User Controls; Figure 2 User Controls - Michell Instruments Easidew Portable HP User Manual

OPERATION
3.3

User Controls

1 Digital Display
2 Power Switch
3 Fuse
NiMH Battery
4
Pack
Analog Output
6
Socket
7 Gas Fittings
6
Easidew Portable HP User's Manual
1
EASIDEW Portable Hygrometer
°Cdp
Gas Out Gas In
To measure
 
at
line
2 1
pressure
atmospheric
1 2
pressure

Gas Out
Figure 2
Indicates the measured dew point in °C from -100 to +20 (-148
to +68°F).
Under certain conditions the following error messages may be
displayed:
ErrL
= Sensor under range
ErrH
= Sensor over range
Err I
= Sensor fault or sensor disconnected
Switches the Easidew Portable ON or OFF.
This 1A quick blow fuse provides protection for the display
electronics in the event of a fault with the charger or battery
pack. Another protection fuse is located on the display PCB.
Located in the top right hand corner of the instrument, it can be
accessed by removing two screws (5). The battery pack can be
recharged using the supplied charger, via the battery-charging
socket.
The battery pack will charge if the instrument is switched ON or
OFF.
The Easidew portable features an analog output socket that
provides a linear 4-20 mA current loop, scaled to -100 to +20°C
(-148 to +68°F) dew point. This allowed the instrument to be
connected to a chart recorder, data logger or PC to enable dew-
point trends to be analyzed over time.
The Easidew Portable can be used for measurements at line
pressure (up to 300 barg (4350 psig)) or atmospheric pressure.
Swagelok tube fittings are supplied for use with 6mm OD
®
stainless steel tube. There is a 32mm particulate filter (99.5%
removal of 0.1 micron particles) fitted as standard under the
Gas In port position.
2 3 4
Power Fuse
o
-
4-20
mA
O/P
Battery
Charger
Filter Fitted
User Controls
97120 Issue 2.3, October 2019
5
6
7

Gas In