Thermocouple, Millivolt and RTD Calibrator and Thermometer

THERMOCOUPLE CONNECTIONS
Simulating or reading thermocouples requires the use of thermocouple or extension grade thermocouple wire. Plug thermocouple wires into the miniature thermocouple jack or place bare thermocouple wires onto the brass block under the screws.

The CL543B has two banana jacks (1+ and 2-) mounted in the top end of the housing. These are not temperature compensated and are to be used only for millivolt signals.

RTD CONNECTIONS
Simulating or reading RTDs uses copper wire. Plug 2-, 3- or 4-wires into the corresponding jacks on the calibrator. For RTD source the CL543B simulates the (+) RTD from jacks 1 and 4 and the (-) RTD from jacks 2 and 3. When reading an RTD sensor the CL543B uses patented circuitry to automatically detects if 2-, 3- or 4-wires are connected. This is helpful to troubleshoot sensor connections.

Specifications
Operating Temperature Range: -20 to 60°C (-5 to 140°F)
Storage Temperature Range: -30 to 60°C (-22 to 140°F)
Temperature Effect: ?±25 ppm/°C of range
Cold Junction Sensor: ?±0.01% °/° from ambient temperature (°C or °F)
Relative Humidity Range:
    10% ?RH ?90% (0 to 35°C), non-condensing
    10% ?RH ?70% (35 to 60°C), non-condensing
Normal Mode Rejection: 50/60 Hz, 50 dB
Common Mode Rejection: 50/60 Hz, 120 dB
Dimensions: 143 L x 76 W x 41 mm H (5.63 x 3 x 1.60")
Weight: 0.34 kg (12.1 oz) with boot and batteries
Batteries: Four “AA” alkaline 1.5V (LR6) (included), optional NiMh rechargeable battery kit [120 Vac (North America only); charger, 4 NiMh batteries, AC and DC cords
Battery Life: 50 hours, low battery indication with nominal 1 hour of operation left
Over-Voltage Protection: Up to 60 vrms (rated for 30 seconds), protection against misconnection
Alerts: Red LED displays OVERLOAD or out of range conditions
Display: High contrast graphic liquid crystal display, LED backlighting for use in low lit areas
Voltage Source
Ranges and Resolution: -13.000 to 80.000 mV and -13.0000 to 80.0000 mV
Accuracy: ±(0.008% of setting + 0.006 mV)
Source Current: ?10 mA
Output Impedance: <0.3?
RMS Noise: ?±0.0005 mV from 0.1 to 10 Hz
Short Circuit Duration: Infinite Voltage Read
Ranges and Resolution: -13.000 to 80.000 mV and -13.0000 to 80.0000 mV
Accuracy: ±(0.008% of reading + 0.006 mV)
Input resistance: ?10 M? Thermocouple Source
Accuracy: ±(0.008% of setting + 0.006 mV)
Cold Junction Compensation: ±0.05°C (±0.09°F); thermistor traceable to NIST for 11 years
Output Impedance: <0.3?
Source Current: >10 mA (drives 80 mV into 10?)
RMS Noise: ?±0.0005 mV from 0.1 to 10 Hz
Thermocouple Read
Accuracy: ±(0.008% of reading + 0.006 mV)
Cold Junction Compensation: ±0.09°F (±0.05°C); thermistor traceable to NIST for 11 years
Input Impedance: >10 M?
Open Thermocouple Threshold: 10,000? nominal
Pulse: <10 microamp pulse for 300 milliseconds
RTD and O Source
3- and 4-Wire Accuracy:
    From 1 to 10.2 mA External Excitation Current: ±(0.015% of setting + 0.05?)
    Below 1 mA of External Excitation Current: Add (0.025 mV/mA excitation current)
2-Wire Accuracy: Add 0.1? to 3-wire and 4-wire accuracy
Resistance Ranges:
    400? Range: 0.00 to 401.00 and 0.000 to 401.000
    4000? Range: 0.0 to 4010.0 and 0.00 to 4010.00
RMS Noise:
    400? Range: ?±0.005? from 0.1 to 10 Hz
    4000? Range: ?±0.05? from 0.1 to 10 Hz
Allowable Excitation Current Range:
    400? Range: 10.2 mA max; steady or pulsed/intermittent
    4000? Range: 1 mA max; steady or pulsed/intermittent
Pulsed Excitation Current Compatibility: DC to 0.01 second pulse width, 0.025 mV, mA excitation current
RTD and Ohms Read
Resistance Ranges:
    400? Range: 0.00 to 401.00 and 0.000 to 401.000
    4000? Range: 0.0 to 4010.0 and 0.00 to 4010.00
Accuracy: ±(0.015% of reading + 0.05?)
Excitation Current: 0.9 mA to 401?, 0.4 mA to 4010? (nominal)