Rotronic rotronic User manual

HygroLog
Humidity Temperature Data Logger
Instruction Manual

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CONTENTS
Description ....................................................................................................................................... 3
Operation ......................................................................................................................................... 3
Recording and Hold Mode ............................................................................................................... 4
Log Modes and Functions................................................................................................................ 4
Memory ............................................................................................................................................ 5
Display (HygroLog D)....................................................................................................................... 5
Battery Replacement ....................................................................................................................... 6
HygroClip Probes............................................................................................................................. 7
Installation / Removal (Probe or Connector).................................................................................... 8
HW3 System Requirements............................................................................................................. 9
Specifications ................................................................................................................................... 9
Appendix 1: Practical Advice for Measuring Humidity ................................................................... 10
Appendix 2: Maintenance of the ROTRONIC probes.................................................................... 11
Appendix 3: Calibration Basics ...................................................................................................... 12
Appendix 4: Accessories................................................................................................................ 14
PLEASE, READ THIS FIRST
•Check the product for any physical damage that may have occurred during shipment. We
carefully pack and routinely insure all shipments. If any damage has occurred, it is your
responsibility to file a claim with the carrier, prior to returning the damaged product.
Please note that our warranty does not cover damage during shipment.
•Get fully familiarized with the operating limits of the probe and instrument.
•Do not unnecessarily remove the sensor protection (dust filter) from the probe. Both
sensors (humidity and temperature) can be mechanically damaged by careless removal
of the protection.
Each ROTRONIC instrument and probe is carefully calibrated before shipment. No further
adjustments should be required before use. If you have any question or problem, please call
our service department at 631/427-3898 and press 5 (or ask for extension 21).
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Description
The ROTRONIC HygroLog data logger operates with 3 x AA 1.5 V alkaline batteries and accepts
a wide selection of HygroClip®probes to meet
the requirements of different applications. The
HygroClip digital humidity temperature probes
combine advanced ASIC* technology with the
well proven Hygromer C94 capacitive humidity
sensor and a precision RTD temperature sensor. These probes feature high accuracy, long term
reliability and 100% interchangeability to reduce downtime during calibration or repairs. Unless
otherwise specified when ordering, the HygroLog is shipped together with a HygroClip S probe
(shown here).
[*ASIC: Application Specific Integrated Circuit ]
The HygroLog is available with or without LC display (HygroLog D and HygroLog). Both models
can record a maximum of 5,450 data samples consisting of humidity, temperature, date and
time. The log interval is programmable from 15 sec to 2 hours. To conserve battery power, the
HygroLog enters a sleep mode in between samples. With a 5-minute log interval, this allows up to
1 year of data for the model without display and 6 months of data for the model with display. Log
modes include continuous (loop) recording with or without initial delay, start / stop recording and
many other features such as alarms (model with display).
Depending on the model of probe and by remoting the probe with a cable, the HygroLog can
record conditions within the range of 0…100%RH and -50…200°C or -50..392°F. On the model
with display, Fahrenheit temperature values above 200 are shown without decimal.
The probe connector of the HygroLog doubles as an RS232 port (after removing the probe).
Communication with a PC or Laptop requires the Rotronic HW3 software and a connecting cable
(both available under the part number HYGRODATA-HL). HW3 is compatible with Microsoft’s
Windows 95/98 or NT. HW3 is used to program the HygroLog, download the data, convert the
humidity data to dew point or another parameter, display the original or the converted data either
as a table or as a graph, and to calibrate the HygroClip probe.
The temperature unit of both the HygroLog and HW3 can be programmed either as °C or °F.
Operation
The HygroLog is shipped pre-programmed, ready for use with the batteries installed. To start data
recording simply plug in the HygroClip probe. Data recording stops as soon as the HygroClip robe
is removed from the HygroLog.
To check on the status or to re-program the HygroLog, unplug the HygroClip probe and replace it
with the PC connection cable (round connector). Connect the 9-pin connector of the cable to a
free serial port of the PC.
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Install and start the HW3 software (follow the instructions of the short installation paper manual
shipped together with the HW3 CD ROM).
Detailed instructions for using HW3 together with the HygroLog are included on the HW3
CD ROM. These instructions are not repeated here. A net browser – Internet Explorer or
Netscape – is required to read the CD ROM manual (supplied with HW3).
Recording and Hold Mode
! The HygroLog records data only when a HygroClip probe is plugged in.
! Each time that the HygroClip probe is removed, the HygroLog stops recording
and switches to the "Hold Mode" to economize battery power. Recording begins
immediately when the HygroClip probe is plugged in again (unless the "probe
acclimatization delay" feature has been activated when programming the HygroLog).
HygroLog (standard) battery lifetime about 10 years
Hold Mode
HygroLog-D (with LC display) battery lifetime about 2.5 years
Recording Mode battery lifetime depends on the log interval
Log Modes and Functions
Start-Stop Mode Recording stops when the memory is full
Loop Mode Loop (circular) recording
The oldest data is overwritten when the memory is full
Alarm Alarm conditions are shown either on the LC display (HygroLog-D only) or in
the graphic module of the HW3 software.
