Filter Cartridge Replacement; Checking The Easidew Plus Portable Hygrometer Electronics Calibration; List Of Spares; Figure 4 2-Wire Connection - View Showing Rear Of Connector Terminal Block - Kahn Easidew Plus User Manual

MAINTENANCE
• Replace the locking screw and cable gland.
5.3

Filter Cartridge Replacement

Unscrew the gas inlet fitting to reveal the filter, which can then simply be removed for
checking or replacement.
5.4

Checking the Easidew Plus Portable Hygrometer Electronics Calibration

Figure 4
To verify if the display electronics are within calibration, a 4-20mA current source can
be connected in place of the sensor.
At 4 mA the display should show -60.0°Cdp ±0.5°C (-76.0°Fdp ±0.9°F)
At 20 mA the display should show -76.0°Fdp ±0.9°F (-60.0°Cdp ±0.5°C)
If the displayed values are outside of this range, please contact Kahn Instruments'
Service Department.
5.5

List of Spares

P/N
SSF-PF-10PK
MDM50-BAT
MDM50-CHR
14
Easidew Plus Portable Hygrometer User's Manual
PIN 1
PIN 3 (GND)

2-Wire Connection - View Showing Rear of Connector Terminal Block
Description
Pack of 10 particulate filter cartridges
Replacement battery pack
Replacement battery charger
Supply
 4-20 mA
Screen/Shield
Optional
97478 Issue 1, October 2014