Despatch LEB1-23 User Manual

INSPIRED INNOVATION

u LEB Natural Convection

Benchtop Oven

Simple operation for general laboratory use

e Despatch LEB oven features natural convection that provides the most
economical thermal processing. It is recommended for a variety of standard
laboratory and production applications including drying, curing, annealing
and materials testing.

Reliable, trouble-free performance

e LEB is designed and manufactured to provide years of dependable
service. Despatch warrants the heater performance for a full ve years – the
best warranty in the industry. Every LEB oven is UL and C-UL listed open
control panel and receives a thorough performance test before shipping.

Precise digital controls

Digital controls regulate temperatures within tight tolerances. A 3/4”
(1.9cm) LED panel displays temperatures in large, bright, easy-to-read
numbers. Temperatures can be reported in either Fahrenheit or Celsius.

Airow Design

When forced convection airow is not required, gravity or natural airow
oers high productivity at low cost. e heater generates quick heat-up as
it covers the entire base of the chamber and allows the heated air to move
through the perforated chamber oor.

FEATURES AT A GLANCE

u Natural convection

u Temperatures up to 204° C (400° F)

u 304 Stainless steel interior

u Digital control with 3/4" (1.9cm)

LED display

u Nickel plated shelves - by model rated

from 50 to 100 lbs (23 to 45 kg)

u High-limit control

u Five year heater warranty

Exhaust

Fresh Air

LEB Natural Convection Airflow

Minneapolis • shanghai • Berlin • singapore • hsinchu • tokyo • seoul

LEB 1-23 1-69 2-18

physical specifications

Chamber size (width x depth x height)

* Clear opening width is reduced by 3/4” (1.9 cm)
due to 3/8” (.95 cm) shelf supports on each side.

Capacity in cubic feet (liters) 2.3 (66) 6.9 (196) 18 (510)

Overall size (width x depth x height) 24 x 24.5 x 26 in

Electrical single phase 50/60 HZ

* Operating at 208V will result in
a 25% reduction in heater output.
(Unless conversion kit is used)

Number of shelves provided

Maximum number of shelves on 2 in. (5 cm) centers

Number of doors

Cord and plug 15 amp None - Hardwire None - Hardwire

Approximate net weight 130 lbs (59 kg) 235 lbs (107 kg) 390 lbs (177 kg)

Approximate shipping weight 195 lbs (89 kg) 310 lbs (141 kg) 475 lbs (216 kg)

Volts*

Amps

Heater kW

FUNCTIONAL SPECIFICATIONS

Time to temperature with no load (25˚C to 100˚C) 20 minutes 18 minutes 20 minutes

Time to temperature with no load (25˚C to 200˚C) 35 minutes 30 minutes 36 minutes

Recovery time after door open for 1 minute (150˚C) 4 minutes 4 minutes 4 minutes

Recovery time after door open for 1 minute (204˚C) 6 minutes 7 minutes 7 minutes

Operating range 25˚C to 204˚C 25˚C to 204˚C 25˚C to 204˚C

Control stability +/- 0.5˚C +/- 0.5˚C +/- 0.5˚C

Maximum load capacity 75 lbs. (34 kg) 100 lbs. (45 kg) 150 lbs. (68 kg)

Maximum shelf capacity (standard) 50 lbs. (23 kg) 50 lbs. (23 kg) 50 lbs. (23 kg)

Maximum shelf capacity (reinforced) n/a 100 lbs. (45 kg) 100 lbs. (45 kg)

18* x 18 x 12 in
46* x 46 x 31 cm

61 x 63 x 67 cm

120 240

10.4 5.2

1.2 kW

2 2 2

5 10 16

1 2

30* x 18 x 22 in
77* x 46 x 56 cm

36 x 24.5 x 36.5 in
92 x 63 x 93 cm

120 240

20.4 10.2

2.4 kW

37* x 24 x 35 in
94* x 61 x 89 cm

43 x 30.5 x 51.5 in
110 x 78 x 131 cm

240

15.2

3.6 kW

2

OPTIONS

u Reinforced shelves rated to 100 lbs. (45 kg)

(standard shelves rated to 50 lbs. (23 kg))

u Door with window and interior light

u Oven stacking hardware

u Process timer

u CE Conformance

u Chart recorder

u Access ports

u Oven stand

Notes: Time to temperature and recovery time are based on 240V/60hz operation. Actual results may vary slightly
depending on unit configuration and operating conditions. Minimum operating temperature is based on 20ºC
ambient temperature measured at the fresh air inlet with the exhaust air damper fully open. Specifications are
subject to change without notice.

Warning: Not for use with flammable or combustible materials. If your process has flammable solvents, contact Despatch.

service and technical support

service parts: 1-800-473-7373
international service/main: 1-952-469-8230
service fax: [phone]

gloBal headquarters

phone: 1-888-DESPATCH (1-888-337-7282)
international/main: 1-952-469-5424
fax: [phone]

8860 207th Street West
Minneapolis, MN 55044 USA

[e-mail]

[e-mail]
www.despatch.com

© 2010 Despatch Industries. All rights reserved. Despatch is a registered trademark of Despatch Industries in the U.S. and other countries. Ransco is a product line of Despatch Industries. LEB 1.11