PPI HumiTherm-i Manuel utilisateur
Smart
‘Temperature + Humidity’ Indicator
User Manual
HumiTherm-i
Version : Dry-Bulb RTD Pt100, 3-wire
Wet-Bulb RTD Pt100, 3-wire
Version : RTD Pt100, 3-wire for Temperature
DC Linear (Voltage) for Humidity
CONTENTS
User Manual
HumiTherm-i
1. FRONT PANEL LAYOUT 1
2. BASIC OPERATION 2
3. PAGES AND PARAMETERS 5
4. ALARM PARAMETERS FOR TEMPERATURE 7
5. ALARM PARAMETERS FOR RELATIVE HUMIDITY 8
6. ZERO OFFSET PARAMETERS 9
7. UTILITY PARAMETERS 10
8. HARDWARE ASSEMBLY & CONFIGURATIONS 11
9. 16MECHANICAL INSTALLATION
10. ELECTRICAL CONNECTIONS 17
1. FRONT PANEL LAYOUT 21
2. BASIC OPERATION 23
3. PAGES AND PARAMETERS 25
4. ALARM PARAMETERS FOR TEMPERATURE 27
5. ALARM PARAMETERS FOR RELATIVE HUMIDITY 28
6. ZERO OFFSET PARAMETERS 29
7. UTILITY PARAMETERS 30
8. HARDWARE ASSEMBLY & CONFIGURATIONS 31
9. 36MECHANICAL INSTALLATION
10. ELECTRICAL CONNECTIONS 37
For Dry-Wet
For Temp+RH
1
Section 1
The indicator front panel comprises of digital readouts, LED indicators and membrane keys as shown in Figure 1.1 below.
READOUTS
The Upper Readout is a 4 digit, 7-segment bright red LED display and usually displays the Temperature Value in °C or °F
(depending upon the Unit selected). In Program Mode, the Upper Readout displays parameter values.
The Lower Readout is a 4 digit, 7-segment bright green LED display and usually displays Relative Humidity (RH) Value in %.
Upon holding the UP or DOWN key pressed, the Lower Readout shows the Wet-Bulb Temperature in °C or °F. In Program
Mode, the Lower Readout displays prompts for the parameters.
INDICATORS
There are two front panel red LED indicators. The Table 1.1 below lists each LED indicator (identified by the front panel legend)
and the associated status it indicates.
Table 1.1
Indicator Function
Flashes while the Alarm for Temperature Loop is active.
AL1
Flashes while the Alarm for RH Loop is active.
AL2
KEYS
There are four tactile keys provided on the front panel for configuring the indicator and setting-up the parameter values.
The Table 1.2 below lists each key (identified by the front panel symbol) and the associated function.
Table 1.2
User Manual
HumiTherm-i (Dry-Wet)
Figure 1.1
Upper Readout
Lower Readout
Alarm-2 Indicator
ENTER Key
UP Key
DOWN Key
PAGE Key
Alarm -1 Indicator
PPI
HumiTherm-i
AL1 AL2
°C
%RH
FRONT PANEL LAYOUT
Symbol Key Function
Press to enter or exit set-up mode.
DOWN
UP
Press to increase the parameter value. Pressing once
increases the value by one count; keeping pressed speeds
up the change.
Press to decrease the parameter value. Pressing once
decreases the value by one count; keeping pressed speeds
up the change.
PAGE
ENTER Press to store the set parameter value and to scroll to the
next parameter on the PAGE.
2
Table 2.1
Message Error Type Cause
Sensor Open
Under-range
Over-range Dry Bulb Temperature above Max. Range
Dry Bulb Temperature below Min. Range
Dry Bulb Sensor (RTD) Broken / Open
BASIC OPERATIONS
POWER-UP
Upon power-up, all displays and indicators are lit on for approximately 3 seconds. This is followed by the indication of the
indicator model name on the Upper Readout and the firmware version on the Lower Readout, for approximately
1 second.
