Firma:              Heraeus

Modell:            UT 5042

Kommentar:   Dokumente engl.

1           Mercury thermometer

2           Models 5050 and 5060:

Control knob for alr vent flap

(mode) 5042: air vent with slide, in the top)

3           Adjustable temperature Ihre cut-out 3a          Red waming lamp,

indicating excess temperature

3b         Reset button

4           Temperature controller

4a         Locking device

4b         Temperature control knob

4c         White pilot lamp, indicating controller in operation

4d         Socket for connection of temperature programmer or recorder

(model NR controller only)')

5           Green pilot lamp, indicatinoven in operation

6           Mains switch

7           Time switch

8           Push-button for time switch

9           Push-button without function

10         Push-button without function

11         Push-button for intemal lighting

----        Special attachment

*)When the oven is used without a programmer (recorder), the short-circuit plug must be inserted in the socket.

The ovens may be equipped with any one of the following temperature controllers:

Model ER eclectronic controller

With PD action

Model NR electronic controller

With PD/PID action

Mechanical controller

Both types of electronic controllers work in conjunction with separate platinum resistance thermometers Pt 100 as temperature sensors. The mechanical controller works in con­junction with an integrated temperature sensor.

Description

The ovens correspond to DIN-Standard 12880 Part 1, and have been type-tested according to DIN-Standard 12880 Part 2.

Protection:

Protection dass 1

Circuit connection:

Permanently installed power supply cable with earthing-contact type plug

Rated voltage, connected load and rated current:

See 1.1. and rating plate.

Rated frequency:

50/60 c/s

Protection against overheating, according to DIN-Standard 12880

Class 2 (adjustable temperature limit cut-out)

Working space:

That part of the internal space which has a distance from any of the inner walls corresponding to one-tenth of the respective internal dimension (see also DIN-Standard 12880 Part 2).

The spatial temperature differences are approx. ± 2 % of the rated temperature.

At lower temperatures, the absolute value of the spatial temperature differences is smaller.

In the case of ovens with a window in the door, the spatial temperature differences may be greater.

UT Ovens

With UT ovens for temperatures up to 250 °C, the spatial temperature differences are approx. ± 3.6 °C; with ovens up to 300 °C approx. ± 4.5 °C. The temperature fluctuations with time is ≦ 0.8 °C. (When an Opto­electronicThyristor Power Unit LE-16 is used in conjunction with a modified controller, DIN-Standard 50011 Part 1 is met).

These ovens have no gap in the door gasket for the air to enter.

With model 5042, air is continually drawn in by the fan when the vent hole is open, passing over the heating system into the internal space.

Model 5050 has two sockets in the rear wall, through which air is drawn in and hot air expelled when the oven is operating with fresh air.