Large Display Temperature Meters
Instruction Manual
16
Disassembling the Meter
To perform the steps described above, it is necessary to partially disassemble the
meter. Main PCB may remain attached to enclosure’s base even during conduit
hub installation if proper precautions are taken.
Disassembling the PD755
1. Loosen the four screws that hold enclosure’s cover and remove the cover.
2. Remove the four mounting screws holding the Display PCB (see Figure 28,
page 60).
3. Move Display PCB out of the way. Ribbon cable to Display PCB may be
removed during meter installation.
Do not remove standoffs from Main
PCB
. Main PCB is secured to enclosure’s base with four mounting screws.
4. Change voltage selection as required; this is described on page 20. Set
configuration jumpers; connect power and signal wires.
5. Reassemble Display PCB prior to applying power.
6. Program meter prior to installing enclosure’s cover.
7. Install lockout jumper to prevent accidental changes to programmed settings.
Disassembling the PD756
!
When servicing the PD756 in a hazardous area, all appropriate
hazardous area procedures must be followed.
1. Remove enclosure’s cover.
2. Loosen the two mounting screws on the right side of the Display PCB (see
Figure 29 on page 60). It is not necessary to remove the faceplate.
3. Remove the two mounting screws on the left side of the Display PCB.
4. Slide the Display PCB out from under the screws. Ribbon cable to Display
PCB may be removed during meter installation.
Do not remove standoffs
from Main PCB
. Main PCB is secured to enclosure’s base with four
mounting screws.
5. Change voltage selection as required, described on page 20. Set
configuration jumpers; connect power and signal wires.
6. Reassemble the Display PCB prior to applying power.
7. To program meter using front panel buttons leave cover off until meter
programming is complete.
8. Install lockout jumper to prevent accidental changes to programmed settings.