MAIN DISPLAY MODE
After the Power-up display sequence, the Upper and Lower Readout starts showing the measured Temperature Value in °C or
°F and the Relative Humidity in %RH, respectively. (The Wet-Bulb Temperature can be viewed on the Lower Readout by
holding the UP or DOWN key pressed.) This is called the MAIN Display Mode and this is the one that shall be used most often.
Error Indication for Relative Humidity (RH)
In case of Wet-Bulb sensor (RTD Pt100) open / broken or in cases where the Dry/Wet Temperatures cause an error in RH
calculation, the Lower Readout flashes the Error Messages as listed in Table 2.2 below.
PV ERROR INDICATIONS
The indicator flashes the PV error messages for Temperature and RH Values on Upper and Lower Readout, respectively.
Error Indication for Dry-Bulb Temperature
In case of Dry-Bulb Temperature exceeding the specified Minimum or Maximum Range or in case of input sensor (RTD Pt100)
open / broken; the Upper Readout flashes the Error Messages as listed in Table 2.1 below.
Table 2.2
Message Error Type Cause
Sensor Open
Under-range
Over-range Wet Bulb Temperature above Max. Range
Wet Bulb Temperature below Min. Range
Wet Bulb Sensor (RTD) Broken / Open
RH Error
This error is indicated in the following cases :
• Dry Bulb Temperature above 102.0°C.
• Dry Bulb Temperature below 0.0°C.
• Wet Bulb depression beyond 50.0°C.
Display Freezes
To 100.0%
This error is indicated in the following cases :
• Wet-Bulb Temperature exceeds Dry-Bulb Temperature.
• Computed % RH above 100.0%.
Display Freezes
To 0.0% Computed % RH is below 0.0%.
User Manual
HumiTherm-i (Dry-Wet)
Section 2
3
Note:
For both Dry and Wet Bulb 3-wire RTD sensor input, if the compensating lead is not connected or gets open, the indicator does not indicate
PV error but the measured value is not compensated for the lead resistance.
OPERATOR PAGE AND PARAMETERS
The indicator provides a separate page, called Operator Page, for the purpose of viewing and / or resetting the stored Min. /
Max. values for Dry- Bulb Temperature and %RH. The parameters on this page are available only if the Min. / Max. feature is
Enabled in Page -13 parameter list.
Accessing Operator Page
Step through the following sequence to open the operator page and to adjust the operator parameter values.
1. Press and release PAGE key. The Lower Readout shows (PAGE) and Upper Readout shows (0).
2. Press ENTER key. The Lower Readout shows prompt for the first available operator parameter and the Upper Readout
shows value for the parameter.
3. Use UP / DOWN keys to adjust the value and then press ENTER key to store the set value and scroll to next parameter.
The indicator automatically reverts to MAIN Display Mode upon scrolling through the last operator parameter. Alternatively,
use PAGE key to return to MAIN Display Mode.
The operator parameters are described in Table 2.3. Note that the parameters are presented only if ‘Min / Max Monitoring’
feature is enabled.
Table 2.3
Parameter Description Settings
(Default Value)
View Only
MAXIMUM DRY BULB
TEMPERATURE VALUE
This parameter indicates the Maximum value attained by the Dry-
Bulb Temperature. This is a read only value and is available only if
Min. /Max. monitoring is enabled.
View Only
MINIMUM DRY - BULB
TEMPERATURE VALUE
This parameter indicates the Minimum value attained by the Dry-
Bulb Temperature. This is a read only value and is available only if
Min. /Max. monitoring is enabled.
View Only
MAXIMUM %RH VALUE
This parameter indicates the Maximum value attained by the
Relative Humidity. This is a read only value and is available only if
Min. /Max. monitoring is enabled.
View Only
MINIMUM PEAK OF RH
This parameter indicates the Minimum value attained by the
Relative Humidity. This is a read only value and is available only if
Min. /Max. monitoring is enabled.
