Michell Instruments S904, Руководство пользователя

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S904 & S904D User’s Manual
Michell Instruments 17
OPERATION
Ground
This pin is connected to the ground of the internal power supply.
Control Probe Outputs, Temperature and %RH
These are fi xed 0 to 10 V outputs from the control probe inside the chamber, ranged
from 0 to 100°C and 0-100% RH respectively.
External set point control
To enable external setpoint control, c5 V to this pin with respect to ground.
3.7 Automatic Control of Temperature and Humidity Set Points - S904
These instructions do not apply to the S904D.
To enable the S904 set points to be controlled using a voltage input:
Chamber Set
Humidity Chamber Set
Temperature
Auto On On Auto
Man. Off Off Man.
2 4 5 4 5 0
Figure 19 Switches
1. Put the
MAN/AUTO
switches into the
AUTO
position.
2. Put the
ON/OFF
switches into the
ON
position.
3. C5 V to pin 24 with respect to ground (pin 21) to enable external
control of the set points.
The unit is now ready to accept external inputs.
External inputs:
• %RH set point
Pin 23, Input: 0 to 10 V, Range: 0 to 100%
• Temperature set point
Pin 10, Input: 0 to 10 V, Range: 0 to 100°C
NOTE: Connections to the external inputs should be made with respect to
ground on pin 21.
NOTE: The maximum temperature in the climate chamber that can be reached
is 52°C, and the minimum is 10°C (18°F) below the ambient temperature.