FANs 216, 1628.3
Application Note HL-67x5
Issue Date 0401
APPLICATION NOTE
TRUERH™ Series
HL-67x5 Multi-function Humidity Device with Temperature Sensor
Nonstandard Applications
The HL-67N5-8N00P humidity device delivers a standard 0 to 10 VDC or 0 to 20 mA output. This application assumes you are using the HL-67N5-8N00P with an electric actuator that has a different operating range. With adjustments to the setpoint and proportional band settings, the HL-67N5-8N00P interfaces with a variety of nonstandard humidification products.
The HL-67N5-8N00P has a setpoint adjustable from 60 to 95% Relative Humidity (RH) and a proportional band adjustable from 5 to 30% RH. The new values for the HL-67x5 Series’ settings must be determined for the intended nonstandard application.
The following procedure explains how to compute the new setpoint and proportional band settings based on the humidity percentages required to control the duct humidity. (Refer to the Application Setup section in the TRUERH Series HL-67x5 Series Multi-function Humidity Device with Temperature Sensor Installation Instructions for instructions on setting the setpoint and proportional band potentiometers.)
Determining the New Settings
The HL-67N5-8N00P’s output jumper is factory set for 0 to 10 VDC for a voltage input actuator. If using a current input actuator, change the output jumper setting to 0 to 20 mA. (See Figure 1.)
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0 to 10 VDC |
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0 to 20 mA |
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(Factory Set) |
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Figure 1: Setting the Output Jumper
Make a note of the following for the application:
•low limit of the input range of the actuator
•high limit of the input range of the actuator
•required proportional band
•required setpoint
To determine the new proportional band and setpoint settings for the HL-67x5 Series used in the application, proceed to the Instructions section.
IMPORTANT: |
Compute the new setpoint and |
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proportional band values |
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before installing the |
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HL-67N5-8N00P. If the values |
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are out of the humidity device’s |
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range, the HL-67N5-8N00P |
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cannot be used for the |
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intended application. |
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© 2001 Johnson Controls, Inc. |
1 |
Code No. LIT-216026 |
www.johnsoncontrols.com |
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