Sections General Operation.4; Front Panel Functions - Omega Engineering CL521 Operator's Manual

SECTION 3 GENERAL OPERATION
3.1 FRONT PANEL FUNCTIONS
The functions of the CL521 have been chosen for their usefulness in temperature
measurement and calibration. The functions are easily selected from the keypad on the
front panel. CL521 functions are listed below and shown in Figure 3-1. For more
complete instructions, refer to Sections 4 to 7.
THERMOCOUPLE MEASUREMENTS:
- Temperature measurement in either °C or °F using ten different thermocouple
types
Reference junction modes:
- External reference junction, if the temperature value is not 0°C, must be
entered into the memory.
- Reference temperature is measured using a Pt100 oc = 0.00385 resistance
probe
- Reference temperature is measured using an internal sensor
- Millivolt measurement -10 to 110 mV
- Thermocouple resistance measurement
RESISTANCE MEASUREMENT:
- Temperature measurement in °C or °F using a Pt100 <=c = 0.00385 resistance
probe
- Ohm measurement 0 to 400 ohms
ADDITIONAL MEASUREMENT FUNCTIONS:
- Rate of change measurement
- Measurement of deviation from a preset value
- Storage of minimum and maximum values
CALIBRATION FUNCTIONS:
- Thermocouple simulation in "C or °F
- Millivolt calibration -10 to 110 mV
Entry of calibration values:
- From keypad
- From memory
- Smooth increase or decrease
- Fine adjust using INC and DEC switches
- Automatic stepping through five preset calibration values
4