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Trip Amplifier 1/209
Hardware Description
3.7
Changing Current Input/Voltage Input
These changes should only be carried out in the laboratory since recalibration is required.
For jumper locations see section "Device Layout".
Desoldering should only be carried out using a desoldering wick. Remove and replace
jumpers as shown in the following table:
Input
1
2
3
4
The modified input is calibrated afterwards. You can do this using the handheld
commmunicator or a PC (see section "Calibration").
3.8
Maintenance
The devices of the 1/209 series do not employ mechanical components which are
exposed to wear and tear other than the front push buttons and relays. The circuits are
well selected only incorporating high quality parts.
Therefore no regular maintenance is required as long as the maximum operating
conditions are observed. Due to the excellent long-term stability calibration of zero and
span need only be checked once a year. The relay life is given in technical data in
section 2 "Technical Data".
3.9
Service Instructions
In case of dubious measuring results please check all external connections carefully. It is
also good practice to check that the desired program has actually been stored in
EEPROM. A TAG number can be stored for identification purposes (also see section
"Commissioning"). If there is no doubt about the fault lying with the device, it is seldom
possible to repair the unit on site. Local analysis should be restricted to a check of the
fuses.
Each fuse is tagged with its nominal value. Fuses must always be replaced by their
equivalents. Fuse positions may be taken from section "Technical Data" figure device
layout.
Fuse
F1
Other faults require laboratory tests. Circuit diagrams can be made available at request.
Repairs can be carried out by our service department quickly and efficiently if units are
returned to the factory. Spares help to maintain production in such cases.
70
0/4 mA ... 20 mA
X101
X201
X301
X401
Value
0.630 A
0/1 V ... 5 V
0/2 V ... 10 V
X102
X202
X302
X402
Function
Power supply
X103
X203
X303
X403
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