GMW DIGEM 96 x 48 B5 User manual

Operating Instructions
DIGEM 96 x 48 B5
A1385 Digital, Panel Mount
Measuring Instrument
2786688611
09/03

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Contents Page
1 Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Terminal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 External Control Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Basic Instrument Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.1 Display Brightness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.2 Measuring Range Matching for 0 – 20 mA and 4 – 20 mA . . . . . . . 10
5.3 Measuring Range Matching for Pt100 Temperature Sensor . . . . . . . 10
5.4 Measuring Range Matching with HCAL (hardware calibration). . . . . . 10
5.5 Measuring Range Matching with PCAL (software calibration) . . . . . . 11
5.6 Relay Switching Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.7 Limit Value Switching Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.8 Setting Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.9 Securing the Selected Limit Values . . . . . . . . . . . . . . . . . . . . . . . . . 12
6 Setting the Limit Values During Operation . . . . . . . . . . . . . . . . . 13
7 Mean Value Generation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8 Technical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Notes andWarnings
This instrument has left the factory in flawless technical safety condition. In
order to maintain this condition, as well as to assure hazard-free operation,
the user must observe all notes and warnings which are contained within the
operating instructions. If, due to damage, it can no longer be assumed that
hazard-free operation is possible, the instrument must be removed from ser-

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vice. It must be assumed that the instrument can no longer be safely oper-
ated if damage is visibly apparent. Before placing the measuring instrument
into service, make sure that it has been properly equipped for the required
measuring task (correct power supply, inputs and outputs). The instrument
version and any possible options are identified on the serial plate. If covers are
opened or parts are removed from the instrument, voltage conducting parts
may be exposed. Balancing, maintenance and repair of live, open instruments
may only be performed by trained personnel who are familiar with the dangers
involved.
1 Applications
The easy to program DIGEM 96 x 48 B5 digital indicator is a high precision
panel mount instrument with adjustable display range. The display range can
even be matched to the 4 to 20 mA and 0 to 20 mA measuring ranges after it
has been installed without the use of a calibrator. The measuring instrument is
thus suited for applications, for which on-site adjustments to the display
range are frequently required.
The instrument can optionally be provided with two limit values. Limit value
violations are signalled optically by means of two LEDs at the right-hand side
of the digital display. Furthermore, each limit value is assigned to a relay with a
changeover contact.
The measurement input is of modular design. It can be used for the following
measuring tasks depending upon the utilized measuring module:
• Direct current, 0 ... 20 mA and 4 ... 20 mA
• Direct current, 4 ... 20 mA, with power supply for 24 V / 20 mA 2-wire
measuring transducer
•Temperature measurement with Pt 100
• Direct voltage from ± 60 mV to ± 200 V
• Direct current from ± 2 mA to ± 200 mA
• Alternating voltage from 0.2 V to 700 V
• Alternating current from 2 mA to 200 mA
2 Mounting
First set the measuring instrument into the panel cutout from the front without
the fastening tabs. The fastening tabs are then inserted from the rear into the
slots provided for this purpose at the side panels, and are squeezed against
the control panel.

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Attention
!
If several instruments are mounted at maximum component density,
make sure that the maximum operating temperature of 50˚ C is not
exceeded, even with internal warming.
Dimensional Drawing
96 48
90.5 42.5
37
126
119
5
1
Installation Depth with Relay Outputs
138
A
ll dimensions in mm
Panel Cutout 92 +0.8 x 45 +0.6
19.9 1
A1
A2
48
96

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3Terminal Connections
0 V / GND
Cable Resistance
Compensation
max. 2 Ω
Lock
–
+
+
–
~~
~~
4-Wire Connection 3-wire 2-wire
Changeover
Normally Closed
Normally Closed Contact
Relay 2Relay
1
24 V AC / DC
+–
~~
230 V AC / 50 Hz
Offset Adjustment
Upper Range Value
Input
Measurement
Normally Open Contact
Changeover Contact
Hold
Reset
Normally Open
30 29 28 26 25 24
1 2 3 4 5 6 8 9 10 11 13 14 15
1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6

