. If the plug is not compatible with your
wall socket, you have to get a suitable mains cable:
•Three-conductor cable with protective ground
•Conductor cross-section3 × 1.5 mm2or larger
Mains power.
Improperly grounded devices can be extremely dangerous in the event of a fault.
Use three-wire mains or extension cables with protective ground only. Plug the
mains cable into wall sockets with protective ground only.
Connect the European appliance connector of the mains cord with the
mains connection of the device.
Connect the plug of the mains cable with the wall socket.
If the device is installed in a switching cabinet, the mains power can be
supplied via a switchable central power distributor.
The ground screws (→pos. I, 14) can be used to connect the IMG 400 with the
protective ground of the pumping station.
If required: Connect the protective ground of the pumping station with the
ground screw. Use a protective conductor.
The metal flanges of the IMR 420 and IMR 430 gauges are connected to the
ground via the measuring lines inside of the IMG 400.
The heat sink is connected to the casing with two ground screws (→pos. F, 14).
Do not turn or loosen these screws
3.3.2 Mains Connection
Danger
3.3.3 Ground
Protective conductor
Heat sink

BG 5520 BEN / A (2018-10)IMG 400 16
The CH1 and CH2 connections are used to connect IMR 420/430 gauges.
A 7-pin appliance socket (type Metalock Bantam) is available for each channel
(→pos. G and J, 14).
Pin assignment:
1
Filament
5
ID res (short 1)
2
Cathode
6
ID res (short 2)
3
Anode
7
Protective conductor
4
Reflector (Extractor)
Hazardous voltage.
As soon as the emission is switched on, both appliance plugs carry hazardous
levels of voltage, even if only one measuring system is connected. Touching one of
these plugs may cause serious injuries.
The device must be switched off before any work is performed to the gauge or the
measuring line. After switching off, wait approx. 15 seconds before starting the
work.
The measuring signals, i.e. the ion currents, of each gauge are transferred via a
coaxial cable (→pos. E and L, 14).
Pin assignment:
Inner conductor: Ion current
Outer conductor: Shielding
Hazardous voltage.
During operation of the IMR 420 and IMR 430 gauges, a hazardous voltage may
be present at the measuring signal connection (→pos. E and L, 14) in case of a
failure.
Mount the touch protection at the measuring signal connection. The touch protec-
tion is included in delivery of the measuring line.
The CH3 and CH4 connections are used to connect the CMR and TPR gauges.
A 6-pin Amphenol C91B appliance socket is available for each
channel (→pos. N and O, 14).
Improper gauge.
Gauges which are not designed for use with the IMG 400 may damage the device.
Operate the IMG 400 with proper gauges only (→7).
3.3.4 CH1 and CH2
Control signals
Warning
Measuring signals
Danger
3.3.5 CH3 and CH4
Caution

BG 5520 BEN / A (2018-10)IMG400.opi 17
Multiple connection.
Only one gauge may be connected to each of the channels. Otherwise the con-
nected gauges will be damaged.
Never connect more than one gauge per channel.
CH3: Connect the gauge with the CH3 connection. Use a shielded 1:1
cable.
CH4: Connect the gauge with the CH4 connection. Use a shielded 1:1
cable.
The switching functions and the error monitoring system influence the states of
several relays inside of the IMG 400. The RELAY connection (→pos. A, 14)
allows to utilize the relay contacts for switching purposes. The relay contacts are
potential-free (floating).
Pin assignment:
1
GND
16
Emission off (NC)
2
GND
17
Emission common (COM)
3 Channel 2 error (NC) 18 Emission on (NO)
4
Trigger 1 off (NC)
19
Degas off (NC)
5
Trigger 1 common (COM)
20
Degas common (COM)
6
Trigger 1 on (NO)
21
Degas on (NO)
7
GND
22
Channel 1 error (NC)
8
Trigger 2 off (NC)
23
Channel 1 common (COM)
9
Trigger 2 common (COM)
24
Channel 1 ready (NO)
10
Trigger 2 on (NO)
25
+24 VDC, 200 mA
11
Channel 1 selected (NC)
Meets the requirements of a
ground protective extra low volt-
age (PELV).
12
Channel 1 / 2 common (COM)
13
Channel 2 selected (NO)
14
Channel 2 ready (NO)
15
Channel 2 common (COM)
COM common
NC normally closed
NO normally open
Pin 25 is used for supplying relays with a higher breaking capacity. The
supply contact is protected at 200 mA.
Hazardous voltage.
Voltages above 60 VDC or 30 VAC pose a shock hazard.
The RELAY connection may be used for switching voltages of max. 60 VDC or
30 VAC only. These voltages must meet the requirements of a ground protective
extra low voltage (PELV).
Connect the peripheral components with the RELAY connection. Use a
shielded cable.
Caution
3.3.6 RELAY
Warning