User Manual
HumiTherm-i (Dry-Wet)
4
Parameter Description Settings
(Default Value)
0 to 250
(Default : 0)
RESET PASS - CODE
For Resetting the Min. / Max. values, set the reset command to
‘Yes’ and then set this parameter value to the Pass - Code value
stored at Supervisory level on Page-13.
RESET COMMAND
Available only if Min./Max. monitoring is enabled. This feature
clears the current Min. / Max. values and starts afresh monitoring
the Process Values for new Min & Max. (Default : No)
No
Yes
User Manual
HumiTherm-i (Dry-Wet)
5
The various parameters are arranged in different groups, called PAGES, depending upon the functions they represent. Each
group is assigned a unique numeric value, called PAGE NUMBER, for its access.
The parameters are always presented in a fixed format: The Lower Readout displays the parameter prompt (Identification
Name) and the Upper Readout displays the set value. The parameters appear in the same sequence as listed in their
respective sections.
SET-UP MODE
The Set-up Mode allows the user to view and modify the parameter values. Follow the steps below for setting the parameter
values:
1. Press and release PAGE key. The Lower Readout shows PAGE and the Upper Readout shows page number 0. Refer
Figure 3.1.
2. Use UP / DOWN keys to set the desired PAGE NUMBER.
3. Press and release ENTER key. The Lower Readout shows the prompt for the first parameter listed in the set PAGE and
the Upper Readout shows its current value. If the entered PAGE NUMBER is invalid (contains no parameter list or any
associated function), the indicator reverts to the MAIN Display Mode.
4. Press and release the ENTER key until the prompt for the required parameter appears on the Lower Readout. (The last
parameter in the list rolls back to the first parameter).
5. Use UP / DOWN keys to adjust the parameter value. (The display flashes if UP key is pressed after reaching the maximum
value or DOWN key is pressed after reaching the minimum value).
6. Press and release the ENTER key. The new value gets stored in the indicator’s non-volatile memory and the next
parameter in the list is displayed.
SET-UP MODE : ACCESS AND OPERATION
The Figure 3.1 illustrates the example of altering the value for the parameter ‘Units’.
Notes
1. Each page contains a fixed list of parameters that are presented in a pre-determined sequence. Note however that availability of a few
parameters, called Conditional Parameters, depend upon the settings for some other parameters. For example, the parameter ‘Control
Hysteresis’ for Output-1 is available only if, the set value for the parameter ‘Control Action’ is ‘On-Off’.
2. To exit the set-up mode and return to the MAIN Display Mode, press and release PAGE key.
3. If no key is pressed for approximately 30 seconds, the set-up mode times out and reverts to the MAIN Display Mode.
User Manual
HumiTherm-i (Dry-Wet)
Figure 3.1
Press PAGE
key to enter
Set-up Mode
Use UP/DOWN
key to set the
Page Number
Press ENTER
key to open
the Page
Use UP/DOWN
keys to change
the value
Press ENTER
key to store the value &
move to next parameter
or
Main Display
Mode
Default Page Page Number First Parameter
on Page-13
New Parameter
value
Next Parameter
on Page-13
or
Section 3
6
UnLocking
Repeat the Locking procedure twice for unlocking.
MASTER LOCKING
The indicator facilitates locking all the PAGES (except Operator PAGE) by applying Master Lock Code. Under Locking, the
parameters are available for view only and cannot be adjusted. The Master Lock, however does not lock the operator
parameters. This feature allows protecting the rather less frequently used parameters against any inadvertent changes while
making the frequently used operator parameters still available for any editing.
For enabling / disabling the Lock, step through the following sequence:
Locking
1. Press and release PAGE key while the indicator is in the MAIN Display Mode. The Lower Readout shows PAGE and the
Upper Readout shows 0.
2. Use UP / DOWN keys to set the Page Number to 123 on the Upper Readout.
3. Press and release ENTER key. The indicator returns to the MAIN Display Mode with the Lock enabled.
The Figure 3.2 below illustrates the Locking procedure.
