Maintaining the product 21
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➣
Changing the rechargeable battery:
✓ The measuring instrument must not be connected to a mains socket via
the mains unit. The measuring instrument must be switched off.
1 Place the measuring instrument on its front.
2 Undo the screws with a cross-head
screwdriver and remove service lid.
3 Open the battery lock by pressing the button
and pushing in the direction of the arrow.
4 Remove the rechargeable battery and insert
new rechargeable battery.
5 Close the battery lock by pressing the
button and pushing against the direction of
the arrow until the battery engages.
6 Replace service lid and fasten with screws.
Measuring cells
Used measuring cells must be disposed of as special waste!
➣
Changing the measuring cells (327 CO, 327 O2, 327-1):
A slot bridge (0192 1552) must be inserted in slots which do not have a
measuring cell. Used measuring cells must be disposed of as special waste!
✓ The measuring instrument must be switched off.
1 Place the measuring instrument on its front, facia.
2 Loosen the screws with a cross-head screwdriver and remove service lid.
3 Pull hose connections from the faulty measuring cell.
4 Remove the faulty measuring cell/bridge from the slot.
CO measuring cell only: Remove the shorting
jumper.
Do not remove shorting jumpers of the new
measuring cells until immediately before installation.
Do not leave the measuring cells without a shorting
jumper for longer than 15 minutes.
5 Insert a new measuring cell in the slot.
6 Attach hose connections to the measuring cell.
7 Replace service lid and fasten with screws.
8 Continue with
calibration of O
2
measuring cell
and/or
input of cell
coefficients for CO measuring cell.
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