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Copyright HK Instruments 2021

www.hkinstruments.fi

Installation version 7.0 2021

SCHEMATICS

DIMENSIONAL DRAWINGS

INSTALLATION

STEP 1: MOUNTING THE DEVICE

1) Mount the device in the desired location (see step 1).
2) Route the cables and connect the wires (see step 2).
3) The device is now ready for configuration.

 

 WARNING! Apply power only after the device is properly wired.

Figure 1a - Surface mounting

1) Select a mounting location on the wall at 1.2–1.8 m (4–6 ft) above 

the floor and at least 50 cm (20 in) from the adjacent wall. Do 
not block device air vents from any direction and leave atleast 
20 cm (8 in) gap to other devices. Locate the unit in an area with 
good ventilation and an average temperature, where it will be 
responsive to changes to the room conditions. The CDT-MOD 
should be mounted on a flat surface.

Do not locate the CDT-MOD where it can be affected by:
•  Direct sunlight
•  Drafts or dead areas behind doors
•  Radiant heat from appliances
•  Concealed pipes or chimneys
•  Outside walls or unheated / uncooled areas

2) Use the device as a template and mark the screw holes.
3) Mount the wall plate with screws.
•  Incorrect installation may cause a shift in temperature output
•  Secure the lid with a locking screw, if the relay is connected to the

mains power

Display locking

jumper

Output mode

selection

jumpers

Contact pins for

relay terminal

Contact pins for

terminal block

Terminal block

Terminal block for relay

99.0

90.0

83.0

49.5

14.0

45.0

18.0

Ø 4.0

32.0

YES

NO

NO

Figure 1b - Mounting orientation

Summary of Contents for CDT-MOD-2000 Series

Page 1: ...where there is a constant source of carbon dioxide present for example hospitals and greenhouses SPECIFICATIONS Performance Measurement ranges CO2 400 2000 ppm Temperature 0 50 C Relative humidity 0 100 Accuracy CO2 40 ppm 2 of reading DC model 75 ppm or 10 of reading whichever is greater Temperature 0 5 ºC Relative humidity 2 3 at 0 50 C and 10 90 rH Total error band includes accuracy hysteresis ...

Page 2: ...a with good ventilation and an average temperature where it will be responsive to changes to the room conditions The CDT MOD should be mounted on a flat surface Do not locate the CDT MOD where it can be affected by Direct sunlight Drafts or dead areas behind doors Radiant heat from appliances Concealed pipes or chimneys Outside walls or unheated uncooled areas 2 Use the device as a template and ma...

Page 3: ...put 0 2 10 V 4 20 mA output Figure 2b Wiring diagram Power input signal output Wires can be routed through the square opening in the back plate Wires can be routed through the top knockouts Wires can be routed through the bottom knockouts Figure 2d Wiring diagram Relay NC COM NO STEP 2 WIRING DIAGRAMS NOTE When using long connection wires it may be necessary to use a separate GND wire for voltage ...

Page 4: ...0 0 90 0 3x0009 TE high limit 16 bit 50 500 5 0 50 0 C 3x0010 TE low limit 16 bit 0 450 0 45 0 C 3x0011 Parameter for relay 16 bit 0 3 0 CO2 1 rH 2 TE 3 Off 3x0012 CO2 relay on 16 bit 500 1950 500 1950 ppm 3x0013 CO2 relay off 16 bit 450 1900 450 1900 ppm 3x0014 rH relay on 16 bit 15 990 1 5 99 0 3x0015 rH relay off 16 bit 10 985 1 0 98 5 3x0016 TE relay on 16 bit 15 490 1 5 49 0 C 3x0017 TE relay...

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