User Manual
HumiTherm-i (Dry-Wet)
Figure 3.2
or
MAIN Display
Mode
Default Page Locking Code MAIN Display
Mode
Press PAGE
key to enter
Set-up Mode
Use UP/DOWN
key to set the
‘Locking Code’
Press ENTER key
to Lock & Return to
Main Mode
7
TEMPERATURE ALARM INHIBIT
Yes
The Alarm activation is suppressed until the Temperature Value is
within Alarm limits from the time the indicator is switched ON. This
allows suppressing the Alarm during the start-up Alarm
conditions.
No
The Alarm is not suppressed during the start-up Alarm conditions.
TEMPERATURE ALARM LOGIC
Select ‘Normal’ if Alarm output is to activate an Audio / Visual
alarm. Select ‘Reverse’ if Alarm output is to Trip the system. Reverse
Direct
(Default : Direct)
Table 4.1
ALARM PARAMETERS FOR TEMPERATURE
Visit www.ppiindia.net for technical notes on ALARM for detailed understanding of the parameters / terminologies used for
describing the Alarm parameters in this section.
The Alarm parameters for Temperature Loop are grouped on PAGE-10. Refer Table 4.1 for parameter description and
settings.
Parameter Description Settings
(Default Value)
-50.0 to 150.0°C or
-58.0 to 302.0°F
(Default :
For Process Low : -50.0
For Process High : 150.0)
(Default : 0.2)
0.1 to 25.0 °C or °F
TEMPERATURE ALARM TYPE
None
Disable the Alarm .
Process Low
The Alarm activates when the Temperature Value equals or falls
below the ‘Alarm Setpoint’ value.
Process High
The Alarm activates when the Temperature Value equals or
exceeds the ‘Alarm Setpoint’ value.
TEMPERATURE ALARM SETPOINT
This parameter sets the Process High or Process Low limit for
Alarm.
TEMPERATURE ALARM HYSTERESIS
This parameter sets a differential (dead) band between the ON
and OFF Alarm states. Keep it large enough to avoid frequent
switching of the Alarm relay.
(Default : None)
Process High
None
Process Low
(Default : Yes)
No
Yes
User Manual
HumiTherm-i (Dry-Wet)
Section 4
8
%RH ALARM INHIBIT
Yes
The Alarm activation is suppressed until the %RH Value is within
Alarm limits from the time the indicator is switched ON. This allows
suppressing the Alarm during the start-up Alarm conditions.
No
The Alarm is not suppressed during the start-up Alarm conditions.
%RH ALARM LOGIC
Select ‘Normal’ if Alarm output is to activate an Audio / Visual
alarm. Select ‘Reverse’ if Alarm output is to Trip the system.
Reverse
Direct
(Default : Direct)
Parameter Description Settings
(Default Value)
0.0 to 100.0%
(Default :
For Process Low : 0.0
For Process High : 100.0)
(Default : 0.2)
0.1 to 25.0%
%RH ALARM TYPE
None
Disable the Alarm.
Process Low
The Alarm activates when the %RH Value equals or falls below the
‘Alarm Setpoint’ value.
Process High
The Alarm activates when the %RH Value equals or exceeds the
‘Alarm Setpoint’ value.
%RH ALARM SETPOINT
This parameter sets the Process High or Process Low limit for
Alarm.
%RH ALARM HYSTERESIS
This parameter sets a differential (dead) band between the ON
and OFF Alarm states. Keep it large enough to avoid frequent
switching of the Alarm relay.
(Default : None)
Process High
None
Process Low
(Default : Yes)
No
Yes
Table 5.1
Visit www.ppiindia.net for technical notes on ALARM for detailed understanding of the parameters / terminologies used for
describing the Alarm parameters in this section.
The Alarm Parameters for %RH Loop are grouped on PAGE-11. Refer Table 5.1 for parameters description and settings.
ALARM PARAMETERS FOR RELATIVE HUMIDITY
User Manual
HumiTherm-i (Dry-Wet)
Section 5
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