BG 5520 BEN / A (2018-10)IMG 400 18
The CONTROL connection (→pos. B, 14) contains the following signal pins:
•Analog inputs for remote control of the emission
•Digital inputs for switching the emission
•Linear and logarithmic recorder output
Pin assignment:
1
Dig. Remote Channel 1 GND
9
Dig. Remote Channel 1
2
Dig. Remote Channel 2 GND
10
Dig. Remote Channel 2
3
GND
11
GND
4
GND
12
Anal. Remote Channel 1
5
Anal. Remote Channel 1 GND
13
Anal. Remote Channel 2
6
Anal. Remote Channel 2 GND
14
Recorder 1 Output
7
Recorder 1 GND
15
Recorder 2 Output
8
Recorder 2 GND
Connect the peripheral components with the CONTROL connection. Use a
shielded cable.
The RS232 serial interface (→pos. c, 14) allows remote control of the device via
a computer or a terminal. In addition, the interface may be used for firmware up-
dates (→"Program Transfer Mode ", 57).
Pin assignment:
1
DCD, +5 V external supply,
5
GND
max. 300 mA
6
DSR
2
TxD
7
n.c. (not connected)
3
RxD
8
CTS
4
n.c. (not connected)
9
RI
Connect the serial interface of the computer with the RS232 connection.
Use a shielded cable.
Use a serial extension cable with a 9-pin plug and a 9-pin socket. The
cable must not contain any crossed wires.
An interface board in the extension slot (→pos. M, 14) can be used to extend
the device with 5 more relays and one more interface.
Usable interface board: Interface board with Profibus DP interface
3.3.7 CONTROL
3.3.8 RS232
3.3.9 Extension Slot (Option)

BG 5520 BEN / A (2018-10)IMG400.opi 19
4 Operation
A
Channel
G
Status display (black letters)
B
Gauge type
H
Trigger relay status
C
Status row
I
Pressure unit
D
Menu name
J
Bar graph measurement display
E
Digital measurement display
K
Control buttons
F
Status display (white letters)
The most important system states are always displayed in the top row (pos. C) no
matter which menu is selected.
The left part of the status row displays the menu name (pos. D) in black letters on a
white background.
The right part of the status row (pos. F) displays the following states (from left to
right) in white letters on a black background:
Field
Display
Significance
1
EMI
Emission is switched on
2
OFS
Offset correction for capacitive gauge is activated
3
COR
Gas type correction is programmed
4 USR Standard parameter settings have been changed by the
user
These fields remain empty if the related state does not apply.
4.1 Front Panel
4.1.1 Display
Status row

BG 5520 BEN / A (2018-10)IMG 400 20
The right position of the status row (pos. G) displays the following states in black
letters on a white background. The priority of the display corresponds with the
listed order.
Display
Significance
Error xyz Error no. xyz has been issued
•Flashing: Error has not yet been acknowledged
•Static: Error has been acknowledged via the «Error» submenu
(
→
"Detail Groups",

29)
Test
Hardware test is being performed (
→
"Test Mode",

59)
Degas
Gauge is being degassed (flashing)
Offset
Offset or zero values are being determined (flashing)
LoadCor A charge correction is performed for the ion gauge amplifier (only in
highly sensitive ranges)
EMO Emergency-off button has been actuated (→"Emergency-Off
Action",

26)
Profi Device is controlled via Profibus (→"Device Control (Control)",
39)
IF400x Device is controlled via RS232 of the optional interface board
(
→
"Device Control (Control)",

39)
RS232 Device is controlled via RS232 and the IMG 400 protocol (→"Device
Control (Control)",

39)
Remote Device is controlled via discrete remote control inputs (→"Device
Control (Control)",

39)
(nothing)
None of the conditions mentioned above applies
The states of the two trigger relays are displayed to the right of the display (pos. H).
If the triangle above the number is illuminated, the relay is off or the pressure is
above the lower threshold value. If the triangle below the number is illuminated, the
relay is on or the pressure is below the upper threshold (→Fig. Hysteresis, 36).
These states are only displayed if trigger relays have been selected for this
(→"Configuring Switching Functions", 37).
The current measurement is displayed digitally (pos. E) and as a bar graph
(pos. J).
In sensitive measuring ranges, interference (external mechanical or
electrical effects) may temporarily cause the measurement of a negative
input current. In these cases, the last valid pressure value will be dis-
played, preceded by the less-than sign "ur".
•Digital display: The measurement is displayed as a three-digit floating point
number in scientific notation by default. The unit of measurement is displayed
to the right: hPa, mbar, Torr, Pa, or Micron.
•Bar graph: The bar graph illustrates the increase or decrease of the measure-
ments. The related pressure range limits can be seen at the left (lower limit)
and right (upper limit) of the bar graph. Markings highlight the boundaries bet-
ween decades of pressure. The unit of measurement is always identical with
the digital measurement display.
The digital display and the bar graph can be customized (→"Display, Bar graph
(Disp.Bar)", 42).
Trigger relay status
Measurement Display