7MF4232
Operating Instructions
25
C79000-B5676-C92-01
Calibrate start of scale and full scale
If the output current is not to be set but freely adjusted:
- Connect a DC meter to the output circuit or the test sockets (see Figure 2.4, page 17)
!
Warning
D
For intrinsic safe current circuits only certified current meters are permitted.
D
It is forbidden to screw off the transmitter cover when working in hazardous location and
using transmitters conforming to protection type ”Flame--proof enclosure” (explosion--
proof).
Measuring at test sockets:
- Clean the transmitter to prevent the ingress of dirt
- Open the housing cover of the terminal side
- Remove the analogue indicator (if fitted)
- Connect DC meter
D
Start of scale
- Apply an absolute pressure corresponding to the start of scale to the transmitter
- Set the output current for start of scale using the
and
keys
D
Full scale
- Apply an absolute pressure corresponding to the full scale to the transmitter
- Set the output current for full scale using the
M
key
and
the
key or the
M
key
and
the
key.
Always press the
M
key first, hold it, and press either the
key or the
key.
On completion of calibration
- Replace the analogue indicator (if applicable)
- Screw housing cover back on
- Replace protective cover and tighten both screws