Log Interval programmable from 15 sec to 2 hours
Units Selectable and visible on the LC display (HygroLog-D only) or on the PC
Temperature : °C, °F
Humidity : %rF, %rh, %HR
Time, Date Automatically adjusted to PC time and date when programming the logger
Delayed Start The beginning of the recording can be delayed by a
maximum of 3 weeks
Probe
Acclimatization
Delay
Delays the beginning of the recording - adjustable from
0 to 2 hours
This delay is useful to avoid erroneous data and false
alarms that could result from plugging-in the HygroClip
probe (influence of the humidity and temperature of the
operator's hand)
Delayed
Recording
When recording is delayed, the HygroLog-D (LC display) shows the measured
values but does not record them.
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Read Status Logger-Type
Serial Number
Battery Lifetime
Date and Time
Note: During each log interval, the HygroLog is active for only the few seconds required to
measure and record the data. The rest of the time, the HygroLog is in a "sleep mode". In this
mode, humidity and temperature conditions, including alarm conditions, as well as events such as
removal of the probe are neither detected nor recorded.
Memory
The HygroLog can record a maximum of 5,450 data samples. Each data sample includes
the following information: humidity, temperature, date and time.
Events such as the removal of the HygroClip probe, the replacement of batteries, etc.,
are also recorded. Limit the number of such events so as to maximize the amount of memory
available for recording actual data.
Display (HygroLog D)
Description of the Display Functions:
Humidity 0 to 100 %RH or %HR
Temperature -50.0 to 199.9°C or °F (Fahrenheit temperature values above 200 are
displayed without decimal)
Operation Immediately after programming, the LC display does not show the
measured values during the first two measuring cycles. After this initial
phase, the display is updated
during each log interval.
Alarm Indication Alarm conditions are indicated by one or more triangles at the bottom of the
display. Several alarm conditions may be displayed simultaneously. An
upward pointing triangle indicates that the maximum alarm value was
reached or exceeded. A downward pointing triangle indicates that the
minimum alarm value was reached or exceeded. Inside the triangle, the
letter H or the letter T denotes humidity or temperature.
The alarm indication remains on the display even after conditions have
returned to normal. The alarm indication can be turned off only with the
HW3 software.
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Battery Indicator A 3-segment battery symbol is used to indicate the following conditions:
3 segments: 66 ... 100% capacity
2 segments: 33 ... 66% capacity
1 segment : 0 ... 33% capacity
Battery - Alert (a triangle with a B) : the batteries are almost empty
Logger is not
recording
This is indicated by a vertical segment ( | ) to the left of the measured
values
Examples: probe acclimatization delay, start delay, logger programmed to
record alarm conditions only (when the conditions are normal)
No Probe Signal The display shows --.- where values are normally displayed. This indicates
either that there is no probe or that the probe is defective.
(see note below)
Note: Programming requires replacing the HygroClip probe with the PC data cable. During the
interval of time between removal of the cable and installation of the HygroClip probe, the
HygroLog may detect that there is no probe signal. Should this happen, it is normal for the display
to initially show --.- where the measured values would normally be displayed. The measured
values will be shown normally at the time of the display update, which happens during the first
log interval. Depending on the duration selected for the log interval, this may take up to 2 hours
when the log interval is also 2 hours.
Battery Replacement
Open the HygroLog (4 Philips screws on the back side). Remove the old batteries and replace
with new ones. Close the HygroLog. After replacing the batteries, the logger is immediately ready
for use and does not require new programming.
Important: Always replace all 3 batteries! (AA 1.5V alkaline batteries)
The HW3 software provides correct information as to the remaining battery lifetime only when all
3 batteries are replaced with fresh batteries at the same time. Remove the batteries only when
you are about to replace them. Battery replacement resets the battery monitoring function to
100% capacity.
See also: Specifications – Batteries
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HygroClip Probes
The ROTRONIC HygroClip digital probes are highly accurate and are calibrated entirely by
means of software (no adjustment potentiometers). Because calibration and other data are stored
in the probe non-volatile memory, the probes are fully interchangeable. When a probe requires
calibration or has to be repaired, it can be replaced with another probe in a few seconds.
Depending on the application, The HygroLog can be used with different models of HygroClip
digital probe. Since the temperature operating range of the HygroLog is limited (see
specifications), measurement at temperatures below -10°C (14°F) and above 50°C (122°F)
generally requires that the probe be remoted from the HygroLog with a length of cable.
The following probes have a DAT05 connector that is directly compatible with the HygroLog or
with the MOK-xx-DAT05 extension cable (see accessories):
HygroClip S (standard with HygroLog)
measurement in air
max. 85°C (185°F) – wire mesh filter
HygroClip SP05
measurement in air ducts
max. 85°C (185°F)
HygroClip SC05
measurement in tight spaces
max. 100°C (212°F)
HygroClip HK25 / HK40 air probe
measurement at high temperature
HK25: max. 150°C (302°F)
HK40: max. 200°C (392°F)
wire mesh filte
r
HygroClip HP28 insertion probe
measurement of materials in bulk
max. 85°C (185°F)
sintered steel filter
HygroClip HS28 sword probe
measurement of paper stacks/rolls
max. 85°C (185°F)
Note: The HygroClip S probe (this probe only), is supported by our rapid exchange program.
