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OMEGA Model CYD201/CYD208 User’s Manual
Service 5-1
CHAPTER 5
SERVICE
5.0 GENERAL
This chapter covers Model CYD201/CYD208 maintenance: Model CYD201
Rear Panel Connections (Paragraph 5.1), Model CYD208 Rear Panel
Connections (Paragraph 5.2), Error Code Troubleshooting (Paragraph 5.3),
General Maintenance (Paragraph 5.4), Fuse Replacement (Paragraph 5.5),
Line Voltage Selection (Paragraph 5.6), Calibration (Paragraph 5.7), and
Serial Interface Cable and Adapters (Paragraph 5.8).
5.1 MODEL CYD201 REAR PANEL CONNECTIONS
Figure 5-1. Model CYD201 Rear Panel Connections
J1 INPUT 1
: Accepts circular 4-pin connector temperature sensor (201-MC).
J2 SERIAL I/O
: RJ-11 jack for serial remote communications to a host
computer. May require accessories CYD200-J10 (RJ-11 phone cord) and
CYD200-D (RJ-11 to DB-25 adapter).
J3 ALARM
: Relay responds to alarm setpoints and can trigger another
device. Contact 1 is normally open, contact 2 is normally closed.
Switch
: Not used.
LATCH
switch: When on (position 1), turns alarm on but not off (latched) as
indicated by temperature change. When off (position 0), turns alarm off or
on (unlatched).
SET
switch: Used in setting alarm setpoints and recalibration.
CAL ENABLE
(Calibration Enable) pushbutton: Used during A/D Converter
Calibration. See Paragraph 5.7.2.
I ADJ
(Current Adjust) trim potentiometer: Used during Current Source
Calibration. See Paragraph 5.7.1.