TC_LAB datasheet(13/29 Pages) WAVELENGTH

13 / 29 page

TURN ON THE POWER

1. Press the

Power switch on the back panel to the |

position. The front panel power button light slowly pulses.

2. Press the

Power button on the front panel, the button

illuminates, touchscreen is activated, and the Control

Screen is active.

NOTE: Turning off front

Power button powers down the

application electronics and puts the unit into standby mode.

Turning off rear

Power switch powers down all electronics

and some settings return to factory default.

SET LIMITS

1. Press to access the Limit Screen.

2. Press

+ Limit Current, - Limit Current, Max

Temp, and/or Min Temp values and rotate the

adjustment knob to change each value. The

instrument will beep when set.

Figure 15. Limit Screen

NOTES:

• The

Limit Currents should not exceed the damage current

threshold of the thermoelectric. To operate a resistive heater,

set one limit to

OFF.

• The

Max Temp and Min Temp can be set. If the actual sensor

temperature exceeds these limits, this status is reported

remotely so the user can take action.

• A TTL signal is sent from the LD Shutdown BNC to trigger an

interlock in a laser diode or QCL driver, if the actual temperature

exceeds the limit(s) specified. The factory default polarity is

ACTIVE HI. The polarity can be changed through remote

commands.

• The laser shutdown signal requires that a BNC to BNC cable

is installed between the LD Shutdown on the TC LAB and the

Active Lock on the QCL LAB.

SELECT A SENSOR

The sensor choice determines the sensor voltage to

temperature relationship and which sensor pins are monitored

on the 15+2 D-SUB.

1. Press to access the Sensor Screen.

2. Press the blue sensor name and turn the

adjustment knob to cycle through the factory

default sensor types or any user-defined

sensors that were defined remotely.

The factory default sensors are:

• Thermistor, 5 kΩ 10 µA

• Thermistor, 5 kΩ 100 µA

• Thermistor, 10 kΩ 10 µA

• Thermistor, 10 kΩ 100 µA

• Thermistor, 20 kΩ 10 µA

• Thermistor, 20 kΩ 100 µA

• Thermistor, 50 kΩ 10 µA

• Thermistor, 50 kΩ 100 µA

• Thermistor, 100 kΩ 10 µA

• RTD 2-wire, 100 Ω DIN

• RTD 2-wire, 1 kΩ DIN

• Linear IC Voltage Sensor

• Linear IC Current Sensor

The thermistor name includes the resistance at 25°C and the

bias current base selection. See the thermistor datasheets

for the resistance vs. temperature charts and Steinhart-Hart

coefficients. The TC LAB auto-ranges the bias current by

default. The current level in the sensor name merely defines

the temperature range over which the sensor is calibrated.

A fixed, non-volatile bias current can be configured with a

custom sensor using remote command CONST:THERM with

Firmware Versions 1.99 and 2.01 and later. See the LAB

Series Command Set User Guide for more details.

Figure 16. Sensor Screen

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