OPTIONS CARD REMOVAL & INSTALLATION
Meter options are installed at the factory. It is
NOT
necessary to
remove the circuit boards from the case to disable the relays’ fail-safe
operation. The fail-safe jumper is located on the Display Board, see
Figure 14 on page 29. Refer to the following instructions and
illustrations to remove the snap-off cover and the circuit boards from
the case.
Disconnect power prior to performing
the following operations.
The meter's snap-off cover is held in place by 6 latches that snap into
notches on the snap-off cover. To remove the snap-off cover from the
meter, grasp it firmly on its top and bottom edges and pull it forward.
The latch plate remains around the meter's case.
To remove the circuit boards from the case:
1. Unscrew the retaining screws holding the circuit boards to the case.
2. Remove the screw terminal connectors at the rear of the meter.
3. Push the boards through the case by applying pressure to the
circuit boards at the rear of the meter. Apply pressure evenly to
both boards.
4. Do not apply pressure to the vertical display board.
Figure 17: Front Cover Removal
5. To avoid electric shock, re-install the circuit boards in the case
prior to applying power.
Model PD690 Universal Process Meter
Instruction Manual
32
Latch
Snap-off Cover
Latch Plate
Notch
Retaining Screws and Washers
All programming and calibrating can be performed
with the circuit boards installed in the case.