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3.1 External Control Inputs
Attention
!
Terminals 8, 9, 10 and 11 are electrically connected to the measure-
ment input. External switching elements must be electrically isolated
from earth as required by measurement input potential.
Reset and DeviceTest
The entire display is darkened if
a connection is established
between terminals 8 and 11.
Attention : This connection
causes resetting of the
microprocessor.
A segment test is performed for
approx. 1 second after this connection has been interrupted. The instrument
returns to normal operation after the segment test has been completed.
Save DisplayValue to Memory (Hold)
The currently displayed value is saved to memory if a connection is estab-
lished between terminals 9 and 11 during normal display operation. This has
no effect on the measuring cycle.
Program Protection (Lock)
Selected parameters are protected against possible change if a connection is
established between terminals 10 and 11.
12345689
10 11 14 15
13
Lock
Hold
Reset

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4 Basic Instrument Settings
Parameter Function Setting Range
bri Display brightness 0 ... 7
0 – 20 mA Measuring range selection
AA Lower display range value
AE Upper display range value
4 – 20 mA Measuring range selection
AA Lower display range value
AE Upper display range value
Pt100 Measuring range selection
C / F Display in degrees Celsius or Fahrenheit C / F
2-4L / 3L 2/4-wire of 3-wire connection 2-4L / 3L
HCA Hardware calibration
ZEro Lower display range value –1999 ... 9999
SPAn Upper display range value –1999 ... 9999
PCA Software calibration
OFSt Offset adjustment –1999 ... 9999
SCAL Measurement value multiplier –1.999 ... 9.999
dP Decimal point 0.000 / 00.00 /
000.0
HiLo
(only for
instruments
with limit values)
Relay switching performance LoLo,
LoHi,
HiHi,
HiLo
Hi-1 Switching point for limit value 1 –1999 ... 9999
Lo-2 Switching point for limit value 2 –1999 ... 9999
HYSt Hysteresis 0 ... 100
ULoc Secure limit values Uloc, Loc

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5 Programming
The following parameters can be set in the order in which they appear below:
• LED display brightness
• Measuring range selection
• Decimal point
The following additional parameters can also be set for instruments with limit
values:
• Relay switching performance
• Switching point values
• Limit value hysteresis
Enabling Programming
In order to enable programming, program protection (Lock) must be released,
i.e. contact between terminals 10 and 11 must be interrupted. If programming
has not been enabled, Loc is displayed when the programming mode is
accessed.
Programming Description
The measuring instruments are programmed at the factory as indicated on
the serial plate. If programming has been enabled, the basic settings can be
changed with the three keys at the front panel.

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Programming Overview for Basic Instrument Settings
P▲
▼▲
P
P▲
/F
/3L
Observe selected measuring module.
P
P
P
P
P
P
P
P
▼▲
▼▲
Selection
see chapter 5.6
Selection
see chapter 5.9

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Press the P and ⇑ keys simultaneously in order to enter the programming
mode. The parameter designation and the corresponding value blink alter-
nately. The longer the arrow key is pressed and held, the faster the value is
changed. The currently displayed value is not saved until the next parameter
is selected by pressing the P key.
Range matching for 0 / 4 – 20 mA and for Pt100 sensors depends upon the measuring
module,and may only be selected if the corresponding measuring module is utilized
(see specifications on the serial plate).
5.1 Display Brightness
Display brightness can be adjusted with the “bri” parameter. Brightness can
be set within a range of 0 to 7. It is set to a default value of 5 at the factory.
5.2 Measuring Range Matching for 0 – 20 mA and 4 – 20 mA
The parameters AA and AE allow for the entry of a display range without any
additional calibration.
5.3 Measuring Range Matching for Pt100Temperature Sensor
This selection allows for the display of temperatures in either ˚C or ˚F, and
determines whether 2/4-wire or 3-wire connection is used for the temperature
sensor.
5.4 Measuring Range Matching with HCAL (hardware calibration)
This selection allows for adjustment through the use of a calibrator. The input
quantities for the lower and upper measuring range values must be applied to
the measuring instrument’s input during adjustment.
Apply the value which corresponds to the lower measuring range value to the
measurement input. Select the ZErO parameter and enter the value which
corresponds to the lower measuring range value.
Apply the value which corresponds to the upper measuring range value to the
measurement input. Select the SPAn parameter and enter the value which
corresponds to the upper measuring range value.
Save the selected values to memory with the P key. The measuring instru-
ment automatically calculates offset and multiplier, and saves these values to
memory.
Attention: If values which lie outside of the setting range result from the calcu-
lation of offset or multiplier, the message ErrP appears and the incorrect entry
blinks (e.g. SPAn).