Instruction manual
Option: Alarm unit
(buzzer and continuous 
red light)
• 2
nd
 sensor input for • 
• dew point or 
• consumption 
• sensors VA 400/420
• Standard measuring chamber
Special features
 System ready for plug-in:
  everything completely wired 
 No time-consuming studying of the 
  instruction manual
 2 alarm contacts (230 VAC, 3 A)
  pre- and main-alarm freely adjustable
 4...20 mA analogue output
 Optical alarm: Red flashing
 Parallel indication % RH, °C, °C
td
Option: Integrated data logger
 Recording of dew point progression
  of up to 1 million measured values
 CSM-S for evaluation in graphic and
  table form including USB interface. 
  Read-out of the data optionally 
  by USB or ethernet.
Technical data DS 300
Dimensions:  118 x 115 x 93 mm, IP 65 
  (wall housing)
  92 x 92 x 70 mm, IP 65
  (panel mounting)
Inputs:   2 digital inputs for
  FA 410 resp. VA 400
Interface: USB
Keypad:   4 keys
Power supply:  100...240 VAC, 50-60 Hz
Acccuracy:  see FA 410 page 6
Alarm outputs:   2 relays, 230 VAC, 3 A
Operating temp.:  0...50 °C
Transport  -20...70 °C
temperature:
OPTIONS
Data logger:   1 million meas. values
  start/stop time, meas.
  rate freely adjustable
Description      Order no. 
Dew point set FA 410 for adsorption dryers (-80...20°Ctd)  0600 0410
Dew point set FA 410 for refrigeration dryers (-20...50°Ctd)  0600 0412
Option:
Integrated data logger for 1 million measured values    Z500 3001
Ethernet interface      Z500 3005
Alarm unit mounted at wall housing    Z500 0003
Alarm unit for external mounting with 5 m cable    Z500 0004
Additional accessories:
CSM-S for data evaluation in graphic and table form  0554 7011 
including USB interface
Precision calibration at -40°Ctd including ISO certificate    0699 3396
Precision calibration at 3°Ctd including ISO certificate  3200 0003
Control and calibration set 11.3 % RH  0554 0002
Control and calibration set 33 % RH  0554 0004
Control and calibration set 75.3 % RH  0554 0005
Dew point set FA 410
Ready for upgrading with data logger,
ethernet interface and 2
nd 
sensor input 
Dew point set FA 410
consisting of:
Dew point
18
www.cs-instruments.com
• Multifunction measuring
• instrument DS 300
• Optional: 
• Ethernet 
• interface
쑿
쑿
• Dew point sensor •
• FA 410










