Thunder Scientific 2500 series, Руководство по эксплуатации и обслуживанию

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3-3
SATUR °X - The temperature of saturation, Ts, as measured by the saturation fluid
temperature probe. Saturation temperature is used in the calculation of
%RH @PcTc, and is used to control the temperature of the fluid surrounding
the saturator and chamber. Temperatures may be displayed in °C or °F.
CHMBR °X - The temperature of the chamber, Tc, as measured by the chamber
temperature probe. Chamber temperature is used in the calculation of %RH
@PcTc. The chamber temperature probe should be placed as close as
practicable to the humidity sensing element of any device under test.
Chamber temperature typically lags behind the saturation temperature during
excursions away from ambient. Temperatures may be displayed in °C or °F.
FLOW xxx - The mass flow rate displayed in units of L/min, L/h, cfm, or cfh. This
parameter is not used in the calculation of humidity and is only an indication
of the amount of gas flowing through the system. This parameter is used
when performing tests on flow sensitive humidity measurement devices such
as aspirated psychrometers, chilled mirrors, etc.
3.2.2.1 Changing the Display Contrast
To increase the display contrast, press the <1> key repeatedly on the numeric keypad. To
decrease the contrast, press the <0> repeatedly. The new contrast setting is automatically
remembered by the system.
3.2.3 Changing Setpoints
After the initial power-up sequence of section 3.2.1, the Control/Display screen appears. At
the right of the display are 4 rectangular function key menu options. These labels correspond
to the four blank keys on the left side of the numeric keypad.
To change any of the RH, pressure, temperature, or flow setpoints, press the [CHNG SETP]
key. The menu labels then change to arrows.
A cursor block will begin flashing in the "SetPnt" column on the first digit of the current
humidity control parameter (the one with the asterisk to the left). Move the cursor up, down,
left, or right using the appropriate arrow key.
SetPnt Actual
%RH @Pc 50.25
*%RH @PcTc 5_0.00
SATUR Psi
29.40
CHMBR Psi
SATUR
o
C 25.00
CHMBR
o
C
FLOW l/m
20.00