ESPEC BTL-433, Инструкция по эксплуатации

Страница: 32 / 60

Criterion Series Benchtop User’s Manual
29
5. Operation
This chapter explains test preparations and preliminary checks, test startup and editing, and some of the
handy features of the Criterion Series. Perform the work described in this chapter before every test.
5.1. Test Preparations
5.1.1. How to Arrange Specimens
Space specimens apart and away from walls so as not to block air circulation inside the test
area. Temperature (& Humidity) uniformity drops if air cannot flow freely, which will throw off test
results.
Specimens should be placed only within the “working” space of the chamber. The “working”
space is defined as the inner 80% of the chamber interior volume with a minimum distance from
the walls being 2” (50 mm). For example:
1. If the chamber width is 20” then the specimen should not be placed closer than 2” to the
chamber side wall.
2. If that same chamber has a depth of 11” then the specimen should not be placed any
closer than 2” from to door or rear wall. (10% is 1.1” however the minimum is 2”)
3. If the chamber height is 32” then the specimen should not be placed closer than 3.2”
from the ceiling or the floor.
5.1.2. Door operation
The chamber door latch is designed to provide a 2 step latching process.
1. Step 1 - The door can be closed without touching the latch handle because the latch
mechanism is spring loaded to avoid damage in case the door accidentally slammed
closed. However in this position the door is not fully sealed and will cause the
chamber to leak water and frost to accumulate in the workspace and on the gasket.
2. Step 2 – Apply pressure to the door handle to completely seal the gasket. In this
position the door is completely sealed.
Door Latch Step 1 “unlatched” Door Latch Step 2 “latched”