Should this probe require calibration or to be repaired, it can be returned to Rotronic and
exchanged for a HygroClip R probe. The HygroClip R is a rehabilitated HygroClip S probe, with
a brand new humidity sensor and a brand new dust filter. The HygroClip R is fully calibrated by
Rotronic in the same manner as a new HygroClip S probe.
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The following probes have a T7 connector. To be compatible with the connector of the HygroLog,
the following probes require extension cable T7-xx-DAT05 (see accessories):
HygroClip IC-1 (100mm) / IC-3 (250mm)
for through-wall installation
max. 200°C (392°F) - wire mesh filter
HygroClip IM-1 (120mm) / IM-3 (270mm)
for through-wall installation in high humidity
applications
max. 200°C (392°F) - wire mesh filter
HygroClip IE-1 (G ½”) / IE-2 (NPT ½”)
for compressed air (max. 50 bar / 725 PSI)
max. 85°C (185°F) – sintered steel filter
to avoid errors, temperature should be the
same on both sides of the mounting wall
Installation / Removal (Probe or Connector)
To install the probe (or connector), position both the probe (or connector) and the locking ring of
the HygroLog so as to align all 4 dots:
- 1 dot on the probe (or connector)
- 2 dots on the HygroLog locking ring
- 1 dot on the connector base of the HygroLog
Push down the probe (or connector) and turn the locking ring clockwise to lock the probe (or
connector) in place. Follow the inverse sequence to remove the probe or connector.
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HW3 System Requirements
PC Pentium 133 MHz or better
Windows 95/98 or NT
Memory 32MB
Disk Space 20MB free
Drives CD ROM drive required
Monitor VGA or Super VGA
800 x 600 (required) or higher / set to small fonts
High Color 16Bit (256 color minimum)
COM port (RS232) one free com port required (COM1-4)
HW3 includes MSIE 4.0 browser and Adobe Acrobat Reader. For best viewing, set fonts to
smallest
Specifications
Probe HygroClip humidity temperature plug-in probe
ROTRONIC Hygromer™ C94
Sensors
Pt100 RTD (1/3 DIN)
0 to 100 %RH
Measuring Range
-50…200°C or –50..392°F (depends on probe)
see also Operating Range of the HygroLog
0…100 %RH (non condensing)
Operating Range
Temperature operating range depends on Batteries
Display-Version max.: -10° to 50°C (14 to 122°F)
±1.5 %RH
Accuracy at 23°C
(probe)
±0.3°C
<0.5 %RH
Repeatability
(probe)
<0.1°C
Communication RS232 (requires HW3 software and connecting cable)
Power 3 x UM3 1.5V Alkaline Batteries
Log Interval adjustable between 15 sec and 120 min.
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Memory about. 5400 samples (consisting of humidity, temperature, time, date)
(> 20 hours with 15 sec log interval and > 59 weeks with 120 min log
interval)
Batteries Use exclusively AA 1.5V alkaline batteries
Important:
do not use NI-accumulators
Rechargeable alkaline batteries may be used
Warning
Prior to using the HygroLog at extreme temperatures
check the maximum operating temperature of the batteries.
ROTRONIC is not liable for damage caused by the batteries!
Most alkaline batteries are limited to the operating range of
-20°C to +54°C (-4 to 130°F)
External Power 8...20 VDC (requires IPH holder + 9V AC adapter)
Important:
The HygroLog will not operate without batteries !
Use of external power conserves the batteries for up a one year
Case material ABS
Protection Grade IP65 / NEMA 12
Dimensions 140x85x25 mm
Weight ca. 200g
Appendix 1: Practical Advice for Measuring Humidity
The most common source of error when measuring relative humidity is a difference between
the temperature of the probe and the temperature of the environment. At a humidity condition
of 50 %RH, a temperature difference of 1°C (1.8 °F) typically results in an error of 3 %RH on
relative humidity.
To avoid temperature errors, insert as much of the probe as possible in the environment to be
measured. If the probe is short, you may have to insert not only the probe itself but also some
of the probe cable. Use the probe configuration that fits best for your application. Please also
note that some probes such as the HygroClip IE (measurement in compressed air) are not
designed to handle any significant temperature gradient between both sides of the mounting
wall.
In extreme situations, condensation may occur on the sensors when the probe is colder than
the environment. As long as the humidity / temperature limits of the humidity sensor are not
exceeded, condensation does not alter the calibration of the sensor. However, the sensor has
to dry out before it can provide a valid measurement.
Non-moving air is an excellent insulator. When there is no air movement, surprising differences in
temperature and humidity can noted over short distances. Air movement at the probe generally
results in measurements that are both faster and more accurate.
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