Laserta deltaT User Manual

deltaT

Temperature controller for dew caps and mirror heater

User’s manual V1.1

Thank you for buying the automated temperature controller from Lacerta

Shipping unit

The regulator comes with two measurement lines for two dewcaps or mirror heaters (telescope tube and finder or secondary mirror). For power supply the deltaT comes with a 2m 12V power cable with a cigarette lighter plug.

deltaT controller box

measurement line 1 (Y-cable) with heater1 sensor (black) and ambient temperature sensor (yellow)

measurement line 2 with heater2 sensor (white) for second dewcap or mirror heater

DC 12V power cable with cigarette lighter plug

Installation

For the control of a dewcap or a mirror heater, the temperature has to be measured permanently. Therefor the temperature sensor 1 (black) is placed between the telescope tube and the dewcap. IMPORTANT: fort the correct temperature value of the heater, an insolation between the telescope tube and the sensor is used (plastic or cardboard). As an alternative, the sensor can be placed outside on the dewcap above the hot area with a tape (test the hot area first)

The ambient sensor (yellow) should be placed in distance to hot parts (cold side of the dewcap or on the telescope or mount)

The two sensors (Ambient & Temp Probe1) use the same jack-plug and should be plugged in to the Temp Probe1 plug.

The dewcap or mirror heater should be plugged into the Heater1 output beside the sensor plug.

After that, the power cable has to be plugged in to one of the two power plugs (They are equivalent In/Out). The other DC IN/OUT could be used to power other 12V devices.