Christ Elektronik CAM 100 User manual

Operation manual
E461501 Rev 01
Christ-Elektronik GmbH • Alpenstrasse 34 • -87700 Memmingen
Tel. [phone] - 0 • Fax [phone] - 99
Operation manual CAM 100
Digital panel meter for Voltage / Current DC
About this manual:
Read this manual carefully for safety instructions and operating guidance before installation!

1 Description
1.1 General
With the digital panel meter CAM 100 almost all similar DC signals are measurable. The desired measuring range (200 mV,
2V, 20V, 200 V, standard signals: 0 ... 10 V and 0 (4) ... 20 mA), including decimal place, scale themselves by solder pads
under the clamps to find. Similar input signals within the range of - 1999... + 1999 can be scaled by means of resistance at
the clamps at will. Despite the small dimensions the LED display can be read off even from larger distance well.
1.2 Safety instructions
This equipment is built and according to quality standards examined in accordance with European guidelines. It left the work
in safety-relevant perfect condition. The references and warning notes contained in this operating instructions must be con-
sidered around a safe enterprise to ensure. Without impairment of its working reliability the equipment can be operated
within the certified site conditions. See chapter 3. This equipment may be taken only by a specialist in enterprise, which is
familiar with the associated dangers and/or the relevant regulations.
1.3 Maintenance
All repairs of the device may only be carried out by a specialist workshop. In case it is inevitable to carry out repairs on the
opened device which is still supply voltage this may only be effected by trained specialist who knows about the dangers usu-
ally related to any such procedure. In case of misuse or wrong operation of the device we do not assume any liability for any
damages that might occur.
1.4 Mounting
The equipment is to be inserted from the front into the cutout planned for it (according to DIN 43,700). Dimensions of the
cutout: 45 x 22.2 [mm]. The attachment takes place with the help of enclosed fastening parts. The tightening screws are to
be tightened mutually, until the equipment sticks. During the placement of the equipment is the radiant heat of neighbouring
devices to consider (consider permissible ambient temperature!). The electrical connection is to be made according to appro-
priate regulations (e.g. VDE 0100). Supply voltage is indicated and to the clamps 5 and 6 is put on on the vehicle identifica-
tion plate.
2. Operation
2.1 Starting
Standard input & display ranges at the CAM 100 can be selected through solder pads as shown in table 1. With the resistor
Rs any display range can be realised for voltage and current measurements. Also the decimal point is selected through a sol-
der pad. The gain can be changed about ± 20% through the gain potentiometer „V“. The offset range is ± 500 digits related to
the input signal of 0 VDC or 0 mA. It can be changed by potentiometer „Np“.
2.2 Adjustment of measuring U/I
1. Standard input & display ranges can be selected through solder pads (see table 1) or calculate resistor Rs appropriate
table 2. Close solder pads (see pict. 2) and connect Rs at pin 3 / 4 at the terminal block (see pict. 1)
2. Apply the voltage or current for span start to terminal block pin 1 / 2.
3. Bring the display to the required value for span start using the zero potentiometer “NP” (see pict. 1).
4. Apply the voltage or current for span end to the input terminal.
5. Bring the display to the required value for span end using the gain potentiometer „V“ (see pict. 1).
6. Repeat step 2 to 5 until the display corresponds to the required measuring range.

2.3 Rear view and solder pads
Picture 1: Connecting diagram Picture 2: Solder Pads
1 2 3 4 5 6
Voltage / Current Supply voltage
+ - R
S
+ -
V / mA 5 / 12 / 24 V
Gain Potentio-
meter „V“
Zero
Potentio-
meter “NP!
Picture 3: Display-ranges
8
7
6
5
4
3
2
1
Solder Pads
Solder Side
Table 1:
Selection of measuring ranges:
Input Display
range
min.
Display
range
max.
Solder Pads
closed
Current variable variable 1 and Rs
0 ... 20 mA 155 240 2
0 ... 20 mA 500 760 3
0 ... 20 mA 760 1140 4
0 ... 20 mA 1140 1710 5
0 ... 20 mA 1710 1999 2 u.8
4 ... 20 mA 400 605 3
4 ... 20 mA 605 910 4
4 ... 20 mA 910 1370 5
4 ... 20 mA 1370 1999 2 u. 8
Voltage variable variable only Rs
0 ... ±200 V ±1600 ±1999 7
0 ... ±20 V ±1600 ±1999 6
0 ... ±2 V ±1600 ±1999 all open
1)
0 ... ±200 mV ±1600 ±1999 8
1) Preset delivery configuration.
Table 2:
Formula to calculate the scaling resistor Rs:
Voltage measurement:
[ ]
[ ]
0,001
digitdisplayrequired
Vageinput volt 1
kRs − =Ω






Example 1: Input voltage 0 ... 30 V, required
display 20,0 ... 120,0:
[ ]
Rs k 1
30
1000 0,001
Ω = − = 34,48 kΩ≈34,8 kΩ
Current measurement:
[ ]
[
]
[ ]
Rs required display digit
input current mA
Ω =
Example 2: Input current 0 ... 20 mA, required
display -1,80 ... 14,20:
[ ]
Rs 1600
20
Ω = = 80 Ω≈80,6 Ω
DP 1
DP 0
DP 2
DP 1
DP 3
DP 3
DP 2
DP 0

3 Technical data
Christ-Elektronik GmbH
Alpenstraße 34
87700 Memmingen
Telefon [phone] – 0
Fax [phone] – 99
eMail: [email protected]
Internet: http://www.christ-elektronik.de
Amtsgericht
Memmingen
HRB 9102
Subject to change!
Display
Display 7 – Segment display, 8 mm LED red
Display range ±1999 digits
Decimal point via jumper
Measurement range Display „1“ at overrange or sensor break
Display „-1“ at underrange
Measurement functions
Measurement range attitude via solder bridge
Meas. method Dual Slope
Meas. rate approx. 2,5 / sec.
Response time < 2 sec. (at 100% Stepp)
Input signals Voltage, Current (DC)
Input range 0 ... 10 V
DC
, 0 (4) ... 20mA
±0,2 / ±2 / ±20 / ±200 V / mA
Accuracy: ≤±1 Digit ±0,15 % of display value
Temp. effect: ≤±0,08 digit / K (reference +25°C)
Gain adjustment: max. ±20 % „V“
Offset adjustment: max. ±500 Digit „NP“
Supply voltage
Supply volltage 5V
DC
4,5-5,5V
DC
, 12V
DC
12-13,2V
DC
, 24V
DC
22,3-26,4 V
DC
,
galvanivally separated, ripple max. 100 mV
SS,
Protection Protection against pole reversal
Power consumption max. 50 mA
EMC References According to European Directive 89/336/EWG „Electromagnetic Compatibility“
and 73/23/EWG “Low Voltage Directive”. Meets with EN 50081, EN 50082 and
EN 61010 for unrestricted industrial use
Dimensions
Dimension (W x H x L) appr. 48 x 24 x 78 [mm]
Recommended panel cut-our 45 x 22,2 [mm]
Mounting depth appr. 72 mm
Material Glass-fibre reinforced Noryl, hardly inflammable,
removable front frame
Weight appr. 50 g
Panel thickness max. 5mm
Attachment via 2 attachment elements
Environment
Ambient temperature 0 ... 50 °C, no dew allowed
Protection Front panel IP 50, Terminal block IP 20 (DIN 40050, IEC 144)
Protective class II (prot. isolation)
Connections
Interconnection technology Terminal screws with wire protection for max. 1.5 mm
2