To modify CD800 and CD830 control units for automatic resetting:
Remove diodes from control unit printed circuit boards as follows:
a. For automatic resetting of warning circuitry only (retaining manual alarm circuitry resetting):
Clip leads of diode CR3 and remove diode.
b. For automatic resetting of alarm circuitry only (retaining manual warning circuitry resetting):
Clip leads of diode CR2 and remove diode.
c. For automatic resetting of both warning and alarm circuitry: Clip leads of diodes CR2 and CR3
and remove diodes.
If both warning and alarm functions are modified for automatic resetting:
CD830 only: Grasp RESET lens with fingers and withdraw from socket. Replace with unlabeled red
lens 0104-6286. (Unlabeled red lens is standard for CD800W control unit front panels.) If manual
resetting is retained for
either warning or alarm circuitry, do not replace the CID830 RESET lens.
INSTALLATION OF EXTERNAL ACCESSORY DEVICES
The CD800/830 module provides terminals for accessory devices such as chart recorders, remote
alarms, relays, and switches. Instructions for installation of these accessories are contained in the
INSTALLATION OF RECORDER. Connect recorder as follows: Individual control modules are
compatible with 0-100 mV recorders having an input impedance greater than 100 ohms.
NOTE: A multipoint recorder used to scan outputs from several modules must have a non-shorting
commutator (selector switch) to avoid momentary connecting of two module recorder signal
1. Connect recorder to REC + and - terminals on module terminal panel (CD800P: to terminals TB-2, 4(-)
and 5 (+).
2. Press and hold down TEST pushbutton. If necessary, adjust RANGE control R22 for full-scale meter
3. Observe recorder response at full-scale meter reading at control module.